An improved audio amplifier system can both reduce power consumption by supporting a standby mode and shorten wake time when resuming from the standby mode. The audio amplifier system may reduce power by entering a sleep or standby state in response to a command and/or detecting that an audio input signal is not received. Further, the audio amplifier system may use a burst generator to periodically or intermittently activate the power supply during standby mode. By periodically or intermittently activating the power supply, one or more of the capacitors may be charged. By charging the capacitors during standby mode, the time to wake from standby mode may be significantly reduced. In some cases, the wake time may be reduced by several order of magnitudes (e.g., from seconds to milliseconds).
An improved audio amplifier system can both reduce power consumption by supporting a standby mode and shorten wake time when resuming from the standby mode. The audio amplifier system may reduce power by entering a sleep or standby state in response to a command and/or detecting that an audio input signal is not received. Further, the audio amplifier system may use a burst generator to periodically or intermittently activate the power supply during standby mode. By periodically or intermittently activating the power supply, one or more of the capacitors may be charged. By charging the capacitors during standby mode, the time to wake from standby mode may be significantly reduced. In some cases, the wake time may be reduced by several order of magnitudes (e.g., from seconds to milliseconds).
09 - Scientific and electric apparatus and instruments
Goods & Services
Compression and decompression system, namely, hardware in the nature of digital media streaming devices and pre-installed software sold as a component of hardware in the nature of digital media streaming devices used to stream computer video signals, high definition video signals, audio signals, and control signals over IP networks; technology platform in the nature of pre-installed data compression software sold as a component of audiovisual hardware in the nature of digital media streaming devices applied to compression, decompression, and transport of computer video signals, high definition video signals, audio signals, and control signals over IP networks
An audio amplifier that implements current mode control without the use of an explicit or separate current mode sensor is disclosed. The audio amplifier may include a pair of feedback loops that provide current from a node located before an inductor of an output filter and current from a node located after the inductor of the output filter to an integrator circuit. The integrator circuit may be formed from existing circuitry of the audio amplifier controller. Thus, current mode control can be implemented without a separate current mode sensor.
A voltage controlled amplifier with an amplitude limiting circuit, such as a clip limiter, that is separate from the signal path on which the input signal is received by a power amplifier can reduce both noise and power expenditure of the voltage controlled amplifier. The amplitude limiting circuit can include a transistor network that is controlled by a pair of utility operational amplifiers. These utility amplifiers may use less current than the audio amplifier of the voltage controlled amplifier. Further, the transistor network can be deactivated when a signal supplied to the voltage controlled amplifier is below a clipping or other voltage limiting threshold.
Aspects disclosed herein eliminate audible disturbances that may occur when an audio amplifier is activated and deactivated. A feedback circuit is used to maintain a closed loop when transistors of a power output stage are activate or deactivated, thereby enabling the charge to build or dissipate without causing an audible disturbance. Further, in certain implementations, the power output stage may remain in an enable state for a period of time after deactivation of the audio amplifier regardless of whether an audio input signal is received enabling dissipation of charge without causing an audible disturbance.
09 - Scientific and electric apparatus and instruments
Goods & Services
computer hardware and downloadable computer software for processing, distribution, and management of video, audio, control, and USB signals over Ethernet networks, namely, encoding and decoding apparatus and instruments, downloadable decoder software, downloadable software for streaming data, video, and audio signals over Ethernet networks, electronic controls for streaming data, video, and audio signals over Ethernet networks
09 - Scientific and electric apparatus and instruments
Goods & Services
Audiovisual equipment, namely, receivers and computer software applications used to enable wireless communication between portable computing devices and audio-visual presentation equipment
14.
Power supply for class D amplifier in energy efficient applications
A power supply for use with Class D amplifiers in energy efficient applications is described herein. The power supply reduces the effects of off side charging and improves cross regulation. The topology of the power supply can be designed to minimize quiescent mode losses through resonant switching of some or all active switches. Additionally, the power supply can be implemented without external resonant inductors, the power supply can be implemented with smaller capacitors that have longer lifetime ratings, the switching losses present in a power factor correction stage of the power supply can be reduced, and/or a modified power factor correction choke can be utilized to reduce energy loss.
H03F 3/21 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
H03F 3/185 - Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H03F 3/217 - Class D power amplifiersSwitching amplifiers
H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
15.
Method and apparatus for distortion reduction in a class D amplifier
A Class D amplifier is described herein that includes an outer loop, an inner loop, and a notch filter. The notch filter can be located between an output of the outer loop and an input of the inner loop. Alternatively or in addition, the notch filter can be located within the outer loop of the Class D amplifier. Ripple content can initially be present at an input to the inner loop of the Class D amplifier, causing nonlinearity in the inner loop and distortion in the audio output signal. The notch filter can filter the ripple content at the input to the inner loop, thereby reducing the nonlinearity present in the inner loop and the distortion in the audio output signal.
09 - Scientific and electric apparatus and instruments
Goods & Services
Ethernet based communication platform, namely, computer hardware and software that provides for universal connectivity and communications between devices using non-proprietary communication methods
The present invention is a method and apparatus for adaptively compressing and transmitting streaming video, preferably implemented in hardware as part of a codec, that adaptively applies a variable rate of compression to images in a video stream to optimize the quality attainable for a given transport bandwidth. In one or more embodiments, image frames from the video stream are divided into blocks, and a variable compression ratio compression engine compresses the blocks for transmission over a network. Depending on their compressed sizes, one or more of the compressed blocks are packaged into fixed size data packets for transmission over a network. The data packets are fed into a packet buffer. A packet servo releases packets from the buffer to achieve a desired transport data rate. The amount of compression applied by the compression engine is controlled based on the number of packets in the buffer. In one or more embodiments, a plurality of indexed compression vectors are predefined for the compression engine that provide increasing amounts of compression. In one or more embodiments, the index of the compression vector used by the compression engine is incremented when the buffer level of the packet buffer increases, and decremented when the buffer level decreases. In this manner the compression applied by the compression engine automatically adapts to changing entropy within the images of the video stream to optimize the video quality for a given transport data rate.
H04N 19/152 - Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
H04N 19/176 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
H04L 29/06 - Communication control; Communication processing characterised by a protocol
09 - Scientific and electric apparatus and instruments
Goods & Services
Audiovisual recording and streaming systems comprising audiovisual recorders, encoders, or electronic control panels, mounting devices for audiovisual equipment, microphones, power controllers, and cables, namely, data, power, video, and audio cables
Methods of data encoding using trees formed with logic gates are described which lead to spatial compression of image data. Data encoding is achieved using a five-level wavelet transform, such as the Haar or the 2/10 transform. A dual transform engine is used, the first and engine being used for the first part of the first-level transform, the second part of the first-level transform and the subsequent-level transforms being performed by the second transform engine within a time interval which is less than or equal to the time taken by the first transform engine to effect the part-transform. Each bit plane of the resulting coefficients is then encoded by forming a tree structure from the bits and OR logical combinations thereof. Redundant data are removed from the resulting tree structure, and further data can be removed by using a predetermined compression profile. The resulting blocks of compressed data are of variable length and are packaged with sync words and index words for transmission so that the location and identity of the transformed data blocks can be determined from the received signal.
H04N 19/68 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving the insertion of resynchronisation markers into the bitstream
H04N 19/70 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
H04N 19/176 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
H04N 19/64 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by ordering of coefficients or of bits for transmission
H04N 19/63 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
H04N 19/61 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
H04N 19/107 - Selection of coding mode or of prediction mode between spatial and temporal predictive coding, e.g. picture refresh
H04N 19/132 - Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
H04N 19/17 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
H04N 19/635 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by filter definition or implementation details
H04N 19/42 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
H04N 19/89 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
H04N 19/645 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by ordering of coefficients or of bits for transmission by grouping of coefficients into blocks after the transform
H04N 19/86 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness
H04N 19/507 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction using conditional replenishment
H04N 19/174 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a slice, e.g. a line of blocks or a group of blocks
H04N 19/186 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a colour or a chrominance component
H04N 19/51 - Motion estimation or motion compensation
H04N 19/66 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving data partitioning, i.e. separation of data into packets or partitions according to importance
H04N 19/169 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
H04N 19/33 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability in the spatial domain
H04N 19/182 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a pixel
H04N 19/423 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
H04N 19/13 - Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
Methods of data encoding using trees formed with logic gates are described which lead to spatial compression of image data. Data encoding is achieved using a five-level wavelet transform, such as the Haar or the 2/10 transform. A dual transform engine is used, the first and engine being used for the first part of the first-level transform, the second part of the first-level transform and the subsequent-level transforms being performed by the second transform engine within a time interval which is less than or equal to the time taken by the first transform engine to effect the part-transform. Each bit plane of the resulting coefficients is then encoded by forming a tree structure from the bits and OR logical combinations thereof. Redundant data are removed from the resulting tree structure, and further data can be removed by using a predetermined compression profile. The resulting blocks of compressed data are of variable length and are packaged with sync words and index words for transmission so that the location and identity of the transformed data blocks can be determined from the received signal.
H04N 19/132 - Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
H04N 19/33 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability in the spatial domain
H04N 19/63 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
H04N 19/68 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving the insertion of resynchronisation markers into the bitstream
H04N 19/176 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
H04N 19/70 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
H04N 19/64 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by ordering of coefficients or of bits for transmission
H04N 19/61 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
H04N 19/107 - Selection of coding mode or of prediction mode between spatial and temporal predictive coding, e.g. picture refresh
H04N 19/17 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
H04N 19/635 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by filter definition or implementation details
H04N 19/42 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
H04N 19/89 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
H04N 19/645 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by ordering of coefficients or of bits for transmission by grouping of coefficients into blocks after the transform
H04N 19/86 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness
H04N 19/507 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction using conditional replenishment
H04N 19/174 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a slice, e.g. a line of blocks or a group of blocks
H04N 19/186 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a colour or a chrominance component
H04N 19/51 - Motion estimation or motion compensation
H04N 19/66 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving data partitioning, i.e. separation of data into packets or partitions according to importance
H04N 19/169 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
H04N 19/182 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a pixel
H04N 19/423 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
H04N 19/13 - Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
28.
Method and apparatus for compressing image data using a tree structure
Methods of data encoding using trees formed with logic gates are described which lead to spatial compression of image data. Data encoding is achieved using a five-level wavelet transform, such as the Haar or the 2/10 transform. A dual transform engine is used, the first and engine being used for the first part of the first-level transform, the second part of the first-level transform and the subsequent-level transforms being performed by the second transform engine within a time interval which is less than or equal to the time taken by the first transform engine to effect the part-transform. Each bit plane of the resulting coefficients is then encoded by forming a tree structure from the bits and OR logical combinations thereof. Redundant data are removed from the resulting tree structure, and further data can be removed by using a predetermined compression profile. The resulting blocks of compressed data are of variable length and are packaged with sync words and index words for transmission so that the location and identity of the transformed data blocks can be determined from the received signal.
H04N 19/68 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving the insertion of resynchronisation markers into the bitstream
H04N 19/182 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a pixel
H04N 19/63 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
H04N 19/176 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
H04N 19/70 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
H04N 19/64 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by ordering of coefficients or of bits for transmission
H04N 19/61 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
H04N 19/107 - Selection of coding mode or of prediction mode between spatial and temporal predictive coding, e.g. picture refresh
H04N 19/132 - Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
H04N 19/17 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
H04N 19/635 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by filter definition or implementation details
H04N 19/42 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
H04N 19/89 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
H04N 19/645 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by ordering of coefficients or of bits for transmission by grouping of coefficients into blocks after the transform
H04N 19/86 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness
H04N 19/507 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction using conditional replenishment
H04N 19/174 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a slice, e.g. a line of blocks or a group of blocks
H04N 19/186 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a colour or a chrominance component
H04N 19/51 - Motion estimation or motion compensation
H04N 19/66 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving data partitioning, i.e. separation of data into packets or partitions according to importance
H04N 19/169 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
H04N 19/33 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability in the spatial domain
H04N 19/423 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
H04N 19/13 - Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
29.
Method and apparatus for encoding image data using wavelet signatures
Methods of data encoding using trees formed with logic gates are described which lead to spatial compression of image data. Data encoding is achieved using a five-level wavelet transform, such as the Haar or the 2/10 transform. A dual transform engine is used, the first and engine being used for the first part of the first-level transform, the second part of the first-level transform and the subsequent-level transforms being performed by the second transform engine within a time interval which is less than or equal to the time taken by the first transform engine to effect the part-transform. Each bit plane of the resulting coefficients is then encoded by forming a tree structure from the bits and OR logical combinations thereof. Redundant data are removed from the resulting tree structure, and further data can be removed by using a predetermined compression profile. The resulting blocks of compressed data are of variable length and are packaged with sync words and index words for transmission so that the location and identity of the transformed data blocks can be determined from the received signal.
H04N 19/63 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
H04N 19/68 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving the insertion of resynchronisation markers into the bitstream
H04N 19/176 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
H04N 19/70 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
H04N 19/64 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by ordering of coefficients or of bits for transmission
H04N 19/61 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
H04N 19/107 - Selection of coding mode or of prediction mode between spatial and temporal predictive coding, e.g. picture refresh
H04N 19/132 - Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
H04N 19/17 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
H04N 19/635 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by filter definition or implementation details
H04N 19/42 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
H04N 19/89 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
H04N 19/645 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by ordering of coefficients or of bits for transmission by grouping of coefficients into blocks after the transform
H04N 19/86 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness
H04N 19/507 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction using conditional replenishment
H04N 19/174 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a slice, e.g. a line of blocks or a group of blocks
H04N 19/186 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a colour or a chrominance component
H04N 19/51 - Motion estimation or motion compensation
H04N 19/66 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving data partitioning, i.e. separation of data into packets or partitions according to importance
H04N 19/169 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
H04N 19/33 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability in the spatial domain
H04N 19/182 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a pixel
H04N 19/423 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
H04N 19/13 - Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
09 - Scientific and electric apparatus and instruments
Goods & Services
audiovisual system used for switching and distributing digital video and audio signals, namely, transmitters and receivers for sending audiovisual signals over twisted pair cables, audiovisual switchers, and audiovisual distribution amplifiers
A cable retractor is provided. In accordance with at least one embodiment, the cable retractor is articulate, comprising an articulate housing which comprises a cable stop housing pivotably coupled to a pulley housing. In accordance with at least one embodiment, the cable retractor also comprises a first pulley assembly coupled to the pulley housing, an end cap coupled to the pulley housing, a spring coupled to the end cap, and a second pulley assembly coupled to the spring. In accordance with at least one embodiment, the first pulley assembly and the second pulley assembly are disposed within the pulley housing. In accordance with at least one embodiment, a cable stop assembly is coupled to the cable stop housing. In accordance with at least one embodiment, the cable retractor is configured to be mountable to a cable access enclosure in a plurality of orientations.
B65H 75/36 - Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables without essentially involving the use of a core or former internal to a stored package of material, e.g. with stored material housed within casing or container, or intermittently engaging a plurality of supports as in sinuous or serpentine fashion
A simplified VCA circuit is presented. The VCA of the present invention uses fewer components and is less complex than prior art OTA-based VCAs. Further, the VCA of the present invention has improved total harmonic distortion (THD) and DC offset characteristics as compared to prior art VCAs. The VCA may be used to prevent clipping with the addition of clipping detection circuitry.
A modular, customizable, versatile, easy to use, easy to install, aesthetically pleasing surface mountable enclosure is presented. In one or more embodiments, the enclosure includes a modular housing that is configured to be gangable with one or more other housings to provide a range of sizes and configurations. In one or more embodiments, the modular housing is configured to accept a variety of interchangeable cassettes or modules that provide a variety of cable and power connections or other resources. In one or more embodiments, the modular housing includes an articulating lid mechanism that is configured to smoothly open and slide neatly out of the way while occupying a reduced volume than the lid mechanisms of the prior art. In one or more embodiments, the enclosure includes cam driven mounting clamps that allow the enclosure to be quickly and easily secured to a table top or other mounting surface.
A47B 21/06 - Tables or desks specially adapted for use at individual computer workstations, e.g. for word processing or other manual data entryTables or desks specially adapted for typingAuxiliary devices for attachment to such tables or desks characterised by means for holding, fastening or concealing cables
The present invention is a ceiling-mountable enclosure comprising a support frame, a lightweight inner enclosure, and a back box configured for installation in a suspended ceiling. The apparatus of the present invention includes a removable device door configured to be mounted to the support frame. Electrical and signal wires are routed through conduit access plates provided at the back box. Electrical or other equipment is mounted to a removable device door. The removable device door with mounted equipment is attached to the support frame, then rotated upwards to fit flush with the ceiling and fastened to the support frame. A variety of power receptacles are provided that are configured to be mounted to either the back box, the inner enclosure, or the removable device door. The enclosure includes a cooling system comprising an electrically powered fan and air ducts integrated into the inner enclosure.
H05K 13/00 - Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
A47B 81/00 - Cabinets, racks or shelf units specially adapted for other particular purposes, e.g. for storing guns or skis
E04B 9/00 - CeilingsConstruction of ceilings, e.g. false ceilingsCeiling construction with regard to insulation
A47B 46/00 - Cabinets, racks or shelf units, having one or more surfaces adapted to be brought into position for use by extending or pivoting
F16M 13/02 - Other supports for positioning apparatus or articlesMeans for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
The present invention is a speed control for a cable retractor. The cable retractor with which the speed control is used comprises a pulley that engages a cable that may be extended and retracted. A friction element configured to adjustably contact the cable adjacent to the pulley is attached to a movable linkage. The movement of the linkage is constrained to move along a predetermined path such that movement of the linkage along the path alters the distance between the friction element and the pulley. In one or more embodiments a cantilevered spring is attached to the linkage. An adjustable control, for example a thumbscrew, is configured to move the spring in relation to the linkage in a manner that alters the position of the friction element with respect to the cable and/or the pressure exerted by the friction element on the cable.
B65H 75/36 - Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables without essentially involving the use of a core or former internal to a stored package of material, e.g. with stored material housed within casing or container, or intermittently engaging a plurality of supports as in sinuous or serpentine fashion
The present invention comprises a loudspeaker system that includes a loudspeaker and a detachable mount. In one or more embodiments, the loudspeaker and mount include electrical connectors that are engaged when the loudspeaker is attached to the mount. In one or more embodiments, the loudspeaker and mount comprise mating mounting structures that support the loudspeaker on the mount when the mounting structure of the loudspeaker is engaged with the mounting structure of the mount. In one or more embodiments, multiple configurations of the mount are provided that allow the loudspeaker to be mounted with a variety of orientations with respect to the mounting surface. In one or more embodiments, the loudspeaker comprises a tweeter with a rotatable wave guide that allows the dispersion angle of the tweeter to be adjusted to accommodate the variety of orientations at which the loudspeaker may be mounted.
H04R 1/20 - Arrangements for obtaining desired frequency or directional characteristics
H04R 1/34 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
H04R 1/32 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, apparatus is provided comprising a ground plane, a loudspeaker driver mounted in a loudspeaker driver aperture of the ground plane, and a grille positioned relative to the ground plane such that a distance between the grille and the ground plane decreases with increasing distance from the loudspeaker driver. The loudspeaker assembly can be used to replace ceiling tiles having any size or configuration, and can also me mounted in other surfaces, such as ceiling walls, floors, table tops, etc. made of drywall, hard decking, wood, stone, cement, glass, or any other material or type of construction, or configured in a stand-alone loudspeaker frame or cabinet. The loudspeaker assembly of the present invention can be mounted in any orientation.
A USB peripheral device comprising a limited function Universal Serial Bus (USB) host controller configured to control HID compliant USB peripheral devices on a downstream facing USB port is disclosed. The port is also capable of dynamically interfacing to any USB compliant peripheral device.
G06F 3/00 - Input arrangements for transferring data to be processed into a form capable of being handled by the computerOutput arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
G06F 13/00 - Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
09 - Scientific and electric apparatus and instruments
Goods & Services
audiovisual equipment and technology, namely, microprocessors with software for use in controlling audiovisual devices and integrating them with touch screens
A triangular waveform generator includes a square waveform clock circuit and an integrating circuit. The integration circuit receives input from the square waveform clock circuit and generates a triangular waveform output. A feedback circuit is operatively connected to the integrating circuit to reduce the audio band noise content in the triangular waveform output. The feedback circuit acts as a DC balance without significant sacrifice in the linearity of the triangular waveform output.
The present invention relates to a loudspeaker assembly and a method of assembling a loudspeaker assembly. In one or more embodiments, the invention comprises forming a front baffle comprising a first driver mounting portion, an intermediate portion, and an edge mounting portion. A first driver is installed in the first driver mounting portion proximate to a first driver aperture. A rear baffle is formed from a second material, which, in one or more embodiments, is less stiff than the first material from which the front baffle is formed. The rear baffle comprises a top portion, sidewalls, a recessed mounting portion, and an edge portion. The edge mounting portion of the front baffle is attached to the recessed mounting portion of the rear baffle such that an entirety of said front baffle is recessed within said rear baffle spaced apart from said open bottom portion.
The present invention comprises a method and apparatus for installing a tile-mounted ceiling speaker that combines the ease of installation of a lay-in speaker system with the visual appearance of a tile-mounted speaker system. In one or more embodiments, the apparatus of the present invention includes a support frame, back box assembly configured for installation on top of a ceiling tile, a ceiling ring configured to be mounted in an opening in a ceiling tile, and a loudspeaker cartridge configured to be mounted to the support frame through the ceiling tile opening.
The present invention comprises a loudspeaker system that includes a loudspeaker and a detachable mount. In one or more embodiments, the loudspeaker and mount include electrical connectors that are engaged when the loudspeaker is attached to the mount. In one or more embodiments, the loudspeaker and mount comprise mating mounting structures that support the loudspeaker on the mount when the mounting structure of the loudspeaker is engaged with the mounting structure of the mount. In one or more embodiments, multiple configurations of the mount are provided that allow the loudspeaker to be mounted with a variety of orientations with respect to the mounting surface. In one or more embodiments, the loudspeaker comprises a tweeter with a rotatable wave guide that allows the dispersion angle of the tweeter to be adjusted to accommodate the variety of orientations at which the loudspeaker may be mounted.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
installation and maintenance of audio and video systems for others audio and video system design services for others; installation and maintenance of computer software for managing audio and video systems for others
41 - Education, entertainment, sporting and cultural services
Goods & Services
educational services, namely, providing live and online classes in the field of audio and video system design, installation, and service and distribution of training material in connection therewith
In accordance with at least one embodiment, an enclosure for tablet devices with features to provide secure mounting options is described. In accordance with at least one embodiment, the enclosure provides options to mount a tablet device in either a desktop stand or onto a variety of other supports, including VESA compliant mounts and electrical junction boxes. Security options include the ability to secure the tablet device inside the enclosure to provide a deterrent to theft or vandalism. Optionally, additional levels of security may be provided that limit access to the tablet device's control features (i.e., control buttons, cameras, sensors) to prevent unauthorized or accidental activation of these controls. In accordance with at least one embodiment, access to the tablet device's display, button(s), camera(s), microphone(s), speaker(s), connector(s), and/or tactile feedback of button(s) or other devices can be selectively maintained or prevented while the tablet device is enclosed in the tablet enclosure.
A method and apparatus for providing a power supply for an amplifier is provided. The power conversion is achieved using synchronous rectifiers in a regulated half bridge power supply, taking the sum of the positive and negative rails as feedback, in order facilitate energy transfer between positive and negative output rails. This minimizes the effects of off side charging and rail sag, as well as achieving good line regulation, while allowing use of very small, low value output capacitors.
A ceiling speaker assembly is disclosed. In one or more embodiments, the ceiling speaker assembly includes a three-dimensional support frame attached to a perforated grille. The support frame is configured with a speaker aperture adjacent to which a speaker is mounted and a port aperture. The speaker aperture and port aperture are configured such that the speaker aperture is in communication with the front of the speaker and the port aperture is in communication with the rear of the speaker. In one or more embodiments, the support frame includes a horn cavity that functions as an acoustical cross-over such that higher frequencies generated by the speaker are emitted primarily through the speaker aperture and the lower frequencies generated by the speaker are emitted primarily through the port aperture.
The present invention comprises a tile-mounted ceiling speaker that combines the ease of installation of a lay-in speaker system with the visual appearance of a tile-mounted speaker system. In one or more embodiments, the apparatus of the present invention includes a support frame and back box assembly configured for installation on top of a ceiling tile and a loudspeaker cartridge configured to be mounted to the support frame through an appropriately-sized hole in the ceiling tile. In one or more embodiments, the invention comprises a peripheral flange and a plurality of flip dogs for mounting the cartridge to the support frame that are configured to be disposed in the interior of the back box when engaged.
The present invention comprises a method and apparatus for installing a tile-mounted ceiling speaker that combines the ease of installation of a lay-in speaker system with the visual appearance of a tile-mounted speaker system. In one or more embodiments, the method of the present invention comprises forming an appropriately-sized hole in a ceiling tile, laying an integrated back box and support frame on top of the ceiling tile, connecting wires from an external audio source to terminals provided at the back box, connecting wires provided on the inside of the back box to a loudspeaker cartridge, inserting the loudspeaker cartridge into the hole in the ceiling tile from below, fastening the loudspeaker cartridge to the support frame, and fastening a grille to the loudspeaker cartridge.
The present invention comprises a loudspeaker system that includes a loudspeaker and a detachable mount. In one or more embodiments, the loudspeaker and mount include electrical connectors that are engaged when the loudspeaker is attached to the mount. In one or more embodiments, the loudspeaker and mount comprise mating mounting structures that support the loudspeaker on the mount when the mounting structure of the loudspeaker is engaged with the mounting structure of the mount. In one or more embodiments, mating electrical connectors are incorporated in the mounting structures such that engaging the mounting structures simultaneously engages the electrical connectors. In one or more embodiments, the loudspeaker comprises a locking mechanism that positively retains the loudspeaker on the mount. In one or more embodiments, the locking mechanism is hidden behind a flexible grill of the loudspeaker such that pressing on a corresponding location on the grill releases the locking mechanism allowing the loudspeaker to be detached from the mount. In one or more embodiments, the mount is configured to be mountable to a standard US or European electrical wiring box. In one or more embodiments, the mating mounting structures are configured to be engageable with a reduced amount of travel. In one or more embodiments, multiple configurations of the mount are provided that allow the loudspeaker to be mounted with a variety of orientations with respect to the mounting surface.
The present invention comprises a loudspeaker system that includes a loudspeaker and a detachable mount. In one or more embodiments, the loudspeaker and mount include electrical connectors that are engaged when the loudspeaker is attached to the mount. In one or more embodiments, the loudspeaker and mount comprise mating mounting structures that support the loudspeaker on the mount when the mounting structure of the loudspeaker is engaged with the mounting structure of the mount. In one or more embodiments, mating electrical connectors are incorporated in the mounting structures such that engaging the mounting structures simultaneously engages the electrical connectors. In one or more embodiments, the loudspeaker comprises a locking mechanism that positively retains the loudspeaker on the mount. In one or more embodiments, the locking mechanism is hidden behind a flexible grill of the loudspeaker such that pressing on a corresponding location on the grill releases the locking mechanism allowing the loudspeaker to be detached from the mount. In one or more embodiments, the mount is configured to be mountable to a standard US or European electrical wiring box. In one or more embodiments, the mating mounting structures are configured to be engageable with a reduced amount of travel. In one or more embodiments, multiple configurations of the mount are provided that allow the loudspeaker to be mounted with a variety of orientations with respect to the mounting surface.
The present invention relates to a loudspeaker assembly and a method of assembling a loudspeaker assembly. In one or more embodiments, the invention comprises forming a front baffle comprising a first driver mounting portion, an intermediate portion, and an edge mounting portion. A first driver is installed in the first driver mounting portion proximate to a first driver aperture. A rear baffle is formed from a second material, which, in one or more embodiments, is less stiff than the first material from which the front baffle is formed. The rear baffle comprises a top portion, sidewalls, a recessed mounting portion, and an edge portion. The edge mounting portion of the front baffle is attached to the recessed mounting portion of the rear baffle such that an entirety of said front baffle is recessed within said rear baffle spaced apart from said open bottom portion.
An external power supply housing configured for multiple mounting options. In one or more embodiments, the housing of the invention comprises channels configured to accept straps for mounting said housing to a support structure by means of those straps. In one or more embodiments, the housing of the invention comprises threaded inserts configured to mount said housing to a support structure by means of threaded fasteners. In one or more embodiments, the housing of the invention comprises a snap engagement portion configured to snap engage a mating power supply caddy for mounting the housing to the caddy.
B65D 8/18 - Containers having a curved cross-section formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal, plastics, wood or substitutes therefor characterised by wall construction or by connection between walls with permanent connections between walls
09 - Scientific and electric apparatus and instruments
Goods & Services
audiovisual system used for switching and distribution of digital video and audio signals, namely, transmitters and receivers for sending AV signals over twisted pair cables or fiber optic cables, AV switchers and AV distribution amplifiers
09 - Scientific and electric apparatus and instruments
Goods & Services
audiovisual system used for switching and distribution of digital video and audio signals, namely transmitters and receivers for sending AV signals over twisted pair cables or fiber optic cables, AV switchers and AV distribution amplifiers
A USB peripheral device comprising a limited function Universal Serial Bus (USB) host controller configured to control HID compliant USB peripheral devices on a downstream facing USB port is disclosed. The port is also capable of dynamically interfacing to any USB compliant peripheral device.
G06F 3/00 - Input arrangements for transferring data to be processed into a form capable of being handled by the computerOutput arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
G06F 13/00 - Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
78.
Method and apparatus for producing triangular waveform with low audio band content
A triangular waveform generator includes a square waveform clock circuit and an integrating circuit. The integration circuit receives input from the square waveform clock circuit and generates a triangular waveform output. A feedback circuit is operatively connected to the integrating circuit to reduce the audio band noise content in the triangular waveform output. The feedback circuit acts as a DC balance without significant sacrifice in the linearity of the triangular waveform output.
A feedback circuit for restoration of DC in electrical signals is presented. A sample pulse representing a DC portion of an electrical signal is generated. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the electrical signal during this DC portion. The offset voltage feeds back through a summing node to the electrical signal thereby restoring the video signal to the desired DC voltage level with respect to ground.
A loudspeaker assembly is provided. In one or more embodiments the loudspeaker assembly comprises a perforated grille, a three dimensional loudspeaker frame to which a speaker driver is mounted, and a rear baffle. In one or more embodiments, the loudspeaker frame and rear baffle define a controlled volume around the speaker driver. In one or more embodiments the controlled volume comprises a driver cavity and a horn cavity in communication with the driver cavity and a port aperture.
A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, apparatus is provided comprising a ground plane, a loudspeaker driver mounted in a loudspeaker driver aperture of the ground plane, and a grille positioned relative to the ground plane such that a distance between the grille and the ground plane decreases with increasing distance from the loudspeaker driver. The loudspeaker assembly can be used to replace ceiling tiles having any size or configuration, and can also me mounted in other surfaces, such as ceiling walls, floors, table tops, etc. made of drywall, hard decking, wood, stone, cement, glass, or any other material or type of construction, or configured in a stand-alone loudspeaker frame or cabinet. The loudspeaker assembly of the present invention can be mounted in any orientation.
09 - Scientific and electric apparatus and instruments
Goods & Services
Audiovisual equipment, namely, video and audio switching systems consisting of electronic control panels, cables, digital switchers, analog switchers; mounting devices in the nature of surface access boxes specially adapted for audio-visual presentation equipment
A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, a method is provided which comprises forming a loudspeaker frame so as to define a driver housing portion, a horn portion, and a conformal portion. A driver aperture is defined for the driver housing portion, and a port aperture is defined for the horn portion. A driver is attached to the loudspeaker frame proximate to the driver aperture. A rear baffle is applied to a first conformal portion surface of the conformal portion of the loudspeaker frame. The rear baffle defines a horn cavity wall of a horn cavity of the horn portion. The horn cavity has an increasing cross sectional area as the distance from the driver housing portion increases. A grille is applied to a second conformal portion surface of the conformal portion of the loudspeaker frame.
The present invention comprises a method and apparatus for installing a tile-mounted ceiling speaker that combines the ease of installation of a lay-in speaker system with the visual appearance of a tile-mounted speaker system. In one or more embodiments, the apparatus of the present invention includes a support frame and back box assembly configured for installation on top of a ceiling tile and a loudspeaker cartridge configured to be mounted to the support frame through an appropriately-sized hole in the ceiling tile. In one or more embodiments, the method of the present invention comprises forming an appropriately-sized hole in a ceiling tile, laying an integrated back box and support frame on top of the ceiling tile, connecting wires from an external audio source to terminals provided at the back box, connecting wires provided on the inside of the back box to a loudspeaker cartridge, inserting the loudspeaker cartridge into the hole in the ceiling tile from below, fastening the loudspeaker cartridge to the support frame, and fastening a grille to the loudspeaker cartridge. In one or more embodiments, a variety of interchangeable loudspeaker cartridges having differing loudspeaker configurations are provided. In one or more embodiments, the support frame and back box assembly is configured to allow installation of more than one loudspeaker cartridge. In one or more embodiments, the loudspeaker cartridges are configured for use both with a back box and without back box.
The present invention comprises a method and apparatus for installing a tile-mounted ceiling speaker that combines the ease of installation of a lay-in speaker system with the visual appearance of a tile-mounted speaker system. In one or more embodiments, the apparatus of the present invention includes a support frame and back box assembly configured for installation on top of a ceiling tile and a loudspeaker cartridge configured to be mounted to the support frame through an appropriately-sized hole in the ceiling tile. In one or more embodiments, the method of the present invention comprises forming an appropriately-sized hole in a ceiling tile, laying an integrated back box and support frame on top of the ceiling tile, connecting wires from an external audio source to terminals provided at the back box, connecting wires provided on the inside of the back box to a loudspeaker cartridge, inserting the loudspeaker cartridge into the hole in the ceiling tile from below, fastening the loudspeaker cartridge to the support frame, and fastening a grille to the loudspeaker cartridge. In one or more embodiments, a variety of interchangeable loudspeaker cartridges having differing loudspeaker configurations are provided. In one or more embodiments, the support frame and back box assembly is configured to allow installation of more than one loudspeaker cartridge. In one or more embodiments, the loudspeaker cartridges are configured for use both with a back box and without back box.
09 - Scientific and electric apparatus and instruments
Goods & Services
computer-based software used for configuration and setup of electrical and mechanical hardware devices for the purpose of integrating device management and control using a network based system
The present invention relates to a loudspeaker assembly and a method of assembling a loudspeaker assembly, comprising forming a front baffle, a first driver mounting portion, an intermediate portion, and an edge mounting portion. A port aperture formed in the intermediate portion, and a first driver installed in the first driver mounting portion. A rear baffle comprises a top portion, sidewalls, a recessed mounting portion, an edge portion and an electrical assembly. The edge mounting portion of the front baffle is attached to the recessed mounting portion of the rear baffle, and the rear baffle is secured to the back of the first driver. A back box is placed over the rear baffle provides thermal insulation, and a mounting plate securely attaches the first driver to a structural support. A perforated grille is crimped to the edge portion of the rear baffle and an edge portion of the back box.
A triangular waveform generator includes a square waveform clock circuit and an active integrator. The active integrator receives input from the square waveform clock circuit and generates a triangular waveform output. An active feedback network is operatively added to the active integrator to reduce the audio band noise content in the triangular waveform output. The feedback network acts as a DC balance without significant sacrifice in the linearity of the triangular waveform output.
A method and apparatus for secure distribution of digital content is provided. In accordance with at least one embodiment, an intermediate device maintains an authorized content sink list which it uses to allow reauthorization of a first content sink for access to first content from a first content source when the first content sink has a first content sink entry on the authorized content sink list. In accordance with at least one embodiment, reauthorization is conditioned upon a first content sink entry currency status having not yet expired. In accordance with at least one embodiment, the intermediate device allows authentication of the first content sink by the first content source when no first content sink entry exists on the authorized content sink list or when the first content sink entry currency status has expired.
A method and apparatus for power conversion in a class D amplifier is provided. The power conversion is achieved using synchronous rectifiers in a regulated half bridge power supply, taking the sum of the positive and negative rails as feedback, in order facilitate energy transfer between positive and negative output rails. This minimizes the effects of off side charging and rail sag, as well as achieving good line regulation, while allowing use of very small, low value output capacitors.
