Embodiments provide methods, apparatuses, and systems for performing crosstalk cancellation and/or generation of virtual speakers. An audio processor may include a crosstalk cancellation circuit and a linearization circuit. The linearization circuit may offset the frequency response of the crosstalk cancellation circuit to provide an overall frequency response that is flat. A virtual speaker circuit may receive an input signal associated with an output channel and pass the input signal to the output channel unmodified. The virtual speaker circuit generates a virtualization signal based on the input signal and passes the virtualization signal to another physical channel. The virtualization signal may be generated further based on an ipsilateral head-related transfer function (HRTF) and a contralateral HRTF that correspond to a virtual speaker location of a virtual speaker generated by the virtual speaker circuit. Other embodiments may be described and/or claimed.
H04S 5/00 - Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
2.
ACOUSTIC CROSSTALK CANCELLATION AND VIRTUAL SPEAKERS TECHNIQUES
Embodiments provide methods, apparatuses, and systems for performing crosstalk cancellation and/or generation of virtual speakers. An audio processor may include a crosstalk cancellation circuit and a linearization circuit. The linearization circuit may offset the frequency response of the crosstalk cancellation circuit to provide an overall frequency response that is flat. A virtual speaker circuit may receive an input signal associated with an output channel and pass the input signal to the output channel unmodified. The virtual speaker circuit generates a virtualization signal based on the input signal and passes the virtualization signal to another physical channel. The virtualization signal may be generated further based on an ipsilateral head-related transfer function (HRTF) and a contralateral HRTF that correspond to a virtual speaker location of a virtual speaker generated by the virtual speaker circuit. Other embodiments may be described and/or claimed.
H04S 5/00 - Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
Embodiments provide methods, apparatuses, and systems for performing crosstalk cancellation and/or generation of virtual speakers. An audio processor may include a crosstalk cancellation circuit and a linearization circuit. The linearization circuit may offset the frequency response of the crosstalk cancellation circuit to provide an overall frequency response that is flat. A virtual speaker circuit may receive an input signal associated with an output channel and pass the input signal to the output channel unmodified. The virtual speaker circuit generates a virtualization signal based on the input signal and passes the virtualization signal to another physical channel. The virtualization signal may be generated further based on an ipsilateral head-related transfer function (HRTF) and a contralateral HRTF that correspond to a virtual speaker location of a virtual speaker generated by the virtual speaker circuit. Other embodiments may be described and/or claimed.
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Mobile devices, namely mobile phones, smartphones, laptop
computers, wireless speakers, and tablet computers; wireless
audio speakers; powered loudspeakers; network hardware
devices, namely, network routers, network hubs; digital
media hubs for audio and video; wireless digital media hubs
for audio and video; computer monitors; audio codec in the
nature of signal processors; audio adapters, namely plug
adaptors, adaptor plugs, power adapters, and electric
adaptor cables; system on a Chip (SoC); downloadable
software for audio rendering and playback; downloadable
software for rendering, processing and/or playback of
spatialized audio signals; professional cinema and studio
loudspeaker systems comprising cinema signal processors for
audio speakers, sound amplifiers, sound crossovers, and
loudspeakers. Testing of goods of others, namely audio and video equipment
for concerts, live entertainment events, mobile devices,
laptop computers, mobile phones, smartphones, loudspeakers,
soundbars, wireless speakers, tablet computers, mobile
device speakers, headphones, network hardware devices,
digital media hubs for audio and video, computers, computer
monitors, audio codec signal processors, audio adapters,
system on a chip (SoC), and wireless audio speaker modules;
and consultation services therefore; providing temporary use
of online, non-downloadable software for processing
spatialized audio signals; providing temporary use of
online, non-downloadable software for audio rendering and
playback.
Embodiments provide an audio amplifier circuit with integrated (built-in) filter (e.g., a digital-to-analog converter (DAC) filter). The audio amplifier circuit may have a non-flat (e.g., low-pass) closed loop frequency response. The audio amplifier circuit may include a low pass filter coupled between an input terminal that receives the input analog audio signal and the input of the gain stage of the amplifier. In some embodiments, additional impedance networks may be included to produce a desired low-pass filter response, such as a second order filter, a third order filter, and/or another suitable filter response. Other embodiments may be described and/or claimed.
Embodiments provide an audio amplifier circuit with integrated (built-in) filter (e.g., a digital-to-analog converter (DAC) filter). The audio amplifier circuit may have a non-flat (e.g., low-pass) closed loop frequency response. The audio amplifier circuit may include a low pass filter coupled between an input terminal that receives the input analog audio signal and the input of the gain stage of the amplifier. In some embodiments, additional impedance networks may be included to produce a desired low-pass filter response, such as a second order filter, a third order filter, and/or another suitable filter response. Other embodiments may be described and/or claimed.
H03F 1/00 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H03F 1/08 - Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
H03F 1/26 - Modifications of amplifiers to reduce influence of noise generated by amplifying elements
H03F 1/32 - Modifications of amplifiers to reduce non-linear distortion
H03F 1/34 - Negative-feedback-circuit arrangements with or without positive feedback
H03F 1/56 - Modifications of input or output impedances, not otherwise provided for
H03F 3/181 - Low-frequency amplifiers, e.g. audio preamplifiers
H03F 3/183 - Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
H03F 3/42 - Amplifiers with two or more amplifying elements having their DC paths in series with the load, the control electrode of each element being excited by at least part of the input signal, e.g. so-called totem-pole amplifiers
H03F 3/50 - Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Mobile devices, namely mobile phones, smartphones, laptop
computers, wireless speakers, and tablet computers; wireless
audio speakers; powered loudspeakers; network hardware
devices, namely, network routers, network hubs; digital
media hubs for audio and video; wireless digital media hubs
for audio and video; computer monitors; audio codec in the
nature of signal processors; audio adapters, namely plug
adaptors, adaptor plugs, power adapters, and electric
adaptor cables; system on a Chip (SoC); downloadable
software for audio rendering and playback; downloadable
software for rendering, processing and/or playback of
spatialized audio signals; professional cinema and studio
loudspeaker systems comprising cinema signal processors for
audio speakers, sound amplifiers, sound crossovers, and
loudspeakers. Testing of goods of others, namely audio and video equipment
for concerts, live entertainment events, mobile devices,
laptop computers, mobile phones, smartphones, loudspeakers,
soundbars, wireless speakers, tablet computers, mobile
device speakers, headphones, network hardware devices,
digital media hubs for audio and video, computers, computer
monitors, audio codec signal processors, audio adapters,
system on a chip (SoC), and wireless audio speaker modules;
and consultation services therefore; providing temporary use
of online, non-downloadable software for processing
spatialized audio signals; providing temporary use of
online, non-downloadable software for audio rendering and
playback.
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Mobile devices, namely, mobile phones, smartphones, laptop computers, wireless speakers, and tablet computers; Wireless audio speakers; Powered loudspeakers; Network hardware devices, namely, network routers, network hubs; Digital media hubs for audio and video; Wireless digital media hubs for audio and video; Computer monitors; Audio codec in the nature of signal processors; Audio adapters, namely, plug adaptors, adaptor plugs, power adapters, and electric adaptor cables; System on a Chip (SoC); Downloadable software for audio rendering and playback; Downloadable software for rendering, processing and/or playback of spatialized audio signals; Professional cinema and studio loudspeaker systems comprising cinema signal processors for audio speakers, sound amplifiers, sound crossovers, and loudspeakers Testing of goods of others, namely, audio and video equipment for concerts and live entertainment events, laptop computers, mobile phones, smartphones, loudspeakers, soundbars, wireless speakers, tablet computers, mobile device speakers, headphones, communications network hardware devices, digital media hubs for audio and video, computers, computer monitors, audio codec signal processors, audio adapters, system on a chip (SoC), and wireless audio speaker modules; all the foregoing to assure compliance with industry standards, and consulting service relating thereto; providing temporary use of online, non-downloadable software for processing spatialized audio signals; providing temporary use of online, non-downloadable software for audio rendering and playback
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Mobile devices, namely, mobile phones, smartphones, laptop computers, wireless speakers, and tablet computers; Wireless audio speakers; Powered loudspeakers; Network hardware devices, namely, network routers, network hubs; Digital media hubs for audio and video; Wireless digital media hubs for audio and video; Computer monitors; Audio codec in the nature of signal processors; Audio adapters, namely, plug adaptors, adaptor plugs, power adapters, and electric adaptor cables; System on a Chip (SoC); Downloadable software for audio rendering and playback; Downloadable software for rendering, processing and/or playback of spatialized audio signals; Professional cinema and studio loudspeaker systems comprising cinema signal processors for audio speakers, sound amplifiers, sound crossovers, and loudspeakers Testing of goods of others, namely, audio and video equipment for concerts and live entertainment events, laptop computers, mobile phones, smartphones, loudspeakers, soundbars, wireless speakers, tablet computers, mobile device speakers, headphones, communications network hardware devices, digital media hubs for audio and video, computers, computer monitors, audio codec signal processors, audio adapters, system on a chip (SoC), and wireless audio speaker modules; all the foregoing to assure compliance with industry standards, and consulting service relating thereto; providing temporary use of online, non-downloadable software for processing spatialized audio signals; providing temporary use of online, non-downloadable software for audio rendering and playback
11.
POWER MANAGEMENT SYSTEM FOR BATTERY-POWERED AUDIO DEVICE
Embodiments provide a power management system for a battery-powered audio device. The system includes bi-directional power conversion and control circuitry to implement a corresponding control scheme. The system may be switchable between a charge mode, during which the power conversion and control circuitry charges the battery of the audio device and the AC/DC adapter provides an amplifier supply voltage to one or more amplifiers of the audio device, and a discharge mode, in which the power conversion and control circuitry may provide a regulated amplifier supply voltage to the one or more amplifiers that is regulated based on one or more operating conditions of the system. The system may provide reduced cost and reduced power consumption and reduced size compared with prior systems.
H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
H02J 7/04 - Regulation of the charging current or voltage
H02J 7/34 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
12.
POWER MANAGEMENT SYSTEM FOR BATTERY-POWERED AUDIO DEVICE
Embodiments provide a power management system for a battery-powered audio device. The system includes bi-directional power conversion and control circuitry to implement a corresponding control scheme. The system may be switchable between a charge mode, during which the power conversion and control circuitry charges the battery of the audio device and the AC/DC adapter provides an amplifier supply voltage to one or more amplifiers of the audio device, and a discharge mode, in which the power conversion and control circuitry may provide a regulated amplifier supply voltage to the one or more amplifiers that is regulated based on one or more operating conditions of the system. The system may provide reduced cost and reduced power consumption and reduced size compared with prior systems.
H02J 7/04 - Regulation of the charging current or voltage
H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
H02J 7/34 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
13.
Power management system for battery-powered audio device
Embodiments provide a power management system for a battery-powered audio device. The system includes bi-directional power conversion and control circuitry to implement a corresponding control scheme. The system may be switchable between a charge mode, during which the power conversion and control circuitry charges the battery of the audio device and the AC/DC adapter provides an amplifier supply voltage to one or more amplifiers of the audio device, and a discharge mode, in which the power conversion and control circuitry may provide a regulated amplifier supply voltage to the one or more amplifiers that is regulated based on one or more operating conditions of the system. The system may provide reduced cost and reduced power consumption and reduced size compared with prior systems.
H03F 3/217 - Class D power amplifiersSwitching amplifiers
H03F 3/185 - Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/06 - Regulation of the charging current or voltage using discharge tubes or semiconductor devices
H02J 7/04 - Regulation of the charging current or voltage
H02J 7/34 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
09 - Scientific and electric apparatus and instruments
41 - Education, entertainment, sporting and cultural services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Theater loudspeaker systems comprising main loudspeakers, surround loudspeakers, center loudspeakers, subwoofers, sound amplifiers and crossovers; motion picture theater equipment, featuring large format, wide angle, low distortion, high resolution, high image stability cinematographic projection equipment featuring movie projectors, optical lenses for movie projectors, digital media servers for movies, and hardware and recorded software for image processing; 3D movie projection systems for playing 3D movies featuring projection screens for movies, audio receivers, movie projectors, hardware and recorded software for multimedia playback, and 3D movie glasses; high dynamic range projection systems for playing high dynamic range movies featuring projection screens for movies, audio receivers, movie projectors, and hardware and recorded software for multimedia playback; digital sound processing and control systems for movie theaters, namely, systems compromised of audio processor, amplifiers, loudspeakers and audio speakers; motion picture theater sound and picture monitoring and control systems compromised of cameras, microphones and analyzers, namely, computer hardware and recorded software for analyzing and calibrating audio and video; motion picture theater network operations center and cinema operations computer hardware and recorded software for analyzing and calibrating audio and video quality for movie projectors and loudspeaker systems Movie theater services; entertainment services in the nature of cinema theater services; motion picture movie production and post production services Testing, analysis, and evaluation of motion picture theater equipment, auditorium environment, and theater projection and audio systems to determine conformity with certification standards; technical consulting in the field of electronic systems, namely, consultation services regarding motion picture theater equipment, auditorium environment, and theater projection and audio systems to determine conformity with certification standards
16.
Amplifier circuit with reduced feedforward current
An amplifier circuit that includes a first amplifier that has a first input that receives an input signal, a second input and an output. The amplifier circuit also includes a second amplifier that has a first input that is coupled to the output of said the amplifier and a second input. The circuit further includes a first impedance network Z1, a second impedance network Z2, a third impedance network Z3 and a fourth impedance network Z4. The first impedance network Z1 is coupled to a load and the second input of the second amplifier, the second impedance Z2 is connected the output of the first amplifier and the second input of the first amplifier, the third impedance Z3 is connected to the output of the first amplifier and the load, the fourth impedance Z4 is connected the output of the second amplifier and the second input of said first amplifier.
A narrow-profile balanced subwoofer or similar speaker includes a number of drivers placed side by side in the same lateral plane, with a first set of drivers facing one direction and second set of drivers facing the opposite direction. Their orientation is such that the sum of the forces from the first set of drivers is equal and opposite the sum of the forces from the second set of drivers, thus cancelling, and the sum of the moments from all of the drivers about a center or pivot point substantially equals zero. The speaker may include three or more drivers, symmetrically or asymmetrically spaced. The drivers may be of the same or different sizes, and the audio signal amplitudes may be adjusted to help balance the speaker. Each set of drivers may output sound into separate sound ducts, which may output sound from one or more apertures.
H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
A power supply that includes a first current generator circuit that is coupled to a first transformer and generates a first waveform and a second current generator circuit that is coupled to a second transformer, and generates a second waveform that is out of phase with the first waveform. The first and second waveforms are rectified and combined into a DC output signal. The power supply includes a first coupling circuit that couples the first current generator circuit to the first transformer and a second coupling circuit that couples the second current generator circuit to the second transformer.
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 7/06 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
H02M 3/337 - 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 in push-pull configuration
A power supply that includes a first current generator circuit that is coupled to a first transformer and generates a first waveform and a second current generator circuit that is coupled to a second transformer, and generates a second waveform that is out of phase with the first waveform. The first and second waveforms are rectified and combined into a DC output signal. The power supply includes a first coupling circuit that couples the first current generator circuit to the first transformer and a second coupling circuit that couples the second current generator circuit to the second transformer.
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 3/337 - 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 in push-pull configuration
A narrow-profile balanced subwoofer or similar speaker includes a number of drivers placed side by side in the same lateral plane, with a first set of drivers facing one direction and second set of drivers facing the opposite direction. Their orientation is such that the sum of the forces from the first set of drivers is equal and opposite the sum of the forces from the second set of drivers, thus cancelling, and the sum of the moments from all of the drivers about a center or pivot point substantially equals zero. The speaker may include three or more drivers, symmetrically or asymmetrically spaced. The drivers may be of the same or different sizes, and the audio signal amplitudes may be adjusted to help balance the speaker. Each set of drivers may output sound into separate sound ducts, which may output sound from one or more apertures.
H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
H04R 5/02 - Spatial or constructional arrangements of loudspeakers
21.
TRACKING POWER SUPPLY WITH INCREASED BOOST CAPABILITY
A tracking power supply for one or more amplifiers includes one or more cascaded sets of power boost circuits to temporarily boost the positive and/or negative power supply rail, respectively. Each power boost circuit may include a gain element and an energy source such as a capacitor or battery, and the power boost circuits are linked to provide a greater degree of voltage boost when needed. An optional control circuit monitors amplifier output signal levels, or separately amplified input signal levels, and provides power boost control signals to the power boost circuits, which temporarily raise or lower the positive and/or negative supply voltages above or below the nominal voltage rails in tandem with the highest and lowest output signals, respectively, from the amplifier(s).
A narrow-profile balanced subwoofer or similar speaker includes a number of drivers placed side by side in the same lateral plane, with a first set of drivers facing one direction and second set of drivers facing the opposite direction. Their orientation is such that the sum of the forces from the first set of drivers is equal and opposite the sum of the forces from the second set of drivers, thus cancelling, and the sum of the moments from all of the drivers about a center or pivot point substantially equals zero. The speaker may include three or more drivers, symmetrically or asymmetrically spaced. The drivers may be of the same or different sizes, and the audio signal amplitudes may be adjusted to help balance the speaker. Each set of drivers may output sound into separate sound ducts, which may output sound from one or more apertures.
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
H04R 5/02 - Spatial or constructional arrangements of loudspeakers
H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
23.
METHOD AND SYSTEM FOR MODIFYING A SOUND FIELD AT SPECIFIED POSITIONS WITHIN A GIVEN LISTENING SPACE
An audio system provides modified audio signals for acoustic output sources (speakers) disposed around a listening area. A sound allocation processor receives an audio source signal. A plurality of audio modifying elements, each of which may comprise one or more custom filters, operate separately on the audio source signal and provide a custom output signal for each acoustic output source. The audio modifying elements may modify a gain and/or a phase characteristic of the audio source signal independently for each acoustic output source in order to create a substantially uniform sound level or desired sound field pattern over the listening area or within defined zones within the listening area. A global equalization adjustment may also be applied. Search algorithms may be used to arrive at appropriate parameters for the audio modifying elements.
A tracking power supply for one or more amplifiers includes one or more cascaded sets of power boost circuits to temporarily boost the positive and/or negative power supply rail, respectively. Each power boost circuit may include a gain element and an energy source such as a capacitor or battery, and the power boost circuits are linked to provide a greater degree of voltage boost when needed. An optional control circuit monitors amplifier output signal levels, or separately amplified input signal levels, and provides power boost control signals to the power boost circuits, which temporarily raise or lower the positive and/or negative supply voltages above or below the nominal voltage rails in tandem with the highest and lowest output signals, respectively, from the amplifier(s).
A low dissipation, low distortion amplifier includes a driver amplifier stage and a main output stage, with a plurality of impedance networks providing, among other things, feedback paths from outputs of the driver and main output stages to the input of the driver stage. The impedance networks also provide coupling paths from the outputs of the driver and main output stages to the load. The impedance networks can all be formed of resistors, capacitors, or network combinations thereof. An additional feedback path can be added from the load to the driver stage to flatten out the frequency response at low frequencies. The driver and main output stages may be operated in Class AB and B modes respectively, and/or in Class G or H modes. An intermediate amplifier driver stage may be added between the driver and main output stages.
An earphone device comprises an inner casing enclosing one or more miniature drive units, and a movable cap or outer casing that moves relative to the inner casing. The inner casing has an extension member, such as a hollow post, terminating in an acoustic output port. A compressible foam bulb at least partially surrounds the extension member, and is decompressed and compressed by actuation of an adjustable member. The adjustable member may take the form, for example, of a pivoting lever, a helical cam, or a push-rod mechanism, among other things. A flange may be disposed around the periphery of the movable cap, in order to provide a seal surrounding the ear canal region. The compressible material may be gripped by the hollow extension member, and abut the movable cap or flange. Through actuation of the adjustable member, the compressible material may be decompressed and thus elongated for insertion into the wearer's ear, and may be compressed and thus widened or expanded to form an adequate seal with the wearer's ear canal region.
A power supply includes two or more input waveforms being shaped or selected so that after being separately level-shifted and rectified, their additive combination results in a DC output waveform with substantially no ripple. The power supply may comprise a waveform generator, a level conversion stage for step up or down conversion, a rectification stage, and a combiner. The waveform generator may generate complementary waveforms, preferably identical but phase offset from each other, such that after the complementary waveforms are level-converted, rectified and additively combined their sum will be constant, thus requiring no or minimal smoothing for generation of a DC output waveform. The level conversion may be carried out using transformers or switched capacitor circuits. Feedback from the DC output waveform may be used to adjust the characteristics of the input waveforms.
H02M 7/08 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
H02M 3/22 - Conversion of DC power input into DC power output with intermediate conversion into AC
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
H02M 7/10 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in series, e.g. for multiplication of voltage
28.
Method and system for providing access to image system services
A method and system according to the disclosure facilitates subscription based access to services for image systems including an image acquisition device configured to generate image data describing a target object in a target area of the image acquisition device and an image display device configured to generate a human perceptible rendering of the target object based on the image data.
A dynamic power supply for N amplifiers includes first and second power boost circuits which temporarily boost the positive or negative power supply rail, respectively. A control circuit monitors amplifier output signal levels and provides power boost control signals to the power boost circuits, which temporarily raise the positive supply voltage above the nominal voltage level in tandem with the highest output signal from the N amplifiers and lower the negative supply voltage below the nominal voltage level in tandem with the lowest output signal level from the N amplifiers. The power boost circuits each may be coupled to a reservoir capacitor from which current is drawn to provide the power boost. When inactive, the reservoir capacitors charge up from the respective power supply rails. The dynamic power supply is well suited for audio amplification systems.
A sound reproduction system includes one or more arrays of drive units, coupled with sound processing allowing improved steerability, directional control, width control, and/or beam overlay. A speaker column may comprise two arrays facing one another, the drive units being perpendicular to the speaker unit front, with the acoustic output of each line array being compressed, turned and output from an elongate slot. The drive units may be staggered with respect to those in the opposing array. The arrays may be arc-shaped else straight. Selective delays to simulate an arced pattern. Differential delays applied to the drive units in a sub-array allow beam steering. Additional drive units, such as high frequency drivers, may be added along the length of the elongate slot or elsewhere to increase the dynamic frequency range of the speaker system. A collocated sound processor and amplifier output stage may be integrated with the speaker unit.
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
H03G 3/00 - Gain control in amplifiers or frequency changers
H04R 1/26 - Spatial arrangement of separate transducers responsive to two or more frequency ranges
H04R 3/12 - Circuits for transducers for distributing signals to two or more loudspeakers
A method and system according to the disclosure facilitates subscription based access to services for image systems including an image acquisition device configured to generate image data describing a target object in a target area of the image acquisition device and an image display device configured to generate a human perceptible rendering of the target object based on the image data.
A low dissipation, low distortion amplifier includes a driver amplifier stage and a main output stage, with a plurality of impedance networks providing, among other things, feedback paths from outputs of the driver and main output stages to the input of the driver stage. The impedance networks also provide coupling paths from the outputs of the driver and main output stages to the load. The impedance networks can all be formed of resistors, capacitors, or network combinations thereof. An additional feedback path can be added from the load to the driver stage to flatten out the frequency response at low frequencies. The driver and main output stages may be operated in Class AB and B modes respectively, and/or in Class G or H modes. An intermediate amplifier driver stage may be added between the driver and main output stages.
H03F 1/24 - Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively in discharge-tube amplifiers
33.
Electronic adapter unit for selectively modifying audio or video data for use with an output device
A standalone or integrated electronic unit for selectively modifying audio or video data for use with an output device. The electronic unit has one or more audio or video inputs and one or more audio or video outputs for outputting the modified audio or video source material. The unit may include sensors, selectors, and/or logic for selecting from among a plurality of modification profiles and applies the selected profile to the audio or video source material before conveying it to the output device. The modification profile may be used to adapt an audio or video source for a specific type of audio or video playback or output device. For audio, the modification profile may be used to modify audio quality by altering the transfer function, and for video, the modification profile may be used to modify video quality by altering the visual characteristics of the video source signal.
A standalone or integrated electronic unit for selectively modifying audio or video data for use with an output device. The electronic unit has one or more audio or video inputs and one or more audio or video outputs for outputting the modified audio or video source material. The unit may include sensors, selectors, and/or logic for selecting from among a plurality of modification profiles and applies the selected profile to the audio or video source material before conveying it to the output device. The modification profile may be used to adapt an audio or video source for a specific type of audio or video playback or output device. For audio, the modification profile may be used to modify audio quality by altering the transfer function, and for video, the modification profile may be used to modify video quality by altering the visual characteristics of the video source signal.
A power supply includes two or more input waveforms being shaped or selected so that after being separately level-shifted and rectified, their additive combination results in a DC output waveform with substantially no ripple. The power supply may comprise a waveform generator, a level conversion stage for step up or down conversion, a rectification stage, and a combiner. The waveform generator may generate complementary waveforms, preferably identical but phase offset from each other, such that after the complementary waveforms are level-converted, rectified and additively combined their sum will be constant, thus requiring no or minimal smoothing for generation of a DC output waveform. The level conversion may be carried out using transformers or switched capacitor circuits. Feedback from the DC output waveform may be used to adjust the characteristics of the input waveforms.
A dynamic power supply for N amplifiers includes first and second power boost circuits which temporarily boost the positive or negative power supply rail, respectively. A control circuit monitors amplifier output signal levels and provides power boost control signals to the power boost circuits, which temporarily raise the positive supply voltage above the nominal voltage level in tandem with the highest output signal from the N amplifiers and lower the negative supply voltage below the nominal voltage level in tandem with the lowest output signal level from the N amplifiers. The power boost circuits each may be coupled to a reservoir capacitor from which current is drawn to provide the power boost. When inactive, the reservoir capacitors charge up from the respective power supply rails. The dynamic power supply is well suited for audio amplification systems.
A power supply includes two or more input waveforms being shaped or selected so that after being separately level-shifted and rectified, their additive combination results in a DC output waveform with substantially no ripple. The power supply may comprise a waveform generator, a level conversion stage for step up or down conversion, a rectification stage, and a combiner. The waveform generator may generate complementary waveforms, preferably identical but phase offset from each other, such that after the complementary waveforms are level-converted, rectified and additively combined their sum will be constant, thus requiring no or minimal smoothing for generation of a DC output waveform. The level conversion may be carried out using transformers or switched capacitor circuits. Feedback from the DC output waveform may be used to adjust the characteristics of the input waveforms.
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
H02M 7/10 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in series, e.g. for multiplication of voltage
A low dissipation, low distortion amplifier includes a driver amplifier stage and a main output stage, with a plurality of impedance networks providing, among other things, feedback paths from outputs of the driver and main output stages to the input of the driver stage. The impedance networks also provide coupling paths from the outputs of the driver and main output stages to the load. The impedance networks can all be formed of resistors, capacitors, or network combinations thereof. An additional feedback path can be added from the load to the driver stage to flatten out the frequency response at low frequencies. The driver and main output stages may be operated in Class AB and B modes respectively, and/or in Class G or H modes. An intermediate amplifier driver stage may be added between the driver and main output stages.
A low dissipation, low distortion amplifier includes a driver amplifier stage and a main output stage, with a plurality of impedance networks providing, among other things, feedback paths from outputs of the driver and main output stages to the input of the driver stage. The impedance networks also provide coupling paths from the outputs of the driver and main output stages to the load. The impedance networks can all be formed of resistors, capacitors, or network combinations thereof. An additional feedback path can be added from the load to the driver stage to flatten out the frequency response at low frequencies. The driver and main output stages may be operated in Class AB and B modes respectively, and/or in Class G or H modes. An intermediate amplifier driver stage may be added between the driver and main output stages.
A low dissipation, low distortion amplifier includes a driver amplifier stage and a main output stage, with a plurality of impedance networks providing, among other things, feedback paths from outputs of the driver and main output stages to the input of the driver stage. The impedance networks also provide coupling paths from the outputs of the driver and main output stages to the load. The impedance networks can all be formed of resistors, capacitors, or network combinations thereof. An additional feedback path can be added from the load to the driver stage to flatten out the frequency response at low frequencies. The driver and main output stages may be operated in Class AB and B modes respectively, and/or in Class G or H modes. An intermediate amplifier driver stage may be added between the driver and main output stages.
H03F 1/24 - Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively in discharge-tube amplifiers
An earphone device comprises an inner casing enclosing one or more miniature drive units, and a movable cap or outer casing that moves relative to the inner casing. The inner casing has an extension member, such as a hollow post, terminating in an acoustic output port. A compressible foam bulb at least partially surrounds the extension member, and is decompressed and compressed by actuation of an adjustable member. The adjustable member may take the form, for example, of a pivoting lever, a helical cam, or a push-rod mechanism, among other things. A flange may be disposed around the periphery of the movable cap, in order to provide a seal surrounding the ear canal region.. The compressible material may be gripped by the hollow extension member, and abut the movable cap or flange. Through actuation of the adjustable memer, the compresible material may be decompressed and thus elongated for insertion into the wearer's ear, and may be compressed and thus widened or expanded to form an adequate seal with the wearer's ear canal region.
A dynamic power supply for N amplifiers includes first and second power boost circuits which temporarily boost the positive or negative power supply rail, respectively. A control circuit monitors amplifier output signal levels and provides power boost control signals to the power boost circuits, which temporarily raise the positive supply voltage above the nominal voltage level in tandem with the highest output signal from the N amplifiers and lower the negative supply voltage below the nominal voltage level in tandem with the lowest output signal level from the N amplifiers. The power boost circuits each may be coupled to a reservoir capacitor from which current is drawn to provide the power boost. When inactive, the reservoir capacitors charge up from the respective power supply rails. The dynamic power supply is well suited for audio amplification systems.
An earphone device comprises an inner casing enclosing one or more miniature drive units, and a movable cap or outer casing that moves relative to the inner casing. The inner casing has an extension member, such as a hollow post, terminating in an acoustic output port. A compressible foam bulb at least partially surrounds the extension member, and is decompressed and compressed by actuation of an adjustable member. The adjustable member may take the form, for example, of a pivoting lever, a helical cam, or a push-rod mechanism, among other things. A flange may be disposed around the periphery of the movable cap, in order to provide a seal surrounding the ear canal region. The compressible material may be gripped by the hollow extension member, and abut the movable cap or flange. Through actuation of the adjustable member, the compressible material may be decompressed and thus elongated for insertion into the wearer's ear, and may be compressed and thus widened or expanded to form an adequate seal with the wearer's ear canal region.
A sound reproduction system includes one or more arrays of drive units, coupled with sound processing allowing improved steerability, directional control, width control, and/or beam overlay. A speaker column may comprise two arrays facing one another, the drive units being perpendicular to the speaker unit front, with the acoustic output of each line array being compressed, turned and output from an elongate slot. The drive units may be staggered with respect to those in the opposing array. The arrays may be arc-shaped else straight. Selective delays to simulate an arced pattern. Differential delays applied to the drive units in a sub-array allow beam steering. Additional drive units, such as high frequency drivers, may be added along the length of the elongate slot or elsewhere to increase the dynamic frequency range of the speaker system. A collocated sound processor and amplifier output stage may be integrated with the speaker unit.
H04R 1/26 - Spatial arrangement of separate transducers responsive to two or more frequency ranges
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
H04R 1/22 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
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
45.
Loudspeaker line array configurations and related sound processing
A sound reproduction system includes one or more arrays of drive units, coupled with sound processing allowing improved steerability, directional control, width control, and/or beam overlay. A speaker column may comprise two arrays facing one another, the drive units being perpendicular to the speaker unit front, with the acoustic output of each line array being compressed, turned and output from an elongate slot. The drive units may be staggered with respect to those in the opposing array. The arrays may be arc-shaped else straight. Selective delays to simulate an arced pattern. Differential delays applied to the drive units in a sub-array allow beam steering. Additional drive units, such as high frequency drivers, may be added along the length of the elongate slot or elsewhere to increase the dynamic frequency range of the speaker system. A collocated sound processor and amplifier output stage may be integrated with the speaker unit.
09 - Scientific and electric apparatus and instruments
Goods & Services
Headphones; set top boxes; video displays, namely, flat panel display screens; stereoscopic 3D displays, namely, flat panel, plasma, LCD and LED displays; projectors, namely, LCD projectors, movie projectors, L-COS projectors, digital video projectors
09 - Scientific and electric apparatus and instruments
Goods & Services
Video displays, namely, high-definition DVD player displays, namely, flat panel, plasma, LCD and LED displays, external displays for use with game consoles, namely, flat panel, plasma, LCD and LED displays
09 - Scientific and electric apparatus and instruments
Goods & Services
Video displays, namely, high-definition DVD player displays, namely, flat panel, plasma, LCD and LED displays, external displays for use with game consoles, namely, flat panel, plasma, LCD and LED displays
09 - Scientific and electric apparatus and instruments
Goods & Services
Headphones; set top boxes; video displays, namely, flat panel display screens; stereoscopic 3D displays, namely, flat panel, plasma, LCD and LED displays; projectors, namely, LCD projectors, movie projectors, L-COS projectors, digital video projectors
A constant balance volume control according to the present disclosure may provide a user with the ability to listen to program material originally mixed at a known “reference” level at any other suitable level without experiencing a substantial shift in tonal balance. A constant balance volume control may include two 2nd order biquad filters that are controlled in a continuous manner by the volume control of a system. The filters could be implemented in analog or digital form.
A dynamic surround channel volume control applies a variable gain control to the surround channels of a multi-channel system. Thus the levels of the surround channels are related to the main volume control of the system. This maintains a predictable relationship between the surround channels and the main or front channels.
A constant balance volume control according to the present disclosure may provide a user with the ability to listen to program material originally mixed at a known 'reference' level at any other suitable level without experiencing a substantial shift in tonal balance. A constant balance volume control may include two 2nd order biquad filters that are controlled in a continuous manner by the volume control of a system. The filters could be implemented in analog or digital form.
A dynamic surround channel volume control applies a variable gain control to the surround channels of a multi-channel system. Thus the levels of the surround channels are related to the main volume control of the system. This maintains a predictable relationship between the surround channels and the main or front channels.
09 - Scientific and electric apparatus and instruments
41 - Education, entertainment, sporting and cultural services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Theater loudspeaker systems; headphones; loudspeakers.
(2) Electronic equipment for audio and audiovisual recording, display and playback, namely, televisions; sound amplifiers; receivers; stereo speakers; DVD players; CD players; audio and video interconnects; speaker cables; equalizers; projection screens; network controllers; theater projection equipment, namely film projectors and digital projectors; and automobile stereos.
(3) Videogames.
(4) Computer software and hardware for audio and audiovisual recording, display, and playback; DVDs featuring audiovisual works, namely, DVDs featuring films, entertainment videos, television programs, video games and music.
(5) Prerecorded audio and video tapes.
(6) Home loudspeaker systems.
(7) Theater loudspeaker systems comprising main loudspeakers, surround loudspeakers, center loudspeakers, subwoofers, sound amplifiers and crossovers; home loudspeaker systems comprising main loudspeakers, surround loudspeakers, center loudspeakers, subwoofers, sound amplifiers and crossovers. (1) Educational services, namely, providing training in the field of home theater sales and installation.
(2) Testing and consulting services in the field of cinema and home theater audio and audiovisual systems; testing and consulting services in the field of electronic equipment for audio and audiovisual recording, display and playback.
(3) Testing and consulting services in the field of computer software and hardware for audio and audiovisual recording, display, and playback; testing and consulting services in the field of videogames; testing and consulting services in the field of DVDs.
(4) Testing of the goods and services of others for the purposes of certification in the fields of theater loudspeaker systems, home loudspeaker systems, electronic equipment for audio and audiovisual recording, display, and playback, computer software and hardware for audio and audiovisual recording, display, and playback, video games and DVDs, and consultation services therefor.
09 - Scientific and electric apparatus and instruments
41 - Education, entertainment, sporting and cultural services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Theater loudspeaker systems.
(2) Electronic equipment for audio and audiovisual recording, display and playback, namely, televisions; sound amplifiers; receivers; stereo speakers; DVD players; CD players; audio and video interconnects; speaker cables; equalizers; projection screens; theater projection equipment, namely film projectors and digital projectors; and automobile stereos.
(3) Home loudspeaker systems.
(4) Videogames.
(5) Computer software and hardware for audio and audiovisual recording, display, and playback; DVDs featuring audiovisual works namely, DVDs featuring films, entertainment videos, television programs, video games and music.
(6) Loudspeakers.
(7) Prerecorded audio and video tapes.
(8) Headphones; network controllers.
(9) Home loudspeaker systems comprising main loudspeakers, surround loudspeakers, center loudspeakers, subwoofers, sound amplifiers and crossovers. (1) Educational services, namely providing training in the field of home theatre sales and installation.
(2) Testing and consulting services in the field of cinema and home theater audio and audiovisual systems; testing and consulting services in the field of electronic equipment for audio and audiovisual recording, display and playback.
(3) Testing and consulting services in the field of computer software and hardware for audio and audiovisual recording, display, and playback; testing and consulting services in the field of videogames; testing and consulting services in the field of DVDs.
(4) Testing of the goods and services of others for the purposes of certification in the fields of theater loudspeaker systems, home loudspeaker systems, electronic equipment for audio and audiovisual recording, display, and playback, computer software and hardware for audio and audiovisual recording, display, and playback, videogames and DVDs; and consultation services therefor.
09 - Scientific and electric apparatus and instruments
41 - Education, entertainment, sporting and cultural services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus; theater loudspeaker systems; home loudspeaker systems; electronic equipment for audio and audiovisual recording, display, and playback; computer software and hardware for audio and audiovisual recording, display, and playback; video games; hand held video game players, pre-recorded audio and video tapes, CD ROMs, loudspeakers and video game consoles, DVDs featuring audiovisual works. Education; providing of training; entertainment; sporting and cultural activities; educational services, namely, providing training in the field of home theater sales and installation. Scientific and technological services and research and design relating thereto; industrial analysis and research services; design and development of computer hardware and software; legal services; testing and consulting services in the field of cinema and home theater audio and audiovisual systems; testing and consulting services in the field of electronic equipment for audio and audiovisual recording, display, and playback; testing and consulting services in the field of computer software and hardware for audio and audiovisual recording, display, and playback; testing and consulting services in the field of video games; testing and consulting services in the field of DVDs.
09 - Scientific and electric apparatus and instruments
41 - Education, entertainment, sporting and cultural services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Home loudspeaker systems comprising main loudspeakers, surround loudspeakers, center loudspeakers, subwoofers, sound amplifiers and crossovers; televisions; sound amplifiers; receivers; stereo speakers; DVD players; [ CD players; ] audio and video interconnects; speaker cables; [ equalizers; ] projection screens; video scalars; theater projection equipment, namely, [ film projectors and ] digital projectors; automobile stereos; [ computer software and hardware for audio and audiovisual recording, display, and playback; video game discs; and ] DVDs featuring audiovisual works Educational services, namely providing training in the field of home theater sales and installation Testing of the goods and services of others for the purposes of certification in the fields of theater loudspeaker systems; home loudspeaker systems; electronic equipment for audio and audiovisual recording, display, and playback; [ computer software and hardware for audio and audiovisual recording, display, and playback; videogames and ] DVDs; and consultation services therefor
09 - Scientific and electric apparatus and instruments
41 - Education, entertainment, sporting and cultural services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Theater loudspeaker systems comprising main loudspeakers, surround loudspeakers, center loudspeakers, subwoofers, sound amplifiers and crossovers; home [ loudspeakers ] * loudspeaker * systems comprising main loudspeakers, surround loudspeakers, center loudspeakers, subwoofers, sound amplifiers and crossovers; televisions; sound amplifiers; receivers; stereo speakers; DVD players; [ CD players; ] audio and video interconnects; speaker cables; [ equalizers; ] projection screens; network controllers; theater projection equipment, namely, [ film projectors and ] digital projectors; automobile stereos; [ computer software and hardware for audio and audiovisual recording, display, and playback; video game discs; ] DVDs featuring audiovisual works Educational services, namely * , * providing training in the field of home theater sales and installation Testing of the goods and services of others for the purposes of certification in the fields of theater loudspeaker systems, home loudspeaker systems, electronic equipment for audio and audiovisual recording, display, and playback, [ computer software and hardware for audio and audiovisual recording, display, and playback, video games and ] [ DVD's ] * DVDS *, and consultation services therefor
09 - Scientific and electric apparatus and instruments
41 - Education, entertainment, sporting and cultural services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Electrical and electronic apparatus and instruments; apparatus for recording, transmission or reproduction of sound and images; electronic apparatus for home use with televisions, video players and audio visual play backs or display apparatus; electronic control apparatus; audio signal processing and decoding apparatus; loud speakers; loud speaker apparatus and instruments; theatre loud speaker systems; parts and fittings for all the above; computer software; prerecorded audio and video tapes; laser discs; CD- ROMs; DVD discs. Entertainment services; namely, motion pictures exhibition services. Providing access by means of electronic networks and other on- line means to databases, articles, computer programs, textual works, audio works, visual works, audiovisual works, and catalogs of goods for sale, in linear and interactive formats; providing access by means of electronic networks and other on-line means to information in the fields of entertainment, technology, business, applications of technology to the motion picture and television business, film and video production and editing and exhibition, and current events; technical consultancy and advising in the establishment and operation of retail store services, departments within retail department stores, mail order services and electronic retail services; on-line database access services; providing on-line access and access by means of electronic networks to electronic networks; consulting services in the field of cinema and theatre loud speaker systems.
