Abstract

The invention relates, according to a first aspect, to a method of anti-loss protection in a terminal capable of receiving data flow transmitted in the form of bursts by means of at least one first channel and one second channel, and is characterized in that direct error correction is implemented based on union of a burst received from the first channel with the same burst received from the second channel. The invention also applies to a terminal and an electronic component for implementing the method according to the first aspect of the invention.

IPC Classes  ?

• H04L 1/06 - Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
• H04B 7/08 - Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
• H04B 7/185 - Space-based or airborne stations

Abstract

According to a first aspect, the invention relates to a method for adapting a data flow for the isochronous distribution thereof by a transmitter network operating at a single frequency, that comprises: cutting the data flow into a plurality of megaframes and inserting into each megaframe an initialisation packet to be used by the transmitters for synchronising the distribution of the data flow, the initialisation packet of a megaframe including a field STS for indicating the beginning of the transmission of the next megaframe to the transmitters; evaluating for each megaframe the beginning of the transmission of the next megaframe relative to a time reference not in high resolution and including an imprecision; characterised in that it comprises for each megaframe applying a correction to the evaluation of the beginning of the transmission of the next megaframe for delaying said evaluation of the imprecision of the time reference, and filling the STS and maximum_delay fields of the megaframe while taking into account the corrected evaluation. The invention also relates to a device including means for implementing the method.

IPC Classes  ?

• H04J 3/06 - Synchronising arrangements
• G06F 1/14 - Time supervision arrangements, e.g. real time clock
• H04L 27/26 - Systems using multi-frequency codes
• H04H 20/18 - Arrangements for synchronising broadcast or distribution via plural systems
• H04H 20/67 - Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency

Abstract

The invention relates to a method, and a device configured to implement the method, of transmitting a stream of data comprising a plurality of individual streams (ES) subdivided in time to be transmitted in the form of bursts, at least one time indicator (delta-t) indicating in a burst of an individual stream the starting time of the next burst of the same individual stream, the method comprising steps according to which: at the latest on transmitting a burst (Bi,j), a prediction is made as to the starting time (ti,j,+1) of the next burst (Bi,j+1) of the same individual stream (ESi), and the time indicator of the burst (Bi,J) is entered as a function of the starting time predicted for the next burst (Bi,j+1), at the predicted starting time (ti,j+1), the start of the transmission of the next burst is forced, and if a burst (Bk,j) of another individual stream (ESk) is then currently being transmitted, said next burst (Bi,j,+1) is transmitted multiplexed with said burst (BkJ) of another individual stream (ESk) currently being transmitted.

IPC Classes  ?

• H04H 20/28 - Arrangements for simultaneous broadcast of plural pieces of information

Abstract

According to a first aspect, the invention relates to a method for protection against errors in a transmission system in which a data flow includes a plurality of time-divided base flows to be transmitted as bursts, characterised in that it comprises, for one base flow, calculating a direct inter-burst error correction, and associating the calculated correction with bursts of the flow in order to provide a protection against the total or partial loss of one or more bursts of the flow.

IPC Classes  ?

• H04L 1/00 - Arrangements for detecting or preventing errors in the information received

Abstract

Data flow emission method for a transmission according to a layered architecture protocol, according to which the transmitted messages are fragmented as a function of the maximum length imposed by the different layers, and according to which the datagrams carrying fragments are transmitted by bursts. The bursts are constructed by analyzing and associating datagrams originating from flows of different types in the following way: for each of the different datagrams the flow to which it belongs is determined as well as the homogenous or heterogeneous nature of this flow; datagrams pertaining to a same flow are encapsulated in a same burst; by starting, when this flow is homogenous, by an INPUT datagram containing the beginning of an application PDU; and when the flow is heterogeneous, by starting by an INPUT datagram containing a principal frame and completing by one or more INPUT datagrams containing secondary frames.

IPC Classes  ?

• H04L 29/06 - Communication control; Communication processing characterised by a protocol

Abstract

According to a first aspect, the invention proposes a method for processing a transport stream (TS) received as an input transport stream in a processing device (SDR), the transport stream comprising a plurality of elementary streams (ES), each elementary stream (ES) being a set of transport stream packets having the same Packet IDentifier (PID), at least one of these elementary streams being time-sliced so as to be sent in bursts, timing information indicating within a burst the time to the beginning of the next burst, characterized in that it comprises the steps of: applying a filtering operation to the input transport stream so as to filter out from the input transport stream part or all of one or more time- sliced elementary streams; modifying the bursts scheduling of the input transport stream so as to generate a DVB-H compliant output transport stream from the filtered input transport stream. The invention also relates to a device for processing a transport stream comprising a plurality of time-sliced elementary streams, said device means for performing the method according to the first aspect of the invention, and to a transport stream carrying in-band configuration messages intended to be interpreted by the device for determination of the filtering operation to be applied to the input transport stream.

IPC Classes  ?

• H04H 20/42 - Arrangements for resource management
• H04H 60/07 - Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linkage to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
• H04H 20/06 - Arrangements for relaying broadcast information among broadcast stations

Abstract

The invention concerns a system for converting digital video broadcast data into a form adapted to their reception by one or more wired or radio receivers comprising: means for receiving digital video broadcast data consisting of elementary streams and signaling data; means for identifying which elementary streams are required by one or more wired or radio receivers; means for detecting and extracting the signaling data and any of the required elementary streams of received digital video broadcast data; and means for dynamically transmitting the extracted elementary streams to the wired or radio receivers.

IPC Classes  ?

• H04L 12/18 - Arrangements for providing special services to substations for broadcast or conference
• H04L 29/06 - Communication control; Communication processing characterised by a protocol

Abstract

The invention concerns a method and a device for transmitting traffic in a QoS environment including the following steps: a) classifying the traffic according to its DSCP IP address or field; and b) transmitting the traffic multiplexed by multiplexing or continuous multiplexing depending on its classification.

IPC Classes  ?

• H04L 12/56 - Packet switching systems
• H04W 4/06 - Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• H04W 52/02 - Power saving arrangements