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A data synchronization method for mobile multimedia broadcast system

A technology for mobile multimedia and broadcasting systems, applied in the field of synchronization of service data streams in mobile multimedia broadcasting systems, can solve the problems of error diffusion, loss of data, affecting the transmission efficiency of multimedia broadcasting systems, etc., and achieve the effect of efficient transmission

Inactive Publication Date: 2008-01-09
ZTE CORP
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  • Abstract
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Problems solved by technology

[0005] In a multiplexed frame, there is no delimiter between multiplexed subframes and multiplexed subframes, and the end and start of different multiplexed subframes cannot be marked; similarly, the video segment, audio segment and There is no delimiter between the data segments to isolate, when the data flow of the multiplexed frame is transmitted in the wireless broadcast network, part of the data is lost, resulting in the data shift of the multiplexed frame; and according to the multiplexed frame header or the multiplexed subframe The length information in the header cannot accurately locate the data stream, and cannot correctly parse the data of multiplexed subframes or video segments, audio segments, and data segments, so that error isolation cannot be achieved, resulting in error diffusion, which greatly affects multimedia broadcasting System Transmission Efficiency

Method used

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  • A data synchronization method for mobile multimedia broadcast system

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Embodiment 1

[0032] Embodiment 1, a method for synchronizing service data streams in a mobile multimedia broadcasting system, comprising the following steps:

[0033] Step 1: when generating the multiplexing frame, add the first separator at the end of the multiplexing subframe video segment according to the multiplexing frame structure defined by the mobile multimedia broadcasting standard; add the second separator at the end of the multiplexing subframe audio segment; A third delimiter is added to the end of the multiplexing subframe data segment;

[0034] Wherein, the first delimiter is used to indicate the end of the video segment and the beginning of the audio segment, thereby realizing the service data synchronization of the video segment; the second delimiter is used to indicate the end of the audio segment and the beginning of the data segment, thereby realizing the service of the audio segment Data synchronization: using the third delimiter can indicate the end of the data segment...

Embodiment 2

[0040] In the second embodiment, on the basis of the above-mentioned embodiments, various delimiters are specifically realized by corresponding media units (video, audio and data units).

[0041] A method for synchronizing service data streams in a mobile multimedia broadcasting system, comprising the following steps:

[0042] Step 1: when generating the multiplexing frame, add the first separator at the end of the multiplexing subframe video segment according to the multiplexing frame structure defined by the mobile multimedia broadcasting standard; add the second separator at the end of the multiplexing subframe audio segment; A third delimiter is added to the end of the multiplexing subframe data segment;

[0043] Wherein, only one of the first delimiter, the second delimiter and the third delimiter may be used according to the situation, or a combination of these three may be used according to the situation.

[0044] Step 2: In order to keep compatibility with the existin...

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Abstract

The method comprises: a) when generating the multiplexing frame, adding a separator into the media segment tail of each multiplexing subframe, and making the encapsulation for it; b) transmitting the generated multiplexing frame; when the mobile multimedia broadcast has a transmission error, the receiving end uses the separator to extract the service data stream of the media segment in order to make the fault-tolerant treatment.

Description

technical field [0001] The invention relates to the technical field of mobile multimedia broadcasting, in particular to a method for synchronizing service data streams in a mobile multimedia broadcasting system. Background technique [0002] Mobile multimedia broadcasting is a broadcasting multimedia playing technology emerging in recent years. Through the hand-held terminal, in the case of high-speed movement, you can watch multimedia services such as TV. The terminal receives the multimedia service program list through the wireless broadcast channel, and can select the channel it has the right to watch, and accept the multimedia data of the selected channel, so as to realize watching TV on the mobile terminal. [0003] At present, most mobile multimedia broadcasting systems use the MPEG2 transmission stream mode to realize data stream synchronization, which is a fixed-length transmission mode; its first byte is fixed, so as to achieve the purpose of data stream synchroniz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/52H04N7/62
Inventor 谢大雄王标晏祥彪
Owner ZTE CORP
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