Method for spreading digital audio and video parameter set

Abstract

The invention discloses a method for transmitting a digital audio-video parameter set. The method comprises the following steps: in the process of sending each received circuit of an audio-video code stream by the broadcast sending end, the parameter set and corresponding audio-video data are separated; and before the audio-video data with the same parameter set is sent in each multiplexing subframe, the same parameter set is sent to the broadcast receiving end. The same parameter set is multiplexed in a multiplexing block or an audio-video data unit; and if the parameter set is changed compared with the prior parameter set, the changed same parameter set is sent to the broadcast receiving end to indicate that the parameter set is changed. The method is applied to avoid repeated transmission of the same parameter set, can effectively utilize bandwidth, well solve the problem of real-time parameter transmission, can rapidly and randomly access a user and bring no extra influence on a continuously-watching user.

Description

A Method of Propagating Digital Audio-Video Parameter Set technical field The invention relates to the technical field of digital broadcasting communication, in particular to a method for realizing the transmission of digital audio and video parameter sets. Background technique With the development of multimedia communication technology, more application requirements are put forward for the transmission of digital audio and video data. For example, the use of broadcasting technology to achieve real-time audio and video transmission, real-time playback and other application requirements. At present, when many kinds of audio and video coding algorithms realize audio and video transmission, the decoding end must obtain the necessary parameters before receiving the code stream before decoding. This part of the parameters is called "parameter set", which requires the encoding end to need Send the parameter set to the decoding end in real time through some means. In the prior...

AI Technical Summary

Problems solved by technology

Because the parameters of one channel of encoding generally remain unchanged, the repeated transmission of audio and video parameter sets in the prior art will inevitably result in redundant bandwidth occupation

(2) Out-of-band transmission: Encode the audio and video parameters separately, and use the control channel or other bearer methods such as ESG (Electronic Service Guide) for out-of-band transmission, because the transmission is carried out on a different channel from the code stream, and the audio or video parameters are transmitted It is difficult to guarantee the real-time performance, especially when the parameters change, it is even more difficult to guarantee the synchronization

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