A code stream decoding method and device

Abstract

The present invention provides a stream decoding method and device.The method includes following steps:receiving the stream, the stream including the first protocol form stream or the second protocol form stream; decoding according to the decoding form of the second protocol form if judging the stream being the first protocol form stream by the stream mark and detecting the stream mark under the decoding course of the second protocol form; judging the amount of the stream marks of the first protocol form whether exceeding the preset threshold or not if judging the stream being the second protocol form stream by the stream mark and detecting the stream mark of the first protocol form in the course of decoding form of the second protocol form; if exceeding, decoding according to the first protocol form. The embodiment of the invention improves the accuracy rate of the decoding stream and ensures the decoding priority of the decoding stream.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a code stream decoding method and device. Background technique [0002] MPEG-4 (Moving Pictures Experts Group 4, the fourth generation of moving picture experts group) is a compression standard for ultra-low bit rate moving images and languages. MPEG-4 supports the Short Header format, and the Short Header format is H. 263 bit stream format, for the forward compatibility of video decoding, when formulating the MPEG-4 bit stream format, the Short Header format was added to support the H.263 bit stream format, thus introducing MPEG-4 in the decoding process The problem of switching between format code stream and Short Header format code stream. There are two kinds of switching problems: the former bit stream is in MPEG-4 bit stream format, and the second bit stream is in ShortHeader bit stream format; or the former bit stream is in Short Header bit stream format, an...

AI Technical Summary

Problems solved by technology

[0005] 2) During the transmission process, due to transmission errors, the start code is wrong, and the code stream switching occurs;

This solution will result in the inability to switch the code stream format when it actually needs to be switched, resulting in the loss of one image or even a series of images

[0010] In the process of realizing the present invention, the inventors found that the prior art has at least the following problems: in the process of decoding the code stream, the prior art cannot correctly judge the format of the code stream, which is likely to cause decoding errors, and cannot guarantee that the code that needs to be decoded first stream decoding priority

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