Encoding end processing method, decoding end processing method and method for preventing pseudo start code

Abstract

The invention provides a coding end processing method, a decoding end processing method and a method for preventing a pseudo start code. Temporary length information is inserted during encoding, and position information of an initial code prefix is recorded; the initial code prefix is deleted so that the formed new data block does not have the pseudo initial code prefix; According to the method, the required data block is recovered through the length information in the decoding process, the false start code can be rapidly prevented, the length of the current data block can be obtained, the anti-counterfeiting start code operation is completed with the minimum calculation amount in the decoding process, decoding can be started in time when one data block is aligned, and the next start codedoes not need to be waited.

Description

technical field [0001] The invention relates to the technical field of encoding and decoding of video data streams, in particular to an encoding end processing method, a decoding end processing method and a method for preventing false start codes. Background technique [0002] Traditional video coding standards such as H.261, H.263, H.263+, H.264 standards developed by ITU (International Telecommunication Union, International Telecommunication Union) and MPEG (Moving Pictures Experts Group, MPEG-1, MPEG-2, MPEG-4, etc. formulated by the Pictures Experts Group, etc. all require encoders to organize audio and video encoded data blocks into random access data streams, so that the decoder can start from the set random Decoding starts at the access point. In the above standards, random access to coded data is realized through start codes, such as video sequence start codes, picture group start codes, picture start codes, and so on. These start codes are composed of two parts: s...

AI Technical Summary

Problems solved by technology

The above-mentioned method for setting prohibited values ​​and mask bits has the following disadvantages: a. increases the complexity of grammar design

When designing the grammatical structure, it is necessary to always consider whether there will be a pseudo-start code, whether some values ​​need to be prohibited, and whether a mask bit needs to be inserted; b. The legibility of the grammatical structure is reduced. Elements are mixed in the grammatical structure, which makes it difficult for people to grasp the main points; c. The efficiency is not high, and measures must be taken where false start codes are likely to be generated, regardless of whether the specific value of the grammatical element will actually produce false starts start code

[0005] The above-mentioned anti-counterfeiting start code method has the following problems: (1) the start code must be continuously searched in the received code stream during decoding, and the calculation amount is relatively large; (2) the next start code must be received to determine a end of block

Images