Video code stream transcoding method and device under same protocol type

Abstract

The embodiment of the invention provides a video code stream transcoding method and device under the same protocol type. The device comprises a decoder and an encoder. The method comprises decoding an original code stream to obtain an decoded code stream; when the encoder encodes the decoded code stream to generate an output code stream, copying the code stream parameter information of an original frame in the decoder, which corresponds to a current frame currently coded by the encoder, into the encoder, wherein the code stream parameter information contains the encoding code type, the encoding sequence and the reference frame relationship of the original frame as well as the predicating mode of every encoding block in the original frame; in the encoder, determining the code control parameters of the current frame according to a target code rate, taking the encoding frame type, the encoding sequence and the reference frame relationship of the original frame as the encoding type, the encoding sequence and the reference frame relationship of the current frame, taking the predicting mode of every encoding block in the original frame as the predicting mode of every encoding block in the current frame, and then encoding the current frame.

Description

technical field [0001] Embodiments of the present invention relate to the field of image processing, and more specifically, relate to a method and device for transcoding video code streams under the same protocol type. Background technique [0002] At present, due to the limitations of different application bandwidths, the original code stream cannot meet different bandwidths, and the original code rate needs to be converted to a new target code rate. [0003] When transcoding between code streams of the same protocol type, the existing code rate transcoding algorithm, the decoder and the encoder are independent, and the encoder multiplexes part of the information of the decoder (prediction mode in the block, block Quantized information in , etc.), and the multiplexed information cannot be used directly, and needs to be converted and mapped before it can be used. In addition, during the transcoding process, the encoder needs to perform operations such as pre-processing, ref...

AI Technical Summary

Problems solved by technology

[0004] In the existing transcoding method, due to the large amount of calculation of the encoder, the speed is much lower than that of the decoder, and there is a certain bottleneck in the conversion performance.

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