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Coding and decoding methods, equipment and system of intra-frame chroma prediction modes

An intra-frame prediction mode and chrominance component technology, applied in the field of codec, can solve problems such as limiting decoding throughput, and achieve the effect of improving throughput

Active Publication Date: 2013-10-23
HUAWEI TECH CO LTD
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Problems solved by technology

[0003] However, the existing coding method of the intra prediction mode of the chroma component limits the throughput of the decoding (throughput)

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  • Coding and decoding methods, equipment and system of intra-frame chroma prediction modes

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[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0038] The basic principle of video coding and compression is to use the correlation between space domain, time domain and code words to remove redundancy as much as possible. The current popular approach is to use a block-based hybrid video coding framework to achieve video coding compression through steps such as prediction (including intra-fram...

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Abstract

The invention provides coding and decoding methods, equipment and a system of intra-frame chroma prediction modes. According to the invention, intra-frame prediction modes of an intra-frame prediction mode set which is suitable for the chroma of a current block are divided into a first subgroup and a second subgroup, the amount of the intra-frame predication modes in correspondence with the first subgroup is at least two, and the amount of the intra-frame predication modes in correspondence with the second subgroup is 2<N>, wherein N is a positive integer. Due to the fact that the most required coded bit number is lower than that in the prior art, decoding throughput can be improved.

Description

technical field [0001] The present invention relates to encoding and decoding technology, and in particular to an encoding and decoding method, device and system of an intra-frame prediction mode of a chrominance component. Background technique [0002] In the existing video image coding and decoding technology, in order to improve the coding efficiency of I frame, H.264 standard, Advanced Video Coding (Advanced Video Coding, AVC for short) standard, High Efficiency Video Coding (High Efficiency Video Coding, HEVC for short) ) standard and other video coding standards have introduced multi-mode intra-frame prediction coding and decoding technology. For example: in the HEVC standard, there are 6 types of intra prediction modes for the chroma component (CH ROMA), which are Derived Mode (DM for short) (that is, the frame of the luminance component that has been coded / decoded in the current block Intra prediction mode), linear model (Linear Model, LM for short) mode (that is, p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32
Inventor 林永兵
Owner HUAWEI TECH CO LTD
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