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A rate-distortion optimized quantization method for high-efficiency video coding

A high-efficiency video coding and rate-distortion optimization technology, applied in digital video signal modification, image communication, electrical components, etc., can solve problems such as inability to parallelize and complex RDOQ process

Active Publication Date: 2020-10-27
SHANGHAI FULLHAN MICROELECTRONICS
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Problems solved by technology

[0043] The RDOQ process in HM is quite complicated and needs to be performed sequentially in 4 steps
In particular, the four steps require repeated scan coefficients to be estimated at an update rate, which cannot be parallelized, which is not conducive to implementing an RDOQ hardware module with acceptable throughput.

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  • A rate-distortion optimized quantization method for high-efficiency video coding
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  • A rate-distortion optimized quantization method for high-efficiency video coding

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Embodiment Construction

[0102] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0103] In the present invention, the sub-blocks whose coefficients are all 0 after quantization are called all-0 sub-blocks, and other cases are called non-all-zero sub-blocks. A plurality of continuous coefficients in the scanning order are called paths, and the path part inside the sub-block is called a sub-path, then the present invention decomposes the RDOQ problem into two parts: the op...

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Abstract

The invention discloses an efficient video coding rate distortion optimization and quantization method. The method comprises the following steps: a TB to be processed is divided into sub-blocks, a plurality of coefficients consecutive in the scanning sequence are called a path, path portions in the sub-blocks are called sub-paths, the rate distortion optimization and quantization method is converted into optimal path search in the TB and optimal path search in the sub-paths, the target of the optimal path search is to find a legal path with the lowest measurement, and the measurement of the path is the Lagrangian cost of the path. The efficient video coding rate distortion optimization and quantization method disclosed by the invention is easier to implement on hardware, can be matched with accurate code rate estimation, and has a fixed delay and reasonable throughput.

Description

technical field [0001] The invention relates to the field of digital video processing, in particular to a high-efficiency video encoding rate-distortion optimization quantization method. Background technique [0002] In order to support the next-generation high-definition video application HEVC, the Joint Collaborative Team on Video Coding (JVT-VC) proposed High Efficiency Video Coding (HEVC) as a new generation of general video coding standards. With scalable 4-tree decomposition and various advanced coding tools, HEVC can adapt to variable resolutions / terminals / scenes, and can provide half the bit rate close to Advanced Video Coding (AVC) quality video. [0003] Among these advanced coding tools, the rate-distortion optimization method (Rate-Distortion Optimization, RDO) is an important one. The introduction of RDO into the encoding process starts from AVC, but the application of RDO in HEVC is wider, and it runs through the entire encoding process of HEVC. [0004] For...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/13H04N19/147H04N19/124
CPCH04N19/124H04N19/13H04N19/147
Inventor 诸悦刘斌万建军张磊章旭东汤勇
Owner SHANGHAI FULLHAN MICROELECTRONICS
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