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AVS2 video coding and decoding standard optimization scheme

A technology for video encoding and decoding and optimization schemes, applied in the field of AVS2 video encoding and decoding standard optimization schemes, can solve problems affecting encoding bit rate and video quality, and achieve the effect of avoiding repeated calculation, improving video quality, and increasing encoding rate.

Inactive Publication Date: 2019-10-22
武汉玉航科技有限公司
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Problems solved by technology

In addition, the quantization process is one of the main causes of distortion in video coding and images, and at the same time, it affects the coding bit rate and video quality. Therefore, how to reduce the computational complexity and improve the coding speed is a key issue in video coding technology

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  • AVS2 video coding and decoding standard optimization scheme
  • AVS2 video coding and decoding standard optimization scheme
  • AVS2 video coding and decoding standard optimization scheme

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0040] Such as figure 1 Shown, a kind of AVS2 video codec standard optimization scheme of the present invention, general video coding comprises the following steps:

[0041] S1. Input the original video image, divide the original video image into consecutive largest coding blocks of 64×64 pixels in sequence, divide each largest coding block into smallest coding blocks of 8×8 pixels, and determine each smallest coding block The best prediction mode...

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Abstract

The invention provides an AVS2 video coding and decoding standard optimization scheme. The AVS2 video coding and decoding standard optimization scheme judges whether a rate distortion optimization quantization process is carried out in advance by utilizing the relation between scalar quantization and rate distortion optimization quantization, and directly judges that all quantization results are 0if the process is not needed, that is, a judgment condition for quantizing a coefficient block to be all 0 is added in advance, so that the quantization process time can be shortened, and the video compression rate can be increased. By setting the database used for storing the two quantization results, the scheme for directly replacing previously similar quantized coefficient blocks, which need to be quantized currently, of DCT coefficient blocks in database, can avoid repeated calculation, can improve the coding efficiency on the premise that the compression rate and the video quality are guaranteed, and can save the coding time. By adding the threshold condition for ending the search in advance in the motion estimation, the AVS2 video coding and decoding standard optimization scheme canimprove the coding rate under the condition that the video quality loss cost is relatively low.

Description

technical field [0001] The invention relates to the field of video coding and decoding, in particular to an optimization scheme of the AVS2 video coding and decoding standard. Background technique [0002] With the development of multimedia information technology, video is more and more widely used in video data storage, remote video network, video live broadcast, home theater and many other fields. Video image data has a strong correlation. There are many adjacent pixels in a frame of image that have similar or identical data, which is spatial redundancy, and there are many similar or repeated data between adjacent frames in the video. This is Time-domain redundancy, coding compression is to remove these redundant information in the data, intra-frame coding technology can remove spatial-domain redundancy, and inter-frame coding technology can remove time-domain redundancy. Inter-frame coding uses the correlation between adjacent frames to divide a frame of image into sever...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/103H04N19/119H04N19/124H04N19/13H04N19/147H04N19/176H04N19/51H04N19/61H04N19/625H04N19/70H04N19/91
CPCH04N19/103H04N19/119H04N19/124H04N19/13H04N19/147H04N19/176H04N19/51H04N19/61H04N19/625H04N19/70H04N19/91
Inventor 邹飞勇张明利冯战奎江浩洋张金林郎海
Owner 武汉玉航科技有限公司
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