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avs-2 video decoder device based on hardware and software partition

A video decoder, AVS-2 technology, applied in the field of video decoding, can solve problems such as insufficient flexibility and processing defects, and achieve the effect of meeting real-time decoding requirements

Active Publication Date: 2020-06-16
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the hardware-implemented decoder itself has certain limitations, that is, insufficient flexibility, and there are defects in the processing of some more flexible algorithms and code stream analysis in the AVS-2 standard

Method used

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  • avs-2 video decoder device based on hardware and software partition
  • avs-2 video decoder device based on hardware and software partition

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Embodiment 1

[0038] The purpose of the embodiments of the present invention is to realize an efficient AVS-2 decoder structure based on software and hardware partitions by organically integrating the decoding features of software and hardware so that they work together.

[0039] The embodiment of the present invention provides an AVS-2 video decoder device based on hardware and software partitioning, which can meet the real-time decoding requirements of ultra-high-definition video.

[0040] For the convenience of explanation, the following concepts are first introduced:

[0041] Intra-frame prediction: Intra-frame prediction mainly achieves compression by utilizing the correlation of adjacent pixels. By modeling the surrounding pixels, the current pixel value is predicted, and the residual value between the actual value and the predicted value of the current pixel is obtained, and then the residual value is subjected to subsequent encoding processing, thereby reducing the amount of data. ...

Embodiment 2

[0073] Suppose it is necessary to decode an ultra-high-definition video stream (for example, a movie), reconstruct the frame sequence of the ultra-high-definition video stream, and output it to a display device.

[0074] First of all, for the input code stream, the software partition will parse the code stream to obtain sequence header and frame header information, such as sequence frame structure, image width and height, pixel sample bit number, etc. Perform configuration such as initialization for sequence and frame information and reference frame buffers. At the same time, it judges the enabling of optional tools according to the parsed syntax parameters: whether to use asymmetric partition, whether to use weighted quantization, etc. If the corresponding optional tool is enabled for the code stream, then analyze the corresponding tool coefficients. If weighted quantization is enabled, then analyze the corresponding quantization matrix. The software will continue to decode ...

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Abstract

The invention provides an AVS-2 video decoder structure based on separation of software and hardware areas. The structure comprises a software operation unit and a hardware operation unit, wherein the software operation unit is used for controlling the system of the AVS-2 video decoder, performing grammatical meaning analysis on a code stream entering the AVS-2 video decoder, acquiring a sequence header and frame header grammar information of the code stream, and managing a reference frame of the code stream, and rearranging each frame of the code stream according to a coefficient parameter transmitted by the sequence header of the code stream, the frame header grammar information, the reference frame and a hardware unit to acquire a video sequence as a decoding result; and the hardware operation unit is used for accelerating each part in parallel during a decoding process of the code stream, and analyzing the coefficient parameter in the code stream. According to the structure provided by the invention, an efficient decoder system is achieved via a reasonable structure design and the thinking of separating software and hardware areas, and thus an ultrahigh definition video under the AVS-2 standard can be decoded with high performance and high energy efficiency, and the real-time decoding requirement of the ultrahigh definition video can be met.

Description

technical field [0001] The present invention relates to the technical field of video decoding, in particular to an AVS-2 video decoder device based on hardware and software partitioning. Background technique [0002] Video coding technology is to compress the original video data from the directions of time domain redundancy, air domain redundancy and statistical redundancy, and effectively solve the problems of massive video storage and transmission. It is widely used in network video transmission, digital video On-demand, security monitoring and other related fields. AVS (Audio Video coding Standard, audio and video coding standard)-2, as a new generation of video coding standard with independent intellectual property rights in my country, can perform very efficient compression for ultra-high-definition video, meeting people's increasing requirements for resolution and quality , so it has broad application prospects. Taking security monitoring as an example, AVS-2 can opti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/109H04N19/11H04N19/124H04N19/156H04N19/159H04N19/42H04N19/51
CPCH04N19/109H04N19/11H04N19/124H04N19/156H04N19/159H04N19/42H04N19/51
Inventor 解晓东王宇鹭贾惠柱
Owner PEKING UNIV
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