Motion compensating module pixel prefetching device in AVS video hardware decoder

A hardware decoder and motion compensation technology, applied in the field of electronic information, can solve the problems of occupying storage interface bus time, large storage interface data throughput/bandwidth, etc., and achieve the effect of simple algorithm and easy hardware implementation

Inactive Publication Date: 2007-08-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Motion Compensation module consumes the longest storage interface bus time and the largest storage interface data throughput / bandwidth

Method used

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  • Motion compensating module pixel prefetching device in AVS video hardware decoder
  • Motion compensating module pixel prefetching device in AVS video hardware decoder
  • Motion compensating module pixel prefetching device in AVS video hardware decoder

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0023] In this embodiment, four 8×8 blocks in each macroblock are respectively named as No. 0, No. 1, No. 2 and No. 3 blocks from left to right and from top to bottom. The specific implementation process is as follows:

[0024] 1) When processing block 0 of a macroblock, the MC module sends a request to the prefetch device, and the prefetch device requests MIU to fill the prefetch cache;

[0025] When processing block 0, the decision control unit will send a buffer selection signal to the gate unit according to the reference frame flag given by the MC module, and gate the forward prefe...

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PUM

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Abstract

A pixel pre-fetching device of movement compensation module in AVS video hardware decoder consists of decision control module, write buffer storage unit, read buffer storage unit, gating unit, forward pre-fetching buffer storage, backward pre-fetching buffer storage and reread buffer storage. The method utilizing said device to pre-fetch pixel is also disclosed.

Description

technical field [0001] The invention relates to a device in the field of electronic information technology, in particular to a pixel prefetching device for a motion compensation module in an AVS video hardware decoder based on digital audio and video codec technology standards. Background technique [0002] Digital Audio and Video Codec Standard (AVS) is an audio and video source coding standard led by the China Digital Audio and Video Codec Standard Working Group (AVS Working Group). Common basic standards for digital audio and video industry groups such as laser video discs. In the design and implementation of AVS video hardware decoder, the bandwidth required by the memory interface is one of the important factors restricting system performance and cost. Among the modules that perform read and write operations on the memory, the motion compensation module occupies the most memory interface bandwidth, and is often the bottleneck of the entire decoding system. Reducing th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/24H04N19/105H04N19/176H04N19/433
Inventor 陆泳刘佩林
Owner SHANGHAI JIAO TONG UNIV
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