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Software Controller Implementation of AVS Decoder Based on OpenRISC 1200

Author: LiFengZhi
Tutor: WangZuQiang
School: Shandong University
Course: Circuits and Systems
Keywords: AVS OpenRISC 1200 SOC Software controller Verification
CLC: TN919.81
Type: Master's thesis
Year: 2011
Downloads: 28
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Abstract


In order to promote the upgrading and development of the audio and video industry , digital audio and video codec technology standards working group was set up in June 2002 , and the United Nations enterprises and research institutions , developed with independent intellectual property rights of digital audio and video encoding decoding standard - AVS standard . In March 2006 , Part 2 of the AVS standard ( AVS - P2 ) officially announced that it belongs to the second generation of efficient video encoding technology, high rate of data compression , with approximate and H.264 compression performance , and the solution is simple , patent low cost , good compatibility . SOC multiplexing, IP-based module embedded system as the core, the entire system is integrated in a single or a few chips , thus completing the entire system functions of complex integrated circuits . AVS decoding complexity is relatively high , using pure software design is difficult for real-time playback of high-definition video , using pure hardware design cost and low flexibility , real-time playback of high-definition video using the combination of hardware and software way is to design the SOC decoder chip video decoder can achieve a compromise between cost and performance . This article is a the AVS decoder software controller study design . First by OR1200 other commonly used soft-core processor compared , indicating the choice of the soft-core processor as the controller of reasons , and further study of the structure and instruction set of OR1 200 , was introduced to the decoder uses the Wishbone bus . Second , on the basis of research the AVS critical technology AVS video decoder software task complexity analysis , software and hardware division of tasks according to the function of each part , asked the AVS video decoder architecture defines the corresponding interface and the control section designed to make the description of the software , including the resolution process , storage display area profile , interrupt handling, synchronization control . Finally, the design of the software control program on the software and hardware platform verification, validation results show that the program is designed to meet the design requirements .

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