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Design and Optimization of Video Encoder Chip

Author: QianLiGuo
Tutor: YuLu
School: Zhejiang University
Course: Information and Communication Engineering
Keywords: Video encoder AVS Optimal design Intra prediction Ring filtering ASIC / FPGA Speed Area
CLC: TN761
Type: Master's thesis
Year: 2006
Downloads: 186
Quote: 1
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Abstract


In the field of video compression technology , the latest video compression the international standard H.264/AVC and AVS (Audio Video Coding Standard) higher coding efficiency with independent intellectual property rights in China , but the attendant is implemented in hardware complexity greatly increases, so it is necessary to optimize the design . This paper studies the video encoder optimized design technology . The optimized design of the video encoder is mainly carried out from two aspects of the system layer and the circuit layer . System layer optimization design premise to meet the design requirements , in accordance with the principle of hardware implementation of the system architecture . This part of the optimization algorithm -level optimization of pipeline stage depth arrangements . From the area in terms of the circuit layer optimization to maximize the use of reusable design methodology , to share resources ; critical path of logic circuits from a performance point of view , as far as possible to simplify the use of parallel processing , and critical path . Layer optimization design of the system , for the design of intra prediction in AVS encoder , traditional algorithms are not conducive to the hardware architecture to achieve real-time encoding , so the paper presents an optimization algorithm . The cost of this optimization algorithm to improve the bit rate of 3 % to 4 % (all I frames) in exchange for a greatly improved system speed . Ring inside the filter module , based on reducing the the RAM operating time , the purpose of improving performance , to re- arrange the filter order to design a system architecture suitable for this filter order . The circuit layer optimization design , the use of a reusable design methodology and design to improve the degree of parallelism . For reusable design method , the main is to analyze the similarity of the prediction process between various modes of intra-prediction , the prediction unit can be configured design . Design method to improve the degree of parallelism reflected in the design of the loop filter which will inevitably bring about a lot of conditional branch : high adaptability due to filtering ring , so the use of the parallel design ideas for conditional branching advance judgment strategy logical path , reducing the delay.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Modulation technique and the modulator,demodulator and the demodulator > Modulation technique and the modulator
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