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The paper optimizes AVS key coding algorithm, and designs high coding efficiency and high coding quality AVS encoder XAVS based on x86 platform. It supports IPPP, IBBP structure, films on a variety of formats of media sources to AVS compression, rate control, rate distortion optimization, and packaged into the standard TS stream. The experiment results show that subjective quality of XAVS is better...
H.264 adopts variable block size motion estimation and rate-distortion-optimization based mode decision to improve video quality and compression ratio. These techniques have made H.264 better than other existing video coding standards. However, they are computationally intensive and time-consuming. In this paper, a fast mode selection scheme is proposed for H.264 inter prediction. Firstly, the first...
The rate-distortion optimization framework employed in H.264 for the selection of best coding mode is computationally expensive, although it achieves remarkable coding efficiency. In this paper, an integrated intra prediction algorithm for intra-frame coding of the H.264 high profile is proposed. It consists of two components: a variance-based method for macroblock mode decision and an improved filter-based...
In order to facilitate the H.264/AVC implementation in application system with low bit rate; its coding algorithm should be optimized. In this paper, through analysis of the motion vector distribution in the video image and the serial search strategy, a type of parallel program based on the cross search algorithm is presented, designed and implemented. Finally this design program is played in the...
Inter-frame coding in the H.264/AVC standard must address inter modes and intra modes when seeking the best coding mode. Despite achieving a higher coding efficiency than any other previous coding standards, H.264/AVC also has a significantly high computation complexity. This investigation, based on the information of the histogram difference and rate part of the rate-distortion optimization in motion...
Based on the statistical analysis of relation between CBP (Coded Block Pattern), MVD (Motion Vector Difference) and each coding mode, a fast mode selection algorithm based on macroblock-adaptive is proposed. In this algorithm, adaptive judgment strategies are adopted to filter partial coding mode quickly. The residual CBP, MVD information is used adequately to identify the relativity of intra and...
As a new generation of video frequency coding standard, H.264/AVC is excellent in compression performance, while its complexity is much higher than common encoder. Based on the detailed analysis of CAVLC algorithm, this paper first points out the ldquobottleneckrdquo of CAVLC encoder implementation, then presents the optimization scheme for the major modules of CAVLC encoder, which includes VLC table...
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