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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...
We present an algorithm to optimize the allocation of channel bitrate to different network abstraction layer (NAL) units of the H.264/AVC scalable video bitstreams for real-time multicast streaming over heterogeneous networks. We focus on the problem of achieving a high robustness of video streaming under varying channel conditions in terms of the reconstructed video qualities at different users....
Motion estimation is a very important part of video compression. As a result of using precision of motion vector in H.264 encoder, the computational cost increases rapidly, and motion estimation is the most time-consuming stage. In this paper, based on the UMHexagonS algorithm, an optimized algorithm is proposed based on the dynamic search window selection, big hexagon and small hexagon search mode...
This paper describes in detail the various low level optimization techniques for implementing the H.264/AVC video encoding on the TI TMS320DM642 DSP platform. Optimization speedup performance of 5.25 times faster is achieved. A complete AVC encoding and RTSP streaming server system is also developed on the same platform, which is capable of serving live 4CIF video streaming at 25 fps with approximately...
This paper presents a study on video plus depth compression using available MPEG standards and its optimization for mobile 3D services. Video plus depth enables 3D television, but as mobile services are subject to various limitations, including bandwidth, memory, and processing power, efficient compression as well as low complexity view synthesis is required. Two MPEG coding standards are applicable...
The H.264 video coding standard has achieved a significant improvement in coding efficiency over previous standards. However, the computational complexity of the H.264 encoder is increased drastically, which results practical difficulties in its implementation on the embedded platform. This paper presents two implementation techniques to optimize the H.264 encoder on the embedded symmetric multiprocessor...
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...
Efficient multi-view coding requires coding algorithms that exploit temporal, as well as inter-view dependencies between adjacent cameras. Based on a spatiotemporal analysis on the multi-view data set, we present a coding scheme utilizing an H.264/MPEG4-AVC codec. To handle the specific requirements of multi-view datasets, namely temporal and inter-view correlation, two main features of the coder...
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