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首页> 外文期刊>International journal of communication systems >Motion adaptive video coding scheme for time-varying network
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Motion adaptive video coding scheme for time-varying network

机译：时变网络的运动自适应视频编码方案

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Adaptive video coding algorithms can encode a video stream dynamically on the basis of the amount of bandwidth available in a network. In this paper, a novel approach for adaptive video coding based on look-up tables has been proposed. On the basis of the network conditions, the proposed codec estimates quantization parameter (QP) and also the spatial resolution for a group of pictures from the look-up table. Then, QP for each frame is estimated on the basis of the motion content in each frame. More motion leads to more burden of bits while encoding the motion vectors. Also, quantization noise is less prominent in high-motioned frames than frames possessing low motion information because of the temporal masking phenomenon of the human eyes. So, the main trick of the proposed scheme is to assign higher QP to the frames having higher motion than those having less motion. This method also reduces the requirement of excess bits for encoding of motion vectors having higher motion content. Additionally, QP is adjusted on the basis of the buffer availability in order to avoid bit loss error. Experimental results show the efficacy of the proposed codec. Copyright (c) 2013 John Wiley & Sons, Ltd.
机译：自适应视频编码算法可以根据网络中可用的带宽量动态地对视频流进行编码。在本文中，提出了一种新的基于查找表的自适应视频编码方法。根据网络条件，建议的编解码器会根据查找表估算一组图片的量化参数（QP）以及空间分辨率。然后，基于每个帧中的运动内容来估计每个帧的QP。在编码运动矢量时，更多的运动导致更多的比特负担。而且，由于人眼的时间掩盖现象，在高运动帧中量化噪声不如在具有低运动信息的帧中突出。因此，所提出的方案的主要技巧是向具有较高运动的帧分配比具有较少运动的帧更高的QP。该方法还减少了对具有较高运动内容的运动矢量进行编码的多余比特的需求。另外，基于缓冲器的可用性来调整QP，以避免比特丢失错误。实验结果表明了该编解码器的有效性。版权所有（c）2013 John Wiley＆Sons，Ltd.

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