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首页> 外文期刊>Journal of visual communication & image representation >Improved macroblock level rate control for the spatially scalable extension of H.264/AVC
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Improved macroblock level rate control for the spatially scalable extension of H.264/AVC

机译：改进的宏块级速率控制，用于H.264 / AVC的空间可扩展扩展

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摘要

An improved rate control algorithm, designed for scalable video coders incorporating interlayer prediction, is proposed. Firstly, a Rate Distortion (RD) model for interlayer prediction involving the spatial enhancement layers is devised. An optimised Mean Absolute Difference (MAD) prediction model for the spatial enhancement layers that considers both the MAD from the spatial base layer in the same frame and the MAD from the corresponding macroblock in previous frames is also proposed. Simulation results show that the resulting algorithm produces accurate rate control with an average bit rate error of less than 0.26%. Compared with the JVT-W043 default rate control algorithm of the JSVM, the proposed algorithm improves the average PSNR by up to 0.53 dB or reduces the bit rate by an average of 10.95%. Furthermore, the proposed algorithm can be combined with the existing rate control scheme for H.264/AVC, resulting in further improvements. (C) 2017 Elsevier Inc. All rights reserved.
机译：提出了一种针对层间预测的可伸缩视频编码器设计的改进速率控制算法。首先，设计了一种涉及空间增强层的层间预测率失真模型。还提出了一种针对空间增强层的优化平均绝对差（MAD）预测模型，该模型同时考虑了同一帧中来自空间基础层的MAD和先前帧中来自相应宏块的MAD。仿真结果表明，该算法产生了精确的码率控制，平均比特率误差小于0.26％。与JSVM的JVT-W043默认速率控制算法相比，该算法将平均PSNR提高了0.53 dB，或将比特率平均降低了10.95％。此外，所提出的算法可以与用于H.264 / AVC的现有速率控制方案相结合，从而实现进一步的改进。 （C）2017 Elsevier Inc.保留所有权利。

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