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A rate-control algorithm using inter-layer information for H.264/SVC for low-delay applications

机译:一种针对H.264 / SVC使用层间信息的低延迟应用的速率控制算法

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摘要

This paper proposes a novel frame-level rate-control scheme for H.264/SVC for low-delay applications. The trend of the Mean Absolute Difference (MAD) (after motion compensation) of the reference layer is used as the inter-layer information for Inter-layer MAD prediction, which is combined with Intra-layer MAD prediction to predict the MAD of the enhancement layers (EL) more accurately. By considering the influence from both the texture and nontexture information, the varying picture complexity and feedback information from the actual encoding results are combined to achieve an accurate bit-allocation. A coarse-to-fine initial quantization parameter (QP) selection method is proposed to refine the initial QP of the EL according to the channel condition and the video sequence characteristics. Experimental results demonstrate that the proposed scheme can obtain high and smooth PSNR, and the output bit-rate is close to the target bit-rate. Also, the proposed scheme can avoid serious buffer fullness fluctuation and reduce skipped frames in the video coding.
机译:本文针对低延迟应用提出了一种针对H.264 / SVC的新型帧级速率控制方案。参考层的平均绝对差(MAD)的趋势(运动补偿后)用作层间MAD预测的层间信息,与层内MAD预测相结合以预测增强的MAD层(EL)更准确。通过考虑纹理和非纹理信息的影响,可以将变化的图像复杂度和来自实际编码结果的反馈信息进行组合,以实现准确的位分配。提出了一种从粗到细的初始量化参数(QP)选择方法,以根据信道条件和视频序列特征来优化EL的初始QP。实验结果表明,该方案能获得较高的平滑PSNR,并且输出比特率接近目标比特率。而且,提出的方案可以避免严重的缓冲器充满度波动并减少视频编码中的跳帧。

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