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Adaptive intra-refresh for low-delay error-resilient video coding

机译:低延迟错误弹性视频编码的自适应帧内刷新

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Low-delay and error-resilient video coding is critical for real-time video communication over wireless networks. Intra-refresh coding, which embeds intra coded regions into inter frames can achieve a relatively smooth bit-rate and terminate the error propagation caused by the transmission loss. In this paper, we proposed a novel linear model for the intra-refresh cycle-size selection adapting to the network packet loss rates and the motions in the video content. We also analyze issues in designing the intra-refresh coding pattern and the refresh order, and propose a strategy which can adapt to different cycle-size and obtain better R-D performance compared with traditional random intra-refresh and vertical-partition intra-refresh. Experimental results show that the linear cycle-size selection model works effectively, where a 3 dB improvement can be achieved compared with a fixed cycle-size. Also, with the proposed intra-refresh order, a 2.0% bitrate reduction is obtained in average compared with the vertical-partition intra-refresh. (C) 2015 Elsevier Inc. All rights reserved.
机译:低延迟和具有弹性的视频编码对于通过无线网络进行实时视频通信至关重要。将帧内编码区域嵌入帧间帧中的帧内刷新编码可以实现相对平滑的比特率,并终止由传输损耗引起的错误传播。在本文中,我们针对网络内丢包率和视频内容中的运动提出了一种新的线性模型用于刷新周期大小选择。我们还分析了设计帧内刷新模式和刷新顺序的问题,并提出了一种策略,该策略与传统的随机帧内刷新和垂直分区帧内刷新相比,可以适应不同的周期大小并获得更好的R-D性能。实验结果表明,线性周期大小选择模型可以有效地工作,与固定周期大小相比,可以提高3 dB。同样,采用建议的帧内刷新顺序,与垂直分区的帧内刷新相比,平均可以获得2.0%的比特率降低。 (C)2015 Elsevier Inc.保留所有权利。

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