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Reference picture selection with decreased temporal dependency for HEVC error resilience

机译:参考图片选择,减少对 HEVC 容错能力的时间依赖性

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摘要

The high level of compression efficiency achieved by the High-Efficiency Video Coding standard (HEVC) decreases the robustness of the encoded bitstreams. This increased susceptibility to network errors leads to end video quality degradation. Moreover, due to the high computational complexity of HEVC, high-resolution video transmission with time constraints over hostile channels such as wireless networks becomes more challenging. This paper proposes a reference picture selection-based error-resilient method to reduce the temporal error propagation due to high-trip delay and frame-copy concealment error. First, the encoder selects the reference pictures based on the error status received from the feedback channel, taking into consideration the Rate-Distortion-Optimization (RDO). Second, the temporal information mismatch prediction resulting from the error concealment is reduced by decreasing the temporal dependency between adjacent frames based on new motion -estimation tools. Results show a PSNR gain of about 6.13 dB, 5.20 dB and 4.72 dB for 1080p, 720p and 480p resolutions respectively.
机译:高效视频编码标准 (HEVC) 实现的高压缩效率降低了编码比特流的鲁棒性。这种对网络错误的敏感性增加会导致最终视频质量下降。此外,由于HEVC的计算复杂度高,在无线网络等敌对信道上进行具有时间限制的高分辨率视频传输变得更具挑战性。该文提出一种基于参考图片选择的容错方法,以减少高行程延迟和帧复制隐藏误差引起的时间误差传播。首先,编码器根据从反馈通道接收到的误差状态选择参考图像,同时考虑速率失真优化(RDO)。其次,基于新的运动估计工具,通过降低相邻帧之间的时间依赖性,减少了误差隐藏导致的时间信息失配预测。结果显示,在1080p、720p和480p分辨率下,PSNR增益分别约为6.13 dB、5.20 dB和4.72 dB。

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