Packet loss is inevitable when the video is transmitted over lossy channels. HEVC, due to the relatively large coding unit and high compression ratio, is much sensitive to data loss. Against the data loss, the responses of inter or intra coded blocks/frames are not the same. In the case of intra coding, the inter-frame dependency is removed and hence the error propagation is mitigated. However, with intra coding, since there is no motion vector, error concealment is more challenging than inter coding. Another difference between inter and intra coding is compression ratio where it is usually much better when using inter prediction. In this paper, taking into account the above trade-offs, a series of experiments is conducted to show the domain of preference of intra or inter coding in the application of HEVC video transmission over packet lossy networks. It is achieved that, if ratio of bitrates of I-Frames and P-Frames is smaller than a threshold, fully intra coding provides higher PSNR than some complicated methods; the improvement is as much as 2.5 dB sometimes. The performance of the proposed method is not the best as experimental results show, but besides its acceptable Rate-Quality behavior, it provides some side advantages.

中文翻译：

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有利于通过有损通道进行 HEVC 视频传输的完全帧内编码

当视频通过有损信道传输时，丢包是不可避免的。HEVC由于编码单元比较大，压缩率高，对数据丢失非常敏感。对于数据丢失，帧间或帧内编码块/帧的响应是不同的。在帧内编码的情况下，帧间依赖被去除，因此错误传播被减轻。然而，对于帧内编码，由于没有运动矢量，错误隐藏比帧间编码更具挑战性。帧间和帧内编码之间的另一个区别是压缩率，在使用帧间预测时，压缩率通常要好得多。在本文中，考虑到上述权衡，进行了一系列实验以显示帧内或帧间编码在 HEVC 视频传输在分组有损网络上的应用中的偏好域。实现了，如果I-Frames和P-Frames的码率比小于阈值，则完全帧内编码比一些复杂的方法提供更高的PSNR；有时改善高达 2.5 dB。所提出方法的性能并不如实验结果所示最好，但除了其可接受的 Rate-Quality 行为外，它还提供了一些附带优势。