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A practical bit stream organization algorithm for robust H.264/SVC transmission

机译:实用的比特流组织算法,可实现可靠的H.264 / SVC传输

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摘要

The H.264/SVC standard, due to its desired scalable functionality and coding efficiency, provides an ideal candidate for video transmission in many scenarios such as erasure networks and networks with heterogeneous clients. In order to reduce the impact of network bandwidth fluctuation, an adaptive priority ordering (APO) algorithm for H.264/SVC bit stream organization is proposed. It arranges H.264/SVC coding layers according to their rate-distortion (R-D) tradeoff within a GOP so that transmitted video quality can be preserved in the presence of dynamic bandwidth conditions. A practical path model is developed to reduce the time and space complexity of the APO algorithm. It is shown by simulation results that the APO algorithm offers better performance than the default H.264/SVC ordering method adopted by the JSVM software and the quality layer-based ordering method proposed previously in preserving smooth video quality under the same bandwidth. The proposed algorithms could be used together with the unequal error protection (UEP) method and the joint source-channel coding scheme to combat packet loss.
机译:H.264 / SVC标准由于其所需的可伸缩功能和编码效率,在许多情况下(例如擦除网络和具有异构客户端的网络)提供了视频传输的理想候选者。为了减少网络带宽波动的影响,提出了一种用于H.264 / SVC比特流组织的自适应优先级排序(APO)算法。它根据GOP中的速率失真(R-D)权衡安排H.264 / SVC编码层,以便在存在动态带宽条件的情况下可以保留传输的视频质量。开发了一种实用的路径模型以减少APO算法的时间和空间复杂度。仿真结果表明,APO算法比JSVM软件采用的默认H.264 / SVC排序方法和先前提出的基于质量层的排序方法在相同带宽下保持平滑视频质量时具有更好的性能。所提出的算法可以与不等错误保护(UEP)方法和联合源信道编码方案一起使用,以解决丢包问题。

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