H.264 FMO码流率失真优化调度算法

UDP(User Datagram Protocol)比TCP(Transmission Control Protocol)更适合于对传输的及时性有要求的流媒体，但是实际应用中遇到了分组丢失的严峻挑战.这篇论文中,通过丢弃特定的NALU(Network Access Layer Unit)来详细分析了采用FMO(Flexible Macroblock Ordering)编码选项的H.264码流的抗误码性能，并根据实际的实验数据,获得UDP信道的传输曲线,建立了UDP信道模型.在分析H.264 FMO码流传输性能的基础上,结合UDP信道模型,提出了H.264 FMO码流率失真优化调度算法.仿真结果表明,相对于其他的调度算法,该算法在UDP信道环境下可以获得更优越的传输性能,并保证了UDP分组对TCP分组的友好性.

H.264 FMO Stream Rate Distortion Optimization Based Scheduling

In this paper, we analyze the error resilience of H.264 stream adopted FMO (Flexible Macroblock Order) option by experiments of dropping particular NALU (Network Access Layer Unit). Then, we analyze the rate-distortion of the transmission of H.264 FMO stream by calculating the transmission performance. From experiments, we gain the transmission curve of the UDP (User Datagram Protocol) channel and build the UDP channel model. According to the UDP channel model, Minimum Rate-Distortion scheduling for FMO stream (MRDF) is proposed, which outperforms other scheduling in simulation, achieving rate-distortion optimization transmission over packet lossy UDP channel.