FGS比特流的差错复原性能

Error Resilience Performance of FGS Bit Streams

基于IP的视频通信不可避免地要面临信道差错的影响,如比特误码和分组丢失。可分级编码是解决这些问题的重要方法之一。FGS(FineGranularityScalability)是一种全新的可分级编码方法,它能提供非常精细的可分级编码能力。研究了FGS比特流在IP网络上的传输特性,并为FGS比特流引入了一种差错还原打包方案。仿真结果表明,该打包方案可以明显地改善FGS比特流的差错还原能力。

IP-based video communication suffers from channel errors, such as bit errors and packets loss. Scalable coding is one of the important methods to resolve these problems. FGS is a kind of new scalable coding method, which can provide very fine scalability. In this paper, the transmission performance of FGS bit streams over IP networks is researched and a error resilient packing scheme for FGS bit streams is introduced. Simulation results show that this packing scheme can improve the error resilience capability of the FGS bit streams significantly.