【摘要】 为了减小P2P VOD系统中的时延和拒绝率,提出了一种新的多描述编码方案,定义了“最多丢失描述数”和“期望概率”的概念。该编码和具有伸缩性的信源编码一起,能够为P2P VOD系统中的数据分发提供合理的解决方案。理论和实验表明,与文献[5]中算法相比,在同样获得理想质量的情况下,该方案实现更简单,速度约是文献[5]中算法的2倍左右。更多还原

【Abstract】 In order to reduce the delay and rejection rates of P2P VOD, a new Multiple Description Coding scheme was proposed, and two concepts, the largest number of lost descriptions and the expected probability, were introduced. In conjunction with any source coder that is scalable, this scheme can be regarded as a better choice to distribute the video data for P2P VOD system. Theory and simulation results justify that the scheme is about twice as fast as the algorithm in reference , and can be easily implemented with the same quality.更多还原