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ATM是兴起的宽带网标准,基于报文的视频正是宽带网上的一个典型应用.变位率视频的传输方法为恒定的视频质量提供了可能,但是在传输过程中,报文的丢失、延迟和延迟抖动等因素都会影响视频质量,因此有必要提供QoS保证.提出了两种新的在ATM网上进行MPEG视频传输的动态带宽分配算法,一种是动态计算算法,另一种是动态虚拟缓存算法.在这些算法中,根据允许的丢包率,动态地调整MPEG视频带宽以保证QoS.
ATM is the emerging broadband network standard, and packet-based video is a typical application in the broadband network. The transmission method of the bit rate video provides the possibility of constant video quality. However, in the transmission process, the packet loss and delay And delay jitter and other factors will affect the video quality, it is necessary to provide QoS guarantee.Two new dynamic bandwidth allocation algorithms for MPEG video transmission over ATM network are proposed, one is dynamic computing algorithm and the other is dynamic virtual cache Algorithm In these algorithms, MPEG video bandwidth is dynamically adjusted to guarantee QoS based on the allowable packet loss rate.