摘要
Since the significance of each layer in scalable coding is different, making use of this characteristic can rea-sonably use such resources as bandwidth, processing and caching by deploying varied QoS control strategies for differ-ent layers. This paper presents an idea of unequal QoS control and the implementation mechanism at two ends oftransmission based on RTP and MPEG-4 scalable coding, redefines the sequence number field of RTP header and ex-tends the RTP header. These can not only realize unequal bandwidth pre-allocation and unequal error protection, butalso rapidly and precisely estimate the delay jitter and packet loss ratio.
Since the significance of each layer in scalable coding is different, making use of this characteristic can reasonably use such resources as bandwidth, processing and caching by deploying varied QoS control strategies for different layer's. This paper presents an idea of unequal QoS control and the implementation mechanism at two ends of transmission based on RTP and MPEG-4 scalable coding, redefines the sequence number field of RTP header and extends the RTP header. These can not only realize unequal bandwidth pre-allocation and unequal error protection, but also rapidly and precisely estimate the delay jitter and packet loss ratio.
出处
《计算机科学》
CSCD
北大核心
2002年第12期51-52,48,共3页
Computer Science
