Image compression and coding for ATM networks

In ATM networks, loss of video packets either due to random bit error in ce ll header or due to network congestion has the greatest influence on pictur e quality. if coding information is separated into most significant part (M SP) and least significant part (LSP) and MSP packets take priority over LSP packets, then the packet loss has only a small influence on picture qualit y. This coding technique is called layered coding technique. If coding info rmation is separated into different parts with different priorities, packet loss will have a small influence on picture quality, in addition to a larg e decrease in bandwidth. This new layered coding technique using discrete c osine transform is discussed here. The influence of packet loss on picture quality is described with the decoded picture along with mean square error.