Context Based Combined Multiple Description Video Coding

Multiple Description (MD) video coding can be used to reduce the negative effects caused by transmission over error-prone networks, Various approaches have been proposed for MD coding, each having their own advantages and disadvantages. Normally any approach having higher compression ratio has lower signal-to-noise ratio. The hybrid MD coding method segments the video in both the spatial domain and frequency domain. The hybrid MD decoder takes advantage of the residual-pixel correlations in the spatial domain, and the coefficient correlations in the frequency domain, for error concealment in the case of data loss. The proposed Context Based Combined MD coding segments the image into foreground and background. The foreground which contains significant information is transmitted using four channels whereas the background is transmitted using two channels. As a result, the desired quality and better error resilience can be achieved at the foreground and faster transmission at the background, effectively reducing the total transmission time.