Layered Subband Video Coding Using Diamond Shaped Filters

An adaptive subband video coding system which uses diamond shaped filters for frequency band splitting is described in this paper. The input video signal is decomposed into four subbands by a tree structured diamond shaped filter bank. This kind of shape of frequency splitting is more flexible and matches the human visual system more closely than conventional rectangular subbands. For video transmission through broadband networks in ATM environments, layered coding is an attractive coding concept for its superior capability of cell loss resilience. An adaptive layered coding system which is built on the diamond-shaped subband structure is investigated in this paper. This layered system can reduce the aliasing error as much as possible while cell loss occurs.