Three-dimensional video compression using subband wavelet transform with lower buffering requirements

Three-dimensional (3-D) video compression using wavelets decomposition alon g the temporal axis dictates that a number of video frames must be buffered to allow for the temporal decomposition. Buffering of frames allows for th e temporal correlation to be made use of, and the larger the buffer the mor e effective the decomposition. One problem inherent in such a set up in int eractive applications such as video conferencing, is that buffering transla tes into a corresponding time delay. In this paper, we show that 3-D coding of such image sequences can be achieved in the true sense of temporal dire ction decomposition but with much less buffering requirements. For a practi cal coder, this can be achieved by introducing an approximation to the may the transform coefficients are encoded. Applying wavelet decomposition usin g some types of filters may introduce edge errors, which become more promin ent in short signal segments. We also present a solution to this problem fo r the Daubechies family of filters.