A Wavelet Codec Using 3-D ESCOT

In this paper, we present an efficient three-dimensional wavelet video coding algorithm called 3-D Embedded Subband Coding with Optimized Truncation (3-D ESCOT). In the proposed ESCOT algorithm, the coefficients in each subband are coded independently using fractional bit-plane coding approach. This feature makes it very easy to achieve frame-rate scalability and resolution scalability for the codedvideo stream. Moreover, context-based adaptive arithmetic coder with elaborated context assignment as well as global rate-distortion optimization is used in the ESCOT algorithm to achieve high compression efficiency. Compared with 3-D SPIHT algorithm, 3-D ESCOT preserves the scalability of the compressed bit-stream and shows its higher compression performance. Experiments show that, 3-D ESCOT performs measurably and visually better than 3-D SPIHT. Depending on the complexity of motion and video content, the PSNR gain over 3-D SPIHT can be 0.8-1.8dB.