Quad Tree Structured Walsh Transform Video / Image Coding (QUADTREE-STRUCTURED WALSH TRANSFORM VIDEO / IMAGE CODING)

摘要

The two-dimensional data structure is represented by a quad-tree code with built-in Walsh transform coefficients. The quad-tree code allows a variable block size inherent in the quadtrees, and computational simplicity of the Walsh transform representation of a nearly uniform data block. The structure of the quad tree is a digital system that makes a bottom-up decision because Walsh transform coefficients and distortion measurements can be recursively calculated using only Walsh transform coefficients from previous levels of the quadtree It is computationally simple to implement in. Variable length coding and uniform step size quantization optimal for the generalized Gaussian distribution allows rapid encoding and decoding of the quad-tree codes.