Adaptive entropy coding in adaptive quantization framework for the process and the image signal encoding system

摘要

(57) The method and system of summary compression, for each portion of the frame or the image frame, a quantum of one from a set of quantizer is a set of quantization values ​​predetermined by each quantizer and includes a process for encoding the quantized values ​​by using the adaptive quantization for selecting a coder, the entropy encoding table of individual quantizer or by entropy encoding table in common. Entropy encoding table is obtained by learning procedure. Selection of the quantizer is based on a formula that takes into account the bit rate characteristics and distortion of the quantizer. Formulas based on the same bit rate characteristics and distortion, are also used to select the quantization value of the specific quantizer for each of the image signal values ​​that are encoded, was chosen.