可変長画素適応DPCMの符号化特性 : 符号量制御法の導入

概要

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This papaer discribes the coding characteristics of the pixel adaptive DPCM with bit-rate prescription for data compression of still images. In pixel-adaptive DPCM, a pixel is classified into one of the eight groups according to the magnitude of the prediction error of the preceeding pixel, and the number of quantizing bits is varied adaptively to the maximum of the absolute value of the prediciton errors in each block. The coding bit-rate is successfully controlled less than the prescribed value within a tolerance by applying the pre-scanning.
社団法人映像情報メディア学会の論文
1991-01-25