適応離散コサイン変換プログレッシブ符号化方式の改良法 : ハイビジョン特別研究会 : 視覚情報 : 画像通信システム : 画像処理・画像応用

概要

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Adaptive Discrete Cosine Transform progressive Coding Scheme(ADCT-PCS) codes an original image in several stages. At the first stage, the subsampled original image is coded at low bit-rate. By decoding this coded image, receiver can get the low quality decoded image very early. At each later stage, the residual error image(REI), i.e. the error of the decoded image, is coded. Rceiver can improve the decoded image quality by using the decoded REI. After the second stage, however, the values of some areas of REI often become very small. So if these small value areas of REI are skipped, the coding efficiency of ADCT-PCS will be increased. The present report proposes a method of improving the REI coding algorithm for ADCT-PCS.
社団法人映像情報メディア学会の論文