画像のサブバンド外挿内挿予測符号化 : 画像通信システム

抄録

Sub-band coding is one of the methods having a high coding efficiency. In sub-band coding, many bits need to be assigned at lower bands where the energy concentrates. Therefore, higher coding efficiency can be obtained by combining sub-band coding with extra/interpolative prediction coding which has a high coding efficiency also at a high bit rate. Moreover, the proposed method selects the optimum variable length codes for every block to adapt to the local character of a picture. It is shown that the proposed method excels the international standard JPEG.