SPECIFIC TRANSFORM COEFFICIENT PRIORITY CODING DEVICE, SPECIFIC TRANSFORM COEFFICIENT PRIORITY CODING DECODING SYSTEM, AND SPECIFIC TRANSFORM COEFFICIENT PRIORITY CODING METHOD

摘要

PPROBLEM TO BE SOLVED: To keep superior quality at both the perimeter of tiling and the inside of tilting by subjecting a specified transform coefficient to priority coding out of transform coefficients in the periphery of tiling boundary in a wavelet transform coding process of a tiling image. PSOLUTION: In a coding device, tiling separation, wavelet transformation, quantization, and entropy coding are carried out. The coding device includes a transform coefficient selecting unit 105 for selecting a specified transfer coefficient out of transform coefficients, of which tiling-separated image information is subjected to wavelet conversion, and a transfer coefficient shifting unit 103 for shifting so that this selected specified transfer coefficient is subjected to priority coding, whereas the object after shifting is subjected to entropy coding. PCOPYRIGHT: (C)2005,JPO&NCIPI