WAVELET INVERSE CONVERTING DEVICE AND ITS METHOD AND WAVELET DECODING DEVICE AND ITS METHOD

摘要

PROBLEM TO BE SOLVED: To provide a wavelet inverse converting device and method and a wavelet decoding device and method for decoding only arbitrary partial pictures without decoding all pictures by inputting an encoded bit stream generated by wavelet converting all normal pictures. SOLUTION: A decoding object region determining part 11 determines the decoding object region and transmits the position coordinates of a vertex in the case of a rectangular region. A decoding object coefficient extracting part 12 extracts a coefficient necessary for decoding the region decided by the region to be decoded deciding part 11, and transmits it to a wavelet inverse converting part 13. Especially, the coefficient extracting part 12 extract the converted coefficient of the outer periphery of the region in addition to the coefficient of the specific region. The wavelet inverse converting part 13 inverse converts the coefficients extracted by the coefficient extracting part 12.