Patent ID: 8369404

Claim:
A moving image decoding device for decoding a digital moving image signal, based on an input of a bit stream generated by subjecting the digital moving image signal to compression encoding in which the digital moving image signal is transformed and quantized on a block basis, the moving image decoding device comprising: a decoding unit for decoding chroma format identification information for designating a chroma format of an input video signal to be encoded, common encoding or independent encoding identification information indicating which of encoding through a common encoding process and encoding through an independent encoding process is to be executed, and intra only encoding instruction information indicating whether or not to intra encode all pictures corresponding to the digital moving image signal, wherein the decoding unit generates a decoded image in which a deblocking filter provided at each boundary between blocks serving as units of the transform and quantization is disabled when the intra only encoding instruction information indicates that all the pictures corresponding to the digital moving image signal are to be intra encoded; the decoding unit decodes using an intra prediction mode which is different regarding luminance components and chrominance components when the chroma formats are 4:2:0 and 4:2:2 based on chroma format identification information; the decoding unit decodes using an intra prediction image of each color component generated based on a unique intra prediction mode common to all the color components when the chroma format is 4:4:4 and the common encoding or independent encoding identification information indicates common encoding processing; and the decoding unit decodes using an intra prediction image of each color component generated based on an individual intra prediction mode for each color component when the chroma format is 4:4:4 and the common encoding or independent encoding identification information indicates independent encoding processing.