IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an encoding device, a decoding device, an encoding method, and a decoding method that enhance optimality in the encoding of moving image signals having no sample ratio distinction between color components such as a 4:4:4 format.

SOLUTION: When compression encoding is conducted by entering digital moving image signals of the 4:4:4 format, there are prepared a step of encoding three color component signals of the input moving image signals in a common encoding mode, and a step of encoding the three color component signals of the input moving image signals in respective independent encoding modes. The encoding step is conducted by selecting any one of the first encoding step and the second encoding step, and the compression data contain an identification signal for specifying which step is selected.

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