Patent ID: 8249155

Claim:
A picture processing apparatus for decoding a motion picture stream encoded by using a first coding scheme, which provides intraframe coding and interframe predictive coding, and encoding the decoded motion picture stream by using a second coding scheme, the picture processing apparatus comprising: an input unit to which the motion picture stream is inputted, the motion picture stream including a first frame which is encoded by the first coding scheme while switching between the intraframe coding scheme and the interframe predictive coding scheme for each predetermined region and sub-information for each said predetermined region indicating whether the intraframe coding scheme or the interframe predictive coding scheme is used, a transcoder for decoding the input motion picture stream which is encoded by using the first coding scheme, and encoding the decoded input motion picture stream by using the second coding scheme, and an output unit for outputting the encoded input motion picture stream which is encoded by using the second coding scheme; wherein a predetermined region of the first frame of the output motion picture stream which is indicated by the sub-information as being encoded by the interframe predictive coding scheme is encoded by using the second coding scheme to reference an image of a corresponding predetermined region of a frame being referenced when the first coding scheme is performed, and other predetermined region of the first frame of the output motion picture stream which is indicated by the sub-information as being encoded by the intraframe coding scheme is encoded by using the second coding scheme to reference an image of a corresponding predetermined region of other frame which is different from the frame being referenced when the first coding scheme is performed.