Patent ID: 8625959

Claim:
An image decoding apparatus, comprising: inputting means for inputting a multiplexed stream that includes a converted video stream generated by performing a predetermined conversion process on an original video stream, at least another stream, multimedia coding data for controlling concurrent display of the original video stream and the at least another stream on a common display device, and sub-information that includes at least one of a display frame size or an aspect ratio of the original video stream and that includes an indicator value representing whether a mismatch is present in a relationship between the converted video stream and the multimedia decoding data as a result of the predetermined conversion process performed on the original video stream; separating means for separating the converted video stream, the at least another stream, and the multimedia coding data from the inputted multiplexed stream; decoding means for decoding the separated video stream; and processing means for performing, in response to the indicator value contained in the sub-information indicating that the mismatch is present in the relationship between the converted video stream and the multimedia decoding data, a predetermined further conversion process on the decoded video stream based on the at least one of a display frame size or an aspect ratio of the original video stream contained in the sub-information such that upon displaying the further converted video stream and the at least another stream concurrently on the common display device, a display mismatch between the further converted video stream and the at least another stream is avoided regardless of the predetermined conversion process carried out on the original video stream.