Patent ID: 8644672

Claim:
An image coding apparatus, comprising: inputting means for inputting a multiplexed stream that includes an original video stream, at least another stream, and multimedia coding data for controlling concurrent display of the original video stream and the at least another stream on a common display device; separating means for separating the original video stream and the multimedia coding data from the inputted multiplexed stream; converting means for performing a predetermined conversion process, controlled by coding control information, on the separated video stream to provide a converted video stream; generating means for generating sub-information that includes at least one of a display frame size or an aspect ratio associated with 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 based on the coding control information such that upon display of the converted video stream and the at least another stream concurrently on the common display device and 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 display mismatch between the converted video stream and the at least another stream is avoided, regardless of the predetermined conversion process carried out on the original video stream, using the at least one of a display frame size or an aspect ratio of the original video stream contained in the sub-information in combination with the multimedia coding data; and multiplexing means for generating another multiplexed stream which includes the converted video stream, the at least another stream, and the multimedia coding data.