| 摘要 |
PROBLEM TO BE SOLVED: To enable various reproduction by recording interactive data accessing bonus information of a musical piece and a disk identifier and permitting the reproduction of the bonus information in the case that the correct interactive data are inputted based on the identifier. SOLUTION: An audio signal is converted into a data train of a PCM signal by an A/D converter 31, is then encoded by a signal processing circuit 32 and a memory 33 and prescribed user data are supplied to a DVD encoding circuit 34. In this encoding circuit 34, a pack header is added to the user data to constitute an audio pack. An identifier showing an enhanced audio is described in a data area and recording information such as a disk identifier showing a DVD-ROM, a music piece, KARAOKE (orchestration without lyrics) information, a BGM signal and bonus information are packed in a read-in area in a prescribed format. On the side of reproduction, whether the interactive data should be inputted or not is discriminated based on the disk identifier. |
