Recording medium and signal processing apparatus

摘要

A recording medium has a first area storing an audio title set. The audio title set contains a plurality of audio objects including a first audio object and a second audio object. The first audio object includes first audio packs having audio data. The second audio object includes second audio packs having audio data and a real time information pack having real-time information related to the audio data in the second audio packs. The recording medium has a second area storing a still-picture set having a plurality of still-picture units. The still-picture set includes a still-picture pack having still-picture data related to the audio data in the first audio packs and the audio data in the second audio packs. The recording medium further has a third area storing a first audio manager related to the audio data in the first audio packs and the audio data in the second audio packs, the first audio manager including TOC information. Further, there is provided a fourth area storing a second audio manager related to the audio data in the first audio packs and the audio data in the second audio packs, the second audio manager including an audio manger menu for generating a menu and also including audio manager information for controlling the audio title set. Each still-picture unit in the second area includes a first still-picture object and a second still-picture object. The first still-picture object includes the still-picture pack and a sub-picture pack. The sub-picture pack has sub-picture data for displaying a button related to the still-picture data in the still-picture pack. The second still-picture object includes the still-picture pack and does not include the sub-picture pack.