Readable storage medium

A computer-readable storage medium storing thereon a procedure for controlling a computer to play back a storage medium storing one or more still pictures (VOB) and still picture group management information (VOBGI) for managing one or more still pictures (VOB) as a still picture group (VOBG), said procedure comprising the steps of:

• reading out said still picture management information (VOBI) from said still picture group management information (VOBGI) in said storage medium, wherein
• said still picture group management information (VOBGI) is classified into types of still picture management information including:
• a first type of still picture management information (V_I) on a still picture with no audio to be reproduced in synchronism with the reproduction of the still picture,
• a second type of still picture management information (V_OA_I) on a still picture with only an original audio recorded substantially at the same time the still picture was recorded,
• a third type of still picture management information (V_AA_I) on a still picture with only a post-recorded audio added to the still picture already recorded, and
• a fourth type of still picture management information (V_OA_AA_I) on a still picture with both of the original audio and a post-recorded audio added to the still picture already recorded, and said still picture management information (VOBI) has an identifier which indicates said type;
• and
• playing back only the still picture if said identifier is a first identifier, playing back the still picture with the original audio if said identifier is a second identifier, playing back the still picture with the post-recorded audio if said identifier is a third identifier, or playing back the still picture with either of the original audio and the post-recorded audio if said identifier is a fourth identifier.