Patent ID: 7274860

Claim:
A computer readable recording medium having computer executable instructions, the computer readable recording medium being readable by a reproduction apparatus, and storing thereon: a first system stream having a plurality of video packets and a plurality of audio packets, each of said plurality of video packets carrying a predetermined amount of first encoded video data which is compressed data of video frames, each of said plurality of audio packets carrying a predetermined amount of first encoded audio data which is compressed data of audio frames, wherein each audio frame is a unit to compress audio data, and the presentation time length of one audio frame is different from the presentation time length of one video frame; a second system stream having a plurality of video packets and a plurality of audio packets, each of said plurality of video packets carrying a predetermined amount of second encoded video data which is compressed data of video frames, each of said plurality of audio packets carrying a predetermined amount of second encoded audio data which is compressed data of audio frames, wherein each audio frame is a unit to compress audio data, and the presentation time length of one audio frame is different from the presentation time length of one video frame, one of said first and second system streams being selectively reproduced and presented, wherein said first and second system streams are each divided into a plurality of interleave units and are interleaved; and a navigation pack having audio gap information operable to indicate a duration of an audio discontinuous part appearing in decoded audio data during audio presentation, interleave information operable to indicate that the first and second system streams are interleaved, and address information operable to indicate a starting address of a next interleave unit.