Patent ID: 8131129

Claim:
A decoding method for reproducing data from an optical disc to provide a browsable slide show, the decoding method comprising: reading, from the optical disc, a playlist comprising a playitem that provides a main presentation of the playlist and a subplayitem that provides an auxiliary presentation associated with the main presentation; reading, from the optical disc, mainstream data corresponding to the playitem and sub-audio data corresponding to the subplayitem using the playlist; generating a first system time clock sequence for the mainstream data to control the decoding time of the mainstream data; decoding the mainstream data according to the first system time clock sequence for the mainstream data; generating a second system time clock sequence for the sub-audio data to control the decoding time of the sub-audio data; and decoding the sub-audio data according to the second system time clock sequence for the sub-audio data, the second system time clock sequence being independent of the first system time clock sequence, wherein a sub-audio data presentation is not synchronized with a mainstream data presentation.