Patent ID: 8886010

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, the generating of the first system time clock sequence for the mainstream data comprises determining an initial value of the first system time clock sequence for the mainstream data based on a program clock reference included in the mainstream data, and the generating of the second system time clock sequence for the sub-audio data comprises determining an initial value of the second system time clock sequence for the sub-audio data based on a program clock reference included in the sub-audio data.