Patent ID: 7809238

Claim:
A method of reproducing an after-recorded digital recording medium, comprising the steps of: reading, from a predetermined area of a digital recording medium, a presentation time stamp, the presentation time stamp indicating a time point of a first bit stream of original data that is representative of video and primary audio information that corresponds to and marks a start time of a second bit stream for after recording that is representative of secondary audio information written without being multiplexed with the first bit stream of the original data; reading (1) first address information for a portion of the original data that begins to correspond to the secondary audio information, and (2) second address information for a starting position and an ending position of the secondary audio information; reading the first bit stream of the original data and the second bit stream for after recording in synchronism with each other based on the presentation time stamp and the first and second address information; and decoding the first bit stream of the original data and the second bit stream for after recording.