Patent ID: 7321718

Claim:
A recording medium readable by a recording and/or reproducing apparatus permitting seamless reproduction by the apparatus of data stream data recorded on the recording medium based on arrival time information for the data stream data, the medium comprising: a first area including a plurality of data streams including packet data to which information on the arrival time of the respective packet data is added; and a second area including data stream information including seamless information and/or seamless time control information, the apparatus using the seamless information to determine whether the apparatus seamlessly reproduces a corresponding data stream after playback of a preceding data stream, and the apparatus using the seamless time control information to determine an output time at which the apparatus is controlled to output the corresponding data stream being seamlessly reproduced, wherein: the seamless time control information includes a reference time, offset information and/or gap length information, with the reference time being based on arrival times of packet data of the preceding data stream, and the apparatus uses the reference time to determine the output time at which the apparatus outputs a first packet data of the corresponding data stream being seamlessly reproduced by the apparatus.