Patent ID: 6278834
Filing Date: 2001-08-21
Classification: G11B,H04N

Abstract:
A reproduction apparatus for use with an optical disc having a data area for storing a video object and a management information area for storing management information, the video object includes a video stream obtained by encoding a video signal, a first audio stream obtained by encoding an audio signal, a second audio stream obtained based on the first audio stream and identification flags respectively provided for the first and second audio streams for identifying the associated audio streams, the video stream and the first and second audio streams being multiplexed with each other, the first audio stream including a plurality of packs each of which has a fixed data size, the second audio stream having the same bit rate as the first audio stream and includes the same number of packs each having the same data size as the packs of the first audio stream, the management information indicating whether or not the second audio stream is rewritten based on an audio signal input for dubbing, the reproduction apparatus comprising:a reproduction means for decoding the first audio stream and the video stream or the second audio stream and the video stream to output the audio signal and the video signal;a receiving means for receiving a users instruction; anda controller operable to determine, when the receiving means receives the user's instruction to output the second audio stream while the first audio stream is output, whether or not the management information indicates that a part or all of the second audio stream has been rewritten, and to control the reproduction means to decode the second audio stream and the video stream when the part or all of the second audio stream is determined to be rewritten.