Patent ID: 6678466
Filing Date: 2004-01-13
Classification: G11B,H04N

Abstract:
A readable and writable optical disc accessible by an apparatus that performs writing, of a video object said readable and writable optical disc comprising:a data area for storing a video object, said the video object comprising: a video stream obtained by encoding a video signal; a first audio stream obtained by encoding an audio signal, and having a bit rate, the first audio stream comprising a number of packs each having a fixed data size; and a second audio stream obtained based on the first audio stream, and having the same bit rate as the first audio stream, the second audio stream comprising the same number of packs as the first audio stream and each pack of the second audio stream having the same fixed data size as each of the packs of the first audio stream, such that the second audio stream is capable of being subsequently dubbed with audio data whose contents differ from contents of audio data of the first audio stream, by the apparatus wherein the video stream and the first and second audio streams are multiplexed with each other; and the video object further comprises identification flags for respectively identifying the first and second audio streams.