Patent ID: 6470460
Filing Date: 2002-10-22
Classification: G11B,H04N

Abstract:
A data stream reproduction apparatus for reproducing data streams, wherein:the data streams include video data streams which include a plurality of video data units; the video data units are respectively associated with first time codes operable to indicate transfer timings at which the respective video data units are input to a buffer; and at least one video data unit is associated with a second time code operable to indicate a video decoding timing at which the at least one video data unit is decoded; said apparatus comprising: a decoder, which includes the buffer, operable to store the video data streams input thereto and then decode the stored video data streams with reference to a reference clock, so as to decode the stored video data streams based on the second time code in such a manner that the at least one video data unit with the second time code is decoded at the video decoding timing; a video data stream supplying arrangement operable to supply the video data streams to the buffer with reference to the reference clock so as to input the video data units at the transfer timings based on the first time codes, respectively; and a controller operable to supply the reference clock to said decoder and said video data stream supplying arrangement; wherein said controller comprises: a system clock generator operable to generate a first clock and a second clock different from the first clock; and a system clock selector operable to selectively output the first and second clocks in such a manner that, during a first period, one of the first and second clocks is supplied as the reference clock both to said video data stream supplying arrangement and said decoder and, during a second period, one of the first and second clocks is supplied to said video data stream supplying arrangement while the other of the first and second clocks is supplied to said decoder.