Patent ID: 6381404
Filing Date: 2002-04-30
Classification: G11B,H04N

Abstract:
A digital versatile disc (DVD) method for multi-block, read-ahead operations in which a DVD player reads and caches data of a DVD bitstream from a DVD source, the DVD player including a cache capable of holding a number (N2) of data blocks, the method comprising:A) fetching a navigation pack (NAV-PCK) from a DVD disc; B) processing information contained in the NAV-PCK block of a VOBU in the DVD bitstream, the VOBU including a number (N1) of blocks of data in addition to the NAV-PCK, and extracting from the NAV-PCK information specifying the number (N1) of data blocks in the VOBU; C) in response to the NAV-PCK information, performing a plurality of read operations with respect to data located in more than one block of the DVD disc, the read operation comprising: C1) reading only data within a single VOBU and within a single DVD title, C2) reading a plurality of the data blocks of the VOBU from the DVD disc, the read data blocks being less in number than the total number (N1) of data blocks in the VOBU and not greater than the number (N2) of data blocks that the cache can hold; and C3) repeating step (02) until all N1 blocks of the VOBU have been read; and D) placing the read data in a cache.