Patent ID: 6181869
Filing Date: 2001-01-30
Classification: G11B,H04N

Abstract:
A recording disk comprising:a data area storing a multi-scene video program having a plurality of optionally selectable branch scenes recorded in recording tracks, said plurality of branch scenes being divided as m interleaved units in a storage section of the multi-scene program, and the interleaved units of respective branch scenes being arranged on the tracks in a physically-mixed state, each of said interleaved units comprising a navigation pack located at a start position thereof and serving as control data for reproducing data from said data area, said navigation pack including information indicative of the mixed-state arrangement of interleaved units of different scenes, and addresses of next interleaved units which are jump destinations of each scene, and whereineach of said interleaved units corresponds to a video playback time of predetermined length and includes a plurality of compressed video packets and a plurality of compressed audio packets, and whereinsaid branch scenes are assigned as B0, B1, B2, . . . Bi, . . . in the order of decreasing amount of coding and Vi denotes the amount of coding for Bi, Rr denotes a read rate of a playback apparatus, Pr denotes a maximum playback rate per unit time at which the playback apparatus plays back said branch scenes, Jp denotes the amount of coding over which a jump can be made at a unit time, M-1 denotes the number of other interleaved units which are inserted between interleaved units that are time-division multiplexed in the shortest scene B0, and given the above variable assignments, a jump time Tjp between interleaved units in the shortest branch scene B0 is defined as: ##EQU5##a shortest playback time Tp for a unit interleaved unit in the shortest branch scene B0 is expressed as:(VO/m)/Pr, anda read time Tr for a unit interleaved unit in the shortest branch scene B0 is expressed as:(VO/m) Rrand assuming that Tp-Tr>TJP, or a jump time required for jumping to the next cell is shorter than the playback time, the number m of said interleaved units is determined according to the following formula: ##EQU6##where i is a branch scene number, and M is the number of scenes.