US 5,913,010 AGranted

Information storage medium, recording method used therefor, and reproducing apparatus

AssigneeKabushiki Kaisha Toshiba

InventorsToshihiko Kaneshige, Sigeru Todokoro, Tadashi Kojima

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Abstract

Data on multiple stories or scenes are recorded on a recording medium so as to reduce the physical distance moved by a pickup at playback time and to suppress breaks or disturbances in reproduced video. A multi-scene program having a plurality of optionally selectable branch stories B0, B1, B2, B3, etc., is recorded between a branch point X and a connection point Y. The preceding main story of a video program, made up of video, sound, text and the like, branches off at branch point X to the branch stories, and at connection point Y connects to the succeeding main story in the video program. The recorded state between the branch point X and the connection point Y is such that the branch stories are each divided into multiple cells and the cells of the respective branch stories are recorded time-division multiplexed.

Claims8

Dependent claims

An information recording method of recording on a recording medium a multi-scene program having a plurality of optionally selectable branch scenes between a branch point at which a preceding main scene of a video program comprising video, sound or text or any combination of video, sound and text branches off and a connection point for connection to a succeeding main scene in said video program, comprising:

dividing branch scenes into a number m of cells;
arranging cells of the respective branch scenes to be time-division multiplexed;
and
determining the number of cells, m, such that, supposing that said branch scenes are termed B0, B1, B2, . . . Bi, . . . in the order of decreasing amount of coding, a jump time Tjp between cells in a shortest scene B0 is ##EQU5## where Vi=amount of coding for Bi, Jp=amount of coding over which jump can be made a unit time, M-1=number of other cells between cells for the shortest scene B0, i=story number, and M=number of stories, and "m" represents the number of cells in each branch story;
and
a playback time Tp for a unit cell in the shortest scene Bo is represented by
Tp=(V0/m)/Pr
where Pr=maximum playback rate per unit time at which the playback apparatus plays back said branch scenes, V0=amount of coding for B0;
and
a read time Tr for a unit cell in the shortest scene B0 is represented by
Tr=(V0/m)/Rr
where Rr=read rate of the playback apparatus;
and
from the condition, Tp-Tr>Tjp, that the jump time required to jump to the next cell is shorter than the playback time, the following expression results:
##EQU6## where the number, m, of cells in each branch story is set in accordance with expression (1).

12 more elements

An information playback system comprising:

an information recording medium in which a multi-scene program having a plurality of optionally selectable branch scenes are recorded between a branch point at which a preceding main scene of a video program made up of video and sound and/or text and/or the like branches off and a connection point for connection to a succeeding main scene in said video program, a recorded state between said branch point and aid connection point being such that said branch scenes are each divided into an equal number of interleaved units, the interleaved units of the respective branch scenes being time-division multiplexed,
wherein the spacing between two interleaved units to be played back successively is set to a distance corresponding to a predetermined amount of coding or below, and
wherein each of said interleaved units comprises a set of multiple sectors each of which is an error correcting code (ECC) block having an error correcting code;
and
a playback apparatus for playing back said information recording medium comprising an error correcting unit for subjecting said sectors read from said information recording medium to error correction, a track buffer for receiving an output of said error correcting unit, and a decoder for decoding an output of said trick buffer;
and wherein
the relationship between a size of said interleaved units (ILVU.sub.-- SZ), a transfer rate of data supplied from said error correcting unit to said track buffer (Vr), a transfer rate of data from said track buffer to said decoder (Vo), a jump time containing the time required for a pickup to seek a track and a necessary time (latency time) incident to track seek (Tj) and a data size (b) of one ECC block is defined by
ILVU.sub.-- SZ.gtoreq.{(Tj.times.Vr.times.10.sup.6 +2b)/(2048.times.8).times.Vo/(Vr-Vo) (sectors).
5.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/780,432Filed 7 Jan 1997
Priority: JP 8-0009868 Jan 1996
Granted: 15 Jun 1999
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04N 9/8227
Involving the multiplexing of an additional signal and the colour video signal: the additional signal being at least another television signal
G11B 19/02
Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of…:…
G11B 27/034
Electronic editing of digitised analogue information signals, e.g. audio or video signals: on discs
G11B 27/105
Programmed access in sequence to addressed parts of tracks of operating record carriers: of operating discs