Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-04-20
2001-08-07
Garber, Wendy R. (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C725S087000
Reexamination Certificate
active
06272281
ABSTRACT:
Conventional cable tv systems deliver video data from a distribution company through a cable to a number of monitors of viewers. Although nowadays many programs are distributed through many channels by each cable tv company, the user or viewer has to wait until the desired program is started and transmitted through a selected channel.
Recently, also interactive video systems have been proposed. in such interactive video system a viewer can chose a desired movie to be displayed on a monitor. In such video-on-demand system a direct connection to the monitor or end device of a user is established, whereafter a demanded movie can be viewed by the end user.
In this known system it is however virtually impossible to upscale the system after it has been established e.g. at a distribution company. When the number of members for such a system increases ad the number of demanded videos is increased, a new interactive video system has to be built.
The present invention provides a storage medium unit for recording of storing data, wherein the data are divided in a predetermined number of data groups, wherein the first portion of the data groups are memorized on every N (N=1, 2, 3, , . . . ) track of a recording medium and the remaining portions of the data groups are memorized on remaining tracks of the recording medium.
The storage medium unit according to the present invention provides for an interactive video system wherein the waiting time for a video-on-demand request can be reduced.
The present invention also provides a video service system comprising
a storage medium unit for recording video data, wherein said video data are divided in a predetermined number of data groups, wherein the predetermined number of data groups are recorded in a sequence different from the original sequence; and
at least one ATM switch supplied with the data group from the storage medium unit for delivering a continuous video data stream to a plurality of end devices by switching virtual channels.
The ATM switch provides for delivering a continuous video data stream. The basics and standards of ATM (Asynchronous Transfer Mode) are laid down in recommendations I.150 and I.327 as published on Mar. 1993 by the International Telecommunication Union. ATM is generally used for addressing a specific packet-oriented transfer mode which uses asynchronous time division multiplexing techniques. The multiplexed information flow is organized into blocks of fixed size called cells. A cell consists of an information field and a header. The primary role of the header is to identify cells belonging to the same virtual channel within the asynchronous time division multiplex.
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Patent Abstract of Japan, vol. 18, No. 608, Nov. 18, 1994, of Japan 06 233242 Aug. 19, 1994.
Copejans Gert
De Vos Johan
Goguey Pascal
Frommer William S.
Frommer Lawrence & Haug LLP.
Garber Wendy R.
Onuaku Christopher
Simon Darren M.
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