Multimedia on-demand server having different transfer rates

Details Multimedia on-demand server having different transfer rates Multimedia on-demand server having different transfer rates

1995-06-06

1998-05-19

Ray, Gopal C.

Multiplex communications

Wide area network

Packet switching

39520077, 395615, 370468, G06F 15173, H04N 7173, H04J 322

Patent

active

057547734

ABSTRACT:
A multimedia on-demand server including a randomly-accessible library of multimedia programs (such as movies stored on magnetic or optical disks), a limited amount of RAM to buffer and store selected portions of programs retrieved from the library, and an interface that switchably routes program material from the library and RAM buffers to an audience of viewers. The server employs a restricted retrieval strategy and a novel storage allocation scheme that enable different portions of one or more programs to be continuously retrieved and selectively routed to a large number of on-demand viewers, while at the same time minimizing the amount of the RAM required to effect this service. The on-demand server also responds to viewer-generated commands to control the viewing of a program. In a particular embodiment, these commands include video tape player-like operations such as fast-forward, rewind and pause.

REFERENCES:
patent: 5367522 (1994-11-01), Otani
patent: 5519435 (1996-05-01), Anderson
patent: 5543861 (1996-08-01), Harradine et al.
patent: 5550577 (1996-08-01), Verbiest et al.
patent: 5566208 (1996-10-01), Balakrishnan
patent: 5572645 (1996-11-01), Dan et al.
patent: 5583561 (1996-12-01), Baker et al.
patent: 5600573 (1997-02-01), Hendricks et al.

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