Video server that adapts video signals from memory to a format c

Details Video server that adapts video signals from memory to a format c Video server that adapts video signals from memory to a format c

1994-11-17

1996-07-23

Metjahic, Safet

Television

Special applications

Manufacturing

348 7, 348 16, H04N 710

Patent

active

055394485

ABSTRACT:
The video server (VS) is used in a video on demand network wherein video signals are transferred over a communication network (TSY) from said video server to terminals thereof. It includes video signal memories (VM), a server control means (SCM), a broadband switch (BS) having first ports (VP1/VPY) to which the memories (VM) are coupled, second ports (CL) coupled to the communication system (TSY) and a third port (CP) to which the server control means (SCM) is coupled. The server control means (SCM) control the transfer of the video signals from the memories (VM) and through the switch (BS) and the communication system (TSY) to the terminals. The broadband switch (BS) has a set of fourth ports (CP1/CPX) to which a set of system adaptor means (SYA1/SYAX) is coupled to adapt the video signals to a format which is compatible with the communication system. The server control means (SCM) performs the transfer of video signals firstly from the video memories (VM) to the system adaptor means (SYA1/SYAX) through the switch (BS) and then from the adaptor means to the terminals via the communication system (TSY). The system adaptor means include channel memories and adaptors to perform rate and format adaption of the video signals respectively. The channel memories and the adaptors can be directly and separately coupled to the broadband switch.

REFERENCES:
patent: 4506387 (1985-03-01), Walter
patent: 4949187 (1990-08-01), Cohen
patent: 5133079 (1992-07-01), Ballantyne et al.
patent: 5214639 (1993-05-01), Herion
M. Fortier, "A Store-And-Forward Architecture for Video-On-Demand Service", 1993, 321.
"System Architecture for a Large Scale Video On Demand Service", W. Sincoskie, Computer Networks and ISDN Systems 22 (1991), North Holland, pp. 155-162.
"Technoloty, Distributed Control and Performance of a Multipath Self-Routing Switch", M. Henrion et al, XIV International Switching Symposium, Yokohama, Oct. 1992, vol. 2, pp. 2-6.

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