Television signal and atm cell switching system

H - Electricity – 04 – N

Patent

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Details

H04N 7/00 (2006.01) H04L 12/56 (2006.01) H04M 11/06 (2006.01) H04N 7/173 (2006.01) H04N 7/24 (2006.01) H04N 7/58 (2006.01) H04N 7/60 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2068387

A television signal and ATM cell switching system for switching ATM cells of data other than television signals and for supplying one channel among a plurality of channels of television signals transmitted from a source to a subscriber to carry out one-way communication of the television signals from the source to the subscribers and two-way communication of the data other than the television signals between the network and the subscribers comprising, a television signal transmitting means (4) for transmitting television signals in the form of ATM cells, an ATM switching means (3) for switching ATM cell data other than the television signals, a television signal cell inserting circuit (1) for receiving a plurality of channels of the television signals from the television signal transmitting means (4), and for receiving the ATM cell data other than the television signals after being switched by the ATM switching means (3), the television signal inserting circuit (1) comprising, a demultiplexing circuit (10) for demultiplexing the output of the ATM switching means (3) to provide a plurality of outputs corresponding to respective subscribers, and a plurality of multiplexing circuits (11) each for multiplexing the demultiplexed ATM cell received from one corresponding output of the demultiplexing circuit (10) and one channel of the ATM cells selected in accordance with a request from the corresponding subscriber.

L'invention est un système de commutation de signaux de télévision et de cellules MTA servant à commuter des cellules MTA de signaux autres que les signaux de télévision et à alimenter un canal parmi une pluralité de canaux de télévision avec des signaux transmis d'une source à un abonné pour établir une transmission unidirectionnelle de signaux de télévision de cette source à l'abonné et une transmission bidirectionnelle de signaux autres que les signaux de télévision entre le réseau et les abonnés. Le système de l'invention comprend un dispositif d'émission de signaux de télévision (4) sous la forme de cellules MTA, un dispositif de commutation MTA (3) servant à commuter des cellules MTA de signaux autres que les signaux de télévision, un circuit d'insertion de cellules de signaux de télévision (1) servant à recevoir une pluralité de signaux de télévision transmis par le dispositif d'émission de signaux de télévision (4) et à recevoir les cellules MTA de signaux autres que les signaux de télévision après commutation par le dispositif de commutation MTA (3), ce circuit d'insertion de signaux de télévision (1) comportant un circuit démultiplexeur (10) servant à démultiplexer le signal de sortie du dispositif de commutation MTA (3) pour produire un pluralité de signaux destinés aux abonnés individuels et une pluralité de circuits multiplexeurs (11) servant individuellement à multiplexer la cellule MTA démultiplexée reçue à la sortie correspondante du circuit démultiplexeur (10) et l'un des canaux des cellules MTA sélectionné par l'abonné correspondant.

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