Method of operating a remote control system and a remote control system comprising an RF transmission and receiving system
First Claim
1. A method of operating a remote control system comprising an RF transmission and receiving system (6, 12) which comprises a radio transmitter (8) for transmitting an RF signal (10) and a radio receiver (13) for receiving the RF signal (10) transmitted by the radio transmitter (8), said receiver being coupled to an infrared transmitter (14) for transmitting an IR signal (15) on an IR sub-carrier in response to the receipt of said RF signal (10), characterized in that the RF signal as sent comprises an envelope signal (34) containing information on the envelope of the IR signal and a sub-carrier signal (33) separate from the envelope signal containing information about the sub-carrier of the IR signal.
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Accused Products
Abstract
In a method of operating a remote control system and in such a system comprising an RF transmission and receiving system and an IR transmission device the sub-carrier information of the IR signal is transmitted in the RF signal in a signal separate from the envelope information of the IR signal which is contained in a envelope signal.
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Citations
11 Claims
- 1. A method of operating a remote control system comprising an RF transmission and receiving system (6, 12) which comprises a radio transmitter (8) for transmitting an RF signal (10) and a radio receiver (13) for receiving the RF signal (10) transmitted by the radio transmitter (8), said receiver being coupled to an infrared transmitter (14) for transmitting an IR signal (15) on an IR sub-carrier in response to the receipt of said RF signal (10), characterized in that the RF signal as sent comprises an envelope signal (34) containing information on the envelope of the IR signal and a sub-carrier signal (33) separate from the envelope signal containing information about the sub-carrier of the IR signal.
- 6. A remote control system comprising an RF transmission and receiving system (6, 12) comprising a radio transmitter (8) for transmitting an RF signal (10), a radio receiver (13) for receiving an RF signal (10) transmitted by the radio receiver which is coupled to an infrared transmitter (14) for transmitting an IR signal on an IR sub-carrier in response to the receipt of said RF signal, characterized in that the RF transmission and receiving system comprises means for providing the RF signal with an envelope signal (34) containing information on the envelope of the IR signal and a sub-carrier signal (33) separate from the envelope signal containing information about the sub-carrier of the IR signal.
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10. A radio transmitter (8) for transmitting an RF signal (10), comprising an infrared receiver (7) for receiving an IR signal (5) on an IR sub-carrier, characterized in that the radio transmitter comprises means for providing the RF signal with an envelope signal (34) containing information on the envelope of the IR signal and a sub-carrier signal (33) separate from the envelope signal containing information about the sub-carrier of the IR signal.
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11. A radio receiver (13) for receiving an RF signal (10), said receiver being coupled to an infrared transmitter (14) for transmitting an IR signal on an IR sub-carrier in response to the receipt of said RF signal, characterized in that the radio receiver comprises means for decoding from the RF signal an envelope signal (34) containing information on the envelope of the IR signal and a sub-carrier signal (33) separate from the envelope signal containing information about the sub-carrier of the IR signal, and for transmitting the IR signal in accordance with said sub-carrier signal.
Specification