Interference prevention for receiver system incorporating RDS-TMC receiver and FM modulator
First Claim
1. A method of operating a receiver system having both an RDS-TMC receiver and an FM modulator, comprising the following steps of:
- starting an operation of the receiver system;
stopping an operation of the FM modulator while continuously operating the RDS-TMC receiver;
examining whether an RDS-TMC ((Radio Data System-Traffic Message Channel) signal from a service provider is available at a current location;
receiving the RDS-TMC signal and retrieving RDS-TMC data therefrom;
sending the retrieved RDS-TMC data to an audio/video system; and
starting the operation of the FM modulator while allowing to output an FM signal from the FM modulator at allowable frequency bands which are outside of a blocked range to send data to the audio/video system;
wherein said blocked range is a frequency range determined based on a frequency band at which the RDS-TMC signal is transmitted in such a way that the frequency band for the FM signal from the FM modulator is sufficiently apart from the frequency band for the RDS-TMC signal, thereby avoiding any interference therebetween.
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Accused Products
Abstract
A method and apparatus prevents interference between a radio signal from RDS-TMC service provider for receiving traffic and travel data by an RDS-TMC receiver and a radio signal for transmitting audio, text, or image data from an FM modulator. The method includes the steps of starting an operation of the receiver system, stopping an operation of the FM modulator while keeping operation of the RDS-TMC receiver, examining whether an RDS-TMC signal from a service provider is available at a current location, receiving the RDS-TMC signal and retrieving RDS-TMC data therefrom, sending the retrieved RDS-TMC data to an audio/video system, and starting the operation of the FM modulator while allowing to output an FM signal from the FM modulator at allowable frequency bands which are outside of a blocked range to send data to the audio/video system.
29 Citations
18 Claims
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1. A method of operating a receiver system having both an RDS-TMC receiver and an FM modulator, comprising the following steps of:
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starting an operation of the receiver system; stopping an operation of the FM modulator while continuously operating the RDS-TMC receiver; examining whether an RDS-TMC ((Radio Data System-Traffic Message Channel) signal from a service provider is available at a current location; receiving the RDS-TMC signal and retrieving RDS-TMC data therefrom; sending the retrieved RDS-TMC data to an audio/video system; and starting the operation of the FM modulator while allowing to output an FM signal from the FM modulator at allowable frequency bands which are outside of a blocked range to send data to the audio/video system; wherein said blocked range is a frequency range determined based on a frequency band at which the RDS-TMC signal is transmitted in such a way that the frequency band for the FM signal from the FM modulator is sufficiently apart from the frequency band for the RDS-TMC signal, thereby avoiding any interference therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for operating a receiver system having both an RDS-TMC receiver and an FM modulator, comprising:
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means for starting an operation of the receiver system; means for stopping an operation of the FM modulator while continuously operating the RDS-TMC receiver; means for examining whether an RDS-TMC ((Radio Data System-Traffic Message Channel) signal from a service provider is available at a current location; means for receiving the RDS-TMC signal and retrieving RDS-TMC data therefrom; means for sending the retrieved RDS-TMC data to an audio/video system; and means for starting the operation of the FM modulator while allowing to output an FM signal from the FM modulator at allowable frequency bands which are outside of a blocked range to send data to the audio/video system; wherein said blocked range is a frequency range determined based on a frequency band at which the RDS-TMC signal is transmitted in such a way that the frequency band for the FM signal from the FM modulator is sufficiently apart from the frequency band for the RDS-TMC signal, thereby avoiding any interference therebetween. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification