Mobile phone hand-free extension device
First Claim
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1. A hand-free extension device to support a mobile phone capable of networking with a personal area network (PAN) and communicating with a car stereo, comprising:
- a PAN wireless transceiver having a processor and a cellular audio signal output; and
a sound source selecting switch coupled to the cellular audio signal and to a car stereo audio signal, the switch controlled by the processor to apply power to the car stereo and to route the cellular or the car stereo audio signals to one or more car speakers.
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Abstract
A hand-free extension device to support a mobile phone capable of networking with a personal area network (PAN) includes a PAN wireless transceiver having a processor and a cellular audio signal output; and a sound source selecting switch coupled to the cellular audio signal and to a car stereo audio signal, the switch controlled by the processor to route the cellular or the car stereo audio signals to one or more car speakers.
55 Citations
20 Claims
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1. A hand-free extension device to support a mobile phone capable of networking with a personal area network (PAN) and communicating with a car stereo, comprising:
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a PAN wireless transceiver having a processor and a cellular audio signal output; and
a sound source selecting switch coupled to the cellular audio signal and to a car stereo audio signal, the switch controlled by the processor to apply power to the car stereo and to route the cellular or the car stereo audio signals to one or more car speakers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method to provide hand-free calling with a mobile phone capable of networking with a personal area network (PAN) and an FM radio receiver, comprising:
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receiving a car stereo audio signal;
receiving a cellular audio signal using the PAN; and
determine the channel frequency setting of the FM radio receiver, including;
generating an electrical signal with a particular pattern;
modulating an FM carrier at a frequency within a commercial FM band with said electrical signal;
transmitting said modulated FM carrier to said FM radio receiver;
receiving an audio signal reproduced by said FM radio receiver and detecting said particular pattern;
determining if the frequency of said FM carrier matches that of said FM radio frequency receiver by the successful detection of said particular pattern; and
changing the frequency of said FM carrier and repeating above steps until the frequency of said FM carrier matches that of said FM radio receiver;
routing one of the cellular audio signal through the FM radio receiver to one or more car speakers during a telephone call. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 20)
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19. A method to provide hands-free conversation for a cellular telephone call, comprising:
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turning on a car stereo equipment if the car stereo equipment is initially off;
receiving cell phone audio over a personal area network (PAN);
routing cell phone audio to a car speaker during the cellular telephone call; and
routing the car stereo equipment signal to the car speaker when the call ends.
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Specification