Communicating road noise control system, in-vehicle road noise controller, and server
First Claim
1. A communicating road noise control system including an in-vehicle road noise controller and a server that communicate with each other via a communication network, the in-vehicle road noise controller comprising:
- a voice inputting means disposed in a compartment of the vehicle for inputting a voice frequency signal;
a voice outputting means disposed in the vehicle compartment for outputting a received voice signal;
a voice relaying means for outputting, as a transmit signal, the voice frequency signal inputted from the voice inputting means to a telephone means and for outputting the received signal inputted from the telephone means to the voice outputting means;
a present position detection and transmission instructing means for causing an external device to detect the present position of the vehicle and causing the external device to transmit the present position of the vehicle to the server;
a noise spectrum pattern transmitting means for transmitting a noise spectrum pattern to the server;
a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the server; and
a road noise reducing means for reducing road noise based on the noise spectrum pattern received by the noise spectrum pattern receiving means; and
the server comprising;
a present position receiving means for receiving the present position of the vehicle from the external device;
a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the in-vehicle road noise controller;
a noise spectrum pattern optimizing means for analyzing the noise spectrum pattern received by the noise spectrum pattern receiving means to leave a stationary component and cancel a non-stationary component and thereby optimizing the noise spectrum pattern;
a noise spectrum pattern determining means for determining the noise spectrum pattern corresponding to the road surface on which the vehicle is presently running based on the present position of the vehicle received by the present position receiving means and road information stored in a map data storing means;
a noise spectrum pattern outputting means for storing a plurality of different noise spectrum patterns optimized by the noise spectrum pattern optimizing means in correspondence with a plurality of different road surfaces and for selecting the noise spectrum pattern determined by the determining means from among the plurality of noise spectrum patterns and outputting the noise spectrum pattern; and
a noise spectrum pattern transmitting means for transmitting the noise spectrum pattern outputted from the noise spectrum pattern outputting means to the in-vehicle road noise controller.
1 Assignment
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Accused Products
Abstract
Road noise is reduced without locally storing noise spectrum patterns for determination or without detecting the present position of a vehicle from the device. An in-vehicle hands-free device causes a cellular phone to detect the present position of the vehicle and transmit the position to a server. The server determines a noise spectrum pattern corresponding to the road surface on which the vehicle is presently running. The noise spectrum pattern is based on the present position of the vehicle received from the in-vehicle hands-free device and road information. The server transmits the noise spectrum pattern to the in-vehicle hands-free device whereupon a noise canceling signal is superimposed on a received signal. The noise canceling signal is based on an inverted noise spectrum pattern that is obtained by inverting the phase of the noise spectrum pattern. The resulting composite signal is output from a speaker.
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Citations
14 Claims
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1. A communicating road noise control system including an in-vehicle road noise controller and a server that communicate with each other via a communication network, the in-vehicle road noise controller comprising:
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a voice inputting means disposed in a compartment of the vehicle for inputting a voice frequency signal; a voice outputting means disposed in the vehicle compartment for outputting a received voice signal; a voice relaying means for outputting, as a transmit signal, the voice frequency signal inputted from the voice inputting means to a telephone means and for outputting the received signal inputted from the telephone means to the voice outputting means; a present position detection and transmission instructing means for causing an external device to detect the present position of the vehicle and causing the external device to transmit the present position of the vehicle to the server; a noise spectrum pattern transmitting means for transmitting a noise spectrum pattern to the server; a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the server; and a road noise reducing means for reducing road noise based on the noise spectrum pattern received by the noise spectrum pattern receiving means; and the server comprising; a present position receiving means for receiving the present position of the vehicle from the external device; a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the in-vehicle road noise controller; a noise spectrum pattern optimizing means for analyzing the noise spectrum pattern received by the noise spectrum pattern receiving means to leave a stationary component and cancel a non-stationary component and thereby optimizing the noise spectrum pattern; a noise spectrum pattern determining means for determining the noise spectrum pattern corresponding to the road surface on which the vehicle is presently running based on the present position of the vehicle received by the present position receiving means and road information stored in a map data storing means; a noise spectrum pattern outputting means for storing a plurality of different noise spectrum patterns optimized by the noise spectrum pattern optimizing means in correspondence with a plurality of different road surfaces and for selecting the noise spectrum pattern determined by the determining means from among the plurality of noise spectrum patterns and outputting the noise spectrum pattern; and a noise spectrum pattern transmitting means for transmitting the noise spectrum pattern outputted from the noise spectrum pattern outputting means to the in-vehicle road noise controller. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A communicating road noise control system including an in-vehicle road noise controller and a server that communicate with each other via a communication network, the in-vehicle road noise controller comprising:
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a voice inputting means disposed in a compartment of the vehicle for inputting a voice frequency signal; a voice outputting means disposed in the vehicle compartment for outputting a received signal; a voice relaying means for outputting, as a transmit signal, the voice frequency signal inputted from the voice inputting means to a telephone means and for outputting the received signal inputted from the telephone means to the voice outputting means; a present position detecting means for detecting the present position of the vehicle; a present position transmitting means for transmitting the present position of the vehicle detected by the present position detecting means to the server; a noise spectrum pattern transmitting means for transmitting a noise spectrum pattern to the server; a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the server; and a road noise reducing means for reducing road noise based on the noise spectrum pattern received by the noise spectrum pattern receiving means, and the server comprising; a present position receiving means for receiving the present position of the vehicle from the in-vehicle road noise controller; a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the in-vehicle road noise controller; a noise spectrum pattern optimizing means for analyzing the noise spectrum pattern received by the noise spectrum pattern receiving means to leave a stationary component and cancel a non-stationary component and thereby optimizing the noise spectrum pattern; a noise spectrum pattern determining means for determining the noise spectrum pattern corresponding to the road surface on which the vehicle is presently running based on the present position of the vehicle received by the present position receiving means and road information stored in a map data storing means; a noise spectrum pattern outputting means for storing a plurality of different noise spectrum patterns optimized by the noise spectrum pattern optimizing means in correspondence with a plurality of different road surfaces and for selecting the noise spectrum pattern determined by the noise spectrum pattern determining means from among the plurality of different noise spectrum patterns and outputting the noise spectrum pattern; and a noise spectrum pattern transmitting means for transmitting the noise spectrum pattern outputted from the noise spectrum pattern outputting means to the in-vehicle road noise controller. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A server in a communicating road noise control system, the server communicating with an in-vehicle road noise controller so constructed that an external device is caused to transmit the present position of the vehicle to the server and road noise is reduced based on a noise spectrum pattern received from the server, the server comprising:
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a present position receiving means for receiving the present position of the vehicle from the in-vehicle road noise controller; a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the in-vehicle road noise controller; a noise spectrum pattern optimizing means for analyzing the noise spectrum pattern received by the noise spectrum pattern receiving means to leave a stationary component and cancel a non-stationary component and thereby optimizing the noise spectrum pattern; a noise spectrum pattern determining means for determining the noise spectrum pattern corresponding to the road surface on which the vehicle is presently running based on the present position of the vehicle received by the present position receiving means and road information stored in a map data storing means; a noise spectrum pattern outputting means for storing a plurality of different noise spectrum patterns optimized by the noise spectrum pattern optimizing means in correspondence with a plurality of different road surfaces and for selecting the noise spectrum pattern determined by the noise spectrum pattern determining means from among the plurality of different noise spectrum patterns and outputting the noise spectrum pattern; and a noise spectrum pattern transmitting means for transmitting the noise spectrum pattern outputted from the noise spectrum pattern outputting means to the in-vehicle road noise controller.
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14. A server in a communicating road noise control system, the server communicating with an in-vehicle road noise controller so constructed that the present position of the vehicle is transmitted to the server and road noise is reduced based on a noise spectrum pattern received from the server, the server comprising:
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a present position receiving means for receiving the present position of the vehicle from the in-vehicle road noise controller; a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the in-vehicle road noise controller; a noise spectrum pattern optimizing means for analyzing the noise spectrum pattern received by the noise spectrum pattern receiving means to leave a stationary component and cancel a non-stationary component and thereby optimizing the noise spectrum pattern; a noise spectrum pattern determining means for determining the noise spectrum pattern corresponding to the road surface on which the vehicle is presently running based on the present position of the vehicle received by the present position receiving means and road information stored in a map data storing means; a noise spectrum pattern outputting means for storing a plurality of different noise spectrum patterns optimized by the noise spectrum pattern optimizing means in correspondence with a plurality of different road surfaces and for selecting the noise spectrum pattern determined by the noise spectrum pattern determining means from among the plurality of different noise spectrum patterns and outputting the noise spectrum pattern; and a noise spectrum pattern transmitting means for transmitting the noise spectrum pattern outputted from the noise spectrum pattern outputting means to the in-vehicle road noise controller.
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Specification