IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0105676
(2002-03-25)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
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인용정보 |
피인용 횟수 :
48 인용 특허 :
66 |
초록
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A tracking unit for a vehicle may include a vehicle position determining device, a wireless communications device, and a controller cooperating with the wireless communications device and the vehicle position determining device to determine and send vehicle position information to a monitoring stati
A tracking unit for a vehicle may include a vehicle position determining device, a wireless communications device, and a controller cooperating with the wireless communications device and the vehicle position determining device to determine and send vehicle position information to a monitoring station. The controller may store a user selected reference location and send the vehicle position information based upon the vehicle moving beyond a radial threshold distance from the user selected reference location. More particularly, the vehicle position information may be sent a threshold time after the vehicle moves beyond the radial threshold distance from the user selected reference location if the vehicle has not moved back within the radial threshold distance. Additionally, the vehicle tracking unit may further include at least one input device to be positioned within the vehicle for setting the user selected reference location.
대표청구항
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A tracking unit for a vehicle may include a vehicle position determining device, a wireless communications device, and a controller cooperating with the wireless communications device and the vehicle position determining device to determine and send vehicle position information to a monitoring stati
A tracking unit for a vehicle may include a vehicle position determining device, a wireless communications device, and a controller cooperating with the wireless communications device and the vehicle position determining device to determine and send vehicle position information to a monitoring station. The controller may store a user selected reference location and send the vehicle position information based upon the vehicle moving beyond a radial threshold distance from the user selected reference location. More particularly, the vehicle position information may be sent a threshold time after the vehicle moves beyond the radial threshold distance from the user selected reference location if the vehicle has not moved back within the radial threshold distance. Additionally, the vehicle tracking unit may further include at least one input device to be positioned within the vehicle for setting the user selected reference location. n of the composite audio signal; wherein each autocorrelation value is calculated over a time interval of a corresponding data symbol. 3. The method of claim 1, wherein: the first control message designates a time for triggering the desired action. 4. The method of claim 1, wherein: the first control message designates the desired action. 5. The method of claim 1, wherein: the composite audio signal is communicated to the device, at least in part, by propagating via a speaker. 6. The method of claim 1, wherein: in said embedding step, the first control message is embedded in the audio source signal so that the desired action is triggered in synchronism with a desired content of the audio source signal. 7. The method of claim 1, wherein: in said embedding step, the first control message is embedded in the audio source signal so that the desired action is triggered in synchronism with a desired content of a video signal that is associated with the audio source signal. 8. The method of claim 1, wherein: in said communicating step, the composite audio signal is communicated, at least in part, via a broadcast channel. 9. The method of claim 1, wherein: the composite audio signal is stored at a storage device and subsequently retrieved from the storage device for said communicating step at a designated time for triggering the desired action. 10. The method of claim 1, wherein: a time gate for triggering the desired action is defined in accordance with the first control message. 11. The method of claim 10, wherein: a start of the time gate is defined according to the first control message. 12. The method of claim 10, wherein a start of the time gate is defined according to the first control message, comprising the further step of: embedding a second control message as a corresponding second watermark following the first watermark in the audio source signal; wherein an end of the time gate is defined according to the second control message. 13. The method of claim 10, wherein: a start of the time gate is defined according to the first control message, and an end of the time gate is defined according to a fixed gate interval that follows the start. 14. The method of claim 10, wherein: the first watermark comprises a countdown data field for defining a start of the time gate according to a multiple of a duration of the first watermark. 15. The method of claim 10, wherein: a start of the time gate is defined according to the first control message, and an end of the time gate is defined according to a multiple of a fixed gate interval that follows the start. 16. The method of claim 10, comprising the further step of: embedding at least a second watermark in the audio source signal following said first watermark; wherein each watermark comprises a countdown data field for defining a start of the time gate according to a multiple of a duration of each watermark. 17. The method of claim 16, wherein: the countdown data field of only one of the watermarks is required to define the start. 18. The method of claim 1, wherein: the first control message is embedded in the audio source signal according to a steganographic key to control access to the first control message. 19. The method of claim 18, wherein: the device is adapted to use the steganographic key in recovering the embedded first control message. 20. The method of claim 1, wherein: the desired action is to change a state of the device. 21. The method of claim 20, wherein: the state of the device is changed to control access to the device. 22. A method for enabling a device to perform a desired action via remote control, comprising the steps of: receiving a composite audio signal communicated to the device; and recovering at least a first control message embedded in the composite audio signal to perform the desired action; wherein: the first control message is embedded as a corresponding first watermark in an audio source signal to pr ovide the composite audio signal;the first watermark is carried substantially inaudibly in the composite audio signal; andthe first watermark and the audio source signal coexist in the composite audio signal in a common time, frequency and space domain.23. A method for defining, by remote control, a time gate for a device, during which an access state of the device is changed, comprising the steps of: embedding at least a first control message for changing the access state of the device as a corresponding first watermark in an audio source signal to provide a composite audio signal, said first watermark being carried substantially inaudibly in the composite audio signal; and communicating the composite audio signal to the device; wherein the device is adapted to receive the composite audio signal communicated thereto and recover the first control message embedded therein for changing the access state in accordance therewith. 24. The method of claim 23, wherein: the access state is changed from: (a) not allowing a user input to control the device outside the time gate, to (b) allowing a user input to control the device during the time gate. 25. The method of claim 23, wherein: the access state is changed from allowing a user input to control the device outside the time gate to not allowing a user input to control the device within the time gate. 26. The method of claim 23, wherein: the access state is changed to allow a user to actuate a key to control the device during the time gate. 27. The method of claim 23, wherein: the access state is changed to allow a user to actuate an electronic interface to control the device during the time gate. 28. The method of claim 23, wherein: the composite audio signal is communicated to the device, at least in part, via propagation from a speaker. 29. The method of claim 23, wherein a start of the time gate is defined according to the first control message, comprising the further step of: embedding a second control message as a corresponding second watermark following the first watermark in the audio source signal; wherein an end of the time gate is defined according to the second control message. 30. A method for defining, by remote control, a time gate at a device during which an access state of the device is changed, comprising the steps of: receiving a composite audio signal communicated to the device; and recovering at least a first control message embedded in the composite audio signal for use in changing the access state of the device; wherein: the first control message is embedded as a corresponding first watermark in an audio source signal to provide the composite audio signal; andthe first watermark is carried substantially inaudibly in the composite audio signal.31. A method for remotely controlling a device, comprising the steps of: embedding, at an encoder, at least a first control message for triggering a desired action of the device as a corresponding first watermark in an audio source signal to provide a composite audio signal; embedding clock data into the audio source signal according to an associated clock of the encoder; wherein the first watermark and clock data are carried substantially inaudibly in the composite audio signal; and communicating the composite audio signal to the device; wherein the device is adapted to receive the composite audio signal communicated thereto, recover the embedded clock data and compare it to associated clock data of the device, and, if a difference between the recovered clock data and the device's associated clock data is within a predefined bounds, recover the first embedded control message for triggering the desired action in accordance therewith. 32. The method of claim 31, comprising the further step of: synchronizing the device's associated clock data with the encoder's associated clock data if the difference is within the predefined bounds. 33. The method of claim 31, comprising the fur
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