TRACKING SYSTEM USING AUDIO SIGNALS BELOW THRESHOLD
First Claim
Patent Images
1. A tracking system, comprising:
- a signal generator configured to generate a detection signal, where the detection signal comprises a non-audible sonic signal in an audible frequency range;
a transmitting device configured to transmit the detection signal generated by the signal generator;
a detection device configured to detect the detection signal transmitted by the transmitting device, where either the transmitting device or the detection device is fixed to a headphone unit configured to simulate a surround sound reproduction of audio data, and the other one of the transmitting device and the detection device is located at a fixed position; and
a processing unit configured to determine at least one orientation parameter of the headphone unit based on a transmission time measurement of the detection signal between the transmitting device and the detection device.
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Abstract
A tracking system may determine the orientation or position of a movable object. The tracking system includes a signal generator that generates a non-audible detection signal in an audible frequency range. A transmitting device transmits the detection signal to a detection device. The transmitting device or the detection device may be positioned on the movable object, and the other may be positioned at a remote location. A processor may determine an orientation or position of the moveable object based on the transmission time between the transmitting device and the detection device.
73 Citations
25 Claims
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1. A tracking system, comprising:
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a signal generator configured to generate a detection signal, where the detection signal comprises a non-audible sonic signal in an audible frequency range; a transmitting device configured to transmit the detection signal generated by the signal generator; a detection device configured to detect the detection signal transmitted by the transmitting device, where either the transmitting device or the detection device is fixed to a headphone unit configured to simulate a surround sound reproduction of audio data, and the other one of the transmitting device and the detection device is located at a fixed position; and a processing unit configured to determine at least one orientation parameter of the headphone unit based on a transmission time measurement of the detection signal between the transmitting device and the detection device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A tracking system, comprising:
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a transmitting device configured to transmit a non-audible sonic signal in an audible frequency range; a detection device configured to detect the non-audible sonic signal, where the transmitting device or the detection device is associated with a headphone unit configured to receive audio data and produce a surround sound reproduction of the audio data for a wearer of the headphone unit; and a processing unit configured to determine an orientation or position of the headphone unit based on a transmission time measurement of the non-audible sonic signal between the transmitting device and the detection device, where the processing unit is configured to set at least one characteristic of the audio data for the headphone unit based on the orientation or position of the headphone unit.
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20. A method, comprising to acts of:
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generating a detection signal, where the detection signal comprises a non-audible sonic signal in an audible frequency range; transmitting the detection signal; detecting the detection signal, where transmission or detection of the detection signal occurs at a headphone unit configured to simulate a surround sound reproduction of audio data; and determining at least one orientation parameter of the headphone unit based on a time measurement between the transmission and detection of the detection signal. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification