Mobile Device Localization Using Audio Signals
First Claim
1. A computer-implemented method of localizing a mobile device, comprising:
- receiving, at a processor, a first audio signal captured by a microphone located at the mobile device;
receiving, at the processor, a second audio signal captured from a further microphone;
computing a correlation value for the first audio signal and second audio signal; and
determining whether the mobile device is in proximity to the further microphone using the correlation value.
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Accused Products
Abstract
Mobile device localization using audio signals is described. In an example, a mobile device is localized by receiving a first audio signal captured by a microphone located at the mobile device and a second audio signal captured from a further microphone. A correlation value between the first audio signal and second audio signal is computed, and this is used to determine whether the mobile device is in proximity to the further microphone. In one example, the mobile device can receive the audio signals from the further microphone and calculate the correlation value. In another example, a server can receive the audio signals from the mobile device and the further microphone and calculate the correlation value. In examples, the further microphone can be a fixed microphone at a predetermined location, or the further microphone can be a microphone located in another mobile device.
40 Citations
20 Claims
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1. A computer-implemented method of localizing a mobile device, comprising:
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receiving, at a processor, a first audio signal captured by a microphone located at the mobile device; receiving, at the processor, a second audio signal captured from a further microphone; computing a correlation value for the first audio signal and second audio signal; and determining whether the mobile device is in proximity to the further microphone using the correlation value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17)
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15. A mobile device, comprising:
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a microphone arranged to capture a first audio signal from the vicinity of the mobile device; a communication interface arranged to receive a second audio signal captured from a further microphone; a processor connected to the microphone and the communication interface, and arranged to compute a correlation value for the first audio signal and second audio signal, and determine whether the mobile device is in proximity to the further microphone using the correlation value. - View Dependent Claims (16, 18)
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19. An indoor positioning system, comprising:
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a plurality of fixed microphones, each located in a different room of an indoor environment, and each arranged to capture audio signals from its respective room; a wireless interface arranged to receive an audio signal from a mobile device having a microphone arranged to capture the audio signal from the vicinity of the mobile device; and a computing device connected to the plurality of fixed microphones and the wireless interface, and arranged to receive each of the fixed microphone audio signals and the mobile device audio signal, compute a correlation between the mobile device audio signal and each of the fixed microphone audio signals, determine a selected fixed microphone providing the audio signal having the highest degree of correlation with the mobile device audio signal, and outputting the room associated with the selected fixed microphone as the mobile device location. - View Dependent Claims (20)
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Specification