Mobile device indoor navigation
First Claim
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1. A system for mobile device positioning comprising:
- a mobile device in a venue, the mobile device configured to detect identifying information of plural different audio sources in sound captured through a microphone of the mobile device in the venue, and configured to determine timing information for sound signals from the different audio sources, wherein the timing information comprises the relative arrival time to the mobile device from the different sources; and
a position calculator configured to obtain positions of the different sources from the identifying information, and configured to calculate position of the mobile device from the position of the different sources and the timing information.
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Abstract
An audio playback system receives digitally watermarked audio programming and distributes it to audio speakers in a venue, enabling a variety of location and product dependent services to be delivered to mobile devices in the venue. Mobile devices sense audio from speakers and decode digital identifying information, including characteristics to distinguish audio sources. The mobile device communicates with a networked computer to provide the identifying information, which in turn, triggers an alert for output on the mobile device.
34 Citations
20 Claims
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1. A system for mobile device positioning comprising:
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a mobile device in a venue, the mobile device configured to detect identifying information of plural different audio sources in sound captured through a microphone of the mobile device in the venue, and configured to determine timing information for sound signals from the different audio sources, wherein the timing information comprises the relative arrival time to the mobile device from the different sources; and a position calculator configured to obtain positions of the different sources from the identifying information, and configured to calculate position of the mobile device from the position of the different sources and the timing information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer readable medium, on which is stored instructions, which when executed by a computer, perform a method for mobile device positioning comprising:
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detecting audio source identifying and timing information from an audio signal captured on a microphone; providing the source identifying and timing information to a process for computing position of a mobile device in a venue, the source identifying information identifying plural different audio sources from the audio signal captured on the microphone, and the timing information providing timing of sound signals from the different audio sources; obtaining positions of the plural different audio sources; and calculating the position of the mobile device based on the timing and position of the plural different audio sources. - View Dependent Claims (8, 9)
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10. A method of determining position of a mobile device comprising:
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receiving, at one location, audio signals from two or more different audio sources that overlap in time, in a microphone of the mobile device, wherein the audio signals sound substantially similar to a human listener, yet have different characteristics to distinguish among the different audio sources; distinguishing the audio signals from each other based on distinguishing characteristics determined from the audio signals; determining timing information for sound signals from the different audio sources, wherein the timing information comprises the relative arrival time to the mobile device from the different sources; and based on the distinguishing characteristics and the timing information, determining position of the mobile device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification