Localization of a Wireless User Equipment (UE) Device Based on Single Beep per Channel Signatures

• US 20140079242A1
• Filed: 09/17/2012
• Published: 03/20/2014
• Est. Priority Date: 09/17/2012
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Nguyen, Nam, Dhakal, Sagar
• Granted Patent: US 9,078,055 B2
• Time in Patent Office: Days
• US Class Current: 381/86
• CPC Class Codes: G10L 19/018 Audio watermarking, i.e. embedding inaudible data in the audio signal
• CPC Class Codes: H04R 2205/024 Positioning of loudspeaker enclosures for spatial sound reproduction
• CPC Class Codes: H04R 5/00 Stereophonic arrangements stereophonic pick-ups H04R9/16, H04R11/12, H04R17/08, H04R19/10
• CPC Class Codes: H04S 7/303 Tracking of listener position or orientation

Abstract

A scheme for localizing a wireless user equipment (UE) device'"'"'s relative position with respect to a spatial configuration based on audio signatures received via a multi-channel audio system, e.g., an audio system of a vehicle or home entertainment system. The wireless UE device is configured to capture the audio signatures from a head unit that are placed in an out-of-hearing band, wherein the audio signatures comprise a single beep per channel that is separately detectable and are simultaneously transmitted by the head unit to the speaker channels. The wireless UE device includes a persistent memory module having program instructions for processing the captured signal including the out-of-band signatures in order to compute time delays. A localization module is configured to estimate the wireless UE device'"'"'s relative position based on the time delays associated with respective speaker channels.

Claims

1. A method operating at a wireless user equipment (UE) device, said method comprising:

capturing a plurality of audio signatures simultaneously transmitted from a head unit and received via an audio transmission system having a plurality of speaker channels, wherein each of said plurality of audio signatures comprises a single beep per speaker channel that is separately detectable in an out-of-hearing band of a captured signal; and

processing said plurality of audio signatures for determining said wireless UE device'"'"'s location relative to a spatial configuration.

2. The method of claim 1 wherein said processing comprises:

performing a Short-Time Fourier Transform analysis to detect an arrival time for each single beep per speaker channel;

based on said arrival time for each single beep per channel, performing a relative ranging process to compute a plurality of time delays corresponding to said plurality of speaker channels; and

estimating said wireless UE device'"'"'s location based on said plurality of said time delays relative to said spatial configuration.

3. The method of claim 1 wherein said out-of-hearing band comprises a frequency range beyond 18 kHz.

4. The method of claim 1 further comprising determining that said plurality of speaker channels comprise two channels.

5. The method of claim 1 further comprising determining that said plurality of speaker channels comprise four channels.

6. The method of claim 1 further comprising deactivating at least a functionality of said wireless UE device based on said wireless UE device'"'"'s location relative to said spatial configuration.

7. The method of claim 6 wherein said at least a functionality of said wireless UE device comprises at least one of call reception, call origination, Short Message Service (SMS) texting, Instant Messaging (IM), a data application, an email application, a word processing application, a camera application, a presence application, gaming application, a music playback application, a video playback application, a social media application, a voice command mode, and a hands-free mode.

8. The method of claim 1 further comprising:

receiving an encoded vehicle information signal from said head unit via at least one of said plurality of speaker channels;

decoding said encoded vehicle information signal to obtain an identity of a vehicle in which said head unit is implemented; and

correlating said identity with a database to determine said spatial configuration.

9. A wireless user equipment (UE) device comprising:

a processor configured to control one or more subsystems of said wireless UE device;

a microphone; and

a persistent memory module having program instructions which, when executed by said processor, perform;

facilitating capture of a plurality of audio signatures by said microphone as a captured signal, wherein said plurality of audio signatures are simultaneously transmitted from a head unit and received via an audio transmission system having a plurality of speaker channels, further wherein each of said plurality of audio signatures comprises a single beep per speaker channel that is separately detectable in an out-of-hearing band of said captured signal; and

processing said plurality of audio signatures for determining said wireless UE device'"'"'s location relative to a spatial configuration.

10. The wireless UE device of claim 9 wherein said persistent memory module further comprises program instructions for:

decoding an encoded vehicle information signal received from said head unit to obtain an identity of a vehicle in which said head unit is implemented, wherein said encoded vehicle information signal is received via at least one of said plurality of speaker channels; and

correlating said identity with a database to determine said spatial configuration.

11. The wireless UE device of claim 9 wherein said persistent memory module further comprises program instructions for deactivating at least a functionality of said wireless UE device based on said wireless UE device'"'"'s location relative to said spatial configuration.

12. The wireless UE device of claim 11 wherein said at least a functionality of said wireless UE device comprises at least one of call reception, call origination, Short Message Service (SMS) texting, Instant Messaging (IM), a data application, an email application, a presence application, a word processing application, a camera application, a gaming application, a music playback application, a video playback application, a social media application, a voice command mode, and a hands-free mode.

13. The wireless UE device of claim 9 wherein said persistent memory module further comprises program instructions for:

performing a Short-Time Fourier Transform analysis to detect an arrival time for each single beep per speaker channel;

based on said arrival time for each single beep per channel, performing a relative ranging process to compute a plurality of time delays corresponding to said plurality of speaker channels; and

estimating said wireless UE device'"'"'s location based on said plurality of said time delays relative to said spatial configuration.

14. The wireless UE device of claim 9 wherein said persistent memory module further comprises program instructions for determining that said plurality of speaker channels comprise two channels.

15. The wireless UE device of claim 9 wherein said persistent memory module further comprises program instructions for determining that said plurality of speaker channels comprise four channels.

16. A head unit comprising:

a processor configured to control one or more subsystems of said head unit;

a plurality of audio signature sources for providing audio signatures in an out-of-hearing band, wherein each of said plurality of audio signatures comprises a single beep per speaker channel and correspond to a plurality of speaker channels; and

an audio output component for facilitating simultaneous transmission of said out-of-hearing band audio signatures via said plurality of speaker channels.

17. The head unit of claim 16 further comprising an encoder for audio encoding identity information associated with a vehicle in which said head unit is implemented.

18. The head unit of claim 16 wherein said out-of-hearing band comprises a frequency range beyond 18 kHz.

19. The head unit of claim 16 wherein said plurality of speaker channels comprise two channels.

20. The head unit of claim 16 wherein said plurality of speaker channels comprise four channels.

21. A non-transitory computer-accessible medium having a sequence of instructions executable by a processing entity of a head unit, said non-transitory computer-accessible medium comprising:

a code portion for facilitating generation of a plurality of audio signatures corresponding to a plurality of speaker channels associated with said head unit, wherein each of said plurality of audio signatures comprises a single beep per speaker channel placed within an out-of-hearing band; and

a code portion for facilitating simultaneous transmission of said out-of-hearing band audio signatures via said plurality of speaker channels.

22. The non-transitory computer-accessible medium of claim 21 wherein said out-of-hearing band comprises a frequency range beyond 18 kHz and said non-transitory computer-accessible medium further comprises a code portion for audio encoding identity information associated with a vehicle in which said head unit is implemented.