Music-based positioning aided by dead reckoning
View Patent ↗Music-based positioning (MP) provides positioning service only sporadically. To continuously provide positioning service, the present invention discloses music-based positioning aided by dead reckoning (MP-DR). At each signature burst (i.e., a highly unique short musical segment suitable for positioning), sounds of a music piece or a human speech are used for positioning. Between signature bursts, dead reckoning (DR) is used.
1. An apparatus for continuously determining a geographic area of said apparatus using sounds of a music piece including first and second signature bursts separated a first non-signature interval and followed by a second non-signature interval, comprising:
an acoustic-positioning (AP) module for determining a first position of said apparatus at said first signature burst and a second position of said apparatus at said second signature burst by correlating received audio signals and transmitted audio signals;
a dead-reckoning (DR) module for determining locations of said apparatus by using said first position as a first initial location for dead reckoning during said first non-signature interval and using said second position as a second initial location for dead reckoning during said second non-signature interval;
wherein said music piece does not include any audible alarm or chirp.
2. The apparatus according to claim 1 , wherein said first or second signature burst has a correlativity higher than a pre-determined value.
3. The apparatus according to claim 2 , wherein the correlativity of a signature burst is the ratio of the peak value and the root-mean-square (rms) value of the auto-correlation function of said signature burst.
4. The apparatus according to claim 1 , further comprising a memory for storing a signature-burst meta-data associated with said music piece.
5. The apparatus according to claim 1 , further comprising a memory for storing content data for said music piece.
6. The apparatus according to claim 1 , wherein said AP module further comprises a signal generator for generating a replica of said transmitted audio signals.
7. The apparatus according to claim 1 , wherein said AP module measures the time-of-flight of said received audio signals with respect to said transmitted audio signals.
8. The apparatus according to claim 1 , wherein said sounds of said music piece are simultaneously generated by at least two sound-transmitting devices.
9. The apparatus according to claim 8 , wherein said AP module measures the time-difference-of-flight of said received audio signals.
10. The apparatus according to claim 1 , wherein said DR module comprises at least an accelerometer, a compass and/or a gyroscope.
11. An apparatus for continuously determining a geographic area of said apparatus using sounds of a human speech including first and second signature bursts separated a first non-signature interval and followed by a second non-signature interval, comprising:
an acoustic-positioning (AP) module for determining a first position of said apparatus at said first signature burst and a second position of said apparatus at said second signature burst by correlating received audio signals and transmitted audio signals;
a dead-reckoning (DR) module for determining locations of said apparatus by using said first position as a first initial location for dead reckoning during said first non-signature interval and using said second position as a second initial location for dead reckoning during said second non-signature interval;
wherein said human speech does not include any audible alarm or chirp.
12. The apparatus according to claim 11 , wherein said first or second signature burst has a correlativity higher than a pre-determined value.
13. The apparatus according to claim 12 , wherein the correlativity of a signature burst is the ratio of the peak value and the root-mean-square (rms) value of the auto-correlation function of said signature burst.
14. The apparatus according to claim 11 , further comprising a memory for storing a signature-burst meta-data associated with said human speech.
15. The apparatus according to claim 11 , further comprising a memory for storing content data for said human speech.
16. The apparatus according to claim 11 , wherein said AP module further comprises a signal generator for generating a replica of the transmitted audio signals.
17. The apparatus according to claim 11 , wherein said AP module measures the time-of-flight of said received audio signals with respect to said transmitted audio signals.
18. The apparatus according to claim 11 , wherein said sounds of said human speech are simultaneously generated by at least two sound-transmitting devices.
19. The apparatus according to claim 18 , wherein said AP module measures the time-difference-of-flight of said received audio signals.
20. The apparatus according to claim 11 , wherein said DR module comprises at least an accelerometer, a compass and/or a gyroscope.