Music-Based Positioning Aided By Dead Reckoning
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 thereof using sounds of a music piece comprising first and second signature bursts separated by a non-signature interval, comprising:
acoustic-positioning (AP) module for determining a position of said apparatus at said first and second signature bursts;
a dead-reckoning (DR) module for determining a location of said apparatus by using said position as an initial location for dead reckoning during said non-signature interval.
2 . The mobile device according to claim 1 , wherein said first or second signature burst has a correlativity higher than a pre-determined value.
3 . The mobile device 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 the signature burst.
4 . The mobile device according to claim 1 , further comprising a memory for storing the content data for said music piece.
5 . The mobile device according to claim 4 , wherein said memory stores a signature-burst meta-data associated with said music piece.
6 . The mobile device according to claim 4 , wherein said AP module further comprises a correlating element for calculating a correlation function between the received audio signals and the transmitted audio signals.
7 . The mobile device according to claim 6 , wherein said AP module measures the time-of-flight of said received audio signals with respect to said transmitted audio signals.
8 . The mobile device according to claim 1 , wherein said sounds of said music piece are simultaneously generated by at least two sound-transmitting devices.
9 . The mobile device according to claim 8 , wherein said AP module measures the time-difference-of-flight of said received audio signals.
10 . The mobile device 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 thereof using sounds of a human speech comprising first and second signature bursts separated by a non-signature interval, comprising:
acoustic-positioning (AP) module for determining a position of said apparatus at said first and second signature bursts;
a dead-reckoning (DR) module for determining a location of said apparatus by using said position as an initial location for dead reckoning during said non-signature interval.
12 . The mobile device according to claim 11 , wherein said first or second signature burst has a correlativity higher than a pre-determined value.
13 . The mobile device 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 the signature burst.
14 . The mobile device according to claim 11 , further comprising a memory for storing the content data for said human speech.
15 . The mobile device according to claim 14 , wherein said memory stores a signature-burst meta-data associated with said human speech.
16 . The mobile device according to claim 14 , wherein said AP module further comprises a correlating element for calculating a correlation function between the received audio signals and the transmitted audio signals.
17 . The mobile device according to claim 16 , wherein said AP module measures the time-of-flight of said received audio signals with respect to said transmitted audio signals.
18 . The mobile device according to claim 11 , wherein said sounds of said music piece are simultaneously generated by at least two sound-transmitting devices.
19 . The mobile device according to claim 18 , wherein said AP module measures the time-difference-of-flight of said received audio signals.
20 . The mobile device according to claim 11 , wherein said DR module comprises at least an accelerometer, a compass and/or a gyroscope.