Acoustic information transfer
Embodiments disclosed herein provide systems and methods for acoustically transferring information between systems. In a particular embodiment, a method provides identifying information for acoustic transfer and determining an amount of time corresponding to the information. The method further provides acoustically transmitting a signal at a first time and, upon the amount of time elapsing since the first time, acoustically transmitting the signal at a second time.
1. A method of acoustically transferring information, comprising:
identifying information for acoustic transfer;
determining an amount of time corresponding to the information;
acoustically transmitting a signal at a first time;
upon the amount of time elapsing since the first time, acoustically transmitting the signal at a second time
receiving the signal transmitted at the first time and the signal transmitted at the second time;
determining a correlation between the signal transmitted at the first time and the signal transmitted at the second time;
determining a time period as a time between peaks resulting from the correlation; and
identifying the information that corresponds to the time period.
2. The method of claim 1 , wherein the amount of time comprises an amount of digital audio samples.
3. The method of claim 2 , wherein the information comprises a number and the number equals the amount of digital audio samples.
4. The method of claim 1 , further comprising:
before the first time, acoustically transmitting two synchronization signals for receiver synchronization, wherein a time period separating the transmission of the two synchronization signals is known to a receiver system.
5. The method of claim 4 , wherein the two synchronization signals comprise two instances of the signal.
6. The method of claim 1 , further comprising:
identifying second information for acoustic transfer;
determining a second amount of time corresponding to the second information; and
upon the second amount of time elapsing since the second time, acoustically transmitting the signal at a third time.
7. The method of claim 1 , wherein the signal comprises frequencies audible to the human ear.
8. A receiver system for acoustically receiving information, comprising:
an acoustic receiver configured to receive a signal at a first time and, after the first time, receive the signal at a second time; and
a processing system configured to:
determine a correlation between the signal transmitted at the first time and the signal transmitted at the second time;
determine a time period as a time between peaks resulting from the correlation; and
identify the information that corresponds to the time period.
9. The receiver system of claim 8 , wherein the time period comprises an amount of digital audio samples.
10. The receiver system of claim 9 , wherein the information comprises a number and the number equals the amount of digital audio samples.
11. The receiver system of claim 8 , further comprising:
the acoustic receiver configured to, before the first time, receive two synchronization signals for receiver synchronization, wherein a time period separating the transmission of the two synchronization signals is known to the receiver system.
12. The receiver system of claim 8 , further comprising:
the acoustic receiver configured to receive the signal at a third time after the second time;
the processing system configured to derive second information based on a second time period between the second time and the third time.
13. A transmitter system for acoustically transferring information, comprising:
a processing system configured to identify information for acoustic transfer and determine an amount of time corresponding to the information;
an acoustic transmitter configured to acoustically transmit a signal at a first time and, upon the amount of time elapsing since the first time, acoustically transmit the signal at a second time; and
wherein a receiver receives the signal transmitted at the first time and the signal transmitted at the second time, determines a correlation between the signal transmitted at the first time and the signal transmitted at the second time, determines a time period as a time between peaks resulting from the correlation, and identifies the information that corresponds to the time period.
14. The transmitter system of claim 13 , wherein the amount of time comprises an amount of digital audio samples.
15. The transmitter system of claim 14 , wherein the information comprises a number and the number equals the amount of digital audio samples.
16. The transmitter system of claim 13 , further comprising:
the acoustic transmitter configured to acoustically transmit, before the first time, two synchronization signals for receiver synchronization, wherein a time period separating the transmission of the two synchronization signals is known to a receiver system.
17. The transmitter system of claim 13 , further comprising:
the processing system configured to identify second information for acoustic transfer and determine a second amount of time corresponding to the second information; and
the acoustic transmitter configured to, upon the second amount of time elapsing since the second time, acoustically transmit the signal at a third time.