System and Method for Real-Time Wireless Transmission of Digital Audio at Multiple Radio Frequencies

• US 20100022189A1
• Filed: 07/24/2008
• Published: 01/28/2010
• Est. Priority Date: 07/24/2008
• Status: Active Grant

• Current Assignee: Yamaha Guitar Group, Inc. (Yamaha Corporation)
• Original Assignee: Line 6, Inc. (Yamaha Corporation)
• Inventors: Purcell, James, Coker, Guy, Ryle, Marcus
• Granted Patent: US 9,203,533 B2
• Time in Patent Office: Days
• US Class Current: 455/41.300
• CPC Class Codes: H04H 20/33 by plural channels
• CPC Class Codes: H04H 20/61 for local area broadcast, e.g. instore broadcast
• CPC Class Codes: H04H 40/27 specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95

Abstract

Disclosed is a system and method for the real-time wireless transmission of digital audio signals. A transmitter including a processor may be used to: generate a first digital data stream and a second digital data stream from a digital audio signal and transmit the first digital data stream at a first radio frequency and the second digital data stream at a second radio frequency. A receiver including a processor may be utilized to: receive the first and second digital data streams at the first and second radio frequencies, respectively, and generate the digital audio signal from the first and second digital data streams.

Claims

1. A system for the wireless transmission of a digital audio signal comprising:

a transmitter including a processor to;

generate a first digital data stream and a second digital data stream from a digital audio signal; and

transmit the first digital data stream at a first radio frequency and the second digital data stream at a second radio frequency; and

a receiver including a processor to;

receive the first and second digital data streams at the first and second radio frequencies, respectively; and

generate the digital audio signal from the first and second digital data streams.

2. The system of claim 1, wherein the first and second digital streams generated by the transmitter for transmission at the first and second radio frequencies are redundant data.

3. The system of claim 1, wherein the first and second digital streams generated by the transmitter for transmission at the first and second radio frequencies are interleaved data.

4. The system of claim 3, wherein the interleaved data includes data samples that are alternated at the first and second radio frequencies such that if an interference occurs at one of the first or second radio frequencies, the digital audio signal at the receiver is re-constructed by interpolating between the data samples on the one of the first or second radio frequencies that is not subject to interference

5. The system of claim 1, wherein a musical instrument is coupled to the transmitter and a play-back device is coupled to the receiver.

6. The system of claim 5, wherein the musical instrument contains the transmitter.

7. The system of claim 5, wherein the play-back device contains the receiver.

8. The system of claim 5, wherein the musical instrument is a digital musical instrument and generates the digital audio signal.

9. The system of claim 5, wherein the musical instrument is an analog musical instrument and generates an analog audio signal, and the transmitter further comprises an analog to digital converter to convert the analog audio signal into the digital audio signal.

10. The system of claim 5, wherein the musical instrument is connected to the receiver via the transmitter for a live performance.

11. The system of claim 10, wherein sizes of the first and second digital data stream and frequencies of the first and radio frequency are selected to ensure a low latency generation of the digital audio signal at the receiver.

12. The system of claim 11, wherein the low latency is less than five milliseconds.

13. The system of claim 1, wherein a musical instrument is coupled to the transmitter and a computer is coupled to the receiver.

14. The system of claim 1, wherein a music generator is coupled to the transmitter and a play-back device is coupled to the receiver.

15. The system of claim 1, wherein a microphone is coupled to the transmitter and a play-back device is coupled to the receiver.

16. The system of claim 15, wherein the microphone contains the transmitter.

17. The system of claim 15, wherein the play-back device contains the receiver.

18. The system of claim 1, wherein at least one of the first or second digital data streams includes at least one of error detection or correction codes.

19. The system of claim 1, wherein at least one of the first or second digital data streams includes control data.

20. A method for the wireless transmission of a digital audio signal comprising:

generating a first digital data stream and a second digital data stream from a digital audio signal;

transmitting the first digital data stream at a first radio frequency and the second digital data stream at a second radio frequency; and

receiving the first and second digital data streams at the first and second radio frequencies, respectively; and

generating the digital audio signal from the first and second digital data streams.

21. The method of claim 20, wherein the first and second digital streams generated for transmission at the first and second radio frequencies are redundant data.

22. The method of claim 20, wherein the first and second digital streams generated for transmission at the first and second radio frequencies are interleaved data.

23. The method of claim 22, wherein the interleaved data includes data samples that are alternated at the first and second radio frequencies such that if an interference occurs at one of the first or second radio frequencies, the digital audio signal is re-constructed by interpolating between the data samples on the one of the first or second radio frequencies that is not subject to interference.

24. The method of claim 20, wherein the digital audio signal is received from a musical instrument and the generated digital audio signal is played by a play-back device.

25. The method of claim 24, wherein the musical instrument is a digital musical instrument.

26. The method of claim 24, wherein the musical instrument is an analog musical instrument and generates an analog audio signal and the analog audio signal is converted into the digital audio signal.

27. The method of claim 24, wherein the musical instrument is played and the first and second digital data stream are generated and transmitted during a live performance.

28. The method of claim 27, wherein sizes of the first and second digital data stream and frequencies of the first and radio frequency are selected to ensure a low latency generation of the digital audio signal.

29. The method of claim 28, wherein the low latency is less than five milliseconds.

30. The method of claim 20, wherein the digital audio signal is received from a musical instrument and the generated digital audio signal is coupled to a computer.

31. The method of claim 20, wherein the digital audio signal is received from a musical generator and the generated digital audio signal is played by a play-back device.

32. The method of claim 20, wherein the digital audio signal is received from a microphone and the generated digital audio signal is played by a play-back device.

33. The method of claim 20, wherein at least one of the first or second digital data streams includes at least one of error detection or correction codes.

34. The method of claim 20, wherein at least one of the first or second digital data streams includes control data.

35. A system for the wireless transmission of a digital audio signal comprising:

a musical instrument;

a transmitter coupled to the musical instrument, the transmitter including a processor to;

generate a first digital data stream and a second digital data stream from a digital audio signal from the musical instrument; and

transmit the first digital data stream at a first radio frequency and the second digital data stream at a second radio frequency; and

a receiver including a processor to;

receive the first and second digital data streams at the first and second radio frequencies, respectively; and

generate the digital audio signal from the first and second digital data streams; and

a play-back device coupled to the receiver to play the generated digital audio signal;

wherein the musical instrument is connected to the receiver via the transmitter and wherein sizes of the first and second digital data stream and frequencies of the first and radio frequency are selected to ensure a low latency generation of the digital audio signal at the receiver and play-back of the generated audio signal through the play-back device.

36. The system of claim 35, wherein the first and second digital streams generated by the transmitter for transmission at the first and second radio frequencies are redundant data.

37. The system of claim 35, wherein the first and second digital streams generated by the transmitter for transmission at the first and second radio frequencies are interleaved data

38. The system of claim 37, wherein the interleaved data includes data samples that are alternated at the first and second radio frequencies such that if an interference occurs at one of the first or second radio frequencies, the digital audio signal at the receiver is re-constructed by interpolating between the data samples on the one of the first or second radio frequencies that is not subject to interference.

39. The system of claim 35, wherein the musical instrument is a digital musical instrument and generates the digital audio signal.

40. The system of claim 35, wherein the musical instrument is an analog musical instrument and generates an analog audio signal, and the transmitter further comprises an analog to digital converter to convert the analog audio signal into the digital audio signal.

41. The system of claim 35, wherein the low latency is less than five milliseconds.

42. The system of claim 35, wherein the musical instrument contains the transmitter.

43. The system of claim 35, wherein the play-back device contains the receiver.

44. The system of claim 35, wherein the musical instrument is a microphone.

45. The system of claim 44, wherein the microphone contains the transmitter.

46. The system of claim 45, wherein the play-back device contains the receiver.

47. The system of claim 35, wherein at least one of the first or second digital data streams includes at least one of error detection or correction codes.

48. The system of claim 35, wherein at least one of the first or second digital data streams includes control data.