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1. (WO2015171452) SCHÉMA D'INTÉGRATION D'UN SIGNAL DE COMMANDE DANS UN SIGNAL AUDIO À L'AIDE D'UN PSEUDO-BRUIT BLANC
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CLAIMS

What is claimed is:

1. A method, comprising:

generating an audio signal;

generating a control signal that is configured to control a haptic feedback device that is incorporated into a device for delivering audio based on the audio signal to a user; and

embedding the control signal in the audio signal by using a pseudorandom signal to form an encoded audio signal.

2. The method of claim 1, wherein the embedding the control signal in the audio signal by using a pseudorandom signal to form, an encoded audio signal comprises:

generating the encoded audio signal to be equal to a signal that is at least partly based on the audio signal plus a product of the control signal and an inverse of the pseudorandom signal.

3. The method of claim 2, wherein the signal that is at least partly based on the audio signal is equal to the audio signal.

4. The method of any one of claims 1 -3, wherein the pseudorandom signal comprises values comprising pseudorandom invertible operators.

5. The method of claim 4, wherein:

each of the pseudorandom invertible operators comprises a one element matrix; and

the pseudorandom invertible operators comprise only two states of positive one and negative one.

6. The method of claim 2 or 3, wherein the generating the encoded audio signal to be equal to a signal that is at least partly based on the audio signal plus a product of the control signal and an inverse of the pseudorandom signal comprises: multiplying the audio signal by the pseudorandom signal to form a first resultant signal;

adding the control signal to the first resultant signal to form a second resultant signal; and

multiplying the second resultant signal by the inverse of the pseudorandom signal to form the encoded aud o signal.

7. The method of claim 2, wherein the generating the encoded audio signal to be equal to a signal that is at least partly based on the audio signal plus a product of the control signal and an inverse of the pseudorandom signal comprises:

multiplying the audio signal by the pseudorandom signal to form a first resultant signal;

filtering the first resultant signal to form a filtered first resultant signal;

adding the control signal to the filtered first resultant signal to form a second resultant signal; and

multiplying the second resultant signal by the inverse of the pseudorandom signal to form the encoded audio signal.

8. The method of claim 2 or 3, wherein the generating the encoded audio signal to be equal to a signal that is at least partly based on the audio signal plus a product of the control signal and an inverse of the pseudorandom signal comprises: multiplying the control signal by the inverse of the pseudorandom signal to form a first resultant signal; and

adding the audio signal to the first resultant signal to form the encoded audio signal.

9. A non-transitory computer readable storage medium storing one or more computer programs configured to cause a processor based system to execute steps comprising:

generating an audio signal;

generating a control signal that is configured to control a haptic feedback device that is incorporated into a device for delivering audio based on the audio signal to a user; and

embedding the control signal in the audio signal by using a pseudorandom signal to form an encoded audio signal.

10. The non-transitory computer readable storage medium of claim 9, wherein the embedding the control signal in the audio signal by using a pseudorandom signal to form an encoded audio signal comprises:

generating the encoded audio signal to be equal to a signal that is at least partly based on the audio signal plus a product of the control signal and an inverse of the pseudorandom signal.

1 1. The non-transitory computer readable storage medium of claim 9 or 10, wherein the pseudorandom signal comprises values comprising pseudorandom invertibJe operators.

12. A system, comprising:

an audio output interface;

a central processing unit (CPU) coupled to the audio output interface; and a memory coupled to the CPU and storing program code that is configured to cause the CPU to execute steps comprising,

generating an audio signal;

generating a control signal that is configured to control a haptic feedback device that is incorporated info a device for delivering audio based on the audio signal to a user;

embedding the control signal in the audio signal by using a pseudorandom signal to form an encoded audio signal; and

providing the encoded audio signal to the audio output interface.

13. The system of claim 12, wherein the embedding the control signal in the audio signal by using a pseudorandom signal to form an encoded audio signal comprises:

generating the encoded audio signal to be equal to a signal that is at least partly based on the audio signal plus a product of the control signal and an inverse of the pseudorandom signal.

14. The system of claim 12 or 13, wherein the pseudorandom signal comprises values comprising pseudorandom invertible operators.

15. A method, comprising:

receiving a signal that comprises an audio signal having an embedded control signal;

recovering ihe control signal from the received signal by using a

pseudorandom signal;

using the recovered control signal to control a haptic feedback device that is incorporated into a device for delivering audio;

recovering the audio signal from the received signal; and

using the recovered audio signal to generate audio in the device for delivering audio.

16. The method of claim 15, wherein the recovering the control signal from the received signal by using a pseudorandom signal comprises:

multiplying the received signal by the pseudorandom signal to form a first resultant signal.

17. The method of claim 16, wherein the recovering the control signal from ihe received signal by using a pseudorandom signal further comprises:

recovering the control signal from the first resultant signal by filtering the first resultant signal,

18. The method of claim 17, wherein the recovering the control signal from the first resultant signal by filtering the first resultant signal comprises:

filtering the first resultant signal to isolate a narrow frequency band used by the control signal.

19. The method of any one of claims 16-18, wherein the first resultant signal comprises a peak in a narrow frequency band rising above a substantially fiat

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frequency response.

20. The method of any one of claims 16-18, wherein the recovering the control signal from the received signal by using a pseudorandom signal further comprises: comparing the first resultant signal to a threshold.

21 . The method of any one of claims 15-18, wherein the pseudorandom signal comprises values comprising pseudorandom invertible operators.

22. The method of cl aim 21, wherein:

each of the pseudorandom invertible operators comprises a one element matrix; and

the pseudorandom invertible operators comprise only two states of positive one and negative one.

23. The method of any one of claims 15- 18, further comprising:

synchronizing the pseudorandom signal with a signal that is identical to the pseudorandom signal,

24. The method of any one of claims 15- 18, wherein the recovering the audio signal from the received signal comprises:

multiplying the received signal by the pseudorandom signal to form a first resultant signal; and

recovering the audio signal from a signal that is at least partly based on the first resultant signal by multiplymg the signal that is at feast partly based on the first resultant signal by an inverse of the pseudorandom signal

25. The method of claim 24, wherein the pseudorandom signal comprises values comprising pseudorandom invertible operators.

26. The method of claim 24, wherein the signal that is at least partly based on the first resultant signal comprises the first resultant signal.

27. The method of claim 24, wherein the signal that is at least partly based on the first resultant signal comprises a filtered version of the first resultant signal.

28. A non-transitory computer readable storage medium storing one or more computer programs configured to cause a processor based system to execute steps comprising:

receiving a signal that comprises an audio signal having an embedded control signal;

reco vering the control signal from the received signal by using a

pseudorandom signal;

using the recovered control signal to control a haptic feedback device that is incorporated into a device for delivering audio;

recovering the audio signal from the received signal; and

using the recovered audio signal to generate audio in the device for delivering audio.

29. The non-transitory computer readable storage medium of claim 28, wherein the recovering the control signal from the received signal by using a pseudorandom signal comprises:

multiplying the received signal by the pseudorandom signal to form a first resultant signal.

30. The non-transitory computer readable storage medium of claim 29, wherein the recovering the control signal from the received signal by using a pseudorandom signal further comprises:

recovering the control signal from the first resultant signal by filtering the first resultant signal.

31 . The non-transitory computer readable storage medium of any one of claims 28-30, wherein the pseudorandom signal comprises values comprising pseudorandom invertibie operators.

32. The non-transitory computer readable storage medium of any one of

claims 28-30, wherein the recovering the audio signal from the received signal comprises:

multiplying the received signal by the pseudorando signal to form a first resultant signal; and

recovering the audio signal from a signal that is at least partly based on the first resultant signal by multiplying the signal ihai is at least partly based on the first resultant signal by an inverse of the pseudorandom signal,

33, A system, comprising:

at least one sound reproducing device;

at least one haptic feedback device;

a central processing unit (CPU) coupled to the at least one sound reproducing de vice and the at least one haptic feedback de v ice; and

a memory coupled to the CPU and storing progra code that is configured to cause the CPU to execute steps comprising,

receiving a signal ihai comprises an audio signal having an embedded control signal;

recovering the control signal from the received signal by using a pseudorandom signal;

using the reco vered control signal to control the at least one haptic feedback device;

recovering the audio signal from the received signal; and using the recovered audio signal to generate audio in the at least one sound reproducing device,

34, The system of claim 33, wherein the recovering the control signal from the received signal by using a pseudorandom signal comprises:

multiplying the received signal by the pseudorandom signal to for a first resultant signal.

35, The system of claim 34, wherein the recovering the control signal from the received signal by using a pseudorandom signal further comprises:

recovering the control signal from the first resultant signal by filtering the first resultant signal.

36, The system of any one of claims 33-35, wherein the pseudorandom signal comprises values comprising pseudorandom invertihle operators.

37. The system of any one of claims 33-35, wherein the recovering the audio signal from the received signal comprises:

multiplying the received signal by the pseudorandom signal to form a first resultant signal; and

recovering the audio signal from a signal that is at least partly based on the first resultant signal by multiplymg the signal that is at feast partly based on the first resultant signal by an inverse of the pseudorandom signal.