Granted Patent B2

US 12,308,011 · App. 18/653,795 · Granted May 20, 2025

Inventors: Remi Samuel Audfray (San Francisco, CA); Jean-Marc Jot (Aptos, CA); Samuel Charles Dicker (San Francisco, CA)

Assignee: Magic Leap, Inc.

G10K15/08

Abstract

Claims (52)

1. A method comprising:

receiving an input signal;

applying a reverb gain (RG) value to the input signal;

applying a reverb energy (RE) correction factor to the input signal;

applying a reverb initial power (RIP) correction factor to the input signal;

determining an audio signal based on the application of the RG value, the RE correction factor, and the RIP correction factor to the input signal; and

presenting the audio signal to via one or more speakers of a wearable head device.

2. The method of claim 1 , further comprising:

determining the RIP correction factor, wherein the RIP correction factor is determined and applied to the input signal by a RIP corrector,

wherein the RIP correction factor is determined such that a signal output from the RIP corrector is normalized.

3. The method of claim 1 , wherein the RIP correction factor is based on one or more of: a reverberator topology, a number of delay units, a delay duration, a connection gain, and a filter parameter.

4. The method of claim 1 , wherein the RIP correction factor is based on a power of a reverberation impulse response.

5. The method of claim 1 , wherein the applying the RIP correction factor comprises selecting a reverberator topology and setting internal reverberator parameters.

6. The method of claim 1 , wherein the RE correction factor is based on a decay time, a reverb energy, and further based on the RIP correction factor such that a RIP corrected signal is normalized.

7. The method of claim 1 , further comprising determining the RIP correction factor, wherein:

the determining the RIP correction factor comprises:

determining a reverberator impulse response, and

determining a reverberation RMS amplitude, and

the RIP correction factor is inversely related to the reverberation RMS amplitude.

8. The method of claim 7 , wherein the determining the RIP correction factor further comprises determining a reverberation RMS amplitude decay.

9. The method of claim 1 , further comprising:

determining the RE correction factor, wherein the RE correction factor is applied to the input signal by a RE corrector,

wherein the RE correction factor is determined such that a signal output from the RE corrector is normalized.

10. The method of claim 1 , further comprising applying a reverberation effect to the input signal, wherein the audio signal is further based on the application of the reverberation effect.

11. The method of claim 10 , wherein the applying the reverberation effect comprises filtering one or more frequencies of the input signal.

12. The method of claim 10 , wherein the applying the reverberation effect comprises changing a phase of the input signal.

13. The method of claim 10 , wherein the reverberation effect is applied after the RIP correction factor is applied.

14. The method of claim 1 , wherein one or more of the RG value, RE correction factor, and RIP correction factor are determined via one or more sensors of the wearable head device.

15. A system comprising:

a wearable head device comprising one or more speakers, the wearable head device configured to present an audio signal to a user; and

one or more processors configured to perform a method comprising:

receiving an input signal;

applying a reverb gain (RG) value to the input signal;

applying a reverb energy (RE) correction factor to the input signal;

applying a reverb initial power (RIP) correction factor to the input signal;

determining the audio signal based on the application of the RG value, the RE correction factor, and the RIP correction factor to the input signal; and

presenting the audio signal to via the one or more speakers.

16. The system of claim 15 , wherein the method further comprises:

determining the RIP correction factor, wherein the RIP correction factor is determined and applied to the input signal by a RIP corrector,

wherein the RIP correction factor is determined such that a signal output from the RIP corrector is normalized.

17. The system of claim 15 , wherein the method further comprises applying a reverberation effect to the input signal, wherein the audio signal is further based on the application of the reverberation effect.

18. The system of claim 15 , wherein:

the wearable head device comprises one or more sensors, and

one or more of the RG value, RE correction factor, and RIP correction factor are determined via the one or more sensors.

19. A non-transitory computer-readable medium storing instructions which, when executed by one or more processors, cause the one or more processors to perform a method comprising:

receiving an input signal;

applying a reverb gain (RG) value to the input signal;

applying a reverb energy (RE) correction factor to the input signal;

applying a reverb initial power (RIP) correction factor to the input signal;

determining an audio signal based on the application of the RG value, the RE correction factor, and the RIP correction factor to the input signal; and

presenting the audio signal to via one or more speakers of a wearable head device.

20. The non-transitory computer-readable medium of claim 19 , wherein one or more of the RG value, RE correction factor, and RIP correction factor are determined via one or more sensors of the wearable head device.

Assignments (3)

Continuity (6)

References Cited (150)