Simulating acoustic output at a location corresponding to source position data

Patent metadata

Field	Value
Publication number	US-9854376-B2
Application number	US-201514791758-A
Country	US
Kind code	B2
Filing date	Jul 6, 2015
Priority date	Jul 6, 2015
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

Systems and methods of simulating acoustic output at a location corresponding to source position data are disclosed. A particular method includes receiving an audio signal and source position data associated with the audio signal. A set of speaker signals are applied to a plurality of speakers, where the set of speaker driver signals causes the plurality of speakers to generate acoustic output that simulates output of the audio signal by an audio source at a location corresponding to the source position data.

First claim

What is claimed is:

1. A method comprising:
receiving an audio signal and source position data associated with the audio signal, wherein the audio signal and the source position data are received by an audio system in a vehicle, and wherein a plurality of speakers are distributed within the vehicle;
applying a set of speaker driver signals to the plurality of speakers, wherein the set of speaker driver signals causes the plurality of speakers to generate acoustic output that simulates output of the audio signal by an audio source at a location corresponding to the source position data;
up-mixing the audio signal to generate a plurality of intermediate signal components;
down-mixing the plurality of intermediate signal components to generate a plurality of speaker signal components; and
processing the plurality of speaker signals components to generate the set of speaker driver signals that cause the plurality of speakers to simulate output of the audio signal at the location corresponding to the source position data.

2. The method of claim 1 , wherein the set of speaker driver signals corresponds to one or more fixed speakers, one or more virtual speakers, or a combination thereof.

3. The method of claim 1 , wherein the location corresponding to the source position data is distinct from locations of the plurality of speakers.

4. The method of claim 1 , further comprising applying a second set of speaker driver signals to the plurality of speakers to generate acoustic output corresponding to a second location that is different from the location.

5. The method of claim 1 , wherein the audio signal, the source position data, or both are received from an automatic driver assistance system, a navigation system, or a mobile device.

6. The method of claim 1 ,
wherein the plurality of speakers comprise a plurality of near-field speakers, and a plurality of fixed speakers located forward of the near-field speakers;
wherein the set of speaker driver signals comprises a first plurality of speaker driver signals for delivery to the plurality of near-field speakers, and a second plurality of speaker driver signals for delivery to the plurality of fixed speakers located forward of the near-field speakers; and
wherein processing the plurality of speaker signal components comprises:
binaural filtering the plurality of speaker signal components to generate a plurality of binaural image signals;
combining the plurality of binaural image signals to generate the first plurality of speaker driver signals; and
combining the plurality of speaker signal components to generate the second plurality of speaker driver signals.

7. The method of claim 6 , further comprising adjusting a gain, a magnitude or a phase of at least two of the plurality of speaker signal components.

8. The method of claim 1 , wherein generating the set of speaker driver signals comprises binaural filtering.

9. The method of claim 1 , wherein each of the plurality of intermediate signal components corresponds to a respective point on a two-dimensional plane corresponding to an acoustic space.

10. The method of claim 9 , wherein the acoustic space includes a first location within a vehicle and a second location outside of a vehicle.

11. The method of claim 1 , wherein the source position data includes listener position data associated with a listener location.

12. The method of claim 1 , wherein the audio signal is a single channel audio signal.

13. The method of claim 1 , wherein the audio signal corresponds to announcements associated with at least one of an automatic driver assistance system, a navigation system, or a mobile device.

14. An apparatus comprising:
a plurality of speakers, and
an audio signal processor configured to:
receive an audio signal and source position data associated with the audio signal, wherein the source position data includes listener position data associated with a listener location;
apply a set of speaker driver signals to the plurality of speakers, wherein the set of speaker driver signals causes the plurality of speakers to generate acoustic output that simulates output of the audio signal by an audio source at a location corresponding to the source position data;
up-mix the audio signal to generate a plurality of intermediate signal components;
down-mix the plurality of intermediate signal components to generate a plurality of speaker signal components; and
process the plurality of speaker signals components to generate the set of speaker driver signals that cause the plurality of speakers to simulate output of the audio signal at the location corresponding to the source position data.

15. The apparatus of claim 14 , wherein the plurality of speakers and the audio signal processor are included in a vehicle.

16. A non-transitory machine-readable storage medium having instructions stored thereon to simulate acoustic output, which, when executed by a processor, causes the processor to:
receive an audio signal and source position data associated with the audio signal, wherein the source position data includes listener position data associated with a listener location;
apply a set of speaker driver signals to a plurality of speakers, wherein the set of speaker driver signals causes the plurality of speakers to generate acoustic output that simulates output of the audio signal by an audio source at a location corresponding to the source position data;
up-mix the audio signal to generate a plurality of intermediate signal components;
down-mix the plurality of intermediate signal components to generate a plurality of speaker signal components; and
process the plurality of speaker signals components to generate the set of speaker driver signals that cause the plurality of speakers to simulate output of the audio signal at the location corresponding to the source position data.

17. The non-transitory machine-readable storage medium of claim 16 , wherein the plurality of speakers are included in a vehicle.

18. A method comprising:
receiving an audio signal and source position data associated with the audio signal, wherein the source position data includes listener position data associated with a listener location; and
applying a set of speaker driver signals to a plurality of speakers, wherein the set of speaker driver signals causes the plurality of speakers to generate acoustic output that simulates output of the audio signal by an audio source at a location corresponding to the source position data, wherein the location corresponding to the source position data is associated with a magnitude adjusted linear sum of signals corresponding to a plurality of points in an acoustic space.

19. The method of claim 18 , further comprising applying a second set of speaker driver signals to the plurality of speakers to generate acoustic output corresponding to a second location that is different from the location.

20. The method of claim 18 , wherein generating the set of speaker driver signals comprises binaural filtering.

21. A method comprising:
receiving an audio signal and source position data associated with the audio signal;
applying a set of speaker driver signals to a plurality of speakers, wherein the set of speaker driver signals causes the plurality of speakers to generate acoustic output that simulates output of the audio signal by an audio source at a location corresponding to the source position data;
up-mixing the audio signal to generate a plurality of intermediate signal components, wher

Assignees

• Bose Corp

Inventors

• Vautin Jeffery R
• Dublin Michael S

Classifications

• H04R5/023

  in a chair, pillow · CPC title

• H04R1/323

  for loudspeakers (H04R1/34 and H04R1/40 take precedence) · CPC title

• H04S7/302 Primary

  Electronic adaptation of stereophonic sound system to listener position or orientation (H04S7/301 takes precedence) · CPC title

• H04S2400/11

  Positioning of individual sound objects, e.g. moving airplane, within a sound field (H04S2420/13 takes precedence) · CPC title

• H04R2499/13

  Acoustic transducers and sound field adaptation in vehicles · CPC title