TELEPHONE OR OTHER DEVICE WITH SPEAKER-BASED OR LOCATION-BASED SOUND FIELD PROCESSING

• US 20120150542A1
• Filed: 12/09/2010
• Published: 06/14/2012
• Est. Priority Date: 12/09/2010
• Status: Abandoned Application

• Current Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Original Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Inventors: Ma, Wei
• Application Number:
  US12/963,875
• Publication Number:
  US 20120150542A1
• Time in Patent Office: Days
• US Class Current: 704/258
• CPC Class Codes: G10L 2021/02166 Microphone arrays; Beamforming
• CPC Class Codes: H04S 2420/01 Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
• CPC Class Codes: H04S 3/008 in which the audio signals are in digital form, i.e. employing more than two discrete digital channels data reduction aspects thereof based on psychoacoustics G10L19/02

Abstract

A method includes obtaining audio data representing audio content from at least one speaker. The method also includes spatially processing the audio data to create at least one sound field, where each sound field has a spatial characteristic that is unique to a specific speaker. The method further includes generating the at least one sound field using the processed audio data. The audio data could represent audio content from multiple speakers, and generating the at least one sound field could include generating multiple sound fields around a listener. The spatially processing could include performing beam forming to create multiple directional beams, and generating the multiple sound fields around the listener could include generating the directional beams with different apparent origins around the listener. The method could further include separating the audio data based on speaker, where each sound field is associated with the audio data from one of the speakers.

Claims

1. A method comprising:

obtaining audio data representing audio content from at least one speaker;

spatially processing the audio data to create at least one sound field, wherein each sound field has a spatial characteristic that is unique to a specific speaker; and

generating the at least one sound field using the processed audio data.

2. The method of claim 1, wherein:

the audio data represents audio content from multiple speakers; and

generating the at least one sound field comprises generating multiple sound fields around a listener.

3. The method of claim 2, wherein:

spatially processing the audio data comprises performing beam forming to create multiple directional beams; and

generating the multiple sound fields around the listener comprises generating the directional beams with different apparent origins around the listener.

4. The method of claim 2, further comprising:

separating the audio data based on speaker;

wherein each sound field is associated with the audio data from one of the speakers.

5. The method of claim 4, wherein:

obtaining the audio data comprises receiving packets of audio data over a network; and

separating the audio data comprises separating the packets based on origination addresses in the packets.

6. The method of claim 1, wherein obtaining the audio data comprises receiving the audio data over a network, the audio data associated with one or more remote participants in a telephone call.

7. The method of claim 1, wherein:

the audio data represents audio content from a single speaker; and

generating the at least one sound field comprises generating a single sound field around a listener, the single sound field having an apparent destination that varies based on at least one of;

an identity of the single speaker, a phone number of the single speaker, and a category associated with the single speaker.

8. The method of claim 1, wherein generating the at least one sound field comprises using at least one of:

a speaker array and an output interface to a set of headphones.

9. An apparatus comprising:

an interface configured to obtain audio data representing audio content from at least one speaker; and

a processing unit configured to spatially process the audio data to create at least one sound field, wherein each sound field has a spatial characteristic that is unique to a specific speaker.

10. The apparatus of claim 9, wherein:

the interface is configured to obtain audio data representing audio content from multiple speakers; and

the processing unit is configured to create multiple sound fields around a listener.

11. The apparatus of claim 10, wherein the processing unit is configured to perform beam forming to create multiple directional beams with different apparent origins around the listener.

12. The apparatus of claim 10, wherein the processing unit comprises:

one or more array filters configured to filter the audio data, each array filter having one or more filter coefficients selected to provide a desired beam pattern; and

one or more amplifiers configured to amplify the filtered audio data.

13. The apparatus of claim 10, further comprising:

a controller configured to separate the audio data based on speaker;

wherein the processing unit is configured to create the sound fields such that each sound field is associated with the audio data from one of the speakers.

14. The apparatus of claim 10, further comprising:

a microphone array configured to capture second audio data; and

a controller configured to perform echo and noise cancellation using the second audio data.

15. The apparatus of claim 9, wherein the interface and the processing unit form a part of one of:

a desktop telephone and a video projector.

16. A system comprising:

a spatial processing apparatus comprising;

a first interface configured to obtain audio data representing audio content from at least one speaker; and

a processing unit configured to spatially process the audio data to create at least one sound field, wherein each sound field has a spatial characteristic that is unique to a specific speaker; and

at least one of;

a speaker array configured to generate the at least one sound field using the processed audio data for a listener; and

a second interface configured to output the processed audio data for presentation to the listener.

17. The system of claim 16, wherein:

the first interface is configured to obtain audio data representing audio content from multiple speakers; and

the processing unit is configured to create multiple sound fields.

18. The system of claim 17, wherein the processing unit is configured to perform beam forming to create multiple directional beams with different apparent origins around the listener.

19. The system of claim 17, wherein the spatial processing apparatus further comprises:

a controller configured to separate the audio data based on speaker;

wherein the processing unit is configured to create the sound fields such that each sound field is associated with the audio data from one of the speakers.

20. The system of claim 17, wherein the spatial processing apparatus further comprises:

a microphone array configured to capture second audio data; and

a controller configured to perform echo and noise cancellation using the second audio data.