DISTRIBUTED SIGNAL PROCESSING OF IMMERSIVE THREE-DIMENSIONAL SOUND FOR AUDIO CONFERENCES

• US 20110026745A1
• Filed: 07/31/2009
• Published: 02/03/2011
• Est. Priority Date: 07/31/2009
• Status: Abandoned Application

• Current Assignee: Amir Said, Ton Kalker
• Original Assignee: Amir Said, Ton Kalker
• Inventors: Kalker, Ton, Said, Amir
• Application Number:
  US12/533,260
• Publication Number:
  US 20110026745A1
• Time in Patent Office: Days
• US Class Current: 381/310
• CPC Class Codes: H04S 1/002 Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution control circuits for electronic adaptation of the sound field H04S7/30
• CPC Class Codes: H04S 1/005 For headphones
• 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]

Abstract

Embodiments of the present invention are directed to audio-conference communication systems that enable audio-conference participants to identify which of the participants are speaking. In one embodiment, an audio-communication system comprises at least one communications server, a plurality of stereo sound generating devices, and a plurality of microphones. Each stereo sound generating device is electronically coupled to the at least one communications server, and each microphone is electronically coupled to the at least one communications server. Each microphone detects different sounds that are sent to the at least one communications server as corresponding sound signals. The at least one communications server converts the sound signals into corresponding stereo signals that when combined and played over each of stereo sound generating devices creates an impression for a person listing to any one of the stereo sound generating devices that each of the sounds emanates from a different virtual location in three-dimensional space.

Claims

1. An audio-communication system comprising:

at least one communications server;

a plurality of stereo sound generating devices, each stereo sound generating device electronically coupled to the at least one communications server and

a plurality of microphones electronically coupled to the at least one communications servers, each microphone detecting different sounds that are sent to the at least one communications server as corresponding sound signals, wherein the at least one communications server converts the sound signals into corresponding stereo signals that when combined and played over each of stereo sound generating devices creates an impression for a person listing to any one of the stereo sound generating devices that each of the sounds emanates from a different virtual location in three-dimensional space.

2. The system of claim 1 wherein the stereo sound generating device further comprise one of headphones or a pair of stereo speakers.

3. The system of claim 1 wherein the at least one communications server further comprises a computing device configured to receive sound signals and route the combined stereo signal to each of the stereo sound generating devices.

4. The system of claim 1 wherein the at least one communications server converts each sound signal into a corresponding stereo signal further comprises the at least one communications server cons oh each of the sound signals with a pair of left ear and right ear head-related impulse responses, each pair of left ear and right ear head-related impulse responses corresponding to a different virtual location in three-dimensional space for the sound detected by a microphone.

5. The system of claim 1 wherein the at least one communications server converts each sound signal into a corresponding stereo signal further comprises the at least one communications server transforms each sound signal from the time domain into a frequency-domain sound signal, convolves each of the frequency-domain sound signals with a pair of left ear and right ear head-related transfer functions in the time domain or the frequency domain, each pair of head-related transfer functions corresponding to a different virtual location for a sound detected by a microphone, and transforms the frequency-domain stereo signals into the time domain.

6. The system of claim 1 wherein one or more of the stereo sound generating devices further comprises a head-orientation sensor in electronic communication with the at least one communications server.

7. The system of claim 6 wherein the head-orientation sensor sends electronic signals to the at least one communications server identifying a listener'"'"'s head orientation such that the at least one communications server adjusts the combined stereo signals sent to the stereo sound generating device to maintain the virtual positions of the corresponding sounds heard by the listener.

8. An audio-communication system comprising:

at least one communications server;

a plurality of stereo sound generating devices;

a plurality of computing devices, each computing device electronically coupled to one of the stereo sound generating devices and the at least one communications server; and

a plurality of microphones electronically coupled to the at least one communications server, each microphone detecting different sounds that are sent to the at least one communications server as corresponding sound signals, wherein the at least one communications server combines the sound signals and sends the combined sound signals to each of the computational devices, wherein each computing device converts the sound signals into corresponding stereo signals that when combined and played over each of stereo sound generating devices creates an impression for a person listing to any one of the stereo sound generating devices that each of the sounds emanates from a different virtual location in three-dimensional space.

9. The system of claim 8 wherein the stereo sound generating device further comprise one of headphones or a pair of stereo speakers.

10. The system of claim 8 wherein at least one communications server further comprises a computing device configured to receive sound signals from each of the microphones, combine the sound signals, and send the combined sound signals to each of the computing devices.

11. The system of claim 8 wherein each computing device converts each sound signal into a corresponding stereo signal further comprises the at least one communications server convolves each of the sound signals with a pair of left ear and right ear head-related impulse responses, each pair of left ear and right ear head-related impulse responses corresponding to a different virtual location for the sound detected by a microphone.

12. The system of claim 8 wherein each computing device converts each sound signal into a corresponding stereo signal further comprises the at least one communications server transforms each sound signal from the time domain into a frequency-domain sound signal, convolves each of the frequency-domain sound signals with a pair of left ear and right ear head-related transfer functions frequency-domain stereo signals, each pair of head-related transfer functions corresponding to a different virtual location for a sound detected by a microphone, and transforms the frequency-domain stereo signals into the time domain.

13. The system of claim 8 wherein one or more of the stereo sound generating devices further comprises a head-orientation sensor in electronic communication with the at least one communications server.

14. The system of claim 13 wherein the head-orientation sensor sends electronic signals to the at least one communications server identifying a listener'"'"'s head orientation such that the at least one communications server adjusts the combined stereo signals sent to the stereo sound generating device to maintain the virtual positions of the corresponding sounds heard by the listener.

15. An audio-communication system comprising:

at least one communications server;

a plurality of computing devices electronically coupled to the at least one communications server;

a plurality of stereo sound generating devices, each stereo sound generating device electronically coupled to one of the computing devices; and

a plurality of microphones, each microphone electronically coupled to one of the computing devices, wherein each microphone detects sounds that are sent to the electronically coupled computing device as sound signals, wherein each electronically coupled computing converts sound signals into corresponding stereo signals that are sent to the at least one communications server, which combines the stereo signals, such that when the combined stereo signals are played over each of the stereo sound generating devices creates an impression for a person listing to any one of the stereo sound generating devices that each of the sounds emanates from a different virtual location in three-dimensional space.

16. The system of claim 15 wherein the stereo sound generating device further comprise one of headphones or a pair of stereo speakers.

17. The system of claim 15 wherein the at least one communications server further comprises a computing device configured to receive stereo signals, combined stereo signals, and sends the combined stereo signals to each of the stereo sound generating devices.

18. The system of claim 15 wherein each computing device converts each sound signal into a corresponding stereo signal further comprises the at least one communications server convolves each of the sound signals with a pair of left car and right ear head-related impulse responses, each pair of left ear and right ear head-related impulse responses corresponding to a different virtual location for the sound detected by a microphone.

19. The system of claim 15 wherein each computing device converts each sound signal into a corresponding stereo signal further comprises the at least one communications server transforms each sound signal from the time domain into a frequency-domain sound signal, convolves each of the frequency-domain sound signals with a pair of left ear and right ear head-related transfer functions frequency-domain stereo signals, each pair of head-related transfer functions corresponding to a different virtual location for a sound detected by a microphone, and transforms the frequency-domain stereo signals into the time domain.