Invention Grant
- Patent Title: Feedback cancelation for enhanced conversational communications in shared acoustic space
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Application No.: US14808746Application Date: 2015-07-24
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Publication No.: US09672805B2Publication Date: 2017-06-06
- Inventor: Lae-Hoon Kim , Asif Iqbal Mohammad , Erik Visser
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Toler Law Group, PC
- Main IPC: G10K11/16
- IPC: G10K11/16 ; A61F11/06 ; G10K11/178 ; G10L21/02 ; H04R3/02 ; H04R5/02 ; H04S7/00 ; H04R27/00 ; H04M9/08 ; G10L21/0208

Abstract:
A crosstalk cancelation technique reduces feedback in a shared acoustic space by canceling out some or all parts of sound signals that would otherwise be produced by a loudspeaker to only be captured by a microphone that, recursively, would cause these sounds signals to be reproduced again on the loudspeaker as feedback. Crosstalk cancelation can be used in a multichannel acoustic system (MAS) comprising an arrangement of microphones, loudspeakers, and a processor to together enhance conversational speech between in a shared acoustic space. To achieve crosstalk cancelation, a processor analyzes the inputs of each microphone, compares it to the output of far loudspeaker(s) relative to each such microphone, and cancels out any portion of a sound signal received by the microphone that matches signals that were just produced by the far loudspeaker(s) and sending only the remaining sound signal (if any) to such far loudspeakers.
Public/Granted literature
- US20160171964A1 FEEDBACK CANCELATION FOR ENHANCED CONVERSATIONAL COMMUNICATIONS IN SHARED ACOUSTIC SPACE Public/Granted day:2016-06-16
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