Feedback cancelation for enhanced conversational communications in shared acoustic space

An acoustic space, non-traffic technology, applied in the spatial/structural arrangement of speakers, telephone communication, transducer acoustic response prevention, etc.

Inactive Publication Date: 2017-08-01
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Conversation between two people may be difficult in a shared acoustic space where other people are speaking, other sources of noise (speech and non-speech), and/or other physical limitati

Method used

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  • Feedback cancelation for enhanced conversational communications in shared acoustic space
  • Feedback cancelation for enhanced conversational communications in shared acoustic space
  • Feedback cancelation for enhanced conversational communications in shared acoustic space

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Embodiment approach

[0066] In addition to the foregoing, certain implementations disclosed herein may utilize active or passive configuration determination techniques and / or active or passive identification determination techniques. Active or passive configuration determination and / or active or passive identification determination techniques (as applied to various embodiments disclosed in this application) are summarized as follows:

[0067] With regard to active or passive configuration determination, this paper discloses (and for convenience, in figure 1 with 2 Various implementations, discussed in the context of the car 102 of ), may be configured to use any of several techniques for determining the current configuration of passengers in the shared acoustic space. For example, for some implementations, the MAS may determine the current configuration of passengers by monitoring sounds from specific seat positions of the vehicle to determine which seats are occupied and which seats are not. S...

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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.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to commonly owned U.S. Provisional Patent Application No. 62 / 091,383, filed December 12, 2014, and U.S. Nonprovisional Patent Application No. 14 / 808,746, filed July 24, 2015, above The content of the application is expressly incorporated herein by reference in its entirety. Background technique [0003] Feedback (or "acoustic positive feedback") occurs when there is a loop of sound between an audio input (such as a microphone) and an audio output (such as a loudspeaker). For example, a signal picked up by a microphone can be amplified and passed through a loudspeaker. The sound from the loudspeaker can then be received again by the microphone, further amplified, and then passed out through the loudspeaker again. The frequency of the resulting sound is determined by the resonant frequencies in the microphones, amplifiers, and loudspeakers; the acoustics of the room, the directional pick...

Claims

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Application Information

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IPC IPC(8): G10L21/02G10L21/0208G10L21/0216H04M9/08H04R3/02H04R5/02H04R27/00
CPCG10L21/02G10L21/0208G10L21/0216H04M9/082H04R3/02H04R5/02H04R27/00G10L2021/02087G10L2021/02165G10L2021/02082H04S7/302H04R2499/13H04R2227/009H04S7/00G10K11/178
Inventor 金莱轩阿西夫·伊克巴勒·穆罕默德埃里克·维瑟
Owner QUALCOMM INC
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