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Process audio frequency signal

A technology of audio signal and audio output, which is used in speaker distribution signal, speech analysis, telephone communication, etc.

Inactive Publication Date: 2013-03-20
SKYPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] While a microphone beamformer will attempt to suppress echoes from unwanted directions, the number of microphones and the shape and size of the microphone array will limit the effectiveness of the beamformer, and as a result, unwanted echo audio signals are suppressed, but still audible

Method used

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Embodiment Construction

[0030] In the following embodiments of the invention, a technique is described in which an audio signal output from a loudspeaker arrangement is magnified in the direction of the microphone by exploiting destructive interference to increase robustness against howling and highly echogenic path gain. attenuation.

[0031] first reference figure 1 , which illustrates the communication system 100 of the preferred embodiment. A first user of the communication system (user A 102 ) operates the device 104 . Device 104 may be, for example, a mobile phone, television, personal digital assistant ("PDA"), personal computer ("PC") (including, for example, Windows TM 、Mac OS TM and Linux TM PC), tablet computer, gaming device, or other embedded devices capable of communicating through the communication system 100 .

[0032] Device 104 includes a central processing unit (CPU) 108 that may be configured to execute applications, such as communication client applications for communicatin...

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Abstract

A method, equipment and a computer program product for processing audio frequency signals are provided, wherein the method comprises: determining beam former filter coefficient applied by the audio frequency signals; applying the beam former filter coefficient to the audio frequency signals; outputting filtered audio frequency signals from an audio frequency output device, and the audio frequency output device comprises a plurality of loudspeakers coupled with the equipment; and receiving filtered audio frequency signals outputted from the audio frequency output device from microphones coupled with the equipment, wherein the filter coefficient is determined to make the filtered audio frequency signals to be suppressed when being received by the microphone.

Description

technical field [0001] The invention relates to processing audio signals, eg during a communication session. Background technique [0002] Communication systems allow users to communicate with each other over a network. The network may eg be the Internet or the Public Switched Telephone Network (PSTN). Audio signals can be communicated between nodes of the network to thereby allow users to send and receive audio data (eg, voice data) to each other in a communication session over the communication system. [0003] The device may have audio output means, such as a speaker for outputting audio signals to a user. Audio signals output from the speakers may be received over the network from the user(s) during the call. The speakers may also be used to output audio signals from other audio sources. For example, the device may be a TV, in which case the speakers will also output TV audio signals. [0004] The device may also have audio input means, such as a microphone that can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/19G10L21/0208
CPCH04M9/082H04R3/12
Inventor K.V.索伦森
Owner SKYPE