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Wireless telephone having multiple microphones

a wireless telephone and microphone technology, applied in the field of wireless telephones, can solve the problems of difficult differentiation of voice components from background noise components, inability to detect background noise, and inherent problems of background noise, so as to achieve better noise suppression and/or vad functionality

Inactive Publication Date: 2006-06-22
AVAGO TECH WIRELESS IP SINGAPORE PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] The present invention is directed to a wireless telephone having a first microphone and a second microphone, wherein an audio signal output from the second microphone is used to differentiate between a voice component and a background noise component of an audio signal output from the first microphone. Based on this differentiation, a wireless telephone in accordance with an embodiment of the present invention operates to cancel the background noise component of the audio signal output from the first microphone. Additionally or alternatively, based on this differentiation, a wireless telephone in accordance with an embodiment of the present invention provides better noise suppression and / or VAD functionality.

Problems solved by technology

Background noise is an inherent problem in wireless telephone communication.
However, the audio signal output by this microphone typically includes both a voice component and a background noise component.
As a result, the far-end user often has difficulty deciphering the desired voice component against the din of the embedded background noise component.
However, in practice, differentiating the voice component from the background noise component is difficult.

Method used

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  • Wireless telephone having multiple microphones

Examples

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Embodiment Construction

[0037] The present invention provides a wireless telephone implemented with a first microphone and a second microphone. As will be described in more detail herein, an audio signal output by the second microphone is used to improve the quality of an audio signal output by the first microphone and / or to improve noise suppression and / or VAD technology incorporated within the wireless telephone.

[0038] The detailed description of the invention is divided into six subsections. In the first subsection, an overview of the workings of a conventional wireless telephone are discussed. This discussion facilitates the description of the present invention. In the second subsection, an overview of a wireless telephone implemented with a first microphone and second microphone is presented. In the third subsection, a first embodiment of the present invention is described in which the output of the second microphone is used to cancel a background noise component output by the first microphone. In th...

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Abstract

The present invention is directed to a wireless telephone having a first microphone and a second microphone and a method for processing audio signal in a wireless telephone having a first microphone and a second microphone. The wireless telephone includes a first microphone, a second microphone, and a signal processor. The first microphone outputs a first audio signal, the first audio signal comprising a voice component and a background noise component. The second microphone outputs a second audio signal. The signal processor increases a ratio of the voice component to the noise component of the first audio signal based on the content of at least one of the first audio signal and the second audio signal to produce a third audio signal.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates generally to mobile telecommunication devices, and in particular to wireless telephones. [0003] 2. Background Art [0004] Background noise is an inherent problem in wireless telephone communication. Conventional wireless telephones include a single microphone that receives a near-end user's voice and outputs a corresponding audio signal for subsequent encoding and transmission to the telephone of a far-end user. However, the audio signal output by this microphone typically includes both a voice component and a background noise component. As a result, the far-end user often has difficulty deciphering the desired voice component against the din of the embedded background noise component. [0005] Conventional wireless telephones often include a noise suppressor to reduce the detrimental effects of background noise. A noise suppressor attempts to reduce the level of the background noise by pr...

Claims

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Application Information

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IPC IPC(8): H04R3/00H04B15/00
CPCG10L21/0208H04M1/6008H03G3/32G10L2021/02165
Inventor CHEN, JUIN-HWEYBENNETT, JAMES
Owner AVAGO TECH WIRELESS IP SINGAPORE PTE
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