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Mobile phone construction and method for enhancing voice call quality of mobile phone

A technology of voice call quality and mobile phone structure, applied in the direction of phone structure, voice analysis, instruments, etc., to achieve the effect of filtering noise and improving the quality of voice calls

Inactive Publication Date: 2009-07-22
SHANGHAI CHENXING ELECTRONICS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that when using a mobile phone in a noisy environment, it can effectively filter noise, echo and various background noises at non-transmitting angles.

Method used

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  • Mobile phone construction and method for enhancing voice call quality of mobile phone
  • Mobile phone construction and method for enhancing voice call quality of mobile phone
  • Mobile phone construction and method for enhancing voice call quality of mobile phone

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Embodiment Construction

[0015] like figure 1 As shown, it is a system structure diagram of dual MIC (for convenience of description, the microphone is referred to as MIC) plus DSP to improve the quality of voice communication in the present invention. The DSP receives the signal of the dual MIC array, and through the digital processing of the DSP, the voice signal Line_out is sent to the audio input circuit of the mobile phone, and the audio output signals REC_Linein and SPK_Linein of the mobile phone are fed back into the DSP.

[0016] What described DSP adopts is FM2010, and the analog part main interface of FM2010 and baseband processor has 4: the reference signal (REC_Linein) of RECEIVER echo cancellation, the reference signal (SPK_Linein) of hands-free loudspeaker echo cancellation, array microphone power supply and control (MIC PWR), the output signal (Line_out) after the array microphone signal is processed by FM2010.

[0017] There are 6 main interfaces between FM2010 and the digital part of...

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Abstract

Technical problems to be solved in the invention are that mobile phone is used in a noise environment, which may effectively filter noise, echo and other background noises of non-conversation angle. A method to improve voice call quality of mobile phone is that after the mobile phone is connected, a DSP samples and compares two paths of microphone signals input; the DSP discovers that amplitude difference of the two paths of microphone signals is appropriate and identifies the signals as valid signals and processes the signals relatively; when voice from non-conversation angle is delivered to the microphone, via pickup of the microphone, the DSP discovers that amplitude difference of the two paths of microphone signals exceeds a certain value and views the signal as non-conversation noise and filters the signal. Active effect of the invention lies in that the DSP realizes small angel pickup effect via digital process of two paths of monodirectional and omnidirectional microphones, which filters noise of non-conversation angle and improves voice call quality of mobile phone.

Description

technical field [0001] The invention relates to a method for improving the quality of mobile phone voice calls, in particular to a structure of a mobile phone that uses dual microphones plus a digital signal processor to pick up sound at a small angle, and a method for improving the quality of mobile phone calls in a noisy environment. Background technique [0002] With the rapid development of mobile communications, mobile phones have become an important tool for people to communicate. However, some problems encountered in actual use have been bothering mobile phone designers. Imagine using a mobile phone to communicate on the following occasions: crowded streets, stations, docks, supermarkets; trains and subways that make huge noise; karaoke halls, bars and other places with a lot of people. There is the voice of the speaker, and various background noises are also included. This affects the comfort of the receiver. In many cases, the background noise even completely cove...

Claims

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Application Information

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IPC IPC(8): H04M1/19H04M1/20G10L21/02
Inventor 蔡春富
Owner SHANGHAI CHENXING ELECTRONICS SCI & TECH CO LTD
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