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
View PDF0 Cites 19 Cited by
  • 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 nois

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Such as figure 1 Shown is the system structure diagram of the present invention with dual MIC (for convenience of description, the microphone is abbreviated as MIC) plus DSP to improve the voice call quality. The DSP receives the signal of the dual MIC array, and after digital processing by 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] The DSP adopts FM2010, FM2010 and the analog part of the baseband processor. There are 4 main interfaces: RECEIVER reference signal for echo cancellation (REC_Linein), reference signal for hands-free speaker echo cancellation (SPK_Linein), array microphone power supply and control (MIC PWR), the output signal (Line_out) of the array microphone signal processed by FM2010.

[0017] There are 6 main interfaces between FM2010 and the digital part of the baseband processor: clock signal (13MHz...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04M1/19H04M1/20G10L21/02
Inventor 蔡春富
Owner SHANGHAI CHENXING ELECTRONICS SCI & TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap