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Sound signal collecting and processing system and method thereof

A sound signal, collection and processing technology, applied in the fields of sound signal collection and processing devices and sound signal collection devices, can solve problems such as inability to eliminate noise, and achieve the effect of eliminating the influence of noise and improving quality

Inactive Publication Date: 2008-03-12
LENOVO MOBILE COMM TECH
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  • Description
  • Claims
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Problems solved by technology

[0018] However, the above-mentioned adaptive beamforming algorithm based on frequency-domain LMS (Least Mean Square, Least Mean Square) cannot eliminate the noise in the beam

Method used

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  • Sound signal collecting and processing system and method thereof
  • Sound signal collecting and processing system and method thereof
  • Sound signal collecting and processing system and method thereof

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Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0056] Sound signal acquisition and processing system of the present invention as shown in Figure 2, comprises:

[0057] Sound signal collection module 21, is used for collecting sound signal, comprises a plurality of sound sensing elements, and the distance between its pickup surface and the sound source that needs to collect is different, makes the sound signal that sound source sends on different sound sensing elements different sound pressure;

[0058] The sound signal preprocessing module 22 is connected with the number of sound signal acquisition modules, and is used to convert the sound signals collected by each sound sensing element into digital voice signals respectively; Perform conversion processing and output to the beamforming module 23 respectively;

[0059] The beamforming module 23 is used for obtaining the beam according to the multi-channel digita...

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Abstract

The invention discloses a system and method for sound signal acquisition and processing, which comprises a sound signal acquisition module, a sound signal pretreatment module, a beam forming module, a D / A conversion module and a noise elimination module and is used for acquiring the frequency of the beam outputted by beam forming module which is the same as that of the first spectrum component, and then send it to the D / A conversion module. The sound pressure difference of the said first spectrum component on the pick-up surface of the sound sensing element is at the predetermined value range. The said sound signal acquisition module includes a plurality of sound sensing elements whose pick-up surfaces vary with the sound source need to collect in distance. By making the sound sensing elements coaxial and co-rotated and setting a certain interval distance, the invention filters out the spectrum components whose sound pressure difference is not in the predetermined value range to eliminate the effect caused by noise inside and outside the beam and improve the quality for signal processing.

Description

technical field [0001] The invention relates to the processing of sound signals, in particular to a sound signal collecting device capable of eliminating background noise, a sound signal collecting and processing device and method. Background technique [0002] At present, mobile phones, PDAs, telephones, earphones with sound signal collection devices, etc. all need to use the sound signal collection device, and use the sound signal collection device to collect the voice signal to be sent and then send it to the other party. [0003] However, when the user is in a noisy environment and the background noise is high in decibels, the signal collected by the sound signal collection device will include background noise, and it will be difficult to hear the original voice clearly when the collected signal is decoded and output. [0004] From the data analysis, it can be known that the user's voice can be clearly heard from the restored voice only when the voice output by the user ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0208
Inventor 胡俭波
Owner LENOVO MOBILE COMM TECH
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