Recording system and method based on multi-microphone array beam forming

A beamforming, multi-microphone technology, applied in speech analysis, frequency/direction characteristic devices, instruments, etc., can solve problems such as user inconvenience and achieve better recording effect

Active Publication Date: 2014-06-18
HUIZHOU TCL MOBILE COMM CO LTD
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  • Abstract
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Problems solved by technology

And only record the sound from a certain angle, which brings inconvenience to the user

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  • Recording system and method based on multi-microphone array beam forming
  • Recording system and method based on multi-microphone array beam forming
  • Recording system and method based on multi-microphone array beam forming

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Embodiment Construction

[0040] The invention provides a recording system based on multi-microphone array beamforming and an implementation method thereof. In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0041] First, let’s introduce the multi-microphone array beamforming technology (also known as Beam forming technology). The basic principle is as follows: individually adjust the phase and amplitude of the signal received by each unit in the multi-microphone array, so that the maximum signal-to-noise ratio in a certain direction can be obtained on the joint output, similar to the way of band-pass filtering, in the frequency domain extract the desired signal. But with beamforming for microphone arrays, the work happens in the spatial domain and is usually configurable in all directions. Due to the Fourier changes ...

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Abstract

The invention discloses a recording system and method based on multi-microphone array beam forming. The recording system based on multi-microphone array beam forming comprises multiple microphones used for collecting external voice signals, an analog-digital conversion device, a voice frequency digital signal processing device and an output device in a sequential connection mode. The recording direction can be changed in real time, only voice at a certain angle can be recorded, and the mode that other human voice and background noise excepting the voice at the certain angle are effectively eliminated is set. Meanwhile, it is unnecessary to change the position and the direction of a mobile terminal to deliberately get the mobile terminal close to the needed voice, so that the good effect of recording within 5 meters at the maximum is achieved.

Description

technical field [0001] The present invention relates to the technical field of mobile terminal recording, in particular to a recording system based on multi-microphone array beamforming and an implementation method thereof. Background technique [0002] With the rapid popularization of mobile terminals, users have higher and higher requirements for equipment functions and intelligence. How to make mobile terminals more intelligent, professional, diversified, and more efficient in daily life has become an important issue. One of the current research directions. [0003] For example: basically all mobile terminals are equipped with a recording function as standard. However, the recording function on the existing mobile terminal has shortcomings such as unguaranteed quality and monotonous functions, which makes this function completely useless compared to other dedicated recording devices. [0004] In view of the higher electrical performance and higher audio performance of M...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/20G10L21/02
Inventor 陈琼
Owner HUIZHOU TCL MOBILE COMM CO LTD
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