CN103839553A - Fixed-point recording system - Google Patents

Fixed-point recording system Download PDF

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Publication number
CN103839553A
CN103839553A CN201410094600.9A CN201410094600A CN103839553A CN 103839553 A CN103839553 A CN 103839553A CN 201410094600 A CN201410094600 A CN 201410094600A CN 103839553 A CN103839553 A CN 103839553A
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CN
China
Prior art keywords
described
sound source
microphone
acoustic information
recording system
Prior art date
Application number
CN201410094600.9A
Other languages
Chinese (zh)
Inventor
王岩泽
Original Assignee
王岩泽
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 王岩泽 filed Critical 王岩泽
Priority to CN201410094600.9A priority Critical patent/CN103839553A/en
Publication of CN103839553A publication Critical patent/CN103839553A/en

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Abstract

A fixed-point recording system only interviews and records the sound of a sound source and filters out the sound made by points except for the sound source. According to the technical points, the fixed-point recording system tracks and positions the distance from the sound source to a plurality of microphones and removes noise by utilizing the position characteristics of the sound source.

Description

Fixed point recording system

Technical field

The present invention relates to the sampling and processing system of sound, particularly a kind of fixed point recording system.

Background technology

In a scene, only to the sound collection of specific position out, at present also without this equipment.

Summary of the invention

The present invention has overcome shortcoming and defect of the prior art, and a kind of fixed point recording system is provided.

Technical scheme of the present invention is: a kind of fixed point recording system, there is a sound source, and comprise that two microphones carry out acoustic information collection to described sound source,

Within a work period:

The acoustic information of described multiple microphone collections is transported to a processing unit;

There is a coordinate setting unit, described sound source and described multiple microphone are carried out to space orientation, and each coordinate information is transported to described processing unit;

Described processing unit calculates described sound source to the distance between each microphone according to described each coordinate information, and obtains thus the time value of acoustic information from described sound source to each microphone;

Described processing unit, according to the time value of each microphone, is moved to the left acoustic information on time shaft, and the acoustic information of all microphone collections is alignd on time shaft;

After alignment, the acoustic information that visible described sound source is sent, its waveform overlaps on time shaft, be not the sound that described sound source is sent, its waveform has gap on time shaft, and this belongs to noise, according to this characteristic of described noise, we remove it so long, and result is exported.

The present invention comprises three microphones.

The present invention comprises four microphones.

Accompanying drawing explanation

Fig. 1 stage schematic diagram.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the invention will be further described: so-called fixed point recording, and this fixed point is exactly the information of our the specific sound source that will gather, and object of the present invention is exactly the sound of removing outside sound source, referred to here as noise.

Be provided with now two microphones described sound source is carried out to acoustic information collection, within a work period, also be to say in a period of time, choosing according to the processing speed of system and human auditory characteristics of time period determined, and can select 0.1 second and also can select 0.01 second, and the speed of system processing must be fewer than the time of described acoustic information, reach after this requirement, the time of selecting is shorter, and the real-time of processing is stronger.

First the acoustic information of these multiple microphone collections is transported to a processing unit; But also to there is a coordinate setting unit, coordinate setting unit adopts the words of gps location, because precision does not reach requirement, a preferably self-built small-sized area positioning system, described sound source and described two microphones are carried out to real time location tracking, and coordinate information is transported to described processing unit.

Described processing unit calculates described sound source to the distance between described each microphone; That is: system not only gathers the acoustic information of each microphone, also gathers the real-time range information of this acoustic information and this microphone; Described distance calculates the time value of this microphone divided by sound velocimeter.

Described processing unit utilizes the time value of each microphone, and acoustic information is moved to the left on time shaft, and mobile size is described time value, like this, the acoustic information of all microphone collections aligns on time shaft, after alignment, and the sound that visible described sound source is sent, its waveform approaches and overlaps on time shaft, be not the sound that described sound source is sent, its waveform has gap on time shaft, belongs to noise, according to this characteristic of noise, we can be described noise removal.

In the present embodiment, we can adopt logic to screen out, and calculate the union of these two microphones collection acoustic informations, noise information is screened out like this, and remaining voice signal output, for remaining voice signal, can be that multiple voice signals are permeated.

Utilize mathematical knowledge visible, in the time that microphone is two, the noise outside not all sound source can screen out, and the noise on a hyperbolic curve take two microphones as focus can not screen out.

If by same principle, native system increases to three microphones, so in three dimensions, concerning with described sound source, the noise that the point take three microphones as the plane of symmetry sends can not screen out.

If by same principle, native system increases to four microphones, and so in theory, all noises outside described sound source all can screen out.

Enumerate a kind of support that needs specific software and hardware with this system of stage fixed point recording system below, as follows to each ingredient and the function description of system:

One, stage: as shown in Figure 1, a four jiaos of each console mode microphone a, b, c, d of settling of stage of rectangle, are equipped with position locator on each microphone holder, and these four microphones have is furnished with steady arm, also body band position locator all of appearance performer, the performer that appears on the scene is now A.

Two, positioning system: utilize positioning system of the prior art to carry out position track and localization to the performer of four microphone a, b, c, d and each appearance on stage, four microphone selection console modes, be fixed on four pin of rectangle stage, the position coordinates of these four microphones is constant so, performer walks up and down at stage, work is only carried out real-time track and localization to performer, and performer's position coordinates is to change in real time.

Three, daemon software: selecting specific point on stage is sound source, other point is just considered as noise point so, selection can be auditory localization with it the specific performer, as performer A, because performer has steady arm, can be sound source to this performer's track and localization, when needed, can follow the tracks of then another performer of tracking.

Claims (3)

1. a fixed point recording system, has a sound source, comprises that two microphones carry out acoustic information collection to described sound source, it is characterized in that,
Within a work period:
The acoustic information of described multiple microphone collections is transported to a processing unit;
There is a coordinate setting unit, described sound source and described multiple microphone are carried out to space orientation, and each coordinate information is transported to described processing unit;
Described processing unit calculates described sound source to the distance between each microphone according to described each coordinate information, and obtains thus the time value of acoustic information from described sound source to each microphone;
Described processing unit, according to the time value of each microphone, is moved to the left acoustic information on time shaft, and the acoustic information of all microphone collections is alignd on time shaft;
After alignment, the acoustic information that visible described sound source is sent, its waveform overlaps on time shaft, be not the sound that described sound source is sent, its waveform has gap on time shaft, and this belongs to noise, according to this characteristic of described noise, we remove it so long, and result is exported.
2. a kind of fixed point recording system according to claim 1, is characterized in that comprising three microphones.
3. a kind of fixed point recording system according to claim 2, is characterized in that comprising four microphones.
CN201410094600.9A 2014-03-15 2014-03-15 Fixed-point recording system CN103839553A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410094600.9A CN103839553A (en) 2014-03-15 2014-03-15 Fixed-point recording system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410094600.9A CN103839553A (en) 2014-03-15 2014-03-15 Fixed-point recording system

Publications (1)

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CN103839553A true CN103839553A (en) 2014-06-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107230481A (en) * 2017-05-31 2017-10-03 宇龙计算机通信科技(深圳)有限公司 Noise processing method and terminal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1300042A (en) * 1999-12-14 2001-06-20 松下电器产业株式会社 Method and apparatus for parallelly deducing multiple sound source direction and monitoring sound grade of every moving sound source
CN101013155A (en) * 2006-01-06 2007-08-08 安捷伦科技有限公司 Acoustic location and acoustic signal enhancement
US20070233321A1 (en) * 2006-03-29 2007-10-04 Kabushiki Kaisha Toshiba Position detecting device, autonomous mobile device, method, and computer program product
CN102750952A (en) * 2011-04-18 2012-10-24 索尼公司 Sound signal processing device, method, and program
CN103439688A (en) * 2013-08-27 2013-12-11 大连理工大学 Sound source positioning system and method used for distributed microphone arrays

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1300042A (en) * 1999-12-14 2001-06-20 松下电器产业株式会社 Method and apparatus for parallelly deducing multiple sound source direction and monitoring sound grade of every moving sound source
CN101013155A (en) * 2006-01-06 2007-08-08 安捷伦科技有限公司 Acoustic location and acoustic signal enhancement
US20070233321A1 (en) * 2006-03-29 2007-10-04 Kabushiki Kaisha Toshiba Position detecting device, autonomous mobile device, method, and computer program product
CN102750952A (en) * 2011-04-18 2012-10-24 索尼公司 Sound signal processing device, method, and program
CN103439688A (en) * 2013-08-27 2013-12-11 大连理工大学 Sound source positioning system and method used for distributed microphone arrays

Non-Patent Citations (1)

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Title
林志斌 等: "基于球麦克风阵列的三维空间多声源定位", 《南京大学学报(自然科学)》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107230481A (en) * 2017-05-31 2017-10-03 宇龙计算机通信科技(深圳)有限公司 Noise processing method and terminal

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Application publication date: 20140604