CN106412770A - Wireless-positioning-based acoustic image reproduction system and working method - Google Patents
Wireless-positioning-based acoustic image reproduction system and working method Download PDFInfo
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- CN106412770A CN106412770A CN201611165191.2A CN201611165191A CN106412770A CN 106412770 A CN106412770 A CN 106412770A CN 201611165191 A CN201611165191 A CN 201611165191A CN 106412770 A CN106412770 A CN 106412770A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention relates to the technical field of radio positioning and acoustics, especially to a wireless-positioning-based acoustic image reproduction system and a working method. The system comprises a wireless position detection module and an operation module; the wireless position detection module is used for obtaining a position parameter of a sound source based on a wireless positioning principle; and the operation module is used for calculating a specific sound source position according to a related parameter detected by the wireless position detection module, calculating a specific positin of a sound source, and adjusting a left sound channel and a right sound cahnnel to output stereo audio signals, thereby realizing acoustic image repdocution. The system and the working method have the following beneficial effects: a problem that the existingstage sound irradiation system can not reflect the sound source orientation effectively can be solved; the acoustic image resotring effect is vivid; and the in-situ listening effect is imporved obviously.
Description
Technical field
The present invention relates to radio position finding radio directional bearing and technical field of acoustics, particularly to a kind of sound equipment acoustic image based on wireless location
Playback system and method for work.
Background technology
Existing stage sound reinforcement system typically adopts wired or wireless Mike to gather the sound of spokesman, by power amplifier, sound
The equipment such as case present to audience after being amplified.But this sound is typically all monaural, especially in viewing modern drama, large-scale
During performance, spectators cannot experience the position difference of different spokesman, and proprietary speech seems all to send from same position
, have a strong impact on performing effect.Existing solution mainly has two kinds：One kind is to install stereo Mike before the lights,
But its collection being limited in scope of sound, just has a greatly reduced quality apart from the slightly remote effect of microphone, it is also contemplated that between microphone and sound equipment from
Sharp problem, so the mounting arrangements of stereo Mike are quite loaded down with trivial details and effect on driving birds is not good；Another kind of method is the PAN by sound console
Knob manually controls the acoustic image of each road sound, but complex operation is error-prone, and effect is not accurate..
Content of the invention
The present invention, in order to solve above-mentioned technical problem, provides a kind of sound equipment acoustic image playback system based on wireless location and work
Make method.Sound source is accurately measured by wireless location system（Performer, spokesman etc.）Positional information, more real according to De Boai
Test, the principle such as Haas effect calculates the left and right acoustic channels of adjustment sound source, to realize stereo sound image reproduction, mainly solves existing stage
Sound collection, Play System are difficult to show sound source（Performer, spokesman etc.）The problem of positional information.
This inventive technique scheme includes：Wireless position detecting module and computing module, described wireless position detecting module is used
In the location parameter obtaining sound source by wireless location principle；Described computing module is used for being detected according to wireless position detecting module
Relevant parameter out, calculates the particular location of sound source, and adjusts left and right acoustic channels output stereo audio signal, to realize acoustic image
Reproduce.
Preferably, described wireless position detecting module includes：Wireless transmitting unit and radio receiving unit, described wireless
Transmitter unit is attached to and moves with sound source in sound source, for sending signal to determine the positional information of sound source；Described wireless receiving
Unit is fixed on the appropriate location on place, for receiving the relevant information of wireless transmitting unit, and sends computing module to.
Further preferably, described computing module includes：Position arithmetic element, audio operational unit and audio input output are single
Unit, described position arithmetic element is used for the particular location receiving the information of wireless position detecting module and calculating sound source, typically logical
Cross software or special hardware is realized；Described audio operational unit, for adjusting acoustic pressure, the phase of stereophonic signal left and right acoustic channels
The features such as position, typically pass through software or special hardware is realized；Described audio input output unit, for by the monophone of sound source
Audio channel signal copies as stereophonic signal, and under the control of audio operational unit by the stereophonic signal after adjustment export to
Both the sound reinforcement systems such as sound console, power amplifier had been set.
According to a kind of method of work of above-mentioned sound equipment acoustic image playback system based on wireless location it is：
A, system initialization, each modular unit sets up communication；
B, wireless transmitting unit send pulse signal, when sound source position is mobile, be attached to wireless transmitting unit in sound source with
Movement；
C, radio receiving unit return pulse signal simultaneously send the position arithmetic element of computing module to；
D, position arithmetic element receive the pulse signal of each radio receiving unit, and calculate the positional information of wireless transmitting unit
（The i.e. position of sound source）；
The monophonic signal of sound source is copied as identical two paths of signals, respectively by e, the audio input output unit of computing module
Left and right acoustic channels；
F, the audio operational unit of computing module, according to the sound source position calculating, adjust acoustic pressure, phase place of left and right acoustic channels etc.
Parameter；
Left and right acoustic channels after g, audio input output unit output adjustment are to sound reinforcement systems such as the sound console both having set, power amplifiers；
H, work by predetermined frequency repeat step b to step g, realize the uninterrupted monitoring to sound source position and acoustic image reduces；
I, as needed halt system work.
Using wireless position detecting module described after such scheme by being movably attached to spokesman（Or microphone
On）Wireless transmitting unit, two or more radio receiving unit composition, by the method time of advent, reaching time-difference method, angle of arrival
The methods such as degree method, signal intensity method, the positional information of measuring and calculating spokesman.Described computing module has fortune by computer or single-chip microcomputer etc.
Calculate the software and hardware composition of function, major function is：1. position arithmetic element receives the data of wireless position detecting module, calculating sound
The exact position in source；2. audio input output unit receives the monophonic audio signal of Mike's collection and is copied into double track letter
Number, the sound source position that audio operational unit calculates according to position arithmetic element, former according to De Boai experiment, Haas effect etc.
The parameters such as the acoustic pressure of reason adjustment left and right acoustic channels, phase place, by the stereophonic signal after the output modulation of audio input output unit.
Compared with prior art, the present invention is had the beneficial effects that and is tied wireless location technology with sound equipment acoustic image reproducing technology phase
Close, measure the positional information of spokesman using wireless location technology, location parameter is modulated by monaural audio frequency by computing
In signal so export stereo audio signal, preferably solve existing stage sound reinforcement system and cannot effectively embody sound source side
The problem of position, acoustic image reduction is true to nature, and live audibility improves fairly obvious.
Brief description
The present invention is further illustrated below in conjunction with the accompanying drawings.
Accompanying drawing 1 is the system composition schematic diagram of the present invention
Accompanying drawing 2 is the system flow chart of the present invention
Accompanying drawing 3 is acoustic image reduction principle schematic diagram of the present invention.
Specific embodiment
For the technical characterstic of this programme can be clearly described, below by specific embodiment, this programme is illustrated.
Referring to the drawings 1-3, this embodiment is：Arrange 4 in four corners of stage（At least more than 2, more fixed arrangement is
Position precision is higher）Radio receiving unit.The channel radio such as UWB, Zigbee, Wlan, bluetooth, ultrasound wave, RFID, infrared ray can be adopted
Letter technology, can be provided simultaneously with transmission-receiving function as needed, and this programme adopts UWB technology, and positioning precision reaches decimeter grade, if receiving
Enough and connection and reasonable arrangement can reach Centimeter Level to element number.With spokesman or Mike（Wired Mike, wireless Mike）
Upper additional 1 wireless transmitting unit.Wireless transmitting unit is at set intervals（For reducing system power dissipation, typically can be set as 1
Second）Transmitting pulse signal, 4 radio receiving units are transported by the wired or wireless position being delivered to computing module after receiving signal
Calculate unit.Computing module is made up of computer or single-chip microcomputer, and the position arithmetic element of computing module is according to the method time of advent, arrival
The methods such as time difference method, angle of arrival method, signal intensity method, calculate the particular location of wireless transmitting unit, and then are sent out
Speech people（Sound source）Accurate location.Because of UWB indoor wireless location technology existing maturation scheme, specific implementation repeats no more.
The audio input output unit of computing module receives the monaural audio frequency of Mike, is copied into 2 tunnel audio signals, point
Wei not left and right acoustic channels.According to De Boai experimental principle, position arithmetic element is calculated by the audio operational unit of computing module
The positional information of spokesman be converted into the sound pressure level of left and right acoustic channels；According to Haas effect principle, adjust the phase place of left and right acoustic channels,
And then export final left and right acoustic channels audio signal.Audio signal after adjustment is through equipment such as the existing sound console of stage, power amplifiers
Export to spectators through audio amplifier after process.The arrangement of each modular unit is shown in Fig. 1, and concrete system flow is shown in accompanying drawing 2.
Because of sound source on stage（Spokesman）It is typically in same level, situation about forward lapping, base also seldom occur
This linear distribution parallel with stage, therefore the main measurement horizontal displacement D away from stage center for the sound source in this programme.（See Fig. 3）
Assume that left and right acoustic channels audio amplifier and stage center are arranged on same level straight line, the distance between two audio amplifiers can be recorded in advance
For 2L.In general, sweet spot be located at auditorium middle position, if audio amplifier so far position vertical dimension be H.If
Sweet spot is φ with the angle of both sides audio amplifier, stage central authorities, and the angle with stage central authorities, sound source is θ.If left and right audio amplifier
Acoustic pressure be respectively UL、UR, and the U when sound source is located at stage central authoritiesL=UR=U.
Understood according to De Boai experiment, when sound frequency is less than 700Hz:
①;
When sound frequency is more than 700Hz:
②.
When sound source side shifting to the right, if left side audio amplifier acoustic pressure reduces, the increase of right side audio amplifier acoustic pressure, then 1. it is
For：
Simplification can obtain③
Can obtain in the same manner, 2. in the case of,④
D is only had to be variable in above-mentioned formula, other specification all can measure in advance and draw.By 3., 4. calculatingChange,
And then adjustRealize acoustic image change.
Because the width of voice spectrum distribution, and time variation, along with other sound source (other speeches on stage
The sound of people, dubs in background music, live noise etc.) interference, estimate in some cases, dominant frequency component can be shaken up and down in 700Hz
Swing, thus lead to formula 3./4. between frequent switching, the suddenly big or suddenly small change of sound in result scene.In order to overcome this
Plant phenomenon, the following two kinds technical method can be adopted：
1. using technology as Schmidt trigger in impulse circuit.Such as frequency changes to from low frequency (formula 3)
750Hz, is reconverted into formula 4；And frequency, when high frequency (formula 4) changes to 650Hz, is just converted to formula 3.So leave one
The transition of individual 100Hz is interval, decreases the number of times that the short time toggles.
2. two Frequency points, such as F1=600Hz, F2=800Hz are set.When frequency is less than F1, using formula 3；When frequency
When rate is more than F2, using formula 4；To the frequency being between F1 to F2, according to frequency values, linear interpolation formula 3 and formula 4.
So when frequency tapers to F2 from F1, the value of delta U is the value from formula 3, is gradually transitions the value of formula 4, from
And avoid the occurrence of the mutation of sound size.
When sound source displacement D is more than 17 meters, according to Haas effect, the phase place of adjustable left and right acoustic channels, make left and right acoustic channels
Generation time is poor, to further enhance direction feeling.
When there being multiple spokesman（Sound source）When, can be each spokesman（Sound source）Transmitting equipment set different communications
ID, and then it is made a distinction, to realize positioning and acoustic image reduction respectively.This invention is in fields such as large-scale concert, modern drama, operas
Chorus as information reverting accurately, has good live audibility.
When spokesman is numerous, when need to embody the change in location before and after spokesman, wireless position detecting module can be passed through
Calculating movable displacement, then according to move forward increasing sound, being moved rearwards by reducing the mode of sound to sound
It is adjusted.
According to a kind of above-mentioned method of work of the sound equipment acoustic image playback system based on wireless location it is：
A, system initialization, device power-on is tested oneself, and needs synchronous equipment synchronised clock, each modular unit sets up communication, to system
The input parameter such as U, L, H；
B, wireless transmitting unit are at set intervals（Such as 1 second）Send pulse signal, when sound source position is mobile, be attached to sound
Wireless transmitting unit on source moves；
C, radio receiving unit return pulse signal simultaneously send the position arithmetic element of computing module to；
D, the pulse signal of the position arithmetic element each radio receiving unit of reception, and calculate the positional information of wireless transmitting unit,
Record sound source displacement D（The i.e. position of sound source）；
The monophonic signal of sound source is copied as identical two paths of signals, respectively by e, the audio input output unit of computing module
Left and right acoustic channels；
F, the audio operational unit of computing module are according to the sound source displacement D calculating and sound frequency（Judge whether to be more than
700Hz）, the parameter such as the acoustic pressure of adjustment left and right acoustic channels, phase place；
Left and right acoustic channels after g, audio input output unit output adjustment are to sound reinforcement systems such as the sound console both having set, power amplifiers；
H, operate by predetermined frequency repeat step b to step g, realize the uninterrupted monitoring to sound source position and acoustic image reduces.
Certainly, described above is also not limited to the example above, the present invention without description technical characteristic can by or
Realized using prior art, will not be described here；Above example and accompanying drawing are merely to illustrate technical scheme not
It is limitation of the present invention, reference has preferred embodiment been described in detail to the present invention, the ordinary skill people of this area
Member should be understood.Change that those skilled in the art are made in the essential scope of the present invention, remodeling, add
Or replace without departure from spirit of the invention, also should belong to the claims of the present invention.
Claims (4)
1. a kind of sound equipment acoustic image playback system based on wireless location it is characterised in that：Including wireless position detecting module and fortune
Calculate module, described wireless position detecting module is used for obtaining the location parameter of sound source by wireless location principle；Described computing mould
Block is used for the relevant parameter detecting according to wireless position detecting module, calculates the particular location of sound source, and adjusts left and right sound
Road exports stereo audio signal, to realize acoustic image reproduction.
2. a kind of sound equipment acoustic image playback system based on wireless location according to claim 1, is characterized in that, described wireless
Position sensing module includes：Wireless transmitting unit and radio receiving unit, described wireless transmitting unit is attached in sound source with sound
Source is moved, for sending signal to determine the positional information of sound source；Described radio receiving unit is fixed on the suitable position on place
Put, for receiving the relevant information of wireless transmitting unit, and send computing module to.
3. a kind of sound equipment acoustic image playback system based on wireless location according to claim 1, is characterized in that, described computing
Module includes：Position arithmetic element, audio operational unit and audio input output unit, described position arithmetic element is used for receiving
The information of wireless position detecting module simultaneously calculates the particular location of sound source, typically passes through software or special hardware is realized；Institute
State audio operational unit, for adjusting the features such as acoustic pressure, the phase place of stereophonic signal left and right acoustic channels, typically pass through software or special
Hardware device is realized；Described audio input output unit, for the monophonic audio signal of sound source is copied as stereophonic signal,
And export the stereophonic signal after adjustment to both setting the sound reinforcement systems such as sound console, power amplifier under the control of audio operational unit.
4. a kind of method of work of sound equipment acoustic image playback system based on wireless location according to claim 1 is：
A, system initialization, each modular unit sets up communication；
B, wireless transmitting unit send pulse signal, when sound source position is mobile, be attached to wireless transmitting unit in sound source with
Movement；
C, radio receiving unit return pulse signal simultaneously send the position arithmetic element of computing module to；
D, position arithmetic element receive the pulse signal of each radio receiving unit, and calculate the positional information of wireless transmitting unit
（The i.e. position of sound source）；
The monophonic signal of sound source is copied as identical two paths of signals, respectively by e, the audio input output unit of computing module
Left and right acoustic channels；
F, the audio operational unit of computing module, according to the sound source position calculating, adjust acoustic pressure, phase place of left and right acoustic channels etc.
Parameter；
Left and right acoustic channels after g, audio input output unit output adjustment are to sound reinforcement systems such as the sound console both having set, power amplifiers；
H, operate by predetermined frequency repeat step b to step g, realize the uninterrupted monitoring to sound source position and acoustic image reduces；
I, as needed halt system work.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112738693A (en) * | 2021-01-07 | 2021-04-30 | 惠州Tcl移动通信有限公司 | Method and system for realizing wireless multi-channel home theater based on UWB |
| CN114389732A (en) * | 2022-03-08 | 2022-04-22 | 深圳德威音响有限公司 | Digital sound console tuning system and method |
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| CN1672463A (en) * | 2002-07-31 | 2005-09-21 | 皇家飞利浦电子股份有限公司 | Audio processing system |
| CN101365266A (en) * | 2007-08-06 | 2009-02-11 | 索尼株式会社 | Information processing device, information processing method, and program |
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| JPH03270400A (en) * | 1990-03-19 | 1991-12-02 | Roland Corp | Sound image localization device |
| JP2002084599A (en) * | 2000-09-08 | 2002-03-22 | Yamaha Corp | Method and system for reproducing sound |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112738693A (en) * | 2021-01-07 | 2021-04-30 | 惠州Tcl移动通信有限公司 | Method and system for realizing wireless multi-channel home theater based on UWB |
| CN112738693B (en) * | 2021-01-07 | 2022-08-09 | 惠州Tcl移动通信有限公司 | Method and system for realizing wireless multi-channel home theater based on UWB |
| CN114389732A (en) * | 2022-03-08 | 2022-04-22 | 深圳德威音响有限公司 | Digital sound console tuning system and method |
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Application publication date: 20170215 |