CN104902388B - It is used to implement the low voice speaking of multizone sound volume difference and puts method and system - Google Patents
It is used to implement the low voice speaking of multizone sound volume difference and puts method and system Download PDFInfo
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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
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Abstract
The invention discloses a kind of the low voice speaking of multizone sound volume difference that be used to implement to put method and system.A kind of sound playback method for being used to implement multizone sound volume difference, in turn includes the following steps：S1, setting sound playback area Z1、Z2…、ZNControl point, wherein N >=2；S2, with region Z1Target volume grade l1For reference, setting regions Z2…、ZNTarget volume grade be respectively l2…、lN, and setting regions Z1、Z2…、ZNTarget response vector at interior control point is respectively d1、d2…、dN；S3, loudspeaker array is obtained to region Z1、Z2…、ZNThe transfer function matrix G at control point1、G2…、GN；S4, to transfer function matrix G1、G2…、GNIt adds in default random error interference and obtains the transfer function matrix with random error interferenceS5, the weight vectors w that optimization processing calculates loudspeaker array is carried out.
Description
Technical field
The present invention relates to a kind of the low voice speaking of multizone sound volume difference that be used to implement to put method and device.
Background technology
With the improvement of living standards, television set has become the center of home entertaining life.With reference to shown in Fig. 1, more
Position kinsfolk is when watching program simultaneously by same television set, volume it is impossible to meet all users demand, when be commonly encountered
The problem of volume that certain user experiences is excessive or too small.This is because the Hearing Threshold of human ear can increase as the age increases
Add, therefore the people at different ages is different to the demand of volume, even the people of same age, as to sound sensitive journey
Spend different, there is also the differences to loudness perception.The sound equipment that general television set carries is two-channel, can not be met in difference
The user in region is to the different demands of volume.Although current soundbar sound equipments employ array format, but its main purpose
Optimize for tonequality, do not have different zones generate different volumes with and meanwhile meet the function of multiple user's volume demands.
Although patent CN103379406A refers to the sound equipment composition array of multiple narrow frame television sets, gathered sound using Wave beam forming
Collection is in user area, but itself and unrealized different zones difference volume, and always there are of all kinds for another aspect loudspeaker array
Error, the presence of this error can greatly reduce the performance of system.
It is not provided with the function of multizone sound volume difference for existing sound equipment, while goes to overcome without providing strategy yet
The defects of systematic error, is, it is necessary to find simple and effective method to provide the function of multizone difference volume, while provide effective
Method come overcome due to system random error interference introduce degradation problem.
The content of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of sound playback methods for being used to implement multizone sound volume difference
And system.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of sound playback method for being used to implement multizone sound volume difference, which is characterized in that in turn include the following steps：
S1, setting sound playback area Z1、Z2...、ZNControl point, wherein N >=2；
S2, with region Z1Target volume grade l1For reference, setting regions Z2...、ZNTarget volume grade be respectively
l2...、lN, and setting regions Z1、Z2...、ZNTarget response vector at interior control point is respectively d1、d2...、dN；
S3, loudspeaker array is obtained to region Z1、Z2...、ZNThe transfer function matrix G at control point1、G2...、GN；
S4, to transfer function matrix G1、G2...、GNDefault random error interference is added in obtain with random error interference
Transfer function matrix
S5, the weight vectors w that optimization processing calculates loudspeaker array is carried out.
Preferably, in step S1, after laying loudspeaker array, the control point of setting sound playback area.
Preferably, in step S2, target response vector meets following condition：
Wherein (di)HFor amount of orientation diConjugation, (d1)HFor amount of orientation d1Conjugation.
Preferably, in step S3, transfer function matrix passes through acoustic instrument B＆K, AP etc. or soft by numerical modeling
The acquisitions such as part comsol.
Preferably, the random error interference includes one kind in the interference of multiplying property random error, the interference of additivity random error
Or two kinds.
It is highly preferred that in step S4, the transfer function matrix with random error interference meets following condition：
WhereinRepresenting matrix dot product,WithThe respectively interference of multiplying property random error and the interference of additivity random error.
Further, multiplying property random error is disturbedExpression formula be：
Additivity random error is disturbedExpression formula be：
Wherein, S be loud speaker number, PiFor ZiThe control point number in region,WithIt is to raise one's voice for s-th respectively
Device is to ZiPth in regioniDefault the multiplying property random error interference of the transmission function with random error interference at a control point
Amplitude and phase,WithIt is s-th of loud speaker respectively to ZiPth in regioniBeing done with random error at a control point
The amplitude and phase of the default additivity random error interference for the transmission function disturbed.
Further, the amplitude of the multiplying property random error interferenceIt is independent mutually, phaseIt is independent mutually, and
AmplitudeWith phaseIt is independent mutually；All amplitudesProbability distribution it is identical, all phasesProbability distribution point
Cloth is identical.
Further, the amplitude of the additivity random error interferenceIt is independent mutually, phaseIt is independent mutually, and
AmplitudeWith phaseIt is independent mutually；All amplitudesProbability distribution it is identical, all phasesProbability distribution phase
Together.
Preferably, in step S5, optimizing the problem of handling is：
Wherein,To takePhase
Prestige value,ForTwo norms square, the weight vectors w be the problem optimal solution.
It is highly preferred that the weight vectors w is obtained as follows：
S501, calculating matrix Q1, Q1Expression formula be：
Wherein G=[G1；G2···GN], For multiplying property random error noise amplitudesProbability density letter
Number,Phase is disturbed for multiplying property random errorProbability density function；
S502, calculating matrix Q2, Q2Expression formula be：
Wherein For additivity random error noise amplitudesProbability density function,It is random for additivity
Error interference phaseProbability density function；
S503, calculating matrix Q3, Q3Expression formula be；
Wherein Re { } expressions take real,
Gp,sIt is the pth row s column elements of matrix G,
S504, calculating matrix Q4, Q4Expression formula be；
Q4=μme,bμme,θG；
S405, according to matrix Q1、Q2、Q3And Q4The expression formula for obtaining weight vectors w, w is；
A kind of sound-reproducing system for being used to implement the sound playback method, including：
Cloth amplification module specifies each loudspeaker position of loudspeaker array and sound playback area Z1、Z2...、ZNControl point
Position；
Target volume setting module, with region Z1Target volume grade l1For reference, setting regions Z2...、ZNTarget
Level of sound volume is respectively l2...、lN, and setting regions Z1、Z2...、ZNTarget response vector at interior control point is respectively d1、
d2...、dN；
Transfer function matrix acquisition module obtains loudspeaker array to region Z1、Z2...、ZNThe transmission function square at control point
Battle array G1、G2...、GN；
Default random error interference module, to transfer function matrix G1、G2...、GNDefault random error interference is added in obtain
The transfer function matrix of random error interference must be carried
Weight vector computation module carries out the weight vectors w that optimization processing calculates loudspeaker array.
The present invention uses more than structure, has the following advantages that compared with prior art：
A, can be simultaneously difference provided by the present invention for realizing that the low voice speaking of multizone sound volume difference puts method and device
Zone user provides different volumes when listening to same source of sound, when overcoming same source of sound, since the sensitivity that has sharp ears is poor
It is different that different user is caused to perceive volume different problems, improve comfort when multidigit user listens to same source of sound.
It B, can be each with dynamic regulation provided by the present invention for realizing that the low voice speaking of multizone sound volume difference puts method and device
Sound volume difference between region, so as in the case where not changing hardware configuration, meet need of the different audients to volume
It asks, further enhances flexibility, improve user experience.
C, provided by the present invention for realizing that the low voice speaking of multizone sound volume difference puts method and device, using to transmission function
Matrix adds in the strategy of default random error interference, by optimizing being averaged under the interference of all random errors mean square error
Value, reaches under arbitrary error condition, all with smaller mean square error, reduces the sensitivity to systematic error, improve
To the anti-interference of systematic error.
Description of the drawings
Fig. 1 is a kind of application scenarios of the present invention, i.e., more people are simultaneously using the schematic diagram of same television set；
Fig. 2 is the signal flow graph of the sound playback method of the present invention；
Fig. 3 is the simulation configurations schematic diagram of the present invention；
Fig. 4 puts result schematic diagram for the low voice speaking of the embodiment of the present invention one；
Fig. 5 is that the low voice speaking Comparative result of putting of Robust Method used by non-robust method and the embodiment of the present invention two shows
It is intended to.
Specific embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be understood by the person skilled in the art.
Embodiment 1
Fig. 2 show the sound playback method of the present invention, and Fig. 3 show the application scenarios of the present embodiment.With reference to Fig. 2 and Fig. 3
It is shown, step S1：Loudspeaker array is laid, being used in the present embodiment includes 8 loudspeaker units being arranged in a linear, i.e., linear
Array；In others are implemented, circular array, random array etc. also can be used in loudspeaker array.Two neighboring loudspeaker unit
Spacing for 4cm, the spacing of the loudspeaker unit of two ends is 28cm, with close with the aerial wavelength of 1200Hz sound waves.
According to user's number, the present embodiment has divided two and has treated the low voice speaking region put, i.e. region Z1And Z2, the center in two regions
Respectively positioned at the orientation of each 20 ° of the left and right of loudspeaker array perpendicular bisector, and it is with the spacing of the center of loudspeaker array
1.5m, and be located at loudspeaker array in same level；Specifically, two regions are substantially arc-shaped, and positioned at same
On circle, the circle using the center of loudspeaker array be the center of circle and radius as 1.5m, the central angle in two regions is 20 °, area
Domain Z1And Z2It is equally spaced to take 20 control points, 1 ° of any two adjacent control points interval, frequency of sound wave scope for 100~
4000Hz。
The environment of embodiment one is free found field, and it is 1 that default multiplying property error is permanent, and permanent additive errors are 0, that is, are not present
Random error is disturbed, and is a kind of special case of the sound playback method of the present invention.By step S2-S5 to region Z1And Z2It carries out low voice speaking
It puts.Specifically, setting regions Z1Level of sound volume l at each control point1It is preset as with reference to 0dB, region Z2Volume at control point is equal
Forl23dB, 6dB, 10dB are taken respectively, herein l2As default region Z2With region Z1Between sound volume difference, use
Solution procedure S501, S502, S503, S503, S504, S505 are to the criterion of least squares optimal problem based on robustnessIt solves, obtains weight vectors w, and according to weight vectors w to the amplitude of above-mentioned 8 loudspeaker units
It is controlled with phase.
Observation is actual to obtain region Z2With region Z1Between sound volume difference.Fig. 4, which gives, works as l2Take respectively 3dB, 6dB,
During 10dB, region Z2With region Z1Between sound volume difference with frequency variation relation, it is of the invention low voice speaking to put with reference to shown in Fig. 4
Method can obtain default sound volume difference substantially in entire frequency range.
The sound-reproducing system of the present embodiment includes：
Cloth amplification module specifies each loudspeaker position of loudspeaker array and sound playback area Z1、Z2...、ZNControl point
Position；
Target volume setting module, with region Z1Target volume l1For reference, setting regions Z2...、ZNTarget volume
Respectively l2...、lN, and setting regions Z1、Z2...、ZNTarget response vector at interior control point is respectively d1、d2...、dN；
Transfer function matrix acquisition module obtains loudspeaker array to region Z1、Z2...、ZNThe transmission function square at control point
Battle array G1、G2...、GN；
Default random error interference module, to transfer function matrix G1、G2...、GNDefault random error interference is added in obtain
The transfer function matrix of random error interference must be carried
Weight vector computation module carries out the weight vectors w that optimization processing calculates loudspeaker array.
Embodiment 2
The present embodiment is basic as in the first embodiment, differing only in：There are agitation error in the sound field of the present embodiment, wherein,
Multiplying property random error interference magnitude is uniformly distributed in [0.5,1.5] interval range, and phase is in [- 10 °, 10 °] interval range
It is uniformly distributed；Additivity random error interference magnitude is uniformly distributed in [0,0.5] interval range, and phase is in [- 180 °, 180 °] area
Between in the range of be uniformly distributed.
Fig. 5 for non-robust method and the present embodiment used by the low voice speaking of Robust Method put Comparative result schematic diagram,
Wherein default level of sound volume difference is 6dB.In non-robust method, without considering agitation error factor；The present embodiment it is low voice speaking
Method is put using Robust Method, considers agitation error interference, the agitation error interference of sound field is the random error of the present invention
Interference.With reference to shown in Fig. 5, when sound field is there are during random error interference, non-robust method performance drastically declines, and two interregional
Sound volume difference is there's almost no, and Robust Method using the present invention, actual volume difference and default sound volume difference are basic
Unanimously.
The present invention not only allows for multiplying property error and has also contemplated additive errors, and probability of error distribution function need not be done
Complexity constraints, applicable scope is more extensive, while only needs to know a small amount of error probable model parameter in calculating process, calculates
It is convenient.The present invention can allow system to adapt to different error environment, so as to increase by adjusting a small amount of error probable model parameter
Strong system flexibility, simplifies system configuration.
The above embodiments merely illustrate the technical concept and features of the present invention, is a kind of preferred embodiment, and purpose exists
It can understand present disclosure in person skilled in the art and implement according to this, the protection of the present invention can not be limited with this
Scope.The equivalent transformation or modification that all Spirit Essences according to the present invention are made, should all cover protection scope of the present invention it
It is interior.
Claims (11)
1. a kind of sound playback method for being used to implement multizone sound volume difference, which is characterized in that in turn include the following steps：
S1, setting sound playback area Z1、Z2…、ZNControl point, wherein N >=2；
S2, with region Z1Target volume grade l1For reference, setting regions Z2…、ZNTarget volume grade be respectively l2…、
lN, and setting regions Z1、Z2…、ZNTarget response vector at interior control point is respectively d1、d2…、dN, target response vector is completely
The following condition of foot：
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<mi>N</mi>
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WhereinFor amount of orientation diConjugation,For amount of orientation d1Conjugation；
S3, loudspeaker array is obtained to region Z1、Z2…、ZNThe transfer function matrix G at control point1、G2…、GN；
S4, to transfer function matrix G1、G2…、GNIt adds in default random error interference and obtains the biography with random error interference
Delivery function matrix
S5, the weight vectors w that optimization processing calculates loudspeaker array is carried out.
2. sound playback method according to claim 1, which is characterized in that in step S1, after laying loudspeaker array, setting
The control point of sound playback area.
3. sound playback method according to claim 1, which is characterized in that in step S3, transfer function matrix passes through instrument
Measurement or numerical modeling obtain.
4. sound playback method according to claim 1, which is characterized in that in step S4, the random error interference includes
One or both of the interference of multiplying property random error, the interference of additivity random error.
5. sound playback method according to claim 4, which is characterized in that in step S4, the biography with random error interference
Delivery function matrix meets following condition：
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WhereinRepresenting matrix dot product,WithThe respectively interference of multiplying property random error and the interference of additivity random error.
6. sound playback method according to claim 5, which is characterized in that multiplying property random error is disturbedExpression formula be：
Additivity random error is disturbedExpression formula be：
Wherein, S be loud speaker number, PiFor ZiThe control point number in region,WithIt is s-th of loud speaker respectively to Zi
Pth in regioniThe amplitude of default the multiplying property random error interference of the transmission function with random error interference at a control point
And phase,WithIt is s-th of loud speaker respectively to ZiPth in regioniCarry what random error was disturbed at a control point
The amplitude and phase of the default additivity random error interference of transmission function.
7. sound playback method according to claim 6, which is characterized in that the amplitude of the multiplying property random error interference
It is independent mutually, phaseIt is independent mutually, and amplitudeWith phaseIt is independent mutually；All amplitudesProbability distribution phase
Together, all phasesProbability distribution distribution it is identical.
8. sound playback method according to claim 6, which is characterized in that the amplitude of the additivity random error interference
It is independent mutually, phaseIt is independent mutually, and amplitudeWith phaseIt is independent mutually；All amplitudesProbability distribution phase
Together, all phasesProbability distribution it is identical.
9. sound playback method according to claim 1, which is characterized in that in step S5, optimizing the problem of handling is：
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Wherein,D=[d1；d2…；dN],To takeDesired value,ForTwo norms square, the weight vectors w be the problem optimal solution.
10. the sound playback method according to claim 1 or 9, which is characterized in that the weight vectors w is as follows
It obtains：
S501, calculating matrix Q1, Q1Expression formula be：
Wherein G=[G1；G2…GN], For multiplying property random error noise amplitudesProbability density letter
Number,Phase is disturbed for multiplying property random errorProbability density function,WithRespectively two sound playback areas
Multiplying property random error interference phase, s is s-th of loud speaker in S loud speaker, piFor ZiThe P in regioniIn a control point
PthiA control point；
S502, calculating matrix Q2, Q2Expression formula be：
Wherein fbaeFor additivity random error noise amplitudesProbability density function,It is random for additivity
Error interference phaseProbability density function；
S503, calculating matrix Q3, Q3Expression formula be；
Wherein Re { } expressions take real, Gp,s
It is the pth row s column elements of matrix G,
S504, calculating matrix Q4, Q4Expression formula be；
Q4=μme,bμme,θG；
S405, according to matrix Q1、Q2、Q3And Q4The expression formula for obtaining weight vectors w, w is；
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11. a kind of be used to implement such as the sound-reproducing system of claim 1-10 any one of them sound playback methods, feature exists
In, including：
Cloth amplification module specifies each loudspeaker position of loudspeaker array and sound playback area Z1、Z2…、ZNThe position at control point；
Target volume setting module, with region Z1Target volume grade l1For reference, setting regions Z2…、ZNTarget volume etc.
Grade is respectively l2…、lN, and setting regions Z1、Z2…、ZNTarget response vector at interior control point is respectively d1、d2…、dN；
Transfer function matrix acquisition module obtains loudspeaker array to region Z1、Z2…、ZNThe transfer function matrix G at control point1、
G2…、GN；
Default random error interference module, to transfer function matrix G1、G2…、GNIt adds in default random error interference and obtains band
There is the transfer function matrix that random error is disturbed
Weight vector computation module carries out the weight vectors w that optimization processing calculates loudspeaker array.
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| CN201510224357.2A CN104902388B (en) | 2015-05-06 | 2015-05-06 | It is used to implement the low voice speaking of multizone sound volume difference and puts method and system |
| PCT/CN2015/098861 WO2016177005A1 (en) | 2015-05-06 | 2015-12-25 | Sound playback method and system for realizing sound volume differences in multiple zones |
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| CN110677786B (en) * | 2019-09-19 | 2020-09-01 | 南京大学 | Beam forming method for improving space sense of compact sound reproduction system |
| CN112565972B (en) * | 2020-12-01 | 2022-06-10 | 南京邮电大学通达学院 | Iteration method for loudspeaker placement optimization in multi-zone sound field playback system |
| CN114915874B (en) * | 2021-02-10 | 2023-07-25 | 北京全景声信息科技有限公司 | Audio processing method, device, equipment and medium |
| CN117076843B (en) * | 2023-08-18 | 2024-05-17 | 上海工程技术大学 | Method for establishing in-car acoustic transfer function error model |
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| CN103916730A (en) * | 2013-01-05 | 2014-07-09 | 中国科学院声学研究所 | Sound field focusing method and system capable of improving sound quality |
| WO2014151817A1 (en) * | 2013-03-14 | 2014-09-25 | Tiskerling Dynamics Llc | Robust crosstalk cancellation using a speaker array |
| CN104469595A (en) * | 2014-10-30 | 2015-03-25 | 苏州上声电子有限公司 | Multi-area sound reproduction method and device based on error model |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916730A (en) * | 2013-01-05 | 2014-07-09 | 中国科学院声学研究所 | Sound field focusing method and system capable of improving sound quality |
| WO2014151817A1 (en) * | 2013-03-14 | 2014-09-25 | Tiskerling Dynamics Llc | Robust crosstalk cancellation using a speaker array |
| CN104469595A (en) * | 2014-10-30 | 2015-03-25 | 苏州上声电子有限公司 | Multi-area sound reproduction method and device based on error model |
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