CN102611962A - Airspace response balance and sound field control method and device of microphone array based on wireless communication network - Google Patents
Airspace response balance and sound field control method and device of microphone array based on wireless communication network Download PDFInfo
- Publication number
- CN102611962A CN102611962A CN2012100280319A CN201210028031A CN102611962A CN 102611962 A CN102611962 A CN 102611962A CN 2012100280319 A CN2012100280319 A CN 2012100280319A CN 201210028031 A CN201210028031 A CN 201210028031A CN 102611962 A CN102611962 A CN 102611962A
- Authority
- CN
- China
- Prior art keywords
- node
- processing unit
- central processing
- microphone
- nodes
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses an airspace response balance and sound field control method and a device of a microphone array based on a wireless communication network. The method comprises the steps that: 1) a central processor starts all wireless microphone nodes sequentially to play template signals; 2) all the wireless microphone nodes transmit acquired pulse response information of all wireless microphone nodes to the central processor; 3) the central processor performs space response balance and sound field control algorithm and distributes calculated parameters to all wireless microphone nodes; and 4) the central processor starts all the wireless microphone nodes to be in a working state to play sound source files. The device comprises three modules, i.e. a plurality of wireless microphone nodes, a central processor and a plurality of wireless speaker nodes; and the modules are connected sequentially in sequence. According to the method and the device, automatic measurement and acquisition of space multi-position point pulse response information are realized; high work load and realization complexity in a traditional measuring method are avoided; and the intellectualization and networking levels of a sound replay system are improved.
Description
Technical field
the present invention relates to a kind of roomage response balanced and sound field control method and device of loudspeaker array, particularly a kind of loudspeaker array roomage response based on cordless communication network balanced and sound field control method and device.
Background technology
loudspeaker unit is in the practical set use; Can receive the influence of existing boundary face of surrounding space environment and sound scatterer; Cause occurring more sound reflecting and diffraction phenomena; Thereby caused the frequency response curve at radiated sound field each location point place more peak valley to occur, caused the distortion of reduction acoustic image in the space.Especially in narrow and small and complicated enclosure space; The peak valley of its unit each location point response curve in the space will be very serious; Therefore in practical project is used; Need to rely on professional audition personnel smoothing processing to be carried out in the response of each frequency range of system, eliminate the frequency response curve peak valley fluctuation characteristic in the listening area by equalizer.In order to reach balanced to the frequency response of a plurality of LisPos points in space; Just need professional tuning and engineering staff that the pulse respond of playback system a plurality of location points in the space is carried out pointwise test and data acquisition; And the impulse response data that obtains is sent to carries out tuning in the equalizer and handle, it is this that to obtain the work of impulse response according to the manual measurement method very complicated time-consuming.In addition; In sound field control field; The impulse response information at each loudspeaker unit multiposition point place in the space in order to improve the performance of sound field control algolithm in the enclosure space, need be measured equally in advance in application scenarios such as the beam direction of picture loudspeaker array is controlled, surrounding is stereo; This method of obtaining the space impulse response message based on the manual measurement means; Make the practicality of many sound field control algolithms receive very big restriction, be difficult to put into practical occasion easily, thereby hindered further developing of sound field control algolithm.
are along with the cordless communication network technology rapid development; Various wireless network platforms have appearred on the market; As infrared, bluetooth, Wi-Fi, Zigbee, UWB etc.; Thereby microphone and loudspeaker unit have occurred, but these systems only are conceived to wireless speech transmission aspect, only consider sound reinforcement system is carried out networking based on wireless network; Improve the portable degree of sound reinforcement system; But do not consider not utilize the technology platform of wireless network to carry out the information processing on the network significance, and consideration useless builds up the interconnected network platform with a plurality of radio microphone nodes and a plurality of wireless speaker groups of nodes, for the Processing Algorithm of some level of information provides superior physical platform.The convenience of information interaction between the various network nodes that these cordless communication network platforms are provided; For the solution balanced and sound field control problem of the roomage response of loudspeaker array provides a kind of new realization approach based on information processing; The complicated time-consuming work that will avoid some originally to introduce based on the algorithm of signal processing, thus the intelligent level of various equilibriums and sound field control algolithm can be improved.
existing speaker volume response equilibrium and sound field control algolithm all are to depend on the impulse response information that the manual measurement means are obtained a plurality of location points of speaker volume; Bring very big obstacle for the practicality of algorithm; These algorithms remain the optimized Algorithm that rests on the signal processing level simultaneously; Do not introduce the notion of network connection and information interaction, algorithm is not risen on the level of information processing, thereby caused a lot of algorithms lack of wisdom property in practicality.Balanced and existing defective of sound field control method and deficiency to existing loudspeaker array roomage response; Need to seek more efficiently roomage response equilibrium and sound field control method; To improve the intelligent level of algorithm; For the convenient use of algorithm provides new technological approaches, and make the balanced system and device of controlling with sound field of speaker volume response with more high-intelligentization level.
Summary of the invention
the object of the present invention is to provide a kind of response of loudspeaker array spatial domain balanced and sound field control method and device based on cordless communication network in order to overcome existing loudspeaker array roomage response balanced and existing defective of sound field control method and deficiency.
In order to reach above purpose, the technical scheme that the present invention adopts is: response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network comprise the steps:
1. central processing unit starts each wireless speaker node play template signal successively;
2. the roomage response information of each the wireless speaker node that will gather successively of all radio microphone nodes sends to central processing unit;
3. central processing unit is carried out the balanced and sound field control algolithm of roomage response, and the parameter that calculates is distributed to each loud speaker node;
4. central processing unit start all wireless speaker nodes entering operating states broadcast audio files.
Further; In the step 1; Central processing unit starts each wireless speaker node successively, after central processing unit receives the instruction that roomage response is balanced or sound field is controlled, carries out the measuring task of space impulse response with starting all radio microphone nodes; Realize the flow process such as the accompanying drawing 1 of this space impulse response measurement task, may further comprise the steps:
A. central processing unit starts all radio microphone nodes; And detect all microphone nodes and whether normally start; If there is certain node to occur normally to start situation, then reports, and enter into the handling process of abnormal conditions to central processing unit; If all nodes all normally start, then get into next link;
<b >B. central processing unit will be provided with variable p and equal 0; And whether detection variable p less than N, and wherein N is the quantity of loud speaker node, if variable p is not less than N; Then close all microphone nodes and N-1 loud speaker node, enter into finding the solution the stage of space equilibrium and sound field control algolithm; If variable p<N notifies p wireless speaker node to prepare to play, and notifies all radio microphone nodes to prepare to receive simultaneously;</b>
C. whether the preparation of central processing unit all microphone nodes of detection and P wireless speaker node has finished; If certain node remains unfulfilled preparation; Central processing unit will be taked corresponding special processing to this node of not accomplishing preparation; If the preparation of all microphone nodes and p wireless speaker node has all finished; Then order p wireless speaker node to begin the play template signal; Wherein template signal is the signal specific that is used for the response of testing of loudspeakers space impulse, and in the process of p loud speaker node play template signal, all microphone nodes receive by template signal at the different spatial positions point and encourage the response message that produces;
Whether the response message that all radio microphone nodes of
d. central processing unit detection receive is complete; If certain microphone node does not receive complete corresponding information; Central processing unit then carries out the particular processing flow process to this microphone node; If all microphone nodes have all received complete impulse response information, then close P wireless speaker node and make P increase by 1 back and get into detection variable p whether less than the link of N.
Further, among the step a, whether central processing unit need detect all radio microphone nodes and all normally start, and realizes the flow process such as the accompanying drawing 2 of this detection, may further comprise the steps:
<b >A1. central processing unit is provided with variable q and equals 0; Whether detection variable q is less than M then; M is the quantity of radio microphone node; If variable q is not less than M, inform that then the inspection of all microphone nodes startup situation of central processing unit finishes, central processing unit can enter into the execution of next link; If variable q<M then notifies q radio microphone node to upload the state information that self starts situation to central processing unit;</b>
<b >A2. central processing unit is checked judgement to the state information that q radio microphone node starts situation, if it is normal to be checked through the state information of this microphone node startup situation, then central processing unit will increase by 1 to variable q, continue to jump to q<The detection link of M; If it is undesired to be checked through the state information of this microphone node startup situation, then central processing unit will be attempted repeating to send enabled instruction and notifying it to upload the state information of startup situation according to the time interval of △ T to q radio microphone node; If at T</b><sub ><b >d</b></sub><b >The state information of this node startup situation is normal in time period, then jumps to the link to variable q increase by 1, if at T</b><sub ><b >d</b></sub><b >The state information of this microphone node startup situation is still undesired in time period; Then this node is carried out failure diagnosis; Confirm its failure cause and inform user's place under repair, if the user then closes all nodes to repairing request-reply; Show malfunctioning node numbering and failure cause, wait for that the user repairs; If the user then deletes this node automatically to repairing the request no response, and with malfunctioning node numbering and the daily record of failure cause write error, and notify the user this deletion action, and then jump to link to variable q increase by 1.</b>
further, central processing unit described in the step a starts each wireless speaker node successively, in implementation procedure; What central processing unit need detect that each radio microphone node uploads self starts the state information of situation, thisly starts the state information of situation about self, is a string specific code word; For example; When self starting state of microphone node just often, will export code word " 1111101011111010 ", when self starting state of microphone node is undesired; To export code word " 0101000001010000 ", the length and the content of this string certain code word can define according to practical engineering application.
Further; Among the step b,, then close all microphone nodes and N-1 loud speaker node if variable p is not less than N; Enter into finding the solution the stage of space equilibrium and sound field control algolithm; Central processing unit need detect all microphone nodes and whether N-1 loud speaker node has all closed, and realizes the flow process such as the accompanying drawing 7 of this testing process, may further comprise the steps:
B1. central processing unit is provided with variable q and equals 0, and whether detection variable q is less than M, and M is the quantity of radio microphone node, if variable q is not less than M, then central processing unit sends the instruction of cutting out N-1 wireless speaker node electric power system; If variable q is less than M, then central processing unit sends the instruction of cutting out q radio microphone node electric power system;
b2. central processing unit checks whether the electric power system of q radio microphone node closes; The method whether this detection node closes; Can adopt central processing unit to send query statement, be used for the situation of closing of query node, if node is to this query statement no response to detected node; Represent that then this node normally closes, the node that central processing unit returns this no response instruction is regarded as and is got into closed condition; If the electric power system of q node has been closed, then make variable q increase by 1 and continue to jump to variable q whether less than the judgement link of M.If the electric power system of q node is not closed yet, variable c then is set equals 0;
B3. whether central processing unit detection variable c is less than C
0
, C
0
For the number of times that q radio microphone node electric power system instructed is closed in transmission, if variable c is not less than C
0
, then central processing unit will can't cut out the diagnosing malfunction analysis of electric power system to q radio microphone node, confirm its reason, and inform user's place under repair operation; If user answer should be repaired request, then central processing unit will cut out all loud speakers and microphone node, show the numbering and the failure cause of malfunctioning node, wait for that the user repairs; If user's dont answer is repaired request; Then central processing unit is abandoned the shutoff operation of q radio microphone node; And the fault write error daily record that this can't be closed informed this operation of abandoning closing of user simultaneously, jump to the execution of next link then; If variable c is less than C
0
, then central processing unit continues to send the instruction of cutting out q microphone node electric power system, checks then whether its electric power system closes, if close, then jumps to the link that makes variable q increase by 1, if do not close yet, whether then jumps to c less than C
0
The judgement link, attempt to continue send out code;
are when b4. is not less than M as variable q; Central processing unit gets into the flow process of cutting out N-1 wireless speaker node; Central processing unit sends out code to N-1 wireless speaker, checks then whether the electric power system of this node closes, if the electric power system of this node is closed; The task of closing of then informing all nodes of central processing unit is finished, and can get in the execution of next link; If the electric power system of this node is not closed yet, then the implementation with q radio microphone node is identical, attempts repeatedly sending the operation of out code, if still can not close, then gets into the failure diagnosis link.
Further, among the step c, whether the broadcast preparation that central processing unit need detect p wireless speaker node is ready with the reception preparation of all radio microphone nodes, realizes the flow process such as the accompanying drawing 3 of this detection, may further comprise the steps:
C1. central processing unit is provided with variable q and equals 0, and whether detection variable q less than M, and M is the quantity of radio microphone node, if q is not less than M, the preparation that then gets into p wireless speaker unit detects link; If q less than M, then notifies q radio microphone node to upload the state information of self preparation to central processing unit;
C2. central processing unit will check whether the state information of q radio microphone node preparation is normal, if the state information of this node preparation is normal, then make variable q increase by 1, continue to carry out q whether less than the judgement of M; If the state information of this node preparation is undesired, variable t then is set equals 0;
C3. whether central processing unit detection variable t is less than T
d
If variable t is less than T
d
, then central processing unit continues to notify q radio microphone node to prepare to receive and upload the state information of preparation to it;
C4. whether q the radio microphone node in central processing unit inspection ground to upload the state information of self preparation normal; If state information is normal, then make variable q increase by 1, if state information is still undesired; Then make variable t increase △ T, whether continue to get into t less than T
d
The judgement stage;
If c5. variable t is not less than T
d
, then central processing unit will carry out failure diagnosis to q radio microphone node, confirm its failure cause and report user's place under repair operation; Then whether central processing unit will detect the user and repair operation replied; Reply if the user makes, then close all microphone nodes and loud speaker node, show the numbering and the failure cause of malfunctioning node; Wait for user's place under repair; Do not reply if the user makes, then central processing unit will be in network q radio microphone node having broken down of deletion automatically, and be written to error log with malfunctioning node numbering and failure cause and to the deletion action of this malfunctioning node; Inform this deletion action of user simultaneously, and then jump to link variable q increase by 1;
C6. when variable q is not less than M; Central processing unit has promptly been accomplished the detection of situation that all microphone nodes are prepared; Change the detection-phase of situation that p wireless speaker node prepared over to, at first notify p wireless speaker node to upload the state information of preparation to central processing unit;
C7. central processing unit checks whether the state information of p wireless speaker node preparation is normal; If the state information of this node preparation is normal; The inspection of then informing all node preparations of central processing unit finishes, and can carry out next link; If the state information of this node preparation is undesired, variable t then is set equals 0;
C8. whether central processing unit detection variable t is less than T
d
If variable t is less than T
d
, then central processing unit continues to notify p wireless speaker node to prepare to play and upload the state information of preparation to it;
C9. whether p the wireless speaker node in central processing unit inspection ground to upload the state information of self preparation normal; If state information is normal; The inspection of then informing all node preparations of central processing unit finishes, and can carry out next link, if state information is still undesired; Then make variable t increase △ T, whether continue to get into t less than T
d
The judgement stage;
If c10. variable t is not less than T
d
, then central processing unit will carry out failure diagnosis to P wireless speaker node, confirm its failure cause and report user's place under repair operation; Then whether central processing unit will detect the user and repair operation replied, and reply if the user makes, and then close all microphone nodes and loud speaker node; The numbering and the failure cause that show malfunctioning node; Wait for user's place under repair, do not reply if the user makes, then central processing unit will be in network p wireless speaker node having broken down of deletion automatically; And be written to error log with malfunctioning node numbering and failure cause and to the deletion action of this malfunctioning node; Inform this deletion action of user simultaneously, and then inform that the inspection of central processing unit node preparation finishes, and can carry out next link.
preferably, central processing unit described in the step c starts each wireless speaker node successively, in implementation procedure; Central processing unit need detect the state information that p wireless speaker node play preparation and all radio microphone nodes reception preparations; The state information of these node preparations also is a string specific code word, for example, and after node is ready; To export code word " 1010111110101111 "; Prepare still imperfect tense when node, will export code word " 0000010100000101 ", the length and the content of this string certain code word can define according to practical engineering application.
Further, in the steps d, whether the response message that all radio microphone nodes of central processing unit detection receive is complete, and the flow process of this detection such as accompanying drawing 4 may further comprise the steps:
D1. central processing unit is provided with variable q and equals 0; Whether detection variable q is less than M, and M is the quantity of radio microphone node, if variable q is not less than M; Inform that then the data integrity inspection of all microphone nodes of central processing unit accomplishes, can get into the execution of next link; If variable q is less than M; Then notify q radio microphone node to carry out the integrity detection of data; And upload the examining report of data integrity to central processing unit, the integrality that wherein receives data can be judged according to the size of the cross-correlation degree that receives signal and template signal;
D2. the data integrity examining report uploaded of central processing unit inspection microphone node if check result is normal, then makes variable q increase by 1, continues to jump to variable q whether less than the judgement link of M; If check result is undesired, variable c then is set equals 0;
D3. whether central processing unit detection variable c is less than C
0
, C
0
Be the number of times of p wireless speaker node repeat play template signal, if c is not less than C
0
, then central processing unit will carry out failure diagnosis to q radio microphone node, confirm failure cause and report the user place under repair; Then central processing unit will detect the user whether repair operation will be replied; If the user has made and having replied, then close all microphones and loud speaker node, show the numbering and the failure cause of malfunctioning node; Wait for user's place under repair; Do not reply if the user makes, then central processing unit will be in network q radio microphone node having broken down of deletion automatically, and be written to error log with malfunctioning node numbering and failure cause and to the deletion action of this malfunctioning node; Inform this deletion action of user simultaneously, and jump to the execution link that makes variable q increase by 1; If c is less than C
0
, then central processing unit will start p wireless speaker node preparation broadcast, notify q radio microphone node to prepare to receive simultaneously;
Whether the preparation of d4. checking p wireless speaker node and q radio microphone node finishes, if do not finish, whether then central processing unit can attempt repeating to send preparation instruction according to the time interval of △ T, and detect and prepare to accomplish, if at T
d
Time period interior nodes preparation can be accomplished, and then jumps to next link and orders p loudspeaker plays template signal; If at T
d
This node still fails to accomplish preparation in time period, then this node is carried out failure diagnosis, confirms reason and notifies the user to repair; If the user makes the request of repairing and replying; Then close all nodes; Demonstration malfunctioning node numbering and failure cause wait for that the user repairs, if the user asks no response to repairing then deletes malfunctioning node automatically; And with notifying the user this deletion action simultaneously, the execution of next link of redirect then in malfunctioning node numbering and the daily record of failure cause write error; After the preparation of p loud speaker node and q microphone node has all finished; Central processing unit orders p loud speaker node to begin the play template signal; After template signal finishes the back and waits for fixed time length; Central processing unit will notify q microphone node to receive the integrity detection of data, and upload the examining report of data integrity to it;
D5. central processing unit carries out analysis and judgement to the data integrity examining report of uploading, if the determinating receiving data integrality is undesired, whether then continues to return c less than C
0
The judgement stage, carry out the broadcast of template signal by p loud speaker again; If the decision data integrality is normal, then return in the link that makes q increase by 1.
preferably; Central processing unit described in the steps d starts each wireless speaker node successively; In implementation procedure; Central processing unit need be checked the data integrity examining report that each microphone node is uploaded, and this examining report is actually a string specific code word, and this code word is to define code word according to the cross-correlation coefficient size that receives signal and template signal.For example; When cross-correlation coefficient greater than 0.78 the time, will export code word " 1110010011100100 ", show the information that contains template signal in the signal that receives; When cross-correlation coefficient less than 0.78 the time; To export code word " 0001101100011011 ", and show the information that does not contain template signal in the signal that receives, the length and the content of this string certain code word can define according to practical engineering application.In addition, in the process of this string certain code word of definition, can carry out more strict certain code word according to the matching degree of characteristic parameter such as the time domain waveform that receives signal and the frequency spectrum of frequency domain and template signal characteristic parameter and define.
Further, in the step 2, the roomage response information of each wireless speaker node that all radio microphone nodes will be gathered successively sends to central processing unit, realizes the flow process such as the accompanying drawing 5 of this roomage response information process of transmitting, may further comprise the steps:
E. central processing unit is provided with variable q and equals 0, and whether judgment variable q less than M, if variable q is not less than M, informs that then all microphone nodes of central processing unit have accomplished data and sent task, can carry out next link; If variable q less than M, then notifies q radio microphone node to upload the impulse response information based on template signal that this node is gathered to central processing unit;
Whether f. central processing unit will check whether the impulse response information of being sent by q microphone that is received is complete, if the response message that receives is complete, variable q is increased jump to after 1 q in the judgement link less than M; If the response message that receives is imperfect, variable c then is set equals 0;
G. whether central processing unit detection variable c is less than C
0
, C
0
Be that q radio microphone node uploaded the number of times of pretending to be response message of this node collection to central processing unit, if variable c is not less than C
0
Central processing unit will carry out failure diagnosis to q microphone node; And report user repairing, if the user will not reply the request of repairing, then central processing unit will be deleted q microphone node automatically; And the write error daily record notifies the user this deletion action simultaneously, jumps to the execution of next link then; If variable c is less than C
0
, then notify q radio microphone node to upload the response message that this node is gathered based on template signal to central processing unit;
H. central processing unit is checked q microphone information integrity that node is uploaded, if data message is imperfect, then still whether redirect returns c less than C
0
The judgement link in; If data message is complete, then jump in the link that makes variable q increase by 1.
further; In the step 2; The roomage response information of each wireless speaker node that all radio microphone nodes will be gathered successively sends to central processing unit, and the Frame encapsulating structure of the impulse response information that the microphone node is sent is shown in accompanying drawing 6.This Frame comprises the pairing loud speaker numbering of numbering, the impulse response of prefix code section, source address, destination address, data length, microphone, the impulse response data, the check code section that receive; Wherein the prefix code section is used to accomplish the clock synchronization of Frame and the equilibrium of channel; Source address representes to send the microphone node address number of Frame; Destination address is represented the central processing unit address number of receiving data frames, and data length is represented the length scale of Frame.The numbering of microphone representes to send the number information of the microphone node of Frame; The number information of the pairing loud speaker node of this impulse response data that the expression of the pairing loud speaker numbering of impulse response is to be sent; The impulse response information that the impulse response data that receives receives on microphone when representing by the loudspeaker plays template signal, the check code section is used to transmit the error coded check and the correction process of data.
preferably, in the step 3, central processing unit is carried out the balanced and sound field control algolithm of roomage response; And the parameter that calculates distributed to each loud speaker node; Wherein, balanced to the response that a plurality of location point in space is carried out, adopt the joint equalization device of time-space domain to realize.The parametric solution process of this time-space domain joint equalization device is following:
The number of assumed wireless loud speaker node is N, and the number of radio microphone node is M, supposes that the measured value of the time-domain pulse response sequence between p loud speaker node and q the microphone node is:
Wherein
Length for the time-domain response sequence.The measured value of the frequency domain response sequence between these two nodes can be expressed as so:
Wherein
Length for the frequency domain response sequence.The equalizer time-domain response sequence table of supposing p loud speaker node is shown:
Wherein
Length for equalizer time-domain response sequence.The equalizer time-domain response sequence table of supposing p loud speaker node is shown:
On q microphone node, the time-domain response sequence table after equilibrium treatment is shown:
So, the frequency domain response sequence after equilibrium treatment can be expressed as on q microphone node:
In the ideal case, after equilibrium treatment, the time-domain pulse response sequence of q microphone node should be Dirac delta function (Dirac Delta function), and then the solution formula of the response sequence of equalizer can be expressed as:
Wherein
Be the time domain sequences vector of Dirac delta function, its dimension is:
The time-domain response sequence solution formula of equalizer is transformed in the frequency domain and can obtains:
Wherein
For
The dimension element all is 1 column vector, and the equalizer response solution formula of all loud speaker nodes can be expressed as so:
Wherein
Be
On the frequency corresponding to the equalizer response estimated value of all loud speaker nodes,
Be the element sequence number of spectral sample sequence, its span is:
Be equalizer response sequence to be asked, its expression formula is:
more preferably; In the step 3; Central processing unit is carried out the balanced and sound field control algolithm of roomage response, and the parameter that calculates is distributed to each loud speaker node, wherein; To the sound field control that a plurality of location point in space is carried out, the employing criterion of least squares calculates employed multichannel weight vectors when carrying out sound field control.This solution procedure of weight vectors that is used for sound field control is following:
Suppose
The acoustic pressure distributing vector expression formula of the desired space M microphone node location of user is on the frequency:
Suppose
Being used on the frequency that N loudspeaker channel carried out sound field controls employed weight vectors expression formula and is:
According to criterion of least squares,
On the frequency, for the actual acoustic pressure that makes M the microphone node location acoustic pressure that reaches expectation that distributes distributes, need be on N loud speaker node passage the solution formula of the weight vectors that applies following:
Wherein
Be the weight vectors that is applied on N the loudspeaker channel,
It is the estimated value of weight vectors.
further; In the step 3; Central processing unit is carried out the balanced and sound field control algolithm of roomage response; And the parameter that calculates distributed to each loud speaker node; Shown in accompanying drawing 8, central processing unit successively according to start the loud speaker node, whether inspection starts finishes, the information speaker node prepares to receive parameter value, whether inspection ready, to integrality, the mute speaker node of the loud speaker node value of passing a parameter, inspection parameter value that node receives, check and close the execution that step such as whether finish is carried out the parameter transmission.Central processing unit to startup, preparation, parameter integrality and close the testing process of these four kinds of situation and detection method and flow process that step 1 and step 2 are adopted basic identical, and startup, preparation, parameter integrality and to close four kinds of various state code words that testing process transmitted also basic identical with step 1 and 2 defined code words.In addition; Head and afterbody that the detection of parameter integrality can be employed in parameter value data add the identification code section; After treating that the loud speaker node is received the Frame that comprises parameter value; To upload the head and the afterbody identification code section of parameter value data to central processing unit, whether central processing unit judges through the coupling of identification code section whether the loud speaker node has obtained complete parameter value data.
further, in the step 3, central processing unit is carried out the balanced and sound field control algolithm of roomage response, and the parameter that calculates is distributed to each loud speaker node; Shown in accompanying drawing 9, the Frame encapsulating structure of parameter value comprises prefix code section, source address; Destination address, data length, the first identification code section of section; The parameter value data that distributes, section tail identification code section, check code section.Sign indicating number section stem and afterbody at the parameter value data that distributes have added first identification code section of section and section tail mark code section respectively, are used for the reception integrity checking of parameter value data.
further; Central processing unit transmit balanced to the loud speaker node and parameter value process that the sound field control algolithm is found the solution in; Need to detect the startup situation of loud speaker node; This testing process that starts situation may further comprise the steps shown in accompanying drawing 10: central processing unit notifies p wireless speaker node to upload the state information that self starts situation to it, and central processing unit will be checked state information and judge whether starting state is normal then; If starting state is normal, then get into the execution of next link.If starting state is undesired, then central processing unit carries out the repeatedly start-up operation of repeatability with attempting, if in the process that repeatability starts, the wireless speaker node has been accomplished normal startup, then jumps to the next link of carrying out; If in repeated start-up course repeatedly, the wireless speaker node is still accomplished normal the startup, and then central processing unit will carry out failure diagnosis to this node, confirm failure cause, and notifies user's place under repair operation; If the user is to repairing the request no response, then central processing unit will be deleted p wireless speaker node automatically, and with malfunctioning node numbering and the daily record of failure cause write error, notify the user this deletion action simultaneously, and jumping to variable p then increases by 1 link; If the user responds the request of repairing, then close all nodes, show malfunctioning node numbering and reason, wait for that the user repairs.
Further; Central processing unit needs to detect the loud speaker node and whether has been ready to receive data before the parameter value of loud speaker node transfer algorithm output, and the testing process of this SBR is shown in accompanying drawing 11; May further comprise the steps: central processing unit notifies p wireless speaker node to upload the state information of preparation to it; Central processing unit is analyzed this state information then, and whether the decision node eligible task is accomplished, if node remains unfulfilled eligible task; Then whether central processing unit will be attempted repeating to send preparation instruction and detecting and prepare to accomplish according to the time interval of △ T, if at T
d
The time period interior nodes remains unfulfilled preparation, and then central processing unit will carry out failure diagnosis to node.
Further; Central processing unit is accomplished after the task of loud speaker node transfer algorithm output parameter value; Need to detect the loud speaker node and whether received complete parameter value data, the integrity detection process of these reception data may further comprise the steps shown in accompanying drawing 12: can not receive complete data if central processing unit detects the loud speaker node; The principle that will transmit according to repeatability repeatedly attempts carrying out C
0
Secondary data transmits, if in this repetition transport process, the loud speaker node still can not receive complete data message, and then central processing unit will carry out the failure diagnosis operation to this loud speaker node.
Further; Whether central processing unit will carry out shutoff operation to the electric power system of this loud speaker node, and detect this node and normally close detecting after the loud speaker node received complete parameter value data; The testing process of this node closed condition is shown in accompanying drawing 13; May further comprise the steps: central processing unit can send the closed condition query statement to node, does not reply if node is made, and thinks that then node closes; If node still can be replied the closed condition query statement, then central processing unit carries out C with trial
0
Inferior repeated shutoff operation, if after the repeated shutoff operation of these times, node still can't be closed, and then abandons it is carried out shutoff operation, and this can't be closed the daily record of situation write error also notify to the user simultaneously.
further, in the step 4, central processing unit starts all wireless speaker nodes and gets into operating states and play audio files; Wherein, Central processing unit starts all loud speaker nodes and gets into operating state, and after starting all loud speaker nodes, central processing unit detects and assesses algorithm performance; The concrete realization flow of this process may further comprise the steps shown in accompanying drawing 14; Central processing unit will start all microphone nodes; After all microphone nodes startups of detection finish; To notify all loud speaker nodes to prepare the play template signal notifies all microphone nodes to prepare to receive template signal simultaneously; After all nodes of detection are all ready, will order all loud speaker node play template signals; After all loud speaker nodes play template signal; Central processing unit will detect all microphone nodes and whether receive the complete response message based on template signal; After all microphone nodes have all received complete response message, central processing unit will order the response message of the template signal that all microphone nodes network transmission protocol according to the rules will receive successively to send to central processing unit; Whether central processing unit is complete with the response message that detection receives all microphone nodes; After receiving the complete response message of all nodes; Central processing unit will cut out the electric power system of all microphone nodes; Show the frequency response curve after each microphone position point place's equilibrium then, show the acoustic pressure distribution situation after each microphone position point carries out the sound field control and treatment simultaneously, and assessment response portfolio effect and sound field control effect; After showing preset time length, with jumping to the link of playing user's designated tone source file automatically.
further; In the process that central processing unit detects and assesses algorithm performance; Whether central processing unit need detect all microphone nodes and all start and finish; The realization flow and the state encoding definition that detect all microphone node starting states in the definition of the realization flow of all microphone node starting states of this detection and state encoding and the step 1 shown in Figure 2 are identical; In this testing process, central processing unit notifies each microphone node to upload the state information that self starts situation successively, does not accomplish startup if central processing unit determines certain node through state information; Then attempt repeatedly notifying this node startup and detect the method that it starts situation, in preset time length, can accomplish initiating task to guarantee this node according to designated time intervals.
further; In the process that central processing unit detects and assesses algorithm performance; Central processing unit need detect all loud speakers and whether accomplish the preparation before playing; Detect all microphone nodes simultaneously and whether all accomplished the preparation before receiving; It is identical that the definition of the realization flow of all loud speakers of this detection and microphone node preparation and the state encoding of preparation and step c in the step 1 detect the state encoding definition of realization flow and preparation of p loud speaker node and all microphone node preparations, and shown in accompanying drawing 15, central processing unit is the preparation of M microphone node of detection earlier; And then the preparation of N loud speaker node of detection; If do not accomplish when preparing detecting node, then in preset time length, repeatedly repeat to notify this node to play or receive preparation, and detect its preparation according to certain time interval.
further; In the process that central processing unit detects and assesses algorithm performance; Central processing unit need detect the integrality that all microphone nodes receive data; The definition format of microphone node data integrity detection flow process and Frame is basic identical in the testing process of this reception data integrity and the definition format of Frame and the step 1; Accompanying drawing 16 has provided the testing process of data integrity, and central processing unit receives data integrity to each microphone node successively and detects, if certain node does not receive complete data message; Then central processing unit will be given up the data message of this node; And with the wrong write error daily record that this node occurred, it is imperfect in follow-up display operation, will to point out this node location to receive information then, can not participate in the algorithm effects assessment.
further; In the step 4; Central processing unit starts all loud speaker nodes and gets into operating state, and after starting all loud speaker nodes, central processing unit can detect and assess algorithm performance; In the process that algorithm performance is detected and assesses; Central processing unit need notify all microphone nodes to upload the template signal response message that is received to it, and shown in accompanying drawing 5, the response message upload procedure of all microphone nodes is identical described in the response message upload procedure of all microphone nodes and the step 2.
further; In the step 4; Central processing unit starts all loud speaker nodes and gets into operating state, and after starting all loud speaker nodes, central processing unit can detect and assess algorithm performance; Central processing unit is after the complete response information that receives all microphones transmissions; To close all radio microphone nodes, shown in accompanying drawing 17, the pass closed procedure of all microphone nodes is identical described in this pass closed procedure and the step 2; Central processing unit will cut out the electric power system of each microphone node successively, and detect the microphone node and whether make the mode of replying and judge whether this node is accomplished and close through sending query statement; Whether if node is not accomplished and closed, then central processing unit will repeat repeatedly shutoff operation, and check to accomplish and close.
further, in the step 4, central processing unit starts all wireless speaker nodes and gets into operating states and play audio files; Shown in accompanying drawing 18; Central processing unit at first notifies all loud speaker nodes to prepare to play audio files, checks the preparation of each loud speaker node then, after all nodes are all ready; Order all loud speaker nodes to play audio files, whether still have playing task according at interval continuous detection of fixed time then; If still have playing task, then continue to keep a plurality of loud speaker nodes to carry out playing task, keep to detect whether still have playing task simultaneously; If there is not playing task, then central processing unit will cut out the electric power system of all loud speaker nodes, and self also gets into the dormancy holding state.
further; Before playing audio files; Central processing unit need notify all loud speakers to prepare to play and detect its preparation, and the preparation testing process of all loud speaker nodes is identical in the testing process of this preparation and the detection of algorithm performance and the evaluation process.Shown in accompanying drawing 19; Central processing unit notifies each loud speaker node to prepare to play audio files; Whether detect each loud speaker node then all is ready to; If certain node is not ready as yet, then repeatedly repeats to notify this node to play at interval and prepare and detect its preparation situation by certain hour.
preferably; In step 1 and the step 4, all wireless speaker nodes can be according to practical application request; Form the array of different shape, also can take separate mode to lay according to the application demand of special sound effects such as 3 D stereo surround sound.
more preferably, in the step 2, all radio microphone nodes can be confirmed the position that lays of microphone node according to expectation listening area and practical application request.If under the situation cheap at microphone node itself, that volume is small, also can consider the mode that lays at random of multiposition point.
more preferably; In step 1 to the step 4, the aerial array of central processing unit can adopt omni directional radiation pattern to carry out information broadcast, sends data message to all nodes; Also can adjust its beam direction, send information to local some node.All wireless speaker nodes except and central processing unit between carry out the information interaction, also can carry out information interaction between these loud speaker nodes, the antenna of these loud speaker nodes can omnidirectional radiation also can carry out radiation to the local space angle.Equally, all radio microphone nodes except and central processing unit between carry out the information interaction, also can carry out information interaction between these microphone nodes, the antenna of these microphones can omnidirectional radiation also can be adjusted to local angle and carry out radiation.
Another program provided by the present invention is: based on the equilibrium of loudspeaker array roomage response and the sound field controlling device of cordless communication network, shown in accompanying drawing 20, it comprises
Be used to collect the impulse response information of all expectation LisPos points; And be used for equilibrium treatment is carried out in the response of desired locations point; Be used for simultaneously the sound field of desired locations point is controlled to reach special sound field distributed needs, also be used for to all wireless speakers and microphone node manage, the central processing unit of the processing of scheduling, operation conditions monitoring and failure diagnosis and case of emergency;
Be used to expect the reception and the storage of the impulse response of LisPos point, and be used for that a plurality of radio microphone nodes are connected through cordless communication network with central processing unit with receiving a plurality of radio microphone nodes that response message is sent to central processing unit;
are used to play the template signal of impulse response test period; Be used for playing between the normal operating period audio files of user's appointment simultaneously; Also be used for and central processing unit between carry out a plurality of wireless speaker nodes of information interaction, a plurality of wireless speaker nodes are connected through cordless communication network with central processing unit.
further; The radio microphone node is made up of first antenna, first wireless communication module, first data access module, first signal processing module, first controller module, the first buffering amplification module, microphone and powered battery module, shown in accompanying drawing 21.First antenna is used to transmit and receive the radio magnetic wave signal, can be the aerial array of individual antenna unit or a plurality of antenna element composition.First wireless communication module is used for data to be launched are encoded and modulation treatment, is used for that perhaps the signal that has received is carried out the demodulation sign indicating number and handles; First data access module carries out buffer memory to the data in emission or reception and the signal processing module, guarantees the security reliability in the data transmission procedure, also effectively improves the travelling speed of processor simultaneously; First signal processing module be used for to receive or signal to be transmitted carry out processing such as data analysis, filtering and noise reduction and channel equalization; Provide the elementary identification of data internal information; Extract some state informations in the data message about the node operation conditions, about the number information of node or central processing unit and data size information etc.; Simultaneously also be used for the radiation beam of aerial array is carried out weighting control the spatial emission or the receive direction of adjustment aerial array; First controller module is used for management and scheduling wireless communications module, data access module, signal processing module, buffering amplification module and powered battery module; The operation conditions of these modules is monitored and the collaborative work of these intermodules is optimized processing, simultaneously fault and caused accident that these modules occurred are in time handled; The first buffering amplification module is used for the signal that microphone is sent into is cushioned and processing and amplifying; Microphone is used for the sound pressure signal of locus point is carried out measurement of inductance, and microphone can be the microphone array of single microphone unit or a plurality of microphone unit composition; The powered battery module is carried out supply of electric power to all modules of whole node, and the startup, dormancy and the out code that can response controller provide.
further, central processing unit is made up of a plurality of sub-processor modules, CPU module and first power supply module, and is shown in figure 22.Central processing unit is divided into several space partition zones with whole area of space; And all radio microphone nodes that will be in the same space partition zone are formed a grouping with all wireless speaker nodes; Communication task and information handling task by all nodes and central processing unit in formed each grouping of space partition zone will be responsible for by the sub-processor module of a distribution; Sub-processor module 12 will be responsible for carrying out the data communication of interior all the microphone nodes that comprised of designated space subregion and loudspeaker node and central processing unit and the information content of Frame will be analyzed identification and primary signal processing operation, and the sub-processor module also can be controlled the directive property of aerial array radiation beam in addition; CPU module is responsible for the examining report that a plurality of sub-processor modules are sent here is analyzed and adjudicated; And based on these court verdicts execution corresponding process operations; CPU module also to all sub-processor modules manage, the emergency processing of scheduling, monitoring running state, fault diagnosis and accident; In addition, CPU module also is responsible for carrying out executing the task of some space multiposition point response equalization algorithms and sound field control algolithm; First power supply module is responsible for all modules of central processing unit are supplied power, and first power supply module can use civil power or powered battery, and this module can respond startup, dormancy and the out code that central controller sends and carry out corresponding action.
further, the sub-processor module comprises second antenna, radio communication submodule, signal processing submodule, data access submodule, controller submodule, shown in accompanying drawing 22.Second antenna is used to transmit and receive the radio magnetic wave signal, can be the aerial array of individual antenna unit or a plurality of antenna element composition; The radio communication submodule will carry out the demodulation code operations to the signal of receiving from these nodes in receiving course, in process of transmitting, will encode and modulation operations to sent signal; Data cached in data to be launched that reception data that the data access submodule is sent here the radio communication submodule and signal processing submodule are sent here and the signal processing preserve in real time, guaranteed data transmit and processing procedure in security reliability; The signal processing submodule is responsible for the data frame content that receives is analyzed and identification; Form the report information that some comprise contents such as communication node identity, communication data frame length, communication node running status; And sending these information to CPU module, the signal processing submodule also is responsible for data to be launched are carried out processing such as filtering, channel equalization; In addition, the signal processing submodule also is responsible for the directive property control to aerial array space radiation wave beam; The controller submodule is responsible for the emergency processing to management, scheduling, operation conditions monitoring, failure diagnosis and the accident of radio communication submodule, data access submodule, signal processing submodule.
further, CPU module comprises central controller, central signal processor, central data memory access, shown in accompanying drawing 22.Central controller and all controller submodule are interconnected; Can assign control command to all controller submodules; Accomplishing the expectant control task, central controller also be responsible for to central signal processor, central data memory access and first power supply module manage, the processing of scheduling, operation conditions monitoring, failure diagnosis and case of emergency; Central signal processor and all signal processing submodules are interconnected, can receive the information after all signal processing submodules are handled, and the central signal processor is responsible for the derivation task of roomage response equalization algorithm and sound field control algolithm; Central data memory access and all data access submodules are interconnected; The central data memory access can read to receive data from the data access submodule; Perhaps in the data access submodule, write data; The central data memory access is responsible for the intermediate variable data that central signal processor is produced in calculating process are in time preserved; And the command information of central controller in time preserved, the audio files that some parameters that the central data memory access also is responsible for the user is provided with and user browsed writes down and backs up.
further; The wireless speaker node comprises third antenna, second wireless communication module, second data access module, secondary signal processing module, the second buffering amplification module, power amplifier module, second source supply module, second controller module, shown in accompanying drawing 23.Third antenna is used to transmit and receive the radio magnetic wave signal, can be the aerial array of individual antenna unit or a plurality of antenna element composition; Second wireless communication module is used for modulation and coding-decoding operation; The preservation of intermediate variable during buffer memory and the signal processing that second data access module is used for data transmission procedure handled; Parametric equalizer that the secondary signal processing module will be sent here according to central processing unit and sound field Control Parameter are treated the output signal and are carried out equilibrium and amplitude-phase adjustment, control effect to obtain response equilibrium and sound field; Second controller module is responsible for second wireless communication module, second data access module, secondary signal processing module, second buffering amplification module, the power amplifier module and the second source supply module is managed, the emergency processing of scheduling, operation conditions monitoring, failure diagnosis and accident; The second buffering amplification module is responsible for the output signal is cushioned and processing and amplifying; Power amplifier module is responsible for small-signal is carried out power amplification, to drive the loud speaker sounding; Loud speaker is used for electroacoustic conversion, thereby is that air vibration produces voice signal with the power electrical signal conversion, and raising one's voice 0 can also can be the loudspeaker array that a plurality of loudspeaker units are formed for single loudspeaker unit; The second source supply module is used for whole node is carried out supply of electric power, and power supply can adopt civil power or battery to supply power, and the second source supply module can respond startup, dormancy and the out code of central processing unit transmission and carry out corresponding action.
preferably, connected mode is not limited to cordless communication network between central processing unit and microphone node or the loud speaker node, also can adopt the wired connection mode to carry out the mutual of information.
described loudspeaker array roomage response of the present invention balanced and sound field control method and device based on cordless communication network; Through cordless communication network the impulse response information of a plurality of location points in space place microphone node measurement is uploaded to the central processing unit end automatically; And the response message of these space multiposition points is applied in the parameter Estimation of the balanced and sound field control algolithm of roomage response; The estimated accuracy and the algorithm performance of parameter have been improved; Solve traditional manual measurement method and obtained the existing complexity of space impulse response function; Make that space application balanced and the sound field control algolithm is more easy flexibly, also improved the intellectuality and the networked level of sound-reproducing system.
Compared with prior art, the invention has the advantages that:
Response message is also uploaded to central processing unit automatically through automatic collection of a plurality of radio microphone nodes in cordless communication network control space and storage pulse response data in
1. the present invention; Thereby the automatic measurement and the collection work of space multiposition point impulse response information have been realized; Avoided traditional and obtained existing big workload of impulse response method and implementation complexity based on manual measurement; Improve the performance level of space equilibrium and sound field control algolithm, also improved the convenient degree of flexibility of algorithm application simultaneously.
the present invention has the work of wireless speaker node through central processing unit management and dispatching office; And monitor the operation conditions of these loud speaker nodes in real time; Emergency processing is carried out in accident to these nodes occurred, thereby has improved the intellectuality and the networked level of sound-reproducing system.
It uploads the sound pressure signal data that gather in self-position point place from trend through the radio microphone node that central processing unit is controlled some place, a plurality of locus in
the present invention; Thereby can balancedly in the space handle the treatment effect of these algorithms of online evaluation afterwards with the sound field control algolithm; Can demonstrate the acoustic pressure distribution curve after response curve and the control after a plurality of location points place's equilibrium of space automatically, thereby realize the line dynamic assessment of various algorithm performances with simple and efficient mode.
the present invention can automatically perform the measurement and the collection of roomage response according to the online evaluation result of the changing condition of loud speaker node surrounding environment of living in and algorithm performance; And accomplish automatically according to pre-defined algorithm that roomage response is balanced to be controlled with sound field; Thereby realized the adaptive control of roomage response harmony field distribution, improved the intelligent level of algorithm.
the present invention can be according to playing the frequency band attribute that audio files had; Automatically adjust the work frequency response bandwidth of loud speaker node; Thereby guaranteed that system's frequency response bandwidth cooperates with the effective of audio files bandwidth, thereby guaranteed the tonequality level of sound-reproducing system.
the present invention can carry out the optimal design of space sound field adaptively according to auditor's location in space, has improved the spatial sound radiation efficiency of loud speaker node, has improved the service efficiency of system.
the present invention can manage unlatching, dormancy and the shutoff operation of all microphones and loud speaker node automatically through central processing unit, has saved the power consumption of system.
the present invention can be in the space a plurality of location points are a large amount of arranges this cheap, microphone node that volume is small, thereby realize accurate Calculation and control that sound field in the whole area of space is distributed.
Description of drawings
Fig. 1 is based on the loudspeaker array roomage response equilibrium of cordless communication network and the signal processing flow figure of sound field control method and device according to according to the present invention;
Fig. 2 is central processing unit starts situation to all radio microphone nodes testing process figure;
Fig. 3 is a central processing unit to the testing process figure of the reception preparation of the broadcast preparation of p wireless speaker node and all radio microphone nodes;
Fig. 4 is central processing unit receives response message to all radio microphone nodes an integrity detection flow chart;
Fig. 5 is all radio microphone nodes send realization flow figure from the response message that self receives to central processing unit;
Fig. 6 is the Frame encapsulating structure sketch map of the microphone node impulse response information of being sent;
To be central processing unit close the testing process figure of situation to all microphone nodes and N-1 loud speaker node power supply to Fig. 7;
Fig. 8 is the process chart that each loud speaker node distributed to the algorithm parameter value by central processing unit;
Employed Frame encapsulating structure sketch map when Fig. 9 is the central processing unit value of passing a parameter;
Figure 10 is that central processing unit detects the process chart that each wireless speaker node starts situation;
Figure 11 is the process chart that central processing unit detects each wireless speaker node preparation;
Figure 12 is the process chart that central processing unit detects each loud speaker node receiving algorithm parameter value data integrality;
Figure 13 is that central processing unit detects the process chart that each loud speaker node electric power system is closed situation;
Figure 14 is central processing unit carries out online detection and assessment to algorithm performance realization flow figure;
Figure 15 be in the evaluation of algorithm process central processing unit to the testing process figure of all loud speakers and microphone node preparation;
Figure 16 is that central processing unit detects the process chart that all microphone nodes receive data integrity in the evaluation of algorithm process;
Figure 17 is central processing unit cuts out situation to all microphone node electric power systems testing process figure;
Figure 18 is the playing flow figure that central processing unit is carried out user's designated tone source file;
Figure 19 is the process chart that central processing unit detects all wireless speaker node preparations;
Figure 20 is that the loudspeaker array roomage response equilibrium based on cordless communication network of the present invention is respectively formed module diagram with sound field controlling device;
Figure 21 be the radio microphone node respectively form module diagram;
Figure 22 be central processing unit respectively form module diagram;
Figure 23 be the wireless speaker node respectively form module diagram;
Figure 24 is that the array element of eight yuan of linear arrays in the embodiment of the invention 1 lays position view;
Figure 25 be in the embodiment of the invention 1 wireless speaker node and radio microphone node lay position view;
Figure 26 is the equalizer frequency response curve figure that is applied on each loud speaker node passage in the embodiment of the invention 1;
Figure 27 applies front and back, the comparison diagram of microphone position point place frequency response curve at equalizer in the embodiment of the invention 1;
Figure 28 is that the position of wireless speaker node in the embodiment of the invention 2 lays figure;
Figure 29 is that the position of radio microphone node in the embodiment of the invention 2 lays figure;
Figure 30 be in the embodiment of the invention 2 in the rectangular room position of loud speaker face array and microphone face array lay figure;
Figure 31 be in the embodiment of the invention 2 after 1 KHz Frequency point place sound field control and treatment the acoustic pressure distribution map;
Figure 32 be in the embodiment of the invention 2 after 2KHz Frequency point place sound field control and treatment the acoustic pressure distribution map;
Figure 33 be in the embodiment of the invention 2 after 3KHz Frequency point place sound field control and treatment the acoustic pressure distribution map;
Figure 34 be in the embodiment of the invention 2 after 4KHz Frequency point place sound field control and treatment the acoustic pressure distribution map;
Figure 35 be in the embodiment of the invention 2 after 5KHz Frequency point place sound field control and treatment the acoustic pressure distribution map.
Wherein label is among the figure:
1, radio microphone node; 2, central processing unit; 3, wireless speaker node; 4, first antenna; 5, first wireless communication module; 6, first data access module; 7, first signal processing module; 8, first controller module; 9, the first buffering amplification module; 10, microphone; 11, powered battery module; 12, sub-processor module; 13, CPU module; 14, central controller; 15, central signal processor; 16, central data memory access; 17, first power supply module; 18, second antenna; 19, radio communication submodule; 20, data access submodule; 21, signal processing submodule; 22, controller submodule; 23, third antenna; 24, second wireless communication module; 25, second data access module; 26, secondary signal processing module; 27, second controller module; 28, the second buffering amplification module; 29, power amplifier module; 30, loud speaker; 31, second source supply module.
Embodiment
Set forth preferred embodiment of the present invention below in conjunction with accompanying drawing in detail
, thereby so that advantage of the present invention and characteristic can be easier to it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
Embodiment one
the present invention at first passes through the radio microphone node of each location point of space; Automatically measure impulse response and upload to central processing unit through cordless communication network; Central processing unit utilizes the frequency response measurement data of these each location points of space; Carry out space each location point response equalization algorithm and sound field control algolithm; Parameter value with equalization algorithm and the estimation of sound field control algolithm downloads to all wireless speaker nodes then, and carries out the balanced and amplitude-phase adjustment processing of frequency response through the signal processing module on the wireless speaker node, thereby has realized the balanced and sound field control and treatment of response of the space multiposition point of loudspeaker array.In addition; After accomplishing the algorithm process that the space is balanced and sound field is controlled; The radio microphone unit that central processing unit can be controlled a plurality of location points sends the acoustic pressure data that gather at location point place separately to it, according to the acoustic pressure data at these location point places can display algorithm implementation effect.Under the situation that surrounding environment changes or the algorithm implementation effect seriously reduces, central processing unit will automatically perform measurement, collection and the optimization Algorithm of roomage response and handle.
are shown in figure 20; Make foundation an equilibrium of loudspeaker array roomage response and a sound field controlling device based on cordless communication network of the present invention, its main body is made up of a plurality of radio microphone node 1, central processing unit 2, a plurality of wireless speaker node 3.A plurality of radio microphone nodes 1 and said central processing unit 2 are connected through cordless communication network alternately, are used to measure the voice signal of self present position point, and upload to central processing unit 2 through cordless communication network.Central processing unit 2 and radio microphone node 1 and wireless speaker node 3 are connected through cordless communication network alternately, are used to manage, dispatch the task of all nodes and monitor all nodes and the operation conditions of self and in time handle the various accidents that whole system occurred.In addition, central processing unit 2 also be used for a plurality of location points of running space response equalization algorithm and space sound field control algolithm solution procedure and export the estimated parameter of these algorithms.Wireless speaker node 3 and central processing unit 2 are connected through cordless communication network alternately; Be used to receive data messages such as control command that central processing unit 2 sends, algorithm parameter information, user's designated tone source file, and upload the running state information of self to central processing unit 2.The wireless speaker node 3 algorithm estimated parameter value that can provide according to central processing unit 2 is carried out equilibrium to the loud speaker output channel of self and is adjusted mutually with the width of cloth in addition, guarantees the validity of the balanced and sound field control algolithm of roomage response.
are shown in figure 21, and radio microphone node 1 is made up of first antenna 4, first wireless communication module 5, first data access module 6, first signal processing module 7, first controller module 8, the first buffering amplification module 9, microphone 10 and powered battery module 11.Shown in figure 22, central processing unit 2 is made up of sub-processor module 12, CPU module 13 and first power supply module 17.Sub-processor module 12 is made up of second antenna 18, radio communication submodule 19, data access submodule 20, signal processing submodule 21, controller submodule 22.CPU module 13 is made up of central controller 14, central signal processor 15 and central data memory access 16.Shown in figure 23, wireless speaker node 3 is made up of third antenna 23, second wireless communication module 24, second data access module 25, secondary signal processing module 26, second controller module 27, the second buffering amplification module 28, power amplifier module 29, loud speaker 30 and second source supply module 31.
In
present embodiment; Loudspeaker array adopts 8 yuan of linear arraies; Wherein the model of loudspeaker unit employing Hui Wei company production is the full range speaker unit of B2S, and the frequency band range of this unit is 270 Hz～20 KHz, and sensitivity (2.83V/1m) is 79 dB; Maximum power is 2 W, and rated impedance is 8 ohm.Shown in figure 24, the array element distance l of linear loudspeaker array 1 Be 4 cm, each loudspeaker unit is installed on the wireless speaker node.
In the space, laying of assumed wireless loud speaker node and radio microphone node is shown in figure 25, L
1
Distance is 1 meter, L
2
Distance is 1 meter.The template signal that assumed wireless loud speaker node is play is the swept-frequency signal of 100 Hz～20 KHz for the incoming frequency scope, and 1 meter distant positions point place is responsible for receiving the response data that each loud speaker node 3 play template signal is produced by a radio microphone node 1 on the loudspeaker array axis.Figure 26 has provided the equalizer frequency response curve figure that is applied on each loud speaker node passage, and Figure 27 has provided before and after equalizer applies, the comparison diagram of microphone position point place frequency response curve.When not applying equalizer; Radio microphone node location place space frequency response curve exists very significantly downward trend in the frequency range of 2 KHz～20 KHz; Along with frequency is increased to 20 KHz from 2 KHz; The amplitude spectrum of system's frequency response drops to 45 dB from 65 dB, exists the amplitude difference of 20 dB; After applying equalizer; The response curve at radio microphone node location place maintains near 57 dB in the frequency range of 2 KHz～20 KHz always; Demonstrate very smooth spectral characteristic, thereby guaranteed that loudspeaker array can guarantee the true reduction of sound source signal at microphone node present position Dian Chu.Adopt method and apparatus proposed by the invention, the impulse response information of obtaining each locus point that can be simple and efficient, and can guarantee to obtain on the microphone node location portfolio effect preferably based on the equalizer that these impulse response information are designed.
Embodiment two
In the present embodiment, suppose in rectangular room, to place a rounded face array that comprises 25 wireless speaker nodes, the wireless speaker node location on this face array lays shown in figure 28, apart from l
2
Be 0.15 meter, angle [alpha] is 45 °, apart from l
3
And l
4
Be 0.4 meter.Placing 6 row * 6 row facing array of 36 radio microphone nodes altogether apart from 2 meters distant places of loud speaker face array axis according to 0.4 meter interval, the radio microphone node location on this face array lays shown in figure 29, and plane M is a measurement plane.The position of loud speaker face array and microphone face array lays shown in figure 30 in rectangular room.The length of supposing the room is respectively 3 m, 4.5 m, 6 m, and wherein the three-dimensional coordinate of 25 yuan of loud speaker face array center's points is (1.5 m, 2.25 m, 1.5 m), and the three-dimensional coordinate of 36 yuan of microphone array central points is (1.5 m, 2.25 m, 3.5 m).Suppose that the scope that expectation focuses on is being the center of circle with (1.5 m, 2.25 m, 3.5 m), radius is in the border circular areas of 0.15 m.
suppose that frequency input signal is respectively: 1 KHz, 2 KHz, 3 KHz, 4 KHz and 5 KHz; After handling according to space sound field control algolithm, the space acoustic pressure corresponding to these Frequency points in the residing plane domain of microphone array distributes like Figure 31, Figure 32, Figure 33, Figure 34 and shown in Figure 35.Observe these acoustic pressure distribution maps, can find out in the center point peripheral region of (1.5 m, 2.25 m, 3.5 m), to have formed bright focused spot, shown the validity of sound field control algolithm.Along with the increase of frequency, the acoustic energy of diffusion reduces gradually in other zones on every side, and the effect of sound field focusing improves gradually.Thisly carry out the measurement and the collection method of roomage response, can in area of space, arrange this cheap, microphone node that volume is small in a large number, thereby realize accurate control the space sound field based on the radio microphone node.
the foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences of doing based on spirit of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (28)
1. response equilibrium of loudspeaker array spatial domain and sound field control method based on a cordless communication network comprise the steps:
(1) central processing unit starts each wireless speaker node play template signal successively;
(2) the roomage response information of each the wireless speaker node that will gather successively of all radio microphone nodes sends to central processing unit;
(3) central processing unit is carried out the balanced and sound field control algolithm of roomage response, and the parameter that calculates is distributed to each loud speaker node;
(4) central processing unit starts all wireless speaker nodes entering operating states broadcast audio files.
2. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 1; It is characterized in that: in the described step 1; Central processing unit starts each wireless speaker node successively; After central processing unit receives the instruction that roomage response is balanced or sound field is controlled, carry out the measuring task of space impulse response, realize that the flow process of this space impulse response measurement task may further comprise the steps starting all radio microphone nodes:
A. central processing unit starts all radio microphone nodes; And detect all microphone nodes and whether normally start; If there is certain node to occur normally to start situation, then reports, and enter into the handling process of abnormal conditions to central processing unit; If all nodes all normally start, then get into next link;
B. central processing unit will be provided with variable p and equal 0; And whether detection variable p less than N, and wherein N is the quantity of loud speaker node, if variable p is not less than N; Then close all microphone nodes and N-1 loud speaker node, enter into finding the solution the stage of space equilibrium and sound field control algolithm; If < N notifies p wireless speaker node to prepare to play to variable p, notifies all radio microphone nodes to prepare to receive simultaneously;
C. whether the preparation of central processing unit all microphone nodes of detection and P wireless speaker node has finished; If certain node remains unfulfilled preparation; Central processing unit will be taked corresponding special processing to this node of not accomplishing preparation; If the preparation of all microphone nodes and p wireless speaker node has all finished; Then order p wireless speaker node to begin the play template signal, in the process of p loud speaker node play template signal, all microphone nodes receive by template signal at the different spatial positions point and encourage the response message that produces;
D. whether central processing unit to detect the response message that all radio microphone nodes receive complete; If certain microphone node does not receive complete corresponding information; Central processing unit then carries out the particular processing flow process to this microphone node; If all microphone nodes have all received complete impulse response information, then close P wireless speaker node and make P increase by 1 back and get into detection variable p whether less than the link of N.
3. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 2; It is characterized in that: among the described step a; Whether central processing unit need detect all radio microphone nodes and all normally start, and realizes that the flow process of this detection may further comprise the steps:
A1. central processing unit is provided with variable q and equals 0; Whether detection variable q is less than M then; M is the quantity of radio microphone node; If variable q is not less than M, inform that then the inspection of all microphone nodes startup situation of central processing unit finishes, central processing unit can enter into the execution of next link; If < M then notifies q radio microphone node to upload the state information that self starts situation to central processing unit to variable q;
A2. central processing unit is checked judgement to the state information that q radio microphone node starts situation, if it is normal to be checked through the state information of this microphone node startup situation, then central processing unit will increase by 1 to variable q, continue to jump to q<the detection link of M; If it is undesired to be checked through the state information of this microphone node startup situation, then central processing unit will be attempted repeating to send enabled instruction and notifying it to upload the state information of startup situation according to the time interval of △ T to q radio microphone node; If at T
dThe state information of this node startup situation is normal in time period, then jumps to the link to variable q increase by 1, if at T
dThe state information of this microphone node startup situation is still undesired in time period; Then this node is carried out failure diagnosis; Confirm its failure cause and inform user's place under repair, if the user then closes all nodes to repairing request-reply; Show malfunctioning node numbering and failure cause, wait for that the user repairs; If the user then deletes this node automatically to repairing the request no response, and with malfunctioning node numbering and the daily record of failure cause write error, and notify the user this deletion action, and then jump to link to variable q increase by 1.
4. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 2; It is characterized in that: among the described step b; If variable p is not less than N, then close all microphone nodes and N-1 loud speaker node, enter into finding the solution the stage of space equilibrium and sound field control algolithm; Central processing unit need detect all microphone nodes and whether N-1 loud speaker node has all closed, and realizes that the flow process of this testing process may further comprise the steps:
B1. central processing unit is provided with variable q and equals 0, and whether detection variable q is less than M, and M is the quantity of radio microphone node, if variable q is not less than M, then central processing unit sends the instruction of cutting out N-1 wireless speaker node electric power system; If variable q is less than M, then central processing unit sends the instruction of cutting out q radio microphone node electric power system;
B2. central processing unit checks whether the electric power system of q radio microphone node closes, if the electric power system of q node has been closed, then makes variable q increase by 1 and continues to jump to variable q whether less than the judgement link of M; If the electric power system of q node is not closed yet, variable c then is set equals 0;
B3. whether central processing unit detection variable c is less than C
0, C
0For the number of times that q radio microphone node electric power system instructed is closed in transmission, if variable c is not less than C
0, then central processing unit will can't cut out the diagnosing malfunction analysis of electric power system to q radio microphone node, confirm its reason, and inform user's place under repair operation; If user answer should be repaired request, then central processing unit will cut out all loud speakers and microphone node, show the numbering and the failure cause of malfunctioning node, wait for that the user repairs; If user's dont answer is repaired request; Then central processing unit is abandoned the shutoff operation of q radio microphone node; And the fault write error daily record that this can't be closed informed this operation of abandoning closing of user simultaneously, jump to the execution of next link then; If variable c is less than C
0, then central processing unit continues to send the instruction of cutting out q microphone node electric power system, checks then whether its electric power system closes, if close, then jumps to the link that makes variable q increase by 1, if do not close yet, whether then jumps to c less than C
0The judgement link, attempt to continue send out code;
B4. when variable q is not less than M; Central processing unit gets into the flow process of cutting out N-1 wireless speaker node; Central processing unit sends out code to N-1 wireless speaker, checks then whether the electric power system of this node closes, if the electric power system of this node is closed; The task of closing of then informing all nodes of central processing unit is finished, and can get in the execution of next link; If the electric power system of this node is not closed yet, then the implementation with q radio microphone node is identical, attempts repeatedly sending the operation of out code, if still can not close, then gets into the failure diagnosis link.
5. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 2; It is characterized in that: among the described step c; Whether the broadcast preparation that central processing unit need detect p wireless speaker node is ready with the reception preparation of all radio microphone nodes, realizes that the flow process of this detection may further comprise the steps:
C1. central processing unit is provided with variable q and equals 0, and whether detection variable q less than M, and M is the quantity of radio microphone node, if q is not less than M, the preparation that then gets into p wireless speaker unit detects link; If q less than M, then notifies q radio microphone node to upload the state information of self preparation to central processing unit;
C2. central processing unit will check whether the state information of q radio microphone node preparation is normal, if the state information of this node preparation is normal, then make variable q increase by 1, continue to carry out q whether less than the judgement of M; If the state information of this node preparation is undesired, variable t then is set equals 0;
C3. whether central processing unit detection variable t is less than T
dIf variable t is less than T
d, then central processing unit continues to notify q radio microphone node to prepare to receive and upload the state information of preparation to it;
C4. whether q the radio microphone node in central processing unit inspection ground to upload the state information of self preparation normal; If state information is normal, then make variable q increase by 1, if state information is still undesired; Then make variable t increase △ T, whether continue to get into t less than T
dThe judgement stage;
If c5. variable t is not less than T
d, then central processing unit will carry out failure diagnosis to q radio microphone node, confirm its failure cause and report user's place under repair operation; Then whether central processing unit will detect the user and repair operation replied; Reply if the user makes, then close all microphone nodes and loud speaker node, show the numbering and the failure cause of malfunctioning node; Wait for user's place under repair; Do not reply if the user makes, then central processing unit will be in network q radio microphone node having broken down of deletion automatically, and be written to error log with malfunctioning node numbering and failure cause and to the deletion action of this malfunctioning node; Inform this deletion action of user simultaneously, and then jump to link variable q increase by 1;
C6. when variable q is not less than M; Central processing unit has promptly been accomplished the detection of situation that all microphone nodes are prepared; Change the detection-phase of situation that p wireless speaker node prepared over to, at first notify p wireless speaker node to upload the state information of preparation to central processing unit;
C7. central processing unit checks whether the state information of p wireless speaker node preparation is normal; If the state information of this node preparation is normal; The inspection of then informing all node preparations of central processing unit finishes, and can carry out next link; If the state information of this node preparation is undesired, variable t then is set equals 0;
C8. whether central processing unit detection variable t is less than T
dIf variable t is less than T
d, then central processing unit continues to notify p wireless speaker node to prepare to play and upload the state information of preparation to it;
C9. whether p the wireless speaker node in central processing unit inspection ground to upload the state information of self preparation normal; If state information is normal; The inspection of then informing all node preparations of central processing unit finishes, and can carry out next link, if state information is still undesired; Then make variable t increase △ T, whether continue to get into t less than T
dThe judgement stage;
If c10. variable t is not less than T
d, then central processing unit will carry out failure diagnosis to P wireless speaker node, confirm its failure cause and report user's place under repair operation; Then whether central processing unit will detect the user and repair operation replied, and reply if the user makes, and then close all microphone nodes and loud speaker node; The numbering and the failure cause that show malfunctioning node; Wait for user's place under repair, do not reply if the user makes, then central processing unit will be in network p wireless speaker node having broken down of deletion automatically; And be written to error log with malfunctioning node numbering and failure cause and to the deletion action of this malfunctioning node; Inform this deletion action of user simultaneously, and then inform that the inspection of the said node preparation of central processing unit finishes, and can carry out next link.
6. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 2; It is characterized in that: in the described steps d; Whether the response message that all radio microphone nodes of central processing unit detection receive is complete, and the flow process of this detection may further comprise the steps:
D1. central processing unit is provided with variable q and equals 0; Whether detection variable q is less than M, and M is the quantity of radio microphone node, if variable q is not less than M; Inform that then the data integrity inspection of all microphone nodes of central processing unit accomplishes, can get into the execution of next link; If variable q less than M, then notifies q radio microphone node to carry out the integrity detection of data, and uploads the examining report of data integrity to central processing unit;
D2. the data integrity examining report uploaded of central processing unit inspection microphone node if check result is normal, then makes variable q increase by 1, continues to jump to variable q whether less than the judgement link of M; If check result is undesired, variable c then is set equals 0;
D3. whether central processing unit detection variable c is less than C
0, C
0Be the number of times of p wireless speaker node repeat play template signal, if c is not less than C
0, then central processing unit will carry out failure diagnosis to q radio microphone node, confirm failure cause and report the user place under repair; Then central processing unit will detect the user whether repair operation will be replied; If the user has made and having replied, then close all microphones and loud speaker node, show the numbering and the failure cause of malfunctioning node; Wait for user's place under repair; Do not reply if the user makes, then central processing unit will be in network q radio microphone node having broken down of deletion automatically, and be written to error log with malfunctioning node numbering and failure cause and to the deletion action of this malfunctioning node; Inform this deletion action of user simultaneously, and jump to the execution link that makes variable q increase by 1; If c is less than C
0, then central processing unit will start p wireless speaker node preparation broadcast, notify q radio microphone node to prepare to receive simultaneously;
Whether the preparation of d4. checking p wireless speaker node and q radio microphone node finishes, if do not finish, whether then central processing unit can attempt repeating to send preparation instruction according to the time interval of △ T, and detect and prepare to accomplish, if at T
dTime period interior nodes preparation can be accomplished, and then jumps to next link and orders p loudspeaker plays template signal; If at T
dThis node still fails to accomplish preparation in time period, then this node is carried out failure diagnosis, confirms reason and notifies the user to repair; If the user makes the request of repairing and replying; Then close all nodes; Demonstration malfunctioning node numbering and failure cause wait for that the user repairs, if the user asks no response to repairing then deletes malfunctioning node automatically; And with notifying the user this deletion action simultaneously, the execution of next link of redirect then in malfunctioning node numbering and the daily record of failure cause write error; After the preparation of p loud speaker node and q microphone node has all finished; Central processing unit orders p loud speaker node to begin the play template signal; After template signal finishes the back and waits for fixed time length; Central processing unit will notify q microphone node to receive the integrity detection of data, and upload the examining report of data integrity to it;
D5. central processing unit carries out analysis and judgement to the data integrity examining report of uploading, if the determinating receiving data integrality is undesired, whether then continues to return c less than C
0The judgement stage, carry out the broadcast of template signal by p loud speaker again; If the decision data integrality is normal, then return in the link that makes q increase by 1.
7. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 1; It is characterized in that: in the described step 2; The roomage response information of each wireless speaker node that all radio microphone nodes will be gathered successively sends to central processing unit, realizes that the flow process of this roomage response information process of transmitting may further comprise the steps:
E. central processing unit is provided with variable q and equals 0, and whether judgment variable q less than M, if variable q is not less than M, informs that then all microphone nodes of central processing unit have accomplished data and sent task, can carry out next link; If variable q less than M, then notifies q radio microphone node to upload the impulse response information based on template signal that this node is gathered to central processing unit;
Whether f. central processing unit will check whether the impulse response information of being sent by q microphone that is received is complete, if the response message that receives is complete, variable q is increased jump to after 1 q in the judgement link less than M; If the response message that receives is imperfect, variable c then is set equals 0;
G. whether central processing unit detection variable c is less than C
0, C
0Be that q radio microphone node uploaded the number of times of pretending to be response message of this node collection to central processing unit, if variable c is not less than C
0Central processing unit will carry out failure diagnosis to q microphone node; And report user repairing, if the user will not reply the request of repairing, then central processing unit will be deleted q microphone node automatically; And the write error daily record notifies the user this deletion action simultaneously, jumps to the execution of next link then; If variable c is less than C
0, then notify q radio microphone node to upload the response message that this node is gathered based on template signal to central processing unit;
H. central processing unit is checked q microphone information integrity that node is uploaded, if data message is imperfect, then still whether redirect returns c less than C
0The judgement link in; If data message is complete, then jump in the link that makes variable q increase by 1.
8. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 1; It is characterized in that: in the described step 2; The roomage response information of each wireless speaker node that all radio microphone nodes will be gathered successively sends to central processing unit; The Frame encapsulating structure of the impulse response information that the microphone node is sent, this Frame comprise the pairing loud speaker numbering of numbering, the impulse response of prefix code section, source address, destination address, data length, microphone, the impulse response data, the check code section that receive.
9. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 1; It is characterized in that: in the described step 3; Central processing unit is carried out the balanced and sound field control algolithm of roomage response, and the parameter that calculates is distributed to each loud speaker node, wherein; Response to a plurality of location point in space is carried out is balanced, adopts the joint equalization device of time-space domain to realize.
10. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 1; It is characterized in that: in the described step 3; Central processing unit is carried out the balanced and sound field control algolithm of roomage response, and the parameter that calculates is distributed to each loud speaker node, wherein; To the sound field control that a plurality of location point in space is carried out, the employing criterion of least squares calculates employed multichannel weight vectors when carrying out sound field control.
11. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 1; It is characterized in that: in the described step 3; Central processing unit is carried out the balanced and sound field control algolithm of roomage response; And the parameter that calculates distributed to each loud speaker node; Wherein, central processing unit successively according to start the loud speaker node, whether inspection starts finishes, the information speaker node prepares to receive parameter value, whether inspection ready, to integrality, the mute speaker node of the loud speaker node value of passing a parameter, inspection parameter value that node receives, check and close the execution that step such as whether finish is carried out the parameter transmission.
12. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 1 is characterized in that: in the described step 3, central processing unit is carried out the balanced and sound field control algolithm of roomage response; And the parameter that calculates distributed to each loud speaker node, the Frame encapsulating structure of described parameter value comprises prefix code section, source address; Destination address, data length, the first identification code section of section; The parameter value data that distributes, section tail identification code section, check code section.
13. based on claim 11 described response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network; It is characterized in that: central processing unit transmit balanced to the loudspeaker node and parameter value process that the sound field control algolithm is found the solution in; Need to detect the startup situation of loudspeaker node; The testing process of this startup situation may further comprise the steps: central processing unit notifies p wireless speaker node to upload the status information that self starts situation to it; Central processing unit will be checked status information and judge whether starting state is normal then, if starting state is normal, then get into the execution of next link; If starting state is undesired, then central processing unit carries out the repeatedly start-up operation of repeatability with attempting, if in the process that repeatability starts, the wireless speaker node has been accomplished normal startup, then jumps to the next link of carrying out; If in repeated start-up course repeatedly, the wireless speaker node is still accomplished normal the startup, and then central processing unit will carry out fault diagnosis to this node, confirm failure cause, and notifies user's place under repair operation; If the user is to repairing the request no response, then central processing unit will be deleted p wireless speaker node automatically, and with malfunctioning node numbering and the daily record of failure cause write error, notify the user this deletion action simultaneously, and jumping to variable p then increases by 1 link; If the user responds the request of repairing, then close all nodes, show malfunctioning node numbering and reason, wait for that the user repairs.
14. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 11; It is characterized in that: central processing unit is before the parameter value of loud speaker node transfer algorithm output; Need to detect the loud speaker node and whether be ready to receive data; The testing process of this SBR may further comprise the steps: central processing unit notifies p wireless speaker node to upload the state information of preparation to it; Central processing unit is analyzed this state information then, and whether the decision node eligible task is accomplished, if node remains unfulfilled eligible task; Then whether central processing unit will be attempted repeating to send preparation instruction and detecting and prepare to accomplish according to the time interval of △ T, if at T
dThe time period interior nodes remains unfulfilled preparation, and then central processing unit will carry out failure diagnosis to node.
15. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 11; It is characterized in that: central processing unit is accomplished after the task of loud speaker node transfer algorithm output parameter value; Need to detect the loud speaker node and whether received complete parameter value data; The integrity detection process of these reception data may further comprise the steps: can not receive complete data if central processing unit detects the loud speaker node; The principle that will transmit according to repeatability repeatedly attempts carrying out C
0Secondary data transmits, if in this repetition transport process, the loud speaker node still can not receive complete data message, and then central processing unit will carry out the failure diagnosis operation to this loud speaker node.
16. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 11; It is characterized in that: central processing unit is detecting after the loud speaker node received complete parameter value data; Whether will carry out shutoff operation to the electric power system of this loud speaker node, and detect this node and normally close, the testing process of this node closed condition may further comprise the steps: central processing unit can send the closed condition query statement to node; If making, node do not reply; Think that then node closes, if node still can be replied the closed condition query statement, then central processing unit carries out C with trial
0Inferior repeated shutoff operation, if after the repeated shutoff operation of these times, node still can't be closed, and then abandons it is carried out shutoff operation, and this can't be closed the daily record of situation write error also notify to the user simultaneously.
17. based on claim 1 described response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network; It is characterized in that: in the described step 4; Central processing unit starts all wireless speaker nodes and gets into duty broadcast audio files; Wherein, central processing unit starts all loudspeaker nodes and gets into duty, after starting all loudspeaker nodes; Central processing unit detects and assesses algorithm performance, and the concrete realization flow of this process may further comprise the steps; Central processing unit will start all microphone nodes; After all microphone nodes startups of detection finish; To notify all loudspeaker nodes to prepare the play template signal notifies all microphone nodes to prepare to receive template signal simultaneously; After all nodes of detection are all ready, will order all loudspeaker node play template signals; After all loudspeaker nodes play template signal; Central processing unit will detect all microphone nodes and whether receive the complete response message based on template signal; After all microphone nodes have all received complete response message, central processing unit will order the response message of the template signal that all microphone nodes network transmission protocol according to the rules will receive successively to send to central processing unit; Whether central processing unit is complete with the response message that detection receives all microphone nodes; After receiving the complete response message of all nodes; Central processing unit will cut out the electric power system of all microphone nodes; Show the frequency response curve after each microphone position point place's equilibrium then, show that simultaneously each microphone position point carries out the acoustic pressure distribution situation after sound field control is handled, and the assessment response portfolio effect is controlled effect with sound field; After showing preset time length, the link of playing user's designated tone source file will be jumped to automatically.
18. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 17; It is characterized in that: in the process that central processing unit detects and assesses algorithm performance; Whether central processing unit need detect all microphone nodes and all start and finish; In this testing process; Central processing unit notifies each microphone node to upload the state information that self starts situation successively, does not accomplish startup if central processing unit determines certain node through state information, then attempts repeatedly notifying this node to start according to designated time intervals and detects the method that it starts situation.
19. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 17; It is characterized in that: in the process that central processing unit detects and assesses algorithm performance; Central processing unit need detect all loud speakers and whether accomplish the preparation before playing; Detect all microphone nodes simultaneously and whether all accomplished the preparation before receiving; Central processing unit detects earlier the preparation of M microphone node, and then detects the preparation of N loud speaker node, if when detecting node and do not accomplish preparation; Then in preset time length, repeatedly repeat to notify this node to play or receive preparation, and detect its preparation according to certain time interval.
20. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 17; It is characterized in that: in the process that central processing unit detects and assesses algorithm performance; Central processing unit need detect the integrality that all microphone nodes receive data; Central processing unit receives data integrity to each microphone node successively and detects; If certain node does not receive complete data message, then central processing unit will be given up the data message of this node, and with wrong write error daily record that this node occurred; It is imperfect in follow-up display operation, will to point out this node location to receive information then, can not participate in the algorithm effects assessment.
21. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 1; It is characterized in that: in the described step 4; Central processing unit starts all wireless speaker nodes and gets into operating state broadcast audio files, and wherein, central processing unit at first notifies all loud speaker nodes to prepare to play audio files; Check the preparation of each loud speaker node then; After all nodes are all ready, order all loud speaker nodes to play audio files, whether still have playing task according at interval continuous detection of fixed time then; If still have playing task, then continue to keep a plurality of loud speaker nodes to carry out playing task, keep to detect whether still have playing task simultaneously; If there is not playing task, then central processing unit will cut out the electric power system of all loud speaker nodes, and self also gets into the dormancy holding state.
22. response equilibrium of loudspeaker array spatial domain and sound field control method based on cordless communication network according to claim 21; It is characterized in that: before playing audio files; Central processing unit need notify all loud speakers to prepare to play and detect its preparation; Wherein, whether central processing unit notifies each loud speaker node to prepare to play audio files, detect each loud speaker node then and all be ready to; If certain node is not ready as yet, then repeatedly repeats to notify this node to play at interval and prepare and detect its preparation situation by certain hour.
23. equilibrium of loudspeaker array roomage response and sound field controlling device based on a cordless communication network, it is characterized in that: it comprises
Be used to collect the impulse response information of all expectation LisPos points; And be used for equilibrium treatment is carried out in the response of desired locations point; Be used for simultaneously the sound field of desired locations point is controlled to reach special sound field distributed needs, also be used for to all wireless speakers and microphone node manage, the central processing unit (2) of the processing of scheduling, operation conditions monitoring and failure diagnosis and case of emergency;
Be used to expect the reception and the storage of the impulse response of LisPos point; And be used for receiving a plurality of radio microphone nodes (1) that response message is sent to central processing unit (2), described a plurality of radio microphone nodes (1) are connected through cordless communication network with central processing unit (2);
Be used to play the template signal of impulse response test period; Be used for playing between the normal operating period audio files of user's appointment simultaneously; Also be used for and central processing unit between carry out a plurality of wireless speaker nodes of information interaction (3), described a plurality of wireless speaker nodes (3) are connected through cordless communication network with central processing unit (2).
24. equilibrium of loudspeaker array roomage response and sound field controlling device based on cordless communication network according to claim 23 is characterized in that: described radio microphone node (1) comprises
Be used to transmit and receive first antenna (4) of radio magnetic wave signal;
Be used for data to be launched are encoded with modulation treatment or are used for the signal that has received is carried out first wireless communication module (5) that the demodulation sign indicating number is handled;
Data in emission or reception and the signal processing module are carried out first data access module (6) of buffer memory;
Be used for to receive or signal to be transmitted carry out processing such as data analysis filtering and noise reduction and channel equalization; Provide the elementary identification of data internal information; Extract in the data message some about the state information of node operation conditions about the number information of node or central processing unit and data size information etc.; Simultaneously also be used for the radiation beam of aerial array is carried out weighting control the spatial emission of adjustment aerial array or first signal processing module (7) of receive direction;
Be used for the sound pressure signal of locus point is carried out the microphone (10) of measurement of inductance;
Be used for to the signal that said microphone (10) is sent into cushion with processing and amplifying first the buffering amplification module (9);
All modules of whole node are carried out supply of electric power and the startup dormancy that can response controller provides and the powered battery module (11) of out code;
Be used for management and dispatch said first wireless communication module (5), first data access module (6), first signal processing module (7), the first buffering amplification module (9), powered battery module (11); The operation conditions of said first wireless communication module (5), first data access module (6), first signal processing module (7), the first buffering amplification module (9), powered battery module (11) is monitored and said first wireless communication module (5), first data access module (6), first signal processing module (7), the first buffering amplification module (9) and collaborative work between the powered battery module (11) are optimized processing, simultaneously said first wireless communication module (5), first data access module (6), first signal processing module (7), first are cushioned first controller module (8) that fault that amplification module (9) and powered battery module (11) occurred and caused accident are in time handled.
25. equilibrium of loudspeaker array roomage response and sound field controlling device based on cordless communication network according to claim 23; It is characterized in that: described central processing unit (2) comprises the data communication of interior all the microphone nodes that comprised of a plurality of responsible execution designated space subregions and loud speaker node and central processing unit and the information content of Frame is analyzed identification and primary signal processing operation; The sub-processor module (12) that can also control the directive property of aerial array radiation beam, be responsible for to a plurality of said sub-processor modules (12) manage, the processing of scheduling, operation conditions monitoring, failure diagnosis and case of emergency; The examining report that also responsible simultaneously antithetical phrase processor module (12) is sent here is analyzed and is adjudicated; Also be responsible for to carry out equalization algorithm and the sound field control algolithm of roomage response CPU module (13), all modules of said central processing unit (2) are supplied power, can respond startup dormancy and out code that central controller (14) sends and first power supply module (17) of carrying out corresponding action.
26. equilibrium of loudspeaker array roomage response and sound field controlling device based on cordless communication network according to claim 25; It is characterized in that: described sub-processor module (12) comprises second antenna (18) that is used for transmitting and receiving the radio magnetic wave signal, will carry out the demodulation code operations to the signal of receiving from node and process of transmitting, will encode and the radio communication submodule (19) of modulation operations, be responsible for the data frame content that receives is analyzed and identification to sent signal at receiving course; Form some and comprise the communication node identity; The communication data frame length; The report information of contents such as communication node running status, and with these information send the signal processing submodule (21) of said CPU module (13) to, reception data that said radio communication submodule (19) is sent here and signal processing submodule (21) are sent here data to be launched and the data cached data access submodule of preserving in real time (20) in the signal processing, to the controller submodule (22) of the emergency processing of management, scheduling, operation conditions monitoring, failure diagnosis and the accident of said radio communication submodule (19), data access submodule (20), signal processing submodule (21).
27. equilibrium of loudspeaker array roomage response and sound field controlling device based on cordless communication network according to claim 25; It is characterized in that: described CPU module (13) comprise with all said controller submodules (22) interconnected and can assign the central controller (14) of control command to all controller submodules (22), interconnected and can receive the information after all signal processing submodules (21) are handled with all said signal processing submodules (21); Be responsible for the central signal processor (15) of the derivation task of roomage response equalization algorithm and sound field control algolithm simultaneously, interconnected and can from data access submodule (20), read to receive data and perhaps in data access submodule (20), write data with all said data access submodules (20); Intermediate variable data to said central signal processor (15) is produced in calculating process are in time preserved and the command information of said central controller (14) are in time preserved, the central data memory access (16) that the audio files that some parameters that the user is provided with and user browsed writes down and backs up.
28. equilibrium of loudspeaker array roomage response and sound field controlling device based on cordless communication network according to claim 23 is characterized in that: described wireless speaker node (3) comprises that the third antenna (23) that is used for transmitting and receiving the radio magnetic wave signal, second wireless communication module (24) that is used for modulation and coding-decoding operation, the buffer memory that is used for data transmission procedure and signal processing are handled second data access module (25) of the preservation of intermediate variable, parametric equalizer and the sound field Control Parameter sent here according to said central processing unit (2) treat the output signal carry out balanced and amplitude-phase adjustment with obtain response balanced with sound field control effect secondary signal processing module (26), to the output signal cushion and the second buffering amplification module (28) of processing and amplifying thereby, be used for the power electrical signal conversion be air vibration produce voice signal loud speaker (30), be responsible for to small-signal carry out power amplification with the power amplifier module (29) that drives loud speaker (30) sounding, be used for to whole node carry out supply of electric power and can respond the startup dormancy and the out code of central processing unit (2) transmission and carry out corresponding action second source supply module (31), responsible to said second wireless communication module (24), second data access module (25), secondary signal processing module (26), second cushions amplification module (28), power amplifier module (29) and second source supply module (31) is managed, second controller module (27) of the emergency processing of scheduling, operation conditions monitoring, failure diagnosis and accident.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210028031.9A CN102611962B (en) | 2012-02-09 | 2012-02-09 | Airspace response balance and sound field control method and device of microphone array based on wireless communication network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210028031.9A CN102611962B (en) | 2012-02-09 | 2012-02-09 | Airspace response balance and sound field control method and device of microphone array based on wireless communication network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102611962A true CN102611962A (en) | 2012-07-25 |
| CN102611962B CN102611962B (en) | 2014-07-09 |
Family
ID=46529075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210028031.9A Active CN102611962B (en) | 2012-02-09 | 2012-02-09 | Airspace response balance and sound field control method and device of microphone array based on wireless communication network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102611962B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414991A (en) * | 2013-05-21 | 2013-11-27 | 杭州联汇数字科技有限公司 | Self-adaptive adjustment method for indoor sound reinforcement system |
| CN103414990A (en) * | 2013-05-21 | 2013-11-27 | 杭州联汇数字科技有限公司 | Method for detecting indoor sound reinforcement device |
| CN103916810A (en) * | 2013-01-05 | 2014-07-09 | 中国科学院声学研究所 | Time domain sound energy contrast control method and system |
| CN104053114A (en) * | 2014-06-28 | 2014-09-17 | 歌尔声学股份有限公司 | Automatic testing method, device and system and automatic testing machine |
| CN105939508A (en) * | 2016-05-04 | 2016-09-14 | 广西科技大学 | High-speed smart self-adaptive wireless acoustic digital microphone |
| WO2019006779A1 (en) * | 2017-07-07 | 2019-01-10 | 广州飞达音响股份有限公司 | Method, device and system for adjusting sound field of active linear array loudspeaker |
| CN109218919A (en) * | 2018-08-23 | 2019-01-15 | 厦门傅里叶电子有限公司 | Loudspeaker amplitude protective module based on Android system audio frame |
| CN110089133A (en) * | 2016-12-19 | 2019-08-02 | 罗伯特·博世有限公司 | Method and apparatus for monitoring at least one speaker wire |
| CN110149159A (en) * | 2019-03-30 | 2019-08-20 | 深圳市新益技术有限公司 | Antenna sensitivity test method based on NB-IoT |
| CN111123888A (en) * | 2019-12-19 | 2020-05-08 | 江苏中天科技软件技术有限公司 | Industrial control protocol testing method and system, electronic equipment and storage medium |
| CN111628838A (en) * | 2019-02-28 | 2020-09-04 | 中国科学院声学研究所 | Distributed emergency broadcast sound field homogenizing method |
| CN115038010A (en) * | 2022-04-26 | 2022-09-09 | 苏州清听声学科技有限公司 | Sound field reconstruction control method and system based on loudspeaker array |
| CN116582803A (en) * | 2023-06-01 | 2023-08-11 | 广州市声讯电子科技股份有限公司 | Self-adaptive control method, system, storage medium and terminal for loudspeaker array |
| CN117395588A (en) * | 2023-12-11 | 2024-01-12 | 苏州清听声学科技有限公司 | Sound field testing method and system for directional sound production equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07288512A (en) * | 1994-04-15 | 1995-10-31 | Matsushita Electric Ind Co Ltd | Wireless microphone equipment |
| JP2001128282A (en) * | 1999-09-01 | 2001-05-11 | Trw Inc | Microphone array processing system for noisy multi-path environment |
| CN101064974A (en) * | 2006-04-28 | 2007-10-31 | 雅马哈株式会社 | Sound field controlling device |
| CN101287308A (en) * | 2007-04-13 | 2008-10-15 | 佳能株式会社 | Method for assigning a plurality of audio channels to a plurality of speakers, corresponding computer program product, storage means and manager mode |
-
2012
- 2012-02-09 CN CN201210028031.9A patent/CN102611962B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07288512A (en) * | 1994-04-15 | 1995-10-31 | Matsushita Electric Ind Co Ltd | Wireless microphone equipment |
| JP2001128282A (en) * | 1999-09-01 | 2001-05-11 | Trw Inc | Microphone array processing system for noisy multi-path environment |
| CN101064974A (en) * | 2006-04-28 | 2007-10-31 | 雅马哈株式会社 | Sound field controlling device |
| CN101287308A (en) * | 2007-04-13 | 2008-10-15 | 佳能株式会社 | Method for assigning a plurality of audio channels to a plurality of speakers, corresponding computer program product, storage means and manager mode |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916810A (en) * | 2013-01-05 | 2014-07-09 | 中国科学院声学研究所 | Time domain sound energy contrast control method and system |
| CN103916810B (en) * | 2013-01-05 | 2016-03-02 | 中国科学院声学研究所 | A kind of time domain acoustic energy compared with control method and system |
| CN103414991A (en) * | 2013-05-21 | 2013-11-27 | 杭州联汇数字科技有限公司 | Self-adaptive adjustment method for indoor sound reinforcement system |
| CN103414990A (en) * | 2013-05-21 | 2013-11-27 | 杭州联汇数字科技有限公司 | Method for detecting indoor sound reinforcement device |
| CN103414990B (en) * | 2013-05-21 | 2016-02-10 | 杭州联汇数字科技有限公司 | Indoor sound reinforcement device detection method |
| CN103414991B (en) * | 2013-05-21 | 2016-07-06 | 杭州联汇数字科技有限公司 | A kind of indoor sound reinforcement system self-adapting regulation method |
| CN104053114A (en) * | 2014-06-28 | 2014-09-17 | 歌尔声学股份有限公司 | Automatic testing method, device and system and automatic testing machine |
| CN105939508A (en) * | 2016-05-04 | 2016-09-14 | 广西科技大学 | High-speed smart self-adaptive wireless acoustic digital microphone |
| CN110089133B (en) * | 2016-12-19 | 2021-09-03 | 罗伯特·博世有限公司 | Method and device for monitoring at least one loudspeaker line |
| CN110089133A (en) * | 2016-12-19 | 2019-08-02 | 罗伯特·博世有限公司 | Method and apparatus for monitoring at least one speaker wire |
| US10917733B2 (en) | 2016-12-19 | 2021-02-09 | Robert Bosch Gmbh | Method and device for monitoring at least one loudspeaker line |
| WO2019006779A1 (en) * | 2017-07-07 | 2019-01-10 | 广州飞达音响股份有限公司 | Method, device and system for adjusting sound field of active linear array loudspeaker |
| CN109218919A (en) * | 2018-08-23 | 2019-01-15 | 厦门傅里叶电子有限公司 | Loudspeaker amplitude protective module based on Android system audio frame |
| CN109218919B (en) * | 2018-08-23 | 2020-09-18 | 厦门傅里叶电子有限公司 | Loudspeaker amplitude protection module based on android system audio framework |
| CN111628838B (en) * | 2019-02-28 | 2021-06-08 | 中国科学院声学研究所 | Distributed emergency broadcast sound field homogenizing method |
| CN111628838A (en) * | 2019-02-28 | 2020-09-04 | 中国科学院声学研究所 | Distributed emergency broadcast sound field homogenizing method |
| CN110149159B (en) * | 2019-03-30 | 2021-06-11 | 深圳市新益技术有限公司 | Antenna sensitivity testing method based on NB-IoT |
| CN110149159A (en) * | 2019-03-30 | 2019-08-20 | 深圳市新益技术有限公司 | Antenna sensitivity test method based on NB-IoT |
| CN111123888A (en) * | 2019-12-19 | 2020-05-08 | 江苏中天科技软件技术有限公司 | Industrial control protocol testing method and system, electronic equipment and storage medium |
| CN115038010A (en) * | 2022-04-26 | 2022-09-09 | 苏州清听声学科技有限公司 | Sound field reconstruction control method and system based on loudspeaker array |
| CN115038010B (en) * | 2022-04-26 | 2023-12-19 | 苏州清听声学科技有限公司 | Sound field reconstruction control method and system based on loudspeaker array |
| CN116582803A (en) * | 2023-06-01 | 2023-08-11 | 广州市声讯电子科技股份有限公司 | Self-adaptive control method, system, storage medium and terminal for loudspeaker array |
| CN116582803B (en) * | 2023-06-01 | 2023-10-20 | 广州市声讯电子科技股份有限公司 | Self-adaptive control method, system, storage medium and terminal for loudspeaker array |
| CN117395588A (en) * | 2023-12-11 | 2024-01-12 | 苏州清听声学科技有限公司 | Sound field testing method and system for directional sound production equipment |
| CN117395588B (en) * | 2023-12-11 | 2024-03-26 | 苏州清听声学科技有限公司 | Sound field testing method and system for directional sound production equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102611962B (en) | 2014-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102611962B (en) | Airspace response balance and sound field control method and device of microphone array based on wireless communication network | |
| CN102907116B (en) | Apparatus and method for measuring a plurality of loudspeakers and microphone array | |
| US9094768B2 (en) | Loudspeaker calibration using multiple wireless microphones | |
| JP5729905B2 (en) | Audio system calibration method and apparatus | |
| US10111018B2 (en) | Processor-readable medium, apparatus and method for updating hearing aid | |
| CN105122844A (en) | Timbre constancy across a range of directivities for a loudspeaker | |
| GB2519868A (en) | Method of optimizing the performance of a loudspeaker using boundary optimisation | |
| CN106068008B (en) | Audio-frequence player device distortion measurement method | |
| CN105144747A (en) | Acoustic beacon for broadcasting the orientation of a device | |
| CN107113492A (en) | The method and apparatus that customized sound distribution is provided | |
| CN110062320A (en) | The test method that noise cancelling headphone filter calculates | |
| CN110139204A (en) | Intelligent sound equipment acoustical behavior test method and system | |
| CN103118323A (en) | Web feature service system (WFS) initiative room compensation method and system based on plane wave decomposition (PWD) | |
| Erbes et al. | Database of single-channel and binaural room impulse responses of a 64-channel loudspeaker array | |
| CN108427099A (en) | For the method for ultrasonic wave indoor positioning, equipment, system and mobile terminal | |
| CN102957572A (en) | Method and device for evaluating performance of system | |
| Zhang et al. | Thunder: towards practical, zero cost acoustic localization for outdoor wireless sensor networks | |
| CN103945308B (en) | A kind of based on wave field synthesis and the low voice speaking of Wave field analysis put method and system | |
| AU2020227012A1 (en) | System and method for complementary audio output | |
| CN113921007B (en) | Method for improving far-field voice interaction performance and far-field voice interaction system | |
| Schulein | Microphone considerations in feedback-prone environments | |
| Stolz et al. | Discussion of Acoustic and Perceptual Optimization Methods for Measuring Spatial Room Impulse Responses with a Mobile Robotic Platform | |
| CN112201220B (en) | Distributed three-dimensional space noise reduction system and application method thereof | |
| CN111628838B (en) | Distributed emergency broadcast sound field homogenizing method | |
| JP7470663B2 (en) | Target sound processing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215133 Suzhou City, Xiangcheng District province science and Technology Park and the road No. 333, No. Patentee after: Suzhou Sonavox electronic Limited by Share Ltd Address before: 215133 Suzhou City, Xiangcheng District province science and Technology Park and the road No. 333, No. Patentee before: Shangsheng Electronic Co., Ltd., Suzhou |
|
| CP01 | Change in the name or title of a patent holder |