CN104754448B - Become rail acoustic image method for controlling trajectory - Google Patents
Become rail acoustic image method for controlling trajectory Download PDFInfo
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- CN104754448B CN104754448B CN201310754706.2A CN201310754706A CN104754448B CN 104754448 B CN104754448 B CN 104754448B CN 201310754706 A CN201310754706 A CN 201310754706A CN 104754448 B CN104754448 B CN 104754448B
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Abstract
The present invention relates to Audiotechnica, is specifically a kind of change rail acoustic image method for controlling trajectory.The control method is configured by console to the output level value of each audio amplifier node of entity sound box system, acoustic image is moved in the total duration of setting in the way of setting or static, the control method includes：Generate acoustic image track data；With the total duration set by the acoustic image track data in, according to acoustic image track data, adjust the output level of each audio amplifier entity；In the total duration, input to the incoming level of each audio amplifier physical signal and the output level of corresponding audio amplifier entity is overlapped to obtain the level of each audio amplifier entity reality output.The present invention becomes rail acoustic image method for controlling trajectory and control is adjusted to the level of each audio amplifier entity reality output by acoustic image track data, and the acoustic image track motion of setting or static effect can be generated in the total duration set by acoustic image track data.
Description
Technical field
The present invention relates to Audiotechnica, is specifically a kind of change rail acoustic image method for controlling trajectory.
Background technology
Acoustic image track refers to the movement of caused virtual sound image during audio amplifier system plays in performance or changes path.It is existing
Video display, stage Professional sound box system for, audio amplifier position fix after, amplified by the left and right passage master of stage both sides
Or acoustic image is substantially set in the middle position of stage by main amplify in the road of left, center, right three, although performance site is except the master on stage
Beyond amplifying, large number of audio amplifier is also provided with each position, but whole field is performed, the acoustic image of sound box system is almost very
It can change less, therefore it is a need flexibly to control video display, the acoustic image positions of stage Professional sound box system and its trail change
Technical problems to be solved.
The content of the invention
Present invention solves the technical problem that being to provide a kind of can flexibly control video display, the acoustic image position of stage Professional sound box system
Put and the change rail acoustic image method for controlling trajectory of trail change.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of change rail acoustic image TRAJECTORY CONTROL side is provided
Method, the control method are configured by console to the output level value of each audio amplifier node of entity sound box system, acoustic image is existed
Moved in the total duration of setting in the way of setting or static, the control method includes：
Generate acoustic image track data；The acoustic image track data referred within the period of setting length, in order that control
The acoustic image that each virtual audio amplifier node output level is formed in virtual audio amplifier distribution map on platform is run along path set in advance
Move or remain stationary as, the output level data that each audio amplifier node changes over time；
In the total duration corresponding to the acoustic image track data, according to acoustic image track data, each audio amplifier entity is adjusted
Output level；
In the total duration, it will input to the output electricity of the incoming level of each audio amplifier physical signal and corresponding audio amplifier entity
It is flat to be overlapped to obtain the level of each audio amplifier entity reality output；
The change rail acoustic image track data, refers within the period of setting length, in order that acoustic image is run along preset path
Dynamic, the output level data that each audio amplifier node changes over time, the change rail acoustic image track data obtains by the following method：
Audio amplifier node is set：In audio amplifier distribution map, addition or deletion audio amplifier node；
Change audio amplifier nodal community：The attribute of the audio amplifier node includes audio amplifier coordinate, audio amplifier type, corresponds to export and lead to
Road, initialization level；
Divide delta-shaped region：According to the distribution of audio amplifier node, audio amplifier distribution map is divided into multiple delta-shaped regions, often
Three summits of individual delta-shaped region are audio amplifier node；
Setting acoustic image TRAJECTORY CONTROL point and path of running：What setting acoustic image changed over time in audio amplifier distribution map runs
Path, and several acoustic image TRAJECTORY CONTROL points run positioned at this on path；
Edit acoustic image TRAJECTORY CONTROL point attribute：The attribute of the acoustic image TRAJECTORY CONTROL point includes acoustic image TRAJECTORY CONTROL point coordinates
Position, it is corresponding at the time of, to the time needed for next acoustic image TRAJECTORY CONTROL point；
Record becomes rail acoustic image track data：It is each during path of running is run along setting in acoustic image to record each audio amplifier node
The output level numerical value at moment；
Each audio amplifier node calculates in acoustic image along the output level value for setting each moment during path of running is run
Method is：If acoustic image tracing point i is located in the delta-shaped region enclosed by three audio amplifier nodes, i pairs of the acoustic image tracing point
Should at the time of be ti, for the audio amplifier node A of any apex of the delta-shaped region, this moment ti output level is dBA1
=10*lg (LA’/LA), wherein LA' for remaining two straight distance of summit institute structure of the acoustic image tracing point to the delta-shaped region,
LAFor the audio amplifier node A to remaining two straight distance of summit institute structure, other audio amplifier nodes in audio amplifier distribution map
Output level value is zero or negative infinite.
Compared with prior art, have the beneficial effect that：By acoustic image track data to each audio amplifier entity reality output
Control is adjusted in level, and the acoustic image track motion or quiet of setting can be generated in the total duration set by acoustic image track data
Only effect.
Brief description of the drawings
Fig. 1 is the step schematic diagram of the change rail acoustic image method for controlling trajectory of embodiment.
Fig. 2 is the change rail acoustic image track data generation method step schematic diagram of embodiment.
Fig. 3 is the audio amplifier distribution map of embodiment and becomes rail acoustic image track schematic diagram.
Fig. 4 is the triangle audio amplifier node schematic diagram of embodiment.
Fig. 5 is the variable domain acoustic image track data generation method step schematic diagram of embodiment.
Fig. 6 is the audio amplifier distribution map and variable domain acoustic image track schematic diagram of embodiment.
Fig. 7 is the fixed point acoustic image track data generation method step schematic diagram of embodiment.
Fig. 8 is the audio amplifier connection data creation method step schematic diagram of embodiment.
Fig. 9 is the audio amplifier link schematic diagram of embodiment.
Embodiment
The acoustic image TRAJECTORY CONTROL all types of to the present invention is further described below in conjunction with the accompanying drawings.
As shown in figure 1, the present embodiment provides a kind of change rail acoustic image method for controlling trajectory, the control method passes through console
(control main frame) is configured to the output level value of each audio amplifier node of entity sound box system, makes acoustic image in the total duration of setting
Moved in the way of setting or static, the control method includes：
S101:Generate acoustic image track data；
S102:In the total duration corresponding to the acoustic image track data, according to acoustic image track data, it is real to adjust each audio amplifier
The output level of body；
S103:In the total duration, it will input to the incoming level of each audio amplifier physical signal and corresponding audio amplifier entity
Output level is overlapped to obtain the level of each audio amplifier entity reality output.
Acoustic image track data refers within the period of setting length (the lasting i.e. total duration of acoustic image), in order that console
The acoustic image that each virtual audio amplifier node output level is formed in upper virtual audio amplifier distribution map is run along path set in advance
Or remain stationary as, the output level data that each audio amplifier node changes over time.I.e. acoustic image track data contains audio amplifier distribution ground
Output level delta data of whole audio amplifier nodes in the setting length of time section in figure.For each audio amplifier node,
Its output level size changes and changed over time in the setting time section, it is also possible to be zero, negative it is even negative
It is infinite, it is preferential using negative infinite.
The audio amplifier entity that each audio amplifier node corresponds in entity sound box system, each audio amplifier entity are included positioned at same
One or more audio amplifiers of one opening position.I.e. each audio amplifier node can correspond to one or more co-located audio amplifiers.
In order that entity sound box system can accurately reappear acoustic image path, the virtual audio amplifier of each sound in audio amplifier distribution map
The position distribution of node should audio amplifier provider location distribution each with entity sound box system it is corresponding, in particular so that each audio amplifier node it
Between relative position relation, the relative position relation between each audio amplifier entity is corresponding.
The level of audio amplifier entity reality output is real with the audio amplifier in the level of input signal and above-mentioned acoustic image track data
The output level superposition gained of audio amplifier node corresponding to body.The former be input signal characteristic, the latter can be considered as audio amplifier reality
The characteristic of body itself.At any one time, different input signals just has different incoming levels, and real for same audio amplifier
Body, only an output level.It is, therefore, understood that acoustic image trajectory processing is at the output level to each audio amplifier entity
Reason, to form default acoustic image path effect (including acoustic image transfixion).
Incoming level and the output level superposition of audio amplifier entity can be before audio signal actually enter audio amplifier entity first
Being handled, can also be handled again after audio amplifier entity is entered, this link for depending on whole public address system is formed, with
And whether audio amplifier entity is built-in with audio-frequency signal processing module, such as DSP unit.
The type of acoustic image track data includes：Pinpoint audio-visual-data, become rail acoustic image track data and variable domain acoustic image track.
On console during simulation generation acoustic image track data, the speed and process of acoustic image are controlled for convenience, the present invention is implemented
Line segment that example is sequentially connected between some acoustic image TRAJECTORY CONTROL points by discrete distribution in audio amplifier distribution map represents acoustic image
Path of running, i.e., determine the path of running of acoustic image, and acoustic image by several acoustic image TRAJECTORY CONTROL points of discrete distribution
Overall running time.
Acoustic image is pinpointed, is referred within the period of setting length, the one or more audio amplifiers selected in audio amplifier distribution map
Node constantly output level, and unselected audio amplifier node output level numerical value is zero or negative infinite situation.Correspondingly, it is fixed
Point audio-visual-data, refer within the period of setting length, the one or more audio amplifier nodes selected in audio amplifier distribution map are held
Continuous ground output level, and unselected audio amplifier node not output level, or when output level numerical value is zero or negative infinite, Ge Geyin
The output level data that case node changes over time.For selected audio amplifier node, its output level is in the setting time
Continuously (there may also be upper and lower fluctuating change)；And for unselected audio amplifier node, its output level in the setting time
Remain negative infinite.
Become rail acoustic image, refer within the period of setting length, in order that acoustic image is run along preset path, each audio amplifier node
According to the situation of certain rule output level.Correspondingly, become rail acoustic image track data, refer within the period of setting length,
In order that acoustic image is run along preset path, the output level data that each audio amplifier node changes over time.Acoustic image runs path simultaneously
Need not be exactly accurate, and acoustic image motion (running) duration will not be very long, it is only necessary to substantially build audience and can recognize that
Acoustic image run effect.
Variable domain acoustic image, refer within the period of setting length, in order that acoustic image is run along predeterminable area, each audio amplifier node
The situation that changes according to certain rule of output level.Correspondingly, variable domain acoustic image track data referred in the time of setting length,
In order that acoustic image is run along predeterminable area, the output level data that each audio amplifier node changes over time.
As shown in fig. 2, becoming rail acoustic image track data can obtain by the following method:
S201:Audio amplifier node is set：In audio amplifier distribution map 10, addition or deletion audio amplifier node 11, referring to Fig. 3.
S202:Change audio amplifier nodal community：The attribute of audio amplifier node includes audio amplifier coordinate, audio amplifier type, corresponds to export and lead to
Road, initialization level, audio amplifier title etc..Audio amplifier node is represented in audio amplifier distribution map with audio amplifier icon, passes through mobile sound
Case icon can change its coordinate position.Audio amplifier type refers to full-range cabinet or ultralow frequency audio amplifier, and particular type can be according to reality
Need to be divided.Each audio amplifier node in audio amplifier distribution map is all assigned an output channel, each output channel pair
One or more sounds at co-located place should be included in an audio amplifier entity in entity sound box system, each audio amplifier entity
Case.I.e. each audio amplifier node can correspond to one or more co-located audio amplifiers.In order to reappear in audio amplifier distribution map
Designed acoustic image is run path, and the position distribution of audio amplifier entity should be with the position distribution pair of audio amplifier node in audio amplifier distribution map
Should.
S203:Divide delta-shaped region：As shown in figure 3, according to the distribution of audio amplifier node, audio amplifier distribution map is divided more
Individual delta-shaped region, three summits of each delta-shaped region are audio amplifier node；Each delta-shaped region is not overlapping, and each
Other audio amplifier nodes are not included in delta-shaped region, each audio amplifier node and an output channel (or audio playing apparatus)
It is corresponding；
Further, can also aid in determining delta-shaped region, the auxiliary sound box by setting auxiliary sound box node
Node does not have corresponding output channel, not output level；
S204:Setting acoustic image TRAJECTORY CONTROL point and path of running：Acoustic image is set to change over time in audio amplifier distribution map
Path 12 of running, and several acoustic image TRAJECTORY CONTROL points 11 run positioned at this on path.It can set with the following method
Determine acoustic image to run path and acoustic image TRAJECTORY CONTROL point：
1st, fixed point structure：Determine (coordinate) position of several acoustic image TRAJECTORY CONTROL points successively in audio amplifier distribution map,
Several acoustic image TRAJECTORY CONTROL points are in turn connected to form into acoustic image to run path, the acoustic image TRAJECTORY CONTROL point pair of first determination
Should at the time of be zero, at the time of follow-up acoustic image TRAJECTORY CONTROL point corresponds to be from determine first acoustic image TRAJECTORY CONTROL point to determine work as
The time that preceding acoustic image TRAJECTORY CONTROL point is undergone.Such as can be by clicking on sign (such as mouse pointer) audio amplifier distribution
Acoustic image TRAJECTORY CONTROL point is clicked on figure, determines that an acoustic image TRAJECTORY CONTROL point-to-point hits the next acoustic image track control of determination from clicking on
System point elapsed time determines the time span between two acoustic image tracing points, and each acoustic image track is finally calculated
At the time of corresponding to point；
2nd, dragging generation：Dragging marks (such as mouse pointer) along arbitrary line, curve or broken line in audio amplifier distribution map
Motion path so that it is determined that acoustic image is run, during mark is dragged, since initial position, at interval of a period of time Ts all
An acoustic image TRAJECTORY CONTROL point can be generated on the path of running.Ts is 108ms in the present embodiment；
S205:Edit acoustic image TRAJECTORY CONTROL point attribute：The attribute of acoustic image TRAJECTORY CONTROL point is sat including acoustic image TRAJECTORY CONTROL point
Cursor position, it is corresponding at the time of, to the time needed for next acoustic image TRAJECTORY CONTROL point.Can be to selected acoustic image TRAJECTORY CONTROL point institute
Time and acoustic image at the time of corresponding, needed for the selected acoustic image TRAJECTORY CONTROL point to next acoustic image TRAJECTORY CONTROL point run path pair
One or more of total duration answered is modified.
Assuming that acoustic image TRAJECTORY CONTROL point i is ti at the time of correspondence, acoustic image is run to next track from acoustic image TRAJECTORY CONTROL point i
The point i+1 former required times are ti ', and acoustic image total duration corresponding to path of running is t.This means acoustic image is run from initial position
The time needed to acoustic image TRAJECTORY CONTROL point i is ti, and the time that acoustic image runs through needed for whole path is t.
It is complete before the acoustic image TRAJECTORY CONTROL point if being modified at the time of to corresponding to a certain acoustic image TRAJECTORY CONTROL point
Portion's acoustic image TRAJECTORY CONTROL point each self-corresponding moment, and the run total duration in path of acoustic image are required for being adjusted.If acoustic image
TRAJECTORY CONTROL point i is ti at the time of former corresponding, is Ti at the time of correspondence after modification, any sound before acoustic image TRAJECTORY CONTROL point i
It is Tj at the time of correspondence after adjustment as being tj at the time of TRAJECTORY CONTROL point J is former corresponding, acoustic image is run former total duration corresponding to path
For t, amended total duration is T, then Tj=tj/ti* (Ti-ti)+tj, T=t+ (Ti-ti).The adjustment that the present invention uses
Mode advantages of simple, and amount of calculation very little.
It is understood that after time modification corresponding to any acoustic image TRAJECTORY CONTROL point, the time increased or decreased can
Whole acoustic image TRAJECTORY CONTROL points (i.e. aforementioned manner) before distributing to the acoustic image TRAJECTORY CONTROL point in identical duration ratio, also may be used
With the whole acoustic image TRAJECTORY CONTROL points run by each acoustic image of duration pro rate on path.During using latter approach, it is assumed that sound
It is ki as TRAJECTORY CONTROL point i prepares the increased time, then acoustic image TRAJECTORY CONTROL point will be modified to Ti=at the time of correspondence
(ki*ti/t)+ti, i.e. time ki are not all to distinguish dispensing acoustic image TRAJECTORY CONTROL point, and each acoustic image TRAJECTORY CONTROL point is all
Portion of time can be distributed in its ratio with path total duration of running.
If the time needed for a certain acoustic image TRAJECTORY CONTROL point to next acoustic image TRAJECTORY CONTROL point is adjusted, then next
At the time of corresponding to acoustic image TRAJECTORY CONTROL point, and the run total duration in path of acoustic image is required for being adjusted.If acoustic image track
Control point i is ti at the time of former corresponding, is Ti at the time of correspondence after modification, acoustic image from current acoustic image TRAJECTORY CONTROL point i run to
It is Ti ' times required after ti ' is changed that next tracing point i+1 former required times, which are, when acoustic image runs former total corresponding to path
A length of t, amended total duration are T, then Ti+1=Ti+Ti ', T=t+ (Ti-ti)+(Ti '-ti ').
If modification acoustic image is run total duration corresponding to path, then the acoustic image is run each acoustic image TRAJECTORY CONTROL on path
It will be all adjusted at the time of corresponding to point and its to the time needed for next acoustic image TRAJECTORY CONTROL point.If acoustic image TRAJECTORY CONTROL point
I is ti at the time of former corresponding, is Ti at the time of correspondence after adjustment, acoustic image is run to next rail from current acoustic image TRAJECTORY CONTROL point i
It is Ti ' the required times after ti ' adjustment that the mark point i+1 former required times, which be, and acoustic image former total duration corresponding to path of running is t,
Amended total duration is T, then Ti=ti/t* (T-t)+ti, Ti '=ti '/t* (T-t)+ti '.
S206:Record becomes rail acoustic image track data：Each audio amplifier node is recorded to run process along setting path of running in acoustic image
In each moment output level numerical value.
For becoming for rail acoustic image, the output electricity of the related audio amplifier node for generating acoustic image can be calculated by the following method
Level values.Enclosed it is assumed that acoustic image tracing point i (being not necessarily acoustic image TRAJECTORY CONTROL point) is located at by three audio amplifier nodes
In the delta-shaped region formed, acoustic image tracing point i is ti at the time of correspondence, and now the three of vertex position audio amplifier node will be defeated
Go out a certain size level, the output level value of other audio amplifier nodes in audio amplifier distribution map beyond these three audio amplifier nodes
It is zero or negative infinite, so as to ensure that the acoustic image at ti moment in audio amplifier distribution map is located at above-mentioned acoustic image tracing point i.For this three
The audio amplifier node A of any apex of angular domain, this moment ti output level are dBA1=10*lg (LA’/LA), wherein LA’
For remaining two straight distance of summit institute structure of the acoustic image tracing point to the delta-shaped region, LAFor the audio amplifier node A to remaining
The two straight distances of summit institute structure；
Further, each audio amplifier node can also set initialization level value.Assuming that above-mentioned audio amplifier node A initialization
Level is dBA, then in above-mentioned moment ti, audio amplifier node A1 output level dBA1'=dBA+10*lg(LA’/LA).Its lingering sound
Case node set initialization level after t output level by that analogy.
Further, as shown in Fig. 2 if any part acoustic image tracing point (or acoustic image run path) do not fall within any one by
In the delta-shaped region that three audio amplifier nodes are formed (movement locus end), then it is new to set to set auxiliary sound box node 13
Delta-shaped region, to ensure that whole acoustic image tracing points are each fallen within corresponding delta-shaped region, the auxiliary sound box node does not have
There is corresponding output channel, not output level, be only used for auxiliary and determine delta-shaped region；
Further, when recording the output level value of each audio amplifier node, can continuously record, can also be according to certain
Frequency records.For the latter, refer to the output level numerical value that each audio amplifier node is recorded once at interval of certain time.In this reality
Apply in example, acoustic image is recorded in along the output for setting each audio amplifier node when path is run using the frequency of 25 frames/second or 30 frames/second
Level value.The output level data of each audio amplifier node are recorded by certain frequency, it is possible to reduce data volume, accelerate to inputting audio
Signal carries out processing speed during acoustic image trajectory processing, ensures that acoustic image is run the real-time of effect.
As shown in 5 figures, variable domain acoustic image track data can obtain by the following method:
S501：Audio amplifier node is set：In audio amplifier distribution map, addition or deletion audio amplifier node.
S502：Change audio amplifier nodal community：The attribute of audio amplifier node includes audio amplifier coordinate, audio amplifier type, corresponds to export and lead to
Road, initialization level, audio amplifier title etc..Audio amplifier node is represented in audio amplifier distribution map with audio amplifier icon, passes through mobile sound
Case icon can change its coordinate position.Audio amplifier type refers to full-range cabinet or ultralow frequency audio amplifier, and particular type can be according to reality
Need to be divided.Each audio amplifier node in audio amplifier distribution map is all assigned an output channel, each output channel pair
One or more sounds at co-located place should be included in an audio amplifier entity in entity sound box system, each audio amplifier entity
Case.I.e. each audio amplifier node can correspond to one or more co-located audio amplifiers.In order to reappear in audio amplifier distribution map
Designed acoustic image is run path, and the position distribution of audio amplifier entity should be with the position distribution pair of audio amplifier node in audio amplifier distribution map
Should.
S503：Setting acoustic image, which is run, path and divides acoustic image region：Multiple acoustic image regions are set in audio amplifier distribution map,
Each acoustic image region includes several audio amplifier nodes, and sets the path of running for traveling through each acoustic image region.I.e. by acoustic image area
Domain is considered as one " acoustic image point ", and acoustic image is run to another region from a region, until running through whole acoustic image regions successively.Can
, can also be quick to set in the following manner with any acoustic image region for setting each complementary overhangs in audio amplifier distribution map
Acoustic image region：
Set straight line acoustic image to run path in audio amplifier distribution map, and several acoustic image areas are set along acoustic image path of running
Domain, the border in each acoustic image region are approximately perpendicular to the direction of running of the acoustic image.These acoustic image regions can be arranged side by side, and also may be used
To be arranged at intervals, but in order to ensure to give birth to the continuity of acoustic image movement (running), mode is arranged side by side in prioritizing selection.These acoustic image areas
The gross area in domain is less than or equal to the area of whole audio amplifier distribution map.When dividing acoustic image region, wide division can be used,
Not wide division can be used.
During concrete operations, can by drag sign (such as mouse pointer) come and meanwhile set acoustic image to run path and division
Acoustic image region.Specifically：Dragging sign is moved to end in audio amplifier distribution map from a certain start position along some direction
Point position, while according to impartial several acoustic image regions of division of air line distance of the start position to the final position, Ge Gesheng
As the border in region is perpendicular to the straight line of the start position to the final position, and the width in each acoustic image region is impartial.Sound
As running total duration the time that middle final position undergone is moved to drag sign from original position.
Assuming that air line distance of the sign from start position to final position is R, total duration used is t, and equalization is drawn
The quantity for dividing acoustic image region is n, then the n acoustic image region that width is R/n will be automatically generated, and corresponding to each acoustic image region
At the time of be t/n.
S504：Edit acoustic image zone time attribute, including at the time of corresponding to acoustic image region, current acoustic image region is to next
The time required to acoustic image region and acoustic image is run total duration.The editor of acoustic image area attribute compiles with becoming rail acoustic image tracing point attribute
Collect similar.If being modified at the time of to corresponding to a certain acoustic image region, whole acoustic image regions before the sound area domain are each
At the time of corresponding, and the total duration that acoustic image is run is required for being adjusted.If to a certain acoustic image region to next acoustic image region
The required time is adjusted, then at the time of corresponding to next acoustic image region, and acoustic image total duration of running is required for carrying out
Adjustment.If modification acoustic image is run total duration, then at the time of corresponding to each acoustic image region that the acoustic image is run on path and its
It will be all adjusted to the time needed for next acoustic image region.
S505：Variable domain acoustic image track data is recorded, each audio amplifier node is recorded and is run successively in acoustic image along path of running is set
During each acoustic image region, the output level numerical value at each moment.
For variable domain acoustic image, the output electricity of the related audio amplifier node for generating acoustic image can be calculated by the following method
Level values.
As shown in Figure 6, it is assumed that the acoustic image of a certain variable domain track total duration of running is t, is divided into the sound of 4 equal widths altogether
As region, acoustic image of the acoustic image along straight line is run, and from some acoustic image regions 1, (acoustic image region i) is to next acoustic image region 2 in path
(acoustic image region i+1) is mobile, and the run midpoint of line segment that path is located in acoustic image region 1 of acoustic image is the (sound of acoustic image TRAJECTORY CONTROL point 1
As TRAJECTORY CONTROL point i), the run midpoint of line segment that path is located in acoustic image region 2 of acoustic image is the (acoustic image of acoustic image TRAJECTORY CONTROL point 2
TRAJECTORY CONTROL point i+1).During acoustic image tracing point P runs to next acoustic image region 2 from current acoustic image region 1, acoustic image area
The output level of each audio amplifier node is domain 1dB (domain dB in domain 1i), the output level of each audio amplifier node is in acoustic image region 2
Domain 2dB (domain dBi+1), the audio amplifier node output level beyond the two acoustic image regions is zero or negative infinite.
Domain 1dB values=10Slogeη÷2.3025851
Domain 2dB values=10Slogeβ÷2.3025851
Wherein, l12The distance of acoustic image TRAJECTORY CONTROL point 2, l are arrived for acoustic image TRAJECTORY CONTROL point 11PFor acoustic image TRAJECTORY CONTROL point 1
To acoustic image tracing point P distance, lp2Distance for current acoustic image tracing point P to acoustic image TRAJECTORY CONTROL point 2.Can be with from above-mentioned formula
Find out that each acoustic image tracing point there are two acoustic image region output levels, but when acoustic image tracing point is located at the control of each acoustic image track
During system point, only one of which acoustic image region output level, such as when acoustic image tracing point P moves to acoustic image TRAJECTORY CONTROL point 2, this
When there was only the output level of acoustic image region 2, and the output level in acoustic image region 1 is zero.
When recording the output level value of each audio amplifier node in variable domain acoustic image track, can continuously record, can also be according to one
Fixed frequency records.For the latter, refer to the output level numerical value that each audio amplifier node is recorded once at interval of certain time.
In the present embodiment, each audio amplifier node when acoustic image edge setting path is run is recorded in using the frequency of 25 frames/second or 30 frames/second
Output level value.The output level data of each audio amplifier node are recorded by certain frequency, it is possible to reduce data volume, accelerate to input
Audio signal carries out processing speed during acoustic image trajectory processing, ensures that acoustic image is run the real-time of effect.
As shown in 7 figures, fixed point acoustic image track data can obtain by the following method:
S701：Audio amplifier node is set：In audio amplifier distribution map, addition or deletion audio amplifier node.
S702：Change audio amplifier nodal community：The attribute of audio amplifier node includes audio amplifier coordinate, audio amplifier type, corresponds to export and lead to
Road, initialization level, audio amplifier title etc..
S703：Acoustic image tracing point and total duration are set, one or more audio amplifier nodes, institute are selected in audio amplifier distribution map
Selected each audio amplifier node sets acoustic image tracing point in each audio amplifier node residence time as acoustic image tracing point.
S704：Record fixed point acoustic image track data：Record the output at each audio amplifier node each moment in above-mentioned total duration
Level numerical value.
In addition, the acoustic image track data of the present invention also includes audio amplifier link data.Audio amplifier link refers to hold audio amplifier node
Row is operation associated, when associating the active audio amplifier node output level in audio amplifier node, associates the passive sound box section of audio amplifier node
Put automatic output level.Audio amplifier link data are passive sound boxes after being associated operation to several selected audio amplifier nodes
Node relative to active audio amplifier node output level difference.For being necessary the audio amplifier node of link association in spatial distribution
Distance can relatively.
As shown in figure 8, audio amplifier link data can obtain by the following method：
S801：Audio amplifier node is set：In audio amplifier distribution map, addition or deletion audio amplifier node.
S802：Change audio amplifier nodal community：The attribute of audio amplifier node includes audio amplifier coordinate, audio amplifier type, corresponds to export and lead to
Road, initialization level, audio amplifier title etc..
S803：Audio amplifier node link relation is set：Selected ultralow frequency audio amplifier node is connected to neighbouring multiple full ranges
Audio amplifier node；
S804：Record audio amplifier link data：Calculate and record the output level DerivedTrim of the ultralow frequency audio amplifier,
The output level DerivedTrim=10*log (Ratio)+DeriveddB, Ratio=∑ 10(Trim-i+LinkTrim-i)/10, its
Middle Trim-i is the output level value of any full-range cabinet node i itself, and LinkTrim-i is the full-range cabinet section
The former settings of point i and the level that links of the ultralow frequency audio amplifier, DeriveddB are the initialization level of the ultralow frequency audio amplifier node
Value, DerivedTrim are the output level that the ultralow frequency audio amplifier node sets are linked to after some full-range cabinet nodes
Value.One ultralow frequency audio amplifier node may be configured as linking to one or more full-range cabinet nodes, after link, when full-range cabinet section
Point output level, then the ultralow frequency audio amplifier node linked with it will automatic output level, to coordinate full-range cabinet node
Build certain sound effect.For a ultralow frequency audio amplifier node link to a full-range cabinet node, both only need to be considered
Distance, source of sound property and required audio etc., ultralow frequency audio amplifier node can be set and follow the full-range cabinet node automatically
Output level during broadcasting, that is, link level.
As shown in Figure 9, it is assumed that the ultralow frequency audio amplifier node 24 in audio amplifier distribution map links to 3 neighbouring full-range cabinets
Node, itself output level value of full-range cabinet node 21,22,23 are respectively Trim1, Trim2 and Trim3, ultralow frequency audio amplifier
Node 24 originally with each full-range cabinet point 21,22,23 link level value be respectively LinkTrim1, LinkTrim2 with
LinkTrim3.If it is Ratio that level, which is totally added ratio, ultralow frequency audio amplifier node 24 itself initialization level value is
DeriveddB, the last output level value of ultralow frequency audio amplifier node 24 is DerivedTrim, then has：
Ratio=10(Trim1+LinkTrim1)/10+10(Trim2+LinkTrim2)/10+10(Trim3+LinkTrim3)/10
DerivedTrim=10*log (Ratio)+DeriveddB
When Ratio is more than 1, ultralow frequency audio amplifier node 24 is linked to gained output level after these three full-range cabinet nodes
For 0, i.e., its final output level value is initialization level value.
Claims (6)
1. one kind becomes rail acoustic image method for controlling trajectory, the control method is by console to each audio amplifier node of entity sound box system
Output level value is configured, and acoustic image is moved in the total duration of setting in the way of setting or static, it is characterised in that should
Control method includes：
Generate acoustic image track data；The acoustic image track data referred within the period of setting length, in order that on console
The acoustic image that each virtual audio amplifier node output level is formed in virtual audio amplifier distribution map run along path set in advance or
Remain stationary as, the output level data that each audio amplifier node changes over time；
In the total duration corresponding to the acoustic image track data, according to acoustic image track data, the output of each audio amplifier entity is adjusted
Level；
In the total duration, input to the incoming level of each audio amplifier physical signal and the output level of corresponding audio amplifier entity is entered
Row superposition obtains the level of each audio amplifier entity reality output；
Wherein, the acoustic image track data includes becoming rail acoustic image track data, the change rail acoustic image track data, refers to setting
In the period of length, in order that acoustic image is run along preset path, the output level data that each audio amplifier node changes over time, institute
Change rail acoustic image track data is stated to obtain by the following method：
Audio amplifier node is set：In audio amplifier distribution map, addition or deletion audio amplifier node；
Change audio amplifier nodal community：The attribute of the audio amplifier node includes audio amplifier coordinate, audio amplifier type, corresponds to output channel, be first
Beginningization level；
Divide delta-shaped region：According to the distribution of audio amplifier node, audio amplifier distribution map is divided into multiple delta-shaped regions, Mei Gesan
Three summits of angular domain are audio amplifier node；
Setting acoustic image TRAJECTORY CONTROL point and path of running：The road of running for setting acoustic image to change over time in audio amplifier distribution map
Footpath, and several acoustic image TRAJECTORY CONTROL points run positioned at this on path；
Edit acoustic image TRAJECTORY CONTROL point attribute：The attribute of the acoustic image TRAJECTORY CONTROL point includes acoustic image TRAJECTORY CONTROL point coordinates position
At the time of putting, be corresponding, to the time needed for next acoustic image TRAJECTORY CONTROL point；
Record becomes rail acoustic image track data：Record each audio amplifier node and set during path of running is run each moment on acoustic image edge
Output level numerical value；
Each audio amplifier node sets the output level value calculating method at each moment during path of running is run on acoustic image edge
For：If acoustic image tracing point i is located in the delta-shaped region enclosed by three audio amplifier nodes, corresponding to acoustic image tracing point i
Moment is ti, and for the audio amplifier node A of any apex of the delta-shaped region, this moment ti output level is dBA1=10*
lg(LA’/LA), wherein LA' for remaining two straight distance of summit institute structure of the acoustic image tracing point to the delta-shaped region, LAFor
The audio amplifier node A is to remaining two straight distance of summit institute structure, the output of other audio amplifier nodes in audio amplifier distribution map
Level value is zero or negative infinite.
2. change rail acoustic image method for controlling trajectory according to claim 1, it is characterised in that each audio amplifier node is provided with
Level value is initialized, if the initialization level of the audio amplifier node A is dBA, in moment ti, the output electricity of the audio amplifier node A1
Flat dBA1'=dBA+10*lg(LA’/LA), remaining audio amplifier node set initialization level after t output level by that analogy.
3. change rail acoustic image method for controlling trajectory according to claim 1, it is characterised in that set acoustic image with the following method
TRAJECTORY CONTROL point and path of running：Determine the position of several acoustic image TRAJECTORY CONTROL points successively in the audio amplifier distribution map,
Several acoustic image TRAJECTORY CONTROL points are in turn connected to form into acoustic image to run path, the acoustic image TRAJECTORY CONTROL point pair of first determination
Should at the time of be zero, at the time of follow-up acoustic image TRAJECTORY CONTROL point corresponds to be from determine first acoustic image TRAJECTORY CONTROL point to determine work as
The time that preceding acoustic image TRAJECTORY CONTROL point is undergone.
4. change rail acoustic image method for controlling trajectory according to claim 1, it is characterised in that set acoustic image with the following method
TRAJECTORY CONTROL point and path of running：Dragging mark is moved so as to really along arbitrary line, curve or broken line in audio amplifier distribution map
Determine acoustic image to run path, during dragging and marking, since initial position, at interval of for a period of time all can be on the road of running
An acoustic image TRAJECTORY CONTROL point is generated on footpath.
5. change rail acoustic image method for controlling trajectory according to claim 1, it is characterised in that：In editor's acoustic image TRAJECTORY CONTROL point
It is corresponding at the time of, be Ti at the time of correspondence after modification if acoustic image TRAJECTORY CONTROL point i is ti at the time of former corresponding, acoustic image rail
Any acoustic image TRAJECTORY CONTROL point J before the i of mark control point is tj at the time of former corresponding, is Tj at the time of correspondence after adjustment, acoustic image
Former total duration corresponding to path of running is t, and amended total duration is T, then Tj=tj/ti* (Ti-ti)+tj, T=t+
(Ti-ti)。
6. change rail acoustic image method for controlling trajectory according to claim 1, it is characterised in that：If there is part acoustic image tracing point not
Fall into the delta-shaped region that any one is made up of three audio amplifier nodes, auxiliary sound box node and the part acoustic image track are set
Point adjacent audio amplifier node sets new delta-shaped region, run whole acoustic image tracing points in path of the acoustic image is fallen into phase
In the delta-shaped region answered, the auxiliary sound box node is without corresponding output channel, not output level.
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