CN103796150B - Processing method, device and system of audio signals - Google Patents
Processing method, device and system of audio signals Download PDFInfo
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- CN103796150B CN103796150B CN201210424009.6A CN201210424009A CN103796150B CN 103796150 B CN103796150 B CN 103796150B CN 201210424009 A CN201210424009 A CN 201210424009A CN 103796150 B CN103796150 B CN 103796150B
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Abstract
The invention discloses a processing method of audio signals. The processing method includes: according to azimuth information of a sound source of audio signals of each path relative to a client that listens to the audio signals of the path, a left path delay adjustment and a right path delay adjustment are performed on the audio signals of the path, and audio signals of left and right paths corresponding audio signals of each path are generated; and when a sound source of audio signals of some path moves, different rates are adopted to perform compression or expansion processing on the audio signals of the left and right paths corresponding to the moving audio signals of the path, so that delay of the moving audio signals of the left and right paths changes smoothly. Compared with a phenomenon in the prior art that an ITD jump causes signal distortion, the processing method of the audio signals provided by an embodiment of the invention can enable delay of the audio signals of the left and right paths corresponding to the moving audio signals to be changed smoothly, thereby enabling ITD to be changed smoothly, and preventing signal distortion.
Description
Technical field
The present invention relates to audio signal processing technique field is and in particular to a kind of processing method of audio signal, apparatus and system.
Background technology
Typical meeting framework is the client-clothes based on micro-control unit (MCU, Micro Control Unit) audio mixing
Business device (client-Server) topology, each client with Server keep a two-way connection, Server upper to each
Decoded packet data that Client transmission comes, audio mixing, it is sent to client after re-encoding, this meeting framework based on MCU increases
Postpone end to end, transcoding also reduces voice quality.
Adopt the topology server of forward mode in prior art, the code check of all client is analyzed and will have most
It is probably that M packet of speaker is sent to client, client adopts 3-D audio (3D audio, three-
Dimensional audio) method that synthesizes generating with the stereo of virtual orientation or binaural audio, audio mixing more afterwards.
3D audio synthesis generally comprises spatial positional information, spatial positional information synthesis be using parameter ears time difference (ITD,
Interaural time difference) and intensity difference at two ears (IID, interaural intensity difference)
Synthesized.
Give in prior art processing method using ITD, position filtering (Positional Filter) and IID Lai
The method generating 3D signal, it to be time difference between L/R signal that ITD is corresponding, the level difference of the corresponding L/R signal of ILD,
Positional Filter is corresponding to be an orientation function.
It was found by the inventors of the present invention that the process to audio signal in the generating process of 3D signal in prior art, when
Sound source, when mobile, directly change ITD, so, leads to ITD saltus step, cause distorted signals.
Content of the invention
The embodiment of the present invention provides a kind of processing method of audio signal, can make the corresponding left and right of Mobile audio frequency signal two
The delay smooth change of road signal, so that ITD smooth change, it is to avoid distorted signals.
Embodiment of the present invention first aspect provides a kind of processing method of audio signal, including：
Obtain at least one tunnel audio signal, and the sound source phase of at least one tunnel audio signal Zhong Mei road audio signal described in obtaining
Azimuth information for the user side listening to described every road audio signal；
Sound source according to described every road audio signal, with respect to the azimuth information of described user side, is believed to described every road audio frequency
Number carry out that left postpones adjustment and right wing postpones adjustment, generate the left and right two-way audio signal of corresponding described every road audio signal；
After the message of sound source movement of any one road audio signal at least one tunnel audio signal described in receiving, using not
With ratio any one road audio signal corresponding left and right two-way audio signal of described movement is compressed or expansion at
Reason, makes the delay smooth change respectively of any one road audio signal corresponding left and right two-way audio signal of described movement.
In conjunction with a first aspect, in the first possible implementation, the described sound source according to described every road audio signal
With respect to the azimuth information of described user side, every road audio signal is carried out with left and postpones adjustment and right wing delay adjustment, including：
Sound source according to described every road audio signal, with respect to the azimuth information of described user side, calculates described every road audio frequency
The left of signal postpones and right wing postpones, and the difference that described left postpones to postpone with described right wing is ears time difference ITD；
Left according to described every road audio signal postpones and right wing postpones, and carries out left to described every road audio signal and prolongs
Adjustment late and right wing postpone adjustment.
In conjunction with first aspect or the first possible implementation of first aspect, in the possible implementation of second
In, described using different ratios, any one road audio signal corresponding left and right two-way audio signal of described movement is pressed
Before the step of contracting or divergence process, also include：
Obtain the moving direction of the sound source of described any one road audio signal；
Moving direction according to described sound source and described sound source, with respect to the azimuth information of described user side, calculate described shifting
The dynamic compression of any one road audio signal corresponding left and right two-way audio signal or expansion ratio.
In conjunction with the possible implementation of first aspect second, in the third possible implementation, described sound source is moved
The azimuth information that described sound source target location to be moved to is with respect to described user side is carried in dynamic message；
Described any one road audio signal corresponding left and right two-way audio signal using different ratios to described movement
Be compressed or the step of divergence process before, also include：
According to the azimuth information of described sound source target location to be moved to, calculate any one road audio frequency letter of described movement
Left number in target location postpones and right wing postpones.
The third possible implementation in conjunction with first aspect, in the 4th kind of possible implementation, described according to institute
State the azimuth information that the moving direction of sound source and described sound source are with respect to described user side, calculate any one road sound of described movement
The compression of frequency signal corresponding left and right two-way audio signal or expansion ratio, including：
Obtain any one road audio signal of described movement the distance from home position arrival target location for the sound source and when
Between, and the translational speed of the sound source according to any one road audio signal of described distance and movement described in Time Calculation；
Moving direction according to described sound source and described translational speed calculate described any one road audio signal compression or
The ratio of person's expansion；
Compress according to the ITD of target location, the ITD of origin-location and described Time Calculation or expand the micro- of ratio
Adjust the factor；
According to the described described any one road audio signal calculating compression or expansion ratio and described compression or
Person's expansion fine setting factor of the ratio and moving direction of described sound source, determine described left and right two-way audio signal compression or
Expansion ratio.
The third possible implementation in conjunction with first aspect, in the 5th kind of possible implementation, described process side
Method also includes：
Persistently detect that the left of described left and right two-way audio signal postpones and right wing delay, when the left and right two-way sound detecting
The left of frequency signal postpones and right wing postpones to postpone with the left of the left and right two-way audio signal of target location and right wing postpones phase
Deng when, stop to the compression of described left and right two-way audio signal or expansion.
In conjunction with a first aspect, in the 6th kind of possible implementation, the described step obtaining at least one tunnel audio signal
Afterwards, also include：
The signal intensity of each audio signal at least one tunnel audio signal described in acquisition；
The signal intensity of every road audio signal of described acquisition is adjusted to preset signal strength range.
Embodiment of the present invention second aspect provides a kind of user side, including：
Acquiring unit, for obtaining at least one tunnel audio signal, and at least one tunnel audio signal Zhong Mei road sound described in obtaining
The sound source of frequency signal is with respect to the azimuth information of the user side listening to described every road audio signal；
Signal adjustment unit, for the sound source of every road audio signal that obtained according to described acquiring unit with respect to described use
The azimuth information at family end, carries out left and postpones adjustment and right wing delay adjustment, generate corresponding every road audio frequency to every road audio signal
The left and right two-way audio signal of signal；
Receiving unit, for the disappearing of the sound source movement of any one road audio signal at least one tunnel audio signal described in receiving
Breath；
Signal processing unit, for receiving after the message of described sound source movement in described receiving unit, using different
Ratio is carried out to any one road audio signal corresponding left and right two-way audio signal of the movement that described signal adjustment unit adjusts
Compression or divergence process, make the delay of any one road audio signal corresponding left and right two-way audio signal of described movement respectively
Smooth change.
In conjunction with second aspect, in the first possible implementation, described signal adjustment unit includes：First calculates son
Unit and signal adjustment subelement；
First computation subunit, believes with respect to the orientation of described user side for the sound source according to described every road audio signal
Breath, the left calculating described every road audio signal postpones and right wing delay, and described left postpones the difference postponing with described right wing
For ears time difference ITD；
Signal adjusts subelement, and the left of the every road audio signal for being calculated according to described first computation subunit is prolonged
Postpone with right wing late, described every road audio signal is carried out with left and postpones adjustment and right wing delay adjustment.
In conjunction with second aspect or the first possible implementation of second aspect, in the possible implementation of second
In, described user side also includes computing unit,
Described acquiring unit, for obtaining the moving direction of the sound source of described any one road audio signal；
Described computing unit, for the moving direction of sound source that obtained according to described acquiring unit and described sound source with respect to
The azimuth information of described user side, calculates the pressure of any one road audio signal corresponding left and right two-way audio signal of described movement
Contracting or expansion ratio.
In conjunction with the possible implementation of second aspect second, in the third possible implementation, described sound source is moved
Carry in dynamic message described sound source target location to be moved to respect to described user side azimuth information when,
Described acquiring unit, is additionally operable to obtain the azimuth information with respect to described user side for the described target location；
Described computing unit, be additionally operable to the sound source target location to be moved to that obtained according to described acquiring unit with respect to
The azimuth information of described user side, the left in target location for any one road audio signal calculating described movement postpones and right wing
Postpone.
The third possible implementation in conjunction with second aspect, in the 4th kind of possible implementation, at described signal
Reason unit includes：Obtain subelement, the second computation subunit and determination subelement；
Described acquisition subelement, the sound source for obtaining any one road audio signal of described movement reaches from home position
Target location away from discrete time；
Described second computation subunit, for moving according to the described distance obtaining subelement acquisition and Time Calculation
The sound source of any one road audio signal translational speed, and the moving direction according to described sound source and described translational speed calculate
The compression of described any one road audio signal or the ratio of expansion, further according to the ITD of target location, the ITD of origin-location and
Compress or expand the fine setting factor of ratio described in described Time Calculation；
Described determination subelement, for the described any one road audio signal being calculated according to described second computation subunit
Compression or the ratio of expansion and described compression or the expansion fine setting factor of ratio and the acquisition of described acquisition subelement
The moving direction of sound source, determines compression or the expansion ratio of described left and right two-way audio signal.
The third possible implementation in conjunction with second aspect, in the 5th kind of possible implementation, described user side
Also include detector unit and control unit,
Described detector unit, the left for persistently detecting described left and right two-way audio signal postpones and right wing postpones；
Described control unit, the left of the left and right two-way audio signal for detecting when described detector unit postpones and right
When road postpones to postpone with the left of the left and right two-way audio signal of target location and right wing postpones equal, stop to described left and right two
The compression of road audio signal or expansion.
In conjunction with second aspect, in the 6th kind of possible implementation,
Described acquiring unit, the signal being additionally operable to each audio signal at least one tunnel audio signal described in obtaining is strong
Degree；
Signal adjustment unit, be additionally operable to by described acquiring unit obtain every road audio signal signal intensity be adjusted to pre-
The signal strength range put.
The embodiment of the present invention third aspect provides kind of a computer-readable storage medium, and described computer-readable storage medium is stored with journey
Sequence, includes the partly or completely step of the processing method of audio signal described above during described program execution.
Embodiment of the present invention fourth aspect provides a kind of signal processing apparatus, including：Input equipment, output device, storage
Device and processor；
Wherein, described computing device following steps：
Obtain at least one tunnel audio signal, and the sound source phase of at least one tunnel audio signal Zhong Mei road audio signal described in obtaining
Azimuth information for the signal processing apparatus listening to described every road audio signal；
Sound source according to described every road audio signal with respect to the azimuth information of described signal processing apparatus, to described every road
Audio signal carries out left and postpones adjustment and right wing delay adjustment, generates the left and right two-way audio of corresponding described every road audio signal
Signal；
After the message of sound source movement of any one road audio signal at least one tunnel audio signal described in receiving, using not
With ratio any one road audio signal corresponding left and right two-way audio signal of described movement is compressed or expansion at
Reason, makes the delay smooth change respectively of any one road audio signal corresponding left and right two-way audio signal of described movement.
In conjunction with fourth aspect, in the first possible implementation, described process implement body execution following steps：
Sound source according to described every road audio signal, with respect to the azimuth information of described signal processing apparatus, calculates described every
The left of road audio signal postpones and right wing postpones, and the difference that described left postpones to postpone with described right wing is ears time difference
ITD；
Left according to described every road audio signal postpones and right wing postpones, and carries out left to described every road audio signal and prolongs
Adjustment late and right wing postpone adjustment.
In conjunction with fourth aspect or the first possible implementation of fourth aspect, in the possible implementation of second
In, described processor also executes the following steps：
Obtain the moving direction of the sound source of described any one road audio signal, the moving direction according to described sound source and described
Sound source, with respect to the azimuth information of described user side, calculates any one road audio signal corresponding left and right two-way sound of described movement
The compression of frequency signal or expansion ratio.
In conjunction with the possible implementation of fourth aspect second, in the third possible implementation, described sound source is moved
The azimuth information that described sound source target location to be moved to is with respect to described user side is carried in dynamic message；
Described processor also executes the following steps：
According to the azimuth information of described sound source target location to be moved to, calculate any one road audio frequency letter of described movement
Left number in target location postpones and right wing postpones.
The third possible implementation in conjunction with fourth aspect, in the 4th kind of possible implementation,
Described process implement body execution following steps：
Obtain any one road audio signal of described movement the distance from home position arrival target location for the sound source and when
Between, and the translational speed of the sound source according to any one road audio signal of described distance and movement described in Time Calculation；
Moving direction according to described sound source and described translational speed calculate described any one road audio signal compression or
The ratio of person's expansion；
Compress according to the ITD of target location, the ITD of origin-location and described Time Calculation or expand the micro- of ratio
Adjust the factor；
According to the described described any one road audio signal calculating compression or expansion ratio and described compression or
Person's expansion fine setting factor of the ratio and moving direction of described sound source, determine described left and right two-way audio signal compression or
Expansion ratio.
The third possible implementation in conjunction with fourth aspect, in the 5th kind of possible implementation,
Described processor also executes the following steps：
Persistently detect that the left of described left and right two-way audio signal postpones and right wing delay, when the left and right two-way sound detecting
The left of frequency signal postpones and right wing postpones to postpone with the left of the left and right two-way audio signal of target location and right wing postpones phase
Deng when, stop to the compression of described left and right two-way audio signal or expansion.
In conjunction with fourth aspect, in the 6th kind of possible implementation,
Described processor also executes the following steps：
The signal intensity of each audio signal at least one tunnel audio signal described in acquisition；
The signal intensity of every road audio signal of described acquisition is adjusted to preset signal strength range.
The embodiment of the present invention the 5th aspect provides a kind of signal processing system, including：Sound source and the audio frequency letter listening to sound source
Number user side；
Described sound source is used for sending audio signal；
Described user side is any one user side described in technique scheme.
The embodiment of the present invention using according to the sound source of every road audio signal with respect to the user side listening to this road audio signal
Azimuth information, this road audio signal is carried out with left postpones adjustment and right wing postpones adjustment, generates corresponding described every road audio frequency
The left and right two-way audio signal of signal；When the sound source of a certain road audio signal is mobile, using different ratios, this road is moved
Audio signal corresponding left and right two-way audio signal be compressed or divergence process, make the left and right two-way audio letter of this movement
Number delay respectively smooth change.Compared with prior art, ITD saltus step leads to distorted signals, sound provided in an embodiment of the present invention
The processing method of frequency signal, can make the delay smooth change of the audio signal corresponding left and right two-way audio signal of movement, from
And make ITD smooth change, it is to avoid distorted signals.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those skilled in the art, on the premise of not paying creative work, can also be obtained other attached according to these accompanying drawings
Figure.
Fig. 1 is an embodiment schematic diagram of the processing method that the present invention implements sound intermediate frequency signal；
Fig. 2 is an embodiment schematic diagram of application scenarios in the embodiment of the present invention；
Fig. 3 is an embodiment schematic diagram of user side in the embodiment of the present invention；
Fig. 4 is another embodiment schematic diagram of user side in the embodiment of the present invention；
Fig. 5 is another embodiment schematic diagram of user side in the embodiment of the present invention；
Fig. 6 is another embodiment schematic diagram of user side in the embodiment of the present invention；
Fig. 7 is another embodiment schematic diagram of user side in the embodiment of the present invention；
Fig. 8 is an embodiment schematic diagram of signal processing apparatus in the embodiment of the present invention；
Fig. 9 is an embodiment schematic diagram of signal processing system in the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention provides a kind of processing method of audio signal, can make the corresponding left and right of Mobile audio frequency signal two
The delay smooth change of road signal, so that ITD smooth change, it is to avoid distorted signals.The embodiment of the present invention also provides accordingly
Apparatus and system.It is described in detail individually below.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, the every other enforcement that those skilled in the art are obtained under the premise of not making creative work
Example, broadly falls into the scope of protection of the invention.
The treating method and apparatus of the audio signal of the present invention can apply to conference system, and this conference system can be sound
Frequency conference system or video conferencing system.The media server of conference system receives the language that all participants are sent by user side
Sound stream, the code check of all user sides is synthesized a big bag or the form of multiple parcel issues, so for each participant
The code check of other participants can be received.After a user side receives many code streams that media server forwards, buffer subsystem
Network code stream, and decode generation voice data, each participant is distributed by scenery control with the position of each participant, and and
Video and other information representing this participant are mapped.Each participant generates left and right two-way audio signal, finally owns
Left and right two-way audio signal be separately summed and complete audio mixing.
Refering to Fig. 1, an embodiment of the processing method of audio signal provided in an embodiment of the present invention includes：
101st, obtain at least one tunnel audio signal, and the sound of at least one tunnel audio signal Zhong Mei road audio signal described in obtaining
Source is with respect to the azimuth information of the user side listening to described every road audio signal.
Using the user side listening to every road audio signal as the center of circle of semicircle, sound source can be distributed in the embodiment of the present invention
To on the side of semicircle, sound source can be the radius at sound source place and 0 degree of angle on round edge with respect to the azimuth information of described user side
The angle of place radius.
102nd, the sound source according to described every road audio signal is with respect to the azimuth information of described user side, to described every road sound
Frequency signal carries out left and postpones adjustment and right wing delay adjustment, generates the left and right two-way audio letter of corresponding described every road audio signal
Number.
Each described user side has left and right two-way receiving channel, calculates every road audio signal to left and right according to azimuth information
The left of two passages postpones Left Delay and right wing postpones Right Delay.
When the angle of the radius that sound source is located and the radius at 0 degree of angle place is θ, calculate the first delay Delay1 and the
Two delay Delay2.
Delay1=MaxDelay1* | cos (θ) |；Delay2=MaxDelay2* | cos (θ) |
Delay1<Delay2.
When sound source is in described user side left side orientation,
Left Delay=Delay1；Right Delay=Delay2；
When sound source orientation on the right of described user side,
Left Delay=Delay2；Right Delay=Delay1；
Wherein, [MaxDelay1, MaxDelay2] is the left delay of the audio signal of sound source of 0 degree of Angle Position of Far Left
Postpone with right wing；[MaxDelay2, MaxDelay1] is that the left of the audio signal of sound source of rightmost 180 degree Angle Position postpones
Postpone with right wing.
The left of the audio signal of the sound source of position of sound source dead ahead an angle of 90 degrees postpones and right wing postpones all to be respectively 0.
That is, [MaxDelay1, MaxDelay2] to be that sound source moves to from the position of dead ahead an angle of 90 degrees the most left, 0
The position at degree angle, the change that left postpones and right wing postpones.
[MaxDelay2, MaxDelay1] the rightest, the position at 180 degree angle that is that sound source moves to from the position of dead ahead an angle of 90 degrees
Put, the change that road postpones and right wing postpones.
Left according to every road audio signal postpones and right wing postpones this road audio signal is adjusted, and generates corresponding every
The left and right two-way audio signal of road audio signal.
Every road audio signal is to the ears time difference ITD=Left Delay-Right Delay of two-way receiving channel
103rd, receive described in after the message of sound source movement of any one road audio signal at least one tunnel audio signal, adopt
With different ratios, any one road audio signal corresponding left and right two-way audio signal of described movement is compressed or expands
Open and process, make the delay smooth change respectively of any one road audio signal corresponding left and right two-way audio signal of described movement.
When being the difference that left and right postpones to postpone with right wing because of ITD, so work as left and right to postpone to become using different ratio counting smooth
During change, from ITD also with smooth change.
The embodiment of the present invention is using obtaining at least one tunnel audio signal, and at least one tunnel audio signal Zhong Mei road described in obtaining
The sound source of audio signal is with respect to the azimuth information of the user side listening to described every road audio signal；Believed according to described every road audio frequency
Number sound source with respect to described user side azimuth information, described every road audio signal is carried out left postpone adjustment and right wing prolong
Adjust late, generate the left and right two-way audio signal of corresponding described every road audio signal；At least one tunnel audio signal described in receiving
In any one road audio signal the message of sound source movement after, using audio frequency letter in any one road to described movement for the different ratios
Number corresponding left and right two-way audio signal is compressed or divergence process, so that any one road audio signal of described movement is corresponded to
Left and right two-way audio signal delay respectively smooth change.Compared with prior art, ITD saltus step leads to distorted signals, this
The processing method of the audio signal that bright embodiment provides, can make the audio signal corresponding left and right two-way audio signal of movement
Postpone smooth change, so that ITD smooth change, it is to avoid distorted signals.
Alternatively, on the basis of the corresponding embodiment of above-mentioned Fig. 1, the process of audio signal provided in an embodiment of the present invention
In another embodiment of method,
The described sound source according to described every road audio signal, with respect to the azimuth information of described user side, is believed to every road audio frequency
Number carry out that left postpones adjustment and right wing postpones adjustment, including：
Sound source according to described every road audio signal, with respect to the azimuth information of described user side, calculates described every road audio frequency
The left of signal postpones and right wing postpones, and the difference that described left postpones to postpone with described right wing is ears time difference ITD；
Left according to described every road audio signal postpones and right wing postpones, and carries out left to described every road audio signal and prolongs
Adjustment late and right wing postpone adjustment.
Alternatively, on the basis of the corresponding alternative embodiment of above-mentioned Fig. 1 and Fig. 1, audio frequency provided in an embodiment of the present invention
In another embodiment of the processing method of signal,
Described any one road audio signal corresponding left and right two-way audio signal using different ratios to described movement
Be compressed or the step of divergence process before, also include：
Obtain the moving direction of the sound source of described any one road audio signal；
Moving direction according to described sound source and described sound source, with respect to the azimuth information of described user side, calculate described shifting
The dynamic compression of any one road audio signal corresponding left and right two-way audio signal or expansion ratio.
Alternatively, on the basis of above-mentioned alternative embodiment, the processing method of audio signal provided in an embodiment of the present invention
Another embodiment in,
Described sound source target location to be moved to is carried with respect to described user side in the message of described sound source movement
Azimuth information；
Described any one road audio signal corresponding left and right two-way audio signal using different ratios to described movement
Be compressed or the step of divergence process before, also include：
According to the azimuth information of described sound source target location to be moved to, calculate any one road audio frequency letter of described movement
Left number in target location postpones and right wing postpones.
Alternatively, on the basis of above-mentioned alternative embodiment, the processing method of audio signal provided in an embodiment of the present invention
Another embodiment in,
The described moving direction according to described sound source and described sound source, with respect to the azimuth information of described user side, calculate institute
State the compression of any one road audio signal corresponding left and right two-way audio signal or the expansion ratio of movement, including：
Obtain any one road audio signal of described movement the distance from home position arrival target location for the sound source and when
Between, and the translational speed of the sound source according to any one road audio signal of described distance and movement described in Time Calculation；
Moving direction according to described sound source and described translational speed calculate described any one road audio signal compression or
The ratio of person's expansion；
Compress according to the ITD of target location, the ITD of origin-location and described Time Calculation or expand the micro- of ratio
Adjust the factor；
According to the described described any one road audio signal calculating compression or expansion ratio and described compression or
Person's expansion fine setting factor of the ratio and moving direction of described sound source, determine described left and right two-way audio signal compression or
Expansion ratio.
In the embodiment of the present invention, sound source is to move to the direction near 90 degree, or moves to the direction away from 90 degree, can
To set to being compression near the direction movement near 90 degree, it is expansion to the direction movement away from 90 degree, the ratio of compression is little
In 1, the ratio of expansion is more than 1.
As：The computing formula of ratio can be：Ratio=1.0+direct*v/c*f0/f；Or Ratio=1.0+
direct*v/c*f0/f*|cos(θ)|；
Wherein, v:Sound source translational speed；c：The speed of sound wave, 340m/s；f0：The height of sound source, such as 1kHz；f:It is sampling
Rate, f value is usually 8kHz, 16kHz, 32kHz；direct:Represent the direction of motion, described user side, -1 table are left in 1 expression
Show near described user side.
Can first obtain sound source from origin-location to target location away from discrete time, uniform motion when setting sound source, can
To calculate the translational speed of sound source.
Then left and right two-way adjustment rate, left adjustment rate Rl=Ratio ± δ are calculated；Right wing adjustment rate Rr=
Ratio±δ；Wherein δ=0.5* | (ITD2-ITD1) |/Times/f；
Wherein ITD1 represents the ears time difference of primary importance, and ITD2 represents the ears time difference of the second position, Times table
Show the time moving to the second position from primary importance, f:It is sample rate, f value is usually 8kHz, 16kHz, 38kHz；
direct.
Rl=Ratio- δ when sound source is on the left side of described user side；Rr=Ratio+ δ；
Rl=Ratio+ δ when sound source is on the right of described user side；Rr=Ratio- δ；
When sound source changes to centre from the left side, Rl=Ratio；Rr=Ratio+ δ；
When sound source changes to centre from the right, Rl=Ratio+ δ；Rr=Ratio；
Alternatively, on the basis of the corresponding embodiment of above-mentioned Fig. 1, the process of audio signal provided in an embodiment of the present invention
In another embodiment of method, also include：
Persistently detect that the left of described left and right two-way audio signal postpones and right wing delay, when the left and right two-way sound detecting
The left of frequency signal postpones and right wing postpones to postpone with the left of the left and right two-way audio signal of target location and right wing postpones phase
Deng when, stop to the compression of described left and right two-way audio signal or expansion.
Alternatively, on the basis of the corresponding embodiment of above-mentioned Fig. 1, the process of audio signal provided in an embodiment of the present invention
In another embodiment of method, after the step of described acquisition at least one tunnel audio signal, also include：
The signal intensity of each audio signal at least one tunnel audio signal described in acquisition；
The signal intensity of every road audio signal of described acquisition is adjusted to preset signal strength range.
The technical scheme that multiple embodiments provide above, can make ITD smooth change, it is to avoid distorted signals.
In fact, left gain G ainL and right wing gain G ainR of audio signal can also be calculated according to θ,
GainL=cos (θ/2)；GainR=sin (θ/2)；
IID=GainL/GainR；
The IID of signal when frequency range is higher, can be adjusted by azimuth information θ.
In order to make it easy to understand, below, describing embodiment of the present invention middle pitch in detail taking specific application scenarios as a example
The processing procedure of frequency signal：
Refering to Fig. 2,60 degree of position, target location is 90 degree of position to the initial position of sound source, if MaxDelay1=
48；MaxDelay2=72, goes out in 60 degree of position calculation：
Delay1=MaxDelay1* | cos (θ) |=48*0.5=24；
Delay2=MaxDelay2* | cos (θ) |=72*0.5=36；
Sound source is on the left side of described user side, so Left Delay=Delay1=24；Right Delay=Delay2
=36；
The ITD=24-36=-12 of two sound channels about 60 degree of positions；
From the beginning of 60 degree of positions, described user side receives the message of this road audio signal movement, carries in mobile messaging
The azimuth information of sound source target location to be moved to is 90 degree, and the left of the audio signal of calculated target positions postpones and right wing
Postpone, it is also 0 that result of calculation is respectively 0, ITD；
Sound source starts to move, and described user side determines that the moving direction of sound source is near 90, determines and is processed using compression, meter
Calculate left compression ratio and the right wing compression ratio of audio signal；
If the translational speed of sound source is 170m/s, f0=4kHz, f=16kHz, Times=12s；
Ratio=1.0+direct*v/c*f0/f=1.0-170/340*4/16=1.0-1/8；
δ=0.5* | (ITD2-ITD1) |/Times/f=0.5*12/12/16=1/32；
Sound source is on the left side of described user side, so left Ratio Ratio is represented with Rl, right wing ratio is represented with Rr：
Rl=Ratio δ=1.0-1/8-1/32=27/32；
Rr=Ratio+ δ=1.0-1/8+1/32=29/32；
According to Rl and Rr, left and right two-way audio signal is compressed respectively in sound source motor process, so that left and right two-way is prolonged
Gradually change late, postpone to be changed into 0 when checking left, when right wing postpones also to be changed into 0, you can judge that sound source has reached 90
Position, stops the compression to left and right two-way audio signal and processes.
In sound source moving process, left signal delay tapers to 0 from 24, and right wing signal delay gradually changes from 36
To 0, so that ITD tapers to 0 from -12, it is to avoid distorted signals.
Refering to Fig. 3, an embodiment of user side provided in an embodiment of the present invention includes：
Acquiring unit 201, for obtaining at least one tunnel audio signal, and at least one tunnel audio signal Zhong Mei road described in obtaining
The sound source of audio signal is with respect to the azimuth information of the user side listening to described every road audio signal；
Signal adjustment unit 202, for the sound source of every road audio signal that obtained according to described acquiring unit 201 with respect to
The azimuth information of described user side, carries out left and postpones adjustment and right wing delay adjustment, generate corresponding every to every road audio signal
The left and right two-way audio signal of road audio signal；
Receiving unit 203, the sound source for any one road audio signal at least one tunnel audio signal described in receiving moves
Message；
Signal processing unit 204, for receiving in described receiving unit 203 after the message of described sound source movement, adopts
Any one road audio signal corresponding left and right two-way audio to the movement that described signal adjustment unit 202 adjusts for the different ratios
Signal is compressed or divergence process, makes any one road audio signal corresponding left and right two-way audio signal of described movement
Postpone smooth change respectively.
In the embodiment of the present invention, acquiring unit 201 obtains at least one tunnel audio signal, and at least one road audio frequency described in obtaining
The sound source of signal Zhong Mei road audio signal is with respect to the azimuth information of the user side listening to described every road audio signal；Signal adjusts
The sound source of every road audio signal that unit 202 obtains according to described acquiring unit 201 with respect to the azimuth information of described user side,
Every road audio signal is carried out with left and postpones adjustment and right wing delay adjustment, generate the left and right two-way sound of corresponding every road audio signal
Frequency signal；Receiving unit 203 receive described at least one tunnel audio signal the sound source movement of any one road audio signal message；
Signal processing unit 204 after described receiving unit 203 receives the message of described sound source movement, using different ratios to institute
State signal adjustment unit 202 adjustment movement any one road audio signal corresponding left and right two-way audio signal be compressed or
Person's divergence process, makes the delay of any one road audio signal corresponding left and right two-way audio signal of described movement smooth respectively and becomes
Change.Compared with prior art, user side provided in an embodiment of the present invention can be using two-way audio about different rate process
Signal, makes left and right two-way postpone smooth change, so that ITD smooth change, it is to avoid distorted signals.
On the basis of the corresponding embodiment of above-mentioned Fig. 3, refering to Fig. 4, user side provided in an embodiment of the present invention another
In embodiment, described signal adjustment unit includes：First computation subunit 2021 and signal adjustment subelement 2022；
First computation subunit 2021, for the sound source according to described every road audio signal with respect to described user side side
Position information, calculates the left delay of described every road audio signal and right wing postpones, and described left postpones and described right wing delay
Difference is ears time difference ITD；
Signal adjusts subelement 2022, for the every road audio signal being calculated according to described first computation subunit 2021
Left postpone and right wing postpone, described every road audio signal is carried out left postpone adjustment and right wing postpone adjustment.
On the basis of the corresponding embodiment of above-mentioned Fig. 3, refering to Fig. 5, user side provided in an embodiment of the present invention another
Embodiment also includes computing unit 205,
Described acquiring unit 201, for obtaining the moving direction of the sound source of described any one road audio signal；
Described computing unit 205, for the moving direction of sound source that obtained according to described acquiring unit 201 and described sound source
With respect to the azimuth information of described user side, calculate any one road audio signal corresponding left and right two-way audio letter of described movement
Number compression or expansion ratio.
On the basis of the corresponding embodiment of above-mentioned Fig. 5, in another embodiment of user side provided in an embodiment of the present invention,
The azimuth information that described sound source target location to be moved to is with respect to described user side is carried in the message of described sound source movement
When,
Described acquiring unit 201, is additionally operable to obtain the azimuth information with respect to described user side for the described target location；
Described computing unit 205, is additionally operable to according to the sound source of described acquiring unit 201 acquisition target location to be moved to
With respect to the azimuth information of described user side, calculate any one road audio signal of described movement left in target location and postpone
Postpone with right wing.
On the basis of the corresponding embodiment of above-mentioned Fig. 5, refering to Fig. 6, user side provided in an embodiment of the present invention another
In embodiment, described signal processing unit includes：Obtain subelement 2041, the second computation subunit 2042 and determination subelement
2043；
Described acquisition subelement 2041, for obtain described movement any one road audio signal sound source from home position
Reach target location away from discrete time；
Described second computation subunit 2042, for obtaining, according to described, distance and the Time Calculation that subelement 2041 obtains
The translational speed of the sound source of any one road audio signal of described movement, and the moving direction according to described sound source and described movement
The compression of any one road audio signal described in speed calculation or the ratio of expansion, further according to the ITD of target location, origin-location
ITD and described Time Calculation described in compression or expansion ratio the fine setting factor；
Described determination subelement 2043, for the described any one road being calculated according to described second computation subunit 2042
The fine setting factor of the ratio of the compression of audio signal or expansion and described compression or expansion ratio and described acquisition are single
The moving direction of the sound source that unit obtains, determines compression or the expansion ratio of described left and right two-way audio signal.
On the basis of the corresponding embodiment of above-mentioned Fig. 5, refering to Fig. 7, user side provided in an embodiment of the present invention another
Embodiment also includes：Detector unit 206 and control unit 207,
Described detector unit 206, the left for persistently detecting described left and right two-way audio signal postpones and right wing postpones；
Described control unit 207, the left of the left and right two-way audio signal for detecting when described detector unit 206 is prolonged
When slow and right wing postpones to postpone with the left of the left and right two-way audio signal of target location and right wing postpones equal, stop to described
The compression of left and right two-way audio signal or expansion.
On the basis of the corresponding embodiment of above-mentioned Fig. 3, in another embodiment of user side provided in an embodiment of the present invention,
Described acquiring unit 201, is additionally operable to the letter of each audio signal at least one tunnel audio signal described in obtaining
Number intensity；
Signal adjustment unit 202, the signal intensity of every road audio signal being additionally operable to obtain described acquiring unit 201 is adjusted
Whole to preset signal strength range.
The embodiment of the present invention additionally provides a kind of computer-readable storage medium, and this computer-readable storage medium has program stored therein, journey
The some or all of step in above-mentioned Audio Signal Processing is included during sequence execution.
Refering to Fig. 8, an embodiment of signal processing apparatus provided in an embodiment of the present invention includes：Input equipment 100, output
Device 200, memorizer 300 and processor 400；
Input equipment 100, output device 200, memorizer 300 and process 400 can be connected by bus or other modes
Connect；
Wherein, described processor 400 executes following steps：
Obtain at least one tunnel audio signal, and the sound source phase of at least one tunnel audio signal Zhong Mei road audio signal described in obtaining
Azimuth information for the signal processing apparatus listening to described every road audio signal；
Sound source according to described every road audio signal with respect to the azimuth information of described signal processing apparatus, to described every road
Audio signal carries out left and postpones adjustment and right wing delay adjustment, generates the left and right two-way audio of corresponding described every road audio signal
Signal；
After the message of sound source movement of any one road audio signal at least one tunnel audio signal described in receiving, using not
With ratio any one road audio signal corresponding left and right two-way audio signal of described movement is compressed or expansion at
Reason, makes the delay smooth change respectively of any one road audio signal corresponding left and right two-way audio signal of described movement.
In some embodiments of the invention, described processor 400 specifically executes following steps：
Sound source according to described every road audio signal, with respect to the azimuth information of described signal processing apparatus, calculates described every
The left of road audio signal postpones and right wing postpones, and the difference that described left postpones to postpone with described right wing is ears time difference
ITD；
Left according to described every road audio signal postpones and right wing postpones, and carries out left to described every road audio signal and prolongs
Adjustment late and right wing postpone adjustment.
In some embodiments of the invention, described processor 400 also executes the following steps：
Obtain the moving direction of the sound source of described any one road audio signal, the moving direction according to described sound source and described
Sound source, with respect to the azimuth information of described user side, calculates any one road audio signal corresponding left and right two-way sound of described movement
The compression of frequency signal or expansion ratio.
In some embodiments of the invention, carry described sound source target to be moved in the message of described sound source movement
Position is with respect to the azimuth information of described user side；
Described processor 400 also executes the following steps：
According to the azimuth information of described sound source target location to be moved to, calculate any one road audio frequency letter of described movement
Left number in target location postpones and right wing postpones.
In some embodiments of the invention, described processor 400 specifically executes following steps：
Obtain any one road audio signal of described movement the distance from home position arrival target location for the sound source and when
Between, and the translational speed of the sound source according to any one road audio signal of described distance and movement described in Time Calculation；
Moving direction according to described sound source and described translational speed calculate described any one road audio signal compression or
The ratio of person's expansion；
Compress according to the ITD of target location, the ITD of origin-location and described Time Calculation or expand the micro- of ratio
Adjust the factor；
According to the described described any one road audio signal calculating compression or expansion ratio and described compression or
Person's expansion fine setting factor of the ratio and moving direction of described sound source, determine described left and right two-way audio signal compression or
Expansion ratio.
In some embodiments of the invention, described processor 400 also executes the following steps：
Persistently detect that the left of described left and right two-way audio signal postpones and right wing delay, when the left and right two-way sound detecting
The left of frequency signal postpones and right wing postpones to postpone with the left of the left and right two-way audio signal of target location and right wing postpones phase
Deng when, stop to the compression of described left and right two-way audio signal or expansion.
In some embodiments of the invention, described processor 400 also executes the following steps：
The signal intensity of each audio signal at least one tunnel audio signal described in acquisition；
The signal intensity of every road audio signal of described acquisition is adjusted to preset signal strength range.
Refering to Fig. 9, the embodiment of the present invention additionally provides an embodiment of signal processing system, including：Sound source 10 and listening to
The user side 20 of the audio signal of sound source；
Described sound source 10, is used for sending audio signal；
Described user side 20 is for obtaining at least one tunnel audio signal and every at least one tunnel audio signal described in obtaining
The sound source of road audio signal is with respect to the azimuth information of the user side listening to described every road audio signal；According to described every road audio frequency
The sound source of signal, with respect to the azimuth information of described user side, carries out left and postpones adjustment and right wing to described every road audio signal
Postpone adjustment, generate the left and right two-way audio signal of corresponding described every road audio signal；At least one road audio frequency letter described in receiving
After the message of sound source movement of any one road audio signal in number, using any one road audio frequency to described movement for the different ratios
Signal corresponding left and right two-way audio signal is compressed or divergence process, makes any one road audio signal pair of described movement
The delay of the left and right two-way audio signal answered smooth change respectively.
User side in the present embodiment can also be sound source, and sound source can also have the function of user side.
As：In a conference system, there are 6 user sides, in speech, this user side serves as sound source, when listening to, should
User side has the function of the user side in the embodiment of the present invention.
When one of user side listens to other 5 user side speeches, can simulate and the user side listened to is placed on
Home position, the user side of other five speeches is placed on the round edge of semicircle, the user that the user side that each is made a speech is listened to this
The radius that end is located with 0 degree of angle has an angle, and this angle is the side with respect to the user side listened to for the user side of this speech
Position information.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Completed with the hardware instructing correlation by program, this program can be stored in a computer-readable recording medium, storage
Medium can include：ROM, RAM, disk or CD etc..
The processing method of the audio signal above embodiment of the present invention being provided, device and system have carried out detailed Jie
Continue, specific case used herein is set forth to the principle of the present invention and embodiment, the explanation of above example is only
It is to be used to help understand the method for the present invention and its core concept；Simultaneously for one of ordinary skill in the art, according to this
Bright thought, all will change in specific embodiments and applications, and in sum, this specification content should not be managed
Solve as limitation of the present invention.
Claims (19)
1. a kind of processing method of audio signal is it is characterised in that include：
Obtain at least one tunnel audio signal, and the sound source of at least one tunnel audio signal Zhong Mei road audio signal described in obtaining with respect to
Listen to the azimuth information of the user side of described every road audio signal；
Sound source according to described every road audio signal, with respect to the azimuth information of described user side, is entered to described every road audio signal
Row left postpones adjustment and right wing postpones adjustment, generates the left and right two-way audio signal of corresponding described every road audio signal；
After the message of sound source movement of any one road audio signal at least one tunnel audio signal described in receiving, obtain described appointing
The moving direction of the sound source of a road audio signal of anticipating, the moving direction according to described sound source and described sound source are with respect to described user
The azimuth information at end, calculates the compression of any one road audio signal corresponding left and right two-way audio signal or the expansion of described movement
Open ratio；
Using different ratios, any one road audio signal corresponding left and right two-way audio signal of described movement is compressed
Or divergence process, makes the delay of any one road audio signal corresponding left and right two-way audio signal of described movement smooth respectively
Change, ears time difference ITD is also with smooth change.
2. processing method according to claim 1 is it is characterised in that the described sound source phase according to described every road audio signal
For the azimuth information of described user side, every road audio signal is carried out with left and postpones adjustment and right wing delay adjustment, including：
Sound source according to described every road audio signal, with respect to the azimuth information of described user side, calculates described every road audio signal
Left postpone and right wing postpones, the difference that described left postpones to postpone with described right wing is ears time difference ITD；
Left according to described every road audio signal postpones and right wing postpones, and described every road audio signal is carried out with left and postpones to adjust
Whole and right wing postpones adjustment.
3. processing method according to claim 1 is it is characterised in that carry described sound source in the message of described sound source movement
Target location to be moved to is with respect to the azimuth information of described user side；
Described using different ratios, any one road audio signal corresponding left and right two-way audio signal of described movement is carried out
Before the step of compression or divergence process, also include：
According to the azimuth information of described sound source target location to be moved to, any one road audio signal calculating described movement exists
The left of target location postpones and right wing postpones.
4. processing method according to claim 3 it is characterised in that
The described moving direction according to described sound source and described sound source, with respect to the azimuth information of described user side, calculate described shifting
The dynamic compression of any one road audio signal corresponding left and right two-way audio signal or expansion ratio, including：
Obtain described movement any one road audio signal sound source from home position arrival target location away from discrete time, and
The translational speed of the sound source of any one road audio signal according to described distance and movement described in Time Calculation；
The compression of the moving direction according to described sound source and described translational speed calculating described any one road audio signal or expansion
The ratio opened；
According to the ITD of target location, the ITD of origin-location and described Time Calculation compress or expansion ratio fine setting because
Son；
The ratio of the compression according to the described described any one road audio signal calculating or expansion and described compression or expansion
Open the fine setting factor of ratio and the moving direction of described sound source, determine compression or the expansion of described left and right two-way audio signal
Ratio.
5. processing method according to claim 3 is it is characterised in that also include：
Persistently detect that the left of described left and right two-way audio signal postpones and right wing delay, when the left and right two-way audio letter detecting
Number left postpone and right wing postpones to postpone with the left of the left and right two-way audio signal of target location and when right wing delay is equal,
Stop the compression to described left and right two-way audio signal or expansion.
6. processing method according to claim 1 it is characterised in that described acquisition at least tunnel audio signal step it
Afterwards, also include：
The signal intensity of each audio signal at least one tunnel audio signal described in acquisition；
The signal intensity of every road audio signal of described acquisition is adjusted to preset signal strength range.
7. a kind of user side is it is characterised in that include：
Acquiring unit, for obtaining at least one tunnel audio signal, and at least one tunnel audio signal Zhong Mei road audio frequency letter described in obtaining
Number sound source with respect to the user side listening to described every road audio signal azimuth information；
Signal adjustment unit, for the sound source of every road audio signal that obtained according to described acquiring unit with respect to described user side
Azimuth information, every road audio signal is carried out with left postpones adjustment and right wing postpones adjustment, generates corresponding every road audio signal
Left and right two-way audio signal；
Receiving unit, for the message of the sound source movement of any one road audio signal at least one tunnel audio signal described in receiving；
Signal processing unit, for receiving in described receiving unit after the message of described sound source movement, makes described acquiring unit
Obtain the moving direction of the sound source of described any one road audio signal；
Computing unit, for the moving direction of sound source and described sound source that are obtained according to described acquiring unit with respect to described user
The azimuth information at end, calculates the compression of any one road audio signal corresponding left and right two-way audio signal or the expansion of described movement
Open ratio；
Described signal processing unit, is additionally operable to any one to the movement that described signal adjustment unit adjusts using different ratios
Road audio signal corresponding left and right two-way audio signal is compressed or divergence process, makes any one road audio frequency of described movement
The delay of signal corresponding left and right two-way audio signal smooth change respectively, ears time difference ITD is also with smooth change.
8. user side according to claim 7 is it is characterised in that described signal adjustment unit includes：First calculates son list
Unit and signal adjust subelement；
First computation subunit, for the sound source according to described every road audio signal with respect to described user side azimuth information,
The left calculating described every road audio signal postpones and right wing delay, and the difference that described left postpones to postpone with described right wing is double
Ear time difference ITD；
Signal adjusts subelement, the left of every road audio signal for being calculated according to described first computation subunit postpone and
Right wing postpones, and described every road audio signal is carried out with left and postpones adjustment and right wing delay adjustment.
9. user side according to claim 7 is wanted it is characterised in that carrying described sound source in the message of described sound source movement
The target location moving to respect to described user side azimuth information when,
Described acquiring unit, is additionally operable to obtain the azimuth information with respect to described user side for the described target location；
Described computing unit, is additionally operable to according to the sound source of described acquiring unit acquisition target location to be moved to respect to described
The azimuth information of user side, the left in target location for any one road audio signal calculating described movement postpones and right wing prolongs
Late.
10. user side according to claim 9 is it is characterised in that described signal processing unit includes：Acquisition subelement,
Second computation subunit and determination subelement；
Described acquisition subelement, the sound source for obtaining any one road audio signal of described movement reaches target from home position
Position away from discrete time；
Described second computation subunit, for according to described obtain subelement obtain distance and movement described in Time Calculation times
The translational speed of the sound source of a road audio signal of anticipating, and described in the moving direction according to described sound source and the calculating of described translational speed
The compression of any one road audio signal or the ratio of expansion, further according to the ITD of target location, the ITD of origin-location and described
Compress or expand the fine setting factor of ratio described in Time Calculation；
Described determination subelement, the pressure of the described any one road audio signal for being calculated according to described second computation subunit
The fine setting factor of the ratio of contracting or expansion and described compression or expansion ratio and the sound source of described acquisition subelement acquisition
Moving direction, determine described left and right two-way audio signal compression or expansion ratio.
11. user sides according to claim 9 are it is characterised in that described user side also includes detector unit and controls single
Unit,
Described detector unit, the left for persistently detecting described left and right two-way audio signal postpones and right wing postpones；
Described control unit, the left of the left and right two-way audio signal for detecting when described detector unit postpones and right wing prolongs
When the slow left with the left and right two-way audio signal of target location postpones and right wing postpones equal, stop to described left and right two-way sound
The compression of frequency signal or expansion.
12. user sides according to claim 7 it is characterised in that
Described acquiring unit, is additionally operable to the signal intensity of each audio signal at least one tunnel audio signal described in obtaining；
Signal adjustment unit, be additionally operable to by described acquiring unit obtain every road audio signal signal intensity be adjusted to preset
Signal strength range.
A kind of 13. signal processing apparatus are it is characterised in that include：Input equipment, output device, memorizer and processor；
Wherein, described computing device following steps：
Obtain at least one tunnel audio signal, and the sound source of at least one tunnel audio signal Zhong Mei road audio signal described in obtaining with respect to
Listen to the azimuth information of the signal processing apparatus of described every road audio signal；
Sound source according to described every road audio signal with respect to the azimuth information of described signal processing apparatus, to described every road audio frequency
Signal carries out left and postpones adjustment and right wing delay adjustment, generates the left and right two-way audio letter of corresponding described every road audio signal
Number；
After the message of sound source movement of any one road audio signal at least one tunnel audio signal described in receiving, obtain described appointing
The moving direction of the sound source of a road audio signal of anticipating, the moving direction according to described sound source and described sound source are with respect to user side
Azimuth information, calculates the compression of any one road audio signal corresponding left and right two-way audio signal or the divergence ratio of described movement
Rate；
Using different ratios, any one road audio signal corresponding left and right two-way audio signal of described movement is compressed
Or divergence process, makes the delay of any one road audio signal corresponding left and right two-way audio signal of described movement smooth respectively
Change, ears time difference ITD is also with smooth change.
14. signal processing apparatus according to claim 13 it is characterised in that
Described process implement body execution following steps：
Sound source according to described every road audio signal, with respect to the azimuth information of described signal processing apparatus, calculates described every road sound
The left of frequency signal postpones and right wing postpones, and the difference that described left postpones to postpone with described right wing is ears time difference ITD；
Left according to described every road audio signal postpones and right wing postpones, and described every road audio signal is carried out with left and postpones to adjust
Whole and right wing postpones adjustment.
15. signal processing apparatus according to claim 13 are it is characterised in that carry institute in the message of described sound source movement
State the azimuth information that sound source target location to be moved to is with respect to described user side；
Described processor also executes the following steps：
According to the azimuth information of described sound source target location to be moved to, any one road audio signal calculating described movement exists
The left of target location postpones and right wing postpones.
16. signal processing apparatus according to claim 15 it is characterised in that
Described process implement body execution following steps：
Obtain described movement any one road audio signal sound source from home position arrival target location away from discrete time, and
The translational speed of the sound source of any one road audio signal according to described distance and movement described in Time Calculation；
The compression of the moving direction according to described sound source and described translational speed calculating described any one road audio signal or expansion
The ratio opened；
According to the ITD of target location, the ITD of origin-location and described Time Calculation compress or expansion ratio fine setting because
Son；
The ratio of the compression according to the described described any one road audio signal calculating or expansion and described compression or expansion
Open the fine setting factor of ratio and the moving direction of described sound source, determine compression or the expansion of described left and right two-way audio signal
Ratio.
17. signal processing apparatus according to claim 15 it is characterised in that
Described processor also executes the following steps：
Persistently detect that the left of described left and right two-way audio signal postpones and right wing delay, when the left and right two-way audio letter detecting
Number left postpone and right wing postpones to postpone with the left of the left and right two-way audio signal of target location and when right wing delay is equal,
Stop the compression to described left and right two-way audio signal or expansion.
18. signal processing apparatus according to claim 13 it is characterised in that
Described processor also executes the following steps：
The signal intensity of each audio signal at least one tunnel audio signal described in acquisition；
The signal intensity of every road audio signal of described acquisition is adjusted to preset signal strength range.
A kind of 19. signal processing systems are it is characterised in that include：Sound source and listen to sound source audio signal user side；
Described sound source is used for sending audio signal；
Described user side is any one user side of the claims 7～12.
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| CN106973355B (en) * | 2016-01-14 | 2019-07-02 | 腾讯科技（深圳）有限公司 | Surround sound implementation method and device |
| CN106658345B (en) * | 2016-11-16 | 2018-11-16 | 青岛海信电器股份有限公司 | A kind of virtual surround sound playback method, device and equipment |
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| CN101263739A (en) * | 2005-09-13 | 2008-09-10 | Srs实验室有限公司 | Systems and methods for audio processing |
| CN101221763A (en) * | 2007-01-09 | 2008-07-16 | 上海杰得微电子有限公司 | Three-dimensional sound field synthesizing method aiming at sub-Band coding audio |
| CN102144405A (en) * | 2008-09-04 | 2011-08-03 | Dts(属维尔京群岛)有限公司 | Interaural time delay restoration system and method |
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