CN109963232A - Audio signal playing device and corresponding acoustic signal processing method - Google Patents
Audio signal playing device and corresponding acoustic signal processing method Download PDFInfo
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- CN109963232A CN109963232A CN201711422082.9A CN201711422082A CN109963232A CN 109963232 A CN109963232 A CN 109963232A CN 201711422082 A CN201711422082 A CN 201711422082A CN 109963232 A CN109963232 A CN 109963232A
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- audio signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
Abstract
The disclosure provides a kind of audio signal playing device, including an inductor and a processor.One angle of at least a loudspeaking plane and a datum plane of the inductor to detect the audio signal playing device.Processor is coupled to inductor, to receive one group of input audio signal, and the information of reception angle, and according to the information processing input audio signal of angle, to generate one group of output audio signal.The audio signal playing device that the disclosure provides can correct the offset for the sound source localization for causing listener to be experienced due to listener and earphone or audio are dialled and put the angle change between device.
Description
Technical field
The present invention relates to audio signal processing technique fields, can correct in particular to a kind of because of listener and earphone or sound
Frequency, which is dialled, puts the angle change between device and the audio signal of the offset of the sound source localization that causes listener to be experienced plays
Device and corresponding acoustic signal processing method.
Background technique
Sound is issued from each point in solid space, and therefore, the various sense of hearings can be used to mention for the people listened to these sound
Show to determine which spatial point sound is originated from.For example, human brain quickly and efficiently handles sound positioning indicating, such as
Sound pressure level between time delay between ear (also that is, time delay) between each eardrum of acoustic shock, hearer's ears is poor, impact is left
The sound of auris dextra is in sensorial phase shift etc., accurately to identify the originating point of sound.Based on this characteristic, many audios now
It dials and puts device or system and the information of multichannel can be passed through into two sound channels by special audio processing in the way of and/or corresponding circuits
System plays, as long as the lucky two sound channel loudspeaker of face of the ears of listener or listener be sitting in two sound channel loudspeaker axis hand over
Meeting point, or listened to using earphone, surrounding effect can be experienced.It is createed in this way, can be exported by two channel sounds
The virtual environment of multichannel, so that the surrounding effect of multichannel is presented by two-channel.
However, the ear and earphone or audio of listener dials the angle put between device still may hair in actual use
Raw offset, the sound source localization mistake for causing listener to be experienced, or the sound listened to can be distorted.
For example, earphone on the market is suitble to the auricle of user when wearing, for everyone different need
There is no with user's wear angle for the sound source signal asked, have elasticity slightly that can adjust in angle, but play
Difference and and then convert, therefore, the audio signal that user is experienced will be different with the angle for wearing earphone, and have
Institute is different.
To solve the above-mentioned problems, the present invention proposes a kind of audio signal playing device and corresponding Audio Signal Processing side
Method can overcome the sound for causing listener to be experienced due to listener and earphone or audio are dialled and put the angle change between device
The problem of source positions mistake, or the sound listened to can be distorted.
Summary of the invention
The present invention discloses a kind of audio signal playing device, including an inductor and a processor.Inductor is to examine
Survey an angle of at least the loudspeaking plane and a datum plane of the audio signal playing device.Processor is coupled to inductor,
To receive one group of input audio signal, and the information of reception angle, and believed according to the information processing input audio of angle
Number, to generate one group of output audio signal.
The present invention discloses a kind of acoustic signal processing method, comprising: receives one group of input audio signal；Detect audio letter
One angle of at least the loudspeaking plane and a datum plane of number playing device；And the information processing input audio according to angle
Signal, to generate one group of output audio signal, to compensate at least first-class for causing input audio signal to be simulated because of angle
Imitate a change in location of sound source.
Detailed description of the invention
Fig. 1 is the example block diagram for showing audio signal playing device described in an embodiment according to the present invention.
Fig. 2 is to show an angle schematic diagram described in an embodiment according to the present invention.
Fig. 3 is to show acoustic signal processing method flow chart described in an embodiment according to the present invention.
Fig. 4 is the angle and variable angle relationship for showing multi-channel audio signal described in an embodiment according to the present invention
Figure.
Description of symbols:
100~audio signal playing device；
110~audio signal input circuit；
120~processor；
130~audio signal output circuit；
140~inductor；
Lt、Rt、Lout、Rout、XC、XL、XR、XRL、XRR
YCL、YCR、YL、YR、YRL、YRR~audio signal；
θL、θR、θRL、θRR~wait angle between the sound source of schools；
ΔθL、ΔθR~variable angle amount.
Specific embodiment
For objects, features and advantages of the present invention can be clearer and more comprehensible, specific embodiments of the present invention are cited below particularly out,
And cooperate Figure of description, it is described in detail below.It is intended to indicate that design of the invention rather than of the invention to limit
Protection scope, it should be understood that the following example can be realized via software, hardware, firmware or above-mentioned any combination.
Fig. 1 is the example block diagram for showing audio signal playing device described in an embodiment according to the present invention.Audio
Signal playing device 100 may include an audio signal input circuit 110, a processor 120, an audio signal output circuit 130
An and inductor 140.An embodiment according to the present invention, audio signal playing device 100 can be a Headphone device, an audio
Signal player or a virtual reality object wearing device.For example, a Headphone device or a virtual reality headset device
L channel earphone and right-channel ear can configure audio signal playing device 100 as shown in Figure 1.
Audio signal input circuit 110 is to receive the one group of input audio signal transmitted by a transmission end (not shown)
(Rt,Lt).An at least loudspeaking plane and the one of a datum plane of the inductor 140 to detect audio signal playing device 100
Angle.For example, as shown in Fig. 2, being configured in a L channel earphone or right-channel ear in audio signal playing device 100
Embodiment in, the datum plane can be the plane defined according to user's auricle or the person's of being used in parallel auricle
A plane or a horizontal plane or a vertical plane, and the shell of audio signal playing device 100 can define a loudspeaking plane
(that is, the plane for playing out audio signal).Therefore, angle theta can represent a loudspeaking plane of audio signal playing device and listen
One angle of the receiving plane of hearer.It is that datum plane and loudspeaking plane are represented with two axial lines in Fig. 2, to show two planes
Between angle theta, wherein the axis for representing loudspeaking plane can be any axis in the loudspeaking plane for passing through earphone or according to
An X-axis, Y-axis or the Z axis that one hull shape of audio signal playing device 100 is defined.
An embodiment according to the present invention, inductor 140 can be a direction inductor device, an electronic compass inductor (E-
Compass) or an acceleration induction device (G-sensor), wherein the unit of 140 output data of inductor can be angle.More
Specifically, a loudspeaking plane of the sustainable detection audio signal playing device 100 of inductor 140 and the one of listener receive flat
An at least axis for the sustainable detection audio signal playing device 100 of one angle theta or inductor 140 in face is (for example, Yu Yin
The loudspeaking plane of frequency signal playing device 100 or pass through audio signal playing device 100 loudspeaking plane an axis) with a base
One angle of directrix plane.
Processor 120 is coupled to inductor 140, and receives input audio signal (Rt, Lt), and receives angle theta
Information, and according to the information processing input audio signal (Rt, Lt) of angle theta, with generate one group of output audio signal (Rout,
Lout).An embodiment according to the present invention, input audio signal (Rt, Lt) can be one group of binaural audio signal, and wherein Rt can
Right channel audio signal is represented, Lt can represent left channel audio signal.An embodiment according to the present invention, output audio signal
(Rout, Lout) also can be one group of binaural audio signal, and wherein Rout can represent right channel audio signal, and Lout can represent a left side
Channel audio signal.
An embodiment according to the present invention, before output audio signal, processor 120 can be according to the information processing of angle theta
Input audio signal (Rt, Lt) is caused to compensate or correct because of angle theta with generating output audio signal (Rout, Lout)
A change in location or offset for at least one equivalent sound source that input audio signal is simulated.Further, since transmission end is sustainable
It provides input audio signal (Rt, Lt), and listener rotation head or adjustment audio signal may play dress during listening to
100 wearing mode, angle etc., inductor 140 or the sustainable variation or offset for detecting angle theta of processor 120 are set, and
Continued to handle subsequently received input audio signal (Rt, Lt) according to the variation of angle theta or offset by processor 120, with
Compensate or correct the subsequent at least one equivalent sound source for causing input audio signal to be simulated because of the variation of angle theta or offset
Change in location or offset.Following paragraphs will be further explained for signal processing performed by processor 120.
It is worth noting that, processor 120 also can directly receive input audio signal (Rt, Lt), or directly export audio
Signal (Rout, Lout).Therefore, in some embodiments of the present invention, audio signal playing device 100 can need not include specific
Audio signal input circuit 110 and/or audio signal output circuit 130.In addition, according to other embodiments of the invention, place
Reason device 120 also can only be configured in the one of them of dual-channel headphone, and inductor 140 can pass through wired or wireless mode
The information of the variation of the information or angle theta of the corresponding angle theta detected sends processor 120 to.
Fig. 3 is to show acoustic signal processing method flow chart described in an embodiment according to the present invention.Firstly, receiving one
Group input audio signal (Rt,Lt) (step S302), wherein input audio signal may include left channel audio signal LtWith right channel
Audio signal Rt.Then, an angle of a receiving plane of a loudspeaking plane and listener for inductor detection L channel is utilized
Or the variation delta θ of angleL, and detect an angle or folder for a loudspeaking plane of right channel and the receiving plane of listener
The variation delta θ at angleR(step S304).Then, the left and right acoustic channels audio signal of input multiple multichannel audios are converted to believe
Number (step S306).For example, the left and right acoustic channels audio signal of input can be converted to five-channel audio letter by processor 120
Number, it include center signal XC, left-side signal XL, right-side signal XR, left rear side signal XRLAnd right lateral side signal XRR。
Then, processor 120 calculates multiple weight gains (step S308) according to the information of angle.Then, processor 120
New multi-channel audio signal (step S308) is synthesized with multi-channel audio signal according to resulting weight gain.For example,
The multi-channel audio signal of synthesis may include center signal YCLWith YCR, left-side signal YL, right-side signal YR, left rear side signal YRLWith
And right lateral side signal YRR.Finally, the multi-channel audio signal of synthesis is converted to one group of output audio signal by processor 120
(Rout,Lout) (step S310).
It is worth noting that, being converted to multichannel (for example, 5 sound channels, 7 sound channels etc.) audio signal by binaural audio signal
Conversion regime and by multi-channel audio signal be converted to two-channel conversion regime can there are many planting different embodiment,
It and is industry it is well known that therefore, the present invention simultaneously will not be repeated here.
Fig. 4 is the angle and variable angle relationship for showing multi-channel audio signal described in an embodiment according to the present invention
Figure.In this embodiment, processor 120 can be by the left and right acoustic channels audio signal (R of inputt,Lt) be converted to five sound of solid space
Audio channel signal, comprising being located at 0°Center signal XCAnd center signal XCAngle be θLLeft-side signal XLWith center signal
XCAngle be θRRight-side signal XRAnd center signal XCAngle be θRLLeft rear side signal XRL, and with center signal XC
Angle be θRRRight lateral side signal XRR.In Fig. 4, directly with corresponding audio signal XC、XL、XR、XRLAnd XRRIt represents
One position of the equivalent sound source that each audio signal is simulated.For example, due to the left and right acoustic channels audio signal (R of inputt,
Lt) it can be converted into five-channel audio signal, based on this conversion, the left and right acoustic channels audio signal (R of inputt,Lt) analog goes out five
A equivalent sound source, wherein the position of equivalent sound source is in figure respectively by corresponding audio signal XC、XL、XR、XRLAnd XRR
It indicates, the sound to represent each sound channel that listener is experienced is by with the azimuth 0 represented by scheming°、θL、θR、
θRL、θRRListener is incident to from corresponding equivalent sound source location.
Assuming that a receiving plane of the left ear of a loudspeaking plane and listener for the L channel of audio signal playing device 100
Angle variable quantity be Δ θL, the auris dextra of a loudspeaking plane and listener for the right channel of audio signal playing device 100
The variable quantity of the angle of one receiving plane is Δ θR, then the variation of this angle will cause input audio signal (Rt,Lt) simulated
Equivalent sound source generate position change, wherein change after equivalent sound source position in figure respectively by corresponding audio
Signal YCL、YCR、YL、YR、YRLAnd YRRIt indicates.Due to input audio signal (Rt,Lt) the equivalent sound source simulated is because of angle
Variation generates the change of position, the sound source localization mistake for causing listener to be experienced, or the sound listened to and can be distorted.
Therefore, in order to correct this offset, processor 120 calculates multiple weight gains according to the information of angle, and according to resulting power
Gain synthesizes new multi-channel audio signal with multi-channel audio signal again.
An embodiment according to the present invention, processor 120 loudspeaking plane and listener according to detected by inductor 140
The variation delta θ of the angle of one receiving planeR/ΔθLEach multichannel sound of the ratio calculation of angle between each equivalent sound source
Offset weight corresponding to frequency signal, and with calculating weight gain according to offset weight, wherein the angle between equivalent sound source
θL、θR、θRL、θRRFor known to processor 120.
An embodiment according to the present invention, processor 120 can be calculated separately according to following (1)~(4) formula right-side signal,
The offset weight φ of left-side signal, right rear signal and left rear signal:
And according to following (5)~(12) formula with calculating according to offset weight to synthesize each multi-channel audio signal institute
Corresponding weight gain g:
Then, processor 120 can synthesize new multi-channel audio signal according to following (13)~(18) formula, wherein YCRFor
It is located at 0 synthesized by archicenter signal and right-side signal using utilizing°Center signal, YCLTo believe using using archicenter
Number and left-side signal synthesized by another be located at 0°Center signal, YLLeft-side signal, Y for synthesisRBelieve for the right side of synthesis
Number, YRLFor the left rear side signal of synthesis, YRRFor the right lateral side signal of synthesis:
Finally, the multi-channel audio signal of synthesis can be converted to one according to following (19)~(20) formula by processor 120
Group output audio signal (Rout,Lout):
Rout=k0·YCR+k1·YR+k2·YRRFormula (19)
Lout=k0·YCL+k1·YL+k2·YRLFormula (20)
Wherein coefficient k0=0.707, k1=1, k2=0.707.Resulting output audio signal (Rout,Lout) can effectively mend
The position for repaying or correcting at least one equivalent sound source for causing input audio signal to be simulated because of variable angle or offset becomes
Change or deviates.
It is worth noting that, above-mentioned (1)~(20) formula is only to implement a variety of possible embodiments of the invention wherein
One kind, therefore, the present invention is not limited to above-mentioned calculations.For example, in the embodiment of general earphone, due to left ear with
The variable quantity of the angle of the receiving plane of the loudspeaking plane and listener of auris dextra be it is independent, therefore, in Yu Shangshu calculation,
The audio signal of left and right ear is independently calculated.However, in the embodiment of virtual reality object wearing device, the loudspeaking of Zuo Eryu auris dextra
Plane is relevant to the variable quantity of the angle of the receiving plane of listener, therefore must be to be different from above (1)~(20) formula
Mode calculate.
It, can be effective gram such as above-mentioned, audio signal playing device proposed by the present invention and corresponding acoustic signal processing method
Taking leads to listener due to the receiving plane of listener and earphone or audio dial the angle change between the loudspeaking plane for putting device
The sound source localization mistake experienced, or the problem of the sound listened to can be distorted, to reach more true stereo sound effect
Design.
The above embodiment of the present invention can execute in many ways, for example, using hardware, software or its in conjunction with executing.
It will be understood by a person skilled in the art that the set of any component or component that execute above-mentioned function can be considered as one or more controls
The processor of above-mentioned function.This one or more processors can execute in many ways, such as by specified hardware, or using micro-
Code or software execute above-mentioned function come the common hardware programmed.
Although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention, any this field skill
Art personnel, without departing from the spirit and scope of the invention, when a little variation and retouching, therefore protection scope of the present invention can be done
Subject to view as defined in claim.
Claims (10)
1. a kind of audio signal playing device, comprising:
One inductor, an angle of at least a loudspeaking plane and a datum plane to detect the audio signal playing device；
And
One processor is coupled to the inductor, receiving one group of input audio signal, and receives the information of the angle, and
And according to this group of input audio signal of the information processing of the angle, to generate one group of output audio signal.
2. audio signal playing device as described in claim 1, wherein this group of input audio signal is one group of dual-channel audio
Signal.
3. audio signal playing device as described in claim 1, wherein this group of output audio signal is one group of dual-channel audio
Signal.
4. audio signal playing device as described in claim 1, wherein the processor continues the information processing according to the angle
This group of input audio signal, it is equivalent to compensate cause this group of input audio signal to be simulated because of the variation of the angle at least one
One change in location of sound source.
5. audio signal playing device as described in claim 1, wherein the processor also converts this group of input audio signal
For multiple multi-channel audio signals, multiple weight gains are calculated according to the information of the angle, and according to the multichannel audio
Signal and the weight gain generate this group of output audio signal.
6. a kind of acoustic signal processing method, comprising:
Receive one group of input audio signal；
Detect an angle of at least the loudspeaking plane and a datum plane of an audio signal playing device；And
According to this group of input audio signal of information processing of the angle, to generate one group of output audio signal, to compensate because being somebody's turn to do
Angle and a change in location of at least one equivalent sound source that causes this group of input audio signal to be simulated.
7. method as claimed in claim 6, further includes:
Persistently detect the variation of the angle；And
According to this group of input audio signal of change process of the angle, the group is caused to input sound because of the variation of the angle to compensate
The change in location for at least one equivalent sound source that frequency signal is simulated.
8. method as claimed in claim 6, wherein being gone back according to the step of this group of input audio signal of change process of the angle
Include:
This group of input audio signal is converted into multiple multi-channel audio signals；
Multiple weight gains are calculated according to the information of the angle；And
And this group of output audio signal is generated according to the multi-channel audio signal and the weight gain.
9. method as claimed in claim 6, wherein this group of input audio signal is one group of binaural audio signal.
10. method as claimed in claim 6, wherein this group of output audio signal is one group of binaural audio signal.
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Cited By (1)
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| CN110944261A (en) * | 2019-11-21 | 2020-03-31 | 歌尔股份有限公司 | Earphone sound effect control method and headset |
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Application publication date: 20190702 |