CN110310654A - Echo cancel method and device, electronic equipment, readable storage medium storing program for executing - Google Patents
Echo cancel method and device, electronic equipment, readable storage medium storing program for executing Download PDFInfo
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0264—Noise filtering characterised by the type of parameter measurement, e.g. correlation techniques, zero crossing techniques or predictive techniques
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
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Abstract
The invention discloses a kind of echo cancel method and device, electronic equipment, readable storage medium storing program for executing, this method comprises: obtaining received first audio signal of at least one loudspeaker and received second audio signal of microphone；Compensation of delay processing is carried out to first audio signal, obtains third audio signal；Obtain the range value that audio signal is transferred to the corresponding transmission function of the microphone from the loudspeaker；Using the range value of the third audio signal and the transmission function, the echo signal generated in second audio signal, by first audio signal is determined；The echo signal is eliminated from second audio signal.
Description
Technical field
The present invention relates to Audio Signal Processing technical fields, more particularly, to a kind of echo cancel method, a kind of echo
Cancellation element, a kind of electronic equipment and a kind of computer readable storage medium.
Background technique
In voice system, influence in order to avoid far-end signal echo to near-end speech quality can generally add echo
Cancellation module.
Traditional echo cancellation algorithm, when handling multichannel loudspeaker broadcasting, since each sound channel signal has strong correlation,
Sef-adapting filter is easy to cause the solution of sef-adapting filter not unique, thus not when handling the signal that microphone receives
Echo can effectively be eliminated.
Summary of the invention
It is an object of the present invention to provide a kind of for eliminating the new solution of echo.
According to the first aspect of the invention, a kind of echo cancel method is provided, comprising:
Obtain received first audio signal of at least one loudspeaker and received second audio signal of microphone；
Compensation of delay processing is carried out to first audio signal, obtains third audio signal；
Obtain the range value that audio signal is transferred to the corresponding transmission function of the microphone from the loudspeaker；
Using the range value of the third audio signal and the transmission function, determine in second audio signal, by
The echo signal that first audio signal generates；
The echo signal is eliminated from second audio signal.
Optionally, the range value of the transmission function obtains in the following manner:
Obtain the received test audio signal of the loudspeaker and the microphone it is received, by the test audio signal
The test echo signal of generation；
According to the intensity value of the intensity value of the test audio signal and the test echo signal, the transmitting letter is determined
Several range values.
Optionally, the range value using the third audio signal and the transmission function, determines second sound
Include: in frequency signal, by the echo signal that first audio signal generates
The yield value or pad value of the third audio signal are determined according to the range value of the transmission function；
Based on the yield value or pad value of the third audio signal, using filter to the third audio signal into
Row processing, the third audio signal that obtains that treated, to be produced as in first audio signal, by second audio signal
Raw echo signal.
Optionally, the method also includes:
Obtain the harmonic distortion signal band information in the third audio signal；
Obtain the amplitude that the audio signal is transferred to the corresponding distortion receptance function of the microphone from the loudspeaker
Value；
Utilize the harmonic distortion signal band information, the range value of the distortion receptance function and the transmission function
Range value determines harmonic distortion signal；
While eliminating the echo signal from second audio signal, the harmonic distortion signal is eliminated.
Optionally, the range value of the distortion receptance function obtains in the following manner:
Obtain the received test audio signal of the loudspeaker and the microphone it is received, by the test audio signal
Corresponding test harmonic distortion signal；
According to the intensity value of the intensity value of the test audio signal and the test harmonic distortion signal, the mistake is determined
The range value of true receptance function.
Optionally, the harmonic distortion signal includes at least second harmonic distortion signal and third harmonic distortion signal.
Optionally, it is described using the low-frequency distortion signal, it is described distortion receptance function range value and the transmitting letter
Several range values determines that harmonic distortion signal includes:
Yield value or the decaying of the harmonic distortion signal band information are determined according to the range value of the transmission function
Value；
Based on the yield value or pad value of the harmonic distortion signal band information, the harmonic wave is lost using filter
The corresponding signal of true signal band information is handled, the corresponding signal of harmonic distortion signal band information that obtains that treated；
According to the range value of the distortion receptance function, treated that harmonic distortion signal band information is corresponding from described
The harmonic distortion signal is determined in signal.
According to the second aspect of the invention, a kind of echo cancelling device is provided, comprising:
Audio signal obtains module, connects for obtaining received first audio signal of at least one loudspeaker and microphone
The second audio signal received；
Delay compensation module obtains third audio signal for carrying out compensation of delay processing to first audio signal；
Transmission function range value obtains module, is transferred to the microphone pair from the loudspeaker for obtaining audio signal
The range value for the transmission function answered；
Echo signal determining module is determined for the range value using the third audio signal and the transmission function
The echo signal generated in second audio signal, by first audio signal；
Cancellation module, for eliminating the echo signal from second audio signal.
According to the third aspect of the invention we, a kind of electronic equipment is provided, comprising: memory and processor, the storage
For storing instruction, described instruction is operated for controlling the processor to execute according to any one of first aspect institute device
The method stated.
According to the fourth aspect of the invention, a kind of computer readable storage medium is provided, computer journey is stored thereon with
Sequence, the computer program realize the method according to any one of first aspect when being executed by processor.
Echo cancel method provided in an embodiment of the present invention can efficiently and accurately eliminate echo, improve user's body
It tests.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the schematic diagram that echo generates.
Fig. 2 is the frame that can be used for realizing the hardware configuration of the electronic equipment of echo cancel method of any embodiment of that present invention
Figure.
Fig. 3 is the process flow diagram of echo cancel method according to an embodiment of the invention.
Fig. 4 is the functional block diagram according to the echo cancelling device of the embodiment of the present invention.
Fig. 5 is the flow diagram of the echo cancel method of an example according to the present invention.
Fig. 6 is a kind of functional block diagram of electronic equipment according to an embodiment of the present invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
The present embodiments relate to echo be acoustic echo.According to Fig. 1, the mistake that available acoustic echo generates
Journey.
Party A-subscriber in Fig. 1 speaks, and voice signal (speech1) passes to the room where party B-subscriber, due to the reflection in space,
Echo speech1 (Echo) is formed again from microphone input, while being superimposed the voice signal (speech2) of party B-subscriber.This
When, party A-subscriber will hear that the sound (speech2) of party B-subscriber has been superimposed the sound (speech1 (Echo)) of oneself, affect just
Normal speech quality.The room application cancelling out echo module where party B-subscriber at this time, can balance out the echo of party A-subscriber, A is allowed to use
Family is only hearing the sound of party B-subscriber.
<hardware configuration>
Fig. 2 is the frame that can be used for realizing the hardware configuration of the electronic equipment of echo cancel method of any embodiment of that present invention
Figure.
Electronic equipment 2000 can be mobile phone, portable computer, tablet computer, palm PC etc. electronic equipment.
Electronic equipment 2000 may include processor 2100, memory 2200, interface arrangement 2300, communication device 2400,
Display device 2500, input unit 2600, loudspeaker 2700, microphone 2800, etc..Wherein, during processor 2100 can be
Central processor CPU, Micro-processor MCV etc..Memory 2200 is for example including ROM (read-only memory), RAM (random access memory
Device), the nonvolatile memory of hard disk etc..Interface arrangement 2300 is for example including USB interface, earphone interface etc..Communication dress
It sets 2400 and is for example able to carry out wired or wireless communication.Display device 2500 is, for example, liquid crystal display, touch display screen etc..It is defeated
Enter device 2600 such as may include touch screen, keyboard.User can by loudspeaker 2700 and microphone 2800 input/it is defeated
Voice messaging out.
Although all illustrating multiple devices to electronic equipment 2000 in Fig. 2, the present invention can only relate to therein
Partial devices, for example, electronic equipment 2000 pertains only to memory 2200 and processor 2100.
Using in an embodiment of the present invention, the memory 2200 of electronic equipment 2000 is for storing instruction, described
Instruction executes echo cancel method provided in an embodiment of the present invention for controlling the processor 2100.
In the foregoing description, technical staff can disclosed conceptual design instruction according to the present invention.How instruction controls place
Reason device is operated, this is it is known in the art that therefore being not described in detail herein.
<embodiment of the method>
Fig. 3 is the process flow diagram of echo cancel method according to an embodiment of the invention.The echo cancel method is
Implemented by electronic equipment.
According to Fig.3, which may comprise steps of S3100-S3500.
Step S3100 obtains received first audio signal of at least one loudspeaker and received second sound of microphone
Frequency signal.
The received, digital-to-analogue conversion (Digital to analog converter, DAC) for loudspeaker of first audio signal
Audio signal before.
Second audio signal received, analog-to-digital conversion (Analog to digital converter, ADC) for microphone
Audio signal later.
Second audio signal includes at least the echo signal generated by the first audio signal.For example, the first audio signal passes through
After loudspeaker broadcasts, it is transferred in microphone, meanwhile, microphone also receives the voice signal of user's sending, in this way, the second sound
Frequency signal includes the echo signal generated by the first audio signal and the voice signal that user issues.
Step S3200 carries out compensation of delay processing to the first audio signal, obtains third audio signal.
Since received first audio signal of loudspeaker and the received echo signal of microphone have certain time-delay,
Before eliminating echo signal in the second audio signal, compensation of delay processing is carried out to the first audio signal, to be aligned second
Echo signal in audio signal.
Step S3300 obtains the range value that audio signal is transferred to the corresponding transmission function of microphone from loudspeaker.
Received first audio signal of loudspeaker and the received echo signal of microphone have certain time-delay, have differences,
But the two be it is highly relevant, i.e., the received echo signal of microphone is caused by received first audio signal of loudspeaker
, in this way, the received echo signal of microphone can be expressed as the function of received first audio signal of loudspeaker, this letter
Number is transmission function.
The range value of the transmission function can obtain in the following manner: obtain the received test audio signal of loudspeaker and
The test echo signal that microphone is received, is generated by test audio signal；According to the intensity value of test audio signal and test
The intensity value of echo signal determines the range value of transmission function.
The quantity of test audio signal is multiple.Each test audio signal corresponds to a frequency values.The frequency values are contained
Cover 20Hz-20KHz.In this way, the range value of the transmission function measured is the range value of the corresponding transmission function of each frequency point.Specifically
Ground is based on following calculating formula (1), the range value F (X) of the corresponding transmission function of each frequency point is calculated,
F (X)=A/a-calculating formula (1),
Wherein, X is different frequent points, and a is the intensity value of the corresponding test audio signal of a certain frequency point, and A is corresponding for the frequency point
Test echo signal intensity value.
Step S3400 is determined in the second audio signal, by using the range value of third audio signal and transmission function
The echo signal that one audio signal generates.
Step S3400 may further include following steps S3410-S3420.
Step S3410 determines the yield value or pad value of third audio signal according to the range value of transmission function.
Based on following calculating formula (2), the yield value or pad value Y of third audio signal is calculated,
Y=20log10F (X)-calculating formula (2),
Wherein, Y is the corresponding yield value of frequency point a certain in third audio signal or pad value.
Step S3420, yield value or pad value based on third audio signal, using filter to third audio signal
It is handled, the third audio signal that obtains that treated, to be returned as in the first audio signal, by what the second audio signal generated
Acoustical signal.
Third audio signal includes the corresponding audio signal of multiple frequency points.Using filter to each in third audio signal
The corresponding audio signal of frequency point is handled.For example, in third audio signal the corresponding audio signal of 1000Hz pad value be-
5DB, then, the attenuation processing of filter audio signal progress -5DB corresponding to 1000Hz in the third audio signal.
Step S3500 eliminates echo signal from the second audio signal.
Echo cancel method provided in an embodiment of the present invention can efficiently and accurately eliminate echo, improve user's body
It tests.
Loudspeaker is easy the presence of distortion, especially low frequency part when playing the first audio signal.The partial distortion signal is difficult
It is eliminated with S3100-S3500 through the above steps.In order to solve this technical problem, in one embodiment of the present of invention
In, the further comprising the steps of S3600-S3900 of echo cancel method.
Step S3600 obtains the harmonic distortion signal band information in third audio signal.
When harmonic distortion signal refers to that audio signal passes through power amplifier, output signal ratio input signal is had more additional humorous
Wave composition.
Harmonic distortion signal band information can be set according to test case.
Step S3700 obtains the range value that audio signal is transferred to the corresponding distortion receptance function of microphone from loudspeaker.
The range value of distortion receptance function obtains in the following manner: obtaining the received test audio signal of loudspeaker and wheat
Gram wind is received, by the corresponding test harmonic distortion signal of test audio signal；According to the intensity value of test audio signal and survey
The intensity value of harmonic distortion signal is tried, determines the range value of distortion receptance function.
The quantity of test audio signal is multiple.Each test audio signal corresponds to a frequency values.The frequency values are contained
Lid harmonic distortion signal frequency range.In this way, the range value of the distortion receptance function measured is that the corresponding distortion of each frequency point responds letter
Several range values.Specifically, following calculating formula (3) are based on, the amplitude of the corresponding distortion receptance function of each frequency point is calculated
Value Dis (X),
Dis (X)=N/A-calculating formula (3),
Wherein, X is different frequent points, and a is the intensity value of the corresponding test audio signal of a certain frequency point, and A is a certain frequency point pair
The intensity value for the test echo signal answered, N are the intensity value of the corresponding harmonic distortion signal of the frequency point.
In one embodiment, harmonic distortion signal includes at least second harmonic distortion signal and third harmonic distortion is believed
Number.
Second harmonic distortion signal refers to the harmful interference signal of two frequencys multiplication of original frequency.Third harmonic distortion signal is
Refer to the harmful interference signal of the frequency tripling of original frequency.
Based on calculating formula (3), the range value Dis of available second-order distortion receptance function2(X) and third order distortion responds letter
Several range value Dis3(X),
Dis2(X)=N2/ A,
Dis3(X)=N3/ A,
Wherein, N2For the intensity value of the corresponding second harmonic distortion signal of the frequency point, N3For the corresponding triple-frequency harmonics of the frequency point
The intensity value of distorted signal.
The intensity value of test harmonic distortion signal can be measured by harmonic measure equipment (for example, harmonic analysis instrument)
It arrives.
Step S3800 using harmonic distortion signal band information, is distorted the range value of receptance function and the width of transmission function
Angle value determines harmonic distortion signal.
Step S3800 further comprises the steps S3810-S3830.
Step S3810 determines the yield value of harmonic distortion signal band information according to the range value of transmission function or declines
Depreciation.
Based on calculating formula (2), the corresponding yield value of each frequency point or pad value in harmonic distortion signal frequency range are determined.
Step S3820, yield value or pad value based on harmonic distortion signal band information, using filter to harmonic wave
The corresponding signal of distorted signal band information is handled, the corresponding letter of harmonic distortion signal band information that obtains that treated
Number.
Step S3830, according to the range value of distortion receptance function, from treated, harmonic distortion signal band information is corresponding
Signal in determine harmonic distortion signal.
Based on calculating formula (4), harmonic distortion signal THD is calculated,
THD=Y*Dis (X)-calculating formula (4).
For example, when harmonic distortion signal includes second harmonic distortion signal and third harmonic distortion signal, calculating formula (4)
Become calculating formula (4a),
THD=Y* [Dis2(X)+Dis3(X)]-calculating formula (4a).
Step S3900, while eliminating echo signal from the second audio signal, harmonic carcellation distorted signal.
<Installation practice>
Fig. 4 is the functional block diagram according to the echo cancelling device of the embodiment of the present invention.
According to Fig.4, the echo cancelling device 4000 of the present embodiment may include that audio signal obtains module 4100, prolongs
When compensating module 4200, transmission function range value obtain module 4300, echo signal determining module 4400, cancellation module 4500.
Audio signal obtains module 4100 for obtaining received first audio signal of at least one loudspeaker and Mike
Received second audio signal of wind.
Delay compensation module 4200 is used to carry out compensation of delay processing to the first audio signal, obtains third audio signal.
Transmission function range value obtains module 4300, and for obtaining audio signal, from loudspeaker to be transferred to microphone corresponding
The range value of transmission function.
The range value of the transmission function can obtain in the following manner: obtain the received test audio signal of loudspeaker and
The test echo signal that microphone is received, is generated by test audio signal；According to the intensity value of test audio signal and test
The intensity value of echo signal determines the range value of transmission function.
The range value of transmission function specifically may refer to above-mentioned calculating formula (1).
Echo signal determining module 4400 is used for the range value using third audio signal and transmission function, determines the second sound
The echo signal generated in frequency signal, by the first audio signal.
Cancellation module 4500 is for eliminating echo signal from the second audio signal.
In one embodiment, echo signal determining module 4400 is further used for being determined according to the range value of transmission function
The yield value or pad value of third audio signal；Yield value or pad value based on third audio signal, utilize filter
Third audio signal is handled, the third audio signal that obtains that treated, using as in the first audio signal, by the second sound
The echo signal that frequency signal generates.Specifically, referring to above-mentioned calculating formula (2).
In one embodiment, echo cancelling device 4000 can also include that harmonic distortion signal band information obtains mould
Block, distortion receptance function range value obtain module, harmonic distortion signal determining module.
Harmonic distortion signal band information obtains module and is used to obtain the harmonic distortion signal frequency range in third audio signal
Information.
Distortion receptance function range value obtains module, and for obtaining audio signal, from loudspeaker to be transferred to microphone corresponding
It is distorted the range value of receptance function.
The range value of distortion receptance function obtains in the following manner: obtaining the received test audio signal of loudspeaker and wheat
Gram wind is received, by the corresponding test harmonic distortion signal of test audio signal；According to the intensity value of test audio signal and survey
The intensity value of harmonic distortion signal is tried, determines the range value of distortion receptance function.Specifically, above-mentioned calculating formula (3) be may refer to.
Harmonic distortion signal determining module is used to using harmonic distortion signal band information, be distorted the range value of receptance function
With the range value of transmission function, harmonic distortion signal is determined.
Cancellation module is also used to while eliminating echo signal from the second audio signal, harmonic carcellation distorted signal.
In one embodiment, harmonic distortion signal determining module is further used for being determined according to the range value of transmission function
The yield value or pad value of harmonic distortion signal band information；Yield value based on harmonic distortion signal band information declines
Depreciation is handled the corresponding signal of harmonic distortion signal band information using filter, the harmonic distortion that obtains that treated
The corresponding signal of signal band information；According to the range value of distortion receptance function, from treated, harmonic distortion signal frequency range is believed
It ceases and determines harmonic distortion signal in corresponding signal.Specifically, referring to above-mentioned calculating formula (4).
<example>
It according to Fig.5, is that the first electronic equipment and the second electronics are set respectively present example shows two electronic equipments
It is standby.It can be conversed using the party A-subscriber and the party B-subscriber using the second electronic equipment of the first electronic equipment.
When party A-subscriber speaks, the voice signal of party A-subscriber passes to the second electronic equipment by the microphone of the first electronic equipment
Left speaker and right loudspeaker.Left speaker and right loudspeaker are respectively formed two and return after the voice signal for playing party A-subscriber
Sound, two echoes have been superimposed the voice signal of party B-subscriber again from the microphone input of the second electronic equipment.At this point, A
User can hear the voice signal and two echo signals of party B-subscriber by the loudspeaker of the first electronic equipment.
In order to not influence speech quality, above-mentioned two echo signal is eliminated using the echo cancel method that this example provides.
The echo cancel method at least includes the following steps S501-S511.The echo cancel method is set by the second electronics
Standby implementation.The all parts that following steps include are the component in the second electronic equipment.
Step S501 obtains the voice signal S of the received party A-subscriber of left speakerl, the right received party A-subscriber of loudspeaker language
Sound signal SrWith the received audio signal S of microphone.
The voice signal S of the received party A-subscriber of left speakerlWith the voice signal S of the received party A-subscriber of right loudspeakerrFor ADC
Audio signal before converter conversion.
The received audio signal S of microphone is that microphone is received, the audio signal after DAC converter conversion.The sound
Frequency signal includes the voice signal of two echo signals and party B-subscriber.
Step S502, using the first delay compensation module and the second delay compensation module, A received to left speaker respectively
The voice signal S of userlCompensation of delay, which is carried out, with the voice signal of the received party A-subscriber of right loudspeaker handles Sr, respectively obtain processing
Signal S afterwardsl' and signal Sr’。
Step S503 obtains the amplitude that audio signal is transferred to corresponding first transmission function of microphone from left speaker
Value and audio signal are transferred to the range value of corresponding second transmission function of microphone from right loudspeaker.
Step S504 determines signal S according to the range value of the first transmission functionl' yield value or pad value, Yi Jigen
Signal S is determined according to the range value of the second transmission functionr' yield value or pad value.
Step S505 is based on signal Sl' yield value or pad value, using first filter to signal Sl' at
Reason, obtains the first echo signal SL is returned, and, it is based on signal Sr' yield value or pad value, using second filter to signal
Sr' handled, obtain the second echo signal S2 times。
Step S506 eliminates the first echo signal S from the received audio signal S of microphoneL is returned, obtain audio signal S1, then
From audio signal S1Eliminate the second echo signal S2 times, obtain audio signal S2。
Step S507 obtains harmonic distortion signal band information.
Step S508 is based on harmonic distortion signal band information, using the first low-pass filter, from voice signal Sl' cut
Take low frequency signal SL is low, and the second low-pass filter is utilized, from voice signal Sr' interception low frequency signal SR is low。
Step S509 obtains the width that audio signal is transferred to the corresponding first distortion receptance function of microphone from left speaker
Angle value and audio signal are transferred to the range value of the corresponding second distortion receptance function of microphone from loudspeaker.
Step S510, the range value of range value and the first transmission function based on the first distortion receptance function, utilizes first
Harmonic generation module, from low frequency signal SL is lowDetermine first harmonic distorted signal SL is humorous, and, based on the second distortion receptance function
The range value of range value and the second transmission function, using second harmonic generation module, from low frequency signal SR is lowDetermine that second harmonic loses
True signal SR is humorous。
Step S511, from audio signal S2Eliminate first harmonic distorted signal SL is humorous, obtain audio signal S3, then from audio believe
Second harmonic distorted signal S is eliminated in numberR is humorous, obtain audio signal S4。
Finally, by audio signal S4It is transferred in the first electronic equipment.
<electronic equipment embodiment>
In one embodiment, according to Fig.6, electronic equipment 2000 may include any embodiment according to the present invention
Echo cancelling device 4000, for implementing the echo cancel method of any embodiment of that present invention.
In another embodiment, electronic equipment 2000 may include processor 2100 and memory 2200.The memory
2200 for storing executable instruction, which, which is used to run electronic equipment 2000 according to the control of instruction, executes root
According to the echo cancel method of any embodiment of that present invention.
<computer readable storage medium>
In the present embodiment, a kind of computer readable storage medium is also provided, computer program, computer are stored thereon with
Program realizes the echo cancel method such as any embodiment of that present invention when being executed by processor.
The present invention can be system, method and/or computer program product.Computer program product may include computer
Readable storage medium storing program for executing, containing for making processor realize the computer-readable program instructions of various aspects of the invention.
Computer readable storage medium, which can be, can keep and store the tangible of the instruction used by instruction execution equipment
Equipment.Computer readable storage medium for example can be-- but it is not limited to-- storage device electric, magnetic storage apparatus, optical storage
Equipment, electric magnetic storage apparatus, semiconductor memory apparatus or above-mentioned any appropriate combination.Computer readable storage medium
More specific example (non exhaustive list) includes: portable computer diskette, hard disk, random access memory (RAM), read-only deposits
It is reservoir (ROM), erasable programmable read only memory (EPROM or flash memory), static random access memory (SRAM), portable
Compact disk read-only memory (CD-ROM), digital versatile disc (DVD), memory stick, floppy disk, mechanical coding equipment, for example thereon
It is stored with punch card or groove internal projection structure and the above-mentioned any appropriate combination of instruction.Calculating used herein above
Machine readable storage medium storing program for executing is not interpreted that instantaneous signal itself, the electromagnetic wave of such as radio wave or other Free propagations lead to
It crosses the electromagnetic wave (for example, the light pulse for passing through fiber optic cables) of waveguide or the propagation of other transmission mediums or is transmitted by electric wire
Electric signal.
Computer-readable program instructions as described herein can be downloaded to from computer readable storage medium it is each calculate/
Processing equipment, or outer computer or outer is downloaded to by network, such as internet, local area network, wide area network and/or wireless network
Portion stores equipment.Network may include copper transmission cable, optical fiber transmission, wireless transmission, router, firewall, interchanger, gateway
Computer and/or Edge Server.Adapter or network interface in each calculating/processing equipment are received from network to be counted
Calculation machine readable program instructions, and the computer-readable program instructions are forwarded, for the meter being stored in each calculating/processing equipment
In calculation machine readable storage medium storing program for executing.
Computer program instructions for executing operation of the present invention can be assembly instruction, instruction set architecture (ISA) instructs,
Machine instruction, machine-dependent instructions, microcode, firmware instructions, condition setup data or with one or more programming languages
The source code or object code that any combination is write, the programming language include the programming language-of object-oriented such as
Smalltalk, C++ etc., and conventional procedural programming languages-such as " C " language or similar programming language.Computer
Readable program instructions can be executed fully on the user computer, partly execute on the user computer, be only as one
Vertical software package executes, part executes on the remote computer or completely in remote computer on the user computer for part
Or it is executed on server.In situations involving remote computers, remote computer can pass through network-packet of any kind
It includes local area network (LAN) or wide area network (WAN)-is connected to subscriber computer, or, it may be connected to outer computer (such as benefit
It is connected with ISP by internet).In some embodiments, by utilizing computer-readable program instructions
Status information carry out personalized customization electronic circuit, such as programmable logic circuit, field programmable gate array (FPGA) or can
Programmed logic array (PLA) (PLA), the electronic circuit can execute computer-readable program instructions, to realize each side of the invention
Face.
Referring herein to according to the method for the embodiment of the present invention, the flow chart of device (system) and computer program product and/
Or block diagram describes various aspects of the invention.It should be appreciated that flowchart and or block diagram each box and flow chart and/
Or in block diagram each box combination, can be realized by computer-readable program instructions.
These computer-readable program instructions can be supplied to general purpose computer, special purpose computer or other programmable datas
The processor of processing unit, so that a kind of machine is produced, so that these instructions are passing through computer or other programmable datas
When the processor of processing unit executes, function specified in one or more boxes in implementation flow chart and/or block diagram is produced
The device of energy/movement.These computer-readable program instructions can also be stored in a computer-readable storage medium, these refer to
It enables so that computer, programmable data processing unit and/or other equipment work in a specific way, thus, it is stored with instruction
Computer-readable medium then includes a manufacture comprising in one or more boxes in implementation flow chart and/or block diagram
The instruction of the various aspects of defined function action.
Computer-readable program instructions can also be loaded into computer, other programmable data processing units or other
In equipment, so that series of operation steps are executed in computer, other programmable data processing units or other equipment, to produce
Raw computer implemented process, so that executed in computer, other programmable data processing units or other equipment
Instruct function action specified in one or more boxes in implementation flow chart and/or block diagram.
The flow chart and block diagram in the drawings show the system of multiple embodiments according to the present invention, method and computer journeys
The architecture, function and operation in the cards of sequence product.In this regard, each box in flowchart or block diagram can generation
One module of table, program segment or a part of instruction, the module, program segment or a part of instruction include one or more use
The executable instruction of the logic function as defined in realizing.In some implementations as replacements, function marked in the box
It can occur in a different order than that indicated in the drawings.For example, two continuous boxes can actually be held substantially in parallel
Row, they can also be executed in the opposite order sometimes, and this depends on the function involved.It is also noted that block diagram and/or
The combination of each box in flow chart and the box in block diagram and or flow chart, can the function as defined in executing or dynamic
The dedicated hardware based system made is realized, or can be realized using a combination of dedicated hardware and computer instructions.It is right
For those skilled in the art it is well known that, by hardware mode realize, by software mode realize and pass through software and
It is all of equal value that the mode of combination of hardware, which is realized,.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In the principle, practical application or technological improvement to the technology in market for best explaining each embodiment, or lead this technology
Other those of ordinary skill in domain can understand each embodiment disclosed herein.The scope of the present invention is limited by appended claims
It is fixed.
Claims (10)
1. a kind of echo cancel method characterized by comprising
Obtain received first audio signal of at least one loudspeaker and received second audio signal of microphone；
Compensation of delay processing is carried out to first audio signal, obtains third audio signal；
Obtain the range value that audio signal is transferred to the corresponding transmission function of the microphone from the loudspeaker；
Using the range value of the third audio signal and the transmission function, determine in second audio signal, by described
The echo signal that first audio signal generates；
The echo signal is eliminated from second audio signal.
2. the method according to claim 1, wherein the range value of the transmission function obtains in the following manner
:
Obtain that the received test audio signal of the loudspeaker and the microphone are received, are generated by the test audio signal
Test echo signal；
According to the intensity value of the intensity value of the test audio signal and the test echo signal, the transmission function is determined
Range value.
3. the method according to claim 1, wherein described utilize the third audio signal and the transmitting letter
Several range values determines in second audio signal, includes: by the echo signal that first audio signal generates
The yield value or pad value of the third audio signal are determined according to the range value of the transmission function；
Based on the yield value or pad value of the third audio signal, using filter to the third audio signal at
Reason, the third audio signal that obtains that treated, using as generating in first audio signal, by second audio signal
Echo signal.
4. the method according to claim 1, wherein the method also includes:
Obtain the harmonic distortion signal band information in the third audio signal；
Obtain the range value that the audio signal is transferred to the corresponding distortion receptance function of the microphone from the loudspeaker；
Utilize the amplitude of the harmonic distortion signal band information, the range value of the distortion receptance function and the transmission function
Value, determines harmonic distortion signal；
While eliminating the echo signal from second audio signal, the harmonic distortion signal is eliminated.
5. according to the method described in claim 4, it is characterized in that, it is described distortion receptance function range value in the following manner
It obtains:
Obtain that the received test audio signal of the loudspeaker and the microphone are received, are corresponded to by the test audio signal
Test harmonic distortion signal；
According to the intensity value of the intensity value of the test audio signal and the test harmonic distortion signal, determine that the distortion is rung
Answer the range value of function.
6. according to the method described in claim 5, it is characterized in that, the harmonic distortion signal includes at least second harmonic distortion
Signal and third harmonic distortion signal.
7. according to the method described in claim 4, it is characterized in that, described rung using the low-frequency distortion signal, the distortion
The range value of function and the range value of the transmission function are answered, determines that harmonic distortion signal includes:
The yield value or pad value of the harmonic distortion signal band information are determined according to the range value of the transmission function；
Based on the yield value or pad value of the harmonic distortion signal band information, the harmonic distortion is believed using filter
Number corresponding signal of band information is handled, the corresponding signal of harmonic distortion signal band information that obtains that treated；
According to the range value of the distortion receptance function, from treated the corresponding signal of harmonic distortion signal band information
The middle determination harmonic distortion signal.
8. a kind of echo cancelling device characterized by comprising
Audio signal obtains module, received for obtaining received first audio signal of at least one loudspeaker and microphone
Second audio signal；
Delay compensation module obtains third audio signal for carrying out compensation of delay processing to first audio signal；
Transmission function range value obtains module, and it is corresponding to be transferred to the microphone for obtaining audio signal from the loudspeaker
The range value of transmission function；
Echo signal determining module, for using the third audio signal and the transmission function range value, determine described in
The echo signal generated in second audio signal, by first audio signal；
Cancellation module, for eliminating the echo signal from second audio signal.
9. a kind of electronic equipment characterized by comprising memory and processor, the memory are for storing instruction, described
Instruction is operated for controlling the processor to execute method according to any one of claims 1-7.
10. a kind of computer readable storage medium, is stored thereon with computer program, the computer program is held by processor
Method according to any one of claims 1-7 is realized when row.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910683643.3A CN110310654A (en) | 2019-07-26 | 2019-07-26 | Echo cancel method and device, electronic equipment, readable storage medium storing program for executing |
| PCT/CN2019/108247 WO2021017134A1 (en) | 2019-07-26 | 2019-09-26 | Echo cancellation method and apparatus, electronic device, and readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910683643.3A CN110310654A (en) | 2019-07-26 | 2019-07-26 | Echo cancel method and device, electronic equipment, readable storage medium storing program for executing |
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| CN110310654A true CN110310654A (en) | 2019-10-08 |
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| WO (1) | WO2021017134A1 (en) |
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| WO2021017134A1 (en) * | 2019-07-26 | 2021-02-04 | 歌尔科技有限公司 | Echo cancellation method and apparatus, electronic device, and readable storage medium |
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| WO2021017134A1 (en) | 2021-02-04 |
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