CN112927708A - Method, device, equipment and storage medium for enhancing and suppressing residual acoustic echo - Google Patents
Method, device, equipment and storage medium for enhancing and suppressing residual acoustic echo Download PDFInfo
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- CN112927708A CN112927708A CN202110318662.3A CN202110318662A CN112927708A CN 112927708 A CN112927708 A CN 112927708A CN 202110318662 A CN202110318662 A CN 202110318662A CN 112927708 A CN112927708 A CN 112927708A
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- 238000004590 computer program Methods 0.000 claims description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
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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
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
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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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
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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
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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
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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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 embodiment of the invention provides a method for enhancing and suppressing residual acoustic echo, which is used for acquiring the signal intensity of a sound signal of a loudspeaker; judging whether the signal intensity of the sound signal of the loudspeaker is greater than a preset threshold value or not; judging whether the system is in a single-talk mode or not; tracking and acquiring the signal intensity of the residual acoustic echo signal after echo enhancement and suppression; setting a threshold value according to the acquired loudspeaker sound signal intensity, and comparing the residual acoustic echo signal intensity after echo enhancement and suppression with the set threshold value; and adjusting according to the type of the loudspeaker and the scene. Thus, the residual acoustic echo generated by the loudspeaker can be enhanced and suppressed, and the echo suppression effect and the sound emission quality of the loudspeaker are improved. In addition, the embodiment of the invention also provides an echo enhancement suppression device, equipment and a storage medium, which have the same beneficial effects.
Description
Technical Field
The present invention relates to the field of echo enhancement suppression technologies, and in particular, to a method, an apparatus, a device, and a storage medium for enhancing and suppressing a residual acoustic echo.
Background
Acoustic echo suppression (AEC) is a widely used technique that suppresses the sound picked up by a microphone and played by its own speaker by means of a reference signal provided by a speaker loop. If the acoustic echo is not suppressed or is not suppressed enough, one party of the two parties of the telephone conversation can continuously hear the delayed speech of the other party during the speaking process.
In the prior art, the inhibitory capacity of AEC is limited. In a well acoustically designed system, the AEC can also typically provide only 20-40dB suppression of acoustic echoes. However, in some scenarios where the speakers are large, even if the AEC is working properly, the residual echo is amplified by the large speakers to a level audible to the human ear, producing an audible echo.
In view of the above, how to provide a method, an apparatus, a device and a storage medium for residual acoustic echo enhancement suppression is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a method, a device, equipment and a storage medium for enhancing and inhibiting residual acoustic echo generated by a loudspeaker in the using process, so that the echo inhibiting effect and the sound playing quality of the loudspeaker are improved.
In order to solve the above technical problem, an embodiment of the present invention provides a method for suppressing enhancement of a residual acoustic echo, where the method includes: acquiring the signal intensity of a sound signal of a loudspeaker; judging whether the signal intensity of the sound signal of the loudspeaker is greater than a preset threshold value or not; if yes, carrying out echo enhancement suppression on the sound signal acquired by the sound acquisition equipment according to the sound signal intensity of the loudspeaker; and if not, canceling echo enhancement suppression.
Optionally, whether the system is in a single talk mode can be judged; if yes, continuing to execute echo enhancement suppression; and if not, canceling echo enhancement suppression.
Optionally, the signal strength of the residual acoustic echo signal after echo enhancement suppression may also be tracked; setting a threshold value according to the acquired loudspeaker sound signal intensity, and comparing the residual acoustic echo signal intensity after echo enhancement and suppression with the set threshold value; if the strength of the residual acoustic echo signal after echo enhancement and suppression is larger than the set threshold value, further increasing echo enhancement and suppression; and if the strength of the residual acoustic echo signal after echo enhancement and suppression is smaller than the set threshold value, continuing to execute the original echo enhancement and suppression.
Optionally, the preset threshold may be adjusted according to the type of the speaker and the scene where the speaker is located.
The embodiment of the invention correspondingly provides a device for enhancing and suppressing the residual acoustic echo, which comprises: the acquisition module is used for acquiring the sound signals acquired by the sound acquisition equipment and the sound signals of the loudspeaker; the judging module is used for judging whether the signal intensity of the sound signal of the loudspeaker is greater than a preset threshold value or not; the processing module is used for carrying out echo enhancement suppression on the sound signal of the loudspeaker;
optionally, the obtaining module of the residual acoustic echo enhancement suppressing apparatus is further configured to obtain a residual acoustic echo signal after echo enhancement suppression; the judging module is further configured to judge whether a residual acoustic echo signal after echo enhancement and suppression is greater than a set threshold value; the processing module is further configured to process the residual acoustic echo signal after echo enhancement suppression.
The embodiment of the invention also provides a device for enhancing and suppressing the residual acoustic echo, which comprises a memory and a processor. Wherein: the memory for storing a computer program; the processor is configured to perform the residual acoustic echo enhancement suppression method as described above.
Optionally, the residual acoustic echo enhancement suppression device further includes a speaker and a sound collection device, where the speaker and the sound collection device are external devices.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the method for suppressing residual acoustic echo enhancement is implemented as described above.
The embodiment of the invention provides a method for enhancing and suppressing residual acoustic echo, which is used for acquiring the signal intensity of a sound signal of a loudspeaker; judging whether the signal intensity of the sound signal of the loudspeaker is greater than a preset threshold value or not; if yes, carrying out echo enhancement suppression on the sound signal acquired by the sound acquisition equipment according to the sound signal intensity of the loudspeaker; and if not, canceling echo enhancement suppression. Judging whether the system is in a single-talk mode or not; if yes, continuing to execute echo enhancement suppression; and if not, canceling echo enhancement suppression. Tracking and acquiring the signal intensity of the residual acoustic echo signal after echo enhancement and suppression; setting a threshold value according to the acquired loudspeaker sound signal intensity, and comparing the residual acoustic echo signal intensity after echo enhancement and suppression with the set threshold value; if the strength of the residual acoustic echo signal after echo enhancement and suppression is larger than the set threshold value, further increasing echo enhancement and suppression; and if the strength of the residual acoustic echo signal after echo enhancement and suppression is smaller than the set threshold value, continuing to execute the original echo enhancement and suppression. And adjusting according to the type of the loudspeaker and the scene. By the method, residual acoustic echo generated by the loudspeaker can be enhanced and suppressed in the using process, and the echo suppression effect and the sound emission quality of the loudspeaker are improved. In addition, the embodiment of the invention also provides an echo enhancement suppression device, equipment and a storage medium, which have the same beneficial effects.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flowchart of an echo enhancement suppression method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a framework of an echo enhancement suppression device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an echo enhancement suppression device according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention aims to provide a method, a device, equipment and a storage medium for enhancing and suppressing residual acoustic echo, which can enhance and suppress the residual acoustic echo generated by a loudspeaker in the using process and improve the echo suppression effect and the sound amplification quality of the loudspeaker.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a flowchart illustrating an echo enhancement suppression method according to an embodiment of the present invention. Applications are in acoustic systems, e.g. smart speakers, etc. In a hands-free conversation scenario, a smart speaker is used in a telephony scenario, since the smart speaker is usually equipped with a relatively large speaker, AEC works normally, but residual echo is amplified by the large speaker of the speaker to a level audible to the human ear, producing audible echo. Referring to fig. 1, the method includes:
s110: acquiring the signal intensity of a sound signal of a loudspeaker;
s120: judging whether the signal intensity of the sound signal of the loudspeaker is greater than a preset threshold value or not; if yes, carrying out echo enhancement suppression on the sound signal acquired by the sound acquisition equipment according to the sound signal intensity of the loudspeaker; and if not, canceling echo enhancement suppression.
The preset threshold in this embodiment may be 75dB, and of course, the specific value may be adjusted according to different actual products, which is not particularly limited in this application.
S130: judging whether the system is in a single-talk mode or not; if yes, continuing to execute echo enhancement suppression; and if not, canceling echo enhancement suppression.
It should be noted that in a specific application, when the system is in a two-way call, if echo enhancement suppression is enabled, the call quality will be directly affected, resulting in problems of noise, noise elimination, and the like. Therefore, it is effective and feasible to determine whether the system is in the talk-once mode to determine whether to turn on echo enhancement suppression.
S140: setting a threshold value according to the acquired loudspeaker sound signal intensity, and comparing the residual acoustic echo signal intensity after echo enhancement and suppression with the set threshold value; if the strength of the residual acoustic echo signal after echo enhancement and suppression is larger than the set threshold value, further increasing echo enhancement and suppression; and if the strength of the residual acoustic echo signal after echo enhancement and suppression is smaller than the set threshold value, continuing to execute the original echo enhancement and suppression.
The threshold value set in this embodiment may be 10dB, and of course, the specific value may be adjusted according to different actual products, which is not particularly limited in this application.
It should be noted that, after obtaining the sound signal after echo enhancement and suppression, the sound signal may be sent to other audio processing modules for corresponding processing, or may also be sent out directly, and specifically, the subsequent operation may be performed according to actual conditions. It should be noted that, in the present embodiment, even if the preset threshold is the same product, the preset threshold may be automatically or manually adjusted according to different situations of a scene or a place where the product is located.
In summary, the embodiment of the present invention provides a method for enhancing and suppressing a residual acoustic echo, which obtains a signal strength of a sound signal of a speaker; judging whether the signal intensity of the sound signal of the loudspeaker is greater than a preset threshold value or not; if yes, carrying out echo enhancement suppression on the sound signal acquired by the sound acquisition equipment according to the sound signal intensity of the loudspeaker; and if not, canceling echo enhancement suppression. Judging whether the system is in a single-talk mode or not; if yes, continuing to execute echo enhancement suppression; and if not, canceling echo enhancement suppression. Tracking and acquiring the signal intensity of the residual acoustic echo signal after echo enhancement and suppression; setting a threshold value according to the acquired loudspeaker sound signal intensity, and comparing the residual acoustic echo signal intensity after echo enhancement and suppression with the set threshold value; if the strength of the residual acoustic echo signal after echo enhancement and suppression is larger than the set threshold value, further increasing echo enhancement and suppression; and if the strength of the residual acoustic echo signal after echo enhancement and suppression is smaller than the set threshold value, continuing to execute the original echo enhancement and suppression. And adjusting according to the type of the loudspeaker and the scene. By the method, residual acoustic echo generated by the loudspeaker can be enhanced and suppressed in the using process, and the echo suppression effect and the sound emission quality of the loudspeaker are improved.
Example two
Fig. 2 is a schematic diagram of a framework of an echo enhancement suppression device according to an embodiment of the present invention. On the basis of the foregoing embodiments, an echo enhancement suppressing apparatus is correspondingly provided in an embodiment of the present invention, please refer to fig. 2. The device includes: an acquisition module 21, a judgment module 22 and a processing module 23. Wherein,
the acquiring module 21 is configured to acquire a sound signal acquired by the sound acquiring device and a sound signal of the speaker;
the judging module 22 is configured to judge whether the signal intensity of the sound signal of the speaker is greater than a preset threshold;
and the processing module 23 is configured to perform echo enhancement suppression on the speaker sound signal.
Optionally: and the acquisition module is further used for acquiring the residual acoustic echo signal after echo enhancement suppression.
Optionally: and the judging module is also used for judging whether the residual acoustic echo signal after echo enhancement and suppression is larger than a set threshold value.
Optionally: and the processing module is further used for processing the residual acoustic echo signal after the echo enhancement suppression.
It should be noted that the echo enhancement suppression device provided in the embodiment of the present invention has the same beneficial effects as the echo enhancement suppression method provided in the above embodiment, and for the specific description of the echo enhancement suppression method in the embodiment, please refer to the above method embodiment, which is not described herein again.
EXAMPLE III
Fig. 3 is a schematic structural diagram of an echo enhancement suppression device according to an embodiment of the present invention. On the basis of the above embodiments, please refer to fig. 3. The embodiment of the present invention further provides an echo enhancement suppression device, which includes a memory 31 and a processor 32, wherein:
a memory 31 for storing a computer program;
a processor 32 for implementing the steps of the echo enhancement suppression method as described above when executing the computer program.
Further, the echo enhancement suppression device further comprises a loudspeaker 33 and a sound collection device 34, wherein the loudspeaker and the sound collection device are external devices.
On the basis of the foregoing embodiments, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the echo enhancement suppression method as described above.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of residual acoustic echo enhancement suppression, the method comprising:
acquiring the signal intensity of a sound signal of a loudspeaker;
judging whether the signal intensity of the sound signal of the loudspeaker is greater than a preset threshold value or not;
if yes, carrying out echo enhancement suppression on the sound signal acquired by the sound acquisition equipment according to the sound signal intensity of the loudspeaker;
and if not, canceling echo enhancement suppression.
2. The residual acoustic echo enhancement suppression method according to claim 1, further comprising:
judging whether the system is in a single-talk mode or not;
if yes, continuing to execute echo enhancement suppression;
and if not, canceling echo enhancement suppression.
3. The residual acoustic echo enhancement suppression method according to claim 2, further comprising:
and tracking and acquiring the signal strength of the residual acoustic echo signal after echo enhancement suppression.
4. The residual acoustic echo enhancement suppression method according to claim 3, further comprising:
setting a threshold value according to the acquired loudspeaker sound signal intensity,
comparing the strength of the residual acoustic echo signal after echo enhancement and suppression with the set threshold value;
if the strength of the residual acoustic echo signal after echo enhancement and suppression is larger than the set threshold value, further increasing echo enhancement and suppression;
and if the strength of the residual acoustic echo signal after echo enhancement and suppression is smaller than the set threshold value, continuing to execute the original echo enhancement and suppression.
5. The method according to any of claims 1 to 4, wherein the preset threshold is adjustable according to the speaker type and the scene where the speaker is located.
6. A residual acoustic echo enhancement suppression device, characterized in that said device comprises:
the acquisition module is used for acquiring the sound signals acquired by the sound acquisition equipment and the sound signals of the loudspeaker;
the judging module is used for judging whether the signal intensity of the sound signal of the loudspeaker is greater than a preset threshold value or not;
and the processing module is used for carrying out echo enhancement suppression on the sound signal of the loudspeaker.
7. The residual acoustic echo enhancement suppression device according to claim 6,
the acquisition module is further configured to acquire a residual acoustic echo signal after echo enhancement suppression;
the judging module is further configured to judge whether a residual acoustic echo signal after echo enhancement and suppression is greater than a set threshold value;
the processing module is further configured to process the residual acoustic echo signal after echo enhancement suppression.
8. A residual acoustic echo enhancement suppression device comprising a memory, a processor; wherein:
the memory for storing a computer program;
the processor, configured to implement the method of residual acoustic echo enhancement suppression according to any one of claims 1 to 5 when executing the computer program.
9. The residual acoustic echo enhancement suppression device according to claim 8, further comprising a speaker and a sound collection device, wherein the speaker and the sound collection device are external devices.
10. A storage medium having stored thereon a computer program which, when executed by a processor, implements the echo-enhancement suppression method according to any one of claims 1 to 5.
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| CN109524018A (en) * | 2017-09-19 | 2019-03-26 | 华为技术有限公司 | A kind of echo processing method and equipment |
| CN111556210A (en) * | 2020-04-23 | 2020-08-18 | 深圳市未艾智能有限公司 | Call voice processing method and device, terminal equipment and storage medium |
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2021
- 2021-03-25 CN CN202110318662.3A patent/CN112927708A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| JP2007053511A (en) * | 2005-08-17 | 2007-03-01 | Sony Corp | Speech processing device and microphone apparatus |
| CN106849976A (en) * | 2016-12-28 | 2017-06-13 | 深圳天珑无线科技有限公司 | Echo cancel method and communication terminal during a kind of hand-free call |
| CN109524018A (en) * | 2017-09-19 | 2019-03-26 | 华为技术有限公司 | A kind of echo processing method and equipment |
| CN109040500A (en) * | 2018-08-28 | 2018-12-18 | 歌尔科技有限公司 | Echo cancel method, device, ear speaker device and computer readable storage medium |
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