CN111683319A - Call pickup noise reduction method, earphone and storage medium - Google Patents
Call pickup noise reduction method, earphone and storage medium Download PDFInfo
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- CN111683319A CN111683319A CN202010512627.0A CN202010512627A CN111683319A CN 111683319 A CN111683319 A CN 111683319A CN 202010512627 A CN202010512627 A CN 202010512627A CN 111683319 A CN111683319 A CN 111683319A
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- 230000015572 biosynthetic process Effects 0.000 claims abstract description 20
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 20
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 7
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- 238000007781 pre-processing Methods 0.000 claims description 5
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- 230000007613 environmental effect Effects 0.000 description 3
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient 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
- 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
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
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Abstract
The invention relates to the technical field of earphones, and discloses a method for picking up and reducing noise in a call, an earphone and a storage medium. The method is applied to the pickup equipment which is provided with a microphone and a voice acceleration sensor at the same time; the method comprises the following steps: acquiring a first sound signal through a voice acceleration sensor, and acquiring a second sound signal through a microphone; and synthesizing the first sound signal and the second sound signal to obtain a third sound signal. The earphone includes: the voice acceleration sensor is used for collecting a first sound signal; the microphone is used for acquiring a second sound signal; and the signal synthesis module is used for synthesizing the first sound signal and the second sound signal to obtain a third sound signal. According to the embodiment of the invention, the voice acceleration sensor and the microphone are combined and applied, the sound signals picked up by the voice acceleration sensor and the microphone are synthesized, and the synthesized signal is output to the opposite end, so that the signal-to-noise ratio and distortion of the sound of the wearer heard by a conversation object in conversation with the wearer are obviously optimized.
Description
Technical Field
The invention relates to the technical field of earphones, in particular to a method for picking up and reducing noise in a call, an earphone and a storage medium.
Background
With the progress of society and the improvement of the level of science and technology, more and more people begin to pay attention to the improvement of life quality, more and more people begin to use some audio-visual products, such as smart phones and wireless earphones, and the products greatly facilitate the life of human beings and also provide more fun for the human beings. Especially, the bluetooth headset, the user can liberate both hands completely to communicate with other people and enjoy music without constraint, so the wireless headset is popular with more and more users.
In recent years, a TWS (True Wireless Stereo) headset is preferred by most users, and the TWS headset is a device for transmitting Stereo signals based on bluetooth technology, that is, left and right headsets can receive Stereo signals from an electronic playing device such as a mobile phone through bluetooth without any wire connection, so as to realize playback.
At present, the dual-microphone noise reduction technology applied to the TWS headset is mainly implemented by algorithms such as beam forming, AEC acoustic echo cancellation, AGC gain control, and the like, and although the noise reduction technology obtains a certain noise reduction effect, environmental sounds except the voice of the caller can still be picked up and the total harmonic distortion of the low-frequency part of the voice of the caller is high, so that the noise reduction effect still needs to be improved urgently.
Disclosure of Invention
The invention aims to provide a method for picking up and reducing noise in a call, an earphone and a storage medium, which solve the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a call pickup method is applied to pickup equipment which is provided with a microphone and a voice acceleration sensor simultaneously; the method comprises the following steps:
acquiring a first sound signal through the voice acceleration sensor, and acquiring a second sound signal through a microphone;
and synthesizing the first sound signal and the second sound signal to obtain a third sound signal.
Optionally, before acquiring the first sound signal and the second sound signal, the method further includes the steps of:
through pronunciation acceleration sensor carries out pronunciation liveness monitoring, is monitoring when the person of wearing of pickup equipment speaks, opens the microphone carries out the collection of second sound signal.
Optionally, in the process of the synthesis processing, the low-frequency component in the first sound signal is provided as the low-frequency component of the third sound signal; and simultaneously, according to the low-frequency component in the first sound signal, performing signal synthesis noise reduction processing on the high-frequency component in the second sound signal.
Optionally, before the synthesizing process of the first sound signal and the second sound signal, the method further includes: and performing beam forming processing and acoustic echo cancellation processing on the second sound signal.
Optionally, before the synthesizing process of the first sound signal and the second sound signal, the method further includes: and carrying out filtering and amplifying processing on the first sound signal.
An earphone, comprising:
the voice acceleration sensor is used for collecting a first sound signal;
the microphone is used for acquiring a second sound signal;
and the signal synthesis module is used for synthesizing the first sound signal and the second sound signal to obtain a third sound signal.
Optionally, the system further comprises a control module;
the voice acceleration sensor is also used for monitoring voice activity, and informing the control module when monitoring that a wearer of the earphone produces voice;
and the control module is used for starting the microphone to collect the second sound signal when the voice acceleration sensor monitors that the wearer of the earphone produces sound.
Optionally, the signal synthesizing module is specifically configured to, during the synthesizing process: providing low frequency components in the first sound signal as low frequency components of the third sound signal; and simultaneously, according to the low-frequency component in the first sound signal, performing signal synthesis noise reduction processing on the high-frequency component in the second sound signal.
Optionally, the apparatus further includes a signal preprocessing module, configured to perform beamforming processing and acoustic echo cancellation processing on the second sound signal before the synthesis processing, and perform filtering and amplification processing on the first sound signal.
A storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the steps of the call pickup method as described in any one of the above.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
compared with the traditional mode, the embodiment of the invention combines and applies the voice acceleration sensor and the microphone, synthesizes the sound signals picked up by the voice acceleration sensor and the microphone, and outputs the synthesized signal to the opposite end, so that the signal-to-noise ratio and distortion of the sound of the wearer heard by the talking object talking with the wearer are obviously optimized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart of a call pickup noise reduction method according to an embodiment of the present invention.
Fig. 2 is a schematic block diagram of a call sound pickup and noise reduction method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a method for reducing noise in a call pickup, which is suitable for a pickup apparatus having a microphone and a voice acceleration sensor, and specifically includes the following steps:
step S101, Voice Activity Detection (VAD) is performed through a Voice acceleration sensor, and when it is detected that a user wearing the sound pickup device speaks, a microphone is turned on.
Through VAD technology, whether the wearer of the pickup equipment speaks or not, namely whether a sound signal is emitted or not can be monitored. In the step, when the condition that the wearer speaks is monitored, the microphone is started to pick up sound, and when the wearer does not speak, the microphone is closed, so that the situation that environmental sound is not picked up when the wearer does not speak can be ensured, and the quality of signals picked up by a conversation object in conversation with the wearer is improved.
Step S102, a first sound signal is collected through a voice acceleration sensor, a second sound signal is collected through a microphone, and corresponding preprocessing is carried out on the first sound signal and the second sound signal.
And carrying out filtering processing on the first sound signal, and filtering out specific waveband frequencies in the first sound signal so as to achieve the purpose of suppressing and preventing interference.
For the second sound signal, beamforming processing and Acoustic echo cancellation processing (AEC) are performed.
The basic principles of acoustic echo cancellation processing are: the voice signal of the conversation object which is from the conversation with the wearer in the descending audio frequency is extracted to be used as echo cancellation reference, the echo signal contained in the second voice signal is measured and calculated through algorithm modules such as an adaptive filter and the like and is cancelled, and other useful voice signals are reserved.
The basic principle of acoustic beamforming is: two microphones arranged in an end-fire manner are subjected to voice extraction or separation by referring to the difference of the first microphone and the second microphone in time delay and phase, forming a main pickup lobe along the axial direction of the first microphone through algorithm processing, and inhibiting the sounds in other directions:
and step S103, synthesizing the first sound signal and the second sound signal to obtain a third sound signal and outputting the third sound signal.
The synthesis treatment method specifically comprises the following steps: providing the low frequency component in the first sound signal as the low frequency component of the third sound signal; and simultaneously, carrying out noise reduction processing on the high-frequency component in the second sound signal according to the low-frequency component in the first sound signal.
Since the signal-to-noise ratio and the total harmonic distortion of the low-frequency component of the sound signal picked up by the voice acceleration sensor are superior to those of the sound signal picked up by the microphone, the low-frequency component of the sound signal picked up by the voice acceleration sensor is used for the final synthesis of the sound signal of the wearer, and the noise reduction and optimization of the low frequency of the voice are realized.
Meanwhile, because the sound emitted by the same voice signal source (like a wearer) has larger correlation between the high-frequency component variation trend and the low-frequency component variation trend, the high-frequency part of the voice of the wearer in the second voice signal can be extracted by utilizing the processed first voice signal through the specific algorithm module according to the characteristic, and the voice restoration with high signal-to-noise ratio is realized.
Correspondingly, the embodiment of the invention also provides an earphone, which comprises: the device comprises a voice acceleration sensor, a microphone, a signal synthesis module, a control module and a signal preprocessing module.
The voice acceleration sensor is used for collecting a first sound signal; the earphone is also used for monitoring voice activity, and when the condition that the wearer of the earphone speaks is monitored, the control module is informed.
And the switch of the microphone is controlled by the control module and is used for acquiring the second sound signal.
And the signal synthesis module is used for synthesizing the first sound signal and the second sound signal to obtain a third sound signal. The signal synthesis module is specifically configured to, during synthesis processing: providing the low frequency component in the first sound signal as the low frequency component of the third sound signal; and simultaneously, carrying out noise reduction processing on the high-frequency component in the second sound signal according to the low-frequency component in the first sound signal.
And the control module is used for starting the microphone to collect a second sound signal when the voice acceleration sensor monitors that the wearer of the earphone speaks.
And the signal preprocessing module is used for performing beam forming processing and acoustic echo cancellation processing on the second sound signal and performing filtering amplification processing on the first sound signal before the synthesis processing.
In summary, the sound pickup scheme provided by the embodiment can realize that a communicating object communicating with a wearer cannot hear any environmental noise when the wearer does not speak in a scene where the wearer uses a bluetooth headset to communicate in a noisy environment; further, when the wearer speaks, the signal-to-noise ratio and distortion of the wearer's voice heard by the call partner with which the wearer talks are not significantly deteriorated, and the ambient noise is hardly heard.
It will be understood by those skilled in the art that all or part of the steps of the above-described call sound pickup and noise reduction method may be implemented by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor.
To this end, embodiments of the present application further provide a storage medium, where a plurality of instructions are stored, where the instructions can be loaded by a processor to execute the steps in the call sound pickup and noise reduction method provided in the embodiments of the present application.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A call pickup noise reduction method is characterized in that the method is applied to pickup equipment which is provided with a microphone and a voice acceleration sensor simultaneously; the method comprises the following steps:
acquiring a first sound signal through the voice acceleration sensor, and acquiring a second sound signal through a microphone;
and synthesizing the first sound signal and the second sound signal to obtain a third sound signal.
2. The method of claim 1, further comprising, before the step of collecting the first sound signal and the second sound signal:
through pronunciation acceleration sensor carries out pronunciation liveness monitoring, is monitoring when the person of wearing of pickup equipment speaks, opens the microphone carries out the collection of second sound signal.
3. The method for picking up and reducing noise in a call according to claim 1, wherein in the process of the synthesis processing, a low frequency component in the first sound signal is provided as a low frequency component in the third sound signal; and simultaneously, according to the low-frequency component in the first sound signal, performing signal synthesis noise reduction processing on the high-frequency component in the second sound signal.
4. The method of claim 1, further comprising, before the synthesizing the first sound signal and the second sound signal: and performing beam forming processing and acoustic echo cancellation processing on the second sound signal.
5. The method of claim 1, further comprising, before the synthesizing the first sound signal and the second sound signal: and carrying out filtering and amplifying processing on the first sound signal.
6. An earphone, comprising:
the voice acceleration sensor is used for collecting a first sound signal;
the microphone is used for acquiring a second sound signal;
and the signal synthesis module is used for synthesizing the first sound signal and the second sound signal to obtain a third sound signal.
7. The headset of claim 6, further comprising a control module;
the voice acceleration sensor is also used for monitoring voice activity, and informing the control module when monitoring that a wearer of the earphone produces voice;
and the control module is used for starting the microphone to collect the second sound signal when the voice acceleration sensor monitors that the wearer of the earphone produces sound.
8. The headset of claim 6, wherein the signal synthesis module, during the synthesis process, is specifically configured to: providing low frequency components in the first sound signal as low frequency components of the third sound signal; and simultaneously, according to the low-frequency component in the first sound signal, performing signal synthesis noise reduction processing on the high-frequency component in the second sound signal.
9. The headphone of claim 6, further comprising a signal preprocessing module, configured to perform a beamforming process and an acoustic echo cancellation process on the second sound signal and perform a filtering amplification process on the first sound signal before the synthesis process.
10. A storage medium storing instructions adapted to be loaded by a processor to perform the steps of the method according to any one of claims 1 to 5.
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| CN202010512627.0A CN111683319A (en) | 2020-06-08 | 2020-06-08 | Call pickup noise reduction method, earphone and storage medium |
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| CN202010512627.0A CN111683319A (en) | 2020-06-08 | 2020-06-08 | Call pickup noise reduction method, earphone and storage medium |
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Cited By (7)
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| CN112929777A (en) * | 2021-02-05 | 2021-06-08 | 英华达（上海）科技有限公司 | Audio signal processing method and device and electronic equipment |
| CN113259799A (en) * | 2021-04-23 | 2021-08-13 | 深圳市豪恩声学股份有限公司 | Blocking effect optimization method, device, equipment and storage medium |
| CN113345455A (en) * | 2021-06-02 | 2021-09-03 | 云知声智能科技股份有限公司 | Wearable device voice signal processing device and method |
| CN113411715A (en) * | 2021-07-05 | 2021-09-17 | 歌尔科技有限公司 | Prompting method for speaking sound volume, earphone and readable storage medium |
| CN114666445A (en) * | 2022-02-25 | 2022-06-24 | 华为技术有限公司 | Communication method and communication device |
| CN115223582A (en) * | 2021-12-16 | 2022-10-21 | 广州汽车集团股份有限公司 | Audio noise processing method, system, electronic device and medium |
| EP4266705A1 (en) * | 2022-04-20 | 2023-10-25 | Absolute Audio Labs B.V. | Audio processing method for a wearable auto device |
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Application publication date: 20200918 |