CN111491228A - Noise reduction earphone and control method thereof - Google Patents

Noise reduction earphone and control method thereof Download PDF

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Publication number
CN111491228A
CN111491228A CN201910087052.XA CN201910087052A CN111491228A CN 111491228 A CN111491228 A CN 111491228A CN 201910087052 A CN201910087052 A CN 201910087052A CN 111491228 A CN111491228 A CN 111491228A
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China
Prior art keywords
noise reduction
state
sound
signal
call
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CN201910087052.XA
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Chinese (zh)
Inventor
刘�东
彭定桃
谢腾
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Anker Innovations Co Ltd
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Anker Innovations Co Ltd
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Priority to CN201910087052.XA priority Critical patent/CN111491228A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/10Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083Reduction of ambient noise

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Function (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The invention discloses a noise reduction earphone and a control method thereof. Wherein, this noise reduction earphone includes: the microphone array comprises at least two microphones and is used for collecting user voice and ambient environment sound I; the digital signal processor is connected with the microphone array and used for filtering and denoising the user voice and the ambient environment sound I to obtain a processing signal and transmitting the processing signal to the control module; and the wireless module is connected with the control module and used for transmitting the processing signal to the target terminal through a wireless frequency band. The invention solves the technical problem that the earphone in the related technology can not adapt to the situation of more ambient noise under the complex environment, so that the experience of a user for using the earphone is reduced.

Description

Noise reduction earphone and control method thereof
Technical Field
The invention relates to the field of electronic equipment, in particular to a noise reduction earphone and a control method thereof.
Background
In the related art, for a stereo bluetooth headset, generally, only 1 microphone MIC and 2 speakers (or receiver) are needed, and the headset can keep operations such as calling, listening to music and the like under an environment with fewer people and reduced interference, but cannot effectively reduce noise under the conditions of complex environment and more people, so that more noises in the sound emitted by a speaker of the headset are caused, and a user often cannot hear the sound emitted by a terminal connected with the bluetooth headset or hear more noises, thereby affecting the use of the headset by the user and also reducing the interest of the user in using the headset.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a noise reduction earphone and a control method thereof, which at least solve the technical problem that the experience of a user for using the earphone is reduced because the earphone in the related technology cannot adapt to the situation of more ambient noise under the complex environment.
According to an aspect of an embodiment of the present invention, there is provided a noise reduction headphone including: the microphone array comprises at least two microphones and is used for collecting user voice and ambient environment sound I; the digital signal processor is connected with the microphone array and used for filtering and denoising the user voice and the ambient environment sound I to obtain a processing signal and transmitting the processing signal to the control module; and the wireless module is connected with the control module and used for transmitting the processing signal to a target terminal through a wireless frequency band.
Further, the working state of the noise reduction earphone is in a call uplink state, wherein the call uplink state indicates that the noise reduction earphone is in an uplink state in a call mode.
Further, the digital signal processor is further configured to perform optimization processing on downlink data sent by the target terminal when the noise reduction earphone is in a call downlink state or a music listening state, so as to obtain an optimized signal, where the call downlink state is a downlink state in which the noise reduction earphone is in a call mode; the noise reducing headphone further comprises: the feedback microphone module is used for collecting the sound II of the surrounding environment when the noise reduction earphone is in a call downlink state or a music listening state; and the active noise reduction module is connected with the feedback microphone module and is used for actively reducing noise of the second ambient sound, superposing the sound signal subjected to the active noise reduction processing on the optimized signal to obtain an optimized superposed signal, and sending the optimized superposed signal through a preset loudspeaker to offset the second ambient sound.
Further, the wireless module is a bluetooth module, is wirelessly connected with the target terminal, and is configured to receive downlink data sent by the target terminal when the noise reduction earphone is in a call downlink state or a music listening state; and/or, the noise reducing headphone further comprises: and the adapter interface is in wired connection with the target terminal through a preset adapter cable and is used for receiving downlink data sent by the target terminal when the noise reduction earphone is in an analog audio signal input state.
Further, the digital signal processor includes: and the first processing module is used for performing noise elimination processing on the received ambient environment sound I when the noise reduction earphone is in a call uplink state, and sending a processed sound signal to the control module through an integrated circuit built-in audio bus I2S.
Further, the digital signal processor further comprises: and the second processing module is used for processing the sound of a target microphone and transmitting the sound signal to the third processing module when the noise reduction earphone is in a call downlink state or a music listening state, wherein the third processing module outputs the processed sound signal through a digital-to-analog converter after processing the sound.
According to another aspect of the embodiments of the present invention, there is also provided a method for controlling a noise reduction headphone, including: when the noise reduction earphone is in a call uplink state, acquiring user voice and ambient environment sound I, wherein the call uplink state indicates that the noise reduction earphone is in an uplink state of a call mode; filtering and denoising the user voice and the ambient environment sound I to obtain a processed signal; and transmitting the processing signal to a target terminal through a wireless frequency band.
Further, the control state of the noise reduction headphone further includes: a call down state, a music listening state and an analog audio signal input state.
Further, the control method further includes: collecting a second ambient sound when the noise reduction earphone is in a call downlink state or a music listening state; optimizing downlink data sent by the target terminal to obtain an optimized signal; and actively denoising the second ambient sound, superposing the sound signal subjected to the active denoising to the optimized signal to obtain an optimized superposed signal, and sending the optimized superposed signal through a preset loudspeaker to offset the second ambient sound.
Further, the active noise reduction processing on the second ambient sound includes: and carrying out amplification processing, filtering processing and phase inversion processing on the second ambient sound.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium for storing a program, wherein the program, when executed by a processor, controls a device in which the storage medium is located to execute the control method of the noise reduction headphone described in any one of the above.
In the embodiment of the invention, the voice of a user and the sound of the surrounding environment are received by the microphone array, then the voice and the sound of the surrounding environment are sent to the digital signal processor for digital filtering and noise reduction, the processed signal is sent to the control module, and the control module is transmitted to the target terminal through the wireless frequency band and finally transmitted to the opposite side of the call. In this embodiment, can adopt a plurality of microphones to carry out the collection of sound signal, the mode of gathering sound is more, then carry out effectual noise reduction processing through digital signal processor, let the user all have very good noise reduction effect in modes such as any environment conversation and listening music, just so can realize normally and far-end conversation under abominable noise environment, user experience has greatly been promoted, and then the earphone among the solution correlation technique can't adapt to the more condition of surrounding noise under the environment complicacy, lead to the technical problem that the user uses the experience degree of earphone to reduce.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of an alternative noise reducing headphone according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative digital signal processor according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an alternative noise reduction headphone according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
To facilitate the understanding of the present invention, some terms or nouns related to the embodiments of the present invention are explained below:
PMU, Power management unit.
UART, Universal Asynchronous Receiver/Transmitter.
GPIO, General Purpose Input/Output.
L DO, low dropout regulator.
MPU, Microprocessor unit, Microprocessor.
MCU, Microcontroller Unit, Microcontroller.
DSP, Digital Signal Processor.
Type-C,USB Type C。
Spk, Statistical Process Control, speakers, SPK-L and SPK-R represent the left and right loudspeakers.
SPEAKER, horn.
MIC, Microphone.
BT SOC, indicating BT chip.
Audio, Audio.
ANC, Active Noise cancellation, it produces the opposite phase sound wave equal to external Noise through the Noise reduction system, neutralizes the Noise, thus realizes the effect of making an uproar. The noise reduction effect is realized through three modes of feedforward, feedback or front + feedback.
I2S, Inter-IC Sound, Integrated Circuit built-in Audio bus.
I2C, bidirectional two-wire synchronous serial bus.
DAC, Digital to Analog Converter.
EQ, equalizer.
Sidetone, sidetone.
Battery, or accumulator.
ANC Circuit, active noise reduction.
The following embodiments of the present invention may be applied to an earphone, the Type of the earphone is not specifically limited in the present invention, and the present invention is described with a wireless bluetooth earphone, and the earphone may be wirelessly connected to a terminal device/other audio devices, and may also be wired connected to the terminal device/other audio devices through a transfer interface (such as a Type C interface or a USB interface).
The embodiment of the invention relates to uplink microphone (namely uplink MIC) noise reduction and downlink active noise reduction in a call mode, wherein when the uplink MIC noise reduction is carried out, the sound of a terminal holder is collected through a microphone, and then noise in the surrounding environment is processed to realize the uplink noise reduction; when the downlink active noise reduction is performed, external environment noise is collected through a feedback microphone, processed and fed back to a loudspeaker (namely SPK), and then noise reduction is achieved through an active noise reduction module. The invention is illustrated below by means of various examples.
Fig. 1 is a schematic diagram of an alternative noise reduction headphone according to an embodiment of the present invention, as shown in fig. 1, the noise reduction headphone may include: the system comprises a microphone array (101), a digital signal processor (102), a DSP, a control module (103), a wireless module (104), a feedback microphone module (105), a loudspeaker (106), an active noise reduction module (107), a battery (108), a battery management unit (109), a switching interface (110), a Flash module (111), a data and audio sound channel switching switch (112), an output module (113) and an input module (114).
Optionally, the microphone array (101), comprising at least two microphones MIC, 4 are shown in fig. 1, is used to collect the user speech and the ambient sound one.
And the digital signal processor DSP (102) is connected with the microphone array (101) and is used for filtering and denoising the user voice and the ambient environment sound to obtain a processing signal and transmitting the processing signal to the control module. Where filtering may refer to digital filtering.
In the embodiment of the present invention, the control module (103) may be a separate earphone chip, such as a BT chip, or may be a combination of an earphone chip and a microcontroller, such as a BI chip + MCT.
In embodiments of the invention, the digital signal processor (102) may be a stand-alone IC, and may use a processor internal to the BT (if multiple MIC noise processing is supported internally by the BT).
And the wireless module (104) is connected with the control module (103) and is used for transmitting the processing signal to the target terminal through a wireless frequency band.
The noise reduction earphone can receive user voice and surrounding environment sound through the microphone array (101), then sends the user voice and surrounding environment sound to the DSP (102) to be subjected to digital filtering and noise reduction processing, sends processed signals to the control module (103), and then the control module (103) transmits the processed signals to the target terminal through a wireless frequency band and finally transmits the processed signals to a call counterpart. In this embodiment, can adopt a plurality of microphones to carry out the collection of sound signal, the mode of gathering sound is more, then carry out effectual noise reduction through digital signal processor (102), let the user all have very good noise reduction effect in modes such as any environment conversation and listening music, just so can realize normally and far-end conversation under abominable noise environment, user experience has greatly been promoted, and then the earphone among the solution correlation technique can't adapt to the more condition of ambient noise under the environment complicacy, lead to the technical problem that the user uses the experience degree of earphone to reduce.
In the embodiment of the present invention, the target terminal includes but is not limited to: a mobile phone, a PC terminal, and an audio playing device (such as a sound box), which are not specifically limited in the embodiment of the present invention.
Preferably, the noise reduction headset is a bluetooth headset.
In the embodiment of the present invention, the control mode of the noise reduction earphone may include, but is not limited to, a call mode, a music listening mode, and an analog audio signal input mode L ine in, where the call mode may include a call down state and a call up state, the call up state indicates that the noise reduction earphone is in an up state in the call mode, that is, a holder of the noise reduction earphone and a target terminal makes a sound, a microphone of the noise reduction earphone receives the sound made by the holder, and then performs noise reduction processing on the sound, and finally sends a processed sound signal to a terminal of a call counterpart, and finally sends a call voice of the holder to the call counterpart, and the call down state indicates that the noise reduction earphone is in a down state in the call mode, and the down state indicates that the target terminal receives a sound signal of the call counterpart, and then transmits the sound signal (wired or wireless) to the noise reduction earphone, and a speaker (or a speaker/SPK) of the noise reduction earphone receives the sound signal sent by the target terminal, and sends the processed sound signal through an output module (113) or the speaker, so that.
The music listening mode may refer to that the target terminal plays music, voice, video and other sounds into the noise reduction earphone, and the noise reduction earphone sends out a sound signal through the output module or the speaker after processing, so that the holder can listen to the played music, voice and video sounds. In the music listening mode, the noise reduction earphone is in a music listening state.
L line in simulation includes analog audio signal input state, and after the analog audio signal sent by the target terminal is sent to the noise reduction earphone, the noise reduction earphone sends out the sound signal through the output module or the loudspeaker after being processed, so that the holder can hear the analog audio sound.
In the embodiment of the present invention, noise reduction is performed simultaneously through the DSP or through the active noise reduction module, and then the noise-reduced sound is sent to the user.
The noise reduction processing procedure is explained below for each mode.
First, for talk mode.
For the uplink state in the call mode, a terminal holder uses the noise reduction earphone to wirelessly connect a target terminal to make a call, the microphone array collects the user sound and the ambient sound I and sends the user sound and the ambient sound I to the DSP, the DSP performs digital filtering, uplink noise reduction and Sidetone processing, and then the DSP outputs an uplink signal to the Bluetooth to send out.
After the signal of the transmitting end is processed, a part of the side tone indication is fed back to a part of the signal of the receiving telephone of the terminal, namely, the terminal holder can hear the voice of the terminal holder. The Sidetone processing may be referred to as Sidetone processing, which is to reduce the transmission of voice of the terminal holder to the terminal held by the terminal holder and improve the call quality.
Optionally, the digital signal processor (102) is further configured to perform optimization processing on downlink data sent by the target terminal when the noise reduction earphone is in a call downlink state or a music listening state, so as to obtain an optimized signal, where the call downlink state is a downlink state in which the noise reduction earphone is in a call mode; the noise reducing headphone further comprises: the feedback microphone module (105) is used for collecting the sound II of the surrounding environment when the noise reduction earphone is in a call downlink state or a music listening state; and the active noise reduction module (107) is connected with the feedback microphone module and is used for actively reducing noise of the second ambient sound, superposing the sound signal subjected to the active noise reduction processing on the optimized signal to obtain an optimized superposed signal, and sending the optimized superposed signal through a preset loudspeaker to offset the second ambient sound. The optimized signal may refer to an original call sound signal of a call counterpart.
The downlink data sent by the target terminal may include, but is not limited to: and receiving the sound signal sent by the call counterpart and the noise or interference sound signal in the transmission process at the target terminal. When optimizing the downlink data, the optimization may refer to increasing the frequency band corresponding to the voice signal of the call session to obtain a voice frequency band of a higher frequency band, and filtering out the noise signal. In the optimization process, the equalizer EQ may be used for processing. After the downlink data is optimized to obtain an optimized signal, the sound of the other party of the call can be transmitted to the active noise reduction module.
Preferably, the active noise reduction module (107) comprises: the amplification submodule is used for amplifying the surrounding environment sound II; the filtering submodule is used for filtering the surrounding environment sound II; and the phase-inverting submodule is used for carrying out phase-inverting processing on the second ambient sound so as to obtain a sound signal with the phase opposite to that of the second ambient sound.
The voice signal after the superposition processing is sent out by a loudspeaker and then is offset with the voice of the surrounding environment, thereby achieving the purpose of downlink active noise reduction.
In the embodiment of the invention, a scheme combining uplink active noise reduction and downlink active noise reduction can be adopted, so that a user can have a very good noise reduction effect in any environment for communication and listening music.
Second, for a listening music mode.
In the music listening mode, the noise reduction earphone can be in a music listening state, which comprises a music listening uplink state and a music listening downlink state. In the music listening state, the operation is basically the same as the processing mode in the call state, a user uses a noise reduction earphone to wirelessly connect a target terminal to listen to music, in the music listening downlink state, the DSP optimizes original downlink data (such as EQ, but not limited to EQ), the feedback microphone module collects ambient environment sound II, the ambient environment sound II is amplified, filtered and inverted through an active noise reduction module (ANC Circuit) and then is superposed on the optimized original music sound signal, and the signal is emitted through a loudspeaker and then is offset with the ambient environment sound II, so that the purpose of downlink active noise reduction is achieved.
Third, for analog audio signal input mode.
The noise reduction earphone in the embodiment of the invention simultaneously supports active noise reduction in a line in (analog audio signal input) mode, the noise reduction earphone is connected with a target terminal/other audio playing equipment by turning a MicroUSB wire, a feedback Microphone (MIC) collects a second ambient sound, the second ambient sound is amplified, filtered and inverted by an active noise reduction module (ANC Circuit) and is superposed on an original sound signal (L signal input in), and the second ambient sound is counteracted by the signal emitted by a loudspeaker with the second ambient sound, so that the aim of downlink active noise reduction is achieved.
Optionally, the wireless module is a bluetooth module, is wirelessly connected to the target terminal, and is configured to receive downlink data sent by the target terminal when the noise reduction earphone is in a call downlink state or a music listening state; and/or, the noise reducing headphone further comprises: and the adapter interface is in wired connection with the target terminal through a preset adapter cable and is used for receiving downlink data sent by the target terminal when the noise reduction earphone is in an analog audio signal input state.
The preset adapter wire can be a Micro USB wire, and the adapter port is a Micro USB port; or, the predetermined patch cord is Type C line, and the adaptor is Type C interface.
Optionally, in this embodiment of the present invention, the noise reduction earphone further includes at least one speaker (106), as shown in fig. 1, two speakers are connected to the active noise reduction module (107), and may receive the sound of the call counterpart transmitted by the target terminal, or the music, video sound, and analog audio sound emitted by the target terminal.
Optionally, the digital signal processing (102) and the control module (103) shown in fig. 1 are connected through an integrated circuit built-in audio bus I2S (signals can be transmitted bidirectionally), and meanwhile, the digital signal processing (102) and the control module (103) are also connected through a serial bus I2C (signals are transmitted unidirectionally by the control module).
Optionally, the digital signal processing (102) and the active noise reduction module (107) shown in fig. 1 may be connected via Audio lines (including Audio _ L and Audio _ R).
Alternatively, the active noise reduction module (107) and the control module (103) shown in fig. 1 may be connected via a serial bus I2C.
The following describes the digital signal processor (102).
Fig. 2 is a schematic diagram of an alternative digital signal processor according to an embodiment of the invention, as shown in fig. 2, the digital signal processor DSP comprising: a first processing module 22, a second processing module 24, and a third processing module 26.
The first processing module is configured to perform denoising processing on the received ambient sound when the noise reduction earphone is in an uplink call state, and send a processed sound signal to the control module through an integrated circuit built-in audio bus I2S. That is, the first processing module can deal with the uplink state of the call mode, perform noise reduction processing on the voice signal of the call counterpart, and then send the signal out through the I2S module. Namely, the uplink noise reduction processing is realized.
And the second processing module is used for processing the sound of a target microphone and transmitting the sound signal to the third processing module when the noise reduction earphone is in a call downlink state or a music listening state, wherein the third processing module outputs the processed sound signal through the digital-to-analog converter after processing the sound.
The second processing module and the third processing module can realize downlink active noise reduction processing, corresponding to a downlink state of a call mode, a music listening mode, an L ine in mode and the like, the second processing module can transmit the processed sound of a specific microphone to the third processing module, the third processing module mainly executes the processing of receiving audio, and the processed sound is output through a digital-to-analog converter.
In the embodiment of the present invention, for the active noise reduction scheme, each channel may be 1 MIC, and may also be expanded to 2 MICs or 3 MICs, and for the downlink state of the talk mode, the microphone array includes 3 MICs, 4 MICs, 5 MICs, or 6 MICs.
Optionally, the microphone is a digital microphone or an analog microphone, but is not limited to an analog microphone or a digital microphone.
In the embodiment of the present invention, the active noise reduction is performed by using a method including, but not limited to: a feedforward noise reduction form (FF form), a feedforward noise reduction form (i.e., FB form), and a feedforward + feedforward noise reduction form (i.e., Hybrid form), but is not limited to the above noise reduction forms.
Another optional noise reducing headphone further comprises: battery, supply circuit and battery management unit, battery management unit are used for managing the electric energy use of each power consumption device, and wherein, power consumption device includes at least: and a Bluetooth module.
In the embodiment of the present invention, the control program of the noise reduction earphone may be stored in the Flash module, and may also be stored in the BT or the MCU, but is not limited to the above storage manner.
As an optional embodiment of the present invention, the noise reduction headphone further includes: and the data and audio track change-over switch is connected with the control module and the switching interface.
The data and audio channel change-over switch adopted by the invention can use a depletion type audio switch, and the depletion type audio switch can also be used as a wired earphone when the battery is not electrified.
When the firmware or the module is upgraded, the unified upgrade of the Bluetooth, the MCU, the F L ASH, the uplink and active noise reduction firmware can be realized through the adapter (such as a USB interface).
By the embodiment of the invention, normal and far-end communication can be carried out under a severe noise environment by virtue of an excellent uplink communication noise reduction effect, so that the user experience is greatly improved, and a user can listen to communication and music without being influenced under noise environments such as airplanes, trains, bus stations and the like by using an active noise reduction scheme.
The invention is illustrated below by means of a further alternative embodiment.
According to an embodiment of the present invention, there is provided an embodiment of a control method for a noise reduction headphone, which may be applied to the noise reduction headphone described above, it should be noted that the steps illustrated in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be executed in an order different from that herein.
Fig. 3 is a flowchart of a control method of an alternative noise reduction headphone according to an embodiment of the present invention, as shown in fig. 3, the method includes the following steps:
step S302, when the noise reduction earphone is in a call uplink state, collecting user voice and ambient environment sound I, wherein the call uplink state indicates that the noise reduction earphone is in an uplink state of a call mode;
step S304, filtering and denoising the user voice and the ambient environment sound I to obtain a processing signal;
and step S306, transmitting the processing signal to the target terminal through the wireless frequency band.
Through the steps, when the noise reduction earphone is in a call uplink state, the first user voice and the first ambient environment sound are collected, wherein the call uplink state indicates that the noise reduction earphone is in the uplink state of a call mode, the first user voice and the first ambient environment sound are filtered and subjected to noise reduction processing to obtain a processing signal, and the processing signal is transmitted to the target terminal through a wireless frequency band. In this embodiment, can carry out effectual noise reduction to user's pronunciation and surrounding environment sound once, let the user have very good noise reduction effect in modes such as any environment conversation and listening music, just so can realize normally and the far-end is conversed under abominable noise environment, greatly promoted user experience, and then solve the unable many circumstances of surrounding noise under the environment complicacy of adaptation of earphone among the correlation technique, lead to the technical problem that the user uses the experience degree of earphone to reduce.
Optionally, the control state of the noise reduction headphone further comprises: a call down state, a music listening state and an analog audio signal input state.
Another optional feature of the control method further includes: collecting the sound II of the surrounding environment when the noise reduction earphone is in a call downlink state or a music listening state; optimizing downlink data sent by a target terminal to obtain an optimized signal; and actively denoising the second ambient sound, superposing the sound signal subjected to the active denoising treatment on the optimized signal to obtain an optimized superposed signal, and sending the optimized superposed signal through a preset loudspeaker to offset the second ambient sound.
In the embodiment of the present invention, the active noise reduction processing on the second ambient sound includes: and carrying out amplification processing, filtering processing and phase inversion processing on the second ambient sound.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium for storing a program, wherein the program, when executed by a processor, controls an apparatus on which the storage medium is located to perform the steps of: when the noise reduction earphone is in a call uplink state, acquiring user voice and ambient environment sound I, wherein the call uplink state indicates that the noise reduction earphone is in an uplink state of a call mode; filtering and denoising the user voice and the ambient environment sound I to obtain a processed signal; and transmitting the processing signal to the target terminal through the wireless frequency band.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A noise reducing headset, comprising:
the microphone array comprises at least two microphones and is used for collecting user voice and ambient environment sound I;
the digital signal processor is connected with the microphone array and used for filtering and denoising the user voice and the ambient environment sound I to obtain a processing signal and transmitting the processing signal to the control module;
and the wireless module is connected with the control module and used for transmitting the processing signal to a target terminal through a wireless frequency band.
2. The noise reducing headset of claim 1, wherein the operational state of the noise reducing headset is in a call up state, wherein the call up state indicates that the noise reducing headset is in a call mode up state.
3. The noise reduction earphone according to claim 1, wherein the digital signal processor is further configured to perform optimization processing on downlink data sent by the target terminal to obtain an optimized signal when the noise reduction earphone is in a call downlink state or a music listening state, where the call downlink state is a downlink state in which the noise reduction earphone is in a call mode;
the noise reducing headphone further comprises:
the feedback microphone module is used for collecting the sound II of the surrounding environment when the noise reduction earphone is in a call downlink state or a music listening state;
and the active noise reduction module is connected with the feedback microphone module and is used for actively reducing noise of the second ambient sound, superposing the sound signal subjected to the active noise reduction processing on the optimized signal to obtain an optimized superposed signal, and sending the optimized superposed signal through a preset loudspeaker to offset the second ambient sound.
4. The noise reduction earphone according to claim 3, wherein the wireless module is a bluetooth module, and is wirelessly connected to the target terminal, and configured to receive downlink data sent by the target terminal when the noise reduction earphone is in a call downlink state or a music listening state; and/or the presence of a gas in the gas,
the noise reducing headphone further comprises: and the adapter interface is in wired connection with the target terminal through a preset adapter cable and is used for receiving downlink data sent by the target terminal when the noise reduction earphone is in an analog audio signal input state.
5. The noise reducing headset of claim 2, wherein the digital signal processor comprises:
and the first processing module is used for performing noise elimination processing on the received ambient environment sound I when the noise reduction earphone is in a call uplink state, and sending a processed sound signal to the control module through an integrated circuit built-in audio bus I2S.
6. The noise reducing headset of claim 3, wherein the digital signal processor further comprises:
and the second processing module is used for processing the sound of a target microphone and transmitting the sound signal to the third processing module when the noise reduction earphone is in a call downlink state or a music listening state, wherein the third processing module outputs the processed sound signal through a digital-to-analog converter after processing the sound.
7. A method of controlling a noise reducing headphone, comprising:
when the noise reduction earphone is in a call uplink state, acquiring user voice and ambient environment sound I, wherein the call uplink state indicates that the noise reduction earphone is in an uplink state of a call mode;
filtering and denoising the user voice and the ambient environment sound I to obtain a processed signal;
and transmitting the processing signal to a target terminal through a wireless frequency band.
8. The method of claim 7, wherein the control state of the noise reducing headphone further comprises: a call down state, a music listening state and an analog audio signal input state.
9. The control method according to claim 8, characterized by further comprising:
collecting a second ambient sound when the noise reduction earphone is in a call downlink state or a music listening state;
optimizing downlink data sent by the target terminal to obtain an optimized signal;
and actively denoising the second ambient sound, superposing the sound signal subjected to the active denoising to the optimized signal to obtain an optimized superposed signal, and sending the optimized superposed signal through a preset loudspeaker to offset the second ambient sound.
10. A storage medium storing a program, wherein the program, when executed by a processor, controls an apparatus in which the storage medium is located to perform the control method of the noise reduction headphone according to any one of claims 7 to 9.
CN201910087052.XA 2019-01-29 2019-01-29 Noise reduction earphone and control method thereof Pending CN111491228A (en)

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