WO2019191950A1 - Procédé et appareil de réduction du bruit dans des écouteurs, écouteur maître, écouteur esclave, et système de réduction du bruit dans des écouteurs - Google Patents

Procédé et appareil de réduction du bruit dans des écouteurs, écouteur maître, écouteur esclave, et système de réduction du bruit dans des écouteurs Download PDF

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Publication number
WO2019191950A1
WO2019191950A1 PCT/CN2018/081951 CN2018081951W WO2019191950A1 WO 2019191950 A1 WO2019191950 A1 WO 2019191950A1 CN 2018081951 W CN2018081951 W CN 2018081951W WO 2019191950 A1 WO2019191950 A1 WO 2019191950A1
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WO
WIPO (PCT)
Prior art keywords
earphone
signal
ambient noise
audio
transducer
Prior art date
Application number
PCT/CN2018/081951
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English (en)
Chinese (zh)
Inventor
谢冠宏
Original Assignee
万魔声学科技有限公司
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Filing date
Publication date
Application filed by 万魔声学科技有限公司 filed Critical 万魔声学科技有限公司
Priority to PCT/CN2018/081951 priority Critical patent/WO2019191950A1/fr
Priority to CN201880001253.7A priority patent/CN108886647B/zh
Publication of WO2019191950A1 publication Critical patent/WO2019191950A1/fr

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Classifications

    • 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
    • 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
    • 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
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/103—Combination of monophonic or stereophonic headphones with audio players, e.g. integrated in the headphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/107—Monophonic and stereophonic headphones with microphone for two-way hands free communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/01—Noise reduction using microphones having different directional characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/05—Noise reduction with a separate noise microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/01—Hearing devices using active noise cancellation
    • 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
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication

Definitions

  • the present invention relates to the field of earphone technology, and in particular, to a method and device for noise reduction of a headphone, a main earphone, a slave earphone and a headphone noise reduction system.
  • the traditional Bluetooth headset includes a left earphone, a right earphone, and a cable, and the left earphone is connected to the right earphone through a cable.
  • the left or right earphone can communicate with the mobile phone Bluetooth to realize remote playback or transmission of audio files.
  • the conventional technology has at least the following problems: First, since the left earphone and the right earphone are connected by a cable, the cable restricts the degree of freedom of the Bluetooth earphone, thereby causing the user to flexibly use the Bluetooth. headset. Moreover, although the left/right earphones of the conventional Bluetooth earphones are all equipped with a noise reduction function, the noise reduction function is implemented based on the hardware architecture of the conventional Bluetooth earphone.
  • the noise reduction of the traditional Bluetooth headset is only a single-sided noise reduction method, that is, the left earphone collects the ambient noise on the left ear side for noise reduction, and the right earphone collects the ambient noise on the right ear side for noise reduction, due to the left earphone/right
  • the earphones are not able to fully and comprehensively collect the ambient noise on the opposite side, so the effect of single-sided noise reduction is not ideal.
  • An object of the present application is to provide a method and device for reducing noise of a headphone, a main earphone, a slave earphone and a headphone noise reduction system, and the noise reduction effect is good.
  • the embodiment of the present application provides the following technical solutions:
  • an embodiment of the present application provides a method for reducing noise of a headset, which is applied to a main headset, where the main headset includes a first transducer by wireless connection, and the slave headset includes a second transducer. a transducer, the main earphone and/or the slave earphone being connected to the audio source device by wireless;
  • the method includes:
  • the method further includes:
  • the first noise cancellation signal is processed according to an operation mode of the main earphone.
  • the main earphone further includes a first speaker;
  • the working mode includes an uplink mode and a downlink mode;
  • the uplink mode is to send a first audio signal to an audio source device, and the downlink mode is to receive from an audio source device Second audio signal;
  • the processing the first noise cancellation signal according to the working mode of the main earphone comprises:
  • the uplink mode includes a call uplink mode, where the downlink mode includes an audio play mode and a call downlink mode.
  • the method further includes:
  • the primary headset communicates with the slave headset Bluetooth.
  • an embodiment of the present application provides a method for reducing noise of a headset, which is applied to a slave headset, and the slave headset includes a first transducer by wirelessly, the master headset includes a first transducer, and the slave headset includes a second a transducer, the main earphone and/or the slave earphone are connected to the audio source device by wireless, the first transducer is for collecting a first ambient noise signal, and the second transducer is for collecting a second environment Noise signal
  • the method includes:
  • the method further includes:
  • the slave headset communicates with the master headset in Bluetooth.
  • an embodiment of the present application provides a headphone noise reduction device, which is applied to a main earphone, the main earphone is connected to the earphone by wireless connection, the main earphone includes a first transducer, and the slave earphone includes a second a transducer, the main earphone and/or the slave earphone being connected to the audio source device by wireless;
  • the device includes:
  • a first acquiring module configured to acquire a first ambient noise signal collected by the first transducer
  • a first receiving module configured to receive, according to wireless communication, a second ambient noise signal collected by the second transducer
  • a first generating module configured to generate a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.
  • the device further includes:
  • a determining module configured to determine the working mode of the main headset
  • a processing module configured to process the first noise cancellation signal according to an operation mode of the main earphone.
  • the main earphone further includes a first speaker;
  • the working mode includes an uplink mode and a downlink mode;
  • the uplink mode is to send a first audio signal to an audio source device, and the downlink mode is to receive from an audio source device Second audio signal;
  • the processing module includes:
  • a first sending unit configured to send the first noise canceling signal and the first audio signal to an audio source device
  • a second sending unit configured to reduce noise in the first audio signal by using the first noise cancellation signal, obtain a third audio signal, and send the third audio signal to an audio source device;
  • a playing unit configured to play the first noise cancellation signal and the second audio signal through the first speaker.
  • the uplink mode includes a call uplink mode, where the downlink mode includes an audio play mode and a call downlink mode.
  • the device further includes:
  • a first sending module configured to send the first ambient noise signal to the slave earphone, so that the slave earphone generates a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal .
  • the primary headset communicates with the slave headset Bluetooth.
  • an embodiment of the present application provides a headset noise reduction device, which is applied to a slave headset, and the slave headset wirelessly connects a master headset, the master headset includes a first transducer, and the slave headset includes a second a transducer, the main earphone and/or the slave earphone are connected to the audio source device by wireless, the first transducer is for collecting a first ambient noise signal, and the second transducer is for collecting a second environment Noise signal
  • the device includes:
  • a second acquiring module configured to acquire the second ambient noise signal
  • a second sending module configured to send the second ambient noise signal to the main earphone based on wireless communication, so that the main earphone generates a first according to the first ambient noise signal and the second ambient noise signal A noise cancellation signal.
  • the device further includes:
  • a second receiving module configured to receive the first ambient noise signal based on wireless communications
  • a second generating module configured to generate a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.
  • the slave headset communicates with the master headset in Bluetooth.
  • an embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when When the program instructions are executed by the main headphone, the main headphone is caused to perform the above-described headphone noise reduction method.
  • an embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when When the program instructions are executed from the earphone, the slave earphones perform the above-described earphone noise reduction method.
  • the embodiment of the present application further provides a non-transitory computer readable storage medium storing computer executable instructions for causing a main headset to execute The earphone noise reduction method as described above.
  • embodiments of the present application further provide a non-transitory computer readable storage medium storing computer-executable instructions for causing execution from a headset The earphone noise reduction method as described above.
  • the embodiment of the present application provides a main earphone, including a first transducer, a first wireless communication module, a first audio decoding chip, a first control module, and a first speaker, where the first control module respectively Connecting with the first transducer, the first wireless communication module, the first audio decoding chip, and the first speaker;
  • the first control module includes:
  • At least one first processor and,
  • a first memory communicatively coupled to the at least one first processor; wherein the first memory stores instructions executable by the at least one first processor, the instructions being processed by the at least one first
  • the apparatus is operative to enable the at least one first processor to perform the headphone noise reduction method of any of the above.
  • the embodiment of the present application provides a slave earphone, including a second transducer, a second wireless communication module, a second audio decoding chip, a second control module, and a second speaker, where the second control module respectively Connecting with the second transducer, the second wireless communication module, the second audio decoding chip, and the second speaker;
  • the second control module includes:
  • At least one second processor At least one second processor
  • a second memory communicatively coupled to the at least one second processor; wherein the second memory stores instructions executable by the at least one second processor, the instructions being processed by the at least one second Executing to enable the at least one second processor to perform the headphone noise reduction method of any of the above.
  • an embodiment of the present application provides a headphone noise reduction system, including the main earphone and the slave earphone, and the master earphone and the slave earphone are wirelessly connected.
  • the main earphone, the slave earphone and the earphone noise reduction system the main earphone is connected from the earphone by wireless connection, the main earphone includes a first transducer, and the second earphone includes a second change Energy device.
  • the first ambient noise signal collected by the first transducer is acquired.
  • receiving the second ambient noise signal collected by the second transducer based on the wireless communication, receiving the second ambient noise signal collected by the second transducer; and again, generating the first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.
  • it enables noise reduction on wireless headphones.
  • its noise reduction effect is good, which enhances the user experience.
  • 1 is a headset noise reduction system according to an embodiment of the present application
  • FIG. 3 is a circuit block diagram of an earphone according to an embodiment of the present application.
  • Figure 3a is a circuit block diagram of the control module of Figure 3;
  • Figure 3b is a circuit block diagram of the noise reduction circuit of Figure 3a;
  • Figure 3c is a block diagram of another circuit principle of the noise reduction circuit of Figure 3a;
  • FIG. 4 is a schematic flowchart of a method for communicating a headset according to an embodiment of the present application
  • FIG. 5 is a schematic flowchart of a method for reducing noise of a headset according to an embodiment of the present application
  • FIG. 6 is a schematic flowchart diagram of another method for reducing noise of a headset according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart diagram of another method for reducing noise of a headset according to an embodiment of the present application.
  • FIG. 7a is a schematic flowchart of a method for reducing noise of a headset according to another embodiment of the present application.
  • FIG. 7b is a schematic flowchart diagram of a method for reducing noise of a headset according to still another embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a method for reducing noise of a headset according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a method for reducing noise of a headset according to another embodiment of the present application.
  • FIG. 8b is a schematic diagram of an application scenario of a headset noise reduction according to an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a headphone noise reduction device according to an embodiment of the present application.
  • FIG. 9a is a schematic block diagram of a headphone noise reduction device according to another embodiment of the present application.
  • Figure 9b is a schematic block diagram of the processing module of Figure 9a;
  • FIG. 9c is a schematic block diagram of a headphone noise reduction device according to still another embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a headphone noise reduction device according to another embodiment of the present application.
  • FIG. 10a is a schematic block diagram of a headphone noise reduction device according to still another embodiment of the present application.
  • the earphone provided by the embodiment of the present application is configured to be at least partially capable of being worn in the vicinity of one ear or two ears or in the ear of the user's ears, although the structural shape of the earphone exhibits various changes, however, the embodiment of the present application provides The technical solution can be applied to earphones of any structural shape, such as including in-ear headphones, headphones or over-the-ear headphones.
  • headphone is replaced by another name in other business or technical fields, for example, "headphone” is replaced by “talker” or “hearing aid” or “speaker” or “sound”, however, embodiments of the present application provide The technical solution can be applied to any audio device that has the same or the same function as the "headphone” to perform the same type of function.
  • any user can use the technical solutions provided by the embodiments of the present application in any suitable working mode based on the technical solutions disclosed in the embodiments of the present application or according to the disclosed technical solutions.
  • the main headset can be switched from the earphone to the dual earphone connection mode, the dual earphone disconnect mode, the dual earphone simultaneous use mode, the single earphone use mode, or the analog walkie talk mode, and the like.
  • FIG. 1 is a schematic diagram of a headphone noise reduction system according to an embodiment of the present application.
  • the earphone noise reduction system 100 includes a first audio source device 12, a main earphone 14 and a slave earphone 16, the main earphone 14 and the slave earphone 12 are wirelessly connected, and the main earphone 14 is also connected to the first audio source device 12. Wireless connections.
  • wireless connection may be any suitable wireless communication connection, such as Bluetooth or the like.
  • the main headphone 14 is connected to the slave earphone 16 and the first audio source device 12 by Bluetooth, respectively.
  • the first audio source device 12 may be any suitable device having the ability to provide audio content or to play audio data and storage capabilities, such as a smartphone, tablet, MP3 player, personal Computers, laptops, personal stereos, CD players or other smart/non-smart terminals.
  • the first audio source device 12 is coupled to at least one storage medium for storing audio data, which may be a memory within the user terminal device, or may be a storage medium on the Internet, and acquire an audio file from the storage medium.
  • the first audio source device 12 can also be a combination of one or more electronic devices, such as a smart phone and an analog to digital converter (DAC) coupled thereto.
  • DAC analog to digital converter
  • the first audio source device 12 can implement a connection with/from the headset 16 via an internal integrated or external Bluetooth module or Bluetooth chip.
  • Bluetooth-enabled devices When two Bluetooth-enabled devices establish a connection, they get the protocol provided by the corresponding device. Only devices that use the same protocol can exchange data.
  • the first audio source device 12 supports the A2DP and AVRCP protocols, and also supports the following audio coding modes: SBC (Sub Band Coding), MP3, AAC (Advanced Audio Coding), Apt-X, and the like. .
  • the encoding rate of the SBC encoding format is 44.1 kHz and the maximum is 328 kbit/s
  • the encoding rate of the AAC encoding format is 320 kbit/s
  • the encoding rate of the Apt-X encoding format is 352 kbit/s.
  • the first audio source device 12 may also be a local audio device, wherein the local audio device includes a USB interface device and an analog interface device (ADC/SPDIF/I2S).
  • the local audio interface buffers the audio data in the internal RAM of the first audio source device 12 and uses SBC encoding.
  • Bluetooth-enabled devices do not need to implement the full Bluetooth specification.
  • some application layer profiles are defined in the Bluetooth specification to define how a connection or application is implemented between Bluetooth-enabled devices.
  • A2DP Advanced Audio Distribution Profile
  • a protocol stack and method for transferring high quality music file data A2DP is specifically designed to transmit stereo audio using Bluetooth.
  • AVRCP Audio/Video Remote Control Profile
  • This profile is used to license a single remote control device (or other device) to control all users. Access to the A/V device.
  • the main headphone 14 is only capable of Bluetooth connection to a first audio source device 12. And, when the main earphone 14 is Bluetooth connected from the earphone 16, the main earphone 14 receives and plays the audio signal transmitted by the first audio source device 12, and the main earphone 14 also forwards the audio signal to the slave earphone 16, which plays the audio from the earphone 16. Signal to achieve dual stereo. When the main headphone 14 is not Bluetooth-connected from the headphone 16, the main headphone 14 plays an audio signal, thereby achieving a single stereo.
  • the audio signal transmitted by the first audio source device 12 to the main earphone 14 can also be detected from the earphone 16 and the audio signal can be played.
  • the main headphone 14 and the slave headphone 16 are wirelessly connected, which greatly expands the degree of freedom of the master/slave headphone, the user can use the master/slave headphone more flexibly and realize true wireless stereo (True Wireless Stereo) , TWS) effect.
  • true wireless stereo True Wireless Stereo
  • FIG. 2 is a schematic diagram of another earphone noise reduction system according to an embodiment of the present application. As shown in FIG. 2, the headphone noise reduction system 100 further includes a second audio source device 18 that is Bluetooth connected to the slave headset 16.
  • the "main earphone 14" is the master earphone, and the “slave earphone 16” is the slave earphone.
  • the second audio source device 18 "from the earphone 16" is the primary earphone, and the "main earphone 14" is the secondary earphone.
  • the headphone noise reduction system 100 can operate in the TWS mode of operation.
  • TWS mode a single earphone can connect up to one audio source device, and a group of TWS sessions can connect up to two audio source devices.
  • the first audio source device 12 is Bluetooth paired with the primary headset 14, and the second audio source device 18 is paired with the secondary headset 16 Bluetooth.
  • the first audio source device 12 establishes a TWS session with the primary headset 14, and the second audio source device 18 establishes a TWS session with the secondary headset 16.
  • Play audio After the TWS session is successfully established, when the first audio source device 12 plays the audio signal, the main earphone 14 receives the first audio signal and forwards the first audio signal to the slave earphone 16. When the second audio source device 18 plays the second audio signal, the second audio signal is received from the earphone 16 and the second audio signal is forwarded to the main earphone 14.
  • the earphone 300 includes a transducer 31, a wireless communication module 32, a control module 33, an audio decoding chip 34, and a speaker 35.
  • the control module 33 is respectively coupled to the transducer 31, the wireless communication module 32, and the audio decoding chip 34.
  • the speaker 35 is connected.
  • the transducer 31 is used to collect an environmental noise signal or an audio signal, which may be sent by the user or may be sent by other audio source devices.
  • the transducer 31 can be disposed at a suitable location external to the housing of the earphone 300.
  • the transducer 31 can be any suitable acoustically-electrically transducing device, such as a microphone.
  • the wireless communication module 32 is for wirelessly connecting with an audio source device or a master/slave headset, and the wireless communication module 32 receives an audio signal transmitted by the audio source device or the master/slave headset.
  • the wireless communication module 32 can be a short range communication technology such as Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wide Band (UWB), or ZigBee.
  • RFID Radio Frequency Identification
  • IrDA Infrared Data Association
  • UWB Ultra Wide Band
  • ZigBee ZigBee
  • the control module 33 serves as a control core of the earphone 300, and the control module 33 cooperates with other devices to perform various functions of the earphone 300.
  • the control module 33 receives the audio signal collected by the transducer 31 and transmits it to the audio source device via the wireless communication module 32.
  • the wireless communication module 32 receives the audio signal transmitted by the audio source device, and is sent to the audio decoding chip 34 under the control of the control module 33.
  • the audio decoding chip 34 decodes the audio signal
  • the control module 33 decodes the audio signal.
  • the audio signal is played through the speaker 35.
  • the control module 33 receives the ambient noise signal collected by the transducer 31, and generates a noise cancellation signal having the same amplitude and opposite phase as the ambient noise signal according to the ambient noise signal to reduce the interference of the environmental noise.
  • the wireless communication module 32, the control module 33, and the audio decoding chip 34 may be packaged on the same integrated chip, and no restrictions are imposed on the circuit structures of the wireless communication module 32, the control module 33, and the audio decoding chip 34. .
  • the transducer 31 is a first/second transducer
  • the wireless communication module 32 is a first/second wireless communication module
  • the control module 33 is a A/second control module
  • the audio decoding chip 34 is a first/second audio decoding chip
  • the speaker 35 is a first/second speaker.
  • a noise reduction circuit can be configured to implement active noise reduction of the earphone.
  • control module 33 includes a processor 331, a memory 332, and a noise reduction circuit 333.
  • the processor 331 is connected to the memory 332 and the noise reduction circuit 333, respectively.
  • the processor 331 can be implemented by using at least one of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field Programming gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and other electronic units that perform these functions.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • DSPD digital signal processing device
  • PLD programmable logic device
  • FPGAs field Programming gate arrays
  • the number of the processors 331 may be one or plural.
  • Memory 332 includes high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
  • memory 332 can optionally include a memory remotely located relative to processor 331 that can be connected to the headset over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • the memory 332 is used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/units corresponding to the earphone noise reduction methods/devices referred to herein.
  • the processor 331 performs various functional applications of the earphones and data processing by running non-volatile software programs, instructions, and units stored in the memory 332, that is, implementing the above-described method embodiment earphone noise reduction method/device.
  • the noise reduction circuit 333 is connected to the transducer 31 and the speaker 35, respectively.
  • the noise reduction circuit 36 receives the environmental noise signal collected by the transducer 31, and performs noise reduction processing on the environmental noise signal under the control of the processor 331 to output a noise cancellation signal.
  • the noise reduction circuit 333 includes a first ADC converter 33a, a sample rate converter 33b, a signal processor 33c, and an adder 33d.
  • the first ADC converter 33a is for converting the environmental noise signal into a digital signal
  • the sampling rate converter 33b samples the digital signal according to a preset sampling rate
  • the signal processor 33c filters and processes the sampled digital signal
  • the adder 33d The desired audio signal and the sampled digital signal are superimposed and played through the speaker 35.
  • the user can configure a high sampling rate in the memory 332 in advance, the processor 331 accesses the memory 332, retrieves data of a high sampling rate, and configures the sampling rate converter 33b so that the sampling rate converter 33b can increase the sampling rate.
  • a noise reduction feedback circuit may also be configured to implement feedback of the noise reduction process.
  • the noise reduction circuit 333 further includes a second ADC converter 33e and a compression controller 33f.
  • the second ADC converter 33e is for collecting a noise canceling signal or an audio signal that is pushed to the speaker 35, and converting the noise canceling signal or the audio signal into a digital signal.
  • the compression controller 33f is configured to detect whether the amplitude of the digital signal is greater than a preset value and an abnormal condition such as clipping occurs. When detecting that the amplitude of the digital signal is greater than a preset value, clipping occurs, and the compression controller 33f reduces the signal. The amplitude of the audio data output by the processor 33c.
  • each side earphone requires only one microphone to complete the noise reduction, thereby greatly reducing the cost of the earphone.
  • noise reduction circuit structure as described herein, those skilled in the art may also evolve other alternative noise reduction circuits according to the technical solutions disclosed herein, and variations or substitutions thereof are intended to fall within the scope of the present application. I will not repeat them here.
  • a headphone noise reduction method is provided herein as an example to elaborate the earphone noise reduction process, but the example is not intended to limit the scope of protection of the present application.
  • FIG. 4 is a schematic flowchart diagram of a method for communicating a headset according to an embodiment of the present application.
  • the headset communication method 400 includes:
  • the audio source device sends the first connection information and the audio signal to the first earphone;
  • the first earphone establishes a Bluetooth connection with the audio source device according to the first connection information, and at this time, the first earphone functions as the primary earphone.
  • the first connection information includes a Bluetooth protocol, device control information, and the like, and the audio signal includes music data or call data.
  • the first earphone sends the second connection information to the audio source device to maintain the primary connection and related communication;
  • the first earphone sends third connection information and the audio signal to the second earphone;
  • the second earphone establishes a Bluetooth connection with the first earphone according to the third connection information, and at this time, the second earphone acts as the slave earphone.
  • the second connection information includes a Bluetooth protocol, device control information, and the like.
  • the second earphone sends fourth connection information to the first earphone.
  • the fourth connection information includes a Bluetooth protocol, device control information, and the like.
  • the primary headset establishes a communication connection with the secondary headset.
  • the embodiment of the present application provides a headset noise reduction method that works in an uplink mode.
  • the uplink mode sends an audio signal to the audio source device for the main earphone, wherein the uplink mode includes a call uplink mode.
  • the earphone noise reduction method 500 includes:
  • the main earphone acquires a first ambient noise signal collected by the first transducer
  • the audio signal may be an audio signal obtained from the earphone from other audio source devices, or may be an audio signal stored locally from the earphone, and may be a voice signal collected by the second transducer.
  • the first transducer and the second transducer are respectively located at the left and right ears, the distance is sufficiently far, the characteristics of the environmental noise can be better obtained, and it is not easily affected by the earphone housing.
  • the main earphone generates a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal;
  • the main earphone processes the first noise cancellation signal according to the uplink mode.
  • the main earphone may send the first noise cancellation signal and the first audio signal to the audio source device, so that the audio source device reduces noise in the first audio signal according to the first noise cancellation signal, thereby avoiding the main earphone.
  • the main earphone can use the first noise canceling signal to reduce the noise in the first audio signal, obtain the third audio signal, and send the third audio signal to the audio source device, so that the audio source device can directly hear the clear audio. signal.
  • the first audio signal may be an audio signal collected by the main earphone or a locally acquired audio signal, or may be an audio signal collected from the earphone or a locally acquired audio signal, or may be an audio signal collected by the superimposed master/slave earphone. Or locally acquired audio signal.
  • the main earphone may further transmit a first ambient noise signal to the slave earphone, and the slave earphone generates a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.
  • the voice of the audio source device is more clear through the noise reduction of the master/slave headset.
  • the embodiment of the present application provides a method for reducing noise of the earphone operating in the downlink mode.
  • the downlink mode receives the second audio signal from the audio source device, wherein the downlink mode includes an audio play mode and a call downlink mode.
  • the earphone noise reduction method 600 includes:
  • the main earphone receives a second audio signal transmitted by the audio source device.
  • the second audio signal includes music data or call data.
  • the main earphone acquires a first ambient noise signal collected by the first transducer
  • the main earphone sends the first ambient noise signal and the second audio signal to the slave earphone;
  • the main earphone generates a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal;
  • the main earphone processes the first noise cancellation signal according to the downlink mode
  • the main earphone plays the first noise canceling signal and the second audio signal through the first speaker.
  • the second noise canceling signal and the second audio signal are played from the earphone through the second speaker.
  • the sound of the near-end of the earphone is clearer by the noise reduction effect of the master/slave headphones.
  • the embodiment of the present application provides a method for reducing noise of the earphone.
  • the earphone noise reduction method 700 includes:
  • the main earphone can also receive the audio signal sent by the audio source device, or the audio signal captured from the local device, or receive the audio signal forwarded from the earphone.
  • the headphone noise reduction method 700 is capable of achieving noise reduction on a wireless headset.
  • the headphone noise reduction method 700 has a good noise reduction effect, thereby improving the user experience.
  • the earphones since the earphones have multiple working modes, correspondingly, the earphones can also match different noise reduction modes in different working modes in order to meet the needs of the user in different earphone working modes.
  • the earphone noise reduction method 700 further includes:
  • the working mode includes an uplink mode and a downlink mode
  • the uplink mode is to send the first audio signal to the audio source device
  • the downlink mode is to receive the second audio signal from the audio source device.
  • the main earphone may send the first noise cancellation signal and the first audio signal to the audio source device, or reduce the first audio signal by using the first noise cancellation signal.
  • Noise, obtaining a third audio signal, and transmitting the third audio signal to the audio source device for example, the main earphone will operate the received first ambient noise signal, the audio signal, and the second ambient noise signal and the audio signal transmitted from the earphone, Each audio signal is extracted and cancels the surrounding ambient noise signal.
  • the main earphone also performs beam forming on the vertical direction of the first transducer to enhance the vertical direction of the first transducer.
  • the main earphone can also play the first noise canceling signal and the second audio signal through the first speaker.
  • the uplink mode includes a call uplink mode
  • the downlink mode includes an audio play mode and a call downlink mode.
  • the call uplink mode is to upload the call data to the mobile phone
  • the call downlink mode is that the mobile phone broadcasts the call data to the main earphone
  • the audio play mode is that the mobile phone transmits the music to the main earphone.
  • the main headphone can actively perform ambient noise, but also active noise reduction can be realized from the earphone.
  • the earphone noise reduction method 700 further includes:
  • an embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising a program And instructing the main earphone to perform the above-described earphone noise reduction method when the program instruction is executed by the main earphone.
  • the headphone noise reduction method 700 is capable of achieving noise reduction on a wireless headset.
  • the headphone noise reduction method 700 has a good noise reduction effect, thereby improving the user experience.
  • the embodiment of the present application further provides a non-transitory computer readable storage medium, where the computer readable storage medium stores computer executable instructions, where the computer executable instructions are used
  • the main earphone is caused to perform the earphone noise reduction method as described above.
  • the headphone noise reduction method 700 is capable of achieving noise reduction on a wireless headset.
  • the headphone noise reduction method 700 has a good noise reduction effect, thereby improving the user experience.
  • the embodiment of the present application provides another method for reducing noise of the earphone.
  • the earphone noise reduction method 800 includes:
  • the second ambient noise signal is sent to the main earphone based on the wireless communication, so that the main earphone generates the first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.
  • the main earphone can realize active noise reduction by assisting from the earphone, and improve the sound clarity of the main earphone end.
  • the roles between the "master headset” and the “slave headset” are relative.
  • the first earphone is connected to the first audio source device
  • the second earphone is connected to the first earphone
  • the second earphone is connected to the second audio source device.
  • the first earphone is “ The main earphone”
  • the second earphone is “from the earphone”.
  • the first earphone is “slave earphone”
  • the second earphone is "main earphone”.
  • the main headphone can actively perform ambient noise, but also active noise reduction can be realized from the earphone.
  • the earphone noise reduction method 800 further includes:
  • an embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising a program And instructing, when the program instruction is executed from the earphone, the slave earphone noise reduction method to be performed.
  • the main earphone can realize active noise reduction by assisting from the earphone, and improve the sound clarity of the main earphone end.
  • the embodiment of the present application further provides a non-transitory computer readable storage medium, where the computer readable storage medium stores computer executable instructions, where the computer executable instructions are used
  • the earphone noise reduction method as described above is performed from the earphone.
  • the main earphone can realize active noise reduction by assisting from the earphone, and improve the sound clarity of the main earphone end.
  • the embodiments of the present application provide a schematic diagram of a headset noise reduction application scenario.
  • the audio source device is a mobile phone 801
  • the first earphone 802 is a main earphone
  • the second earphone 803 is a slave earphone.
  • the mobile phone 801 transmits the connection information A and the downlink call data to the first earphone 802, and the first earphone 802 transmits the connection information B to the mobile phone 801, so that the mobile phone 801 establishes Bluetooth communication with the first earphone 802.
  • the first earphone 802 transmits the connection information C to the second earphone 803, the second earphone 803 transmits the connection information D to the first earphone 802, and the first earphone 802 establishes Bluetooth communication with the second earphone 803.
  • the first microphone M1 of the first earphone 801 collects the first ambient noise signal MIC1, and the first earphone 802 sends the downlink call data and the first ambient noise signal MIC1 to the second earphone 803 to the second earphone 803.
  • the second microphone M2 of the second earphone 803 collects the second ambient noise signal MIC2 and transmits the second ambient noise signal MIC2 to the first earphone 802.
  • the first earphone 802 is based on the first ambient noise signal MIC1.
  • the first noise canceling signal ANC1 is generated with the second ambient noise signal MIC2, and the second earphone 803 generates the first noise canceling signal ANC2 according to the first ambient noise signal MIC1 and the second ambient noise signal MIC2.
  • the first earphone 802 plays the downlink call data A
  • the second earphone 803 plays the downlink call data B.
  • the first microphone M1 collects the first ambient noise signal MIC1 and the audio signal A from the user's mouth 804, and the second microphone M2 collects the second ambient noise signal MIC2 and the audio signal B from the user's mouth 804.
  • the second earphone 803 sends the second ambient noise signal MIC2 and the audio signal B to the first earphone 802, and the first earphone 802 operates the first environmental noise signal MIC1, the audio signal A, the second environmental noise signal MIC2, and the audio signal B.
  • the audio signal A and the audio signal B are extracted as uplink call data, and beam forming is performed on the vertical direction of each microphone to enhance the vertical direction of the microphone.
  • the first earphone 802 generates a noise cancellation signal to cancel the first environmental noise signal MIC1 and the second environmental noise signal MIC2 to transmit the clear and clear audio signal to the mobile phone 801.
  • the first earphone 802 can also send the first ambient noise signal MIC1 and the audio signal A to the second earphone 803, and the second earphone 803 sets the first ambient noise signal MIC1, the audio signal A, and the second ambient noise.
  • the signal MIC2 and the audio signal B are operated, and the audio signal A and the audio signal B are extracted as uplink call data, and beam forming is performed on the vertical direction of each microphone to enhance the vertical direction of the microphone.
  • the second earphone 803 generates a noise cancellation signal to cancel the first environmental noise signal MIC1 and the second environmental noise signal MIC2, and sends the denoised audio signal to the first earphone 802, and the first earphone 802 is denoised again.
  • the audio signal is sent to the handset 801 so that the handset 801 can hear a clear and clear audio signal.
  • the noise cancellation signal may be formed in any one of the above bodies (the audio source device, the first earphone, and the second earphone), and no limitation is imposed on the manner in which the noise cancellation signal is formed. .
  • an embodiment of the present application provides a headphone noise reduction device, which is applied to a main earphone, the main earphone is connected from the earphone through a wireless connection, the main earphone includes a first transducer, and the second earphone includes a second switch. Energy device.
  • the earphone noise reduction device acts as a software system, which is stored in the memory set forth in Figure 3a.
  • the earphone noise reduction device includes a plurality of instructions stored in a memory, and the processor can access the memory and call the instruction to execute to complete the above-mentioned earphone noise reduction control logic.
  • the earphone noise reduction device 900 includes a first acquisition module 91 , a first receiving module 92 , and a first generation module 93 .
  • the first obtaining module 91 is configured to acquire a first ambient noise signal collected by the first transducer.
  • the first receiving module 92 is configured to receive a second ambient noise signal collected by the second transducer based on the wireless communication.
  • the first generating module 93 is configured to generate a first noise canceling signal according to the first ambient noise signal and the second ambient noise signal.
  • the earphone noise reduction device 900 further includes a determination module 94 and a processing module 95.
  • the determination module 94 is for determining the primary headset operating mode.
  • the processing module 95 is configured to process the first noise cancellation signal according to an operation mode of the main earphone.
  • the primary headset further includes a first speaker; the operational mode includes an uplink mode and a downlink mode; the uplink mode is to transmit the first audio signal to the audio source device, and the downlink mode is to receive the second audio signal from the audio source device.
  • the processing module 95 includes a first sending unit 951, a second sending unit 952, and a playing unit 953.
  • the first sending unit 951 is configured to send the first noise canceling signal and the first audio signal to the audio source device; or
  • the second sending unit 952 is configured to reduce noise in the first audio signal by using the first noise cancellation signal, obtain a third audio signal, and send the third audio signal to the audio source device; or
  • the playing unit 953 is configured to play the first noise canceling signal and the second audio signal through the first speaker.
  • the uplink mode includes a call uplink mode
  • the downlink mode includes an audio play mode and a call downlink mode
  • the earphone noise reduction device 900 further includes a first transmitting module 96.
  • the first sending module 96 is configured to send a first ambient noise signal to the slave earphone, so that the slave earphone generates a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.
  • the primary headset communicates with the headset Bluetooth.
  • the earphone noise reduction device can perform the earphone noise reduction method provided by the embodiment of the present application, and has a function module and a beneficial effect corresponding to the execution method.
  • the earphone noise reduction method provided by the embodiment of the present application.
  • an embodiment of the present application provides a headphone noise reduction device, which is applied to wirelessly connect a main earphone from an earphone, and the main earphone includes a first transducer, and the second earphone includes a second switch.
  • the first transducer is configured to acquire a first ambient noise signal
  • the second transducer is configured to acquire a second ambient noise signal.
  • the earphone noise reduction device acts as a software system that is stored in the memory set forth in Figure 3a.
  • the earphone noise reduction device includes a plurality of instructions stored in a memory, and the processor can access the memory and call the instruction to execute to complete the above-mentioned earphone noise reduction control logic.
  • the earphone noise reduction device 1000 includes a second acquisition module 1001 and a second transmission module 1002.
  • the second obtaining module 1001 is configured to acquire a second ambient noise signal.
  • the second sending module 1002 is configured to send a second ambient noise signal to the main earphone based on the wireless communication, so that the main earphone generates the first noise canceling signal according to the first ambient noise signal and the second ambient noise signal.
  • the earphone noise reduction device 1000 further includes: a second receiving module 1003 and a second generating module 1004.
  • the second receiving module 1003 is configured to receive the first ambient noise signal based on the wireless communication.
  • the second generating module 1004 is configured to generate a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.
  • Bluetooth is communicated from the headset to the primary headset.
  • the earphone noise reduction device can perform the earphone noise reduction method provided by the embodiment of the present application, and has a function module and a beneficial effect corresponding to the execution method.
  • the earphone noise reduction method provided by the embodiment of the present application.
  • the embodiments can be implemented by means of software plus a general hardware platform, and of course, by hardware.
  • a person skilled in the art can understand that all or part of the process of implementing the above embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)
  • Telephone Function (AREA)

Abstract

La présente invention concerne le domaine technique des écouteurs et, en particulier, un procédé et un appareil de réduction du bruit dans des écouteurs, un écouteur maître, un écouteur esclave, et un système de réduction du bruit dans des écouteurs. Le procédé de réduction du bruit dans des écouteurs est appliqué à l'écouteur maître. L'écouteur maître est connecté sans fil à l'écouteur esclave. L'écouteur maître comprend un premier transducteur, et l'écouteur esclave comprend un second transducteur. L'écouteur maître et/ou l'écouteur esclave sont connectés sans fil à un dispositif de source audio. Le procédé de réduction du bruit dans des écouteurs consiste à : acquérir un premier signal de bruit ambiant recueilli par le premier transducteur; recevoir, par communications sans fil, un second signal de bruit ambiant recueilli par le second transducteur; et générer un premier signal d'annulation du bruit en fonction du premier signal de bruit ambiant et du second signal de bruit ambiant. La présente invention permet une réduction du bruit dans des écouteurs sans fil et assure une réduction efficace du bruit, ce qui améliore l'expérience utilisateur.
PCT/CN2018/081951 2018-04-04 2018-04-04 Procédé et appareil de réduction du bruit dans des écouteurs, écouteur maître, écouteur esclave, et système de réduction du bruit dans des écouteurs WO2019191950A1 (fr)

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CN201880001253.7A CN108886647B (zh) 2018-04-04 2018-04-04 耳机降噪方法及装置、主耳机、从耳机及耳机降噪系统

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