WO2015139642A1 - Procédé, dispositif et système de réduction de bruit de casque d'écoute bluetooth - Google Patents

Procédé, dispositif et système de réduction de bruit de casque d'écoute bluetooth Download PDF

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Publication number
WO2015139642A1
WO2015139642A1 PCT/CN2015/074547 CN2015074547W WO2015139642A1 WO 2015139642 A1 WO2015139642 A1 WO 2015139642A1 CN 2015074547 W CN2015074547 W CN 2015074547W WO 2015139642 A1 WO2015139642 A1 WO 2015139642A1
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WIPO (PCT)
Prior art keywords
signal
bluetooth headset
noise
terminal
bluetooth
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PCT/CN2015/074547
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English (en)
Chinese (zh)
Inventor
张圣杰
彭春花
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努比亚技术有限公司
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Publication of WO2015139642A1 publication Critical patent/WO2015139642A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
    • H04M1/6066—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone including a wireless connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/02—Details of telephonic subscriber devices including a Bluetooth interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops

Definitions

  • the present invention relates to the field of terminal technologies, and in particular, to a method, device and system for implementing noise reduction of a Bluetooth headset.
  • the active noise reduction function is to generate a reverse sound wave equal to the external noise through the noise reduction system, neutralize the noise, and achieve the effect of noise reduction.
  • the active noise canceling headphones have noise reduction circuits that are compatible with external noise. Most of them use a large head-mounted design, which can be used to block external noise by using earplug cotton and earphone casings, and the first round of sound insulation. In order to have sufficient space to install active noise reduction circuits and power supplies.
  • the passive noise canceling earphone mainly forms an enclosed space by surrounding the ear, or uses a soundproof material such as a silicone earplug to block external noise. Since the noise is not processed by the noise reduction circuit chip, generally only high frequency noise is blocked, and the noise reduction effect on the low frequency noise is not obvious.
  • the technical problem to be solved by the present invention is to provide a method, device and system for realizing noise reduction of a Bluetooth headset, so as to solve the technical problem that the current Bluetooth headset is large in size, high in cost, and low in noise reduction effect.
  • a method for implementing Bluetooth headset noise reduction is applied to a terminal, and the Bluetooth headset includes at least one microphone, including the steps of:
  • an inverted signal is generated according to the noise signal and sent to the Bluetooth headset.
  • generating the inverted signal according to the noise signal further comprises:
  • the signal processor calculates a frequency spectrum according to the noise signal, and generates an inverted signal with the opposite phase and the same amplitude;
  • the inverted signal is sent back to the terminal via the Bluetooth protocol.
  • the voice data channel comprises a music channel and a call channel.
  • the music channel is turned on, the terminal and the Bluetooth headset send and receive signals based on the A2DP Bluetooth audio transmission model protocol.
  • the call channel is opened, the terminal and the Bluetooth headset are based on The HFP hands-free calling protocol sends and receives signals.
  • a method for implementing Bluetooth headset noise reduction for a Bluetooth headset, the Bluetooth headset including at least one microphone, including the steps of:
  • the received inverted signal After receiving the inverted signal sent by the terminal, the received inverted signal is played along with the music signal or the voice signal.
  • collecting the noise signal comprises collecting the noise signal by detecting low frequency noise in an environment that can be heard by the human ear.
  • the at least one microphone comprises a noise microphone for collecting noise signals.
  • collecting the noise signal comprises: acquiring the noise signal in real time or timing.
  • a method for implementing noise reduction of a Bluetooth headset including:
  • the terminal When the voice data channel is turned on, the terminal sends an instruction to collect a noise signal to the Bluetooth headset;
  • the Bluetooth headset collects a noise signal and sends it to the terminal;
  • the terminal generates an inverted signal according to the noise signal and sends the signal to the Bluetooth headset;
  • the Bluetooth headset plays the inverted signal together with the music signal or voice signal.
  • generating the inverted signal according to the noise signal further comprises:
  • the signal processor calculates a frequency spectrum according to the noise signal, and generates an inverted signal with the opposite phase and the same amplitude;
  • the inverted signal is sent back to the terminal via the Bluetooth protocol.
  • a device for implementing Bluetooth headset noise reduction for a terminal, the Bluetooth headset includes at least one microphone, and the device includes:
  • the instruction sending module is configured to send an instruction for collecting a noise signal to the Bluetooth headset when the voice data channel is turned on;
  • the inverting signal generating module is configured to: after receiving the noise signal collected by the Bluetooth headset through the at least one microphone, generate an inverted signal according to the noise signal;
  • the inverting signal transmitting module is configured to send the generated inverted signal to the Bluetooth headset.
  • the inverted signal generating module is configured to: send the noise signal to the internal signal processor for processing by using a Bluetooth protocol; the signal processor calculates the frequency spectrum according to the noise signal, and generates an inverted signal with the opposite phase and the same amplitude; and the inverted signal is Send back to the terminal via the Bluetooth protocol.
  • the voice data channel comprises a music channel and a call channel.
  • the music channel is turned on
  • the device and the Bluetooth headset send and receive signals based on the A2DP protocol.
  • the call channel is turned on, the device and the Bluetooth headset transmit based on the HFP protocol. receive signal.
  • a device for implementing Bluetooth headset noise reduction is applied to a Bluetooth headset, the Bluetooth headset includes at least one microphone, and the device includes:
  • the noise signal collecting module is configured to: after receiving the instruction for collecting the noise signal sent by the terminal, collecting the noise signal through the at least one microphone and transmitting the signal to the terminal;
  • the inverting signal receiving module is configured to receive an inverted signal sent by the terminal;
  • the playback module is configured to play the received inverted signal together with the music signal or the voice signal.
  • the noise signal acquisition module is configured to acquire a noise signal by detecting low frequency noise in an environment that can be heard by the human ear.
  • the at least one microphone comprises a noise microphone for collecting noise signals.
  • the noise signal acquisition module is configured to: collect real-time or timed noise signals.
  • a system for implementing noise reduction of a Bluetooth headset comprising a terminal and a Bluetooth headset, wherein:
  • the terminal is configured to send an instruction for collecting a noise signal to the Bluetooth headset when the voice data channel is turned on; after receiving the noise signal collected by the Bluetooth headset, generate an inverted signal according to the noise signal and send the signal to the Bluetooth headset;
  • the Bluetooth headset is set to pass the microphone after receiving the instruction to collect the noise signal sent by the terminal.
  • the wind collects the noise signal and sends it to the terminal; after receiving the inverted signal sent by the terminal, the received inverted signal is played together with the music signal or the voice signal.
  • the terminal comprises a first device for implementing noise reduction of the Bluetooth headset, and the first device comprises:
  • the instruction sending module is configured to send an instruction for collecting a noise signal to the Bluetooth headset when the voice data channel is turned on;
  • the inverted signal generating module is configured to: after receiving the noise signal collected by the Bluetooth headset, generate an inverted signal according to the noise signal;
  • the inverting signal transmitting module is configured to send the generated inverted signal to the Bluetooth headset.
  • the inverted signal generating module is configured to: send the noise signal to the internal signal processor for processing by using a Bluetooth protocol; the signal processor calculates the frequency spectrum according to the noise signal, and generates an inverted signal with the opposite phase and the same amplitude; and the inverted signal is Send back to the terminal via the Bluetooth protocol.
  • the Bluetooth headset comprises a second device for implementing noise reduction of the Bluetooth headset, and the second device comprises:
  • the noise signal collecting module is configured to: after receiving the instruction for collecting the noise signal sent by the terminal, collecting the noise signal and transmitting the signal to the terminal;
  • the inverting signal receiving module is configured to receive an inverted signal sent by the terminal;
  • the playback module is configured to play the received inverted signal together with the music signal or the voice signal.
  • the method, device and system for realizing noise reduction of a Bluetooth earphone realize the noise reduction function of the Bluetooth earphone on the terminal side by means of software, without increasing the hardware cost of noise reduction of the Bluetooth earphone, so that the Bluetooth earphone has low cost and small volume ,Easy to carry.
  • FIG. 1 is a flowchart of a method for implementing noise reduction of a Bluetooth headset applied to a terminal according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for implementing Bluetooth headset noise reduction applied to a Bluetooth headset according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for implementing noise reduction of a Bluetooth headset according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for implementing noise reduction of a Bluetooth headset according to a preferred embodiment of the present invention
  • FIG. 5 is a flowchart of another method for implementing Bluetooth headset noise reduction using a Bluetooth headset according to a preferred embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a module for implementing a device for reducing noise of a Bluetooth headset applied to a terminal according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a module for implementing a Bluetooth headset to reduce noise by using a Bluetooth headset according to an embodiment of the present disclosure
  • FIG. 8 is a schematic structural diagram of a module for implementing a Bluetooth headset noise reduction system according to an embodiment of the present invention.
  • a method for implementing Bluetooth headset noise reduction according to an embodiment of the present invention is applied to a terminal, and the method includes the following steps:
  • the voice data channel includes, but is not limited to, playing a music channel and a call channel.
  • the terminal After the terminal establishes a connection with the Bluetooth headset, when the voice data channel is turned on, the terminal sends an instruction to collect the noise signal to the Bluetooth headset through the Bluetooth protocol stack, and the command is executed. Bluetooth headset captures noise.
  • the terminal after receiving the noise signal, the terminal sends the received noise signal through the Bluetooth protocol, and commands an internal signal processor (such as a digital singal processor, DSP) to process the signal.
  • the signal processor calculates its spectrum according to the noise signal, generates an inverted signal with the opposite phase and the same amplitude, and sends the inverted signal back to the terminal through the Bluetooth protocol, and the terminal sends the inverted signal to the Bluetooth headset through the Bluetooth protocol stack.
  • the terminal and the Bluetooth headset can transmit and receive signals based on the A2DP (Advanced Audio Distribution Profile) protocol
  • HFP Hands-free Profile, the protocol sends and receives signals.
  • the terminal is all electronic devices with Bluetooth function, including but not limited to mobile Mobile communication devices such as telephones, mobile phones, laptops, netbooks, portable tablets, and the like, such as MP3, MP4, PHP, PDA, digital TV, e-books, etc.
  • mobile Mobile communication devices such as telephones, mobile phones, laptops, netbooks, portable tablets, and the like, such as MP3, MP4, PHP, PDA, digital TV, e-books, etc.
  • a method for implementing Bluetooth headset noise reduction according to an embodiment of the present invention is applied to a Bluetooth headset, and the method includes the following steps:
  • S21 After receiving the instruction for collecting the noise signal sent by the terminal, collecting the noise signal and transmitting the signal to the terminal.
  • the Bluetooth headset After receiving the command, the Bluetooth headset starts detecting low-frequency noise (100-1000 Hz) in the environment that the human ear can hear, and collects a noise signal, preferably using a noise microphone (when there are at least two microphones) to collect noise. signal. And the collected noise signal is fed back to the terminal through the Bluetooth protocol stack.
  • the Bluetooth headset can transmit ambient noise through the microphone to the terminal in real time, thereby realizing the effect of real-time noise reduction, and can also periodically collect ambient noise and send it to the terminal.
  • the time interval can be comprehensively weighed the relationship between the noise reduction effect and the system resource occupancy. Settings can also be set by the user.
  • the Bluetooth headset when the music is played, the Bluetooth headset does not need to work normally, and the background environment noise can be collected in real time for real-time noise reduction. However, when the microphone is to work normally during the call, the command can only be received. After the noise data is collected once, the subsequent noise reduction of the noise signal collected this time has been performed, that is, the default is that the ambient noise is constant.
  • the Bluetooth headset plays the received inverted signal together with the music signal or the voice, so that the inverted signal can cancel the background noise signal, thereby achieving the purpose of eliminating noise.
  • the Bluetooth headset when the terminal uses the software to perform music reduction on the Bluetooth headset through the software, the Bluetooth headset may have only one microphone or multiple microphones.
  • the terminal uses the software to implement voice reduction for the Bluetooth headset, Bluetooth headsets only need to be equipped with more than two microphones, no need to equip the noise reduction circuit, making the Bluetooth headset low cost, small size and easy to carry.
  • a method for implementing Bluetooth headset noise reduction includes the following steps:
  • the terminal sends an instruction for collecting a noise signal to the Bluetooth headset.
  • the voice data channel includes, but is not limited to, playing a music channel and a call channel.
  • the terminal After the terminal establishes a connection with the Bluetooth headset, when the voice data channel is turned on, the terminal sends an instruction to collect the noise signal to the Bluetooth headset through the Bluetooth protocol stack, and the command is executed. Bluetooth headset captures noise.
  • the Bluetooth headset collects a noise signal and sends it to the terminal;
  • the Bluetooth headset After receiving the command, the Bluetooth headset starts detecting low-frequency noise (100-1000 Hz) in the environment that the human ear can hear, and collects a noise signal, preferably using a noise microphone to collect the noise signal. And the collected noise signal is fed back to the terminal through the Bluetooth protocol stack.
  • the Bluetooth headset can transmit ambient noise through the microphone to the terminal in real time, thereby realizing the effect of real-time noise reduction, and can also periodically collect ambient noise and send it to the terminal.
  • the time interval can be comprehensively weighed the relationship between the noise reduction effect and the system resource occupancy. Settings can also be set by the user.
  • the Bluetooth headset when the music is played, the Bluetooth headset does not need to work normally, and the background environment noise can be collected in real time for real-time noise reduction. However, when the microphone is to work normally during the call, the command can only be received. After the noise data is collected once, the subsequent noise reduction of the noise signal collected this time has been performed, that is, the default is that the ambient noise is constant.
  • the terminal generates an inverted signal according to the noise signal, and sends the inverted signal to the Bluetooth headset.
  • the terminal after receiving the noise signal, the terminal sends the received noise signal through the Bluetooth protocol, and commands the internal signal processor (such as DSP) to process.
  • the signal processor calculates its spectrum according to the noise signal, generates an inverted signal with the opposite phase and the same amplitude, and sends the inverted signal back to the terminal through the Bluetooth protocol, and the terminal sends the inverted signal to the Bluetooth headset through the Bluetooth protocol stack.
  • the terminal and the Bluetooth headset can transmit and receive signals based on the A2DP protocol
  • the terminal and the Bluetooth headset can transmit and receive signals based on the HFP protocol.
  • the Bluetooth headset plays the inverted signal together with the music signal or the voice signal.
  • the method of the embodiment of the invention implements the noise reduction function of the Bluetooth headset on the terminal side by means of software, without increasing the hardware cost of the Bluetooth earphone noise reduction, the volume is small, and the carrying is convenient.
  • the embodiment of the present invention implements a function of playing music noise reduction by a Bluetooth headset with one microphone or multiple microphones.
  • the method for implementing Bluetooth headset noise reduction includes the following steps:
  • the terminal sends an instruction to collect a noise signal to the Bluetooth headset.
  • the terminal can send an instruction to collect the noise signal to the Bluetooth headset through the Bluetooth protocol stack.
  • the Bluetooth headset collects the noise signal and sends it to the terminal.
  • the Bluetooth headset After receiving the instruction, the Bluetooth headset starts the microphone disposed in the earphone to detect low frequency noise (100-1000 Hz) in the environment that the human ear can hear, starts collecting noise signals, and feeds back to the terminal through the Bluetooth protocol stack.
  • the Bluetooth headset can transmit ambient noise through the microphone to the terminal in real time, thereby realizing the effect of real-time noise reduction, and can also periodically collect ambient noise and send it to the terminal, thereby comprehensively balancing the noise reduction effect and system resource occupation, and the time interval can be set by the system. It can also be set by the user.
  • the terminal generates an inverted signal according to the noise signal, and sends the inverted signal to the Bluetooth headset.
  • the terminal after receiving the noise data, the terminal sends the received noise signal through the A2DP protocol, and commands the internal signal processor (such as DSP) to process.
  • the signal processor calculates its spectrum according to the noise signal, generates an inverted signal with the opposite phase and the same amplitude, and sends the inverted signal back to the terminal through the A2DP protocol, and the terminal sends the inverted signal to the Bluetooth headset through the Bluetooth protocol stack.
  • the Bluetooth headset plays the inverted signal together with the music signal.
  • the Bluetooth headset plays the inverted signal together with the music signal, so that the inverted signal can cancel the background noise signal, thereby achieving the purpose of eliminating noise.
  • the method of the embodiment of the invention implements the function of playing the music noise reduction of the Bluetooth headset on the terminal side by means of software, without increasing the hardware cost, small volume and convenient carrying.
  • the embodiment of the present invention implements a Bluetooth headset call noise reduction function with a noise reduction microphone, and the method for implementing Bluetooth headset noise reduction includes the following steps:
  • the terminal sends an instruction to collect a noise signal to the Bluetooth headset.
  • the terminal After the terminal establishes a connection with the Bluetooth headset, when the call channel is opened, the terminal passes the Bluetooth.
  • the protocol stack sends an instruction to collect a noise signal to the Bluetooth headset, and commands the Bluetooth headset to collect noise.
  • the Bluetooth headset collects a noise signal and sends it to the terminal.
  • the Bluetooth headset After receiving the instruction, the Bluetooth headset starts the noise reduction microphone to detect the low frequency noise (100-1000 Hz) in the environment that the ear can hear, starts collecting noise, and sends the collected noise signal back to the terminal through the Bluetooth protocol stack. Since the Bluetooth headset has a noise reduction microphone, since the noise reduction microphone does not participate in the call work, the noise can be collected in real time through the noise reduction microphone and fed back to the terminal, thereby realizing the effect of real-time noise reduction, and also periodically collecting ambient noise and transmitting to the terminal. With balanced noise reduction and system resource occupation, the time interval for timing transmission can be set by the system or set by the user.
  • the terminal generates an inverted signal according to the noise signal, and sends the inverted signal to the Bluetooth headset.
  • the terminal After receiving the collected noise signal, the terminal passes the data to the signal processor (such as DSP) in the terminal through the HFP protocol, and commands the internal signal processor to generate an inverted signal.
  • the internal signal processor of the terminal calculates its spectrum according to the collected data, generates a signal with the opposite phase and the same amplitude, and sends the generated inverted signal to the terminal through the HFP protocol.
  • the inverted signal is sent to the Bluetooth headset by the terminal through the Bluetooth protocol stack.
  • the Bluetooth headset plays the inverted signal together with the voice signal.
  • the Bluetooth headset plays the inverted signal together with the voice signal, so that the inverted signal can cancel the background noise signal, thereby achieving the purpose of eliminating noise.
  • the Bluetooth headset is equipped with two or more microphones, and the noise reduction microphone is used to collect the noise signal, and the noise reduction function during the call is realized by the software mode, so that the hardware cost is not required in the terminal, and the cost of the Bluetooth headset is low. Small size and carrying.
  • an apparatus for implementing noise reduction of a Bluetooth headset is applied to a terminal, where the apparatus includes an instruction sending module 101, an inversion signal generating module 102, and an inversion signal sending module 103, where:
  • the command sending module 101 is configured to send an instruction to collect a noise signal to the Bluetooth headset when the voice data path is turned on.
  • the inverted signal generating module 102 is configured to generate an inverted signal according to the noise signal after receiving the noise signal collected by the Bluetooth headset.
  • the inverted signal generating module 102 is specifically configured to: send the noise signal to an internal signal processor (such as a DSP) for processing by using a Bluetooth protocol; the signal processor calculates a frequency spectrum according to the noise signal, and generates a reverse phase with the same phase and the same amplitude. Phase signal; the inverted signal is sent back to the terminal via the Bluetooth protocol.
  • an internal signal processor such as a DSP
  • the signal processor calculates a frequency spectrum according to the noise signal, and generates a reverse phase with the same phase and the same amplitude. Phase signal
  • the inverted signal is sent back to the terminal via the Bluetooth protocol.
  • the inverted signal transmitting module 103 is configured to send the generated inverted signal to the Bluetooth headset.
  • an apparatus for implementing Bluetooth headset noise reduction is applied to a Bluetooth headset, and the device includes a noise signal acquisition module 201, an inversion signal receiving module 202, and a playback module 203, where:
  • the noise signal collecting module 201 is configured to collect a noise signal and send the signal to the terminal after receiving the instruction for collecting the noise signal sent by the terminal.
  • the inverted signal receiving module 202 is configured to receive an inverted signal sent by the terminal.
  • the playing module 203 is configured to play the received inverted signal together with the music signal or the voice signal.
  • a system for implementing Bluetooth headset noise reduction includes a first device 10 for implementing Bluetooth headset noise reduction applied to a terminal, and a Bluetooth headset for noise reduction applied to the Bluetooth headset.
  • the first device 10 further includes an instruction transmitting module 101, an inverted signal generating module 102, and an inverted signal transmitting module 103, wherein:
  • the command sending module 101 is configured to send an instruction for collecting a noise signal to the Bluetooth headset when the voice data path is turned on;
  • the inverting signal generating module 102 is configured to: after receiving the noise signal collected by the Bluetooth headset, generate an inverted signal according to the noise signal;
  • the inverted signal transmitting module 103 is configured to send the generated inverted signal to the Bluetooth headset.
  • the inverted signal generating module 102 is specifically configured to: send the noise signal to the internal signal processing (such as DSP) for processing through the A2DP protocol or the HFP protocol; the signal processing calculates the frequency spectrum according to the noise signal, and generates the opposite phase and the same amplitude. Inverting signal; passing the inverted signal through the Bluetooth protocol Send it back to the terminal.
  • the internal signal processing such as DSP
  • the signal processing calculates the frequency spectrum according to the noise signal, and generates the opposite phase and the same amplitude.
  • Inverting signal passing the inverted signal through the Bluetooth protocol Send it back to the terminal.
  • the second device 20 further includes: a noise signal collecting module 201, an inverted signal receiving module 202, and a playing module 203, where:
  • the noise signal collecting module 201 is configured to: after receiving the instruction for collecting the noise signal sent by the terminal, collecting the noise signal and transmitting the signal to the terminal;
  • the inverting signal receiving module 202 is configured to receive an inverted signal sent by the terminal;
  • the playing module 203 is configured to play the received inverted signal together with the music signal or the voice signal.
  • the terminal is all electronic devices with Bluetooth functions, including but not limited to mobile communication devices such as mobile phones, mobile phones, notebook computers, netbooks, portable tablets, and the like, and MP3, MP4, PHP, PDA, digital television. , electronic devices such as e-books.
  • the method, device and system for realizing noise reduction of a Bluetooth earphone provided by the invention realize the noise reduction function of the bluetooth earphone on the terminal side by means of software, without increasing the hardware cost of noise reduction of the bluetooth earphone, so that the bluetooth earphone has low cost and small volume, Easy to carry.
  • the method, device and system for realizing noise reduction of a Bluetooth earphone provided by the invention realize the noise reduction function of the bluetooth earphone on the terminal side by means of software, without increasing the hardware cost of noise reduction on the side of the bluetooth earphone, so that the cost of the bluetooth earphone is low and the volume Small and easy to carry.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Telephone Function (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

La présente invention concerne le domaine technique des dispositifs électroniques. L'invention concerne un procédé, un dispositif et un système de réduction de bruit de casque d'écoute Bluetooth. Le procédé comporte les étapes suivantes : quand un canal de données vocales est ouvert, un terminal envoie une instruction d'acquisition de signaux de bruit à un casque d'écoute Bluetooth ; le casque d'écoute Bluetooth effectue l'acquisition de signaux de bruit par l'intermédiaire d'un microphone et envoie les signaux de bruit au terminal ; le terminal génère des signaux à phase inversée en fonction des signaux de bruit et envoie les signaux à phase inversée au casque d'écoute Bluetooth ; le casque d'écoute Bluetooth lit les signaux à phase inversée avec des signaux de musique ou des signaux vocaux. Le mode de réalisation de la présente invention met en œuvre une réduction de bruit du casque d'écoute Bluetooth du côté terminal par le biais d'un logiciel, ceci permettant un casque d'écoute Bluetooth de faible coût, de petite taille et pratique à transporter.
PCT/CN2015/074547 2014-03-20 2015-03-18 Procédé, dispositif et système de réduction de bruit de casque d'écoute bluetooth WO2015139642A1 (fr)

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