CN104092801A - Intelligent terminal call noise reduction method and intelligent terminal - Google Patents

Intelligent terminal call noise reduction method and intelligent terminal Download PDF

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Publication number
CN104092801A
CN104092801A CN201410219218.6A CN201410219218A CN104092801A CN 104092801 A CN104092801 A CN 104092801A CN 201410219218 A CN201410219218 A CN 201410219218A CN 104092801 A CN104092801 A CN 104092801A
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CN
China
Prior art keywords
terminal
noise
rest state
voice
ambient noise
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CN201410219218.6A
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Chinese (zh)
Inventor
吴浩明
籍国兴
李小棠
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中兴通讯股份有限公司
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Priority to CN201410219218.6A priority Critical patent/CN104092801A/en
Publication of CN104092801A publication Critical patent/CN104092801A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/19Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor

Abstract

The invention discloses an intelligent terminal call noise reduction method comprising the following steps: a first terminal acquires call speech and ambient noise at the start of speech call; the first terminal judges whether the first terminal is in a quiet state according to the acquired call speech and/or ambient noise; noise reduction is performed on the call speech according to ambient noise sent by a second terminal if the first terminal is not in a quiet state; and noise reduction is not performed if the first terminal is in a quiet state. The invention further discloses an intelligent terminal. The problem that call is susceptible to interference of ambient noise as an intelligent terminal, especially a wearable intelligent terminal, is compact in structure and cannot be equipped with a plurality of microphones to perform de-noising is effectively solved.

Description

Intelligent terminal call noise-reduction method and intelligent terminal
Technical field
The present invention relates to communication technical field, relate in particular to a kind of noise-reduction method and intelligent terminal of intelligent terminal.
Background technology
Intelligent terminal, particularly dresses intelligent terminal (for example, intelligent watch, intelligent glasses etc.) as a kind of novel intelligent terminal, can be worn on easily people's particular body portion.Existing wearing intelligent terminal has generally all possessed wireless communication function, it is normally used under special environment, for example, when people's both hands cannot hold or operating mobile terminal (for example, mobile phone, panel computer etc.) time, communicate with direct and other-end equipment by using this class to dress intelligent terminal, greatly expanded the scene of people people's voice calls.But, be limited to wearing intelligent terminal general structure smaller and more exquisite, cannot arrange by multiple MIC (Microphone, microphone) composition array carry out denoising Processing, therefore, the call that this class is dressed intelligent terminal is subject to environmental noise interference conventionally, and especially, under more noisy environment, speech quality can not effectively be ensured.
Foregoing only, for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Summary of the invention
Main purpose of the present invention is to provide a kind of noise-reduction method and intelligent terminal of intelligent terminal, is intended to solve existing intelligent terminal, particularly dresses intelligent terminal because of the little problem that cannot carry out denoising Processing of volume.
In order to achieve the above object, the present invention proposes a kind of method of intelligent terminal call noise reduction, comprising:
In the time that voice communication starts, first terminal gathers call voice and ambient noise;
First terminal according to the call voice of its collection or/and ambient noise judge whether in rest state;
If described first terminal is not in rest state, the ambient noise that described first terminal sends over according to described the second terminal is carried out noise reduction process to call voice;
If described first terminal, in rest state, does not do noise reduction process.
Preferably, described first terminal according to the call voice of its collection or/and ambient noise judge whether to comprise in the step of rest state:
Draw signal to noise ratio according to the call voice of described first terminal collection and ambient noise;
Be more than or equal to preset value if described signal to noise ratio is greater than, described first terminal is in rest state.
Preferably, described first terminal according to the call voice of its collection or/and ambient noise judge whether to comprise in the step of rest state:
Draw the amplitude of ambient noise according to the ambient noise of described first terminal collection;
If described ambient noise range value is less than default noise signal amplitude threshold values, described first terminal is in rest state.
Preferably, if described first terminal not in rest state, the step that the ambient noise that described first terminal sends over according to described the second terminal is carried out noise reduction process to call voice comprises:
If described first terminal not in rest state, is set up the voice link with described the second terminal, the microphone that starts described the second terminal gathers ambient noise;
The ambient noise that described first terminal sends over according to described the second terminal is carried out noise reduction process.
Preferably, described first terminal does not carry out noise reduction process in rest state, or described first terminal also comprises after rest state is not carried out the step of noise reduction process:
Whether its environment of living in of described first terminal Real-Time Monitoring is rest state, judges whether to carry out noise reduction to call voice;
If described first terminal, in unpeace state, carries out noise reduction process to call voice;
If described first terminal, in rest state, does not carry out noise reduction process to call voice.
Preferably, after the main microphone of described first terminal gathers the step of call voice and ambient noise, also comprise:
Described first terminal is set up the lasting voice link with described the second terminal, and the microphone of described the second terminal constantly sends to described first terminal by the ambient noise collecting.
The present invention further proposes a kind of intelligent terminal, comprising:
Sound collection unit, in the time that voice communication starts, gathers call voice and ambient noise;
Rest state judging unit, for the call voice that gathers according to described main microphone or/and ambient noise judge whether in rest state;
Voice de-noising output unit, at described first terminal during not in rest state, the ambient noise sending over according to described the second terminal is carried out noise reduction process to call voice;
Voice-output unit, at described first terminal in rest state, call voice is not done to noise reduction process.
Preferably, described rest state judging unit is used for:
Draw signal to noise ratio according to the call voice of described first terminal collection and ambient noise;
If described signal to noise ratio is more than or equal to preset value, described first terminal is in rest state
Preferably, described rest state judging unit is used for:
Draw the amplitude of ambient noise according to the ambient noise of described first terminal collection;
If described ambient noise range value is less than default noise signal amplitude threshold values, described first terminal is in rest state.
Preferably, described voice de-noising output unit comprises:
Link is enabled module, at described first terminal during not in rest state, sets up and the voice link of described the second terminal, and the microphone that starts described the second terminal gathers ambient noise;
Noise reduction output module, carries out noise reduction process for the ambient noise sending over according to described the second terminal to call voice.
Preferably, described intelligent terminal also comprises:
Whether Real-Time Monitoring unit, be rest state for the environment of living in of first terminal described in Real-Time Monitoring, judges whether to carry out noise reduction to call voice;
If described first terminal, in unpeace state, carries out noise reduction process to call voice;
If described first terminal, in rest state, does not carry out noise reduction process to call voice.
Preferably, described intelligent terminal also comprises:
Durable link is set up unit, and for setting up and the lasting voice link of described the second terminal, the microphone of described the second terminal constantly sends to described first terminal by the ambient noise collecting.
The present invention proposes a kind of noise-reduction method and intelligent terminal of intelligent terminal, gathers call voice and ambient noise by first terminal, and according to gather call voice or/and ambient noise judge whether in rest state; If first terminal is in rest state, according to the second terminal collection the ambient noise (likely comprising slight speech sound waves signal) that sends over, call voice is carried out to DSP (digital siganal process) de-noising or noise reduction process; If first terminal, in rest state, does not do noise reduction process, thereby efficiently solve because of intelligent terminal structure small and exquisitely, multiple microphones cannot be set and carry out denoising Processing, call is subject to the problem that environmental noise disturbs.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of noise-reduction method first embodiment of intelligent terminal of the present invention;
Fig. 2 is the schematic flow sheet of noise-reduction method second embodiment of intelligent terminal of the present invention;
Fig. 3 is the schematic flow sheet of noise-reduction method the 3rd embodiment of intelligent terminal of the present invention;
Fig. 4 is the schematic flow sheet of noise-reduction method the 4th embodiment of intelligent terminal of the present invention;
Fig. 5 is the schematic flow sheet of noise-reduction method the 5th embodiment of intelligent terminal of the present invention;
Fig. 6 is the high-level schematic functional block diagram of intelligent terminal the first embodiment of the present invention;
Fig. 7 is the high-level schematic functional block diagram of intelligent terminal the second embodiment of the present invention;
Fig. 8 is the high-level schematic functional block diagram of intelligent terminal of the present invention the 3rd embodiment;
Fig. 9 is the high-level schematic functional block diagram of intelligent terminal of the present invention the 4th embodiment;
Figure 10 is the high-level schematic functional block diagram of intelligent terminal of the present invention the 5th embodiment;
Figure 11 is intelligent terminal specific implementation structural representation of the present invention.
In order to make technical scheme of the present invention clearer, clear, be described in further detail below in conjunction with accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of method of intelligent terminal call noise reduction.
Referring to Fig. 1, Fig. 1 is the schematic flow sheet of noise-reduction method first embodiment of intelligent terminal of the present invention.
In the first embodiment, the method for intelligent terminal call noise reduction, comprising:
Step S101, in the time that voice communication starts, first terminal gathers call voice and ambient noise;
Microphone in example one, first terminal is as main microphone, in communication process, first terminal gathers call voice and ambient noise, preferably, the user of first terminal in the time speaking state, gather call voice signal and ambient noise signal by main microphone, wherein the amplitude of call voice signal, generally much larger than the amplitude of ambient noise signal, is got the amplitude peak of gathered call voice signal and ambient noise signal morbid sound signal as call voice signal; In the time listening the other side to speak state, gather ambient noise signal by main microphone the user of first terminal, then the call voice signal of collection and ambient noise signal are sent to the processor of first terminal.
Microphone in example two, first terminal is as main microphone, in communication process, first terminal gathers call voice and ambient noise, preferably, the user of first terminal in the time speaking state, gather call voice signal and ambient noise signal by main microphone, wherein the amplitude of call voice signal is generally much larger than the amplitude of ambient noise signal, get the amplitude peak of gathered call voice signal and ambient noise signal morbid sound signal as call voice signal, and the call voice signal of collection is sent to the processor of first terminal; In the time listening the other side to speak state, gather ambient noise signal by main microphone the user of first terminal, and the ambient noise signal of collection is sent to the processor of first terminal.
Step S102, first terminal according to the call voice of its collection or/and ambient noise judge whether in rest state;
First terminal judges whether to have in the mode of rest state multiple, for example:
Example one, first terminal draw signal to noise ratio (signal to noise ratio=10LG (Ps/Pn) compared with the amplitude peak of call voice signal of its collection and the amplitude peak of ambient noise signal, wherein effective power or the amplitude of Ps and Pn difference representation signal and noise, unit of measurement is decibel), for example, if the call voice signal to noise ratio of main microphone collection (is more than or equal to default signal to noise ratio threshold values, 6 decibels), judge that first terminal is in rest state;
Example two, first terminal are determined unit interval (for example 100ms) the interior maximum acoustic signal amplitude of the ambient noise gathering, if determine, in the ambient noise unit interval, maximum acoustic signal amplitude value is less than default ambient noise amplitude threshold values (for example 40 decibels), judges that first terminal is in rest state.
Step S103, if first terminal not in rest state, the ambient noise that first terminal sends over according to the second terminal is carried out noise reduction process to call voice;
If the processor of first terminal judges that it is not in rest state, be that first terminal is under comparatively noisy environment, first terminal reaches processor by the ambient noise of the secondary microphone collection of the second terminal receiving, wherein, the audio signal that the second terminal collects its secondary microphone is carried out A/D (Analog/digital) conversion, it is analog-to-digital conversion, process with coding, and being sent to first terminal by wireless communication apparatus, this wireless communication apparatus comprises the Near Field Communication devices such as bluetooth, WIFI (Wireless Fidelity), near-field communication.Call voice and ambient noise that the comprehensive main microphone of processor of first terminal gathers, and the ambient noise of secondary microphone collection, call voice is carried out to noise reduction process, for example adopt DSP (digital siganal process) algorithm to carry out de-noising or noise reduction process to call voice, call voice after finally coding output noise reduction, to base station, then gives by base-station transmission the equipment of conversing with first terminal
In order to reduce the noise of signal in transmitting procedure, improve quality of voice transmission, the method that DSP algorithm can adopt three kinds of general voice to strengthen mostly: first, be to disturb subtractive method, suppress noise by cutting noise spectrum; Secondly, be that harmonic frequency suppresses method, the method for utilizing voice to strengthen completes noise abatement, and the periodicity principle based on noise utilizes the self-adapting comb filtering enforcement fundamental frequency of harmonic noise to follow the tracks of noise reduction; The 3rd, be to utilize vocoder synthetic method again, it utilizes iterative method, and on the basis of pronunciation modeling, estimation model parameter, uses the method for describing voice signal again to synthesize noise-free signal again.
Step S104, if first terminal, in rest state, does not carry out noise reduction process.
If the processor of first terminal judges that it is in rest state, first terminal is under comparatively quiet environment, and first terminal is without carrying out denoising Processing to call voice, and direct coding exports the equipment of communicating by letter with first terminal to.
In the present embodiment, the present invention proposes a kind of noise-reduction method of intelligent terminal, gathers call voice and ambient noise by first terminal, and according to gather call voice or/and ambient noise judge whether in rest state; If first terminal is in rest state, according to the second terminal collection the ambient noise (likely comprising slight speech sound waves signal) that sends over, call voice is carried out to DSP (digital siganal process) de-noising or noise reduction process; If first terminal, in rest state, does not carry out noise reduction process.The audio signal that first terminal processor sends the second terminal like this and the main microphone of himself collect audio signal and carry out DSP denoising Processing, because main microphone separates with secondary microphone, distance, when call, the main microphone collection of first terminal is mainly user's communication voice and environmental noise, and the secondary microphone collection of the second terminal is mainly environmental noise, the audio signal signal to noise ratio difference that both gather is larger, after treated device DSP algorithm process, can eliminate preferably ambient noise, holding voice signal, improve speech quality, thereby efficiently solve because of intelligent terminal, particularly dress intelligent terminal structure small and exquisite, multiple microphones cannot be set and carry out denoising Processing, call is subject to the problem that environmental noise disturbs.
Referring to Fig. 2, Fig. 2 is the schematic flow sheet of noise-reduction method second embodiment of intelligent terminal of the present invention.
On the basis of the first embodiment, step S103 comprises
Step S1031, if first terminal, not in rest state, is set up and the voice link of the second terminal, the microphone that starts the second terminal gathers ambient noise;
If first terminal is not in rest state, the wireless communication apparatus of the wireless communication apparatus of first terminal and the second terminal is set up voice link, and starts the secondary microphone collection ambient noise of the second terminal.
Step S1032, the ambient noise that first terminal sends over according to the second terminal is carried out noise reduction process to call voice.
Ambient noise A/D conversion and coding that the second terminal gathers its secondary microphone, and send to first terminal by wireless communication apparatus, the call voice after first terminal coding output noise reduction.
In the present embodiment, first terminal is according to the result of determination of rest state, set up voice link with the second terminal selectively, if first terminal is not in rest state, the voice link of foundation and the second terminal, the microphone that starts the second terminal gathers ambient noise, and call voice is carried out to noise reduction process, can real-time judgment first terminal environment of living in whether in rest state, thereby whether real-time judgment carries out noise reduction process to call voice.
Referring to Fig. 3, Fig. 3 is the schematic flow sheet of noise-reduction method the 3rd embodiment of intelligent terminal of the present invention.
On the basis of the second embodiment, step S104 comprises
Step S1041, if first terminal in rest state, the microphone of cutting out the second terminal stops gathering ambient noise, disconnects and the voice link of the second terminal;
If first terminal is in rest state, the secondary microphone of Long-distance Control the second terminal stops gathering ambient noise, and controls the voice link of its wireless communication apparatus disconnection and the second terminal.
Step S1042, first terminal direct coding is exported the call voice of its collection.
First terminal does not carry out noise reduction process to the call voice gathering, the call voice that Direct Programming output gathers.
In the present embodiment, the second terminal coordinates first terminal to close and opening voice link, and whether to realize real-time judgment first terminal environment of living in rest state, thereby whether real-time judgment carries out noise reduction process to call voice.
Referring to Fig. 4, Fig. 4 is the schematic flow sheet of noise-reduction method the 4th embodiment of intelligent terminal of the present invention.
On the basis of the first embodiment, after step S101, also comprise:
Step S105, first terminal is set up the lasting voice link with the second terminal, and the microphone of the second terminal constantly sends to first terminal by the ambient noise collecting.
After first terminal gathers call voice and ambient noise, first terminal is set up the lasting voice link with the second terminal, no longer carry out the opening and closing of voice link, the secondary microphone of the second terminal constantly sends to first terminal by the ambient noise collecting, judge that when first terminal it is under rest state, reject the ambient noise audio frequency that the second terminal sends over; Judge that when first terminal it is under unpeace state, receive the ambient noise audio frequency that the second terminal sends over, then call voice is carried out to noise reduction process.
In the present embodiment, first terminal is set up the lasting voice link with the second terminal, first terminal no longer carries out the opening and closing of voice link, has reduced the holding time of first terminal processor, has improved to a certain extent the efficiency of call voice being carried out to noise reduction process.
In addition, except in the present embodiment, step S105 is after step S101, and step S105 also can be before step S101, and the technique effect reaching is just the same, does not do tired stating at this.
Referring to Fig. 5, Fig. 5 is the schematic flow sheet of noise-reduction method the 5th embodiment of intelligent terminal of the present invention.
On the basis of the first embodiment, after step S103 or step S104, also comprise:
Step S106, whether its environment of living in of first terminal Real-Time Monitoring is rest state, judges whether to carry out noise reduction to call voice;
If described first terminal, in unpeace state, carries out noise reduction process to call voice;
If described first terminal, in rest state, does not carry out noise reduction process to call voice.
In the present embodiment, no matter first terminal determines whether rest state to its residing environment, whether call voice is carried out to noise reduction process, in follow-up communication process, all continue whether the current environment of monitoring is rest state, and enter noise reduction process or exit noise reduction process according to the ambient conditions judgement of follow-up Real-Time Monitoring, in real time call voice is correctly processed thereby realized in communication process, call voice is carried out to noise reduction process at unpeace state, call voice is not carried out to noise reduction process in rest state, and then the speech quality of guarantee call voice in whole communication process.
Referring to Fig. 6, Fig. 6 is the high-level schematic functional block diagram of intelligent terminal the first embodiment of the present invention.
The present invention further proposes a kind of intelligent terminal, comprising:
Sound collection unit 101, in the time that voice communication starts, gathers call voice and ambient noise;
Microphone in example one, first terminal is as main microphone, in communication process, sound collection unit 101 gathers call voice and ambient noise, preferably, the user of first terminal in the time speaking state, gather call voice signal and ambient noise signal by main microphone, wherein the amplitude of call voice signal, generally much larger than the amplitude of ambient noise signal, is got the amplitude peak of gathered call voice signal and ambient noise signal morbid sound signal as call voice signal; In the time listening the other side to speak state, gather ambient noise signal by sound collection unit 101 the user of first terminal, then the call voice signal of collection and ambient noise signal are sent to the processor of first terminal.
Microphone in example two, first terminal is as main microphone, in communication process, sound collection unit 101 gathers call voice and ambient noise, preferably, the user of first terminal in the time speaking state, gather call voice signal and ambient noise signal by main microphone, wherein the amplitude of call voice signal is generally much larger than the amplitude of ambient noise signal, get the amplitude peak of gathered call voice signal and ambient noise signal morbid sound signal as call voice signal, and the call voice signal of collection is sent to the processor of first terminal; , in the time listening the other side to speak state, gather ambient noise signal by sound collection unit 101, and the ambient noise signal of collection is sent to the processor of first terminal the user of first terminal.
Rest state judging unit 102, for the call voice that gathers according to main microphone or/and ambient noise judge whether in rest state;
First terminal judges whether to have in the mode of rest state multiple, for example:
Example one, rest state judging unit 102 draw signal to noise ratio (signal to noise ratio=10LG (Ps/Pn) compared with the amplitude peak of call voice signal of its collection and the amplitude peak of ambient noise signal, wherein effective power or the amplitude of Ps and Pn difference representation signal and noise, unit of measurement is decibel), for example, if the call voice signal to noise ratio of main microphone collection (is more than or equal to default signal to noise ratio threshold values, 6 decibels), judge that first terminal is in rest state;
Example two, rest state judging unit 102 are determined unit interval (for example 100ms) the interior maximum acoustic signal amplitude of the ambient noise gathering, if determine, in the ambient noise unit interval, maximum acoustic signal amplitude value is less than default ambient noise amplitude threshold values (for example 40 decibels), judges that first terminal is in rest state.
Voice de-noising output unit 103, at first terminal during not in rest state, the ambient noise sending over according to the second terminal is carried out noise reduction process to call voice;
If rest state judging unit 102 judges that it is not in rest state, be that first terminal is under comparatively noisy environment, the ambient noise of the secondary microphone collection of the second terminal receiving is reached processor by 103 of voice de-noising output units, wherein, the audio signal that the second terminal collects its secondary microphone is carried out A/D (Analog/digital) conversion, it is analog-to-digital conversion, process with coding, and be sent to first terminal by wireless communication apparatus, this wireless communication apparatus comprises bluetooth, WIFI (Wireless Fidelity), the Near Field Communication devices such as near-field communication.Call voice and ambient noise that the comprehensive main microphone of processor of voice de-noising output unit 103 gathers, and the ambient noise of secondary microphone collection, call voice is carried out to noise reduction process, for example adopt DSP (digital siganal process) algorithm to carry out de-noising or noise reduction process to call voice, the call voice after finally coding output noise reduction is to the equipment of communicating by letter with first terminal.
In order to reduce the noise of signal in transmitting procedure, improve quality of voice transmission, the method that DSP algorithm can adopt three kinds of general voice to strengthen mostly: first, be to disturb subtractive method, suppress noise by cutting noise spectrum; Secondly, be that harmonic frequency suppresses method, the method for utilizing voice to strengthen completes noise abatement, and the periodicity principle based on noise utilizes the self-adapting comb filtering enforcement fundamental frequency of harmonic noise to follow the tracks of noise reduction; The 3rd, be to utilize vocoder synthetic method again, it utilizes iterative method, and on the basis of pronunciation modeling, estimation model parameter, uses the method for describing voice signal again to synthesize noise-free signal again.
Voice-output unit 104, at first terminal in rest state, call voice is not done to noise reduction process.
If rest state judging unit 102 devices judge that first terminal is in rest state, be that first terminal is under comparatively quiet environment, first terminal is without call voice is carried out to denoising Processing, and voice-output unit 104 directly exports call voice coding to communicate by letter with first terminal equipment.
In the present embodiment, the present invention proposes a kind of intelligent terminal, gathers call voice and ambient noise by sound collection unit 101, rest state judging unit 102 according to gather call voice or/and ambient noise judge whether in rest state; If first terminal is not in rest state, 103 of voice de-noising output units carry out DSP (digital siganal process) de-noising or noise reduction process to call voice, the call voice after coding output noise reduction according to the second terminal collection the ambient noise (likely comprising slight speech sound waves signal) that sends over; If first terminal is in rest state, the call voice that 104 direct coding output sound collecting units 101 of voice-output unit gather.The audio signal that first terminal processor sends the second terminal like this and the main microphone of himself collect audio signal and carry out DSP denoising Processing, because main microphone separates with secondary microphone, distance, when call, the main microphone collection of first terminal is mainly user's communication voice and environmental noise, and the secondary microphone collection of the second terminal is mainly environmental noise, the audio signal signal to noise ratio difference that both gather is larger, after treated device DSP algorithm process, can eliminate preferably ambient noise, holding voice signal, improve speech quality, thereby efficiently solve because of intelligent terminal, particularly dress intelligent terminal structure small and exquisite, multiple microphones cannot be set and carry out denoising Processing, call is subject to the problem that environmental noise disturbs.
Referring to Fig. 7, Fig. 7 is the high-level schematic functional block diagram of intelligent terminal the second embodiment of the present invention.
The voice de-noising output unit 103 of intelligent terminal comprises:
Link is enabled module 1031, at first terminal during not in rest state, sets up and the voice link of the second terminal, and the microphone that starts the second terminal gathers ambient noise;
If first terminal is in rest state, the wireless communication apparatus that link is enabled module 1031 and the second terminal is set up voice link, and the secondary microphone that starts the second terminal gathers ambient noise.
Noise reduction output module 1032, carries out noise reduction process for the ambient noise sending over according to the second terminal.
Ambient noise A/D conversion and coding that the second terminal gathers its secondary microphone, and send to first terminal by wireless communication apparatus, the ambient noise that module 1032 sends over according to the second terminal is carried out noise reduction process.
In the present embodiment, link is enabled module 1031 according to the result of determination of the rest state of first terminal, set up voice link with the second terminal selectively, if first terminal is not in rest state, set up the voice link with the second terminal, the microphone that starts the second terminal gathers ambient noise, noise reduction output module 1032 carries out noise reduction process to call voice, call voice after coding output noise reduction again, can real-time judgment first terminal environment of living in whether in rest state, thereby whether real-time judgment carries out noise reduction process to call voice.
Referring to Fig. 8, Fig. 8 is the high-level schematic functional block diagram of intelligent terminal of the present invention the 3rd embodiment.
The voice-output unit 104 of intelligent terminal comprises:
Link-down module 1041, at first terminal during in rest state, the microphone of cutting out the second terminal stops gathering ambient noise, disconnects the voice link with the second terminal;
If first terminal is in rest state, the secondary microphone of 1041 Long-distance Control the second terminals of link-down module stops gathering ambient noise, and controls the voice link of its wireless communication apparatus disconnection and the second terminal.
Directly output module 1042, exports the call voice of its collection for direct coding.
First terminal does not carry out noise reduction process to the call voice gathering, the call voice that directly 1042 Direct Programming outputs of output module gather.
In the present embodiment, the second terminal coordinates first terminal to close and opening voice link, and whether to realize real-time judgment first terminal environment of living in rest state, thereby whether real-time judgment carries out noise reduction process to call voice.
Referring to Fig. 9, Fig. 9 is the high-level schematic functional block diagram of intelligent terminal of the present invention the 4th embodiment.
Intelligent terminal also comprises:
Durable link is set up unit 105, and for setting up and the lasting voice link of the second terminal, the microphone of the second terminal constantly sends to first terminal by the ambient noise collecting
After sound collection unit 101 gathers call voice and ambient noise, durable link is set up the lasting voice link of unit 105 foundation and the second terminal, no longer carry out the opening and closing of voice link, the secondary microphone of the second terminal constantly sends to first terminal by the ambient noise collecting, judge that when first terminal it is under rest state, reject the ambient noise audio frequency that the second terminal sends over; Judge that when first terminal it is under unpeace state, receive the ambient noise audio frequency that the second terminal sends over, then call voice is carried out to noise reduction process.
In the present embodiment, first terminal is set up the lasting voice link with the second terminal, first terminal no longer carries out the opening and closing of voice link, has reduced the holding time of first terminal processor, has improved to a certain extent the efficiency of call voice being carried out to noise reduction process.
Referring to Figure 10, Figure 10 is the high-level schematic functional block diagram of intelligent terminal of the present invention the 5th embodiment.
Intelligent terminal also comprises:
Whether Real-Time Monitoring unit 106, be rest state for the environment of living in of first terminal described in Real-Time Monitoring, judges whether to carry out noise reduction to call voice;
If described first terminal, in unpeace state, carries out noise reduction process to call voice;
If described first terminal, in rest state, does not carry out noise reduction process to call voice.
In the present embodiment, no matter Real-Time Monitoring unit 106 determines whether rest state to the residing environment of first terminal, whether call voice is carried out to noise reduction process, in follow-up communication process, all continue whether the current environment of monitoring is rest state, and enter noise reduction process or exit noise reduction process according to the ambient conditions judgement of follow-up Real-Time Monitoring, in real time call voice is correctly processed thereby realized in communication process, call voice is carried out to noise reduction process at unpeace state, call voice is not carried out to noise reduction process in rest state, and then the speech quality of guarantee call voice in whole communication process.
Referring to Figure 11, Figure 11 is intelligent terminal specific implementation structural representation of the present invention.
The second terminal comprises microphone, processor, wireless communication apparatus and power supply, the microphone of the second terminal is as secondary microphone, first terminal comprises microphone, processor, wireless communication apparatus and power supply, the microphone of first terminal is as main microphone, and wireless communication apparatus comprises the Near Field Communication such as bluetooth, WIFI device.Taking bluetooth as embodiment, blue-teeth communication equipment comprises Bluetooth chip and antenna.First terminal and the second terminal are set up Bluetooth pairing, when first terminal detects noise circumstance, its processor is encoded built-in control command to send to Bluetooth chip, Bluetooth chip is encoded by bluetooth AT (Attention) instruction set to this command string, send to the second terminal Bluetooth communication device through Bluetooth antenna, the bluetooth AT instruction transformation that the second terminal Bluetooth communication device sends first terminal is communication standard AT instruction, and send to the second terminal handler, the second terminal handler is carried out AT instruction, set up the blue tooth voice link of standby and the second terminal of first terminal, start secondary microphone and gather audio signal, carry out sending to first terminal blue-teeth communication equipment by blue-teeth communication equipment after A/D conversion and coding.In the time that first terminal detects quiet environment, close secondary microphone to the second terminal by above-mentioned steps sending controling instruction, disconnect blue tooth voice link.
Another kind of execution mode, when call, first terminal blue-teeth communication equipment is set up voice link with the second terminal Bluetooth communication device always and is connected, the secondary microphone of the second terminal gathers ambient noise always and sends to first terminal, and first terminal detects call environment and determines whether to carry out dual microphone denoising Processing.
In addition, the microphone of first terminal can be used as secondary microphone in the time of call, for gathering call ambient noise and sending to the second terminal.The microphone of the second terminal is as main microphone, while being used for conversing, gather voice and ambient noise, the audio signal that the second terminal sends first terminal processor and the microphone of himself collect audio signal and carry out DSP denoising Processing, because this two microphone separates, distance, the voice signal amplitude difference gathering is large, after treated device DSP denoising Processing, can retain good voice signal, this execution mode can effectively solve and when existing dual microphone de-noising mobile phone causes hand-free call because dual microphone distance is limited, send loudness and be subject to mouth and mobile phone distance affects problem.
In the time that first terminal does not have radio communication function, the method for call noise reduction of the present invention and above-mentioned basic identical in principle, the method for step and above-mentioned first terminal call noise reduction is basic identical, and difference is:
In step S103, the call voice after coding output noise reduction to the second terminal, then the second terminal is sent to the equipment of communicating by letter with first terminal by the call voice after noise reduction again;
In step S104, described first terminal direct coding is exported call voice to the second terminal of its collection, and then the second terminal is sent to the equipment of communicating by letter with first terminal by the call voice after noise reduction again.
In the present embodiment, first terminal and the second terminal can be carried out as the call voice to first terminal collection and ambient noise the processing side of noise reduction process, when first terminal is during as noise reduction process side, first terminal collection voice call and ambient noise directly send to the processor of first terminal, the processor of first terminal receives the ambient noise that the second terminal gathers, then the ambient noise that first terminal sends over according to the second terminal is carried out noise reduction process to call voice, call voice after coding output noise reduction to the second terminal, then the second terminal is sent to the equipment of communicating by letter with first terminal by the call voice after noise reduction again, when the second terminal is during as noise reduction process side, first terminal collection voice call and ambient noise send to the processor of the second terminal, then the second terminal sends over according to first terminal call voice and ambient noise are carried out noise reduction process to call voice, and the second terminal is sent to the call voice after noise reduction the equipment of communicating by letter with first terminal.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.

Claims (12)

1. a method for intelligent terminal call noise reduction, is characterized in that, comprising:
In the time that voice communication starts, first terminal gathers call voice and ambient noise;
Described first terminal according to the call voice of its collection or/and ambient noise judge whether in rest state;
If described first terminal is not in rest state, the ambient noise that described first terminal sends over according to the second terminal is carried out noise reduction process to call voice;
If described first terminal, in rest state, does not do noise reduction process.
2. the method for claim 1, is characterized in that, described first terminal according to the call voice of its collection or/and ambient noise judge whether to comprise in the step of rest state:
Draw signal to noise ratio according to the call voice of described first terminal collection and ambient noise;
If described signal to noise ratio is more than or equal to preset value, described first terminal is in rest state.
3. the method for claim 1, is characterized in that, described first terminal according to the call voice of its collection or/and ambient noise judge whether to comprise in the step of rest state:
Draw the amplitude of ambient noise according to the ambient noise of described first terminal collection;
If described ambient noise range value is less than default noise signal amplitude threshold values, described first terminal is in rest state.
4. the method for claim 1, is characterized in that, if described first terminal not in rest state, the step that the ambient noise that described first terminal sends over according to described the second terminal is carried out noise reduction process comprises:
If described first terminal not in rest state, is set up the voice link with described the second terminal, the microphone that starts described the second terminal gathers ambient noise;
The ambient noise that described first terminal sends over according to described the second terminal is carried out noise reduction process to call voice.
5. the method for claim 1, is characterized in that, described first terminal does not carry out noise reduction process in rest state, or described first terminal also comprises after rest state is not carried out the step of noise reduction process:
Whether its environment of living in of described first terminal Real-Time Monitoring is rest state, judges whether to carry out noise reduction to call voice;
If described first terminal, in unpeace state, carries out noise reduction process to call voice;
If described first terminal, in rest state, does not carry out noise reduction process to call voice.
6. the method for claim 1, is characterized in that, after the main microphone of described first terminal gathers the step of call voice and ambient noise, also comprises:
Described first terminal is set up the lasting voice link with described the second terminal, and the microphone of described the second terminal constantly sends to described first terminal by the ambient noise collecting.
7. an intelligent terminal, is characterized in that, comprising:
Sound collection unit, in the time that voice communication starts, gathers call voice and ambient noise;
Rest state judging unit, for the call voice that gathers according to described main microphone or/and ambient noise judge whether in rest state;
Voice de-noising output unit, at described first terminal during not in rest state, the ambient noise sending over according to described the second terminal is carried out noise reduction process to call voice;
Voice-output unit, at described first terminal in rest state, call voice is not done to noise reduction process.
8. intelligent terminal as claimed in claim 7, is characterized in that, described rest state judging unit is used for:
Draw signal to noise ratio according to the call voice of described first terminal collection and ambient noise;
If described signal to noise ratio is more than or equal to preset value, described first terminal is in rest state.
9. intelligent terminal as claimed in claim 7, is characterized in that, described rest state judging unit is used for:
Draw the amplitude of ambient noise according to the ambient noise of described first terminal collection;
If described ambient noise range value is less than default noise signal amplitude threshold values, described first terminal is in rest state.
10. intelligent terminal as claimed in claim 7, is characterized in that, described voice de-noising output unit comprises:
Link is enabled module, at described first terminal during not in rest state, sets up and the voice link of described the second terminal, and the microphone that starts described the second terminal gathers ambient noise;
Noise reduction output module, carries out noise reduction process for the ambient noise sending over according to described the second terminal to call voice.
11. intelligent terminals as claimed in claim 7, is characterized in that, described intelligent terminal also comprises:
Whether Real-Time Monitoring unit, be rest state for the environment of living in of first terminal described in Real-Time Monitoring, judges whether to carry out noise reduction to call voice;
If described first terminal, in unpeace state, carries out noise reduction process to call voice;
If described first terminal, in rest state, does not carry out noise reduction process to call voice.
12. intelligent terminals as claimed in claim 7, is characterized in that, described intelligent terminal also comprises:
Durable link is set up unit, and for setting up and the lasting voice link of described the second terminal, the microphone of described the second terminal constantly sends to described first terminal by the ambient noise collecting.
CN201410219218.6A 2014-05-22 2014-05-22 Intelligent terminal call noise reduction method and intelligent terminal CN104092801A (en)

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