CN103489452A - Method and device for eliminating call noise and terminal device - Google Patents

Method and device for eliminating call noise and terminal device Download PDF

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Publication number
CN103489452A
CN103489452A CN201310439614.5A CN201310439614A CN103489452A CN 103489452 A CN103489452 A CN 103489452A CN 201310439614 A CN201310439614 A CN 201310439614A CN 103489452 A CN103489452 A CN 103489452A
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China
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noise signal
noise
analog
digital
digital signals
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CN201310439614.5A
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Chinese (zh)
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CN103489452B (en
Inventor
徐兵
孙伟
魏晓亮
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小米科技有限责任公司
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Publication of CN103489452A publication Critical patent/CN103489452A/en
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Abstract

The invention discloses a method and device for eliminating call noise and a terminal device. The method for eliminating the call noise comprises the steps that (1) when a hands-free call begins, analog-to-digital conversion is carried out on a detected first analog voice signal, and a first digital voice signal is obtained; (2) processing is carried out on the first digital voice signal according to a stored noise floor signal, and a second digital voice signal is obtained.

Description

A kind of call noise removing method, device and terminal device
Technical field
The disclosure relates to the audio signal processing technique field, relates in particular to a kind of call noise removing method, device and terminal device.
Background technology
In correlation technique, develop rapidly along with consumer electronics product, especially intelligent terminal product explosive growth, cell-phone function can meet everybody most of demand, but one of qualitative factor that mobile phone tonequality is user's emphasis always to be pursued, how better promoting tonequality, experience to strengthen the user, is the current anxious technical issues that need to address.
Summary of the invention
Disclosure embodiment provides a kind of call noise removing method, device and terminal device, for realizing removing when the hand-free call back noise of call voice, improves quality of speech signal and communication effect.
On the one hand, the disclosure provides a kind of call noise removing method, comprising:
After hand-free call starts, the first analog voice signal detected is carried out obtaining the first audio digital signals after analog to digital conversion;
According to the back noise signal of storage, described the first audio digital signals is processed, obtained the second audio digital signals.
Beneficial effects more of the present disclosure can comprise: by the back noise of hand-free call of record, the voice signal of current talking is carried out to the back noise elimination, improve quality and the communication effect of voice signal, strengthen the user and experience.
Described method also comprises:
Before hand-free call starts, record simulation back noise signal;
Store described simulation back noise signal, or described simulation back noise signal is carried out obtaining digital back noise signal after analog to digital conversion, store described digital back noise signal.
Beneficial effects more of the present disclosure can comprise: by the back noise of hand-free call of record, the voice signal of current talking is carried out to the back noise elimination, improve quality and the communication effect of voice signal, strengthen the user and experience.In addition, only store digital back noise signal and get final product in terminal device, when follow-up back noise Processing for removing, can directly take out use, reduce the processing delay to voice signal.
When the back noise signal of storage is simulation back noise signal, after hand-free call starts, described simulation back noise signal is carried out obtaining digital back noise signal after analog to digital conversion.
The described back noise signal according to storage is processed described the first audio digital signals, and the operation that obtains the second audio digital signals comprises:
By described the first audio digital signals and described digital back noise signal subtraction, the second audio digital signals after the back noise that is eliminated.Beneficial effects more of the present disclosure can comprise: the removing method of voice signal back noise is simple, can complete rapidly the back noise Processing for removing of voice signal and not affect normally carrying out of conversation, avoiding occurring owing to voice signal being processed to the time delay caused.
After obtaining the second audio digital signals, described method also comprises:
Described the second audio digital signals is carried out obtaining the second analog voice signal after digital-to-analog conversion.
Beneficial effects more of the present disclosure can comprise: the second analog voice signal obtained is the voice signal of removing " totally " that can hear of back noise, improves quality and the communication effect of voice signal, strengthens the user and experiences.
On the other hand, the disclosure provides a kind of call noise cancellation element, comprising:
The first analog-to-digital conversion module, after starting when hand-free call, carry out the first analog voice signal detected to obtain the first audio digital signals after analog to digital conversion;
Memory module, for storing the back noise signal;
Processing module, processed described the first audio digital signals for the back noise signal according to storage, obtains the second audio digital signals.
Described device also comprises: logging modle and the second analog-to-digital conversion module;
Described logging modle, for before hand-free call starts, record simulation back noise signal;
Described memory module, for storing described simulation back noise signal;
Described the second analog-to-digital conversion module, after starting when hand-free call, carry out described simulation back noise signal to obtain digital back noise signal after analog to digital conversion.
Described device also comprises: logging modle and the second analog-to-digital conversion module;
Described logging modle, for before hand-free call starts, record simulation back noise signal;
Described the second analog-to-digital conversion module, for carrying out described simulation back noise signal to obtain digital back noise signal after analog to digital conversion;
Described memory module, for storing described digital back noise signal.
Described processing module, for by described the first audio digital signals and described digital back noise signal subtraction, the second audio digital signals after the back noise that is eliminated.
Described device also comprises: D/A converter module, and for described the second audio digital signals is carried out obtaining the second analog voice signal after digital-to-analog conversion.
Again on the one hand, the disclosure provides a kind of terminal device, include storer, and one or more than one program, one of them or an above program are stored in storer, and are configured to carry out described one or above routine package containing for carrying out the instruction of following operation by one or above processor:
After hand-free call starts, the first analog voice signal detected is carried out obtaining the first audio digital signals after analog to digital conversion;
According to the back noise signal of storage, described the first audio digital signals is processed, obtained the second audio digital signals.
Should be understood that, it is only exemplary that above general description and details are hereinafter described, and can not limit the disclosure.
Below by drawings and Examples, technical scheme of the present disclosure is described in further detail.
The accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the disclosure, and forms the part of instructions, with embodiment mono-of the present disclosure, is used from the explanation disclosure, does not form restriction of the present disclosure.In the accompanying drawings:
The exemplary process diagram that Fig. 1 is the call noise removing method;
Another exemplary process diagram that Fig. 2 is the call noise removing method;
The exemplary process diagram again that Fig. 3 is the call noise removing method;
The exemplary block diagram that Fig. 4 is the call noise cancellation element;
Another exemplary block diagram that Fig. 5 is the call noise cancellation element;
The exemplary block diagram that Fig. 6 is terminal device.
By above-mentioned accompanying drawing, the embodiment that the disclosure is clear and definite has been shown, hereinafter more detailed description will be arranged.These accompanying drawings and text description are not in order to limit the scope of disclosure design by any mode, but by reference to specific embodiment for those skilled in the art illustrate concept of the present disclosure.
Embodiment
For making purpose of the present disclosure, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, the disclosure is described in further details.At this, exemplary embodiment of the present disclosure and explanation thereof be for explaining the disclosure, but not as to restriction of the present disclosure.
The terminal device that in the disclosure, each embodiment relates to includes but not limited to lower a kind of hand-hold electronic equipments, such as: mobile phone, panel computer, palm PC (PDA) etc.
Hand-free call be with loudspeaker put outward the conversation sound mode play phone, in the time of for inconvenient hand-held terminal device, facilitate, usually be used in the aspects such as earphone, audio amplifier, mobile phone.When hand-free call, the sound quality of conversation may be subject to the impact of many factors, and wherein topmost is exactly back noise.
Back noise claims again ground unrest, refers to the overall noise except useful signal in electroacoustics system, comprises stereo set noise and playback neighbourhood noise two parts.During such as hand-free call, " rustling " sound except voice etc.Cross strong back noise, not only can make people's agitation, also flood detail section weak in sound, the signal to noise ratio (S/N ratio) of sound and dynamic range are reduced, reproduced sound quality is damaged.
Disclosure embodiment provides a kind of call noise removing method, device and terminal device, and the back noise during by pre-recorded hand-free call, when actual hand-free call, is removed back noise to user's voice and processed, to obtain the voice signal of " totally ".
Below in conjunction with accompanying drawing, the disclosure is elaborated.
In one embodiment, the method is for terminal device.As shown in Figure 1, the call noise removing method comprises:
Step S101, after hand-free call starts, carry out the first analog voice signal detected to obtain the first audio digital signals after analog to digital conversion;
Step S102, processed the first audio digital signals according to the back noise signal of storage, obtains the second audio digital signals.
In the present embodiment, the back noise of the hand-free call by record carries out the back noise Processing for removing to the voice signal of current talking, make detail section weak in voice signal not be submerged, keep the original signal to noise ratio (S/N ratio) of sound and dynamic range, obtain the voice signal of " totally ", thereby improve quality and the communication effect of voice signal, strengthen the user and experience.
As shown in Figure 2, the method also comprised before step S101:
Step S201, before hand-free call starts, record simulation back noise signal; Can adopt the sound-recording function record simulation back noise signal of terminal device;
Step S202, store this simulation back noise signal.
Step S203, after conversation starts, the analog to digital conversion to simulation back noise signal, obtain digital back noise signal.
What in terminal device, store like this, is simulation back noise signal.According to digital back noise signal, the first audio digital signals is processed in above-mentioned steps S104, obtained the second audio digital signals.
Perhaps as shown in Figure 3, the method also comprised before above-mentioned steps S102:
Step S301, before hand-free call starts, record simulation back noise signal;
Step S302, will simulate the back noise signal and carry out obtaining digital back noise signal after analog to digital conversion;
Step S303, store this numeral back noise signal.
Carry out immediately analog to digital conversion after having recorded simulation back noise signal, like this, only store digital back noise signal and get final product in terminal device, when follow-up back noise Processing for removing, can directly take out use, reduce the processing delay to voice signal.
In addition, in the present embodiment, back noise can, for regularly self registering, as adopted at set intervals one section back noise of sound-recording function record of terminal device, when hand-free call, be chosen the back noise Processing for removing of the back noise of nearest record for conversation.Also can the user manually record back noise, as in the situation that environmental noise is larger, the user initiatively records back noise, with after conversation in carry out the back noise elimination.
The method that step S104 utilizes the back noise signal to eliminate the back noise in the first audio digital signals can have many kinds, in the present embodiment, step S104 comprises: by the first audio digital signals and digital back noise signal subtraction, the second audio digital signals after the back noise that is eliminated.
In the present embodiment, the removing method of voice signal back noise is simple, can complete rapidly the back noise Processing for removing of voice signal and not affect normally carrying out of conversation, avoids occurring owing to voice signal being processed to the time delay caused.
After the second audio digital signals that obtains " totally ", also need this second audio digital signals is converted to simulating signal.After step S106, the method also comprises, the second audio digital signals is carried out obtaining the second analog voice signal after digital-to-analog conversion.This second analog voice signal is the voice signal of removing " totally " that can hear of back noise.
In reality, in the present embodiment, said method can be realized in the digital signal processor (digital singnal processor, DSP) in terminal device.
In another embodiment, the disclosure also provides a kind of call noise cancellation element, and as shown in Figure 4, this device comprises:
The first analog-to-digital conversion module 41, after starting when hand-free call, carry out the first analog voice signal detected to obtain the first audio digital signals after analog to digital conversion;
Memory module 42, for storing the back noise signal;
Processing module 43, processed the first audio digital signals for the back noise signal according to storage, obtains the second audio digital signals.
As shown in Figure 5, this device also comprises: logging modle 44 and the second analog-to-digital conversion module 45.Logging modle 44, for before hand-free call starts, record simulation back noise signal.Memory module 42, for storing simulation back noise signal.The second analog-to-digital conversion module 45, after starting when hand-free call, carry out described simulation back noise signal to obtain digital back noise signal after analog to digital conversion.
Perhaps, in this device: logging modle 44, for before hand-free call starts, record simulation back noise signal.The second analog-to-digital conversion module 45, carry out obtaining digital back noise signal after analog to digital conversion for simulating the back noise signal.Memory module 42, for storing digital back noise signal.
In the present embodiment, processing module 43, for for by the first audio digital signals and digital back noise signal subtraction, the second audio digital signals after the back noise that is eliminated.
As shown in Figure 5, this device also comprises: D/A converter module 46 obtains the second analog voice signal for the second audio digital signals is carried out after digital-to-analog conversion.
Fig. 6 is terminal device in the embodiment of the present invention (can be requesting party's terminal or associated terminal) structural representation.Referring to Fig. 6, the method that this terminal device can provide for implementing above-described embodiment.Preferably:
Terminal device 300 can comprise communication unit 110, includes the storer 120 of one or more computer-readable recording mediums, input block 130, display unit 140, sensor 150, voicefrequency circuit 160, WiFi (wireless fidelity, Wireless Fidelity) module 170, include the parts such as the processor 180 of processing core more than one or one and power supply 190.It will be understood by those skilled in the art that the terminal device structure shown in Fig. 6 does not form the restriction to terminal device, can comprise the parts more more or less than diagram, or combine some parts, or different parts are arranged.Wherein:
Communication unit 110 can be used for receiving and sending messages or communication process in, the reception of signal and transmission, this communication unit 110 can be RF(Radio Frequency, radio frequency) circuit, router, modulator-demodular unit, etc. network communication equipment.Especially, when communication unit 110 is the RF circuit, after the downlink information of base station is received, transfer to one or above processor 180 processing; In addition, will relate to up data and send to base station.Usually, RF circuit as communication unit includes but not limited to antenna, at least one amplifier, tuner, one or more oscillator, subscriber identity module (SIM) card, transceiver, coupling mechanism, LNA(Low Noise Amplifier, low noise amplifier), diplexer etc.In addition, communication unit 110 can also be by radio communication and network and other devices communicatings.Radio communication can be used arbitrary communication standard or agreement, include but not limited to GSM (Global System of Mobile communication, global system for mobile communications), GPRS (General Packet Radio Service, general packet radio service), CDMA (Code Division Multiple Access, CDMA), WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)), LTE (Long Term Evolution, Long Term Evolution), Email, SMS (Short Messaging Service, Short Message Service) etc.Storer 120 can be used for storing software program and module, and processor 180 is stored in software program and the module of storer 120 by operation, thereby carries out various function application and data processing.Storer 120 can mainly comprise storage program district and storage data field, wherein, but the required application program (such as sound-playing function, image player function etc.) of storage program district storage operation system, at least one function etc.; The data (such as voice data, phone directory etc.) that the use according to terminal device 300 creates etc. can be stored in the storage data field.In addition, storer 120 can comprise high-speed random access memory, can also comprise nonvolatile memory, for example at least one disk memory, flush memory device or other volatile solid-state parts.Correspondingly, storer 120 can also comprise Memory Controller, so that the access of processor 180 and 130 pairs of storeies 120 of input block to be provided.
Input block 130 can be used for receiving numeral or the character information of input, and generation arranges with the user and function is controlled relevant keyboard, mouse, control lever, optics or the input of trace ball signal.Preferably, input block 130 can comprise touch-sensitive surperficial 131 and other input equipments 132.Touch-sensitive surperficial 131, also referred to as touch display screen or Trackpad, can collect the user or near touch operation (use any applicable objects such as finger, stylus or annex such as the user on touch-sensitive surperficial 131 or near the operation touch-sensitive surperficial 131) thereon, and drive corresponding coupling arrangement according to predefined formula.Optionally, touch-sensitive surperficial 131 can comprise touch detecting apparatus and two parts of touch controller.Wherein, touch detecting apparatus detects user's touch orientation, and detects the signal that touch operation is brought, and sends signal to touch controller; Touch controller receives touch information from touch detecting apparatus, and converts it to contact coordinate, then gives processor 180, and the order that energy receiving processor 180 is sent is also carried out.In addition, can adopt the polytypes such as resistance-type, condenser type, infrared ray and surface acoustic wave to realize touch-sensitive surperficial 131.Except touch-sensitive surperficial 131, input block 130 can also comprise other input equipments 132.Preferably, other input equipments 132 can include but not limited to one or more in physical keyboard, function key (controlling button, switch key etc. such as volume), trace ball, mouse, control lever etc.
Display unit 140 can be used for demonstration by the information of user's input or offers user's information and the various graphical user interface of terminal device 300, and these graphical user interface can consist of figure, text, icon, video and its combination in any.Display unit 140 can comprise display panel 141, optionally, can adopt the forms such as LCD (Liquid Crystal Display, liquid crystal display), OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) to configure display panel 141.Further, touch-sensitive surperficial 131 can cover display panel 141, when touch-sensitive surperficial 131 detect thereon or near touch operation after, send processor 180 to determine the type of touch event, with preprocessor 180, according to the type of touch event, provide corresponding vision output on display panel 141.Although in Fig. 6, touch-sensitive surperficial 131 with display panel 141 be as two independently parts realize input and input function, in certain embodiments, can by touch-sensitive surperficial 131 and display panel 141 integrated and realize the input and output function.
Terminal device 300 also can comprise at least one sensor 150, such as optical sensor, motion sensor and other sensors.Preferably, optical sensor can comprise ambient light sensor and proximity transducer, and wherein, ambient light sensor can be regulated according to the light and shade of ambient light the brightness of display panel 141, proximity transducer can, when terminal device 300 moves in one's ear, cut out display panel 141 and/or backlight.A kind of as motion sensor; Gravity accelerometer can detect on all directions the size of the acceleration that (is generally three axles); size and the direction of gravity be can detect when static, application (such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as passometer, knock) of mobile phone attitude etc. can be used for identifying; As for terminal device 300 other sensors such as configurable gyroscope, barometer, hygrometer, thermometer, infrared ray sensor also, do not repeat them here.
Voicefrequency circuit 160, loudspeaker 161, microphone 162 can provide the audio interface between user and terminal device 300.Voicefrequency circuit 160 can be transferred to loudspeaker 161 by the electric signal after the voice data conversion received, and by loudspeaker 161, is converted to voice signal output; On the other hand, microphone 162 is converted to electric signal by the voice signal of collection, be converted to voice data after being received by voicefrequency circuit 160, after again voice data output processor 180 being processed, to send to such as another terminal device, or export voice data to storer 120 in order to further process through RF circuit 110.Voicefrequency circuit 160 also may comprise earphone jack, so that communicating by letter of peripheral hardware earphone and terminal device 300 to be provided.
In order to realize radio communication, can dispose wireless communication unit 170 on this terminal device, this wireless communication unit 170 can be the WiFi module.WiFi belongs to the short range wireless transmission technology, terminal device 300 by wireless communication unit 170 can help that the user sends and receive e-mail, browsing page and access streaming video etc., it provides wireless broadband internet access for the user.Although Fig. 6 shows wireless communication unit 170, be understandable that, it does not belong to must forming of terminal device 300, fully can be as required in the scope that does not change disclosed essence and omit.
Processor 180 is control centers of terminal device 300, utilize the various piece of various interface and the whole mobile phone of connection, be stored in software program and/or the module in storer 120 by operation or execution, and call the data that are stored in storer 120, carry out various functions and the deal with data of terminal device 300, thereby mobile phone is carried out to integral monitoring.Optionally, processor 180 can comprise one or more processing cores; Preferably, processor 180 can integrated application processor and modem processor, and wherein, application processor is mainly processed operating system, user interface and application program etc., and modem processor is mainly processed radio communication.Be understandable that, above-mentioned modem processor also can not be integrated in processor 180.
Terminal device 300 also comprises that the power supply 190(powered to all parts is such as battery), preferably, power supply can be connected with processor 180 logics by power-supply management system, thereby realizes the functions such as management charging, electric discharge and power managed by power-supply management system.Power supply 190 can also comprise one or more direct current or the random component such as AC power, recharging system, power failure detection circuit, power supply changeover device or inverter, power supply status indicator.
Although not shown, terminal device 300 can also comprise camera, bluetooth module etc., does not repeat them here.
Specifically in the present embodiment, the display unit of terminal device is touch-screen display, terminal device also includes storer, and one or more than one program, one of them or an above program are stored in storer, and are configured to carry out one or above routine package containing for carrying out the instruction of following operation by one or above processor:
After hand-free call starts, the first analog voice signal detected is carried out obtaining the first audio digital signals after analog to digital conversion;
According to the back noise signal of storage, the first audio digital signals is processed, obtained the second audio digital signals.
In program, also comprise for carrying out the instruction of following operation: before hand-free call starts, record simulation back noise signal;
Storage simulation back noise signal, maybe will simulate the back noise signal and carry out obtaining digital back noise signal after analog to digital conversion, store digital back noise signal.
In program, also comprise for carrying out the instruction of following operation: when the back noise signal of storage is simulation back noise signal, after hand-free call starts, will simulates the back noise signal and carry out obtaining digital back noise signal after analog to digital conversion.
In program, also comprise for carrying out the instruction of following operation: by the first audio digital signals and digital back noise signal subtraction, the second audio digital signals after the back noise that is eliminated.
In program, also comprise for carrying out the instruction of following operation: the second audio digital signals is carried out obtaining the second analog voice signal after digital-to-analog conversion.
Some beneficial effects of disclosure embodiment can comprise: the back noise of the hand-free call by record carries out the back noise Processing for removing to the voice signal of current talking, make detail section weak in voice signal not be submerged, keep the original signal to noise ratio (S/N ratio) of sound and dynamic range, obtain the voice signal of " totally ", thereby improve quality and the communication effect of voice signal, strengthen the user and experience.
In addition, typically, the described mobile terminal of the disclosure can be various hand-held terminal devices, such as mobile phone, personal digital assistant (PDA) etc., and therefore protection domain of the present disclosure should not be defined as the mobile terminal of certain particular type.
In addition, can also be implemented as according to method of the present disclosure the computer program of being carried out by CPU.When this computer program is carried out by CPU, carry out the above-mentioned functions limited in method of the present disclosure.
In addition, said method step and system unit also can utilize controller and make controller realize that the computer readable storage devices of the computer program of above-mentioned steps or Elementary Function realizes for storage.
In addition, should be understood that, computer readable storage devices as herein described (for example, storer) can be volatile memory or nonvolatile memory, or can comprise volatile memory and nonvolatile memory.And nonrestrictive, nonvolatile memory can comprise ROM (read-only memory) (ROM), programming ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory as an example.Volatile memory can comprise random access memory (RAM), and this RAM can serve as the External Cache storer.As an example and nonrestrictive, RAM can obtain in a variety of forms, such as synchronous random access memory (DRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate SDRAM (DDR SDRAM), enhancing SDRAM (ESDRAM), synchronization link DRAM (SLDRAM) and direct RambusRAM (DRRAM).The memory device of disclosed aspect is intended to include but not limited to the storer of these and other suitable type.
Those skilled in the art will also understand is that, in conjunction with the described various illustrative logical blocks of disclosure herein, module, circuit and algorithm steps, may be implemented as electronic hardware, computer software or both combinations.For this interchangeability of hardware and software clearly is described, with regard to the function of various exemplary components, square, module, circuit and step, it has been carried out to general description.This function is implemented as software or is implemented as hardware and depends on concrete application and the design constraint that imposes on whole system.Those skilled in the art can realize described function in every way for every kind of concrete application, but this realization determines should not be interpreted as causing breaking away from the scope of the present disclosure.
In conjunction with the described various illustrative logical blocks of disclosure herein, module and circuit, can utilize the following parts that are designed to carry out function described here realize or carry out: general processor, digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete nextport hardware component NextPort or any combination of these parts.General processor can be microprocessor, but replacedly, processor can be any conventional processors, controller, microcontroller or state machine.Processor also may be implemented as the combination of computing equipment, and for example, the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessor are in conjunction with DSP core or any other this configuration.
In conjunction with the step of the described method of disclosure herein or algorithm, can directly be included in the software module of carrying out in hardware, by processor or in the two combination.Software module can reside in the storage medium of RAM storer, flash memory, ROM storer, eprom memory, eeprom memory, register, hard disk, removable dish, CD-ROM or any other form known in the art.Exemplary storage medium is coupled to processor, make processor can be from this storage medium reading information or to this storage medium writing information.In an alternative, described storage medium can be integral to the processor together.Processor and storage medium can reside in ASIC.ASIC can reside in user terminal.In an alternative, processor and storage medium can be used as discrete assembly and reside in user terminal.
In one or more exemplary design, described function can realize in hardware, software, firmware or its combination in any.If realize in software, described function can be transmitted on computer-readable medium or by computer-readable medium as one or more instructions or code storage.Computer-readable medium comprises computer-readable storage medium and communication media, and this communication media comprises and contributes to computer program is sent to from a position any medium of another position.Storage medium can be can be by any usable medium of universal or special computer access.As an example and nonrestrictive, this computer-readable medium can comprise RAM, ROM, EEPROM, CD-ROM or other optical disc memory apparatus, disk storage device or other magnetic storage apparatus, or can be for carrying or required program code that file layout is instruction or data structure and can be by any other medium of universal or special computing machine or universal or special processor access.In addition, any connection can suitably be called computer-readable medium.For example, if use coaxial cable, optical fiber cable, twisted-pair feeder, digital subscriber line (DSL) or such as the wireless technology of infrared ray, radio and microwave come from website, server or other remote source send software, above-mentioned coaxial cable, optical fiber cable, twisted-pair feeder, DSL or include the definition at medium such as the wireless technology of infrared first, radio and microwave.As used herein, disk and CD comprise compact disk (CD), laser disk, CD, digital versatile disc (DVD), floppy disk, Blu-ray disc, disk rendering data magnetically usually wherein, and cd-rom using laser optics ground rendering data.The combination of foregoing also should be included in the scope of computer-readable medium.
Although the disclosed content in front shows exemplary embodiment of the present disclosure, it should be noted that under the prerequisite of the scope of the present disclosure that does not deviate from the claim restriction, can carry out multiple change and modification.According to function, step and/or the action of the claim to a method of disclosed embodiment described herein, need not carry out with any particular order.In addition, although element of the present disclosure can be with individual formal description or requirement, also it is contemplated that a plurality of, unless clearly be restricted to odd number.
Above-described embodiment; purpose of the present disclosure, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only embodiment of the present disclosure; and be not used in and limit protection domain of the present disclosure; all within spirit of the present disclosure and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present disclosure.

Claims (11)

1. a call noise removing method, is characterized in that, comprising:
After hand-free call starts, the first analog voice signal detected is carried out obtaining the first audio digital signals after analog to digital conversion;
According to the back noise signal of storage, described the first audio digital signals is processed, obtained the second audio digital signals.
2. method according to claim 1, is characterized in that, described method also comprises:
Before hand-free call starts, record simulation back noise signal;
Store described simulation back noise signal, or described simulation back noise signal is carried out obtaining digital back noise signal after analog to digital conversion, store described digital back noise signal.
3. method according to claim 2, is characterized in that, when the back noise signal of storage is simulation back noise signal, after hand-free call starts, described simulation back noise signal carried out obtaining digital back noise signal after analog to digital conversion.
4. method according to claim 3, is characterized in that, the described back noise signal according to storage is processed described the first audio digital signals, and the operation that obtains the second audio digital signals comprises:
By described the first audio digital signals and described digital back noise signal subtraction, the second audio digital signals after the back noise that is eliminated.
5. method according to claim 1, is characterized in that, after obtaining the second audio digital signals, described method also comprises:
Described the second audio digital signals is carried out obtaining the second analog voice signal after digital-to-analog conversion.
6. a call noise cancellation element, is characterized in that, comprising:
The first analog-to-digital conversion module, after starting when hand-free call, carry out the first analog voice signal detected to obtain the first audio digital signals after analog to digital conversion;
Memory module, for storing the back noise signal;
Processing module, processed described the first audio digital signals for the back noise signal according to storage, obtains the second audio digital signals.
7. device according to claim 6, is characterized in that, described device also comprises: logging modle and the second analog-to-digital conversion module;
Described logging modle, for before hand-free call starts, record simulation back noise signal;
Described memory module, for storing described simulation back noise signal;
Described the second analog-to-digital conversion module, after starting when hand-free call, carry out described simulation back noise signal to obtain digital back noise signal after analog to digital conversion.
8. device according to claim 6, is characterized in that, described device also comprises: logging modle and the second analog-to-digital conversion module;
Described logging modle, for before hand-free call starts, record simulation back noise signal;
Described the second analog-to-digital conversion module, for carrying out described simulation back noise signal to obtain digital back noise signal after analog to digital conversion;
Described memory module, for storing described digital back noise signal.
9. according to the described device of claim 7 or 8, it is characterized in that, described processing module, for by described the first audio digital signals and described digital back noise signal subtraction, the second audio digital signals after the back noise that is eliminated.
10. device according to claim 5, is characterized in that, described device also comprises: D/A converter module, and for described the second audio digital signals is carried out obtaining the second analog voice signal after digital-to-analog conversion.
A 11. terminal device, it is characterized in that, terminal device includes storer, and one or more than one program, one of them or an above program are stored in storer, and are configured to carry out described one or above routine package containing for carrying out the instruction of following operation by one or above processor:
After hand-free call starts, the first analog voice signal detected is carried out obtaining the first audio digital signals after analog to digital conversion;
According to the back noise signal of storage, described the first audio digital signals is processed, obtained the second audio digital signals.
CN201310439614.5A 2013-09-24 2013-09-24 Method and device for eliminating call noise and terminal device CN103489452B (en)

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