CN103442118A - Bluetooth car hands-free phone system - Google Patents
Bluetooth car hands-free phone system Download PDFInfo
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- CN103442118A CN103442118A CN2013103384935A CN201310338493A CN103442118A CN 103442118 A CN103442118 A CN 103442118A CN 2013103384935 A CN2013103384935 A CN 2013103384935A CN 201310338493 A CN201310338493 A CN 201310338493A CN 103442118 A CN103442118 A CN 103442118A
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Abstract
The invention discloses a bluetooth car hands-free phone system which comprises a bluetooth hands-free controller, a bluetooth mobile phone, a control panel, a microphone, a power source, a power management module, a car audio system and a loudspeaker. The bluetooth car hands-free phone system is characterized in that the bluetooth hands-free controller comprises an ARM microprocessor, a bluetooth module, a printed-circuit board antenna, a speech synthesis module and an echo cancellation and noise suppression module; the control panel can be mounted on a steering wheel; the car audio system is connected with the loudspeaker, and the car audio system, the microphone, the control panel, the power source and the power management module are all connected with the bluetooth hands-free controller; the bluetooth mobile phone is connected with the bluetooth module, and the bluetooth module, the printed-circuit board antenna, the speech synthesis module and the echo cancellation and noise suppression module are all connected with the ARM microprocessor. The bluetooth car hands-free phone system is reasonable in design, the echo cancellation and noise suppression module in the system can well conduct echo cancellation and noise attenuation treatment on speech signals, and call quality is guaranteed.
Description
Technical field
The invention belongs to Bluetooth communication and voice technology field, particularly Bluetooth technology is applied to a kind of implementation of Bluetooth hands-free system of onboard system.
Background technology
In recent years, along with social development, automobile is more and more bought by people and is used, and it has become one of essential traffic instrument indispensable in city and rural area.In social life now, automobile is not only people's walking-replacing tool, has also become the sign of city fashion.Meanwhile, along with the development of mobile communication technology, the mobile terminals such as mobile phone have also become requisite tool of communications in people's daily life, worldwide by extensively general use.Yet, in a lot of situations, need us in the process of driving, to use mobile phone communication.If in driving procedure, use mobile phone to answer or call, all likely cause traffic accident, be a very important potential safety hazard.At present for fear of under steam due to the traffic accident of dialing or receiving calls and causing, people have adopted several different methods, as modulated by signal, frequency modulation amplification etc., but these methods all can not address this problem well, the appearance of blue tooth vehicular technology, provide one better to select for addressing this problem.Along with the reduction of Bluetooth chip cost and size, Bluetooth technology is applied in more areas more and more widely.
Bluetooth is a kind of of wireless communication technology, and along with the development of wireless communication technology, people have adapted to impact and the infiltration of wireless communication technology on onboard system.But current vehicle-mounted Bluetooth equipment is all generally to rely on display screen to carry out finishing man-machine interaction, in the process of use, the driver must check that display screen determines incoming person's information, will cause like this driver to divert one's attention, thereby cause the generation of traffic accident.Therefore, from driver's security consideration, perfect on-vehicle hand-free system should avoid utilizing display screen to use the speech play replacement instead, to reduce the incidence of traffic accident.
Nowadays automotive electronics is surging forward, and the hands-free technology of current blue tooth vehicular is exactly under steam owing to dialing or the answering cell phone phone causes a kind of wireless connect technology easily that traffic accident proposes for fear of the driver.Implementation of Bluetooth hands-free system has the automatic speech recognition function, in the situation that do not need to contact mobile phone, controls mobile phone by phonetic order and dials or receive calls.He can carry out voice transfer by the sound equipment on car or Bluetooth wireless earphone.But the ability abated the noise of current implementation of Bluetooth hands-free system is very weak, often have very large noise during conversation, affect speech quality.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of implementation of Bluetooth hands-free system with echo cancellation and noise suppression module is provided, this system allows driver individual mobile phone to be placed on the seat on side, by being arranged on microphone in car and the loud speaker of car audio system, with other people, converses.This allows the motorist need not touch phone and just can answer or dial, and vacates both hands and attentively drives, thereby improved the fail safe of driving.When having phone to come in, the car stereo sound equipment just can become quiet automatically, and the driver can hear by the stero set loud speaker of automobile caller's sound.The automobile receiver of available prepackage during conversation, and answer or refuse incoming call with phonetic order.Echo cancellation in system and noise suppression module can be eliminated the noise in communication process well.Small-sized control panel can be placed on the steering wheel of automobile and be used for starting phone, controls volume and answer or refuse incoming call.
The present invention solves its technical problem and takes following technical scheme to realize:
A kind of implementation of Bluetooth hands-free system, comprise bluetooth handsfree controller, bluetooth cellular phone, control panel, microphone, power supply and power management module, vehicle audio and loud speaker, it is characterized in that: described bluetooth handsfree controller comprises ARM microprocessor, bluetooth module, printed circuit board antenna, voice synthetic module and echo cancellation and noise suppression module, and control panel can be arranged on steering wheel; Wherein, described vehicle audio connects loud speaker, described vehicle audio, microphone, control panel and power supply and power management module all are connected with the bluetooth handsfree controller, described bluetooth cellular phone is connected with bluetooth module, and described bluetooth module, printed circuit board antenna, voice synthetic module and echo cancellation and noise suppression module all are connected with the ARM microprocessor.
And described implementation of Bluetooth hands-free system also comprises bluetooth earphone, and bluetooth earphone is connected with bluetooth module.
And described bluetooth module adopts the blue tooth vehicular hands-free module.
And described ARM microprocessor adopts MCU chip LPC2102.
And described echo cancellation and noise suppression module adopt the ATH3101 cake core.
And described control panel has the button of answering, hangs up button, volume increases button and volume-down keys.
Advantage of the present invention and good effect are:
1, the invention solves current on-vehicle hands-free device due to built-in gsm module, the problem that cost is higher, can enter the GSM net by bluetooth cellular phone mainly due to implementation of Bluetooth hands-free system, therefore need not additionally add gsm module, greatly provides cost savings.
2, the present invention is reasonable in design, and the process test macro is reliable and stable, real-time is improved, easy to operate, cost is low.Be furnished with the Bluetooth operation switch on steering wheel, simple to the definition of button, and the operation such as facilitate the driver to carry out when driving to receive calls, and greatly improved fail safe, reduced traffic accident.Echo cancellation in system and noise suppression module can well voice signal be eliminated to echo and noise reducing is processed, and guarantees speech quality.
The accompanying drawing explanation
Fig. 1 is the theory structure block diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described:
A kind of implementation of Bluetooth hands-free system, comprise bluetooth handsfree controller, bluetooth cellular phone, control panel, microphone, power supply and power management module, vehicle audio and loud speaker, it is characterized in that: described bluetooth handsfree controller comprises ARM microprocessor, bluetooth module, printed circuit board antenna, voice synthetic module and echo cancellation and noise suppression module, and control panel can be arranged on steering wheel; Wherein, described vehicle audio connects loud speaker, described vehicle audio, microphone, control panel and power supply and power management module all are connected with the bluetooth handsfree controller, described bluetooth cellular phone is connected with bluetooth module, and described bluetooth module, printed circuit board antenna, voice synthetic module and echo cancellation and noise suppression module all are connected with the ARM microprocessor.And described implementation of Bluetooth hands-free system also comprises bluetooth earphone, and bluetooth earphone is connected with bluetooth module.Described bluetooth module adopts the blue tooth vehicular hands-free module; Described ARM microprocessor adopts MCU chip LPC2102; Described echo cancellation and noise suppression module adopt the ATH3101 cake core; Described control panel has the button of answering, hangs up button, volume increases button and volume-down keys.
In conjunction with Fig. 1, set forth operation principle of the present invention:
Bluetooth module adopts the blue tooth vehicular hands-free module, support all mobile phones that meet Bluetooth specification, for different bluetooth cellular phones, bluetooth module, can automatically switch, by serial ports, with the ARM microprocessor, be connected, mainly completing of task is and communication between mobile phone with Bluetooth function, and voice signal eliminated to echo and noise reducing is processed.Power unit, the 24V power supply of inputting by high efficiency power supply chip converts the various voltages that are applicable to the bluetooth handsfree system to.Voice synthetic module is connected with the ARM microprocessor by serial ports, is responsible for the text obtained from the ARM microprocessor is carried out to the conversion of signal.The MCU chip LPC2102 that the ARM microprocessor adopts and bluetooth module and voice synthetic module carry out respectively the control of asynchronous serial communication, coordinate communication and control between the whole system each several part.
System of the present invention has initialization bluetooth module function: bluetooth module mainly be responsible for to send matching instruction and mobile phone is mated, the initialization bluetooth module is answered sound, answering mode are set to hands-free.The keystroke handling function: two tasks of key scan and keystroke handling that are provided with are called by system, the key scan task is exactly for which kind of identifying by method, this button that then will identify be converted into a key value by method, finally by this key value, the form by the press key message queue sends the keystroke handling task to, is mainly finally to make corresponding processing for the identification of regulating system volume sound and numerical key and function key.Incoming call reminding function: incoming call reminding function mainly produces and interrupts carrying out numbers match and name information or telephone number being sent to voice module with the mail form when calling.
Voice synthetic module is mainly accept from the mailbox message of incoming call reminding function and send coded message by serial ports to voice synthetic module by calling OSMboxPend, make voice synthetic module read name information, send to the ARM microprocessor on-hook signal amount that connects afterwards.When pressing connection or hang-up key, will produce interruption.Call OSSemPost and wake the on-hook task that connects up in interruption, eliminate interrupt identification simultaneously.Connect the on-hook task by OSSemPend picked up signal amount.Send and answer order to bluetooth module by answering button, by hanging up button, to bluetooth module, send ath command to process accordingly.
The MCU chip LPC2102 that the ARM microprocessor adopts, as main control chip, is used dual serial interface and voice synthetic module XF-S3231B and bluetooth module BT-CKM3 to carry out transfer of data, and accepts the request from them.Use general purpose I/O interface to control variable connector, complete electrical source exchange and voice switching, acceptance comes from the control command that the control panel button that is arranged on steering wheel sends, signal by voice signal after vehicle-mounted dedicated frequency amplifier is passed to vehicle audio, with this, realizes bluetooth hand-free function.Adopt ATH3101 type echo cancellation and noise suppressed chip to realize high-quality exchange of speech.
Bluetooth technology is the radiotechnics of a kind of support equipment short haul connection (being generally within 10 meters), mobile phone can comprised, PDA, wireless headset, notebook computer, carry out the wireless messages exchange between numerous equipment such as relevant peripheral hardware, it is adopted by a large amount of cell phone manufacturers, for the short-range communication that solves better Handless system provides best air interface and good communication quality, system selection BT-CKM3 bluetooth module of the present invention completes with foundation and the number of mobile phone airlink and passes, Bluetooth technology has been a kind of very ripe short range transmission means, highly integrated module has not only shortened the construction cycle, also reduced holistic cost simultaneously.The automatic foundation that the BT-CKM3 bluetooth module can be realized Bluetooth protocol within 10 meters distances with communicate by letter, and can data message and ARM microprocessor be carried out alternately by serial ports, but he does not have the voice output interface, but pcm interface, so must under other PCM codec chips auxiliary, just can work.The echo cancellation of ATH3101 type and noise suppressed chip have pcm interface just, can carry out full-duplex communication with bluetooth module.
The volume of loud speaker still can have good echo processing function when 120dB, owing to using the original car audio system of automobile, the position of loud speaker just is relatively fixed, increase the distance between microphone and loud speaker, show that the microphone installation site has the larger degree of freedom, such as it being arranged on sunshading board or panel board, also for installing, provide convenience.
Speech synthesis technique is called for short the TTS technology, and this technology solves how Word message is converted into to the problem of acoustic information, thereby become to be seen as, listens, and makes the mode of people's obtaining information more enrich nature.Can be with the chip voice signal pre-deposited of regenerating, just as common recorder, but difference just adopts digital storage technique, also pre-deposit enough voice units, picking out required voice unit when synthetic is stitched together, generate the statement of high naturalness, the phoneme synthesizing method of Here it is waveform concatenation.In order to save memory capacity, before depositing system in to the advanced data compression of voice signal, adopt the method for Digital Signal Processing, the source of mankind's generating process being regarded as to a simulation glottis state, time varying digital filter that characterizes the vocal tract resonance characteristic of de-energisation, this source may be periodic pulse train, and the parameter equivalent of represent noiseless voiceless sound, adjusting filter, in changing oral cavity and vocal tract shape, reaches and controls the purpose of sending out alternative sounds.The XF-S3231 voice synthetic module can be realized the conversion from the text to sound, the text-processing front end integrated the text analyzing algorithm, the processing methods such as rule and statistics are carried out to combination, possessed predictive ability, can automatically identify and process the ability of the texts such as time on date, the numerical value amount of money, telephone number, can utilize special control sign the synthetic effect of module to be carried out to the adjustment on the intonation of word speed, and utilize and control sign surname is identified accurately.
What need report in system is the information such as name, time, telephone number and incoming call prompting, the corresponding function of voice synthetic module XF-S3231 can complete these operations, and there is the audio prompt tone inside, for the tinkle of bells and information reminding, reduce volume of transmitted data, increased response speed.
It is emphasized that; embodiment of the present invention is illustrative; rather than determinate; therefore the present invention is not limited to the embodiment described in embodiment; every other execution modes that drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (6)
1. an implementation of Bluetooth hands-free system, comprise bluetooth handsfree controller, bluetooth cellular phone, control panel, microphone, power supply and power management module, vehicle audio and loud speaker, it is characterized in that: described bluetooth handsfree controller comprises ARM microprocessor, bluetooth module, printed circuit board antenna, voice synthetic module and echo cancellation and noise suppression module, and control panel can be arranged on steering wheel; Wherein, described vehicle audio connects loud speaker, described vehicle audio, microphone, control panel and power supply and power management module all are connected with the bluetooth handsfree controller, described bluetooth cellular phone is connected with bluetooth module, and described bluetooth module, printed circuit board antenna, voice synthetic module and echo cancellation and noise suppression module all are connected with the ARM microprocessor.
2. implementation of Bluetooth hands-free system according to claim 1, it is characterized in that: described implementation of Bluetooth hands-free system also comprises bluetooth earphone, and bluetooth earphone is connected with bluetooth module.
3. implementation of Bluetooth hands-free system according to claim 1, is characterized in that: described bluetooth module employing blue tooth vehicular hands-free module.
4. implementation of Bluetooth hands-free system according to claim 1, is characterized in that: described ARM microprocessor employing MCU chip LPC2102.
5. implementation of Bluetooth hands-free system according to claim 1, is characterized in that: described echo cancellation and noise suppression module employing ATH3101 cake core.
6. implementation of Bluetooth hands-free system according to claim 1 is characterized in that: described control panel has the button of answering, hangs up button, volume increases button and volume-down keys.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103384935A CN103442118A (en) | 2013-08-06 | 2013-08-06 | Bluetooth car hands-free phone system |
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| CN2013103384935A CN103442118A (en) | 2013-08-06 | 2013-08-06 | Bluetooth car hands-free phone system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103942852A (en) * | 2014-04-04 | 2014-07-23 | 广东翼卡车联网服务有限公司 | Travelling recording method and system based on mobile phone terminal |
| CN104734752A (en) * | 2015-03-27 | 2015-06-24 | 深圳市奋达科技股份有限公司 | Bluetooth conference facility |
| CN106114212A (en) * | 2016-08-16 | 2016-11-16 | 宁夏创耀信科技有限公司 | Drunk driving induction control system |
| CN110581722A (en) * | 2019-09-08 | 2019-12-17 | 一汽轿车股份有限公司 | vehicle-mounted Bluetooth hands-free system |
-
2013
- 2013-08-06 CN CN2013103384935A patent/CN103442118A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103942852A (en) * | 2014-04-04 | 2014-07-23 | 广东翼卡车联网服务有限公司 | Travelling recording method and system based on mobile phone terminal |
| CN104734752A (en) * | 2015-03-27 | 2015-06-24 | 深圳市奋达科技股份有限公司 | Bluetooth conference facility |
| CN106114212A (en) * | 2016-08-16 | 2016-11-16 | 宁夏创耀信科技有限公司 | Drunk driving induction control system |
| CN110581722A (en) * | 2019-09-08 | 2019-12-17 | 一汽轿车股份有限公司 | vehicle-mounted Bluetooth hands-free system |
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Application publication date: 20131211 |
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| WD01 | Invention patent application deemed withdrawn after publication |