CN1728740A - Blue teeth automative picking up free device combined with automotive video/audio system - Google Patents
Blue teeth automative picking up free device combined with automotive video/audio system Download PDFInfo
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- CN1728740A CN1728740A CN 200510027037 CN200510027037A CN1728740A CN 1728740 A CN1728740 A CN 1728740A CN 200510027037 CN200510027037 CN 200510027037 CN 200510027037 A CN200510027037 A CN 200510027037A CN 1728740 A CN1728740 A CN 1728740A
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Abstract
UART port of blue teeth module is connected to input end of microprocessor of car video/audio system. Output end of the microprocessor is connected to LCD driver, keyboard, audio system of car video/audio system, and input end of servo system of the car video/audio system. Output end of LCD drive is connected to the input end of LCD display screen. PCM port of blue teeth module is connected to the input end of anti echo circuit. Through blue teeth technique, connection of blue teeth is built between blue teeth handset and blue teeth module built in car video/audio system. Voice and control command are transmitted between blue teeth handset and blue teeth module in digital form so as to realize functions such as display of incoming call, remote dialing, state conversion and state display. Using DPS, the invention eliminates echo, restrains environmental noise, realizing best quality of communication.
Description
[technical field]
The invention belongs to wireless communication technology field, a kind of specifically bluetooth automobile hands-free device that combines with the automobile audio-video system.
[technical background]
For improving the fail safe of automobile, many in the world countries promulgate a decree and forbid that the person for driving a car uses mobile phone, have just lost means of communication when driving for this reason.For both get both, the automobile hands-free phone has appearred.But the hands-free device that adopts Bluetooth technology in the automobile in the past often will increase the hardware equipped in the car, need line to wear job steps such as earphone during conversation, and because the automobile hands-free device is an open system, in automotive environment, exist noise, echo and feedback, can produce a lot of noises, speech quality is difficult to guarantee, therefore also has weak point aspect the convenience of performance, fail safe and use.
[summary of the invention]
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of adopt Bluetooth wireless transmission technology, DSP disappear the echo technology and with the mobile phone hands-free device that cooperates of automobile audio-video system.
For achieving the above object, design a kind of bluetooth automobile hands-free device that combines with the automobile audio-video system, comprise the bluetooth module, automobile audio-video system microprocessor MCU, keyboard, lcd driver, LCD display, anti-echo circuit DSP, automobile audio-video system audio system, automobile audio-video system servo system, it is characterized in that: the UART-TX port of bluetooth module, the UART-RX port is connected the TX port of automobile audio-video system microprocessor MCU with the MUTE-OUT port, RX port and BTMUTE port, the DO port of automobile audio-video system microprocessor MCU, the CLK port is connected the DATA port of lcd driver with the CE port, CLK port and CE port, the KIN1 port of automobile audio-video system microprocessor MCU, the KINO port connects the input of keyboard, the output of lcd driver connects the input of LCD display, the I2CSDA port of automobile audio-video system microprocessor MCU, the I2CSCL port connects automobile audio-video system audio system DATA port, the CLK port, the output of automobile audio-video system audio system connects the automobile audio amplifier, the I/O end of automobile audio-video system servo system connects the I/O end of automobile audio-video system microprocessor MCU, the PCM-CLK port of bluetooth module, the PCM-TX port, the PCM-SYNC port, the PCM-RX port connects the BCLK port of anti-echo circuit DSP, the TX port, the LRCK-FRAME port, the RX port, the output of microphone connects the MICIN port of anti-echo circuit DSP, and the SPK-OUT port of anti-echo circuit DSP connects the SPK-OUT port of automobile audio-video system audio system; Automobile audio-video system audio system is connected DATA port, the CLK port of the electronic sound volume system of automobile audio-video system audio system inside by electronic sound volume system and 12CSDA port, the 12CSCL port of power amplifier formed automobile audio-video system microprocessor MCU, the FLOUT port of electronic sound volume system, FROUT port, RLOUT port and RROUT port are connected the input of power amplifier, and the output of power amplifier connects the automobile audio amplifier; Keyboard adopts dialing keyboard or keyboard with touch screen.
The present invention compared with prior art, bluetooth module during the employing Bluetooth technology makes bluetooth cellular phone and is built in the automobile audio-video system is set up bluetooth and is connected, form between with number transmits language and control command, the bluetooth module is set up both-way communication by the AT order with automobile audio-video system MCU, on the hardware of automobile, realize caller identification, remote dial-up, functions such as state exchange and state demonstration, in addition, the present invention also adopts DPS to eliminate echo, suppress environmental noise, realize best speech quality.
[description of drawings]
Fig. 1 is structure connection side's block diagram of the present invention;
Fig. 2 is the circuit theory diagrams of bluetooth module of the present invention, anti-echo circuit DSP, microphone, lcd driver, LCD display, keyboard;
Fig. 3 is the circuit theory diagrams of automobile audio-video system microprocessor MCU of the present invention;
Fig. 4 is the circuit theory diagrams of electronic sound volume of the present invention system;
Fig. 5 is the circuit theory diagrams of power amplifier of the present invention;
Referring to Fig. 1,1 is bluetooth cellular phone; 2 is the bluetooth module; 3 is anti-echo circuit DSP; 4 is automobile audio-video system microprocessor MCU; 5 is automobile audio-video system audio system; 6 is automobile audio-video system servo system; 7 is lcd driver; 8 is LCD display; 9 is keyboard; 10 is microphone; 11 is the automobile audio amplifier.
[embodiment]
The invention will be further described below in conjunction with accompanying drawing:
The UART-TX port of bluetooth module, the UART-RX port is connected the TX port of automobile audio-video system microprocessor MCU with the MUTE-OUT port, RX port and BTMUTE port, the DO port of automobile audio-video system microprocessor MCU, the CLK port is connected the DATA port of lcd driver with the CE port, CLK port and CE port, the KIN1 port of automobile audio-video system microprocessor MCU, the KIN0 port connects the input of keyboard, the output of lcd driver connects the input of LCD display, the I2CSDA port of automobile audio-video system microprocessor MCU, the I2CSCL port connects the DATA port of the electronic sound volume system of automobile audio-video system audio system inside, the CLK port, the FLOUT port of electronic sound volume system, the FROUT port, the RLOUT port is connected the input of power amplifier with the RROUT port, the output of power amplifier connects the automobile audio amplifier, the output of automobile audio-video system servo system connects the input of automobile audio-video system microprocessor MCU, the PCM-CLK port of bluetooth module, the PCM-TX port, the PCM-SYNC port, the PCM-RX port connects the BCLK port of anti-echo circuit DSP, the TX port, the LRCK-FRAME port, the RX port, the output of microphone connects the MICIN port of anti-echo circuit DSP, and the SPK-OUT port of anti-echo circuit DSP connects the SPK-OUT port of automobile audio-video system audio system.
Operation principle of the present invention is: the bluetooth module is built in the automobile audio-video system, and the bluetooth module will be realized wireless telecommunications by radio wave with bluetooth cellular phone.For this reason, both set up RFCOMM and connect and to be connected with SCO.After setting up the RFCOMM connection, can transmit data and control command (as PICKUP, HANGUP, RING etc.) by between; Setting up the SCO connection is to transmit digitized voice signal in real time between.
Automobile audio-video system microprocessor MCU specifically is treated to: bluetooth module transmits the AT order by the MCU of UART interface and automobile audio-video system, sets up both-way communication.And have the dialing of startup with the keyboard of the automobile audio-video system microprocessor MCU interface that is built-in with bluetooth module or keyboard with touch screen, and redial, quiet, phonetic dialing comes electrotransfer, off-hook, on-hook, volume is regulated, functions such as switch bluetooth module and pairing.On behalf of the AT order of aforesaid operations, MCU will send the bluetooth module to, and the latter finishes the user by the wireless connection control mobile phone again and wishes the operation carried out.Otherwise, the bluetooth module is bell in the future, caller ID, current state such as RFCOMM and SCO connection status, off-hook, take-up etc., and the ack signal during the MCU start-up operation sends MCU to the AT order, and MCU judges the success or failure of start-up operations according to these instructions then, understands the current state of bluetooth module, MCU sends to lcd driver with data, shows current state and caller ID with data transaction and on LCD display by lcd driver.The voice-grade channel of audio-video system is opened and is changed in control, suspends or recovers original broadcast state (CD, DVD; TV or broadcast receiver); MCU Control of Automobile audio-video system servo system is finished the operations of DVD or CD CD simultaneously, as reads dish, time-out, operations such as F.F..
Automobile audio-video system audio system is handled: be provided with a high speed voice signal processor DSP in the bluetooth handsfree device, be used for eliminating echo and suppress ambient noise.This Echo Canceller is connected with the bluetooth module by pcm interface, and both transmit audio digital signals mutually on this pcm interface.This Echo Canceller directly links to each other with microphone, the telecommunication signal of input simulation.The voice-grade channel of automobile audio-video system will be exported to after the accepted call signal process D/A conversion.Calling is treated emits in the automobile sound box system with the amplification back, guarantees speech quality.The technology of the present invention is still more clearly concerning the people of this professional domain.
Claims (3)
1, a kind of bluetooth automobile hands-free device that combines with the automobile audio-video system, comprise the bluetooth module, automobile audio-video system microprocessor MCU, keyboard, lcd driver, LCD display, anti-echo circuit DSP, automobile audio-video system audio system, automobile audio-video system servo system, it is characterized in that: the UART-TX port of bluetooth module, the UART-RX port is connected the TX port of automobile audio-video system microprocessor MCU with the MUTE-OUT port, RX port and BTMUTE port, the DO port of automobile audio-video system microprocessor MCU, CLK port and CE port are connected the DATA port of lcd driver respectively, CLK port and CE port, the KIN1 port of automobile audio-video system microprocessor MCU, the KIN0 port connects the input of keyboard, the output of lcd driver connects the input of LCD display, the I2CSDA port of automobile audio-video system microprocessor MCU, the I2CSCL port is connected to the DATA port of automobile audio-video system audio system, the CLK port, the output of automobile audio-video system audio system connects automobile audio, the output of automobile audio-video system servo system connects the input of automobile audio-video system microprocessor MCU, the PCM-CLK port of bluetooth module, the PCM-TX port, the PCM-SYNC port, the PCM-RX port connects the BCLK port of anti-echo circuit DSP, the TX port, the LRCK-FRAME port, the RX port, the output of microphone connects the MICIN port of anti-echo circuit DSP, and the SPK-OUT port of anti-echo circuit DSP connects the SPK-OUT port of automobile audio-video system audio system.
2, a kind of bluetooth automobile hands-free device that combines with the automobile audio-video system as claimed in claim 1, it is characterized in that automobile audio-video system audio system is connected DATA port, the CLK port of the electronic sound volume system of automobile audio-video system audio system inside by electronic sound volume system and 12CSDA port, the 12CSCL port of power amplifier formed automobile audio-video system microprocessor MCU, the FLOUT port of electronic sound volume system, FROUT port, RLOUT port and RROUT port are connected the input of power amplifier, and the output of power amplifier connects the automobile audio amplifier.
3, a kind of bluetooth automobile hands-free device that combines with the automobile audio-video system as claimed in claim 1 is characterized in that keyboard adopts dialing keyboard or keyboard with touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510027037 CN1728740B (en) | 2005-06-22 | 2005-06-22 | Blue teeth automative picking up free device combined with automotive video/audio system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510027037 CN1728740B (en) | 2005-06-22 | 2005-06-22 | Blue teeth automative picking up free device combined with automotive video/audio system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1728740A true CN1728740A (en) | 2006-02-01 |
| CN1728740B CN1728740B (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510027037 Expired - Fee Related CN1728740B (en) | 2005-06-22 | 2005-06-22 | Blue teeth automative picking up free device combined with automotive video/audio system |
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| Country | Link |
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| CN (1) | CN1728740B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132456B (en) * | 2006-08-22 | 2011-08-10 | 中兴通讯股份有限公司 | Blue tooth multifunctional remote controller device and method for implementing voice communication |
| CN103701507A (en) * | 2013-12-17 | 2014-04-02 | 中山菲柯特电子电器有限公司 | Bluetooth vehicle-mounted hand-free device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030050151A (en) * | 2001-12-18 | 2003-06-25 | 현대자동차주식회사 | Hands-free system for vehicles |
| JP2003312391A (en) * | 2002-04-17 | 2003-11-06 | Fujitsu Ten Ltd | Automatic adjustment device of onboard instrument |
| CN1233196C (en) * | 2003-06-05 | 2005-12-21 | 怡利电子工业股份有限公司 | Hand-free earphone for mobile phone and external blue-tooth module |
-
2005
- 2005-06-22 CN CN 200510027037 patent/CN1728740B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132456B (en) * | 2006-08-22 | 2011-08-10 | 中兴通讯股份有限公司 | Blue tooth multifunctional remote controller device and method for implementing voice communication |
| CN103701507A (en) * | 2013-12-17 | 2014-04-02 | 中山菲柯特电子电器有限公司 | Bluetooth vehicle-mounted hand-free device |
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| Publication number | Publication date |
|---|---|
| CN1728740B (en) | 2010-06-30 |
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Granted publication date: 20100630 Termination date: 20130622 |