CN103024621B - A kind of bluetooth earphone and the method utilizing bluetooth earphone to communicate - Google Patents

A kind of bluetooth earphone and the method utilizing bluetooth earphone to communicate Download PDF

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Publication number
CN103024621B
CN103024621B CN201210466239.9A CN201210466239A CN103024621B CN 103024621 B CN103024621 B CN 103024621B CN 201210466239 A CN201210466239 A CN 201210466239A CN 103024621 B CN103024621 B CN 103024621B
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bluetooth
chip
interface
audio processing
processing chip
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CN103024621A (en
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郑勇
夏晓剑
孙一镔
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Qingdao Goertek Co Ltd
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Qingdao Goertek Co Ltd
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Abstract

The invention discloses a kind of bluetooth earphone and the method utilizing bluetooth earphone to communicate.Bluetooth chip, audio processing chip, microphone and loud speaker is provided with in the bluetooth earphone that the embodiment of the present invention provides.Bluetooth chip is provided with MCU, PIO interface, I2C interface, microphone interface and speaker interface, is provided with D/A conversion module, AD conversion module, audio gain adjustment unit and I2C interface in audio processing chip, PIO interface is connected with control switch; The I2C interface of Bluetooth chip is connected with the I2C interface on audio processing chip; The microphone interface of Bluetooth chip is connected with microphone, and the speaker interface of Bluetooth chip is connected with loud speaker by audio processing chip; When control switch is in primary importance, by I2C interface, MCU forbids that audio processing chip runs, and when control switch is in the second place, MCU starts audio processing chip by I2C interface and runs.

Description

A kind of bluetooth earphone and the method utilizing bluetooth earphone to communicate
Technical field
The present invention relates to acoustic product technical field, particularly a kind of bluetooth earphone and the method utilizing bluetooth earphone to communicate.
Background technology
Bluetooth technology is applied in hands-free headsets by bluetooth earphone, allows user can exempt impeding of irritating electric wire, easily converses in every way comfortablely.Further, when using bluetooth earphone dial and receive calls, due to the antenna away from mobile phone, the impact of Electromagnetic Wave Radiation on Human is significantly reduced, so obtained the favor of all types of user since bluetooth earphone comes out.
But, existing bluetooth earphone only has wireless communication ability, function ratio is more single, the demand to some specific occasions can not be met, such as, to the user with dysaudia, or in the scene that environment is too noisy, the sound sent due to bluetooth earphone is less, causes user cannot clear uppick sound, cannot normally converse.
Summary of the invention
The invention provides a kind of bluetooth earphone and the method utilizing bluetooth earphone to communicate, to solve the problem that existing bluetooth earphone function is too single, the scope of application is narrower.
For achieving the above object, the embodiment of the present invention have employed following technical scheme:
One embodiment of the invention provides a kind of bluetooth earphone, the audio processing chip, microphone and the loud speaker that be provided with Bluetooth chip in this bluetooth earphone, are connected with this Bluetooth chip,
Bluetooth chip is provided with Micro-processor MCV, and input and output PIO interface able to programme, I2C interface, microphone interface and the speaker interface to be connected with this MCU, be provided with D/A conversion module, AD conversion module, audio gain adjustment unit and I2C interface in audio processing chip;
The PIO interface of Bluetooth chip is connected with control switch;
The I2C interface of Bluetooth chip is connected with the I2C interface on audio processing chip;
The microphone interface of Bluetooth chip is connected with microphone, and the speaker interface of Bluetooth chip is connected with loud speaker by audio processing chip;
When control switch is in primary importance, by I2C interface, MCU forbids that audio processing chip runs;
When control switch is in the second place, MCU starts audio processing chip by I2C interface and runs.
Wherein, the speaker interface of Bluetooth chip is connected to the AD conversion module of audio processing chip, and AD conversion module is connected to D/A conversion module, and D/A conversion module is connected with microphone.
Wherein, in audio gain adjustment unit, be provided with automatic gain controller AGC and digital signal processor DSP,
The output of the AD conversion module of audio processing chip is connected with the input of AGC, and the output of AGC is connected with the input of DSP, and the output of DSP is connected to D/A conversion module.
Wherein, AGC is connected with by-pass cock, the yield value change that when by-pass cock rotates, this AGC provides.
Wherein, Bluetooth chip is provided with rectifier, the first end of microphone is connected with rectifier, and the second end of microphone is connected with the microphone interface of Bluetooth chip, the 3rd end ground connection of microphone.
Wherein, the power line of Bluetooth chip is connected with the power line of audio processing chip.
The present invention another embodiment still provides a kind of method utilizing bluetooth earphone to communicate.The method comprises: in bluetooth earphone, arrange the audio processing chip be connected with Bluetooth chip, audio processing chip has audio gain adjustment unit,
When receiving bluetooth mode enabled instruction, audio processing chip runs to utilize Bluetooth chip to forbid, under making bluetooth earphone be operated in bluetooth mode;
When receiving the enabled instruction of the bluetooth mode with audio gain adjustment function, utilizing Bluetooth chip to start audio processing chip and running, under bluetooth earphone being operated in there is the bluetooth mode of audio gain adjustment function,
When needs executive communication, confirm the current present mode of operation of bluetooth earphone;
When bluetooth earphone is in bluetooth mode, by from the microphones of bluetooth earphone to signal outwards sent by the antenna of Bluetooth chip, and the signal received by the antenna from Bluetooth chip directly exports the loud speaker of bluetooth earphone to;
When bluetooth earphone is in the bluetooth mode with audio gain adjustment function, by from the microphones of bluetooth earphone to signal outwards sent by the antenna of Bluetooth chip, and, the signal that antenna from Bluetooth chip receives is inputed to audio processing chip, utilize the volume of audio gain adjustment unit to this signal in audio processing chip to adjust, the signal after adjustment is exported to the loud speaker of bluetooth earphone.
Wherein, the volume of audio gain adjustment unit to this signal is utilized to amplify; Or, utilize the volume of audio gain adjustment unit to this signal to reduce.
Wherein, the volume gain receiving user's transmission arranges instruction, arranges the gain values of instruction instruction, utilize the volume of audio gain adjustment unit to signal to adjust according to volume gain.
The beneficial effect of the embodiment of the present invention is:
The embodiment of the present invention by arranging the audio processing chip with audio gain adjusting module in bluetooth earphone, and utilize the technological means that the running status of Bluetooth chip to this audio processing chip controls, when starting audio processing chip and running, bluetooth earphone is in the bluetooth mode with audio gain adjustment function, the data that Bluetooth chip receives export loud speaker to after audio processing chip adjustment, when forbidding that audio processing chip runs, bluetooth earphone is in bluetooth mode, and audio processing chip does not process the data that Bluetooth chip receives.
The embodiment of the present invention is by the cooperation of Bluetooth chip and audio processing chip, achieve the switching of bluetooth earphone between bluetooth mode and the bluetooth mode with audio gain adjustment function, enrich the function of bluetooth earphone, and when bluetooth earphone is positioned under the bluetooth mode with audio gain adjustment function, the sound of large volume can be sent, be applicable to that there is the user of dysaudia or a riot of sound environment, expand the range of application of bluetooth earphone.
Accompanying drawing explanation
The structural representation of a kind of bluetooth earphone that Fig. 1 provides for one embodiment of the invention;
The structural representation of a kind of bluetooth earphone that Fig. 2 provides for another embodiment of the present invention;
A kind of method flow diagram utilizing bluetooth earphone to communicate that Fig. 3 provides for another embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
One embodiment of the invention provides a kind of bluetooth earphone, see Fig. 1, and the audio processing chip 300, microphone 111 and the loud speaker 112 that be provided with Bluetooth chip 200 in this bluetooth earphone 100, are connected with this Bluetooth chip 200,
Bluetooth chip 200 is provided with microprocessor (Micro Controller Unit, MCU) 214, and input and output able to programme (the Programming Input/Output to be connected with this MCU214, PIO) interface, I2C(inter-integrated circuit, Inter-Integrated Circuit) interface, microphone (MIC) interface 212 and loud speaker (SPK) interface 211, DA(Digital-Analog is provided with in audio processing chip 300, digital-to-analogue) modular converter 312, AD(Analog-Digital, modulus) modular converter 310, audio gain adjustment unit 311 and I2C interface 313.Each module on Bluetooth chip 200 is connected by the cabling on Bluetooth chip 200, and the unit on audio processing chip 300 is connected by the cabling on audio processing chip 300 with each module.
The PIO interface 210 of Bluetooth chip 200 is connected with control switch 110, the I2C interface 213 of Bluetooth chip 200 is connected with the I2C interface on audio processing chip 300, the microphone interface of Bluetooth chip 200 is connected with microphone, and the speaker interface of Bluetooth chip is connected with loud speaker by audio processing chip.
When control switch 110 is in primary importance, as control switch 110 be in enable possition time, MCU214 sends low level signal by I2C interface 213 to audio processing chip 300, forbid that audio processing chip 300 runs, at this moment, audio processing chip 300 only uses as the transmission channel of signal or data.When control switch 110 is in the second place, time as in the close position in control switch 110, MCU sends high level signal by I2C interface to audio processing chip 300, starts audio processing chip and runs.
Bluetooth chip 200 is also provided with radio frequency (RF) module, for utilizing Bluetooth communication receiving and transmitting signal by antenna.
A kind of bluetooth earphone that further embodiment of this invention provides, see Fig. 2, is provided with Bluetooth chip 200, audio processing chip 300, microphone 111 and loud speaker 112 in bluetooth earphone.Audio processing chip 300 in the present embodiment is realized by hearing aid chips.
In order to strengthen the function of bluetooth earphone, in scene shown in Fig. 2, the NFC(short-range communication for wireless near field communication is also provided with in this earphone, Near Field Communication) module, the LED display lamp being used to indicate bluetooth earphone operating state, multiple memory (Memory), flash memory (FLASH), power supply adaptor (Charger) and linear voltage stabilization (LowDropout Regulator, the LDO) module that is connected with this adapter.The crystal oscillator (Crystal) of 26MHZ can also be set in bluetooth earphone, can also be provided with balun (BULUN), radio-frequency (RF) switch (Switch), power amplifier (PA), low noise amplifier (LNA) and band pass filter (BPF) between radio-frequency module and antenna, these devices can be further processed needing the signal of transmitting-receiving.Such as, BULUN transfers the differential signal that Bluetooth chip exports to Single-end output, Bluetooth chip switches by radio-frequency (RF) switch between the transmitting terminal and the receiving terminal of radiofrequency signal of radiofrequency signal, PA is used for the gain of antenna transmission end and amplifies, LNA is used for the gain of antenna receiving terminal and amplifies, and BPF makes the signal of predetermined Bluetooth band (as 2402MHz ~ 2480MHz) pass through.
Be appreciated that above-mentioned NFC module, LED display lamp, memory etc. are not module necessary in bluetooth earphone, can delete in some scenes.
When interrupteur SW 1 closes, Bluetooth chip 200 is started working, and sets up bluetooth and connects.The state of the MCU detection control switch 110 in Bluetooth chip 200, when control switch 110 is in primary importance, confirms that Bluetooth chip is operated in bluetooth mode.When control switch 110 is in the second place, confirm that Bluetooth chip 200 is operated in the bluetooth mode with audio gain adjustment function.Control switch 110 switches under different working modes for making bluetooth earphone.
Bluetooth mode
Under this pattern, if by I2C interface, the in running order MCU of needs of audio processing chip 300 forbids that audio processing chip runs, if audio processing chip 300 has been prohibited to run, then keep the state of this audio processing chip 300 constant.
After radio-frequency module receives data by antenna, after data demodulates is become voice signal, AD conversion module 310 is sent to by SPK interface 211, and the transmitting voice signal exported by SPK interface 211 by AD conversion module 310 and D/A conversion module 312 is to loud speaker 112, loud speaker 112 exports voice signal.In transmitting voice signal process, audio processing chip 300 does not process this voice signal.At this moment, AD conversion module 310 and D/A conversion module 312 and connection between the two are only used as the transmission line of voice signal.
Microphone 111 is after local reception to voice signal, voice signal is inputed to Bluetooth chip by MIC interface 212, voice signal is converted to digital signal by Bluetooth chip, after the modulation of this encoding digital signals, be sent to radio-frequency module, by antenna, this digital signal sent over a bluetooth link by radio-frequency module.
Wherein, microphone 111 is the device of three ends, and Bluetooth chip 200 is also provided with rectifier 215, the first end of microphone is connected with rectifier 215, there is provided bias voltage by rectifier 215 to microphone, the second end of microphone is connected with microphone interface 212, the 3rd end ground connection of microphone.
There is the bluetooth mode of audio gain adjustment function
Under this pattern, if audio processing chip 300 be in be prohibited operating state need MCU by I2C interface start audio processing chip 300 run, if audio processing chip 300 startup optimization, then keep the state of this audio processing chip 300 constant.This pattern is a kind of compatibility mode, and bluetooth earphone, while guarantee Bluetooth communication, the volume of voice can also adjust, such as, amplifies the volume of voice, and this pattern is suitable for having the user of dysaudia to use or other scenes needing volume to amplify.
After radio-frequency module receives data by antenna, after data demodulates is become voice signal, be sent to AD conversion module 310 by SPK interface 211.Voice signal is converted to digital signal by AD conversion module 310, then digital signal is sent into audio gain adjustment unit 311, after audio gain adjustment unit 311 pairs of Digital Signal Processing, digital signal is sent into D/A conversion module 312, digital signal is converted to voice signal and sends into loud speaker 112 and exports by D/A conversion module 312.
Wherein, audio gain adjustment unit 311 can be realized by automatic gain controller (AGC) and digital signal processor (DSP), the output of AD conversion module 310 is connected to the input of AGC, the output of AGC is connected with the input of DSP, and the output of DSP is connected to D/A conversion module 312.Voice signal from
Voice signal is first sent into AGC by AD conversion module 310, and AGC controls the gain of voice signal, and automatically adjusts, and can increase the gain of voice signal, also can reduce the gain of voice signal.Voice signal, to after Gain tuning, is sent into DSP by AGC, completes the adjustment to voice signal volume by DSP.
Further, in the present embodiment, also for AGC is connected to by-pass cock SW2, the yield value change that when by-pass cock SW2 rotates, this AGC provides.The size of voice signal gain can be adjusted by stirring SW2, finding required gain values (can be the gain values in certain limit).Further, in this enforcement, when have chosen the scope of gain values according to SW2, then AGC also can finely tune voice in a certain degree according to the change of voice signal, thus ensure that the audio of bluetooth earphone can be consistent with demand when communicating.
Microphone 111 is after local reception to voice signal, voice signal is inputed to Bluetooth chip by MIC interface 212, voice signal is converted to digital signal by Bluetooth chip, after the modulation of this encoding digital signals, be sent to radio-frequency module, by antenna, this digital signal sent over a bluetooth link by radio-frequency module.
Adopt power supply VB at the hearing aid chips of about 1.4V in the present embodiment, and the power supply VCC of general Bluetooth chip 200 is about 1.35, and the power line VCC of Bluetooth chip 200 and the power line of hearing aid chips are linked together, namely same power supply VBAT is adopted to power to Bluetooth chip and hearing aid chips, compared to employing two power supplys respectively to the scene of Bluetooth chip and hearing aid chips, the scheme of the present embodiment simplifies the structure of bluetooth earphone.
The present invention another embodiment still provides a kind of method utilizing bluetooth earphone to communicate.The method comprises: in bluetooth earphone, arrange the audio processing chip be connected with Bluetooth chip, audio processing chip has audio gain adjustment unit, when receiving bluetooth mode enabled instruction, audio processing chip runs to utilize Bluetooth chip to forbid, under making bluetooth earphone be operated in bluetooth mode; When receiving the enabled instruction of the bluetooth mode with audio gain adjustment function, utilize Bluetooth chip to start audio processing chip and run, under bluetooth earphone being operated in have the bluetooth mode of audio gain adjustment function, see Fig. 3, this method comprises:
S300: when needs executive communication, confirms the current present mode of operation of bluetooth earphone;
S301: when bluetooth earphone is in bluetooth mode, by from the microphones of bluetooth earphone to signal outwards sent by the antenna of Bluetooth chip, and the signal received by the antenna from Bluetooth chip directly exports the loud speaker of bluetooth earphone to;
S302: when bluetooth earphone is in the bluetooth mode with audio gain adjustment function, by from the microphones of bluetooth earphone to signal outwards sent by the antenna of Bluetooth chip, and, the signal that antenna from Bluetooth chip receives is inputed to audio processing chip, utilize the volume of audio gain adjustment unit to this signal in audio processing chip to adjust, the signal after adjustment is exported to the loud speaker of bluetooth earphone.
Wherein, in step s 302, the volume of audio gain adjustment unit to this signal can be utilized to amplify; Or, utilize the volume of audio gain adjustment unit to this signal to reduce.
Wherein, in step s 302, the volume gain receiving user's transmission arranges instruction, arranges the gain values of instruction instruction, utilize the volume of audio gain adjustment unit to signal to adjust according to volume gain.Utilize and receive the instruction of user by sending with by-pass cock, this instruction indicates the scope of the gain values of needs, then utilize audio gain adjustment unit to adjust the volume of signal within the scope of the gain values chosen.
In the inventive method embodiment, the specific works mode of each step can see product embodiments of the present invention.
From the above mentioned, the embodiment of the present invention by arranging the audio processing chip with audio gain adjusting module in bluetooth earphone, and utilize the technological means that the running status of Bluetooth chip to this audio processing chip controls, when starting audio processing chip and running, bluetooth earphone is in the bluetooth mode with audio gain adjustment function, the data that Bluetooth chip receives export loud speaker to after audio processing chip adjustment, when forbidding that audio processing chip runs, bluetooth earphone is in bluetooth mode, audio processing chip does not process the data that Bluetooth chip receives.
The embodiment of the present invention is by the cooperation of Bluetooth chip and audio processing chip, achieve the switching of bluetooth earphone between bluetooth mode and the bluetooth mode with audio gain adjustment function, enrich the function of bluetooth earphone, and when bluetooth earphone is positioned under the bluetooth mode with audio gain adjustment function, the sound of large volume can be sent, be applicable to that there is the user of dysaudia or a riot of sound environment, expand the range of application of bluetooth earphone.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.

Claims (6)

1. a bluetooth earphone, is characterized in that, the audio processing chip, microphone and the loud speaker that be provided with Bluetooth chip in described bluetooth earphone, are connected with this Bluetooth chip,
Described Bluetooth chip is provided with Micro-processor MCV, and input and output PIO interface able to programme, I2C interface, microphone interface and the speaker interface to be connected with this MCU, be provided with digital-to-analogue D/A conversion module, modulus AD conversion module, audio gain adjustment unit and I2C interface in described audio processing chip;
The PIO interface of described Bluetooth chip is connected with control switch;
The I2C interface of described Bluetooth chip is connected with the I2C interface on described audio processing chip;
The microphone interface of described Bluetooth chip is connected with described microphone, wherein said Bluetooth chip is provided with rectifier, the first end of described microphone is connected with described rectifier, second end of described microphone is connected with the microphone interface of described Bluetooth chip, the 3rd end ground connection of described microphone;
The speaker interface of described Bluetooth chip is connected with described loud speaker by described audio processing chip, the speaker interface of wherein said Bluetooth chip is connected to the described AD conversion module of audio processing chip, described AD conversion module is connected to described D/A conversion module, and described D/A conversion module is connected with loud speaker;
Automatic gain controller AGC and digital signal processor DSP is provided with in described audio gain adjustment unit, the output of the AD conversion module of described audio processing chip is connected with the input of described AGC, the output of described AGC is connected with the input of DSP, and the output of described DSP is connected to described D/A conversion module;
When described control switch is in primary importance, by I2C interface, described MCU forbids that described audio processing chip runs;
When described control switch is in the second place, described MCU starts described audio processing chip by I2C interface and runs.
2. bluetooth earphone according to claim 1, is characterized in that,
Described AGC is connected with by-pass cock, the yield value change that when by-pass cock rotates, this AGC provides.
3. bluetooth earphone according to claim 1, is characterized in that,
The power line of described Bluetooth chip is connected with the power line of described audio processing chip.
4. the method utilizing bluetooth earphone to communicate, is characterized in that, arranges the audio processing chip be connected with Bluetooth chip, described audio processing chip has audio gain adjustment unit in bluetooth earphone,
When receiving bluetooth mode enabled instruction, described audio processing chip runs to utilize Bluetooth chip to forbid, under making bluetooth earphone be operated in bluetooth mode;
When receiving the enabled instruction of the bluetooth mode with audio gain adjustment function, utilize Bluetooth chip to start described audio processing chip and run, under bluetooth earphone being operated in have the bluetooth mode of audio gain adjustment function, described method comprises:
When needs executive communication, confirm the current present mode of operation of described bluetooth earphone;
When described bluetooth earphone is in bluetooth mode, by from the microphones of bluetooth earphone to signal outwards sent by the antenna of Bluetooth chip, and the signal received by the antenna from Bluetooth chip directly exports the loud speaker of bluetooth earphone to;
When described bluetooth earphone is in the bluetooth mode with audio gain adjustment function, by from the microphones of bluetooth earphone to signal outwards sent by the antenna of Bluetooth chip, and, the signal that antenna from Bluetooth chip receives is inputed to audio processing chip, utilize the volume of audio gain adjustment unit to this signal in audio processing chip to adjust, the signal after adjustment is exported to the loud speaker of bluetooth earphone.
5. method according to claim 4, is characterized in that, describedly utilizes the audio gain adjustment unit in audio processing chip to carry out adjustment to the volume of this signal to comprise:
The volume of described audio gain adjustment unit to this signal is utilized to amplify; Or,
The volume of described audio gain adjustment unit to this signal is utilized to reduce.
6. method according to claim 4, is characterized in that, describedly utilizes the volume of audio gain adjustment unit to this signal in audio processing chip to adjust, and is comprised by the loud speaker that the signal after adjustment exports bluetooth earphone to:
The volume gain receiving user's transmission arranges instruction;
The gain values of instruction instruction is set according to described volume gain, utilizes the volume of audio gain adjustment unit to signal to adjust.
CN201210466239.9A 2012-11-16 2012-11-16 A kind of bluetooth earphone and the method utilizing bluetooth earphone to communicate Active CN103024621B (en)

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Inventor after: Zheng Yong

Inventor after: Gong Jiantang

Inventor after: Xia Xiaojian

Inventor after: Sun Yibin

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Inventor before: Xia Xiaojian

Inventor before: Sun Yibin

C53 Correction of patent for invention or patent application
COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: ZHENG YONG XIA XIAOJIAN SUN YIBIN TO: ZHENG YONG GONG JIANTANG XIA XIAOJIAN SUN YIBIN