CN101707496A - Wireless headphone system - Google Patents
Wireless headphone system Download PDFInfo
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- CN101707496A CN101707496A CN200810119103A CN200810119103A CN101707496A CN 101707496 A CN101707496 A CN 101707496A CN 200810119103 A CN200810119103 A CN 200810119103A CN 200810119103 A CN200810119103 A CN 200810119103A CN 101707496 A CN101707496 A CN 101707496A
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Abstract
The invention relates to the communication field, in particular to a wireless headphone system. The invention provides a wireless headphone system which has small printed circuit board volume and low circuit power consumption as an electronic product power-supplied by batteries. The wireless headphone system comprises a wireless headphone and a voice gateway; the structural key points thereof are that the hardware components of the voice gateway comprise a host machine, a radio frequency transceiving module and a coding/decoding module; the voice data accessed from the host machine is sent to a PCM coder through an audio interface to be coded into digital signals, and then sent to a Bluetooth module through a PCM interface; the Bluetooth module converts the digital signals to radio signals to be sent to the headphone; the hardware of the headphone system comprises a radio frequency transceiving module, a coding/decoding module and a voice input-output module; the radio frequency transceiving module is used for storing protocol and wireless headphone application program; a coding/decoding chip is connected with the radio frequency module through a PCM interface; and the voice input-output module comprises a microphone and a loudspeaker.
Description
Technical field:
The present invention relates to the communications field, especially relates to a kind of wireless headphone system.
Background technology:
Along with the develop rapidly of Computers and Communication technology, compunication is used widely, and hardware technology is with rapid changepl. never-ending changes and improvements, and its general trend develops towards high integration, high stability, high speed and high performance-price ratio direction.Wireless headset communication system or radio telephone hands-free device then are present widely used communication form, but present wireless headphone system exists some shortcomings, the one, and printed circuit board volume is big; The 2nd, as battery powered electronic product, the power consumption height of circuit.
Summary of the invention:
The present invention is exactly at the problems referred to above, provides a kind of printed circuit board volume little, and as battery powered electronic product, the power consumption of circuit wireless headphone system.
For achieving the above object, the present invention adopts following technical scheme, the present invention includes wireless headset, voice gateways, its structural feature is that the hardware group composition of described voice gateways is main frame, radio-frequency (RF) receiving and transmission module and coding/decoding module, the speech data that main frame inserts is given PCM by audio interface and is compiled/be encoded into digital signal, pass to bluetooth module by pcm interface, bluetooth module is converted to wireless signal transmission with digital signal and goes out and pass to earphone; The hardware of described earphone system is made up of radio-frequency (RF) receiving and transmission module, coding/decoding module, sound input/output module, described radio-frequency (RF) receiving and transmission module is used for storage protocol and wireless headset application program, codec chip links to each other with radio-frequency module by pcm interface, and the sound input/output module comprises microphone and loud speaker.Microphone converts acoustic signals to analog signal as voice-input device; Loud speaker converts analog electrical signal to acoustic signals as voice-output device.
As preferred version one, the transceiver that rf chip adopts nRF9E5 communicates by inner parallel port or inner SPI mouth and other module, has the identical functions with monolithic radio frequency transceiver nRF905; Transceiver passes through parallel port or SPI mouth and the micro-controller communications of MCU in the sheet, DSR, and carrier wave detects and address matching signal can be as microcontroller and interruption.
As preferred version two, described nRF9E5 rf chip, interior microcontroller of sheet and standard 8051 compatibilities, its interrupt control unit is supported 5 expansion interrupt source: ADC interruption, SPI interruption, RADI01 interruption, RADI02 interrupts and wake timer up interrupts.The sheet internal controller also has 3 timers identical with 8052.1 serial ports identical with 8051 can be used as the baud rate generator of asynchronous communication with timer 1 and timer 2.In addition, 2 data pointers have also been expanded, to be convenient to reading of data from the XRAM district.
Beneficial effect of the present invention:
1, anti-interference:
Radio frequency chip of the present invention has adopted nRF9E5, and its biggest advantage is to have the carrier wave measuring ability; Under the ShockBurst receive mode, during radio-frequency carrier in the nRF9E5 working channel occurring, carrier wave detects pin (CD) and is put height, and this characteristic has well been avoided the collision between the different emitter data bags under the same operating frequency, has effectively prevented the interference of signal.
2, reduce system power dissipation:
NRF9E5 only just can carry out transfer of data with nRF905 with simple SPI interface, and the speed of transfer of data depends on the speed of SPI interface, and this can be configured in 8051 kernels in the nRF9E5 sheet.ShockBurst realizes the low speed data input, and high-speed data is exported, thereby has reduced the average energy consumption of system.
Description of drawings:
Fig. 1 hardware structure diagram of the present invention;
Fig. 2 is an earphone transmitting-receiving flow chart of the present invention;
Fig. 3 is a voice gateways transmitting-receiving flow chart of the present invention.
Embodiment:
In Fig. 1.Whole system comprises two parts, wireless headset and voice gateways.The hardware group composition of voice gateways is main frame (PC or mobile phone), radio-frequency (RF) receiving and transmission module and coding/decoding module; The coding/decoding module adopts Motorola MC 145483 to link to each other with radio-frequency module by pcm interface, and the speech data that machine inserts is given PCM by audio interface and compiled/be encoded into digital signal; Pass to bluetooth module by pcm interface, bluetooth module is converted to wireless signal transmission with digital signal and goes out and pass to earphone; According to same principle, bluetooth module receives the wireless signal that earphone transmits and converts thereof into digital signal and passes to the PCM coding/decoding by pcm interface and become voice analog signal, passes to main frame again.
The hardware of earphone system is made up of 4 parts: radio-frequency (RF) receiving and transmission module, coding/decoding module, sound input/output module.Wherein contain micro-control among the radio-frequency (RF) receiving and transmission module nRF9E5, the data RAM of 256B and the ROM of 512B are contained in its micro-control inside, are used for storage protocol and wireless headset application program; NRF9E5 has abundant I/O mouth, and these I/O mouth lines all support both-way communication and chip internal to have pull-up resistor, by can directly reading the pulse signal that button is pressed behind the last button, and triggers Interrupt Process thus; Codec chip adopts Motorola MC 145483, links to each other with radio-frequency module by pcm interface; The sound input/output module comprises microphone and loud speaker, and microphone converts acoustic signals to analog signal as voice-input device; Loud speaker converts analog electrical signal to acoustic signals as voice-output device.
The earphone system software design
By wireless headset, need not use any line just can start or finish conversation.Behind the ring, only the button that need press on the earphone just can receive calls; When calling, then can behind the button of pressing on the earphone, utilize sound to call out.
After system powered on, earphone was in accepting state, and this moment, timer was also opened, in the timing scope, earphone constantly is in accepting state, and when overtime, system enters interruption, to judge whether at first that in interruption button presses, if actuation of keys is arranged, then carry out the button program, when carrying out the button program, at first to judge and answer the call or make a phone call, and then carry out corresponding operation; When making a phone call, will open transmitter, up to end of conversation; When answering the call, then to close emission and the unlatching receiver, up to end of conversation.When end of conversation, this moment, beard and hair END command and then was got back to initially, entered holding state earphone transmitting-receiving flow chart as shown in Figure 2.
And voice gateways are at first carried out initialization after system powers on, and just open receiver then to judge whether to receive useful signal, if receive the useful signal that will receive calls, this moment, voice gateways were opened emission with regard to turning off reception.It is that unit sends that data send with the frame, and every frame comprises 8.When sending frame data, enter time-delay, open the END command of reception then to judge whether to receive that earphone sends over, if do not receive, the expression conversation does not also finish, just turn off receiver this moment and continue to send useful signal, up to receiving END command to get back to initial state, its voice gateways transmitting/receiving program as shown in Figure 3.
Claims (3)
1. wireless headphone system comprises wireless headset, voice gateways, it is characterized in that it being that the hardware group composition of described voice gateways is main frame, radio-frequency (RF) receiving and transmission module and coding/decoding module, the speech data that main frame inserts is given PCM by audio interface and is compiled/be encoded into digital signal, pass to bluetooth module by pcm interface, bluetooth module is converted to wireless signal transmission with digital signal and goes out and pass to earphone; The hardware of described earphone system is made up of radio-frequency (RF) receiving and transmission module, coding/decoding module, sound input/output module, described radio-frequency (RF) receiving and transmission module is used for storage protocol and wireless headset application program, codec chip links to each other with radio-frequency module by pcm interface, and the sound input/output module comprises microphone and loud speaker.
2. wireless headphone system according to claim 1, it is characterized in that transceiver that radio-frequency (RF) receiving and transmission module adopts the nRF9E5 rf chip communicates by inner parallel port or inner SPI mouth and other module, has the identical functions with monolithic radio frequency transceiver nRF905; Transceiver passes through parallel port or SPI mouth and the micro-controller communications of MCU in the sheet, DSR, and carrier wave detects and address matching signal can be as microcontroller and interruption.
3. wireless headphone system according to claim 2, it is characterized in that at described nRF9E5 rf chip, interior microcontroller of sheet and standard 8051 compatibilities, its interrupt control unit are supported 5 expansion interrupt source: ADC interruption, SPI interruption, RADIO1 interruption, RADIO2 interrupts and wake timer up interrupts.The sheet internal controller also has 3 timers identical with 8052.1 serial ports identical with 8051 can be used as the baud rate generator of asynchronous communication with timer 1 and timer 2.In addition, 2 data pointers have also been expanded, to be convenient to reading of data from the XRAM district.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810119103A CN101707496A (en) | 2008-08-27 | 2008-08-27 | Wireless headphone system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810119103A CN101707496A (en) | 2008-08-27 | 2008-08-27 | Wireless headphone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101707496A true CN101707496A (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810119103A Pending CN101707496A (en) | 2008-08-27 | 2008-08-27 | Wireless headphone system |
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| CN (1) | CN101707496A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111696A (en) * | 2010-12-24 | 2011-06-29 | 陕西科技大学 | Method for reducing power consumption of bluetooth headset |
| CN104350683A (en) * | 2012-06-08 | 2015-02-11 | 3M创新有限公司 | Modular communication device and system |
-
2008
- 2008-08-27 CN CN200810119103A patent/CN101707496A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111696A (en) * | 2010-12-24 | 2011-06-29 | 陕西科技大学 | Method for reducing power consumption of bluetooth headset |
| CN104350683A (en) * | 2012-06-08 | 2015-02-11 | 3M创新有限公司 | Modular communication device and system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100512 |