A kind of new digital conference system
Technical field
The present invention relates to conference system, particularly a kind of new digital conference system.
Background technology
Most basic conference system, is made up of microphone, power amplifier, combined acoustics, and they serve transaudient, display, public address
Effect, reaching can see, can listen, can speak.
All it is together in series with industrial siding between all microphones in conference system, finally to conference host, as handed in hand one
As.When underway large-scale group's meeting is exchanged, conference speech person is numerous, and conference speech system can guarantee that each human hair hand in hand
Speech is very convenient, while being easy to conference management again however, digital conference system is all by a connection microphone and service at present
Device, once some microphone or junction are broken down, can cause whole conference system to work, while microphone and master
The line of machine can not be long, the microphone line of overlength, and voice signal interference and relaxation phenomenon are serious, have a strong impact on conference speech
Definition, then there is the conference host flexibly cannot to be controlled to each microphone unit, therefore traditional conference system control
Operation is very inconvenient.
The content of the invention
It is simple it is an object of the invention to provide one kind wiring in order to overcome the disadvantages mentioned above of prior art, the two-way biography of signal
Defeated, long distance of signal transmission, strong antijamming capability, and can flexibly control the digital conference system of each microphone unit.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of new digital conference system, including conference host and several microphone units, wherein:The conference host sets
Major and minor signal input port module is equipped with, described several microphone units are connected on major and minor signal input by cable signal line
Between port module, the conference host also include buffer input signal circuit, power amplifier module, CPU processor, bluetooth module,
RS-485 communication interface modules and power voltage step down module, the input major and minor signal of connection of the buffer input signal circuit are defeated
Inbound port module, output end wired power amplifier module, the bluetooth module, the control signal wire of RS-485 communication interface modules all with
CPU processor is connected, and the bluetooth module is connected by Bluetooth signal with intelligent mobile terminal, the RS-485 communication interfaces mould
Block interface is connected by netting twine with host computer, power output end connection CPU processor and the power amplifier of the power voltage step down module
Module, power input connection civil power, the microphone unit includes T-shaped exchanger, the microphone base for microphone unit of connecting
And the microphone on microphone base.
As a further improvement on the present invention:The T-shaped exchanger includes three port link blocks, i.e. series signals are defeated
Inbound port module, series signals output port module and audio signal input end mouth mold block, the audio signal input end mouth mold
Block connects the audio control signal output port of microphone stand by cable, and the series signals input port module passes through cable
The signal primary input interface of line connection conference host or the series signals output port module of upper level t connector, the string
Connection signal output port module connects the signal auxiliary input interface of conference host or the string of next stage t connector by cable
Connection signal output part enters module.
As a further improvement on the present invention:The series signals input port module, series signals output port module
And audio signal input end mouth mold block is RJ45 Wiring port modules.
As a further improvement on the present invention:The microphone base includes the dsp chip for audio and noise reduction process, uses
In control microphone and the MCU processors of reception control signal, the dsp chip is by A/D signal adapters, DSP signal processors
And D/A signal adapters are constituted, the signal input part connection A/D signal adapters of the DSP signal processors, signal output part
Connection D/A signal adapters, the microphone is connected by A/D signal adapters with DSP signal processors, and the D/A signals turn
The output end of parallel operation is connected through operational amplification circuit module with audio control signal output port, the control of the MCU processors
Input connects audio control signal output port, controlled output port connection DSP signal processors, the audio control signal
Output port is connected by cable with T-shaped exchanger.
Compared with prior art, the beneficial effects of the invention are as follows:Microphone unit of the present invention can be serially connected and be followed by into major and minor
Signal input port module, connects up simple and clear;The series signals input port module of T-shaped exchanger, series signals output end
Mouth mold block can be to both direction input signal to conference host, it is to avoid uniline is damaged, and causes message interrupts, improves microphone
Incoming line stability, and break-make between microphone is independent of each other;The microphone stand of microphone unit is provided with regulation microphone audio
DSP signal processors, can control DSP signal processors by remotely sending MCU processors of the control signal to microphone base
Audio effect, you can conference host is connected by intelligent mobile terminal or host computer, each is set by conference host
The audio effect of microphone;The microphone stand of microphone unit is provided with operational amplification circuit module, can be at through DSP signal processors
The analog signal managed is amplified, and low level analog signal is enlarged into the analog signal of high level, the high level for making
Analog signal is input to the buffer input signal circuit of conference host through the cable signal of long range, through buffer input signal circuit
The analoging sound signal of high level is reduced to normal low level analoging sound signal, therefore message antidamping of the invention
Property and anti-interference are stronger, can transmit farther distance so that the sound of conference system becomes apparent from.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is conference host structural representation of the invention;
Fig. 3 is microphone unit structural representation.
Fig. 4 is buffer input signal electrical block diagram of the invention.
Specific embodiment
In conjunction with brief description of the drawings, the present invention is further described with embodiment:
Referring to figs. 1 to Fig. 4, a kind of new digital conference system, including conference host and several microphone units, wherein:Institute
State conference host and be provided with major and minor signal input port module, described several microphone units are connected on by cable signal line
Between major and minor signal input port module, the conference host also includes buffer input signal circuit, power amplifier module, CPU treatment
Device, bluetooth module, RS-485 communication interface modules and power voltage step down module, the input connection of the buffer input signal circuit
Major and minor signal input port module, output end wired power amplifier module, the bluetooth module, the control of RS-485 communication interface modules
Holding wire processed is all connected with CPU processor, and the bluetooth module is connected by Bluetooth signal with intelligent mobile terminal, the RS-
485 communication interface module interfaces are connected by netting twine with host computer, the power output end connection CPU of the power voltage step down module
Processor and power amplifier module, power input connection civil power, the microphone unit include the T-shaped exchange for microphone unit of connecting
Microphone on device, microphone base and microphone base.
The T-shaped exchanger includes three port link blocks, i.e. series signals input port module, series signals output
Port module and audio signal input end mouth mold block, the audio signal input end mouth mold block connect microphone stand by cable
Audio control signal output port, the series signals input port module is defeated by the signal master that cable connects conference host
The series signals output port module of incoming interface or upper level t connector, the series signals output port module is by electricity
The signal auxiliary input interface of cable connection connection conference host or the series signals output end of next stage t connector enter module.
The series signals input port module, series signals output port module and audio signal input end mouth mold block are
RJ45 Wiring port modules.
The microphone base includes the dsp chip for audio and noise reduction process, for controlling microphone and receiving control letter
Number MCU processors, by A/D signal adapters, DSP signal processors and D/A signal adapters are constituted the dsp chip, institute
The signal input part connection A/D signal adapters of DSP signal processors are stated, signal output part connection D/A signal adapters are described
Microphone is connected by A/D signal adapters with DSP signal processors, and the output end of the D/A signal adapters is through operation amplifier
Circuit module is connected with audio control signal output port, the control signal connection audio control signal of the MCU processors
Output port, controlled output port connection DSP signal processors, the audio control signal output port passes through cable and T
Type exchanger is connected.
In sum, after one of ordinary skill in the art reads file of the present invention, technology according to the present invention scheme with
Technology design makes other various corresponding conversion schemes without creative mental labour, belongs to the model that the present invention is protected
Enclose.