CN103686060A - Anti-electromagnetic interference conference terminal - Google Patents
Anti-electromagnetic interference conference terminal Download PDFInfo
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- CN103686060A CN103686060A CN201310668506.5A CN201310668506A CN103686060A CN 103686060 A CN103686060 A CN 103686060A CN 201310668506 A CN201310668506 A CN 201310668506A CN 103686060 A CN103686060 A CN 103686060A
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Abstract
The invention discloses an anti-electromagnetic interference conference terminal. The anti-electromagnetic interference conference terminal comprises a central processing unit, an MCU, a camera and a network module. The MCU, the camera and the network module are respectively connected with the central processing unit, and an analog-digital converter is further arranged between the camera and the central processing unit. The anti-electromagnetic interference conference terminal is characterized in that the anti-electromagnetic interference conference terminal further comprises an infrared receiver and a decoder, the output end of the infrared receiver is connected to the input end of the decoder, and the output end of the decoder is connected to the central processing unit; the infrared receiver comprises an infrared receiving diode, a resistor, a band-pass filter, a demodulator and an NPN transistor. Interference with the communication quality of radio microphones and the video conference terminal caused by communication devices of conference participants or other electromagnetic signals can be avoided through the anti-electromagnetic interference conference terminal, the collection quality of audio signals of the conference terminal is facilitated, and meanwhile the infrared receiver can input the audio signals of the conference terminal with higher quality easily because the band-pass filter and the demodulator are arranged in the infrared receiver.
Description
Technical field
The present invention relates to the video conference terminal communications field, particularly relate to a kind of conference terminal of anti-electromagnetic interference.
Background technology
Along with the development of network technology, network technology successfully applies to video conference.Video conference terminal is the nucleus equipment of video conferencing system, video conference terminal is set up man-to-man connection with the HOST terminal of all conference participations, HOST terminal is responsible for gathering sound and the image in meeting-place, place, then be transferred to video conference terminal, by video conference terminal according to the mode decision of current video meeting processing mode and the forwarding logic to audio frequency and video and other signals, finally the audio, video data after processing is re-send to each participant.The existing video conference terminal equipment for video conference comprises meeting room type, desktop type and Set Top Box type three classes, and Set Top Box type video conference terminal is different from first two, it is not integrated on open PC platform, equipment itself does not have CD-ROM drive, floppy drive, operating system has the feature of high stability, has obtained using widely.
Yet in prior art, for simplifying the wiring in meeting-place, peripheral sound collection equipment generally adopt the mode of radio communication to realize and video conference terminal between transmission of sound signals, but because peripheral sound collection equipment is generally arranged near personnel participating in the meeting more, in conference process, often there is personnel participating in the meeting's communication equipment or the problem that other electromagnetic signals are disturbed the communication quality of wireless microphone and video conference terminal.
Summary of the invention
For above-mentioned realize existing because peripheral sound collection equipment is generally arranged near personnel participating in the meeting more, in conference process, often there is personnel participating in the meeting's communication equipment or the problem that other electromagnetic signals are disturbed the communication quality of wireless microphone and video conference terminal, the invention provides a kind of conference terminal of anti-electromagnetic interference.
For addressing the above problem, the conference terminal of a kind of anti-electromagnetic interference provided by the invention achieves the goal by following technical essential: a kind of conference terminal of anti-electromagnetic interference, comprise central processing unit, MCU, camera and mixed-media network modules mixed-media, described MCU, camera, mixed-media network modules mixed-media is connected with central processing unit respectively, between described camera and central processing unit, be also provided with analog to digital converter, it is characterized in that, also comprise infrared remote receiver and decoder, the output of described infrared remote receiver is connected on the input of decoder, the output of decoder is connected on central processing unit,
Described infrared remote receiver comprises infrared receiving diode, resistance, band pass filter, demodulator and NPN pipe, described band pass filter and demodulator are connected between the backward end of infrared receiving diode and the base stage of NPN pipe, and band pass filter is positioned at the front end of demodulator, the collector electrode of the grounded emitter of NPN pipe, NPN pipe is connected with control end, and resistance is connected between collector electrode and control end, the backward end of infrared receiving diode.
Development along with infrared communication technique, the FIR technology of the existing 4M of having transmission rate is widely used, and transmission range can reach more than 30 meters, in the present invention, the infrared remote receiver arranging is as the audio collection port of video conference terminal, by supporting infrared emission end on peripheral sound collection equipment, the infrared ray of usining transmits voice data information as carrier.It is a kind of as radio communication, compare with radio communication, because its ratio of performance to price is high, realize simple, be convenient to high-speed applications, space access, economy, the more important thing is, the anti-electromagnetic interference feature that it has, when its communication mode as video conference terminal and peripheral sound collection equipment, can avoid personnel participating in the meeting's communication equipment or the communication quality that other electromagnetic signals are disturbed wireless microphone and video conference terminal.
The NPN pipe arranging can be realized the control whether infrared signal is received and have certain signal strength signal intensity enlarging function, is beneficial to the voice signal intensity that video conference terminal finally obtains; The band pass filter and the demodulator that arrange are used for obtaining specific carrier frequency, in band pass filter, filter the high and low frequency that surpasses setpoint frequency scope, in demodulator, realize signal continuous, this is provided with and is beneficial to infrared remote receiver to the signal quality of conference terminal output.
Further technical scheme is:
For the amplifier further arranging is used for further infrared signal being amplified, be beneficial to the voice signal intensity that video conference terminal finally obtains, between the backward end of described infrared receiving diode and band pass filter, be also in series with amplifier.
Whether suitable, also comprise the loud speaker being connected on central processing unit if for ease of the audio signal that video conference terminal is received, directly reproducing with the setting angle of check ancillary equipment, be also provided with digital to analog converter between described loud speaker and central processing unit.
For obtaining more audio signal sample end, also comprise built-in microphone, described built-in microphone is connected with central processing unit, is also provided with analog to digital converter between described built-in microphone and central processing unit.
Also comprise audio output interface, VGA output interface and HDMI output interface, described audio output interface, VGA output interface and HDMI output interface are connected on central processing unit, between described audio output interface, VGA output interface and central processing unit, are also provided with digital to analog converter.
The VGA output interface, HDMI output interface and the audio output interface that arrange are connected respectively to after external equipment, can export respectively analog rgb+HV signal, high-definition digital signal and audio signal to external equipment, be convenient to the sound of other video conference places and picture signal to present in real time in this meeting-place.
The present invention has following beneficial effect:
1, in the present invention, the infrared remote receiver of setting is as the audio collection port of video conference terminal, and by supporting infrared emission end on peripheral sound collection equipment, the infrared ray of usining transmits voice data information as carrier.It is a kind of as radio communication, compare with radio communication, because its ratio of performance to price is high, realize simple, be convenient to high-speed applications, space access, economy, the more important thing is, the anti-electromagnetic interference feature that it has, when its communication mode as video conference terminal and peripheral sound collection equipment, can avoid personnel participating in the meeting's communication equipment or the communication quality that other electromagnetic signals are disturbed wireless microphone and video conference terminal, be conducive to the acquisition quality of conference terminal audio signal.
2, the NPN pipe arranging can be realized the control whether infrared signal is received and have certain signal strength signal intensity enlarging function, is beneficial to the voice signal intensity that video conference terminal finally obtains; The band pass filter and the demodulator that arrange are used for obtaining specific carrier frequency, in band pass filter, filter the high and low frequency that surpasses setpoint frequency scope, in demodulator, realize signal continuous, this is provided with and is beneficial to infrared remote receiver to the audio signal quality of conference terminal output.
Accompanying drawing explanation
Fig. 1 is the topological diagram of a specific embodiment of conference terminal of a kind of anti-electromagnetic interference of the present invention;
Fig. 2 is the schematic diagram of the conference terminal infrared remote receiver of a kind of anti-electromagnetic interference of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but structure of the present invention is not limited only to following examples.
Embodiment 1:
As Fig. 1 and Fig. 2, a kind of conference terminal of anti-electromagnetic interference, comprise central processing unit, MCU, camera and mixed-media network modules mixed-media, described MCU, camera, mixed-media network modules mixed-media are connected with central processing unit respectively, between described camera and central processing unit, be also provided with analog to digital converter, it is characterized in that, also comprise infrared remote receiver and decoder, the output of described infrared remote receiver is connected on the input of decoder, and the output of decoder is connected on central processing unit; Described infrared remote receiver comprises infrared receiving diode, resistance, band pass filter, demodulator and NPN pipe, described band pass filter and demodulator are connected between the backward end of infrared receiving diode and the base stage of NPN pipe, and band pass filter is positioned at the front end of demodulator, the collector electrode of the grounded emitter of NPN pipe, NPN pipe is connected with control end, and resistance is connected between collector electrode and control end, the backward end of infrared receiving diode.
Development along with infrared communication technique, the FIR technology of the existing 4M of having transmission rate is widely used, and transmission range can reach more than 30 meters, in the present invention, the infrared remote receiver arranging is as the audio collection port of video conference terminal, by supporting infrared emission end on peripheral sound collection equipment, the infrared ray of usining transmits voice data information as carrier.It is a kind of as radio communication, compare with radio communication, because its ratio of performance to price is high, realize simple, be convenient to high-speed applications, space access, economy, the more important thing is, the anti-electromagnetic interference feature that it has, when its communication mode as video conference terminal and peripheral sound collection equipment, can avoid personnel participating in the meeting's communication equipment or the communication quality that other electromagnetic signals are disturbed wireless microphone and video conference terminal.
The NPN pipe arranging can be realized the control whether infrared signal is received and have certain signal strength signal intensity enlarging function, is beneficial to the voice signal intensity that video conference terminal finally obtains; The band pass filter and the demodulator that arrange are used for obtaining specific carrier frequency, in band pass filter, filter the high and low frequency that surpasses setpoint frequency scope, in demodulator, realize signal continuous, this is provided with and is beneficial to infrared remote receiver to the signal quality of conference terminal output.
In the present embodiment, adopt the MCU that model is ME8000, mixed-media network modules mixed-media, the analog to digital converter that model is Cisco 2600 to adopt AD9280, the infrared remote receiver arranging adopts the TSOP12xx series of Vishay, makes transmission range of the present invention can reach 35 meters, to adapt to large-scale meeting-place.
Embodiment 2:
The present embodiment is further improved on the basis of embodiment 1, as Fig. 1, a kind of conference terminal of anti-electromagnetic interference, also comprise audio output interface, VGA output interface and HDMI output interface, described audio output interface, VGA output interface and HDMI output interface are connected on central processing unit, described audio output interface, between VGA output interface and central processing unit, be also provided with digital to analog converter, also comprise built-in microphone, described built-in microphone is connected with central processing unit, between described built-in microphone and central processing unit, be also provided with analog to digital converter.
Embodiment 3:
The present embodiment is further qualified on the basis of embodiment 1, as Fig. 2, for the amplifier further arranging is used for further infrared signal being amplified, be beneficial to the voice signal intensity that video conference terminal finally obtains, between the backward end of described infrared receiving diode and band pass filter, be also in series with amplifier.
Claims (5)
1. the conference terminal of an anti-electromagnetic interference, comprise central processing unit, MCU, camera and mixed-media network modules mixed-media, described MCU, camera, mixed-media network modules mixed-media are connected with central processing unit respectively, between described camera and central processing unit, be also provided with analog to digital converter, it is characterized in that, also comprise infrared remote receiver and decoder, the output of described infrared remote receiver is connected on the input of decoder, and the output of decoder is connected on central processing unit;
Described infrared remote receiver comprises infrared receiving diode, resistance, band pass filter, demodulator and NPN pipe, described band pass filter and demodulator are connected between the backward end of infrared receiving diode and the base stage of NPN pipe, and band pass filter is positioned at the front end of demodulator, the collector electrode of the grounded emitter of NPN pipe, NPN pipe is connected with control end, and resistance is connected between collector electrode and control end, the backward end of infrared receiving diode.
2. the conference terminal of a kind of anti-electromagnetic interference according to claim 1, is characterized in that: between the backward end of described infrared receiving diode and band pass filter, be also in series with amplifier.
3. the conference terminal of a kind of anti-electromagnetic interference according to claim 1, is characterized in that: also comprise the loud speaker being connected on central processing unit, be also provided with digital to analog converter between described loud speaker and central processing unit.
4. the conference terminal of a kind of anti-electromagnetic interference according to claim 1, is characterized in that: also comprise built-in microphone, described built-in microphone is connected with central processing unit, is also provided with analog to digital converter between described built-in microphone and central processing unit.
5. according to the conference terminal of a kind of anti-electromagnetic interference described in any one in claim 1 to 4, it is characterized in that: also comprise audio output interface, VGA output interface and HDMI output interface, described audio output interface, VGA output interface and HDMI output interface are connected on central processing unit, between described audio output interface, VGA output interface and central processing unit, are also provided with digital to analog converter.
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| CN201310668506.5A CN103686060A (en) | 2013-12-11 | 2013-12-11 | Anti-electromagnetic interference conference terminal |
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| CN201310668506.5A CN103686060A (en) | 2013-12-11 | 2013-12-11 | Anti-electromagnetic interference conference terminal |
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| CN103686060A true CN103686060A (en) | 2014-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107257448A (en) * | 2017-08-09 | 2017-10-17 | 成都全云科技有限公司 | A kind of video conferencing system exchanged with font |
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| CN101964715A (en) * | 2009-07-24 | 2011-02-02 | 深圳市台电实业有限公司 | Digital conference discussion system and digital conference communication method |
| CN103313029A (en) * | 2013-06-28 | 2013-09-18 | 成都思迈科技发展有限责任公司 | Terminal for video conference |
| CN203632788U (en) * | 2013-12-11 | 2014-06-04 | 成都北岸科技有限公司 | Network conference terminal whose audio signals are anti-electromagnetic interference |
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2013
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Patent Citations (7)
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|---|---|---|---|---|
| CN2248427Y (en) * | 1995-04-26 | 1997-02-26 | 庄力群 | Infrared speech sounds signal transfer receiver |
| US20070172045A1 (en) * | 2005-05-10 | 2007-07-26 | Samsung Electronics Co., Ltd. | Instant conference method and apparatus |
| CN2807621Y (en) * | 2005-06-24 | 2006-08-16 | 赵卫东 | Extended infrared light-operated transmitting and receiving device |
| CN101159572A (en) * | 2007-08-24 | 2008-04-09 | 深圳市台电实业有限公司 | Digital session discussing system |
| CN101964715A (en) * | 2009-07-24 | 2011-02-02 | 深圳市台电实业有限公司 | Digital conference discussion system and digital conference communication method |
| CN103313029A (en) * | 2013-06-28 | 2013-09-18 | 成都思迈科技发展有限责任公司 | Terminal for video conference |
| CN203632788U (en) * | 2013-12-11 | 2014-06-04 | 成都北岸科技有限公司 | Network conference terminal whose audio signals are anti-electromagnetic interference |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107257448A (en) * | 2017-08-09 | 2017-10-17 | 成都全云科技有限公司 | A kind of video conferencing system exchanged with font |
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Application publication date: 20140326 |