CN201893863U - Multipath audio-video signal switching device - Google Patents
Multipath audio-video signal switching device Download PDFInfo
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- CN201893863U CN201893863U CN2010206833016U CN201020683301U CN201893863U CN 201893863 U CN201893863 U CN 201893863U CN 2010206833016 U CN2010206833016 U CN 2010206833016U CN 201020683301 U CN201020683301 U CN 201020683301U CN 201893863 U CN201893863 U CN 201893863U
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Abstract
本实用新型为多路音视频信号切换设备，控制部分包括单片机控制器和与之相连的键盘和控制命令发送模块。通道切换部分包括2～50路视频、伴音和平衡音频信号的输入端口，分别经抗干扰处理模块接入对应的通道切换补偿模块后接至对应的输出端口。控制命令发送模块连接通道切换部分的控制命令接收模块，后者接与各通道切换补偿模块连接的通道选择控制器。单片机控制器根据键盘输入的选择命令产生切换通道命令，经通道选择控制器送入各通道切换补偿模块，选择通道切换至相应的输出端。单片机控制器接有显示装置，还配有无线遥控器。输入端口可连接各类影视音响设施。本设备可对50路视音频信号任意选择切换，输出无交调、互调、串音干扰。
The utility model is a multi-channel audio and video signal switching device, and the control part includes a single-chip controller, a keyboard connected with it, and a control command sending module. The channel switching part includes 2 to 50 input ports of video, accompanying sound and balanced audio signals, which are respectively connected to the corresponding channel switching compensation module through the anti-interference processing module and then connected to the corresponding output ports. The control command sending module is connected to the control command receiving module of the channel switching part, and the latter is connected to the channel selection controller connected to each channel switching compensation module. The single-chip controller generates a switching channel command according to the selection command input by the keyboard, which is sent to each channel switching compensation module through the channel selection controller, and the selected channel is switched to the corresponding output terminal. The single-chip controller is connected with a display device, and is also equipped with a wireless remote controller. The input port can be connected to various video and audio facilities. This device can choose and switch 50 channels of video and audio signals at will, and the output has no intermodulation, intermodulation, and crosstalk interference.
Description
(1) technical field
The utility model relates to the audio-video signal treatment technology, is specially a kind of multichannel audio-video frequency signal switching apparatus.
(2) background technology
Various audio frequency and video facilities such as television set, DVD, power amplifier, projector, multimedia computer server, video tape recorder often need to occur simultaneously at present, for example in multi-media classroom, meeting room, multifunctional hall, exhibition room, KTV or other public place of entertainment.Owing to have only a display unit (as display or projecting apparatus or TV screen) and one group of sound equipment, can only pick out one road audio-video signal during use and play.This just need select the multichannel audio-video frequency signal of these equipment outputs to switch to be transported on one road audio-video signal passage to export on demand.Every road audio-video signal comprises vision signal, audio signal and balance audio signal.Existing this type of switching device price height only is applicable to the switching of 3 to 5 tunnel audio frequency and video, and it is unstable that output also can take place, and interchannel has the phenomenon of intermodulation, Intermodulation Interference and sound on vision, and output attenuatoin is bigger, and function is simpler, inconvenient operation.
(3) utility model content
The purpose of this utility model is a kind of multichannel audio-video frequency signal switching apparatus of design, input port with tens of roads video, sound accompaniment and audio signal, every road all is connected to anti-interference mould and handover module, and has the signal compensation function, and attenuated output signal is little and do not have intermodulation, intermodulation, a cross-talk.
The multichannel audio-video frequency signal switching apparatus of the utility model design comprises by multichannel audio-video frequency input port, switching device shifter and audio-video signal output port, this programme also has control section, and control section comprises singlechip controller and is attached thereto keyboard and the control command sending module that connects.The passage switching part of this programme design comprises the input port of 2～50 tunnel vision signals, the input port of the input port of 2～50 tunnel audio signals and 2～50 road Balanced Audio signals, connect 2～50 corresponding vision signal anti-interference process modules respectively, 2～50 audio signal anti-interference process modules and 2～50 Balanced Audio signal anti-interference process modules, each vision signal anti-interference process module insert video channel and switch compensating module, each audio signal anti-interference process module inserts sound channel and switches compensating module, each Balanced Audio signal anti-interference process module inserts the Balanced Audio passage and switches compensating module; Video channel is switched compensating module and is connect VT mouth, sound channel and switch that compensating module connects the audio signal output port, the Balanced Audio passage switches compensating module and connects the Balanced Audio signal output port.The passage switching part also has control command receiver module and channel selecting controller; The control command receiver module of the control command sending module interface channel switching part of control section, control command receiver module interface channel selection control, channel selecting controller connect video channel and switch compensating module, sound channel switching compensating module and balance voice-grade channel switching compensating module.
Use keyboard to singlechip controller incoming video signal passage, the select command of audio signal passage and balance audio signal channel, singlechip controller produces the switching channel order according to the select command of keyboard input, send to the control command receiver module of passage switching part by the control command sending module, the control command receiver module is sent order into the channel selecting controller, the channel selecting controller is sent the switching channel order into video channel respectively and is switched compensating module, sound channel switches compensating module and the balance voice-grade channel switches compensating module, and certain channel video signal is selected in control, audio signal passage and balance audio signal channel switch to the output of audio-video signal.
Video channel in this equipment is switched compensating module, sound channel switches compensating module and Balanced Audio passage switching compensating module is to be the switching channel selection circuit of core structure with field programmable gate array (FPGA) chip.
The singlechip controller of this equipment also is connected to display unit, can show current channel video signal, audio signal passage and the balance audio signal channel numbering that is switched to input port on display.Display unit is charactron or LCDs.
The singlechip controller of this equipment also is connected to wireless receiving module, is furnished with Digiplex.Digiplex comprises keypad, microcontroller and wireless transmitter module.But select command with the keypad on the Digiplex also incoming video signal passage, audio signal passage and balance audio signal channel, microcontroller sends the channel selecting order through wireless transmitter module, wireless receiving module receives to be sent into single-chip microcomputer after the command signal and control.The microcontroller of Digiplex also can connect display, and display is charactron or LCD, shows the passage of selecting.
Described video signal input terminal mouth can be connected anolog TV signals or digital television signal or VGA signal etc. with the audio signal input port, can connect various types of video display stereo sets.
The advantage of the utility model multichannel audio-video frequency signal switching apparatus is: 1, can realize 50 road videos/audio signal is switched arbitrarily, and the channel coding of switching is shown; Simultaneously can realize 50 road Balanced Audios are switched arbitrarily, and the channel coding of switching is shown; 2, can control the switching controls of multichannel voice frequency/video by the wired keyboard of conductor length≤1000m, also can carry out switching controls by Digiplex, easy to use; 3, isolation is greater than 25dB mutually between video/sound channel and the balance voice-grade channel, and in switching and transmission course, audio-video signal all satisfies each signalling channel output attenuatoin＜3dB; Each passage can be selected arbitrarily, and output signal does not have intermodulation, intermodulation, cross-talk; 4, the commutation circuit that adopts high performance fpga chip to constitute, switch speed is fast, exports more stablely, and clear image does not have interference such as intermodulation, intermodulation; 5, have the timing shutdown function, can set the time of timing shutdown, but and the Displaying timer time; 6, cost is lower, and quite high cost performance is arranged compared with similar products, is suitable for multi-media classroom, meeting room, and public place of entertainment such as KTV.
(4) description of drawings
Fig. 1 is the overall structure circuit block diagram of this multichannel audio-video frequency signal switching apparatus embodiment;
Fig. 2 is a Digiplex circuit structure block diagram among Fig. 1;
Fig. 3 is a passage switching part structural representation among Fig. 1.
(5) embodiment
This multichannel audio-video frequency signal switching apparatus embodiment comprises passage switching part and control section as shown in Figure 1; Control section comprises singlechip controller and keyboard that is attached thereto and control command sending module; Singlechip controller also is connected to LCDs, wireless receiving module, is furnished with Digiplex.
This routine singlechip controller also is connected to time block, and time block links to each other with the power circuit of equipment, can set the timing shutdown time by keyboard, and this unused time can show on display screen, and when arriving setting-up time, time block is cut off the electricity supply automatically.
This routine Digiplex structure comprises microcontroller and is attached thereto keypad, wireless transmitter module and the charactron that connects as shown in Figure 2.
This routine passage switching part structure as shown in Figure 3, the input port that comprises 30 tunnel vision signals, the input port of the input port of 30 tunnel audio signals and 12 road Balanced Audio signals, connect 30 corresponding vision signal anti-interference process modules respectively, 30 audio signal anti-interference process modules and 12 Balanced Audio signal anti-interference process modules, each vision signal anti-interference process module insert video channel and switch compensating module, each audio signal anti-interference process module inserts sound channel and switches compensating module, each Balanced Audio signal anti-interference process module inserts the Balanced Audio passage and switches compensating module; Video channel is switched compensating module and is connect VT mouth, sound channel and switch that compensating module connects the audio signal output port, the Balanced Audio passage switches compensating module and connects the Balanced Audio signal output port; Switching part also has control command receiver module and channel selecting controller; The control command receiver module of the control command sending module interface channel switching part of control section, control command receiver module interface channel selection control, channel selecting controller connect video channel and switch compensating module, sound channel switching compensating module and balance voice-grade channel switching compensating module.This routine video channel switching compensating module, sound channel switch compensating module and the Balanced Audio passage switches compensating module for field programmable gate array (FPGA) chip being the switching channel selection circuit that core makes up.
Use the select command of the keypad of keyboard or remote controller, show the channel number of corresponding selection on the charactron of display screen and remote controller to singlechip controller incoming video signal passage, audio signal passage and balance audio signal channel.Singlechip controller produces the switching channel order, send to the control command receiver module of passage switching part by the control command sending module, video channel switching compensating module is sent in the switching channel order that the channel selecting controller receives the control command receiver module respectively, sound channel switches compensating module and the balance voice-grade channel switches compensating module, and control selects certain channel video signal, audio signal passage and balance audio signal channel to switch to the output port of correspondence.
Described video signal input terminal mouth can be connected anolog TV signals or digital television signal or VGA signal etc. with the audio signal input port, can connect various video display stereo sets.
The foregoing description is the specific case that the purpose of this utility model, technical scheme and beneficial effect are further described only, and the utility model is not to be defined in this.All any modifications of within scope of disclosure of the present utility model, being made, be equal to replacement, improvement etc., all be included within the protection range of the present utility model.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206833016U CN201893863U (en) | 2010-12-27 | 2010-12-27 | Multipath audio-video signal switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206833016U CN201893863U (en) | 2010-12-27 | 2010-12-27 | Multipath audio-video signal switching device |
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| CN201893863U true CN201893863U (en) | 2011-07-06 |
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| CN2010206833016U Expired - Fee Related CN201893863U (en) | 2010-12-27 | 2010-12-27 | Multipath audio-video signal switching device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701551A (en) * | 2013-12-17 | 2014-04-02 | 深圳市东微智能科技有限公司 | Multichannel digital sound console and signal processing method thereof |
| CN109905750A (en) * | 2017-12-07 | 2019-06-18 | 宏正自动科技股份有限公司 | Synchronous switching method of video stream in video wall system |
| CN111009106A (en) * | 2018-10-05 | 2020-04-14 | 财团法人工业技术研究院 | Human-computer interface system and communication control device thereof |
-
2010
- 2010-12-27 CN CN2010206833016U patent/CN201893863U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701551A (en) * | 2013-12-17 | 2014-04-02 | 深圳市东微智能科技有限公司 | Multichannel digital sound console and signal processing method thereof |
| CN109905750A (en) * | 2017-12-07 | 2019-06-18 | 宏正自动科技股份有限公司 | Synchronous switching method of video stream in video wall system |
| CN111009106A (en) * | 2018-10-05 | 2020-04-14 | 财团法人工业技术研究院 | Human-computer interface system and communication control device thereof |
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20121227 |