CN1477798A - Video data transceiver - Google Patents
Video data transceiver Download PDFInfo
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- CN1477798A CN1477798A CNA021345910A CN02134591A CN1477798A CN 1477798 A CN1477798 A CN 1477798A CN A021345910 A CNA021345910 A CN A021345910A CN 02134591 A CN02134591 A CN 02134591A CN 1477798 A CN1477798 A CN 1477798A
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Abstract
The present invention relates to the field of video signal transmission technology, and provides a video data receiving/transmitting device, its transmitting device can transfer the video signal into the receiving device by means of optical fibre, the transmitting device includes parallel-serial converter, transmitting end photoelectric converter, synchronous pulse generator, and its receiving device includes receiving end photoelectric converter, serial-parallel converter and phase aligning processor.
Description
Technical field
The present invention relates to the image information transmission technology, more particularly, relate to a kind of video data transceiver, can be used for 28 road video data signals with the multimedia display card converts one road signal to and transmits through fiber plant, and then it is received and decomposition-reduction becomes 28 road video datas, deliver to another display card.
Background technology
In the existing Large Screen Display Technology, for example on stadiums or large ship, generally be to utilize Ethernet to come transmission of video and audio-frequency information, because the data of video image are very big, the transmission speed of existing network can not satisfy its needs usually, cause losing of the slow and data of image transfer rate, have a strong impact on the effect that displays the play, and be not suitable for the expansion of distance.
As depicted in figs. 1 and 2, in the prior art, if being sent to the far-end large-screen in real time, the computer picture shows, the large-screen in the stadium for example, need earlier by sending the reception main frame that main frame sends to vision signal by grid line far-end, but 28 tunnel vision signals of this main frame can not directly be delivered to large-screen, also need in the middle of this through in the set of signals, the mode of decomposing could guarantee that signal transmits and entanglement can not occur and lose, reduced the interference of a lot of circuits, therefore also need to send video data converter and convert 28 tunnel vision signals to 5 road LVDS (differential level signal) by one, this transducer can be connected on the main frame under the large-screen, be sent to the large-screen place through cable, by the receiving video data transducer this 5 road LVDS level signal is restored 28 tunnel vision signals again, this transducer can be connected in other signal driver front ends on the large-screen, outputs to large-screen display equipment again and shows.This mode has adopted two main frames because vision signal is to be transferred to the reception main frame of far-end from sending main frame by grid line, sends large-screen to by receiving main frame again, and the speed of transfer of data is lower, can not real-time transmission data; And poor anti jamming capability has loss of data often.
Summary of the invention
The technical problem to be solved in the present invention is that the above-mentioned shortcoming at prior art provides a kind of video data transceiver, utilizes optical fiber to transmit vision signal, and quick to guarantee, high-quality vision signal transmits.
The technical solution adopted for the present invention to solve the technical problems is: a kind of video data transceiver, comprise dispensing device and receiving system, and it is characterized in that described dispensing device sends to described receiving system by optical fiber with vision signal; Described dispensing device comprise be used for parallel level signal be converted to the serial level signal parallel-to-serial converter, be used for described serial level signal is converted to the transmitting terminal optical-electrical converter of light signal, and be used to described parallel-to-serial converter that the lock-out pulse generator of synchronization pulse is provided; Described receiving system comprises that the light signal that is used for receiving is converted to the receiving terminal optical-electrical converter of serial level signal, is used for the serial level signal being converted to the deserializer of parallel level signal and being used for the parallel level signal that restores is carried out the phase alignment processor that phase alignment is handled.
According to video data transceiver of the present invention:
(1), in described dispensing device, be provided with two parallel-to-serial converters and two transmitting terminal optical-electrical converters, the output of each parallel-to-serial converter is connected to the input of a transmitting terminal optical-electrical converter, and the synchronization pulse that described lock-out pulse generator produces outputs to described two parallel-to-serial converters respectively makes its synchronous working;
(2), in described receiving system, be provided with two deserializers and two receiving terminal optical-electrical converters, the output of each receiving terminal optical-electrical converter is connected to the input of a deserializer, described phase alignment processor be connected described two deserializers output, be used for that the two-part parallel level signal that restores is carried out phase alignment and handle.
In the video data transceiver of above-mentioned employing two-way parallel-to-serial converter, can be connected by two optical fiber between described dispensing device and the receiving system, also can connect by simple optical fiber, when adopting a kind of mode in back, in described dispensing device, also comprise an input and the wave multiplexer that the output of described two transmitting terminal optical-electrical converters is connected, output is connected with described optical fiber, be combined into one road light signal by the described wave multiplexer of two ways of optical signals of two transmitting terminal optical-electrical converters output and be sent to described receiving system through described optical fiber again; In described receiving system, also comprise the channel-splitting filter that an input is connected with described optical fiber, output is connected with the input of described two receiving terminal optical-electrical converters, the road light signal that is transmitted by described optical fiber is divided into two ways of optical signals through described channel-splitting filter, outputs to described two receiving terminal optical-electrical converters again.
Video data transceiver of the present invention directly is sent to far-end with vision signal by optical fiber, but high-speed and high-efficiency ground transmits real time data, and the transmission wire rod that is used is gently little, takes up an area of and lacks, and be easy to lay, keep in repair and detect.All adopted software control in receiving system and the dispensing device,, can adapt to the different demands of various application, the restriction of existing deficiency and frequency range aspect when having reduced a large amount of phase-locked loops control of former employing by changing software.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic diagram that vision signal transmits in the prior art;
Fig. 2 is the annexation schematic diagram of transmitting terminal and receiving terminal video data converter among Fig. 1;
Fig. 3 is the fundamental diagram of video data transceiver of the present invention;
Fig. 4 is the schematic diagram of video data transceiver in a preferred embodiment of the invention.
Embodiment
As shown in Figure 3, video data transceiver of the present invention is divided into dispensing device and receiving system two parts, after wherein dispensing device 28 tunnel vision signals that directly will send main frame are handled, synthesize 1 road light signal and be sent to the receiving system of far-end through optical fiber, restore 28 tunnel vision signals by it again and output to display device, to realize the transmission and the demonstration of remote video signal.Compared to Figure 1, grid line and on-the-spot main frame have wherein been saved.
Be illustrated in figure 4 as the schematic diagram of a preferred embodiment of the invention, wherein top is divided into dispensing device, and the bottom is divided into receiving system.As seen, this video data transceiver applies to parallel-to- serial converter 21,22 and deserializer 81,82, and utilizes lock-out pulse generator 1 to produce lock-out pulse at transmitting terminal, adopts phase alignment processor 9 to carry out the phase alignment modulation at receiving terminal.
Wherein, the vision signal of input dispensing device is included as 28 road TTL (transistor-transistor logic) level signal, can certainly be CMOS (complementary metal oxide semiconductors (CMOS)) level signal or PECL (ECL of positive) level signal, all these signals just have difference on level height and threshold voltage.Because in the existing parallel-to-serial converter of existing market, the low-frequency input signal frequency range relative narrower of parallel-to-serial converter more than 32 tunnel of part, the frequency range that can not be suitable for existing video 20～65M, just not can be used for more than 28 the tunnel and and string conversion reach the above product of 2G (65M*28 is about 2G), so adopted two 16 parallel-to-serial converter in the video data transceiver of present embodiment, adopted HDMP-1022 in the present embodiment; Adopted two 16 deserializer accordingly, adopted HDMP-1024 in the present embodiment, can use in the frequency range of 7.5～75M, its output signal frequency width is 120～1200M.
In 28 tunnel vision signals, wherein have one the tunnel to be clock signal, this clock signal input synchronised clock generator 1 outputs to two parallel-to- serial converters 21,22 respectively again to produce synchronization pulse, makes both work synchronous.Remaining 27 road signal is divided into two-way and imports above-mentioned two parallel-to-serial converters respectively, and for example desirable 15 tunnel input parallel-to-serial converters 21,12 tunnel input parallel-to-serial converters 22 in addition can certainly adopt other method of salary distribution.
In dispensing device, this 28 tunnel level signal is after two parallel-to- serial converters 21,22 are treated to the two-way serial signal, output to two transmitting terminal optical- electrical converters 31,32 respectively and convert the light signal of two groups of different frequencies to, be merged into one road light signal through wave multiplexer 4 again, be transferred to the far-end receiving system by simple optical fiber 5 at last.
In receiving system, by channel-splitting filter 6 the light signal decomposition-reduction that optical fiber transmits is gone out original two ways of optical signals, convert two ways of optical signals to two-way serial level signal by receiving terminal optical- electrical converter 71,72 then, go out 28 tunnel original vision signals by deserializer 81,82 decomposition-reductions again.Corresponding to the distribution condition of above-mentioned transmitting terminal, wherein deserializer 81 outputs 1 tunnel clock signal adds 15 road other signals, and deserializer 82 outputs 1 tunnel clock signal adds 12 road other signals.If change the method for salary distribution in the dispensing device, the then also corresponding change of the corresponding relation in the receiving system, in a word, in the dispensing device in the work of each device and the receiving system work of each device corresponding one by one.
For two deserializers, 81,82 level signals of being exported synchronously being passed to display device, also must carry out phase alignment and handle through phase alignment processor 9.Be equivalent to dispensing device and be an encoder and receiving system is a decoder, the mode of encoding and decoding is corresponding, and so vision signal has been sent to the other end with regard to complete from an end.
Wherein, lock-out pulse generator 1 can adopt CPLD (complex programmable logic array), realizes Synchronization Control by writing corresponding Control Software.Phase alignment processor 9 can adopt FPGA (field programmable gate array), realizes the phase alignment processing by writing corresponding Control Software.Transmitting terminal optical- electrical converter 31,32 and receiving terminal optical- electrical converter 71,72 are made up of LD (laser diode) and associated driver circuitry, adopt MAX3866 in the present embodiment.Wave multiplexer 4 and channel-splitting filter 6 all are WDM (wavelength division multiplexers), adopt BWDM-HP3511B in the present embodiment.
In the video data transceiver of the present invention, by changing optical-electrical converter or changing laser and drive circuit, can utilize monomode fiber directly transmitting range to be brought up to more than 100 kilometers, be not only the preferred plan that the indoor and outdoor large scale display directly utilizes the computer transmission, the strong instrument of transmission picture signal and high-frequency data on some large ships, the aircraft also is the direct approach of remote monitoring, communication, video telephone especially.This transducer can directly be expanded and utilize 4 unnecessary ports, can be used for other and surveys usefulness as ultrasonic wave, infrared ray etc., thereby can well used aspect the search of seabed.Along with science and technology and growth in the living standard, increasing user will use in the home security monitoring.With
Video data transceiver of the present invention utilizes the Optical Fiber Transmission vision signal, has both improved the reliability of transmission, has reduced volume and weight again, is a renewal of cable transmission mode.Its efficiency of transmission height, synchronism is good, and it is slow to have changed transmission speed Network Based in the past fully, and data are easily lost, and interference resistance is poor, and realtime graphic transmits the distinct disadvantage of difference.
The present invention is not limited to the foregoing description, also can cancel wherein wave multiplexer 4 and channel-splitting filter 6, by two piece optical fiber be connected between dispensing device and the receiving system this moment, the output of each transmitting terminal optical-electrical converter is connected to the input of receiving terminal optical-electrical converter by an optical fiber, parallel multi-channel video signal is divided into two parts through described parallel-to-serial converter and transmitting terminal optical-electrical converter and converts two ways of optical signals to, is sent to described receiving system through an optical fiber respectively.
In addition, can also adopt the parallel-to-serial converter of other type to add corresponding optical-electrical converter, with vision signal be divided into three the road or more multichannel transmit, parallel-to-serial converter in the receiving system and optical-electrical converter are corresponding one by one with the corresponding device of dispensing device; Simultaneously, transmission optical fiber wherein can be three or many; Certainly, also can only transmit by adopting wave multiplexer and channel-splitting filter with an optical fiber.From feasibility and economy, the load mode that above-mentioned two-way parallel-to-serial converter adds simple optical fiber is most preferred a kind of mode.
Claims (5)
1, a kind of video data transceiver comprises dispensing device and receiving system, it is characterized in that, described dispensing device sends to described receiving system by optical fiber with vision signal;
Described dispensing device comprise be used for parallel level signal be converted to the serial level signal parallel-to-serial converter, be used for described serial level signal is converted to the transmitting terminal optical-electrical converter of light signal, and be used to described parallel-to-serial converter that the lock-out pulse generator of synchronization pulse is provided;
Described receiving system comprises that the light signal that is used for receiving is converted to the receiving terminal optical-electrical converter of serial level signal, is used for the serial level signal being converted to the deserializer of parallel level signal and being used for the parallel level signal that restores is carried out the phase alignment processor that phase alignment is handled.
2, video data transceiver according to claim 1 is characterized in that,
In described dispensing device, be provided with two parallel-to-serial converters and two transmitting terminal optical-electrical converters, the output of each parallel-to-serial converter is connected to the input of a transmitting terminal optical-electrical converter, and the synchronization pulse that described lock-out pulse generator produces outputs to described two parallel-to-serial converters respectively makes its synchronous working;
In described receiving system, be provided with two deserializers and two receiving terminal optical-electrical converters, the output of each receiving terminal optical-electrical converter is connected to the input of a deserializer, described phase alignment processor be connected described two deserializers output, be used for that the two-part parallel level signal that restores is carried out phase alignment and handle.
3, video data transceiver according to claim 2, it is characterized in that, be connected by two optical fiber between described dispensing device and the receiving system, the output of each transmitting terminal optical-electrical converter is connected to the input of receiving terminal optical-electrical converter by an optical fiber, parallel multi-channel video signal is divided into two parts through described parallel-to-serial converter and transmitting terminal optical-electrical converter and converts two ways of optical signals to, is sent to described receiving system through an optical fiber respectively.
4, video data transceiver according to claim 2 is characterized in that, is connected by simple optical fiber between described dispensing device and the receiving system;
In described dispensing device, also comprise an input and the wave multiplexer that the output of described two transmitting terminal optical-electrical converters is connected, output is connected with described optical fiber; Parallel multi-channel video signal is divided into two parts through described parallel-to-serial converter and transmitting terminal optical-electrical converter and converts two ways of optical signals to, is combined into one road light signal and is sent to described receiving system through described optical fiber through described wave multiplexer again;
In described receiving system, also comprise the channel-splitting filter that an input is connected with described optical fiber, output is connected with the input of described two receiving terminal optical-electrical converters, the road light signal that is transmitted by described optical fiber is divided into two ways of optical signals through described channel-splitting filter, after described receiving terminal optical-electrical converter, deserializer and phase alignment processor reduction go out original parallel duplex vision signal, output to corresponding display equipment more again.
5, according to each described video data transceiver among the claim 2-4, it is characterized in that, described parallel vision signal is 28 tunnel parallel level signals, and described two parallel-to-serial converters are 16 parallel-to-serial converters, and described two deserializers are 16 bit strings and transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021345910A CN1477798A (en) | 2002-08-20 | 2002-08-20 | Video data transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021345910A CN1477798A (en) | 2002-08-20 | 2002-08-20 | Video data transceiver |
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| CN1477798A true CN1477798A (en) | 2004-02-25 |
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| CNA021345910A Pending CN1477798A (en) | 2002-08-20 | 2002-08-20 | Video data transceiver |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100490517C (en) * | 2006-01-12 | 2009-05-20 | 中国科学院长春光学精密机械与物理研究所 | Device for implementing high speed carmera image data transmission using optical fibre link |
| CN104660989A (en) * | 2015-01-28 | 2015-05-27 | 中国科学院光电技术研究所 | Optical fiber-to-full configuration type Camera link real-time image optical transceiver based on FPGA (Field Programmable Gate Array) |
| CN103686170B (en) * | 2013-12-23 | 2017-02-01 | 广东威创视讯科技股份有限公司 | Short-distance multi-channel video transmission method and device |
| CN116192263A (en) * | 2023-04-25 | 2023-05-30 | 济南莱兴信息科技有限公司 | Synchronous two-way optical fiber modem and aviation control signal transmission system and method |
-
2002
- 2002-08-20 CN CNA021345910A patent/CN1477798A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100490517C (en) * | 2006-01-12 | 2009-05-20 | 中国科学院长春光学精密机械与物理研究所 | Device for implementing high speed carmera image data transmission using optical fibre link |
| CN103686170B (en) * | 2013-12-23 | 2017-02-01 | 广东威创视讯科技股份有限公司 | Short-distance multi-channel video transmission method and device |
| CN104660989A (en) * | 2015-01-28 | 2015-05-27 | 中国科学院光电技术研究所 | Optical fiber-to-full configuration type Camera link real-time image optical transceiver based on FPGA (Field Programmable Gate Array) |
| CN104660989B (en) * | 2015-01-28 | 2018-02-13 | 中国科学院光电技术研究所 | A kind of optical fiber based on FPGA turns full layout type Camera link realtime graphic optical transmitter and receivers |
| CN116192263A (en) * | 2023-04-25 | 2023-05-30 | 济南莱兴信息科技有限公司 | Synchronous two-way optical fiber modem and aviation control signal transmission system and method |
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