CN203015035U - HD-SDI optical transmitter and receiver - Google Patents
HD-SDI optical transmitter and receiver Download PDFInfo
- Publication number
- CN203015035U CN203015035U CN 201220674013 CN201220674013U CN203015035U CN 203015035 U CN203015035 U CN 203015035U CN 201220674013 CN201220674013 CN 201220674013 CN 201220674013 U CN201220674013 U CN 201220674013U CN 203015035 U CN203015035 U CN 203015035U
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- China
- Prior art keywords
- receiver
- clock recovery
- sdi
- signal
- recovery circuit
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Abstract
The utility model provides an HD-SDI optical transmitter and receiver. A structure of the HD-SDI optical transmitter and receiver is characterized by comprising an emitter and a receiver, wherein the emitter comprises a cable equalizer, a first clock recovery circuit and an electro-light converter, the first clock recovery circuit is in signal electrical connection with the cable equalizer, the electro-light converter is in signal electrical connection with the first clock recovery circuit, the receiver comprises a light-electric converter, a second clock recovery circuit and a cable driver, the second clock recovery circuit is in signal electrical connection with the light-electric converter, and the cable driver is in signal electrical connection with the second clock recovery circuit. The HD-SDI optical transmitter and receiver has advantages of stable performance, intelligible image quality, high stability, relatively low cost and strong applicability.
Description
Technical field
The utility model relates to optical transmission device, has to relate to a kind of HD-SDI optical transceiver.
Background technology
Optical transceiver is a kind of terminal equipment of optical signal transmission.The development of attachment techniques in recent years, optical transceiver is digitized direction development to high Qinghua.The HD-SDI optical transceiver is namely the optical transceiver of high definition-digital serial interface.The high-definition digital video optical transceiver adopts non-compressed word HD video and high-speed figure optical fiber transmission technique, the HD-SDI digital signal of 1.485Gbps is converted to transmits the 1-20 kilometer on optical fiber after light signal and revert to again the signal of telecommunication, be applicable to SDI video monitoring and long-distance video collection.Present optical transceiver on the market, quality is uneven, more exists to dodge the some shortcomings such as screen, blank screen, transmission delay and smear in the high-definition image transmitting procedure.
The utility model content
The purpose of this utility model is: overcome the deficiencies in the prior art, provide that a kind of cost is lower, transmission quality good, the HD-SDI optical transceiver of the real-time high definition of real realization.
The technical solution of the utility model is: HD-SDI optical transceiver of the present utility model, and its design feature is: comprise transmitter and receiver; Described transmitter comprises cable equalizer, the first clock recovery circuitry and electrical to optical converter; The first clock recovery circuitry is electrically connected to the cable equalizer signal; Electrical to optical converter is electrically connected to the first clock recovery circuitry signal; Receiver comprises electro-optic detector, second clock restore circuit and cable drive; The second clock restore circuit is electrically connected to the electro-optic detector signal; Cable drive is electrically connected to second clock restore circuit signal.
The utlity model has positive effect: the stable performance of (1) HD-SDI optical transceiver of the present utility model, image quality are clear, and stability is high.(2) cost is lower, and suitable application is strong.
Description of drawings
Fig. 1 is electric theory diagram of the present utility model.
Reference numeral in above-mentioned accompanying drawing is as follows:
Transmitter 1, cable equalizer 11, the first clock recovery circuitrys 12, electrical to optical converter 13,
Receiver 2, electro-optic detector 21, second clock restore circuit 22, cable drive 23.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
(embodiment 1)
See Fig. 1, the HD-SDI optical transceiver of the present embodiment mainly is comprised of transmitter 1 and receiver 2.
Transmitter 1 mainly is comprised of cable equalizer 11, the first clock recovery circuitry 12 and electrical to optical converter 13.The first clock recovery circuitry 12 is electrically connected to cable equalizer 11 signals; Electrical to optical converter 13 is electrically connected to the first clock recovery circuitry 12 signals.
Receiver 2 mainly is comprised of electro-optic detector 21, second clock restore circuit 22 and cable drive 23.Second clock restore circuit 22 is electrically connected to electro-optic detector 21 signals; Cable drive 23 is electrically connected to second clock restore circuit 22 signals.
the HD-SDI optical transceiver of the present embodiment is when work, after cable equalizer 11 inputs of sdi signal via transmitter 1, carry out equilibrium treatment by 11 pairs of sdi signals of cable equalizer, carry out clock recovery by the first clock recovery circuitry 12 again, the purpose of doing like this is the sdi signal that shaping again decays in coaxial cable, because HD video sdi signal speed is very high, although video source is little to the electric signal transmission distance of optical transceiver, but high-speed electrical signals still might be interfered, therefore, at first sdi signal will pass through equilibrium treatment after entering optical transceiver, sdi signal is become light signal after by laser modulation launch finally by crossing electrical to optical converter 13.
After receiver 2 receives light signal, at first first carry out opto-electronic conversion by electro-optic detector 21, obtain the initial SDI signal of telecommunication, carry out clock recovery by second clock restore circuit 22 again, the shaping signal of telecommunication, carry out again the conversion of impedance through cable drive 23, make sdi signal become the signal of telecommunication that can normally transfer out via coaxial cable, show image by large-screen on the sdi signal after the coaxial cable transfer encoding.
As the execution mode of optimizing, the part technical parameter of the HD-SDI optical transceiver of the present embodiment is as follows:
Optical fiber interface:
Physical form LC/PC
Optical fiber kind single mode/multimode fiber, single fiber or two fibre
Transmission range multimode 0 ~ 1km, single mode 0 ~ 120km
Video interface:
Physical form four fixing feet metal BNC seats
Video input/output 1Vpp peak-to-peak voltage (75 Ω)
Speed range 19.4Mb/S ~ 1.5Gb/s
Signal level 800mV
Overshoot＜10% amplitude
Reflection loss〉15db
Shake＜0.2UI
Data-interface:
Physical form four-core industry terminal
Consensus standard RS-232/RS-422/RS485 is optional
Data format NRZ
Traffic rate＜300Kbps
The operational mode simplex/duplex
The HD-SDI optical transceiver of the present embodiment can provide abundanter image detail, can realize when being applied in video monitoring system that from traditional SD video monitoring system smooth upgrade be high-definition video monitoring system and real-time, standard, high level security, high reliability, realize real real-time high definition.
The HD-SDI optical transceiver stable performance of the present embodiment, image quality are clear, stability is high, in signals transmission without compression, without time-delay, without smear.And be provided with the LED state indication on fuselage, the operating state that can observe intuitively optical transceiver.
Above embodiment is the explanation to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not in the situation that break away from spirit and scope of the present utility model; can also make various conversion and variation and obtain the corresponding technical scheme that is equal to, so all technical schemes that are equal to all should be included into scope of patent protection of the present utility model.
Claims (1)
1. a HD-SDI optical transceiver, is characterized in that: comprise transmitter (1) and receiver (2); Described transmitter (1) comprises cable equalizer (11), the first clock recovery circuitry (12) and electrical to optical converter (13); The first clock recovery circuitry (12) is electrically connected to cable equalizer (11) signal; Electrical to optical converter (13) is electrically connected to the first clock recovery circuitry (12) signal; Receiver (2) comprises electro-optic detector (21), second clock restore circuit (22) and cable drive (23); Second clock restore circuit (22) is electrically connected to electro-optic detector (21) signal; Cable drive (23) is electrically connected to second clock restore circuit (22) signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674013 CN203015035U (en) | 2012-12-10 | 2012-12-10 | HD-SDI optical transmitter and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674013 CN203015035U (en) | 2012-12-10 | 2012-12-10 | HD-SDI optical transmitter and receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203015035U true CN203015035U (en) | 2013-06-19 |
Family
ID=48606590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220674013 Expired - Fee Related CN203015035U (en) | 2012-12-10 | 2012-12-10 | HD-SDI optical transmitter and receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203015035U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104639899A (en) * | 2015-01-30 | 2015-05-20 | 上海电控研究所 | High-definition SDI (Serial Digital Interface) digital video signal optical fiber transparent transmission device |
-
2012
- 2012-12-10 CN CN 201220674013 patent/CN203015035U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104639899A (en) * | 2015-01-30 | 2015-05-20 | 上海电控研究所 | High-definition SDI (Serial Digital Interface) digital video signal optical fiber transparent transmission device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20201210 |