CN201409205Y

CN201409205Y - Video/audio-monitoring standard definition optical transceiver

Info

Publication number: CN201409205Y
Application number: CN2009200042066U
Authority: CN
Inventors: （请求不公开姓名）
Original assignee: BEIJING ZHENGRONG COMMUNICATION NETWORKS TECHNOLOGY Co Ltd
Current assignee: Beijing Zhengrong communication networks Polytron Technologies Inc
Priority date: 2009-01-20
Filing date: 2009-01-20
Publication date: 2010-02-17
Anticipated expiration: 2019-01-20

Abstract

The utility model relates to a video/audio-monitoring standard definition optical transceiver, which belongs to a transmission device for remotely transmitting high-quality images and monitoring audiovia an optic fiber. The optical transceiver can transmit eight channels of video and sixteen channels of audio by using only one optic fiber; in the process of transmission, the optical transceiver also provides a real-time audio state and intensity displaying function (a pure color audio light column) and a real-time video monitoring function (a 1.8 inch LCD display screen); and the optical transceiver is divided into a transmitter and a receiver. The whole set of optical transceiver is highly integrated and has a compact structure, the connected parts adopt simple socket connectors, and theuse and maintenance are convenient. Power consumption is low, distortion is little, and the bandwidth can reach 7MHz. The signal level is 1Vp-p, CL crosstalk is less than 0.4 percent, DG is less than2 percent, DP is less than 2 percent, the SNR weight is larger than 65db, and the full-color PAL system is supported. The anti-interference property is good, and the maximum transmission distance canreach more than 60Km.

Description

Look Voice Surveillance SD optical transceiver

Technical field

The novel a kind of remote Optical Fiber Transmission high grade picture monitoring numeral of the true usefulness of this product is looked, the audio frequency optical transceiver.

Background technology

At present, market is when Optical Fiber Transmission, can not show timely that detection is looked, audio case, making can not be in the performance of line justification system in system's use and the engineering construction, and the definite and division of fault, this utility model well makes fault and performance be distinguished, and for from now on checking system and system use good differentiation is arranged.

Summary of the invention

The purpose of the practical innovation of this type is can reach farthest at a distance the transmission of (60Km) multichannel voice frequency and video, and has realized the effect of real-time monitoring, and is quick for the client has built convenience, the timesaving bridge.

A complete set of equipment is made of transmitter and receiver, and transmitter and receiver all are grouped into by front end display part and data transfer part. and in the middle of transceiver, only use an optical fiber, just can transmit eight tunnel vision signals, ten six tunnel audio signals.

The front end display part comprises audio frequency indicating section and video display part. tcp data segment comprises that transmitter (two of master) receiver (two of master) mainboard receives optical module (receiver) by sending optical module (transmitter); Staticizer; Programmable gate array; The audio frequency and video assembly of transmitter (audio frequency and video analog to digital converter); Receiver audio frequency and video assembly (audio frequency and video digital to analog converter) constitutes, and other is the same with mainboard except that not having optical module for slave plate.

The CVBS signal decomposites the Voice ﹠ Video digital signal respectively through the audio frequency and video analog to digital converter of transmitter and gives the serial signal that the programmable logic device assembly obtains convert parallel signal to by sending optical module output to staticizer after inter-process; Receiver then be receive optical module serial signal through staticizer form parallel signal to programmable logic device extract respectively the audio frequency and video digital signal through the audio frequency and video digital-to-analogue conversion again video and audio signal reduced the audio-video signal of output high-fidelity.

A complete set of equipment Highgrade integration, compact conformation, simple connector is used in the coupling part, and operation and maintenance is all more convenient.It is low in energy consumption, and distortion is little, and bandwidth can reach 7MHz. signal level 1Vp-p, and CL crosstalks and is lower than 0.4%, DG＜2%, DP＜2%, the full-color support Phase Alternation Line system of SNR weighting＞65db.Good in anti-interference performance.

Description of drawings

Below in conjunction with accompanying drawing and enforcement the utility model monitor is further specified;

Fig. 1 is the structural representation of optical transceiver

Fig. 2 is the theory diagram of optical transceiver transmitter;

Fig. 3 is the theory diagram of optical transceiver receiver;

Fig. 4 is the theory diagram of optical transceiver front end display part;

Fig. 5, Fig. 6, Fig. 7, Fig. 8 are the circuit diagrams of Fig. 2 optical transmitter embodiment;

Fig. 9, Figure 10, Figure 11, Figure 12 are the circuit diagrams of Fig. 3 optical transmitter embodiment

Figure 13 is that it uses connection diagram

Embodiment

Discuss in detail below in conjunction with accompanying drawing:

Fig. 1 is the structural representation of optical transceiver:

The transmitter of this optical transceiver and the structural representation of receiver comprise that video shows, audio frequency and video indication, video control section shown in figure one.

Fig. 2 is the theory diagram of optical transceiver transmitter:

The CVBS signal comprises that through the one-level amplifier of transmitter video (1) and audio frequency (2) amplify, and amplifies the back and decomposites the Voice ﹠ Video digital signal by video A/D converter (3) and audio frequency analog to digital converter (4) and give the programmable logic device assembly serial signal that (5) obtain convert parallel signal to for staticizer (6) to transmit receiver by sending optical module (7) after inter-process.

Fig. 3 is the theory diagram of optical transceiver receiver:

Receiver then is receiving optical module (7) serial signal to be passed to programmable logic device (5) after treatment through staticizer (6) conversion formation parallel signal, extract video and audio digital signals respectively and obtain video and audio signal after through the conversion of video dac (8) and audio digital to analog converter (9) and deliver to the video amplifier (1) and audio frequency amplifier (2) and amplify and reduced, export the audio-video signal of high-fidelity.

Fig. 4 is the theory diagram of optical transceiver front end display part:

The mainboard of transmitter and receiver is given FPGA (programmable logic device) (10) digital signal of sixteen bit after treatment respectively, decomposites index signal (video and audio frequency) and digital video signal.Index signal is the running status that LED (11) represents video, and ten pure glory posts (12) are represented the running status of audio frequency, and vision signal is presented at front end to outputting video signal after the digital to analog converter conversion.

Fig. 5, Fig. 6, Fig. 7, Fig. 8 are the circuit diagrams of Fig. 2 optical transmitter embodiment:

With one road video and audio frequency is the course of work that the example explanation sends optical transceiver, the CVBS signal is exported for the signal after the 2 pin input of signal amplifier U101 is amplified by 19 pin, be converted to digital signal for video modulus commentaries on classics device U1 and directly pass to U301 (programmable logic device) from 5 pin of U1 to 12 pin output A0-A7 eight-digit number word signal; Meanwhile audio signal is exported to the digital signal that audio frequency analog to digital converter U102 obtains by 6 pin for signal after the 3 pin input of audio frequency amplifier U112 is amplified and is also passed to U301 after conversion, in U301, video and audio signal done after the unified processing 16 parallel-by-bit digital signals, give staticizer U701, parallel signal is converted to pass to behind the serial signal send optical module and send to receiver.

Fig. 9, Figure 10, Figure 11, Figure 12 are the circuit diagrams of Fig. 3 optical transmitter embodiment:

Same video and audio frequency with a tunnel is the course of work that the example explanation receives optical transceiver, reception optical module U902 receives signal and send U181 to become 16 parallel signal to give U901 (programmable logic device) through inter-process conversion of signals, decompose to come out the digital signal of Voice ﹠ Video and give video digital-to-analogue commentaries on classics device U12 and audio digital to analog converter U105 respectively, the video and audio signal that has obtained simulation after the process conversion is through amplifier U15 (video amplifier) U101 audio frequency amplifier, and the video and audio signal after the amplification is reduced.

The operation principle of slave plate is the same with the operation principle of mainboard.

Figure 13 is that it uses connection diagram:

The coaxial cable that with impedance is 75 ohm is connected the video port of optical transceiver with the video port of video input-output equipment (video camera, monitor, video tape recorder, video distributor, matrix etc.).

Claims

1. look Voice Surveillance SD optical transceiver, mainly comprise optical sender and optical receiver, it is characterized in that: optical transmitter comprises that the CVBS signal comprises that through the one-level amplifier of transmitter video (1) and audio frequency (2) amplify, and amplifies the back and decomposites the Voice ﹠ Video digital signal by video A/D converter (3) and audio frequency analog to digital converter (4) and give the programmable logic device assembly serial signal that (5) obtain convert parallel signal to for staticizer (6) to transmit receiver by sending optical module (7) after inter-process; Optical receiver (7) forms parallel signal to serial signal through staticizer (6) conversion and passes to programmable logic device (5) after treatment, extract video and audio digital signals respectively and obtain video and audio signal after through the conversion of video dac (8) and audio digital to analog converter (9) and deliver to the video amplifier (1) and audio frequency amplifier (2) and amplify and reduced, export the audio-video signal of high-fidelity.

2. the Voice Surveillance SD optical transceiver of looking according to claim 1, it is characterized in that: described optical sender, optical receiver mainly comprise front end display part and tcp data segment, and tcp data segment is made up of transmitter circuit plate (two of mainboard and slave plates) and circuit board receiver (two of mainboard and slave plates).Annotate: other is the same with mainboard except that not having optical module on the slave plate, because all shared optical module of master transmits data.

3. the Voice Surveillance SD optical transceiver of looking according to claim 1, it is characterized in that: the mainboard of transmitter and receiver is given FPGA (programmable logic device) (10) digital signal of sixteen bit after treatment respectively, decomposites index signal (video and audio frequency) and digital video signal; Index signal is the running status that LED (11) represents video, and ten pure glory posts (12) are represented the running status of audio frequency, and vision signal is presented at front end to outputting video signal after the digital to analog converter conversion.

4. the Voice Surveillance SD optical transceiver of looking according to claim 1, it is characterized in that: described optical sender, optical receiver are independently modular construction, and the light signal of optical sender output is linked to the input of optical receiver by an optical cable.

5. the Voice Surveillance SD optical transceiver of looking according to claim 1 is characterized in that: a complete set of equipment Highgrade integration, compact conformation, simple connector is used in the coupling part, and operation and maintenance is all more convenient, and it is low in energy consumption, distortion is little, bandwidth can reach 7MHz, and signal level 1Vp-p, CL crosstalk and be lower than 0.4%, DG＜2%, DP＜2%, the full-color support Phase Alternation Line system of SNR weighting＞65db, good in anti-interference performance.