CN104363433A

CN104363433A - Multi-channel optical transceiver without external distributor

Info

Publication number: CN104363433A
Application number: CN201410644090.8A
Authority: CN
Inventors: 王家祥; 杨国文
Original assignee: Transcend Communication Inc
Current assignee: Transcend Communication Inc
Priority date: 2014-11-14
Filing date: 2014-11-14
Publication date: 2015-02-18
Anticipated expiration: 2034-11-14
Also published as: CN104363433B

Abstract

The invention discloses a multi-channel optical transceiver without an external distributor. The optical transceiver comprises an optical transceiver sending end and a plurality of optical transceiver receiving ends. The sending end is connected with the receiving ends through a plurality of optical fibers with the same number of the receiving ends. Each optical fiber corresponds to a receiving end. FPGA chips are used at the sending end and the receiving ends. According to the multi-channel optical transceiver, a front end system of a multi-channel optical transceiver system is greatly simplified, and video signal high-quality transmission and system operation stability are guaranteed.

Description

Multi-path optical transmitter and receiver without external distributor

Technical Field

The present invention relates to a multi-channel optical transceiver, and more particularly, to a multi-channel optical transceiver without an external distributor.

Background

At present, when multimedia data such as audio and video or control data are transmitted in a long distance, most multimedia data are transmitted through an optical transceiver; in the application occasions of information distribution and the like, the requirement of one-transmission-multiple-reception often exists, but the currently adopted video transmission system mainly inputs video signals into a video distributor firstly and then enters a plurality of video optical transceivers for transmission, the specific structure of the video transmission system is shown in fig. 1, and the scheme mainly has the following defects: 1) due to the fact that a front-end system is too complex, N +1 devices and N video lines are needed for sending N paths of videos; 2) the cost of the optical transceiver is high, and the system cost is greatly increased by adopting a plurality of optical transceivers for transmission; 3) the system has more fault points and is unstable due to more equipment; 4) if the video is analog, the video distributor will cause attenuation and distortion of the video signal, which affects the video transmission quality.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the multi-channel optical transmitter and receiver without an external distributor, which not only greatly simplifies the front-end system and reduces the system cost, but also greatly improves the running stability of the system.

In order to achieve the above object, the present invention provides a multi-channel optical transceiver without an external distributor, which includes an optical transceiver transmitting end and a plurality of optical transceiver receiving ends, wherein the transmitting end is connected to the receiving ends through a plurality of optical fibers with the same number as the receiving ends, and each optical fiber corresponds to one receiving end.

Further, the optical transceiver sending end comprises a video input interface, a video decoding chip, an FPGA, a DDR, an optical module and a PLC optical splitter; wherein,

the video input interface is used for receiving a video input signal and sending the received video input signal to the video decoding chip;

the video decoding chip is used for decoding the received video input signal and sending the decoded video input signal to the FPGA;

the FPGA is used for writing the decoded video input signal into the DDR for caching, converting the decoded video input signal into a high-speed serial signal when the video input signal needs to be sent to a receiving end, and sending the high-speed serial signal to the optical module;

the optical module is used for receiving the high-speed serial signal, converting the high-speed serial signal into an optical signal and then sending the optical signal to the PLC optical splitter;

and the PLC optical splitter is used for receiving the optical signals, copying the optical signals and outputting N paths of same optical signals.

Further, the receiving end of the optical transceiver comprises an optical module, an FPGA, a DDR, a video coding chip and a video output interface; wherein,

the optical module is used for receiving an optical signal sent by the sending end of the optical transceiver, converting the optical signal into a high-speed serial signal and then sending the high-speed serial signal to the FPGA;

the FPGA deserializes the received high-speed serial signals, writes the deserialized signals into the DDR for caching, reads out the cached data in the DDR when the video needs to be sent to a display terminal for display, and sends the data to the video coding chip;

the video coding chip is used for receiving data sent by the FPGA, converting the received data into a video output signal and sending the video output signal to the display terminal for display through the video output interface.

Further, the video input signal is any one of HDMI, DVI, VGA, SDI, YPbPr and Displayport.

Further, the video input signal is directly sent to the video decoding chip through the video input interface without being compressed.

According to the invention, the FPGA is utilized to save a video distributor and a middle video cable, the number of the sending ends is reduced to 1, so that a front-end system is greatly simplified, the system cost is greatly reduced along with the reduction of the number of the devices, and the system stability is also greatly improved; when the video signal is analog signal, the invention reduces the attenuation and distortion in the signal transmission process and ensures the quality of video transmission because the video is not compressed in the transmission process and the video signal is only subjected to one-time A/D conversion.

Drawings

Fig. 1 is a schematic structural diagram of a conventional multi-channel optical transceiver;

fig. 2 is a schematic structural diagram of a multi-channel optical transceiver according to the present invention;

fig. 3 is a schematic structural diagram of a transmitting end of the multi-path optical transceiver according to the present invention;

fig. 4 is a schematic structural diagram of a receiving end of the multi-channel optical transceiver of the present invention.

Detailed Description

The invention is described below with reference to the accompanying drawings.

As shown in fig. 2, the multi-path optical transceiver of the present invention includes an optical transceiver transmitting end and an optical transceiver receiving end, wherein the optical transceiver receiving end can be provided with a plurality of optical transceivers according to actual needs, the transmitting end can be provided with output ports with the same number as the receiving ends according to needs, and each port is connected to one receiving end through an optical fiber; the receiving end displays the video information to be displayed through the display terminal through the video transmission line.

As shown in fig. 3, the transmitting end of the optical transceiver in the present invention includes a video input interface, a video decoding chip, an FPGA, a DDR, an optical module, and a PLC optical splitter; the video input interface is used for receiving a video input signal and sending the received video input signal to the video decoding chip; the video decoding chip is used for decoding the received video input signal and sending the decoded video input signal to the FPGA; the FPGA is used for writing the decoded video input signal into the DDR for caching, converting the decoded video input signal into a high-speed serial signal when the video input signal needs to be sent to a receiving end, and sending the high-speed serial signal to the optical module; the optical module is used for receiving the high-speed serial signal, converting the high-speed serial signal into an optical signal and then sending the optical signal to the PLC optical splitter; and the PLC optical splitter is used for receiving the optical signals, copying the optical signals and outputting N paths of same optical signals.

The sending end of the optical transceiver saves a video distributor and a video cable in the middle, and one sending end can be provided with a plurality of output interfaces, so that the number of the sending ends is reduced to one, the front-end system is greatly simplified, the cost of the system is greatly reduced due to the reduction of the number of the equipment, and the stability is also obviously improved; the sending end of the invention only goes through the A/D conversion process once when sending the video information, but in the optical transmitter system used at present, before the A/D conversion, the video distribution and cable transmission processes are added, and the attenuation and distortion of the analog video signal can be increased by the processes.

As shown in fig. 4, the receiving end of the optical transceiver of the present invention includes an optical module, an FPGA, a DDR, a video encoding chip, and a video output interface; the optical module is used for receiving an optical signal sent by a sending end of the optical transceiver, converting the received optical signal into a high-speed serial signal and then sending the high-speed serial signal to the FPGA; the FPGA deserializes the received high-speed serial signals, writes the deserialized signals into the DDR for caching, reads out the cached data in the DDR when the video needs to be sent to a display terminal for display, and sends the data to a video coding chip; the video coding chip is used for receiving data sent by the FPGA, converting the received data into a video output signal and sending the video output signal to the display terminal for displaying through the video output interface.

The video signals that can be transmitted by the multi-channel optical transceiver of the present invention include, but are not limited to: HDMI, DVI, VGA, SDI, YPbPr, Displayport; the video signal is not compressed in the transmission process, so that the quality of video transmission is further ensured.

The foregoing is a preferred embodiment of the present invention, and it should be noted that it would be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are also considered to be within the scope of the invention.

Claims

1. The multichannel optical transmitter and receiver is characterized by comprising an optical transmitter and receiver sending end and a plurality of optical transmitter and receiver receiving ends, wherein the sending end is connected with the receiving ends through a plurality of optical fibers with the same number as the receiving ends, and each optical fiber corresponds to one receiving end.

2. The optical transceiver of claim 1, wherein the optical transceiver transmitting end comprises a video input interface, a video decoding chip, an FPGA, a DDR, an optical module, and a PLC optical splitter; wherein,

3. The optical transceiver of claim 1, wherein the optical transceiver receiving end comprises an optical module, an FPGA, a DDR, a video coding chip, and a video output interface; wherein,

4. The optical transceiver of claim 2, wherein the video input signal is any one of HDMI, DVI, VGA, SDI, YPbPr, Displayport.

5. The optical transceiver of claim 2, wherein the video input signal is sent to the video decoding chip directly through the video input interface without compression.