CN202738007U - Optical transmitter and optical receiver - Google Patents

Optical transmitter and optical receiver Download PDF

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Publication number
CN202738007U
CN202738007U CN 201220305571 CN201220305571U CN202738007U CN 202738007 U CN202738007 U CN 202738007U CN 201220305571 CN201220305571 CN 201220305571 CN 201220305571 U CN201220305571 U CN 201220305571U CN 202738007 U CN202738007 U CN 202738007U
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China
Prior art keywords
clock frequency
input
data
reference clock
high speed
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CN 201220305571
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Chinese (zh)
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刘明学
杨强
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CHENGDU VAD DIGITAL SYSTEMS TECHNOLOGY Co Ltd
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CHENGDU VAD DIGITAL SYSTEMS TECHNOLOGY Co Ltd
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Priority to CN 201220305571 priority Critical patent/CN202738007U/en
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Abstract

The utility model discloses an optical transmitter, which comprises a matrix switcher, input equalizers and an optical transmission module, wherein the matrix switcher comprises two input ports, a high speed data selector connected with the two input ports, a clock recovery device respectively connected with the high speed data selector and the optical transmission module, and an output port connected with the clock recovery device; the first input port of the matrix switcher is connected with the main input end via an input equalizer, and the second input port is connected with the backup input end via the other input equalizer; and the input end of the optical transmission module is connected with the output port of the matrix switcher. Thus, the problems that the clock frequency in a phase-lock loop is low due to the ill-conditioned data, one or more scanning lines in the image scanning process are then missing, and the image displayed on a display device is broken are solved.

Description

Light end transmitter and light end receiver
Technical field
The utility model relates to the light transmission field, relates in particular to a kind of light end transmitter and light end receiver.
Background technology
The SDI/HD-SDI/3G-SDI optical transceiver is the port device by the Optical Fiber Transmission digital video signal.Wherein, SDI(Serial Digital Interface, serial digital interface) be a kind of interface that is widely used in professional video editor broadcast world; HD-SDI(High Definition Serial Digital Interface, the high definition serial digital interface), be the main nothing compression HD video 1.485Gbps coffret that professional high definition device adopts; 3G-SDI supports 1080P and more high-resolution coffret.At present, as TV take the photograph, record, the standard digital video interface of volume, broadcast system devices interconnect, under the environment such as relay, studio, SDI/HD-SDI/3G-SDI optical transceiver home and overseas is widely applied at the scene.
Under this background, require the picture quality of transmission to have high definition, if some color has occupied the very most of of picture in the image, can order via the digital picture that digital data system transmits defective appear, for example hang down transition density or the too high situation of direct current ratio, these situations are called " ill data cases ", " ill data cases " can make the clock frequency of the phase-locked loop of receiver reduce, so that can lose one or more scan lines in the image scanning process, fracture appears in the image that causes showing in the display device, affects picture quality.
The utility model content
For the problems referred to above, the utility model provides a kind of light end transmitter and the receiver machine of going window-shopping, reduce with the clock frequency that solves the phase-locked loop that causes because of " ill data cases ", so that can lose one or more scan lines in the image scanning process, the problem of fracture appears in the image that causes showing in the display device.The technical scheme in the invention for solving the technical problem is as follows:
A kind of light end transmitter comprises:
Matrix switcher, input equalizer and light emission module; Wherein,
Described matrix switcher comprises: two input ports; Be connected with described two input ports, select the High Speed Multiplexer of the input port of data; Be connected with described High Speed Multiplexer and described light emission module respectively, gather the clock frequency of described data, clock frequency and the reference clock frequency of described data are compared, and when the clock frequency of described data and reference clock frequency are inconsistent, the clock frequency of described data is returned to the clock recovery device of reference clock frequency; The output port that is connected with described clock recovery device;
The first input end mouth of described matrix switcher is connected with the primary input end by an input equalizer, and the second input port is connected with the backup input by another input equalizer;
The input of described light emission module is connected with the output port of described matrix switcher.
Above-mentioned light end transmitter, preferred, described clock recovery device comprises:
Be connected the voltage controlled oscillator of generating reference clock frequency with described High Speed Multiplexer;
Be connected with described voltage controlled oscillator with described High Speed Multiplexer respectively, detect the clock frequency of described data, the clock frequency of described data is compared with described reference clock frequency, and when the clock frequency of described data and reference clock frequency are inconsistent, send the phase/frequency detector that recovers instruction;
Be connected with described High Speed Multiplexer, described voltage controlled oscillator and described phase/frequency detector respectively, when receiving the recovery instruction, according to described reference clock frequency, the clock frequency of described data is returned to the clock/data recovery device of reference clock frequency;
Clock/the data buffer that is connected with described light emission module with described clock/data recovery device respectively.
Above-mentioned light end transmitter, preferred, also comprise:
Cable driver;
Accordingly, described matrix switcher also comprises:
By described cable driver with encircle out the ring that signal end is connected and go out signal output port.
Above-mentioned light end transmitter, in preferred, the input signal of described primary input end and backup input is any one in sdi signal, HD-SDI signal or the 3G-SDI signal.
A kind of light end receiver comprises:
Matrix switcher, receiving optical signals also is converted to described light signal the Optical Receivers of the signal of telecommunication, cable equalizer and cable driver; Wherein,
Described matrix switcher comprises: two input ports; Be connected with described two input ports, select the High Speed Multiplexer of data-in port; Be connected with described High Speed Multiplexer and described light emission module respectively, gather the clock frequency of described data, clock frequency and the reference clock frequency of described data are compared, and when the clock frequency of described data and reference clock frequency are inconsistent, the clock frequency of described data is returned to the clock recovery device of reference clock frequency; The output port that is connected with described clock recovery device;
An input port of described matrix switcher is connected with the output of described Optical Receivers; Another input port of described matrix switcher is connected to light backup input by described cable equalizer;
The input of described cable driver is connected with the output port of described matrix switcher.
Above-mentioned light end receiver, preferred, described clock recovery device comprises:
Be connected the voltage controlled oscillator of generating reference clock frequency with described High Speed Multiplexer;
Be connected with described voltage controlled oscillator with described High Speed Multiplexer respectively, detect the clock frequency of described data, the clock frequency of described data is compared with described reference clock frequency, and when the clock frequency of described data and reference clock frequency are inconsistent, send the phase/frequency detector that recovers instruction;
Be connected with described High Speed Multiplexer, described voltage controlled oscillator and described phase/frequency detector respectively, when receiving the recovery instruction, according to described reference clock frequency, the clock frequency of described data is returned to the clock/data recovery device of reference clock frequency;
Clock/the data buffer that is connected with described cable driver with described clock/data recovery device respectively.
Above-mentioned light end receiver, preferred, the input signal of described backup input is any one in SDI light signal, HD-SDI light signal or the 3G-SDI light signal.
Matrix switcher in the light end transmitter that the utility model provides and the light end receiver gathers the clock frequency of described data, clock frequency and the reference clock frequency of described data are compared, and when the clock frequency of described data and reference clock frequency are inconsistent, the clock frequency of described data is returned to reference clock frequency, the clock frequency that has solved the phase-locked loop that causes because of " ill data cases " reduces, so that can lose one or more scan lines in the image scanning process, cause the image that shows in the display device problem of fracture to occur, guarantee picture quality.
Description of drawings
In order to be illustrated more clearly in the technical solution of the utility model, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of light end transmitter in the utility model;
Fig. 2 is the structural representation of light end receiver in the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
See also Fig. 1, the structural representation that it shows the application's light end transmitter comprises:
Matrix switcher 11, input equalizer device 12 and light emission module 13, wherein:
Matrix switcher 11 comprises:
Two input ports comprise first input end mouth 111 and the second input port 112; High Speed Multiplexer 113, clock recovery device 114 and output port 115;
First input end mouth 111 is connected with the primary input end by an input equalizer, and the second input port 112 is connected with the backup input by another input equalizer; The input signal of primary input end and backup input is any one in sdi signal, HD-SDI signal or the 3G-SDI signal.
High Speed Multiplexer 113 is connected with described two input ports, be used for selecting the input port of data, concrete, preferentially with the signal of primary input end as signal transmission, namely with the input of primary input end as video data signal, namely, the video data of primary input end input is by first input end mouth 111, behind the first High Speed Multiplexer 113, carry out clock recovery by clock recovery device 114, through output port 115, send after being converted into light signal by light emission module 13, when the video data signal that detects the primary input end when High Speed Multiplexer 113 interrupts, fast signal input channel is switched to the second input port 112, that is, the signal with the backup input transmits as signal transmission.
Clock recovery device 114 is connected with described High Speed Multiplexer 113 and described light emission module 13 respectively, be used for gathering the clock frequency of described data, clock frequency and the reference clock frequency of described data are compared, and when the clock frequency of described data and reference clock frequency are inconsistent, the clock frequency of described data is returned to reference clock frequency;
Output port 15 is connected with described clock recovery device;
Concrete, clock recovery device 114 can comprise:
Voltage controlled oscillator 1141, phase/frequency detector 1142, clock/data recovery device 1143 and clock/data buffer 1144;
Voltage controlled oscillator 1141 is connected with described High Speed Multiplexer 113, is used for the generating reference clock frequency;
Phase/frequency detector 1142 is connected with described voltage controlled oscillator 1141 with described High Speed Multiplexer 113 respectively, detect the clock frequency of described data, the clock frequency of described data is compared with described reference clock frequency, and when the clock frequency of described data and reference clock frequency are inconsistent, send and recover instruction;
Clock/data recovery device 1143 is connected with described High Speed Multiplexer 113, described voltage controlled oscillator 1141 and described phase/frequency detector 1142 respectively, when receiving the recovery instruction, according to described reference clock frequency, the clock frequency of described data is returned to reference clock frequency;
Clock/data buffer 1144 is connected with described output interface 15 with described clock/data recovery device 1143 respectively.
Preferably, in order to optimize above-described embodiment, the light end transmitter that the embodiment of the present application provides also comprises: cable driver 14, accordingly, matrix switcher 11 also comprises: by cable driver 14 with encircle out the ring that signal end is connected and go out signal output port 116, be used for video signal is outputed to this locality, the described signal output port that encircles out can have a plurality of, accordingly, cable driver also can have a plurality of.
Please referring to Fig. 2, the structural representation of the light end receiver that Fig. 2 provides for the embodiment of the present application comprises:
Matrix switcher 21, receiving optical signals also is converted to described light signal the Optical Receivers 22 of the signal of telecommunication, cable equalizer 23 and cable driver 24;
Matrix switcher 21 comprises:
Two input ports comprise first input end mouth 211 and the second input port 212; High Speed Multiplexer 213, clock recovery device 214 and output port 215;
First input end mouth 211 is connected with the output of described Optical Receivers 22, and the input of described Optical Receivers 22 is connected with light input end, and the second input port 212 is connected with light backup input by cable equalizer; The input signal of light input end and light backup input is any one in SDI light signal, HD-SDI light signal or the 3G-SDI light signal.
High Speed Multiplexer 213 is connected with described two input ports, be used for selecting data-in port, concrete, preferentially with the signal of light input end as signal transmission, namely with the input of light input end as video data signal, namely, the video data signal of light input end input is by Optical Receivers 22, behind the first High Speed Multiplexer 213, carry out clock recovery by clock recovery device 214, through output port 215, by cable driver 24 outputs, when High Speed Multiplexer 213 detects the video data signal interruption of light input end, fast signal input channel is switched to the second input port 112, that is the signal that, light is backed up input transmits as signal transmission.
Clock recovery device 214 is connected with described High Speed Multiplexer 213 and described cable driver 24 respectively, be used for gathering the clock frequency of described data, clock frequency and the reference clock frequency of described data are compared, and when the clock frequency of described data and reference clock frequency are inconsistent, the clock frequency of described data is returned to reference clock frequency;
Output port 215 is connected with described clock recovery device 214; Preferably, described matrix switcher 21 can arrange a plurality of output ports, with the output multi-channel video data signal.
Concrete, clock recovery device 214 can comprise:
Voltage controlled oscillator 2141, phase/frequency detector 2142, clock/data recovery device 2143 and clock/data buffer 2144;
Voltage controlled oscillator 2141 is connected with described High Speed Multiplexer 213, is used for the generating reference clock frequency;
Phase/frequency detector 2142 is connected with described voltage controlled oscillator 2141 with described High Speed Multiplexer 213 respectively, detect the clock frequency of described data, the clock frequency of described data is compared with described reference clock frequency, and when the clock frequency of described data and reference clock frequency are inconsistent, send and recover instruction;
Clock/data recovery device 2143 is connected with described High Speed Multiplexer 213, described voltage controlled oscillator 2141 and described phase/frequency detector 2142 respectively, when receiving the recovery instruction, according to described reference clock frequency, the clock frequency of described data is returned to reference clock frequency;
Clock/data buffer 2144 is connected with described output port 215 with described clock/data recovery device 2143 respectively.
Be provided with matrix switcher in the light end transmitter that the embodiment of the present application provides and the light end receiver, by gathering the clock frequency of described data, clock frequency and the reference clock frequency of described data are compared, and when the clock frequency of described data and reference clock frequency are inconsistent, the clock frequency of described data is returned to reference clock frequency, the clock frequency that has solved the phase-locked loop that causes because of " ill data cases " reduces, so that can lose one or more scan lines in the image scanning process, cause the image that shows in the display device problem of fracture to occur, guarantee picture quality.

Claims (7)

1. a light end transmitter is characterized in that, comprising:
Matrix switcher, input equalizer and light emission module; Wherein,
Described matrix switcher comprises: two input ports; Be connected with described two input ports, select the High Speed Multiplexer of the input port of data; Be connected with described High Speed Multiplexer and described light emission module respectively, gather the clock frequency of described data, clock frequency and the reference clock frequency of described data are compared, and when the clock frequency of described data and reference clock frequency are inconsistent, the clock frequency of described data is returned to the clock recovery device of reference clock frequency; The output port that is connected with described clock recovery device;
The first input end mouth of described matrix switcher is connected with the primary input end by an input equalizer, and the second input port is connected with the backup input by another input equalizer;
The input of described light emission module is connected with the output port of described matrix switcher.
2. light end transmitter according to claim 1 is characterized in that, described clock recovery device comprises:
Be connected the voltage controlled oscillator of generating reference clock frequency with described High Speed Multiplexer;
Be connected with described voltage controlled oscillator with described High Speed Multiplexer respectively, detect the clock frequency of described data, the clock frequency of described data is compared with described reference clock frequency, and when the clock frequency of described data and reference clock frequency are inconsistent, send the phase/frequency detector that recovers instruction;
Be connected with described High Speed Multiplexer, described voltage controlled oscillator and described phase/frequency detector respectively, when receiving the recovery instruction, according to described reference clock frequency, the clock frequency of described data is returned to the clock/data recovery device of reference clock frequency;
Clock/the data buffer that is connected with described light emission module with described clock/data recovery device respectively.
3. light end transmitter according to claim 1 is characterized in that, also comprises:
Cable driver;
Accordingly, described matrix switcher also comprises:
By described cable driver with encircle out the ring that signal end is connected and go out signal output port.
4. light end transmitter according to claim 1 is characterized in that, the input signal of described primary input end and backup input is any one in sdi signal, HD-SDI signal or the 3G-SDI signal.
5. a light end receiver is characterized in that, comprising:
Matrix switcher, receiving optical signals also is converted to described light signal the Optical Receivers of the signal of telecommunication, cable equalizer and cable driver; Wherein,
Described matrix switcher comprises: two input ports; Be connected with described two input ports, select the High Speed Multiplexer of data-in port; Be connected with described High Speed Multiplexer and described light emission module respectively, gather the clock frequency of described data, clock frequency and the reference clock frequency of described data are compared, and when the clock frequency of described data and reference clock frequency are inconsistent, the clock frequency of described data is returned to the clock recovery device of reference clock frequency; The output port that is connected with described clock recovery device;
An input port of described matrix switcher is connected with the output of described Optical Receivers; Another input port of described matrix switcher is connected to light backup input by described cable equalizer;
The input of described cable driver is connected with the output port of described matrix switcher.
6. light end receiver according to claim 5 is characterized in that, described clock recovery device comprises:
Be connected the voltage controlled oscillator of generating reference clock frequency with described High Speed Multiplexer;
Be connected with described voltage controlled oscillator with described High Speed Multiplexer respectively, detect the clock frequency of described data, the clock frequency of described data is compared with described reference clock frequency, and when the clock frequency of described data and reference clock frequency are inconsistent, send the phase/frequency detector that recovers instruction;
Be connected with described High Speed Multiplexer, described voltage controlled oscillator and described phase/frequency detector respectively, when receiving the recovery instruction, according to described reference clock frequency, the clock frequency of described data is returned to the clock/data recovery device of reference clock frequency;
Clock/the data buffer that is connected with described cable driver with described clock/data recovery device respectively.
7. light end receiver according to claim 5 is characterized in that, the input signal of described backup input is any one in SDI light signal, HD-SDI light signal or the 3G-SDI light signal.
CN 201220305571 2012-06-27 2012-06-27 Optical transmitter and optical receiver Expired - Fee Related CN202738007U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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
CN105072357A (en) * 2015-08-05 2015-11-18 合肥赛为智能有限公司 Full high definition multimedia signal distributor and distribution method thereof
CN104871456B (en) * 2012-10-29 2017-05-03 菲尼萨公司 Integrated circuits in optical receivers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104871456B (en) * 2012-10-29 2017-05-03 菲尼萨公司 Integrated circuits in optical receivers
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
CN105072357A (en) * 2015-08-05 2015-11-18 合肥赛为智能有限公司 Full high definition multimedia signal distributor and distribution method thereof

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Granted publication date: 20130213

Termination date: 20150627

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