CN106973269A - Optical signal transmission launch terminal based on FPGA - Google Patents
Optical signal transmission launch terminal based on FPGA Download PDFInfo
- Publication number
- CN106973269A CN106973269A CN201710257720.XA CN201710257720A CN106973269A CN 106973269 A CN106973269 A CN 106973269A CN 201710257720 A CN201710257720 A CN 201710257720A CN 106973269 A CN106973269 A CN 106973269A
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- CN
- China
- Prior art keywords
- signal
- video
- fpga
- here
- sending module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
- H04N7/012—Conversion between an interlaced and a progressive signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Graphics (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses the optical signal transmission launch terminal based on FPGA, it is characterized in that, including central processing unit, video sending module, audio sending module, data reception module, go here and there and device, and go here and there device, level shifting circuit and light transmission circuit, the video sending module is used to standard analog video signal being changed into data signal, the data reception module is used for the audio signal and cradle head control signal for receiving reverse transfer, transformation and the transmission and reception of photosignal that the smooth transmission circuit is used between photosignal, the central processing unit uses FPGA, for receiving and handling video sending module, audio sending module, go here and there and the positive signal of device, and will be transmitted after the signal transacting reversely received to data reception module, and go here and there device.This invention simplifies video acquisition structure of the prior art, meeting video processing circuits simply, under the requirement that debugging is convenient, cost is low, further improves the stability of its performance, fit batch production.
Description
Technical field
The present invention relates to the launch terminal of optical signal transmission, and in particular to the optical signal transmission launch terminal based on FPGA.
Background technology
In recent years, security monitoring role in daily production and living is more and more important, greatly to industrial production, height
Fast highway, bank and harbour, it is small to cell monitoring, the road monitoring of people's daily life etc., in these monitors environments, all
It may require that video optical multiplexer.However, optical transmitter and receiver of the prior art is varied, its video acquisition is often to have filtering, sampling
Etc. multiple circuits composition, generally existing cost is higher, its system stablizes poor shortcoming, and its circuit is scattered, and inconvenience carries out product
Detection and debugging.
The content of the invention
The technical problems to be solved by the invention are to use large-scale scattered circuit system, it is therefore intended that provided based on FPGA's
Optical signal transmission launch terminal, using integrated circuit, reduces cost, improves stability, be convenient for Product checking and debugging.
The present invention is achieved through the following technical solutions：
Optical signal transmission launch terminal based on FPGA, including central processing unit, video sending module, audio send mould
Block, data reception module, string and device simultaneously go here and there device, level shifting circuit and light transmission circuit, and the video sending module is used for will
Standard analog video signal is changed into data signal, and the audio sending module is used for collection and the coding of voice signal, described
Data reception module is used for the audio signal and cradle head control signal for receiving reverse transfer, and the smooth transmission circuit is used for optical telecommunications
The transmission and reception of transformation and photosignal between number, the string and device are used for the serial letter for receiving the reception of light transmission circuit
Number, and serial signal is converted into parallel signal, it is described and go here and there the parallel signal that device is used to transmit central processing unit and be converted to
Serial signal, and transmit it to light transmission circuit, the level shifting circuit be used for by and go here and there device and string and the level of device and
The electrical level match of light transmission circuit；The central processing unit uses FPGA, for receiving and handling video sending module, audio hair
Module, string and the positive signal of device are sent, and will be transmitted after the signal transacting reversely received to data reception module and device of going here and there.Depending on
Frequency sending module, audio sending module, data reception module, string and device and device of going here and there be connecteds with central processing unit respectively, go here and there simultaneously device
With and go here and there device and be also connected respectively with level shifting circuit, level shifting circuit is also connected with light transmission circuit.This launch terminal is real
Existing two functions, One function is that the vision signal and audio signal of collection in worksite are passed through FPGA processing, gives light transmitting-receiving electricity
Information transmission is gone out on road, and another function is to receive voice signal and data controlling signal from distal end.Use modularization
Integrated circuit, reached reduction system complexity purpose.
Further, video sending module uses TVP5150AM1 chips.The chip can receive the input of two-way composite signal
Or S-video vision signals, compatible PAL, NTSC, SECM format video signal all the way；Low power consumption；I can be passed through2C buses
Interface Controller brightness, contrast, saturation degree, form and aspect and definition.
Further, audio sending module uses MC14LC5480 chips.The chip, can not only dedicated for speech processes
Voice signal is acquired and pcm encoder, but also can be to pcm encoder the conscientious decoding of data and reduction.
Further, and device is gone here and there using Max9205 chips.The chip can be the LVTTL or LVCOMS of 10 parallel-by-bits electricity
Ordinary mail number is converted to serial high velocity, low pressure differential signal (LVDS signals).When system clock is 16MHz to 40MHz, it can pass
Defeated serial transmission speed is between 160MHz to 400MHz；The chip has internal phaselocked loop, it is not necessary to external PLL device.
Further, simultaneously device uses Max9206 chips to string.The effect of the chip is the high velocity, low pressure that reverse transfer is come
Differential serial digital signal transition is the parallel LVTTL or LVCOMS level signals of low speed.
The present invention compared with prior art, has the following advantages and advantages：This invention simplifies in the prior art
Video acquisition structure, meeting, video processing circuits is simple, under the requirement that debugging is convenient, cost is low, further improves
The stability of its performance, fits batch production.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is video sending module circuit structure of the present invention；
Fig. 3 is audio sending module circuit structure of the present invention；
Fig. 4 is data reception module circuit structure of the present invention；
Fig. 5 is present invention string and device and goes here and there device, light transmission circuit structure.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment
As shown in figure 1, the optical signal transmission launch terminal based on FPGA, it is characterised in that including central processing unit, video
Sending module, audio sending module, data reception module, string and device simultaneously go here and there device, level shifting circuit and light transmission circuit, institute
Stating video sending module is used to standard analog video signal being changed into data signal, and the audio sending module is believed for voice
Number collection and coding, the data reception module is used to receive the audio signal and cradle head control signal of reverse transfer, described
Transformation and the transmission and reception of photosignal that light transmission circuit is used between photosignal, the string and device are used to receive light
The serial signal that transmission circuit is received, and serial signal is converted into parallel signal, it is described and go here and there device and be used for central processing unit
The parallel signal of transmission is converted to serial signal, and transmits it to light transmission circuit, and the level shifting circuit is used for will simultaneously
The level of string device and string and device and the electrical level match of light transmission circuit；The central processing unit uses FPGA, for receiving and locating
Video sending module, audio sending module, string and the positive signal of device are managed, and will be transmitted after the signal transacting reversely received to number
According to receiving module and device of going here and there.FPGA uses EP2C5T144C8N.
As shown in Fig. 2 video sending module uses TVP5150AM1 chips, video is inputted through 1 pin A1P1A, SPDATA0-
SPDATA7 is 8 ITU-R BT.656 digital videos outputs.When video is after 1 pin A1P1A input chips, first pass around certainly
Dynamic clamper and auto-gain circuit, by video processing circuits be again then to carry out analog-to-digital conversion, the built-in chip type one 9
Analog-digital converter, its sampling clock be 27MHz；Vision signal after analog-to-digital conversion is separated via colourity and brightness again
Processing of circuit, produces carrier chrominance signal all the way and all the way luminance signal, and the two paths of signals is filtered respectively through auto-adaptive comb filter
Ripple, then produces 84 by output control circuit:2:2 digital videos or 8 numbers of the ITU-R BT.656 with synchronizing information
Word video.
As shown in figure 3, audio sending module uses MC14LC5480 chips, when input audio signal, audio signal is defeated
Enter end and first pass around operational amplifier, subsequently into low pass filter, the high-frequency interferencing signal in audio signal is filtered out and turned
Turn to two paths of differential signals, two paths of differential signals is respectively again by bandpass filter, the FREQUENCY CONTROL of differential signal in 200Hz
To between 3400Hz, afterwards again by the difference A/D converter of high speed, PCM code DAB signal outputs are eventually become.
As shown in figure 4, data reception module, using MAX485 chips.The optical signal data that light transmission circuit is received,
Become electric signal by photoelectric conversion and give fpga chip, then fpga chip taps compound data-signal, separate
Pcm encoder voice data is directly inputted to above-mentioned voicefrequency circuit interface all the way, and another road cradle head control data-signal passes through
MAX485 chips carry out data conversion, are converted to the signal of standard serial 485 of cradle head control.
As shown in figure 5, and go here and there device using Max9205 chips, go here and there and device use Max9206 chips, and light transmission circuit
The transmitting-receiving of light use light integration module, the transmitting of light is integrated with LD and control driving chip, receiving module be integrated with PIN and after
Continuous amplifying circuit, output signal conforms generally to PECL level, and such a mode circuit structure is simple, and integrated level is high, and debugging is convenient,
Reliability is high.Light integration module uses RTXM123-3-35-SC, should and go here and there the digital audio/video that device MAX9205 sends
Composite information is converted into optical signal and sent, and needs to receive the reverse data signal from distal end again, and have reverse data
Optical signal is converted into electric signal and gives string and device MAX9206.High speed LVDS signals in figure after MAX9205 conversions by OUT+ and
OUT- two pins are exported, via anti-two pins of TD and TD for inputting RTXM123-3-35-SC after level conversion for PECL level,
Optical signal is converted to afterwards is sent to distal end.The optical signal that RTXM123-3-35-SC is received after photoelectric conversion by RD and
The anti-two pins outputs of RD, the level of output signal is PECL level herein, is LVDS feedings string and device by level translation
MAX9206 two leads ends of RI+ and RI-, the serial signal is converted into parallel signal feeding fpga core through string and device and handled
In chip.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (5)
1. the optical signal transmission launch terminal based on FPGA, it is characterised in that including central processing unit, video sending module, sound
Frequency sending module, data reception module, string and device simultaneously go here and there device, level shifting circuit and light transmission circuit, and the video sends mould
Block is used to standard analog video signal being changed into data signal, and the audio sending module is used for collection and the volume of voice signal
Code, the data reception module is used for the audio signal and cradle head control signal for receiving reverse transfer, and the smooth transmission circuit is used
The transmission and reception of transformation and photosignal between photosignal, the string and device are used to receive the reception of light transmission circuit
Serial signal, and serial signal is converted into parallel signal, it is described and go here and there the parallel letter that device is used to transmit central processing unit
Number be converted to serial signal, and transmit it to light transmission circuit, the level shifting circuit is used to and to go here and there device and string and device
Level and light transmission circuit electrical level match；The central processing unit uses FPGA, and mould is sent for receiving and handling video
Block, audio sending module, string and the positive signal of device, and will be transmitted after the signal transacting reversely received to data reception module,
And go here and there device.
2. the optical signal transmission launch terminal according to claim 1 based on FPGA, it is characterised in that the video is sent
Module uses TVP5150AM1 chips.
3. the optical signal transmission launch terminal according to claim 1 based on FPGA, it is characterised in that the audio is sent
Module uses MC14LC5480 chips.
4. the optical signal transmission launch terminal according to claim 1 based on FPGA, it is characterised in that described and go here and there device and adopt
Use Max9205 chips.
5. the optical signal transmission launch terminal according to claim 1 based on FPGA, it is characterised in that the string simultaneously adopt by device
Use Max9206 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710257720.XA CN106973269A (en) | 2017-04-19 | 2017-04-19 | Optical signal transmission launch terminal based on FPGA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710257720.XA CN106973269A (en) | 2017-04-19 | 2017-04-19 | Optical signal transmission launch terminal based on FPGA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106973269A true CN106973269A (en) | 2017-07-21 |
Family
ID=59333721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710257720.XA Withdrawn CN106973269A (en) | 2017-04-19 | 2017-04-19 | Optical signal transmission launch terminal based on FPGA |
Country Status (1)
| Country | Link |
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| CN (1) | CN106973269A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112437330A (en) * | 2020-11-09 | 2021-03-02 | 天津卓创润兴科技有限公司 | Safe and stable video acquisition system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202565410U (en) * | 2012-05-17 | 2012-11-28 | 吴琦 | Plastic optical fiber type video transceiver |
| CN103200395A (en) * | 2013-04-08 | 2013-07-10 | 广州市澳视光电子技术有限公司 | Intelligent fault report optical transceiver and network management client system thereof |
| CN103326785A (en) * | 2013-06-28 | 2013-09-25 | 成都思迈科技发展有限责任公司 | Vehicle-mounted optical transmitter and receiver |
| CN105208298A (en) * | 2015-10-28 | 2015-12-30 | 大连科迪视频技术有限公司 | Matrix switching system and matrix switching method for switching among multi-format video signals |
-
2017
- 2017-04-19 CN CN201710257720.XA patent/CN106973269A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202565410U (en) * | 2012-05-17 | 2012-11-28 | 吴琦 | Plastic optical fiber type video transceiver |
| CN103200395A (en) * | 2013-04-08 | 2013-07-10 | 广州市澳视光电子技术有限公司 | Intelligent fault report optical transceiver and network management client system thereof |
| CN103326785A (en) * | 2013-06-28 | 2013-09-25 | 成都思迈科技发展有限责任公司 | Vehicle-mounted optical transmitter and receiver |
| CN105208298A (en) * | 2015-10-28 | 2015-12-30 | 大连科迪视频技术有限公司 | Matrix switching system and matrix switching method for switching among multi-format video signals |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112437330A (en) * | 2020-11-09 | 2021-03-02 | 天津卓创润兴科技有限公司 | Safe and stable video acquisition system |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170721 |
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| WW01 | Invention patent application withdrawn after publication |