CN112532955A - Optical fiber communication video acquisition device and method - Google Patents
Optical fiber communication video acquisition device and method Download PDFInfo
- Publication number
- CN112532955A CN112532955A CN202011388675.XA CN202011388675A CN112532955A CN 112532955 A CN112532955 A CN 112532955A CN 202011388675 A CN202011388675 A CN 202011388675A CN 112532955 A CN112532955 A CN 112532955A
- Authority
- CN
- China
- Prior art keywords
- video
- data
- format
- module
- protocol
- 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.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000013307 optical fiber Substances 0.000 title claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims description 72
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention relates to an optical fiber communication video acquisition device and a method, which comprises the following steps: the system comprises a video source, a matched cable, a video equalizer, a video connector, an FPGA, a photoelectric converter, a matched optical fiber cable, a memory and a power supply, wherein the power supply is used for supplying power to the FPGA; the video source, the matched cable, the video equalizer and the video connector form a video acquisition channel; the video source in each video acquisition channel is connected with the FPGA through a video connector and a video equalizer in sequence by a matching cable, the FPGA processes the received video data and converts the video data into data in an FC format, and the data in the FC format is respectively transmitted to a photoelectric converter and a memory; the photoelectric converter converts the received FC format data into optical signals and transmits the optical signals to a destination, and the memory is used for storing the received FC format data. The invention is suitable for various video protocols, the SDI supports HD-SDI,3G-SDI and the like, and the whole set of device is easy to operate, simple in structure and wide in practicability.
Description
Technical Field
The invention relates to the technical field of data communication, in particular to an optical fiber communication video acquisition device and method.
Background
Fiber optic communication technology (FC technology) stands out from optical communication, has become one of the main pillars of modern communication, and plays a very important role in modern telecommunication networks. As an emerging technology, optical fiber communication has a fast development speed in recent years, and a wide application range, which is rare in communication history, is also an important mark of the world new technology revolution and a main transmission tool of various information in the future information society. The optical fiber is far superior to the transmission of cable and microwave communication due to the wide transmission frequency band, high anti-interference performance and reduced signal attenuation.
The number of cameras carried on the motor vehicle is large, the processing of combining the cameras with the console is complex, and how to provide the video acquisition device and the transmission method based on optical fiber communication can play an important practical significance on the high efficiency and stability of video processing.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an optical fiber communication video collecting device and method, which effectively solve the problem of stable collection and transmission of multiple protocol cameras, multiple cameras, and high definition video.
In order to achieve the purpose, the invention adopts the following technical scheme: a fiber optic communication video capture method, comprising: step S1, generating a clock and a reset signal of the FPGA after power supply, configuring parameters of HD-SDI video transmission through an acquisition interface configuration module in the FPGA, and sending a video transmission starting instruction; step S2, 4 paths of video sources enter the FPGA chip through the 4-path connector and the equalizer respectively, the 4 paths of video processing modules process the video format, and the video acquisition processing is carried out to convert the video source into data in FC format; and S3, outputting the data in the FC format to the photoelectric conversion module through the FC protocol communication module of the FPGA, converting the data into optical signals and sending the optical signals to a destination so as to meet the use requirement.
A fiber communication video acquisition device for realizing the method comprises: the system comprises a video source, a matched cable, a video equalizer, a video connector, an FPGA, a photoelectric converter, a matched optical fiber cable, a memory and a power supply, wherein the power supply is used for supplying power to the FPGA; the video source, the matched cable, the video equalizer and the video connector form a video acquisition channel; the video source in each video acquisition channel is connected with the FPGA sequentially through the video connector and the video equalizer by a matching cable, the FPGA processes received video data and converts the video data into data in an FC format, and the data in the FC format is respectively transmitted to the photoelectric converter and the memory; the photoelectric converter converts the received FC format data into optical signals and transmits the optical signals to a destination, and the memory is used for storing the received FC format data.
Furthermore, the system also comprises a clock module and a reset module which are connected with the FPGA.
Furthermore, the FPGA comprises more than one video processing module, an acquisition interface configuration module and an FC protocol communication module; the acquisition interface configuration module performs parameter configuration of HD-SDI video transmission on each path of video processing module; the video data transmitted by each video equalizer is respectively transmitted to a corresponding one of the video processing modules, and the processed video data is transmitted to the FC protocol communication module through the acquisition interface configuration module after being processed by the video processing module; transmitting to the photoelectric converter by the FC protocol communication module; the FC clock signal input from the outside is transmitted to the FC protocol communication module, and the reset signal input from the outside is respectively transmitted to the FC protocol communication module and the acquisition interface configuration module.
Furthermore, each video processing module comprises a video format processing module and a video acquisition processing module; and the video format processing module performs format processing on the received video data and transmits the video data to the video acquisition processing module for processing to obtain data in an FC protocol format.
Further, the video format processing module is used for completing the processing of the optical fiber communication video acquisition device on the HD-SDI video communication protocol, and the processing method comprises the following steps:
and converting the differential SDI input signal to a parallel signal under an FC clock by using high-speed serial communication, decomposing the parallel signal into an SDI video component signal according to an HD-SDI protocol, and finally performing bit conversion and RGB conversion on the SDI video component signal to adapt to a subsequent video acquisition processing module interface.
Further, the video acquisition module is used for completing the conversion of video field, line and data synchronous signals of the optical fiber communication video acquisition device and the selection of camera video/test video, and the acquisition processing method comprises the following steps:
receiving data transmitted by a video format processing module, performing anti-disturbance processing, and after a signal is stable, performing parallel processing on four conversions under an FC protocol clock: HD-SDI field synchronizing signals in the video signals are converted into field synchronizing signals under an FC-AV protocol; HD-SDI line synchronizing signals in the video signals are converted into line synchronizing signals under an FC-AV protocol; the HD-SDI data effective signals in the video signals are converted into data effective signals under an FC-AV protocol; and converting the HD-SDI data format into a data format under the FC-AV protocol, and supplementing 0 in high order.
Furthermore, the video acquisition processing module provides an interface for switching the camera video and the test video.
Further, the FC protocol communication module adopts an FC-AV standard protocol to perform video transmission.
Further, the apparatus further comprises a UART; and the FPGA carries out serial port communication with equipment outside the device through the UART.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the invention meets the requirement of multi-channel video real-time transmission in video transmission, and the video is transmitted by optical fiber, thereby having high bandwidth and good stability. 2. The invention is suitable for various video protocols, the SDI supports HD-SDI,3G-SDI and the like, and the whole set of device is easy to operate, simple in structure and wide in practicability.
Drawings
Fig. 1 is a schematic overall structure diagram of a video acquisition device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an internal logic structure of an FPGA chip according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
In a first embodiment of the invention, a fiber-optic communication video acquisition device is provided, which is used for receiving and acquiring motor vehicle panoramic high-definition video input by a camera of a 4-path HD-SDI protocol through fiber-optic communication. As shown in fig. 1, the apparatus includes a video source and a mating cable, a video equalizer, a video connector, an FPGA, a photoelectric converter and a mating optical fiber cable, a memory and a power supply; the power supply is used for supplying power for the FPGA. In this embodiment, the number of the video sources and the associated cables, the video equalizers, the video connectors and the photoelectric converters is preferably 4, that is, four video acquisition channels are adopted, and each video acquisition channel includes a video source and an associated cable, a video equalizer and a video connector.
The video source in each video acquisition channel is connected with the FPGA through the video connector and the video equalizer in sequence by the matching cable, the FPGA processes the received video data and converts the video data into data in an optical fiber communication protocol format (FC protocol format), and the data in the FC protocol format is respectively transmitted to the photoelectric converter and the memory. The photoelectric converter converts the received data in the FC protocol format into an optical signal and transmits the optical signal to a destination; the memory is used for storing the received data in the FC protocol format.
The video signals transmitted by each video acquisition channel are composed of HD-SDI field synchronizing signals, HD-SDI line synchronizing signals, HD-SDI data effective signals and HD-SDI data signals.
In a preferred embodiment, the optical fiber communication video acquisition device further comprises a clock module and a reset module which are connected with the FPGA; and transmitting a clock reference signal and a reset signal to the FPGA by the clock module and the reset module.
In a preferred embodiment, as shown in fig. 2, the FPGA includes more than one video processing module, an acquisition interface configuration module, and an FC protocol communication module. In this embodiment, the video processing module preferably adopts four paths; the first, second, third and fourth video processing modules have the same structure and principle. The acquisition interface configuration module performs parameter configuration of HD-SDI video transmission on each video processing module; the video data transmitted by each video equalizer are respectively transmitted to a corresponding video processing module, and the processed video data are transmitted to the FC protocol communication module through the acquisition interface configuration module after being processed by the video processing module; and transmitting the data to the photoelectric converter by the FC protocol communication module. The FC clock signal input from the outside is transmitted to the FC protocol communication module, and the input reset signal is respectively transmitted to the FC protocol communication module and the acquisition interface configuration module.
In the above embodiment, the acquisition interface configuration module is internally provided with a serial port module, and the serial port module is preferably a 485 serial port module in this embodiment.
In the above embodiment, each video processing module includes a video format processing module and a video capture processing module. And the video format processing module performs format processing on the received video data and transmits the video data to the video acquisition processing module for processing to obtain data in the FC protocol format.
The video format processing module mainly completes processing of the HD-SDI video communication protocol by the optical fiber communication video acquisition device. The specific format processing method of the video format processing module comprises the following steps: .
And (4) setting constraints: the setting is carried out according to register constraints specified by a xilinx FPGA instruction manual, a xilinx servers IP and an FC communication IP library.
The specific operation method comprises the following steps: and converting the differential SDI input signal to a parallel signal under an FC clock by using high-speed serial communication, decomposing the parallel signal into an SDI video component signal according to an HD-SDI protocol, and finally performing bit conversion and RGB conversion on the SDI video component signal to adapt to a subsequent video acquisition processing module interface.
The video acquisition module mainly completes the functions of video field, line and data synchronous signal conversion and camera video/test video selection of the optical fiber communication video acquisition device. The specific processing method of the video acquisition processing module comprises the following steps:
and (4) setting constraints: the setting is carried out according to the register constraint specified by a xilinx FPGA instruction manual and an FC communication IP library.
The specific operation method comprises the following steps: receiving data transmitted by a video format processing module, performing anti-disturbance processing, and after a signal is stable, performing parallel processing on four conversions under an FC protocol clock: the HD-SDI field synchronizing signals are converted into field synchronizing signals under an FC-AV protocol, the HD-SDI line synchronizing signals are converted into line synchronizing signals under the FC-AV protocol, the HD-SDI data effective signals are converted into data effective signals under the FC-AV protocol, and the HD-SDI data format is converted into a data format (high-order complement 0) under the FC-AV protocol so as to adapt to an FC protocol communication module interface and fulfill the aim of sending video signals.
Preferably, in order to improve the testability, the video acquisition processing module further provides an interface for switching the camera video and the test video, and the switching can be performed according to the parameter input, so that the test and the debugging are convenient when the camera is not connected.
In the above embodiment, the FC protocol communication module uses the FC-AV standard protocol for video transmission.
In a preferred embodiment, the optical fiber communication video capture device further comprises a UART (asynchronous receiver transmitter); the FPGA carries out serial port communication with equipment outside the device through the UART.
In a preferred embodiment, the memory includes memory and FLASH (FLASH memory). The memory adopts DDR3 memory bank.
In the above embodiments, the apparatus may accept a plurality of video protocols, such as the SDI protocol supporting HD-SDI,3G-SDI, and the like.
In the above embodiments, the video source is a camera, and the camera communicates with the FPGA by using a serial protocol.
In a second embodiment of the present invention, a fiber-optic communication video capture method is provided, which includes:
step S1, generating a clock and a reset signal of the FPGA after power supply, configuring parameters of HD-SDI video transmission through an acquisition interface configuration module in the FPGA, and sending a video transmission starting instruction;
the parameter configuration comprises image size, color, hierarchy, resolution, number of selected paths and the like;
step S2, 4 paths of video sources enter the FPGA chip through the 4-path connector and the equalizer respectively, the 4 paths of video processing modules process the video format, and the video acquisition processing is carried out to convert the video source into data in FC format;
s3, outputting the data in FC format to the photoelectric conversion module through the FC protocol communication module of the FPGA, converting the data into optical signals and sending the optical signals to a destination so as to meet the use requirement;
the FC protocol communication module uses the FC-AV standard protocol to transmit video.
In the above steps, the serial port data is received and transmitted through the UART serial port of the FPGA, and can be in serial communication with an external device.
In summary, when the invention is used, the video format processing and the video acquisition processing can be flexibly processed by the FPGA so as to adapt to the requirements of different video protocols; through the UART serial port, can directly communicate with external equipment.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (10)
1. A fiber-optic communication video acquisition method is characterized by comprising the following steps:
step S1, generating a clock and a reset signal of the FPGA after power supply, configuring parameters of HD-SDI video transmission through an acquisition interface configuration module in the FPGA, and sending a video transmission starting instruction;
step S2, 4 paths of video sources enter the FPGA chip through the 4-path connector and the equalizer respectively, the 4 paths of video processing modules process the video format, and the video acquisition processing is carried out to convert the video source into data in FC format;
and S3, outputting the data in the FC format to the photoelectric conversion module through the FC protocol communication module of the FPGA, converting the data into optical signals and sending the optical signals to a destination so as to meet the use requirement.
2. A fiber optic video capture device for implementing the method of claim 1, comprising: the system comprises a video source, a matched cable, a video equalizer, a video connector, an FPGA, a photoelectric converter, a matched optical fiber cable, a memory and a power supply, wherein the power supply is used for supplying power to the FPGA; the video source, the matched cable, the video equalizer and the video connector form a video acquisition channel;
the video source in each video acquisition channel is connected with the FPGA sequentially through the video connector and the video equalizer by a matching cable, the FPGA processes received video data and converts the video data into data in an FC format, and the data in the FC format is respectively transmitted to the photoelectric converter and the memory; the photoelectric converter converts the received FC format data into optical signals and transmits the optical signals to a destination, and the memory is used for storing the received FC format data.
3. The apparatus of claim 2, further comprising a clock module and a reset module coupled to the FPGA.
4. The apparatus of claim 3, wherein the FPGA comprises more than one video processing module, an acquisition interface configuration module and an FC protocol communication module; the acquisition interface configuration module performs parameter configuration of HD-SDI video transmission on each path of video processing module; the video data transmitted by each video equalizer is respectively transmitted to a corresponding one of the video processing modules, and the processed video data is transmitted to the FC protocol communication module through the acquisition interface configuration module after being processed by the video processing module; transmitting to the photoelectric converter by the FC protocol communication module; the FC clock signal input from the outside is transmitted to the FC protocol communication module, and the reset signal input from the outside is respectively transmitted to the FC protocol communication module and the acquisition interface configuration module.
5. The apparatus of claim 4, wherein each of the video processing modules comprises a video format processing module and a video capture processing module; and the video format processing module performs format processing on the received video data and transmits the video data to the video acquisition processing module for processing to obtain data in an FC protocol format.
6. The apparatus of claim 5, wherein the video format processing module is configured to complete the processing of the HD-SDI video communication protocol by the optical fiber communication video capture apparatus, and the processing method is as follows:
and converting the differential SDI input signal to a parallel signal under an FC clock by using high-speed serial communication, decomposing the parallel signal into an SDI video component signal according to an HD-SDI protocol, and finally performing bit conversion and RGB conversion on the SDI video component signal to adapt to a subsequent video acquisition processing module interface.
7. The device as claimed in claim 5, wherein the video capture module is used for completing video field, line, data synchronization signal conversion, camera video/test video selection of the optical fiber communication video capture device, and the capture processing method is as follows:
receiving data transmitted by a video format processing module, performing anti-disturbance processing, and after a signal is stable, performing parallel processing on four conversions under an FC protocol clock: HD-SDI field synchronizing signals in the video signals are converted into field synchronizing signals under an FC-AV protocol; HD-SDI line synchronizing signals in the video signals are converted into line synchronizing signals under an FC-AV protocol; the HD-SDI data effective signals in the video signals are converted into data effective signals under an FC-AV protocol; and converting the HD-SDI data format into a data format under the FC-AV protocol, and supplementing 0 in high order.
8. The apparatus of claim 7, wherein the video capture processing module provides an interface for switching between camera video and test video.
9. The apparatus of claim 4, wherein the FC protocol communication module employs an FC-AV standard protocol for video transmission.
10. The apparatus of claim 2, wherein the apparatus further comprises a UART; and the FPGA carries out serial port communication with equipment outside the device through the UART.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011388675.XA CN112532955A (en) | 2020-12-01 | 2020-12-01 | Optical fiber communication video acquisition device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011388675.XA CN112532955A (en) | 2020-12-01 | 2020-12-01 | Optical fiber communication video acquisition device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112532955A true CN112532955A (en) | 2021-03-19 |
Family
ID=74996279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011388675.XA Pending CN112532955A (en) | 2020-12-01 | 2020-12-01 | Optical fiber communication video acquisition device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112532955A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134782A (en) * | 2017-12-15 | 2018-06-08 | 天津津航计算技术研究所 | A kind of method based on 10,000,000,000 network transmission high-bandwidth video of FCoE protocol realizations |
| US10097818B1 (en) * | 2016-12-27 | 2018-10-09 | Advanced Testing Technologies, Inc. | Video processor with digital video signal processing capabilities |
| CN209472705U (en) * | 2019-04-12 | 2019-10-08 | 上海赛治信息技术有限公司 | A kind of video frequency transmitter and the Video transmission system with the device |
-
2020
- 2020-12-01 CN CN202011388675.XA patent/CN112532955A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10097818B1 (en) * | 2016-12-27 | 2018-10-09 | Advanced Testing Technologies, Inc. | Video processor with digital video signal processing capabilities |
| CN108134782A (en) * | 2017-12-15 | 2018-06-08 | 天津津航计算技术研究所 | A kind of method based on 10,000,000,000 network transmission high-bandwidth video of FCoE protocol realizations |
| CN209472705U (en) * | 2019-04-12 | 2019-10-08 | 上海赛治信息技术有限公司 | A kind of video frequency transmitter and the Video transmission system with the device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103458432B (en) | Simulated BBU test device, system and method for LTE RRU | |
| CN109951653B (en) | CAN instruction switching multi-path multi-format photoelectric video signal output system and method | |
| CN106713804B (en) | A kind of triple channel image transmitting interface conversion method | |
| CN104754303B (en) | Multi-channel Transmission System and transmission method with high bandwidth, strong anti-interference | |
| CN106598889A (en) | SATA (Serial Advanced Technology Attachment) master controller based on FPGA (Field Programmable Gate Array) sandwich plate | |
| CN107171728B (en) | 1B4B and Manchester coded forward and reverse transmission method, device and system | |
| CN104660989B (en) | A kind of optical fiber based on FPGA turns full layout type Camera link realtime graphic optical transmitter and receivers | |
| WO2017012517A1 (en) | Hybrid physical coding sub-layer and method for transmitting and receiving data, and storage medium | |
| CN113572486B (en) | Transmitter with low-speed SerDes interface, receiver with low-speed SerDes interface and circuit design method of transmitter | |
| CN112713965B (en) | Rate matching method, system and related device suitable for CPRI protocol | |
| CN106209292B (en) | Method and device for realizing SDH optical interface of STM-1 by utilizing oversampling method | |
| CN112532955A (en) | Optical fiber communication video acquisition device and method | |
| CN104868953A (en) | Extensible multi-channel serial port optical transceiver based on FPGA (field programmable gate array) | |
| WO2023197549A1 (en) | Signal processing devices, systems and method, and signal transmission subsystem and system | |
| CN217116263U (en) | Wavelength division multiplexing optical fiber transmission system | |
| CN208061199U (en) | A kind of multi-channel high-speed data diostribution device | |
| CN2751314Y (en) | Digital video-audio optical fiber transmission system | |
| EP2584717A1 (en) | Method and system for testing jitter compatibility | |
| CN109996004A (en) | A kind of low power image imaging method, processor and device | |
| CN112865314B (en) | Submarine observation network connection box | |
| CN213403301U (en) | Optical fiber communication video acquisition device | |
| CN103716258A (en) | High-density line card, switching device, cluster system and electric signal type configuration method | |
| CN104967482B (en) | Multichannel IO synchronous control systems and method based on fiber optic communication | |
| CN109274607B (en) | Hundred/giga self-adaptive Ethernet-over-Ethernet physical layer implementation circuit | |
| CN107396214B (en) | 128 x 128 path broadband data signal real-time exchange system and exchange method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210319 |
|
| RJ01 | Rejection of invention patent application after publication |