CN111866405A - Video matrix equipment based on optical fiber transmission - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/2628—Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- H—ELECTRICITY
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- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- 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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Abstract
The invention provides a video matrix device based on optical fiber transmission, which comprises: video matrix input: the device comprises a first optical port and a processor, wherein the processor comprises a video coding module and a first transceiver module, and the video coding module is connected with the first optical port through the first transceiver module; video matrix output: the controller comprises a video decoding module and a second transceiver module, and the video decoding module is connected with the second optical port through the second transceiver module; the first optical port and the second optical port are connected by an optical fiber. The invention has the advantages that the input end equipment and the output end equipment are separated, and both the input end equipment and the output end equipment adopt an embedded scheme, so that the coupling degree is greatly improved, and the equipment is smaller and more portable.
Description
Technical Field
The invention relates to the field of communication and multimedia, in particular to high-speed low-delay video matrix equipment based on optical fiber transmission.
Background
The video matrix refers to an electronic device which outputs M paths of video signals to N paths of monitoring equipment at will by an array switching method, and generally, the input of the matrix is larger than the output, i.e., M > N. The current video matrix realization method is divided into an analog matrix and a digital matrix and is used in various monitoring places. The analog matrix means that video switching is completed on an analog video layer, and signal switching is mainly realized by adopting a singlechip or a more complex chip to control an analog switch. The digital matrix means that video switching is completed on a digital video layer, the process can be synchronous or asynchronous, the core is the processing of digital video, AD conversion is required to be added at a video input end to convert an analog signal into a digital signal, DA conversion is added at a video output end to convert the digital signal into analog output, and the video switching is converted by an analog switch of the analog matrix into the processing and transmission of the digital video. Generally, an analog video matrix is a conventional device, so that expansion is relatively limited, configuration is not flexible enough, and distributed design and layout of the device are difficult to realize; the digital video matrix is a composition system and comprises an IP camera, coding and decoding equipment, a management platform and a network transmission system. With the development of high-definition hybrid matrix technology towards digitization, high-definition and networking, a digital video matrix with small volume, higher coupling degree and convenient operation tends to be great.
In current digital video matrix system, coding and decoding equipment, management platform and network transmission system are independent respectively, the degree of coupling is not high enough, and network transmission channel is with the network dielectric medium at most, and output channel of the same kind only can correspond a certain way of output video input channel, under the occasion that output display device quantity is not enough but need all inputs of control, need incessantly switch the corresponding relation of configuration output and input channel, at this moment, if can be with arbitrary video input channel through zooming, the stack is handled and is shown just can improve user experience on same output device greatly. Moreover, the current digital video matrix device usually only supports the web configuration on the host of the management platform, and no corresponding authority management results in that other users cannot view the current configuration, and the usage is not flexible and autonomous.
Patent document CN201657135U discloses a multi-channel remote monitoring video matrix server, which includes a processing control unit, a video decoding module, a storage module, an allocation module and an input/output interface, wherein a single chip microcomputer is used or used as the processing control unit, a network interface, a road video decoding module and the storage module are connected to the processing control unit, the storage, decoding and responses defined by a user are controlled by the processing control unit, the network interface receives data from a monitoring video in a working environment, and then decodes the data by the video decoding module, the decoded data is stored in the storage module, and the allocation module allocates the data to each output interface. The scheme receives video streams through a plurality of dielectric network interfaces, adopts a DSP controller to complete the stream control of data streams, decodes input sources and outputs the decoded input sources to different display channels, and can display the same input source in different display channels in different output formats by 4 different output modes such as DVI, HDMI, VGA, TV and the like.
The disadvantages of the existing digital video matrix include the following aspects:
1. each separation device is independent and has low coupling degree.
2. The digital video matrix network has the advantages of more network dielectric medium, short transmission distance and poor signal quality.
3. When the digital video matrix is used, the use occasions that the number of display equipment at the output end is insufficient and all input channels need to be monitored cannot be met.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a video matrix device based on optical fiber transmission.
The invention provides a video matrix device based on optical fiber transmission, which comprises:
video matrix input: the device comprises a first optical port and a processor, wherein the processor comprises a video coding module and a first transceiver module, and the video coding module is connected with the first optical port through the first transceiver module;
video matrix output: the controller comprises a video decoding module and a second transceiver module, and the video decoding module is connected with the second optical port through the second transceiver module;
the first optical port and the second optical port are connected by an optical fiber.
Preferably, the processor comprises:
A video channel gating submodule: the DVI-D video channels of different servers are gated;
an encoding submodule: the method comprises the encoding functions of various algorithm formats, and video encoding is carried out on video data of a gated DVI-D video channel;
the protocol conversion submodule comprises: and carrying out protocol conversion on the coded video data and inputting the coded video data into the first transceiving module.
Preferably, the controller includes:
a video decoding sub-module: the encoding function comprising a plurality of algorithm formats decodes the acquired video data;
a channel switching submodule: switching the corresponding video channel according to the video channel and the coding and decoding mode information acquired by panel input or webpage configuration;
a video processing sub-module: performing video processing including superposition and scaling on video data of the corresponding video channel;
a drive output submodule: and transmitting the processed video data to a display for driving and displaying.
Preferably, the first optical port and the second optical port each include: a first optical module and a second optical module which convert optical signals into electrical signals and convert electrical signals into optical signals;
the first optical module and the second optical module are backups of each other.
Preferably, the video matrix output end further comprises a control panel, and the control panel is connected with the controller and can input video channel and coding and decoding mode information.
Preferably, the video matrix output end further comprises a web page end, and the web page end is connected with the controller and can input video channel and coding and decoding mode information.
Preferably, the web page end comprises an authority management module, and can provide a corresponding control function according to the user authority.
Preferably, the processor further includes an instruction interaction control sub-module, and video channel and coding and decoding mode information acquired by panel input or web page configuration are summarized to the instruction interaction control sub-module to switch the corresponding video channel.
Preferably, the driving output submodule outputs LVDS video data.
Preferably, the controller comprises an FPGA.
Compared with the prior art, the invention has the following beneficial effects:
1) the system is simplified and integrated into two separate devices, namely an input device and an output device, by relying on the common functions of the original digital video matrix device, the input device and the output device both adopt an embedded scheme, the coupling degree is greatly improved, and the devices are smaller and more portable;
2) The invention relies on the common function of the original digital video matrix equipment, the interconnection and intercommunication of the input end equipment and the output end equipment is improved into optical fiber from a network dielectric medium, and the remote communication connection is realized through an optical switch and is not limited in the same space, thereby greatly increasing the transmission distance and the signal quality, improving the performance of the equipment and improving the flexibility of the use scene;
3) the invention relies on the common function of the original digital video matrix equipment, improves the output end into the output display equipment which can display any X-channel (X is 1-M) video input channel in M-channel video input channels on the same output channel after zooming and overlapping processing, is suitable for the use occasions where the number of the output end display equipment is insufficient but all the input channels need to be monitored, ensures that the use is more convenient and friendly, and improves the user experience;
4) the invention relies on the common function of the original digital video matrix equipment, adds a plurality of remote management control modes such as WEB webpage configuration, user authority management, panel key control of output end equipment and the like, and each user can only check or modify specific parameter configuration items according to different authorities, thus the man-machine interaction is more friendly and diversified.
5) The invention relies on the common function of the original digital video matrix equipment, improves the redundant design scheme that the interconnection and intercommunication ports of the input end equipment and the output end equipment are both redundant, supports the redundant function from the hardware and software drive, and ensures the safety and reliability of the data transmission channel;
6) the invention relies on the general function of the original digital video matrix equipment, improves the video coding and decoding of different algorithm formats for DVI-D video channels, improves the transmission bandwidth of high-definition large-resolution video stream, and simultaneously, the network data stream is always the coded video data, so that the system is safer and more reliable;
7) the invention relies on the common function of the original digital video matrix equipment, increases the authority management of the WEB login interface, checks and modifies each parameter configuration according to the authority, completes the required parameter configuration and the remote control and management of the input video source, and ensures the data conversion and transmission safety between the video data stream and the network data stream to a certain extent.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a block diagram of a video matrix input hardware architecture;
FIG. 3 is a block diagram of a hardware architecture for the output of a video matrix;
FIG. 4 is a diagram of a processor software implementation architecture;
FIG. 5 is a functional block diagram of the internal logic of the controller;
fig. 6 is a schematic diagram of the mode of use of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention relates to a digital video matrix technology, which is characterized in that a digital video matrix in a common meaning forms a new system architecture by an input end and an output end, and the input end and the output end are interconnected and communicated through an optical fiber and an Ethernet optical switch to realize remote control management of a monitoring control output end on a video input end. The LVDS end can realize the output of 1 for 4 paths of DVI-D video signals and the output of 2 paths of LVDS video formats, can also carry out the zooming and overlapping display output of any other multi-path (2, 3 and 4 paths) combination besides the output of 1 for 4 paths of DVI-D video sources, can carry out H.264 and H.265 format coding and decoding on input video, and in addition, different users can log in a WEB page through respective authorities to check and modify various configuration parameters so as to realize the remote control and management functions.
As shown in fig. 1, the present invention provides a high-speed low-latency video matrix device based on optical fiber transmission, including: the video matrix input end and the video matrix output end are interconnected through an optical fiber and an Ethernet optical switch, so that the problem of long-distance transmission is solved, and the signal quality during long-distance transmission is ensured by an optical fiber transmission technology.
The video matrix input end comprises a first optical port and a processor, the processor comprises a video coding module and a first receiving and transmitting module, and the video coding module is connected with the first optical port through the first receiving and transmitting module. The video matrix output end comprises a second optical port and a controller, the controller comprises a video decoding module and a second receiving and transmitting module, and the video decoding module is connected with the second optical port through the second receiving and transmitting module. The first optical port and the second optical port are connected by an optical fiber.
The first optical port and the second optical port each include: the first optical module and the second optical module convert optical signals into electric signals and convert the electric signals into optical signals, and the first optical module and the second optical module are backups of each other. The dual redundancy design supports the redundancy function from the aspects of hardware and software, when one path of the redundancy function fails, the other path of the redundancy function can take over the communication smoothly, and the safety and reliability of the system are greatly improved.
The processor gates DVI-D video channels of different servers, performs video coding on video data of the gated DVI-D video channels through the coding function of various algorithm formats, performs protocol conversion on the coded video data, and inputs the coded video data into the first transceiver module.
The controller decodes the acquired video data by using the encoding function of various algorithm formats, switches the corresponding video channels according to the video channels and the encoding and decoding mode information acquired by panel input or webpage configuration, performs video processing including superposition and scaling on the video data of the corresponding video channels, and transmits the processed video data to the display for driving and displaying.
In this embodiment, the input end of the video matrix is implemented by a haisi processor Hi3559AV100ES, which performs related functions including video channel gating, video coding implementation and protocol conversion of video stream to network stream, the network stream is implemented by converting an electrical signal into an optical signal through an optical module extended from the processor, and a dual redundant circuit increases and guarantees the reliability of the system; the output end of the video matrix is taken as a main controller by a JFM7K325TFFG900FPGA, the protocol conversion, video decoding, video superposition and scaling processing of network flow to video stream are completed by adopting internal logic resources, and the output is driven to be in an LVDS format, and a dual-redundancy circuit increases and guarantees the reliability of the system.
As shown in fig. 2, the video matrix input end hardware design of this embodiment is implemented by a haisi processor, and the peripheral is collocated with a memory, a FLASH, a clock, a reset, a power supply, an RS232, a dual redundant optical network, and a DVI multi-path switching and video format conversion circuit. The method comprises the steps of converting DVI-D video input into an MIPI video format for processing by utilizing the powerful video processing capacity of a Haesi multimedia processor HI3559A, carrying out coding processing of an H.264 or H.265 format according to communication requirements, and converting a processed video stream into a network packet to be transmitted to an optical fiber.
As shown in fig. 3, the hardware design of the output end of the video matrix of this embodiment is implemented by using an FPGA, and the periphery is collocated with a memory, a FLASH, a clock, a reset, a power supply, an RS232, a dual redundant optical network, and an LVDS output circuit. The optical module receives a network data packet, the FPGA internal logic analyzes the network packet, the protocol conversion and decoding processing of the video stream, the scaling and superposition processing of the multi-channel video stream and the output driving of the LVDS are completed.
As shown in fig. 4, the software design on the haisi multimedia processor at the video matrix input end of this embodiment mainly includes UBOOT based on the haisi HI3559A platform, an operating system layer, an operating system adaptation layer, a network protocol processing layer, a media software processing platform, and related application components. The network protocol processing layer comprises an RTP streaming media transmission protocol, an SIP session initiation protocol, a TCP/IP and a UDP/IP network transmission protocol. The media software processing layer mainly comprises a video input acquisition VI, a video processing VPSS, a video coding VENC, a video stream output VENC and a video cache pool. The application layer mainly completes the functions of video switching, video compression processing, WEB application, user authority management, firmware online updating and the like.
As shown in fig. 5, the internal logic design on the FPGA controller at the output end of the video matrix of this embodiment mainly includes main functional modules such as network receiving, protocol parsing, instruction returning, video processing, storage control, instruction interaction control, image display control, and LVDS output. The command interaction can be obtained through two channels, a panel control key at the output end of a video matrix is directly obtained through GPIO IP inside an FPGA, the other is controlled through webpage access and is output through a network data packet protocol analysis module, the two control modes are uniformly summarized to the command interaction control module to carry out decoding, scaling parameter configuration, superposition processing configuration and the like, meanwhile, when the command interaction control module finds that the command needs to be returned to the input end of the video matrix, the information is output to the network data packet command returning module and is output to a peripheral network circuit related to the FPGA through redundancy processing logic and MAC IP, and the input end of the video matrix receives the command through an optical port. The instruction obtained by the instruction interaction control module is used for controlling the video decoding mode and the specific parameter configuration of video zooming and overlaying. After the video processing is finished, the cache, the reading and the writing operations of the data are finished through the storage control part; whether the data of the video processing part is written into the DDR3 or corresponding data is read from the DDR3 to be displayed by the image display module is judged through the arbitrator. The image display module can combine the parameter instruction to control the video data to be read, the data is sent to the liquid crystal screen for display through the LVDS output module, and the LVDS output module can complete corresponding time sequence adaptation according to the time sequence parameters of the liquid crystal screen to complete output display.
Fig. 6 is a schematic diagram of the mode of use of the present invention. The video matrix input end equipment is placed in the machine room, connected with DVI video channels of the servers through related cables and connected with a power supply required by normal work, and the video matrix input end equipment is connected with optical fibers. The video matrix output end equipment is placed in a command room, connected with a power supply required by normal work of the equipment, connected with an LVDS liquid crystal display and connected with optical fibers, wherein the optical fibers are all interconnected through an optical switch. An operator in the command room can directly perform management configuration such as channel switching, video coding and decoding format selection and the like according to the keys of the equipment panel at the output end of the video matrix; meanwhile, users scattered everywhere can log in WEB pages to carry out configuration according to respective authority, can check and modify various configuration parameters, complete parameter configuration such as server DVI output channel switching, video coding and decoding format selection, superposition of multiple video input sources, scaling position resolution and the like, and ensure data conversion and transmission safety between video data streams and network data streams to a certain extent.
Aiming at the problems that each separation device in the current digital video matrix system is independent and the coupling degree is not high, the digital video matrix is improved into an input end device and an output end device, the input end device and the output end device adopt an embedded scheme, the coupling degree is greatly improved, and the devices are smaller and more portable;
Aiming at the fact that the network dielectric medium is used for transmission of the current digital video matrix network, interconnection and intercommunication of input end equipment and output end equipment are improved into optical fibers, and long-distance communication connection is achieved through an optical switch, so that the transmission distance and the signal quality are greatly increased, and the performance and the using effect of the equipment are improved;
when using to current digital video matrix, output display device quantity is not enough but need monitor all input channel's use occasion, improves the output and to can show arbitrary X way (X ═ 1 ~ M) video input channel in M way video input channel on same output channel's output display device after zooming, stack processing for use more convenient friendly, user experience is better.
Aiming at the problems that the current digital video matrix only supports the webpage configuration on a management platform host when in use, and various management control modes such as user authority management, WEB webpage configuration, output end equipment panel key control and the like are added, each user can only check or modify specific parameter configuration items according to different authorities, and the man-machine interaction is more friendly and diversified.
Aiming at the development trend of the current video matrix equipment to digitalization, high-definition and networking and the safety and reliability requirements of video monitoring, the network optical ports of the input end equipment and the output end equipment adopt a redundancy design scheme, and a redundancy function is supported from hardware and software driving, so that the safety and reliability of a data transmission channel are ensured; the invention carries out video coding and decoding with different algorithm formats on the DVI-D video channel so as to improve the transmission bandwidth of high-definition large-resolution video stream, and meanwhile, the network data stream is always the coded video data, so that the system is safer and more reliable; the invention increases the authority management of the WEB login interface, checks and modifies each parameter configuration according to the authority, completes the required parameter configuration and the remote control and management of the input video source, and ensures the data conversion and transmission safety between the video data stream and the network data stream to a certain extent.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A video matrix apparatus based on optical fiber transmission, comprising:
video matrix input: the device comprises a first optical port and a processor, wherein the processor comprises a video coding module and a first transceiver module, and the video coding module is connected with the first optical port through the first transceiver module;
Video matrix output: the controller comprises a video decoding module and a second transceiver module, and the video decoding module is connected with the second optical port through the second transceiver module;
the first optical port and the second optical port are connected by an optical fiber.
2. The fiber optic transmission-based video matrix device of claim 1, wherein the processor comprises:
a video channel gating submodule: the DVI-D video channels of different servers are gated;
an encoding submodule: the method comprises the encoding functions of various algorithm formats, and video encoding is carried out on video data of a gated DVI-D video channel;
the protocol conversion submodule comprises: and carrying out protocol conversion on the coded video data and inputting the coded video data into the first transceiving module.
3. The fiber optic transmission-based video matrix device of claim 1, wherein the controller comprises:
a video decoding sub-module: the encoding function comprising a plurality of algorithm formats decodes the acquired video data;
a channel switching submodule: switching the corresponding video channel according to the video channel and the coding and decoding mode information acquired by panel input or webpage configuration;
A video processing sub-module: performing video processing including superposition and scaling on video data of the corresponding video channel;
a drive output submodule: and transmitting the processed video data to a display for driving and displaying.
4. The fiber optic transmission-based video matrix device of claim 1, wherein the first optical port and the second optical port each comprise: a first optical module and a second optical module which convert optical signals into electrical signals and convert electrical signals into optical signals;
the first optical module and the second optical module are backups of each other.
5. The optical fiber transmission-based video matrix device according to claim 1, wherein the video matrix output terminal further comprises a control panel, and the control panel is connected to the controller and can input video channel and codec mode information.
6. The video matrix apparatus based on optical fiber transmission according to claim 1, wherein the video matrix output terminal further comprises a web page terminal, and the web page terminal is connected to the controller and can input video channel and codec mode information.
7. The video matrix device based on optical fiber transmission according to claim 6, wherein the web page side comprises a right management module capable of providing a corresponding control function according to a user right.
8. The video matrix device based on optical fiber transmission according to claim 1, wherein the processor further includes an instruction interaction control sub-module, and video channel and coding/decoding mode information obtained by panel input or web configuration are summarized to the instruction interaction control sub-module to switch the corresponding video channel.
9. The optical fiber transmission-based video matrix device according to claim 3, wherein the driving output submodule outputs LVDS video data.
10. The fiber optic transmission-based video matrix device of claim 1, wherein the controller comprises an FPGA.
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| CN114050890A (en) * | 2021-11-10 | 2022-02-15 | 北京机电工程研究所 | Multi-type information transmission device adaptive to optical fiber network |
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| CN106921834A (en) * | 2017-03-28 | 2017-07-04 | 北京小鸟科技股份有限公司 | KVM light matrix switching systems |
| CN111182277A (en) * | 2019-12-20 | 2020-05-19 | 深圳市巨潮科技股份有限公司 | Transmission system for transmitting DVI signals in long distance by optical fiber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114050890A (en) * | 2021-11-10 | 2022-02-15 | 北京机电工程研究所 | Multi-type information transmission device adaptive to optical fiber network |
| CN114050890B (en) * | 2021-11-10 | 2023-11-14 | 北京机电工程研究所 | Multi-type information transmission device suitable for optical fiber network |
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