CN210927788U - Large-scale video display control matrix equipment based on Ethernet switching technology - Google Patents
Large-scale video display control matrix equipment based on Ethernet switching technology Download PDFInfo
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- CN210927788U CN210927788U CN201922263694.9U CN201922263694U CN210927788U CN 210927788 U CN210927788 U CN 210927788U CN 201922263694 U CN201922263694 U CN 201922263694U CN 210927788 U CN210927788 U CN 210927788U
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Abstract
The utility model belongs to the technical field of the video shows accuse, concretely relates to extensive video shows accuse matrix equipment based on ethernet switching technology aims at solving the problem that prior art can't realize extensive multichannel video interconnection and switch. The utility model discloses a: one or more interface cards used for performing packet cutting, packaging, timing transmission, caching, recombination, image processing, sound processing and control processing on service data by distinguishing channels; the Ethernet switching unit performs data copying and forwarding based on switching configuration and a destination address of the data; the clock synchronization card provides a clock signal and a synchronization signal; the control card is used for switching and configuring the Ethernet exchange unit and the input channel and the output channel of the interface card. The utility model discloses equipment total capacity can use the linear increase of quantity along with the exchange chip, and the business data distinguishes the processing of passageway with the form of data packet, can realize extensive nothing and hinder nimble data exchange entirely, and equipment flexibility is high, and the data loss rate is low.
Description
Technical Field
The utility model belongs to the technical field of the video shows accuse, concretely relates to extensive video shows accuse matrix equipment based on ethernet switching technology.
Background
The video display and control equipment mainly comprises a video matrix and a splicing processor. The video matrix refers to an electronic device which outputs m paths of video signals to n paths of monitoring equipment randomly by an array switching method. There are some video matrices, also known as audio-visual matrices, which have audio switching capability and are capable of switching video and audio signals synchronously. The current video matrix has two main categories, analog matrix and digital matrix, in terms of its realization method. Video matrices are commonly used in various monitoring applications. The video splicing controller is professional video processing and control equipment, and has the main functions of dividing a video signal into a plurality of display units, outputting the divided display unit signals to a plurality of display terminals, and completing splicing a plurality of display screens to form a complete image.
In the existing video display control device, the interconnection switching of the video service backplane side is realized by a crosspoint chip, each input port of the crosspoint is connected with one input video, each output port of the crosspoint is connected with one output video, and the functions of switching connection and copying output of the video service are realized by configuring the connection relationship from input to output in the chip. Each input/output port of the crosspoint can only transmit one path of video traffic, which results in the maximum size of the device being limited by the number of interfaces of the chip. At present, the scale of the equipment can not meet the requirements of users, and a larger-scale equipment is urgently needed to realize the interconnection switching of multiple paths of videos.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned problem in the prior art, namely the problem that the prior art can not realize the interconnection and switching of the large-scale multipath video, the utility model provides a large-scale video display and control matrix equipment based on Ethernet switching technology, comprising a back plate, a power supply, a master control module, a fan and a chassis, the video display and control matrix equipment further comprises one or more interface cards, an Ethernet switching unit, a clock synchronization card and a control card;
the interface card is used for receiving and processing external service data, and sending the processed external service data to the Ethernet switching unit at regular time and uniform speed based on the signal of the clock synchronization card; the Ethernet switching unit is also used for receiving, processing and outputting the data after switching configuration sent by the Ethernet switching unit; the external service data comprises video, audio and control data;
the Ethernet switching unit is used for copying and forwarding corresponding data based on switching configuration and a destination address;
the clock synchronization card is used for providing a group of clock signals and synchronization signals; the clock signal is used for internal timing of the interface card; the synchronous signal is used for regularly calibrating the internal timing of each module;
the control card is used for switching and configuring the Ethernet exchange unit, the input channel and the output channel of the interface card.
In some preferred embodiments, the interface card comprises one or more input interfaces, one or more output interfaces, a data processing module, a first micro control module;
the input interface is used for acquiring external service data;
the output interface is used for outputting corresponding data sent by the Ethernet switching unit;
the data processing module is configured to perform data segmentation, packing and packaging on the external service data based on a control card configuration instruction acquired by the first micro control module; the first micro control module is further configured to cache, sort and recombine the data from the Ethernet switching unit, and perform service processing on the data based on a control card configuration instruction acquired by the first micro control module to generate new service data;
the first micro control module is used for forwarding a configuration instruction of the control card and configuring the Ethernet packet module and the service processing module in the data processing module.
In some preferred embodiments, "performing service processing on data to generate new service data" includes:
and performing one or more of image processing, sound processing and control instruction processing on the data to obtain new service data.
In some preferred embodiments, the ethernet switching unit comprises one or more ethernet switch cards; the Ethernet switch card comprises an Ethernet switch chip and a second micro control module;
the Ethernet switching chip is used for carrying equipment large-scale data switching;
the second micro control module is used for configuring the Ethernet switching chip.
In some preferred embodiments, "configuring the ethernet switch chip" includes:
initializing, forwarding table, and multicasting table.
In some preferred embodiments, the clock synchronization card comprises a PLL clock chip, a crystal oscillator, a third micro-control module, a frequency division module, and one or more clock driving chips;
the PLL clock chip generates a clock signal and a high-frequency clock by locking the crystal oscillator and based on the configuration of the third micro-control module;
the frequency division module is used for carrying out frequency division processing on the high-frequency clock to obtain a synchronous signal;
the clock driving chip is used for outputting clock signals and synchronous signals.
In some preferred embodiments, the clock signal frequency is below a set threshold.
In some preferred embodiments, there is no less than one pair of high speed bidirectional Serdes channels between the ethernet switch card and the interface card.
The utility model discloses an on the other hand, proposed a business data exchange and processing method, based on foretell extensive video display control matrix equipment based on ethernet switching technology, this method includes:
step S10, dividing the acquired external service data into data packets with fixed length, and adding sequence labels to the data packets respectively;
step S20, packaging the data packet added with the sequence label into an Ethernet data packet, generating a source address according to the position and the port of the current interface card, and generating a destination address according to the switching configuration;
step S30, based on the obtained synchronous signal, the Ethernet data packets are sent to the Ethernet switching unit in sequence according to the label at regular time and uniform speed;
step S40, the Ethernet exchange unit copies the corresponding Ethernet data packet and fills in the destination address according to the switching configuration, and forwards the Ethernet data packet according to the destination address;
step S50, the interface card receives the Ethernet data packet, and carries out data unpacking and caching according to the destination address sub-channel;
step S60, based on the sequence label of the data packet, the cached data packet is reordered to restore to the original service data;
and step S70, according to the configuration of the control card, performing one or more of image processing, sound processing and control instruction processing on the service data, generating and outputting new service data.
The utility model has the advantages that:
(1) the utility model discloses extensive video shows accuse matrix equipment based on ethernet switching technique, exchange card quantity can be according to the nimble extension of equipment scale, and equipment total capacity can be along with the linear increase of exchange chip use quantity, and data service no longer receives the restriction of physical interface, and every external interface and every backplate interface all can transmit a plurality of businesses, and this makes equipment all have huge promotion in the aspect of business quantity, total processing bandwidth, can satisfy the application demand of the more extensive scene of user.
(2) The utility model discloses extensive video shows accuse matrix equipment based on ethernet switching technique, distinguish the package of cutting of passageway through FPGA to business data, the package, regularly send, the buffer memory, reorganization, image processing, sound processing, control processing, FPGA cooperation exchange chip, the exchange processing of businesses such as video is handled with the form of data package, every video in every interface, the audio frequency, control business all distinguishes with the mode of passageway, exchange respectively, realized interface card physical interface neutron business channel's exchange scheduling and processing, the equipment flexibility has been promoted.
(3) The utility model discloses extensive video shows accuse matrix equipment based on ethernet switching technique sends data to the interface card through the clock synchronization card and carries out synchronous processing, eliminates the problem that ethernet packet switching burst bandwidth congestion lost package.
(4) The utility model discloses extensive video display and control matrix equipment based on ethernet switching technique, through the control card to FPGA's data packet address configuration, to switching chip's forwarding table and multicast table configuration, realized that every input service port of equipment does not have the function that the flexibility was switched to of every business output port's complete.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a large-scale video display and control matrix device based on the ethernet switching technology of the present invention;
fig. 2 is a schematic structural diagram of an interface card according to an embodiment of the large-scale video display control matrix device based on the ethernet switching technology of the present invention;
fig. 3 is a schematic structural diagram of an ethernet switch card according to an embodiment of the large-scale video display control matrix device based on the ethernet switch technology of the present invention;
fig. 4 is a schematic structural diagram of a clock synchronization card according to an embodiment of the large-scale video display control matrix device based on the ethernet switching technology of the present invention;
fig. 5 is a schematic flow chart of a service data switching and processing method according to an embodiment of the large-scale video display control matrix device based on the ethernet switching technology.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the relevant portions of the related inventions are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The utility model discloses a large-scale video display control matrix equipment based on Ethernet switching technology, including backplate, power, host system module, fan, quick-witted case, this video display control matrix equipment still includes one or more interface card, Ethernet switching unit, clock synchronization card, control card;
the interface card is used for receiving and processing external service data, and sending the processed external service data to the Ethernet switching unit at regular time and uniform speed based on the signal of the clock synchronization card; the Ethernet switching unit is also used for receiving, processing and outputting the data after switching configuration sent by the Ethernet switching unit; the external service data comprises video, audio and control data;
the Ethernet switching unit is used for copying and forwarding corresponding data based on switching configuration and a destination address;
the clock synchronization card is used for providing a group of clock signals and synchronization signals; the clock signal is used for internal timing of the interface card; the synchronous signal is used for regularly calibrating the internal timing of each module;
the control card is used for switching and configuring the Ethernet exchange unit, the input channel and the output channel of the interface card.
In order to clearly explain the large-scale video display control matrix device based on the ethernet switching technology of the present invention, the following description is made in conjunction with fig. 1.
The utility model relates to an embodiment's extensive video display control matrix equipment based on ethernet switching technique, including backplate, power, host system, fan, quick-witted case, this video display control matrix equipment still includes one or more interface card, ethernet switching unit, clock synchronization card, control card, each module detailed description as follows:
the interface card is used for receiving and processing external service data, and sending the processed external service data to the Ethernet switching unit at regular time and uniform speed based on a signal of the clock synchronization card; the Ethernet switching unit is also used for receiving, processing and outputting the data after switching configuration sent by the Ethernet switching unit; the external service data includes video, audio and control data.
At least one pair of high-speed bidirectional Serdes channels exist between the Ethernet switch card and the interface card, and the Serdes channels generally transmit 10GE, 25GE or 40GE Ethernet services, so that the bandwidth requirement of large-scale equipment can be met.
As shown in fig. 2, for the interface card structure diagram of an embodiment of the large-scale video display and control matrix device based on the ethernet switching technology of the present invention, the interface card supporting the input of the same kind and the output of the same kind is taken as an example for explanation, and the interface card includes an input interface, an output interface, a data processing module and a micro control module. The input interface is used for acquiring external service data; the output interface is used for outputting corresponding data sent by the Ethernet switching unit; the data processing module performs data segmentation, packing and packaging on external service data based on a control card configuration instruction acquired by the first micro control module; the first micro control module is used for acquiring a control card configuration instruction from the Ethernet switching unit, and performing service processing on the data to generate new service data; the first micro control module is used for forwarding the configuration instruction of the control card and configuring the Ethernet encapsulation module and the processing module in the data processing module.
"carry on the business processing to the data and turn into the new business data", its method is:
and performing one or more of image processing, sound processing and control instruction processing on the data to obtain new service data.
Each interface card is provided with a plurality of input and output channels for accessing external video, audio, control data and other service data streams, and the output channels are used for outputting one or more appointed processed service data to the outside, so that the required functions of the video display control equipment are realized.
The Ethernet switching unit is used for copying and forwarding corresponding data based on the switching configuration and the destination address.
The Ethernet switching unit comprises one or more Ethernet switching cards; as shown in fig. 3, for the utility model discloses ethernet switch card structure sketch map of a large-scale video display control matrix equipment embodiment based on ethernet switching technology, ethernet switch card includes ethernet switch chip, the little control module of second. The Ethernet switching chip is used for carrying large-scale data switching of equipment; the second micro control module is used for configuring the Ethernet switching chip.
The step of configuring the Ethernet switching chip comprises the following steps:
initializing, forwarding table, and multicasting table.
The ethernet switching chip needs to carry the switching of all data traffic of the device, and a chip with a large switching capacity and a high channel rate needs to be selected. At present, the switch chips with relatively large capacity have models of 128x10G, 256x25G, 512x50G, etc., and can be flexibly selected according to the total switch bandwidth plan of the device.
The clock synchronization card is used for providing a group of clock signals and synchronization signals; the clock signal is used for internal timing of the interface card; the synchronization signal is used to periodically calibrate the internal timing of each module.
As shown in fig. 4, for the utility model discloses clock synchronization card structural diagram of an embodiment of large-scale video display control matrix equipment based on ethernet switching technology to clock drive chip of clock signal output and clock drive chip of synchronous signal output of the same kind explain for the example all the way, and the clock synchronization card includes PLL clock chip, crystal oscillator, third micro control module, frequency division module, two clock drive chips. The PLL clock chip generates a clock signal by locking the crystal oscillator, and the frequency of the clock signal is configured by the third micro-control module; the clock signals distributed to the interface cards are generally transmitted over a long distance through the backplane, and a low clock frequency, such as 25MHz, is generally selected to reduce loss and external interference; the synchronous signal is a pulse signal with very low frequency, generally in Hz level, and is obtained by frequency division of a high-frequency clock; the clock driving chip improves the driving capability of the signal and ensures better signal quality when the signal reaches each interface card.
The control card is used for switching and configuring the Ethernet exchange unit and the input channel and the output channel of the interface card.
The control card and all the board cards are connected by an internal management channel, and the switching relation configuration between the input and output ports of all the interface cards is realized by the configuration of the interface cards and the exchange cards.
It should be noted that, the large-scale video display and control matrix device based on the ethernet switching technology provided in the foregoing embodiment is only illustrated by the division of the above functional modules, and in practical applications, the above functions may be allocated to different functional modules according to needs, that is, the modules in the embodiment of the present invention are decomposed or combined again, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the above described functions. The names of the modules involved in the embodiments of the present invention are merely for distinguishing the respective modules, and are not to be construed as limitations of the present invention.
The utility model discloses a business data exchange and processing method of second embodiment, as shown in fig. 5, based on foretell extensive video display and control matrix equipment based on ethernet switching technology, this method includes:
step S10, dividing the acquired external service data into data packets with fixed length, and adding sequence labels to the data packets respectively;
step S20, packaging the data packet added with the sequence label into an Ethernet data packet, generating a source address according to the position and the port of the current interface card, and generating a destination address according to the switching configuration;
step S30, based on the obtained synchronous signal, the Ethernet data packets are sent to the Ethernet switching unit in sequence according to the label at regular time and uniform speed;
step S40, the Ethernet exchange unit copies the corresponding Ethernet data packet and fills in the destination address according to the switching configuration, and forwards the Ethernet data packet according to the destination address;
step S50, the interface card receives the Ethernet data packet, and carries out data unpacking and caching according to the destination address sub-channel;
step S60, based on the sequence label of the data packet, the cached data packet is reordered to restore to the original service data;
and step S70, according to the configuration of the control card, performing one or more of image processing, sound processing and control instruction processing on the service data, generating and outputting new service data.
The present embodiment describes a basic process flow from input to output of a set of video services, and in practical applications, the cases of one input to multiple outputs, multiple inputs to one output, and multiple inputs to multiple outputs are all similar.
The service data enters the interface card service data processing module, the service data is firstly segmented into fixed length to be suitable for Ethernet transmission, the data packet length of 512 bytes or 1024 bytes is generally selected, and high-efficiency data transmission can be realized. Other fixed lengths can be selected to meet the requirements of different occasions, and the utility model discloses do not limit this. Sequence labels are added to the data packets to indicate the sequence, so that data recombination can be conveniently carried out after exchange. The data packet is packaged into an Ethernet data packet by adding a source address and a destination address, the source address is generated by the board card serial number and the service input channel number, and the destination address is generated according to the switching configuration of the control card and is used for identifying a certain channel number of the interface card to be accessed. Then, according to the synchronization information provided by the clock card, sending ethernet data packets to the ethernet switching unit at a regular speed, and meanwhile, sending the data packets to each switch card in turn to realize uniform and balanced data traffic of the switch cards, so that it can be ensured that congestion and packet loss do not occur when the data bandwidth is the maximum.
After receiving the data packet, the ethernet switching unit performs table lookup according to the destination address, and forwards the data packet to the corresponding interface card. The address table is configured by the control card, and when there is one input to multiple outputs, it can be identified from the special destination address, look up the multicast table, copy the data, then replace it with the appointed destination address, and forward it to the corresponding interface card.
The interface card output service data processing module receives Ethernet data packets from a plurality of switching cards and divides the Ethernet data packets into different service channels for caching according to destination addresses. And after the Ethernet packet header is removed, carrying out disorder rearrangement on the data packet according to the sequence label, and recovering the data packet into original service data. Then, according to the configuration of the control card, the image, sound and control aspects of the service data are processed, and a new service data stream is generated. And finally, outputting the data to corresponding external equipment.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and related descriptions of the method described above may refer to the corresponding process in the foregoing device embodiment, and are not described herein again.
The terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing or implying a particular order or sequence.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (6)
1. A large-scale video display control matrix device based on Ethernet switching technology comprises a back plate, a power supply, a main control module, a fan and a chassis, and is characterized by further comprising one or more interface cards, an Ethernet switching unit, a clock synchronization card and a control card;
the interface card is used for receiving and processing external service data, and sending the processed external service data to the Ethernet switching unit at regular time and uniform speed based on the signal of the clock synchronization card; the Ethernet switching unit is also used for receiving, processing and outputting the data after switching configuration sent by the Ethernet switching unit; the external service data comprises video, audio and control data;
the Ethernet switching unit is used for copying and forwarding corresponding data based on switching configuration and a destination address;
the clock synchronization card is used for providing a group of clock signals and synchronization signals; the clock signal is used for internal timing of the interface card; the synchronous signal is used for regularly calibrating the internal timing of each module;
the control card is used for switching and configuring the Ethernet exchange unit, the input channel and the output channel of the interface card.
2. The large-scale video display and control matrix device based on the Ethernet switching technology according to claim 1, wherein the interface card comprises one or more input interfaces, one or more output interfaces, a data processing module, a first micro control module;
the input interface is used for acquiring external service data;
the output interface is used for outputting corresponding data sent by the Ethernet switching unit;
the data processing module is configured to perform data segmentation, packing and packaging on the external service data based on a control card configuration instruction acquired by the first micro control module; the first micro control module is further configured to cache, sort and recombine the data from the Ethernet switching unit, and perform service processing on the data based on a control card configuration instruction acquired by the first micro control module to generate new service data;
the first micro control module is used for forwarding a configuration instruction of the control card and configuring the Ethernet packet module and the service processing module in the data processing module.
3. The large-scale video display and control matrix device based on the Ethernet switching technology according to claim 1, wherein the Ethernet switching unit comprises one or more Ethernet switching cards; the Ethernet switch card comprises an Ethernet switch chip and a second micro control module;
the Ethernet switching chip is used for carrying equipment large-scale data switching;
the second micro control module is used for configuring the Ethernet switching chip.
4. The large-scale video display and control matrix device based on the Ethernet switching technology according to claim 1, wherein the clock synchronization card comprises a PLL clock chip, a crystal oscillator, a third micro-control module, a frequency division module, and one or more clock driving chips;
the PLL clock chip generates a clock signal and a high-frequency clock by locking the crystal oscillator and based on the configuration of the third micro-control module;
the frequency division module is used for carrying out frequency division processing on the high-frequency clock to obtain a synchronous signal;
the clock driving chip is used for outputting clock signals and synchronous signals.
5. The Ethernet switching technology-based large-scale video display and control matrix device according to claim 4, wherein the clock signal frequency is lower than a set threshold.
6. The Ethernet switching technology based large scale video display and control matrix device of claim 3, wherein there is no less than one pair of high speed bidirectional Serdes channels between the Ethernet switch card and the interface card.
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