Large-scale video display and control matrix equipment based on Ethernet switching technology

Abstract

The present invention belongs to the field of video display and control technology, and specifically relates to a large-scale video display and control matrix device based on Ethernet switching technology, which aims to solve the problem that the existing technology cannot realize large-scale multi-channel video interconnection and switching. The present invention includes: one or more interface cards, which are used to distinguish channels for packet cutting, packetization, timed transmission, caching, reorganization, image processing, sound processing, and control processing of business data; Ethernet switching units copy and forward data based on switching configurations and data destination addresses; clock synchronization cards, which provide clock signals and synchronization signals; and control cards used to perform switching configurations between input channels and output channels of Ethernet switching units and interface cards. The total capacity of the device of the present invention can increase linearly with the number of switching chips used, and business data is processed in the form of data packets to distinguish channels, which can realize large-scale unimpeded and flexible data exchange, with high equipment flexibility and low data loss rate.

Description

Background Art

[0002] Video display and control equipment mainly includes video matrix and splicing processor. Video matrix refers to an electronic device that outputs m-channel video signals to n-channel monitoring equipment arbitrarily through array switching. Some video matrices also have audio switching functions, which can switch video and audio signals synchronously. This matrix is ​​also called video and audio matrix. At present, video matrices are divided into two categories in terms of their implementation methods: analog matrix and digital matrix. Video matrix is ​​generally used in various monitoring occasions. Video splicing controller is a professional video processing and control equipment. Its main function is to divide a video signal into multiple display units, output the divided display unit signals to multiple display terminals, and complete the splicing of multiple display screens to form a complete image. The processing process is completely hardware-based, and the video display process does not require computers and startup software operations, which is very simple.

[0003] In existing video display and control equipment, the interconnection and switching of the video service backplane is realized through the crosspoint chip. Each input port of the crosspoint is connected to an input video, and each output port is connected to an output video. By configuring the connection relationship between the input and output inside the chip, the switching connection and copy output of the video service are realized. Each input and output port of the crosspoint can only transmit one video service, which results in the maximum scale of the equipment being limited by the number of interfaces on the chip. The current equipment scale can no longer meet the needs of users, and a larger-scale equipment is urgently needed to realize the interconnection and switching of multiple videos. Summary of the invention

[0004] In order to solve the above-mentioned problem in the prior art, that is, the problem that the prior art cannot realize large-scale multi-channel video interconnection switching, the present invention provides a large-scale video display and control matrix device based on Ethernet switching technology, including a backplane, a power supply, a main control module, a fan, and a chassis. The video display and control matrix device also includes one or more interface cards, an Ethernet switching unit, a clock synchronization card, and a control card;

[0005] The interface card is used to receive and process external business data, and based on the signal of the clock synchronization card, sends the processed external business data to the Ethernet switching unit at a fixed time and uniform speed; it is also used to receive the data after switching configuration sent by the Ethernet switching unit, process and output; the external business data includes video, audio, and control data;

[0006] The Ethernet switching unit is used to copy and forward corresponding data based on the switching configuration and the destination address;

[0007] The clock synchronization card is used to provide a set of clock signals and synchronization signals; the clock signal is used for internal timing of the interface card; the synchronization signal is used to regularly calibrate the internal timing of each module;

[0008] The control card is used to perform switching configuration between the input channels and output channels of the Ethernet switching unit and the interface card.

[0009] In some preferred embodiments, the interface card includes one or more input interfaces, one or more output interfaces, a data processing module, and a first microcontroller module;

[0010] The input interface is used to obtain external business data;

[0011] The output interface is used to output the corresponding data sent by the Ethernet switching unit;

[0012] The data processing module is configured to perform data segmentation, packaging, and packetization on the external business data based on the control card configuration instructions obtained by the first microcontroller module; and is also configured to cache, sort and reorganize the data from the Ethernet switching unit, and perform business processing on the data to generate new business data based on the control card configuration instructions obtained by the first microcontroller module;

[0013] The first micro-control module is used to forward the configuration instructions of the control card and configure the Ethernet packet module and the service processing module in the data processing module.

[0014] In some preferred embodiments, the method of “performing business processing on data to generate new business data” is:

[0015] Perform one or more of image processing, sound processing, and control instruction processing on the data to obtain new business data.

[0016] In some preferred embodiments, the Ethernet switching unit includes one or more Ethernet switching cards; the Ethernet switching card includes an Ethernet switching chip and a second microcontroller module;

[0017] The Ethernet switching chip is used for large-scale data exchange of bearer devices;

[0018] The second micro-control module is used to configure the Ethernet switch chip.

[0019] In some preferred embodiments, “configuring the Ethernet switch chip” includes:

[0020] Initialization, forwarding table, and multicast table.

[0021] In some preferred embodiments, the clock synchronization card includes a PLL clock chip, a crystal oscillator, a third microcontroller module, a frequency division module, and one or more clock driver chips;

[0022] 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;

[0023] The frequency division module is used to perform frequency division processing on the high-frequency clock to obtain a synchronization signal;

[0024] The clock driving chip is used to output a clock signal and a synchronization signal.

[0025] In some preferred embodiments, the clock signal frequency is lower than a set threshold.

[0026] In some preferred embodiments, there is at least one pair of high-speed bidirectional Serdes channels between the Ethernet switch card and the interface card.

[0027] Another aspect of the present invention provides a method for exchanging and processing business data, based on the large-scale video display and control matrix device based on Ethernet switching technology, the method comprising:

[0028] Step S10, dividing the acquired external business data into data packets of fixed length, and adding sequence tags to the data packets respectively;

[0029] Step S20, encapsulating the data packet with the sequence tag added into an Ethernet data packet, generating a source address according to the position and port of the current interface card, and generating a destination address according to the switching configuration;

[0030] Step S30, based on the acquired synchronization signal, sending the Ethernet data packets in sequence to the Ethernet switching unit according to the labels at a regular and uniform speed;

[0031] Step S40, the Ethernet switching 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;

[0032] Step S50, the interface card receives the Ethernet data packet and performs data depacketization and buffering in different channels according to the destination address;

[0033] Step S60, reordering the cached data packets based on the sequence tags of the data packets to restore them to original service data;

[0034] Step S70, performing one or more of image processing, sound processing, and control instruction processing on the service data according to the configuration of the control card, generating new service data and outputting the new service data.

[0035] Beneficial effects of the present invention:

[0036] (1) The present invention is a large-scale video display and control matrix device based on Ethernet switching technology. The number of switching cards can be flexibly expanded according to the scale of the device. The total capacity of the device can increase linearly with the number of switching chips used. Data services are no longer limited by physical interfaces. Each external interface and each backplane interface can transmit multiple services. This greatly improves the number of services and total processing bandwidth of the device, and can meet the application needs of users in larger-scale scenarios.

[0037] (2) The large-scale video display and control matrix device of the present invention is based on Ethernet switching technology. Through FPGA, service data is divided into different channels for packet cutting, packet packaging, timed transmission, caching, reorganization, image processing, sound processing, and control processing. FPGA cooperates with the switching chip, and the exchange processing of video and other services is processed in the form of data packets. Each video, audio, and control service in each interface is distinguished in the form of channels and exchanged separately, realizing the exchange scheduling and processing of sub-service channels in the physical interface of the interface card, thereby improving the flexibility of the equipment.

[0038] (3) The large-scale video display and control matrix device based on Ethernet switching technology of the present invention performs synchronous processing on data sent by the interface card through a clock synchronization card, thereby eliminating the problem of burst bandwidth congestion and packet loss in Ethernet packet switching.

[0039] (4) The large-scale video display and control matrix device based on Ethernet switching technology of the present invention realizes the function of unimpeded and flexible switching from each input service port to each service output port of the device through the control card configuring the data packet address of the FPGA and the forwarding table and multicast table of the switching chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0041] Figure 1 It is a structural schematic diagram of a large-scale video display and control matrix device based on Ethernet switching technology of the present invention;

[0042] Figure 2 It is a schematic diagram of the interface card structure of an embodiment of a large-scale video display and control matrix device based on Ethernet switching technology of the present invention;

[0043] Figure 3 It is a schematic diagram of the structure of an Ethernet switch card of an embodiment of a large-scale video display and control matrix device based on Ethernet switching technology of the present invention;

[0044] Figure 4It is a schematic diagram of the clock synchronization card structure of an embodiment of a large-scale video display and control matrix device based on Ethernet switching technology of the present invention;

[0045] Figure 5 The present invention is a flowchart of a business data exchange and processing method of a large-scale video display and control matrix device based on Ethernet switching technology in one embodiment. DETAILED DESCRIPTION

[0046] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0047] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0048] A large-scale video display and control matrix device based on Ethernet switching technology of the present invention comprises a backplane, a power supply, a main control module, a fan, and a chassis. The video display and control matrix device also comprises one or more interface cards, an Ethernet switching unit, a clock synchronization card, and a control card;

[0049] The interface card is used to receive and process external business data, and based on the signal of the clock synchronization card, sends the processed external business data to the Ethernet switching unit at a fixed time and uniform speed; it is also used to receive the data after switching configuration sent by the Ethernet switching unit, process and output; the external business data includes video, audio, and control data;

[0050] The Ethernet switching unit is used to copy and forward corresponding data based on the switching configuration and the destination address;

[0051] The clock synchronization card is used to provide a set of clock signals and synchronization signals; the clock signal is used for internal timing of the interface card; the synchronization signal is used to regularly calibrate the internal timing of each module;

[0052] The control card is used to perform switching configuration between the input channels and output channels of the Ethernet switching unit and the interface card.

[0053] In order to more clearly explain the large-scale video display and control matrix device based on Ethernet switching technology of the present invention, Figure 1 Each module in the embodiment of the present invention is described in detail.

[0054] A large-scale video display and control matrix device based on Ethernet switching technology according to an embodiment of the present invention includes a backplane, a power supply, a main control module, a fan, and a chassis. The video display and control matrix device also includes one or more interface cards, an Ethernet switching unit, a clock synchronization card, and a control card. Each module is described in detail as follows:

[0055] The interface card is used to receive and process external business data, and based on the signal of the clock synchronization card, sends the processed external business data to the Ethernet switching unit at a regular and uniform speed; it is also used to receive the switched configured data sent by the Ethernet switching unit, process and output it; among which, the external business data includes video, audio, and control data.

[0056] There is at least one pair of high-speed bidirectional SerDes channels between the Ethernet switch card and the interface card. Generally, the SerDes channel transmits 10GE, 25GE or 40GE Ethernet services, which can meet the bandwidth requirements of larger-scale equipment.

[0057] like Figure 2 The figure shows a schematic diagram of the interface card structure of an embodiment of a large-scale video display and control matrix device based on Ethernet switching technology of the present invention. The interface card supporting one input and one output is used as an example for explanation, and includes an input interface, an output interface, a data processing module, and a micro-control module. Among them, the input interface is used to obtain external business data; the output interface is used to output the corresponding data sent by the Ethernet switching unit; the data processing module divides, packages, and encapsulates the external business data based on the control card configuration instructions obtained by the first micro-control module; it is also used to cache, sort and reorganize the data from the Ethernet switching unit, and perform business processing on the data based on the control card configuration instructions obtained by the first micro-control module to generate new business data; the first micro-control module is used to forward the configuration instructions of the control card, and configure the Ethernet packet module and the processing module in the data processing module.

[0058] "Performing business processing on data to generate new business data" is done as follows:

[0059] Perform one or more of image processing, sound processing, and control instruction processing on the data to obtain new business data.

[0060] Each interface card has multiple input and output channels for accessing external video, audio, control data and other business data streams. The output channel is used to output one or more specified processed business data to the outside, thereby realizing the functions required by the video display and control equipment.

[0061] The Ethernet switching unit is used to copy and forward corresponding data based on the switching configuration and the destination address.

[0062] The Ethernet switching unit includes one or more Ethernet switching cards; Figure 3 The figure shows a schematic diagram of the structure of an Ethernet switch card of an embodiment of a large-scale video display and control matrix device based on Ethernet switching technology of the present invention. The Ethernet switch card includes an Ethernet switch chip and a second micro-control module. The Ethernet switch chip is used to carry out large-scale data exchange of the device; and the second micro-control module is used to configure the Ethernet switch chip.

[0063] “Configuring the Ethernet switching chip” includes:

[0064] Initialization, forwarding table, and multicast table.

[0065] Ethernet switching chips need to carry all the data traffic of the device, so it is necessary to select chips with large switching capacity and high channel rate. Currently, the relatively large-capacity switching chips include 128x10G, 256x25G, 512x50G and other models, which can be flexibly selected according to the total switching bandwidth planning of the device.

[0066] The clock synchronization card is used to provide a set of clock signals and synchronization signals; the clock signal is used for internal timing of the interface card; the synchronization signal is used to regularly calibrate the internal timing of each module.

[0067] like Figure 4 As shown, it is a schematic diagram of the clock synchronization card structure of an embodiment of a large-scale video display and control matrix device based on Ethernet switching technology of the present invention. Taking a clock driver chip with one clock signal output and a clock driver chip with one synchronization signal output as examples, the clock synchronization card includes a PLL clock chip, a crystal oscillator, a third microcontroller module, a frequency division module, and two clock driver chips. Among them, 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 microcontroller module; the clock signal distributed to each interface card generally selects a lower clock frequency, such as 25MHz, because it has to be transmitted through a long distance backplane, in order to reduce loss and external interference; the synchronization signal is a pulse signal with a very low frequency, generally at the Hz level, and needs to be obtained by high-frequency clock division; the clock driver chip improves the driving ability of the signal to ensure that the signal can also guarantee a good signal quality when it reaches each interface card.

[0068] The control card is used to configure the switching between the input channels and output channels of the Ethernet switching unit and the interface card.

[0069] The control card and all the boards are connected by internal management channels. By configuring the interface cards and switch cards, the switching relationship configuration between the input and output ports of all the interface cards is realized.

[0070] It should be noted that the large-scale video display and control matrix device based on Ethernet switching technology provided in the above embodiment is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules in the embodiment of the present invention can be decomposed or combined. For example, the modules in the above embodiment can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules involved in the embodiments of the present invention are only for distinguishing the modules and are not regarded as improper limitations of the present invention.

[0071] A service data exchange and processing method according to a second embodiment of the present invention is as follows: Figure 5 As shown, based on the above-mentioned large-scale video display and control matrix device based on Ethernet switching technology, the method includes:

[0072] Step S10, dividing the acquired external business data into data packets of fixed length, and adding sequence tags to the data packets respectively;

[0073] Step S20, encapsulating the data packet with the sequence tag added into an Ethernet data packet, generating a source address according to the position and port of the current interface card, and generating a destination address according to the switching configuration;

[0074] Step S30, based on the acquired synchronization signal, sending the Ethernet data packets in sequence to the Ethernet switching unit according to the labels at a regular and uniform speed;

[0075] Step S40, the Ethernet switching 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;

[0076] Step S50, the interface card receives the Ethernet data packet and performs data depacketization and buffering in different channels according to the destination address;

[0077] Step S60, reordering the cached data packets based on the sequence tags of the data packets to restore them to original service data;

[0078] Step S70, performing one or more of image processing, sound processing, and control instruction processing on the service data according to the configuration of the control card, generating new service data and outputting the new service data.

[0079] This embodiment describes a basic processing flow from input to output of a group of video services. In actual applications, the situations of one input to multiple outputs, multiple inputs to one output, and multiple inputs to multiple outputs are similar.

[0080] The service data enters the service data processing module of the interface card, and the service data is first divided into fixed lengths to suit Ethernet transmission. Generally, a data packet length of 512 bytes or 1024 bytes is selected to achieve relatively efficient data transmission. Other fixed lengths can also be selected to meet the needs of different occasions, and the present invention does not limit this. The data packet needs to add a sequence label to indicate the order of precedence, so as to facilitate data reorganization after switching. The data packet is encapsulated as an Ethernet data packet by adding a source address and a destination address. The source address is generated by the board card sequence number and the service input channel number, and the destination address is generated according to the switching configuration of the control card, which is used to identify a certain channel number of the interface card to be sent. Then, according to the synchronization information provided by the clock card, the Ethernet data packet is sent to the Ethernet switching unit at a fixed time and uniform speed. At the same time, the data packet should be sent to each switching card in turn to achieve a uniform balance of the data flow of the switching card, so as to ensure that congestion and packet loss will not occur when the maximum data bandwidth is reached.

[0081] After receiving the data packet, the Ethernet switching unit will look up the table according to the destination address and forward the data packet to the corresponding interface card. The address table is configured by the control card. When there is one input to multiple outputs, it can identify the special destination address, look up the multicast table, copy the data, and then replace it with the specified destination address and forward it to the corresponding interface card.

[0082] The interface card output service data processing module receives Ethernet data packets from multiple switching cards and caches them in different service channels according to the destination address. After removing the Ethernet packet header, the data packets are rearranged according to the sequence label to restore the original service data. Then, according to the configuration of the control card, the service data is processed in terms of image, sound, and control to generate a new service data stream. Finally, it is output to the corresponding external device.

[0083] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related instructions of the method described above can refer to the corresponding process in the aforementioned device embodiment, and will not be repeated here.

[0084] The terms "first", "second", etc. are used to distinguish similar objects rather than to describe or indicate a particular order or sequence.

[0085] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0086] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A processing method for business data exchange of a large-scale video display and control matrix device based on Ethernet switching technology, wherein the large-scale video display and control matrix device based on Ethernet switching technology comprises a backplane, a power supply, a main control module, a fan, and a chassis, and is characterized in that: The large-scale video display and control matrix device also includes one or more interface cards, Ethernet switching units, clock synchronization cards, and control cards; The interface card is used to receive and process external business data, and based on the signal of the clock synchronization card, sends the processed external business data to the Ethernet switching unit at a fixed time and uniform speed; it is also used to receive the data after switching configuration sent by the Ethernet switching unit, process and output; the external business data includes video, audio, and control data; The Ethernet switching unit is used to copy and forward corresponding data based on the switching configuration and the destination address; The clock synchronization card is used to provide a set of clock signals and synchronization signals; the clock signal is used for internal timing of the interface card; the synchronization signal is used to regularly calibrate the internal timing of each module; The control card is used to perform switching configuration between the input channels and output channels of the Ethernet switching unit and the interface card; The method includes: Step S10, dividing the acquired external business data into data packets of fixed length, and adding sequence tags to the data packets respectively; Step S20, encapsulating the data packet with the sequence tag added into an Ethernet data packet, generating a source address according to the position and port of the current interface card, and generating a destination address according to the switching configuration; Step S30, based on the acquired synchronization signal, sending the Ethernet data packets in sequence to the Ethernet switching unit according to the labels at a regular and uniform speed; Step S40, the Ethernet switching 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 performs data depacketization and buffering in different channels according to the destination address; Step S60, reordering the cached data packets based on the sequence labels of the Ethernet data packets to restore them to the original service data; Step S70, performing one or more of image processing, sound processing, and control instruction processing on the service data according to the configuration of the control card, generating new service data and outputting the new service data.

2. The processing method for business data exchange of large-scale video display and control matrix equipment based on Ethernet switching technology according to claim 1 is characterized in that: The interface card includes one or more input interfaces, one or more output interfaces, a data processing module, and a first micro-control module; The input interface is used to obtain external business data; The output interface is used to output the corresponding data sent by the Ethernet switching unit; The data processing module is configured to perform data segmentation, packaging, and packetization on the external business data based on the control card configuration instruction acquired by the first microcontroller module; It is also configured to cache, sort and reorganize the data from the Ethernet switching unit, and perform business processing on the data based on the control card configuration instruction obtained by the first microcontroller module to generate new business data; The first micro-control module is used to forward the configuration instructions of the control card and configure the Ethernet packet module and the service processing module in the data processing module.

3. The processing method for business data exchange of large-scale video display and control matrix equipment based on Ethernet switching technology according to claim 2 is characterized in that: The method for processing data to generate new business data is as follows: Perform one or more of image processing, sound processing, and control instruction processing on the data to obtain new business data.

4. The processing method for service data exchange of large-scale video display and control matrix equipment based on Ethernet switching technology according to claim 1 is characterized in that: The Ethernet switching unit includes one or more Ethernet switching cards; the Ethernet switching card includes an Ethernet switching chip and a second micro-control module; The Ethernet switching chip is used for large-scale data exchange of bearer devices; The second micro-control module is used to configure the Ethernet switch chip.

5. The processing method for service data exchange of large-scale video display and control matrix equipment based on Ethernet switching technology according to claim 4 is characterized in that: Configuring the Ethernet switch chip includes: Initialization, forwarding table, and multicast table.

6. The processing method for service data exchange of large-scale video display and control matrix equipment based on Ethernet switching technology according to claim 1 is characterized in that: The clock synchronization card includes a PLL clock chip, a crystal oscillator, a third microcontroller module, a frequency division module, and one or more clock driver 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 to perform frequency division processing on the high-frequency clock to obtain a synchronization signal; The clock driving chip is used to output a clock signal and a synchronization signal.

7. The processing method for service data exchange of large-scale video display and control matrix equipment based on Ethernet switching technology according to claim 6 is characterized in that: The clock signal frequency is lower than a set threshold.

8. The method for processing service data exchange of a large-scale video display and control matrix device based on Ethernet switching technology according to any one of claim 4, characterized in that: There is at least one pair of high-speed bidirectional Serdes channels between the Ethernet switch card and the interface card.

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