A complete large-screen splicing system, in addition to the front-end screen, also involves computers, networks, image monitoring, integrated wiring, and numerous peripheral devices. The large-screen splicing products are divided into display devices and image processing controllers, and the display devices are limited by the constraints of the core display component manufacturers (for example, DLP movements, LCD panels, etc.), and there is not much difference among the manufacturers. The ultimate difference in the functionality of a tiled display system is increasingly determined by the performance of the image processing controller system (including hardware and software).
For large-screen splicing products, we usually pay more attention to the display device, that is, the comparison between DLP and LCD splicing and PDP. From the aspect of product technology and application, each has its own advantages and disadvantages. There are various display features that can be selected based on the user's actual application needs. The realization of the overall display function of the splicing system, the image processing and control part of the system occupies an important role.
For image processing controller products, there are currently three types of image controllers: industrial controller PCI bus, hardware-only embedded, and distributed.
1. The PCI bus architecture IPC formula <br> <br> PCI bus controller IPC IPC is inserted into the input / output boards, industrial machine such as mature products generally use Evoc, Advantech, the image processing board on the market The card mainly uses several mainstream foreign manufacturers' products. The performance of the IPC determines the number of channels supported by the system and the stability. The performance of the image processing board determines the image quality. Its advantage is based on Windows or Linux system, can run the user's application program, can be directly used as a base mapper to achieve ultra-high resolution signal display; has a network screen capture function, can be connected to the user's computer, install screen-splitting client The software captures the screen display on the user's computer screen. The disadvantage is that the architecture of the PC plus the operating system has limited stability, prone to crashes and software failures; the number of signal inputs that can be supported by the IPC performance and slot limitations is limited, and the size of the large-screen splicing supported is limited; it is limited by the bus bandwidth. Due to the limited signal processing capability, it is difficult to achieve real-time display of all signals when multiple sources are simultaneously processed (especially computer sources and ultra-high resolution signals).
2. Embedded Controller Embedded controller uses <br> <br> full hardware design, the use of FPGA chip as the main image processing device, using a plate exchange for data exchange, to achieve image processing with embedded software. Image quality depends on the level of FPGA design, especially video signal processing (de-interlacing, Scaling, color, etc.), and the overall performance (unit windowing, frame rate, splicing scale) depends on the backplane switching capability. The advantage is that there is no need to run Windows/Linux operating system, there is no computer software virus problem; data processing real-time performance is better than PCI bus type, graphics processing board supports hot-swap, accidental power failure will not cause data loss, can withstand frequent Switch machine. The disadvantage is that it can only meet the simple system application of RGB/DVI signal and video signal acquisition and processing; it can not handle the network computer screen display; it can not handle the ultra-high resolution signal display, and it needs to use the bottom map machine. The basemap machine can be an industrial computer or the above PCI bus controller, insert a certain number of output boards, the user's application program runs on the IPC or PC controller, and the output signal is connected to multiple embedded controllers. Input port. This kind of controller also has the problem that it supports a limited number of signal inputs and supports a limited splicing scale.
3. <br> <br> distributed controller distributed architecture is a new graphics controller, network-based IP switching technology, the input and output signal acquisition processor independent, all of the signal processor via a standard network cable and CAT6 Switch connection. Image quality and overall performance (unit windowing, frame rate) depend on the signal processor chip and codec design level. The advantage is that all signals are distributed to each independent channel for processing and transmission, breaking the bottleneck of limited bandwidth and backplane switching capabilities of the PCI bus. All signals can be displayed in real time; the number of accessible signal sources and the large-screen splicing scale supported are almost Without limitation, it depends only on the size of the switch; signals can be transmitted over long distances, remotely distributed signal input and output display can be realized, and wiring is simple and reliable. The disadvantage is that the current price is high.
With the increase in the number of user-monitored signal sources, the increase in the size of large-screen splicing, and the higher requirements for display functions, IPCs and embedded controllers can be unsuccessful in some application environments, and the advantages of distributed image controllers are superior. Sexuality is more and more reflected. For example, in some monitoring centers, command halls and emergency command rooms will be built at the same time, as well as other meeting rooms, conference rooms, etc. Each place has its own display screen and its own signal source, requiring several places to use their respective signals independently. Sources and large screens can also be shared by all sources for call display and even display simultaneously. For this kind of application environment, the complicated switching, conversion equipment and huge cabling projects supported by IPCs and embedded controllers will be a headache for users and integrators. The distributed image controller with network architecture is undoubtedly a problem. The best choice.
Large-screen splicing is widely used in various fields. From the perspective of the global market, splicing wall technology development is increasingly becoming more specialized, systematic, and comprehensive solutions. Today, the large-screen splicing system has transitioned from a single display function to a multi-functional application era, satisfying users' needs for splicing systems in various fields. And these functions must be realized through the splicing processor, so there are insiders who compare the splicing processor to the soul of the entire splicing system. Only with the image control terminal, the system can be truly integrated.
For large-screen splicing products, we usually pay more attention to the display device, that is, the comparison between DLP and LCD splicing and PDP. From the aspect of product technology and application, each has its own advantages and disadvantages. There are various display features that can be selected based on the user's actual application needs. The realization of the overall display function of the splicing system, the image processing and control part of the system occupies an important role.
For image processing controller products, there are currently three types of image controllers: industrial controller PCI bus, hardware-only embedded, and distributed.
1. The PCI bus architecture IPC formula <br> <br> PCI bus controller IPC IPC is inserted into the input / output boards, industrial machine such as mature products generally use Evoc, Advantech, the image processing board on the market The card mainly uses several mainstream foreign manufacturers' products. The performance of the IPC determines the number of channels supported by the system and the stability. The performance of the image processing board determines the image quality. Its advantage is based on Windows or Linux system, can run the user's application program, can be directly used as a base mapper to achieve ultra-high resolution signal display; has a network screen capture function, can be connected to the user's computer, install screen-splitting client The software captures the screen display on the user's computer screen. The disadvantage is that the architecture of the PC plus the operating system has limited stability, prone to crashes and software failures; the number of signal inputs that can be supported by the IPC performance and slot limitations is limited, and the size of the large-screen splicing supported is limited; it is limited by the bus bandwidth. Due to the limited signal processing capability, it is difficult to achieve real-time display of all signals when multiple sources are simultaneously processed (especially computer sources and ultra-high resolution signals).
2. Embedded Controller Embedded controller uses <br> <br> full hardware design, the use of FPGA chip as the main image processing device, using a plate exchange for data exchange, to achieve image processing with embedded software. Image quality depends on the level of FPGA design, especially video signal processing (de-interlacing, Scaling, color, etc.), and the overall performance (unit windowing, frame rate, splicing scale) depends on the backplane switching capability. The advantage is that there is no need to run Windows/Linux operating system, there is no computer software virus problem; data processing real-time performance is better than PCI bus type, graphics processing board supports hot-swap, accidental power failure will not cause data loss, can withstand frequent Switch machine. The disadvantage is that it can only meet the simple system application of RGB/DVI signal and video signal acquisition and processing; it can not handle the network computer screen display; it can not handle the ultra-high resolution signal display, and it needs to use the bottom map machine. The basemap machine can be an industrial computer or the above PCI bus controller, insert a certain number of output boards, the user's application program runs on the IPC or PC controller, and the output signal is connected to multiple embedded controllers. Input port. This kind of controller also has the problem that it supports a limited number of signal inputs and supports a limited splicing scale.
3. <br> <br> distributed controller distributed architecture is a new graphics controller, network-based IP switching technology, the input and output signal acquisition processor independent, all of the signal processor via a standard network cable and CAT6 Switch connection. Image quality and overall performance (unit windowing, frame rate) depend on the signal processor chip and codec design level. The advantage is that all signals are distributed to each independent channel for processing and transmission, breaking the bottleneck of limited bandwidth and backplane switching capabilities of the PCI bus. All signals can be displayed in real time; the number of accessible signal sources and the large-screen splicing scale supported are almost Without limitation, it depends only on the size of the switch; signals can be transmitted over long distances, remotely distributed signal input and output display can be realized, and wiring is simple and reliable. The disadvantage is that the current price is high.
With the increase in the number of user-monitored signal sources, the increase in the size of large-screen splicing, and the higher requirements for display functions, IPCs and embedded controllers can be unsuccessful in some application environments, and the advantages of distributed image controllers are superior. Sexuality is more and more reflected. For example, in some monitoring centers, command halls and emergency command rooms will be built at the same time, as well as other meeting rooms, conference rooms, etc. Each place has its own display screen and its own signal source, requiring several places to use their respective signals independently. Sources and large screens can also be shared by all sources for call display and even display simultaneously. For this kind of application environment, the complicated switching, conversion equipment and huge cabling projects supported by IPCs and embedded controllers will be a headache for users and integrators. The distributed image controller with network architecture is undoubtedly a problem. The best choice.
Large-screen splicing is widely used in various fields. From the perspective of the global market, splicing wall technology development is increasingly becoming more specialized, systematic, and comprehensive solutions. Today, the large-screen splicing system has transitioned from a single display function to a multi-functional application era, satisfying users' needs for splicing systems in various fields. And these functions must be realized through the splicing processor, so there are insiders who compare the splicing processor to the soul of the entire splicing system. Only with the image control terminal, the system can be truly integrated.
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