CN112863425A - Multifunctional video splicing control device and LED display system - Google Patents
Multifunctional video splicing control device and LED display system Download PDFInfo
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- CN112863425A CN112863425A CN201911085265.5A CN201911085265A CN112863425A CN 112863425 A CN112863425 A CN 112863425A CN 201911085265 A CN201911085265 A CN 201911085265A CN 112863425 A CN112863425 A CN 112863425A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
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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
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
Abstract
The invention provides a multifunctional video splicing control device and an LED display system, which comprises: a video splicing processing decoding unit that receives an encoded signal from outside and performs decoding and video splicing processing; the LED screen control unit receives signals from the video splicing processing decoding unit and communicates with a controlled LED display screen; the video splicing processing decoding unit and the LED screen control unit are integrated into a whole and are connected through at least one group of interface channels. The invention aims to combine the functions of a decoding section of a splicing control system and an LED screen controller into a whole, changes the use mode of the traditional splicer and the screen controller, and can realize the splicing processing function of video signals and the output of RGB data groups by an integrally integrated multifunctional splicing controller, thereby reducing the complexity of system connection, reducing the coding and decoding processes of signals and greatly improving the signal delay phenomenon generated in the coding and decoding processing processes of the signals.
Description
Technical Field
The invention relates to the technical field of LEDs, in particular to a multifunctional video splicing control device and an LED display system.
Background
With the development of scientific technology, the small-distance LED display screen is widely applied to various places such as a smart city center, a traffic safety command center, an emergency management center and the like. In addition to these environments, the use of closely spaced LEDs in the military and aerospace fields is becoming more and more widespread, and the two environments have an important measure of the performance requirements of LED products, namely, the delay of the picture.
However, the front end of the existing LED products in the market needs to pass through a plurality of signal processing devices, so that a large delay is generated between the final projection screen display picture and the signal source, and the use requirements of the military industry and the aerospace field for the small-distance LED display screen cannot be met.
Content of application
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a multifunctional video stitching control device and an LED display system for solving the problems of the prior art.
To achieve the above and other related objects, a first aspect of the present invention provides a multifunctional video stitching control device, comprising: a video splicing processing decoding unit that receives an encoded signal from outside and performs decoding and video splicing processing; the LED screen control unit receives signals from the video splicing processing decoding unit and communicates with a controlled LED display screen; the video splicing processing decoding unit and the LED screen control unit are integrated into a whole and are connected through at least one group of interface channels.
In some embodiments of the first aspect of the present invention, the video stitching processing decoding unit comprises: the input interface module is used for inputting the coded signals; a video decoding module, coupled to the input interface module, for performing decoding processing on the encoded signal; and the image processing module is coupled with the video decoding module and is used for carrying out video splicing processing on the decoded signals.
In some embodiments of the first aspect of the present invention, the input interface module comprises a plurality of gigabit ports and a plurality of gigabit ports.
In some embodiments of the first aspect of the present invention, the LED screen control unit comprises: a display screen control module; and the output interface module is connected with the display screen control module and the control panel of the LED display screen so as to transmit the control signal of the display screen control module to the control panel of the LED display screen.
In some embodiments of the first aspect of the present invention, the output interface module includes a plurality of gigabit ports.
In some embodiments of the first aspect of the present invention, the multi-function video stitching control apparatus further comprises: and the main control module is respectively coupled with the video splicing processing decoding unit and the LED screen control unit so as to supply power to each unit.
In some embodiments of the first aspect of the present invention, the interface channel between the video stitching decoding unit and the LED screen control unit at least comprises: the video interface channels are used for transmitting video signals between the video splicing processing decoding unit and the LED screen control unit; and the at least one group of transparent transmission interface channels are used for carrying out network signal transmission between the video splicing processing decoding unit and the LED screen control unit.
In some embodiments of the first aspect of the present invention, the video stitching processing and decoding unit operates in a master mode, a transparent channel is reserved in an optical fiber channel, and the video stitching processing and decoding unit is connected to the LED screen control unit through an SPI interface; the LED screen control unit works in a slave mode, and an IP address is reserved for the LED screen control unit to be used as a communication address for communicating with the video splicing processing decoding unit.
To achieve the above and other related objects, a second aspect of the present invention provides an LED display system, which includes the multifunctional video mosaic control device provided by the first aspect of the present invention, and further includes: the video splicing processing and coding device is used for receiving a signal source and carrying out coding processing; the data interaction device is in communication connection with the video splicing processing and coding device and is used for transmitting coded signals; the multifunctional video splicing control device is in communication connection with the data interaction device and the controlled LED display screen, and is used for decoding signals, splicing videos and sending control signals to the LED display screen.
In some embodiments of the second aspect of the present invention, the video splicing processing encoding apparatus comprises a distributed splicing processor encoding end; the data interaction device comprises a switch.
As described above, the multifunctional video stitching control device and the LED display system of the present invention have the following advantages: the splicing control system aims to integrate the functions of a decoding section of the splicing control system and the LED screen controller, changes the using mode of the traditional splicer and the screen controller, and can realize the splicing processing function of video signals and the output of RGB data groups by the integrated multifunctional splicing controller, thereby reducing the complexity of system connection, reducing the coding and decoding processes of signals and greatly improving the signal delay phenomenon generated in the coding and decoding processing processes of the signals.
Drawings
Fig. 1 is a schematic structural diagram of an LED display system in the prior art.
Fig. 2 is a schematic structural diagram of an LED display system according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a multifunctional video stitching control device according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a multifunctional video stitching control device according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a multifunctional video stitching control device according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an LED display system according to an embodiment of the invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It is noted that in the following description, reference is made to the accompanying drawings which illustrate several embodiments of the present invention. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present invention. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present invention is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "above," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," "retained," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," and/or "comprising," when used in this specification, specify the presence of stated features, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions or operations are inherently mutually exclusive in some way.
Currently, the LED display screen has been widely used in many occasions in daily life due to its characteristics of high display brightness, seamless splicing, low power consumption, etc. In an LED display system, a video signal is changed into a signal recognizable by an LED, the signal processing is required for multiple times, a signal delay phenomenon is inevitably generated, and meanwhile, according to the difference of processing technologies, the signal delay is greatly different in height. In the application of military industry and aerospace field, the high requirement on signal delay causes that the current system is difficult to meet the use requirement of users.
For a large-scale LED display system, the LED display system is generally composed of an LED display system, a video signal splicing processing system and a signal source. The video signal splicing processing system can be divided into a centralized splicing processing system and a distributed splicing processing system. In the embodiment of the invention, the distributed splicing processing system is mainly improved.
As shown in fig. 1, a schematic diagram of a prior art LED display system is shown. In the prior art, a system topology structure of a whole set of LED display system is generally that a signal source 11 transmits a signal to a distributed splicing processor encoding end 12 of the distributed splicing processing system through a video cable, the distributed splicing processor encoding end 12 encodes the signal into a network signal, and then an exchanger 13 realizes data exchange, the exchanger 13 transmits the signal to a distributed splicing processor decoding end 14, the distributed splicing processor decoding end 14 decodes the network signal into a video signal, and transmits the video signal to an LED screen controller 15 through the video cable, and then transmits the video signal to an LED display screen 16 for on-screen display.
The signal source is processed by the encoding and decoding of the splicing processing system and the encoding and decoding of the LED screen controller, and inevitably generates signal delay. Generally, the coding delay of the existing splicing processor is about 5 frames or even higher, and the delay time of 5 frames is about 80ms according to that 1 frame is about 16.666 ms; the encoding and decoding delay time of the LED screen controller is about 2-3 frames, so that the delay time is about 32-48 ms; the delay time of the whole set of system after the two are superposed is about more than 120ms, so that the user requirements cannot be met, especially in the military industry and aerospace field with very high requirements on signal delay.
In view of this, the invention provides a comprehensive multifunctional video stitching control device and an LED display system, so as to solve the problem that the existing system is difficult to meet the requirement of a user on low signal delay, and to implement application of the LED display system in the aerospace field.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described in further detail below with reference to a plurality of embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
The present embodiment provides an LED display system, which includes: the device comprises a video splicing processing and encoding device, a data interaction device and a multifunctional video splicing control device. The video splicing processing and coding device is used for receiving a signal source and carrying out coding processing; the data interaction device is in communication connection with the video splicing processing and encoding device and is used for transmitting encoded signals; multifunctional video stitching control device the multifunctional video stitching control device is in communication connection with the data interaction device and the controlled LED display screen, and is used for decoding signals, performing video stitching processing and sending control signals to the LED display screen.
Fig. 2 is a schematic structural diagram of an LED display system according to an embodiment of the present invention. In this embodiment, the signal source 21 is encoded by the encoding end 22 of the distributed splicing processor and then transmitted to the switch 23, the switch 23 transmits the encoded signal source to the splicing processor 24 of the LED screen controller, and the processed signal is transmitted to the LED display 25 for on-screen display.
It should be noted that the multifunctional video splicing controller in this embodiment includes a video splicing processing sub-board and an LED screen control sub-board, and the two boards are connected through one or more sets of SPI interfaces; the multifunctional video splicing controller is control equipment integrating an LED screen controller and a decoding end of a distributed video splicer, a signal source can be directly displayed on a screen after being processed by a control splicing processor, and the times of coding and decoding are reduced, so that the delay between the signal source and the display signal of the LED display screen is greatly shortened. The specific structure of the multi-function video stitching controller will be explained in the following embodiments.
It should be understood that the above examples are provided for illustrative purposes and should not be construed as limiting. Likewise, the system may additionally or alternatively include other features or include fewer features without departing from the scope of the invention.
Example two
Fig. 3 is a schematic structural diagram of a multifunctional video stitching control device according to an embodiment of the present invention. The multifunctional video stitching control device 31 includes a video stitching processing decoding unit 311 and an LED screen control unit 312.
The video splicing processing decoding unit 311 receives coded signals from the outside and performs decoding and video splicing processing, and the LED screen control unit 312 receives signals from the video splicing processing decoding unit and communicates with the controlled LED display screen 32; the video stitching processing decoding unit 311 and the LED screen control unit 312 are integrated into a whole and connected through at least one set of interface channels.
For ease of understanding, the multifunctional video stitching control device will now be further described with reference to fig. 4. In fig. 4, the video splicing processing decoding unit is a daughter board 1, the LED screen control unit is a daughter board 2, and there are 4 video interfaces and 1 transparent transmission interface between the daughter board 1 and the daughter board 2; the video interface is used for video signal transmission between the daughter board 1 and the daughter board 2, and the transparent transmission interface is used for network signal transmission between the daughter board 1 and the daughter board 2.
Alternatively, the daughter board 1 operates in the master mode, and the daughter board 2 operates in the slave mode. The daughter board 1 reserves a 50Mbps transparent channel on the optical fiber channel, and is connected with the daughter board 2 through a group of standard SPI interfaces; the daughter board 1 reserves an IP address as a communication address of the daughter board 2.
Optionally, the daughter board 1 receives the encoded signal from the gigabit switch over a gigabit optical interface.
Optionally, the output level of the interface between the daughter board 1 and the daughter board 2 is a 3.3V CMOS, and each group of interfaces includes a channel associated clock and a group of 16-bit wide data buses.
Optionally, the interface between the daughter board 1 and the daughter board 2 is internally provided in a manner that the BT1120 implies a sync word, so as to save pins.
It can be seen from this that, by comparing the LED display systems in fig. 1 and 2: in the LED display system before improvement, a signal source can be displayed on a screen after being subjected to coding and decoding processing of a splicing processing system and coding and decoding processing of an LED screen controller, the number of signal processing times is large, and more signal delay is caused; in the improved LED display system, after a signal source reaches the multifunctional splicing controller, the signal source can be directly displayed on a screen only by carrying out coding and decoding processing once, the signal processing times are less, and the phenomenon of signal delay is greatly improved.
EXAMPLE III
Fig. 5 is a schematic circuit diagram of a multifunctional video stitching control device according to an embodiment of the present invention. The multifunctional video stitching control device of the embodiment comprises: the video display system comprises an input interface, a video decoder, an image processing circuit, an SPI interface channel, a display screen control card, a data set output interface and a main control circuit.
The input interface can be a gigabit network interface or a gigabit optical fiber interface, for example, four gigabit network interfaces and two gigabit optical fiber interfaces are selected, and the signal source can enter the multifunctional splicing control device in an IP code stream mode after being encoded by the encoding end. The video decoder is coupled to the input interface and used for decoding the encoded signal. The image processing circuit is coupled to the video decoder and used for performing video splicing processing on the decoded signals. SPI interface channel is coupled image processing circuit and display screen control card respectively, is the data channel between video concatenation processing decoding unit and the LED screen control unit. The display screen control card communicates with the control board of the controlled LED display screen to send relevant data to the control board. The data set output interface RGB data set output interface is a data channel connecting the display screen control card and the LED display screen control board, and may adopt, for example, 16 gigabit ports. The main control circuit is connected with the circuit components to supply power.
Example four
Fig. 6 is a schematic structural diagram of an LED display system according to an embodiment of the invention. The LED display system of the present embodiment includes: the video splicing system comprises a splicing processor encoding end, a tera optical switch and a multifunctional video splicing controller; the multifunctional video splicing controller comprises a daughter board 1 used for video splicing processing and decoding and a daughter board 2 used for LED screen control, wherein 4 groups of video interfaces and 1 group of transparent transmission interfaces are shared between the daughter board 1 and the daughter board 2; the video interface is used for video signal transmission between the daughter board 1 and the daughter board 2, and the transparent transmission interface is used for network signal transmission between the daughter board 1 and the daughter board 2.
Specifically, a signal source is coded by a coding end of a splicing processor and then transmitted to a tera optical switch, the tera optical switch transmits a coded signal to a daughter board 1 in a multifunctional video splicing controller, the daughter board 1 decodes the coded signal and transmits the coded signal to a daughter board 2 after video splicing processing, and the daughter board 2 generates a corresponding control signal after receiving the signal and transmits the control signal to a control board of an LED display screen through a gigabit network port so as to control the LED display screen.
In summary, the present invention provides a multifunctional video splicing control device and an LED display system, which aims to integrate the functions of the decoding section of the splicing control system and the LED screen controller into one, so as to change the usage of the traditional splicer and the screen controller, and the integrated multifunctional splicing controller can realize the splicing processing function of the video signal and the output of the RGB data set, thereby reducing the complexity of system connection, reducing the encoding and decoding processes of the signal, and greatly improving the signal delay phenomenon generated in the signal encoding and decoding processing processes. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A multi-functional video stitching control device, comprising:
a video splicing processing decoding unit that receives an encoded signal from outside and performs decoding and video splicing processing;
the LED screen control unit receives signals from the video splicing processing decoding unit and communicates with a controlled LED display screen;
the video splicing processing decoding unit and the LED screen control unit are integrated into a whole and are connected through at least one group of interface channels.
2. The control device according to claim 1, wherein the video stitching processing decoding unit includes:
the input interface module is used for inputting the coded signals;
a video decoding module, coupled to the input interface module, for performing decoding processing on the encoded signal;
and the image processing module is coupled with the video decoding module and is used for carrying out video splicing processing on the decoded signals.
3. The control device of claim 2, wherein the input interface module comprises a plurality of gigabit optical ports and a plurality of gigabit network ports.
4. The control device of claim 1, wherein the LED screen control unit comprises:
a display screen control module;
and the output interface module is connected with the display screen control module and the control panel of the LED display screen so as to transmit the control signal of the display screen control module to the control panel of the LED display screen.
5. The control device of claim 4, wherein the output interface module comprises a plurality of gigabit ports.
6. The control device according to claim 1, characterized by comprising:
and the main control module is respectively coupled with the video splicing processing decoding unit and the LED screen control unit so as to supply power to each unit.
7. The control device of claim 1, wherein the interface channel between the video stitching decoding unit and the LED screen control unit at least comprises:
the video interface channels are used for transmitting video signals between the video splicing processing decoding unit and the LED screen control unit;
and the at least one group of transparent transmission interface channels are used for carrying out network signal transmission between the video splicing processing decoding unit and the LED screen control unit.
8. The control device according to claim 7, characterized by comprising:
the video splicing processing decoding unit works in a main mode, a transparent channel is reserved in an optical fiber channel, and the video splicing processing decoding unit is connected with the LED screen control unit through an SPI (serial peripheral interface);
the LED screen control unit works in a slave mode, and an IP address is reserved for the LED screen control unit to be used as a communication address for communicating with the video splicing processing decoding unit.
9. An LED display system comprising the multifunctional video stitching control apparatus of claim 1, further comprising:
the video splicing processing and coding device is used for receiving a signal source and carrying out coding processing;
the data interaction device is in communication connection with the video splicing processing and coding device and is used for transmitting coded signals;
the multifunctional video splicing control device is in communication connection with the data interaction device and the controlled LED display screen, and is used for decoding signals, splicing videos and sending control signals to the LED display screen.
10. The system according to claim 9, wherein said video stitching process encoding means comprises a distributed stitching processor encoding side; the data interaction device comprises a switch.
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| CN113556483A (en) * | 2021-07-12 | 2021-10-26 | 中星电子股份有限公司 | Monitoring screen splicing system and splicing method |
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| CN208768188U (en) * | 2018-09-19 | 2019-04-19 | 深圳市唯奥视讯技术有限公司 | A kind of HD video ring goes out synchronous tiled device |
| CN209297726U (en) * | 2018-12-07 | 2019-08-23 | 西安诺瓦星云科技股份有限公司 | Display control card and display screen control system |
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| CN113556483A (en) * | 2021-07-12 | 2021-10-26 | 中星电子股份有限公司 | Monitoring screen splicing system and splicing method |
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