WO2023092815A1 - Système et procédé de juxtaposition de multiples écrans d'entrée à multiples sources, et appareil d'affichage - Google Patents

Système et procédé de juxtaposition de multiples écrans d'entrée à multiples sources, et appareil d'affichage Download PDF

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WO2023092815A1
WO2023092815A1 PCT/CN2021/143157 CN2021143157W WO2023092815A1 WO 2023092815 A1 WO2023092815 A1 WO 2023092815A1 CN 2021143157 W CN2021143157 W CN 2021143157W WO 2023092815 A1 WO2023092815 A1 WO 2023092815A1
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video
module
interface
input
screen
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PCT/CN2021/143157
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English (en)
Chinese (zh)
Inventor
郭斌
付玉红
黄秋升
梁宁
鲁文怡
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康佳集团股份有限公司
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Publication of WO2023092815A1 publication Critical patent/WO2023092815A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/268—Signal distribution or switching
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus

Definitions

  • the present invention relates to the field of multi-screen display technology, in particular to a multi-source input multi-screen splicing system, method and display device.
  • the video input sources of these display terminals may come from one control system or multiple control systems of different models, such as Computers, video players, recording equipment, etc. If splicing is carried out by connecting multiple display terminals for independent display, due to the complex wiring of the system and the need for a large number of external devices, such as power supply, metal fixing frame, etc., the operation reliability is poor and the consumption cost is relatively high. high.
  • the purpose of the present invention is to provide a multi-source input multi-screen splicing system, method and display device to solve the problem of operational reliability caused by splicing by connecting multiple display terminals for independent display. Poor and high consumption costs.
  • a multi-screen splicing system with multi-source input which includes: several video input interfaces, a video storage module, a video output timing control module, several imaging modules, a splicing control module, an output selection module, a video output interface, and a display switching module;
  • the video input interface is used to receive a front-end video signal source;
  • the video signal source is an HDMI signal source or a DP signal source;
  • the video storage module is connected to the video input interface and the video storage module respectively The module is connected to store the video image decoded by the video signal source;
  • the video output timing control module is connected to the imaging module and the splicing control module respectively, and is used to generate a pixel clock and a pixel clock according to the current control parameters Timing, driving the imaging module to acquire video images from the video storage module;
  • the splicing control module is respectively connected to the video output timing control module and the output selection module, and is used for matching the current pixel timing according to the control parameters
  • the scanned position outputs
  • the video input interface receives the front-end video signal source
  • the video image decoded from the video signal source is stored in the video storage module
  • the video output timing control module according to the current control Parameter generation pixel clock and pixel timing drive the imaging module to acquire video images from the video storage module
  • the splicing control module outputs a judgment signal to the output selection module according to the control parameters and the position scanned by the current pixel timing
  • the output selection module conducts one of the imaging modules according to the judgment signal, and outputs the video image to the video output interface, which is output by the video output interface and displayed on a screen, so that the multi-channel Video sources are spliced and integrated to form one video source, which does not need to connect a large number of external devices, which improves operational reliability and reduces consumption costs.
  • the video image of the video input interface is superimposed and displayed on the preset area of the screen, so that the roaming display of a single video image on
  • the video input interface is an HDMI2.1 interface or a DP1.4 interface; the video input interface includes 16 video input interfaces, and the imaging module corresponds to the video input interface.
  • the video storage module includes: a video storage control unit and a video storage unit; the video storage control unit is respectively connected to the video input interface and the video storage unit, and is used to input the video The video images input by the interface are written into the video storage unit.
  • the display switching module is a button input switching module, and the video image is superimposed and displayed in the preset area of the preset screen by controlling the number of button inputs;
  • preset areas corresponding to video images of 16 video input interfaces are preset on the screen.
  • the video image of the first video input interface is separated from the original position and switched to the first preset area; when the number of key input is 2, the video image of the second video input The interface departs from the original position and switches to the second preset area; when the number of key input is N, the video image of the Nth video input interface leaves the original position and switches to the N preset area; when the number of key input When it is N+1, the display position of the video image from the first video input interface to the video image of the Nth video input interface is reset; wherein, N ⁇ 16.
  • the video image of the Nth video input interface is separated from the original position and switched to the first preset area; when the number of button input is 2, the video image of the Nth channel The video image of the video input interface deviates from the original position and switches to the second preset area; when the number of button inputs is N, the video image of the Nth video input interface deviates from the original position and switches to the Nth preset area ; When the number of button inputs is N+1, the display position of the video image from the first video input interface to the video image of the Nth video input interface is reset; wherein, N ⁇ 16.
  • the multi-screen splicing system with multi-source input further includes: a resolution calculation module and an image scaling module; wherein,
  • the resolution calculation module is respectively connected with the splicing control module and the image scaling module, and is used to drive the image scaling module and calculate the enlargement count factor or the reduction count factor required by the current pixel scanning position;
  • the image scaling module is used to modify the size of the video image according to the enlargement count factor or the reduction count factor.
  • the video output interface includes: a first video output interface and a second video output interface; wherein, the first video output interface is an HDMI2.1 interface or a DP1.4 interface; the second video output interface The output interface is V-by-One interface or LVDS interface.
  • the present invention also provides a multi-screen splicing method with multi-source input, which includes:
  • the video output timing control module generates pixel clock and pixel timing according to the current control parameters, and drives the imaging module to obtain video images from the video storage module;
  • the splicing control module outputs a judgment signal to the output selection module according to the control parameters and the position of the current pixel timing scan;
  • the output selection module turns on one of the imaging modules according to the judgment signal, and outputs the video image to the video output interface;
  • the video output interface outputs each video image and displays it on one screen
  • the display switching module outputs the button input command to superimpose and display the video image of the video input interface in the preset area of the screen.
  • the present invention also provides a display device, which includes the multi-screen splicing system with multi-source input as described above.
  • Fig. 1 is a system frame diagram of a multi-screen splicing system with multi-source input in the present invention.
  • Fig. 2 is a schematic diagram of splicing modes in which different video sources are displayed in different preset areas in an embodiment of the present invention.
  • Fig. 3 is a schematic diagram of a splicing mode in which the same video source is displayed in different preset areas in an embodiment of the present invention.
  • Fig. 4 is a schematic flow chart of the multi-screen splicing method with multi-source input in the present invention.
  • Video input interface 1. Video input interface; 2. Video storage control unit; 3. Video storage unit; 4. Imaging module; 5. Video output timing control module; 6. Splicing control module; 7. Output selection module; 8. First video output interface; 9. Second video output interface; 10. Display switching module; 11. Resolution calculation module; 12. Image scaling module.
  • the present invention provides a multi-source input multi-screen splicing system, method and display device.
  • the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
  • the present invention proposes a multi-source input multi-screen splicing system, method and display device.
  • the present invention supports up to 16 video input interfaces (supports HDMI2.1 and below protocols or DP1.4 and below protocols) , can realize any input source (one of 16 input sources, or multiple, or all) screen splicing, overlay, full-screen display, and finally through a video output interface (support HDMI2.1 and below protocol or DP1.4 and below protocol or V-By-One HS1.4 and below protocol or LVDS) to output the picture to a single large screen (including but not limited to LCD large-size liquid crystal display, LED splicing screen) for display.
  • HDMI2.1 and below protocols or DP1.4 and below protocols support HDMI2.1 and below protocol or DP1.4 and below protocol or V-By-One HS1.4 and below protocol or LVDS
  • the present invention supports user button control, satisfies real-time control to set the screen splicing mode, splicing order, and a single screen (window) as the main screen to be centered, prioritized, and highlighted, which provides convenience for users.
  • the present invention provides a preferred embodiment of a multi-screen splicing system with multi-source input.
  • a kind of multi-source input multi-screen splicing system comprises: several video input interfaces 1, video storage module, video output timing control module 5, several imaging modules 4, splicing control module 6.
  • Output selection module 7, video output interface and display switching module 10 wherein, the video input interface 1 is used to receive a front-end video signal source; wherein, the video signal source is an HDMI signal source or a DP signal source;
  • the video storage module is connected with the video input interface 1 and the video storage module respectively, and is used to store the video images decoded by the video signal source; the video output timing control module 5 is connected with the imaging module 4 respectively.
  • the splicing control module 6 is connected to generate pixel clock and pixel timing according to the current control parameters, and drive the imaging module 4 to obtain video images from the video storage module; the splicing control module 6 is respectively connected with the video
  • the output timing control module 5 is connected to the output selection module 7, and is used to output a judgment signal to the output selection module 7 according to the control parameters and the position of the current pixel timing scan; the output selection module 7 is connected to the imaging module 4 and the video output interface connection, for conducting one of the imaging modules 4 according to the judgment signal, and output the video image to the video output interface; the display switching module 10 is connected with the video output timing
  • the control module 5 is connected to superimpose and display the video image of the video input interface 1 in a preset area of the screen.
  • the video input interface 1 receives the video signal source of the front end (computer, video player, video recording device), for example, the video image decoded from the video signal source is stored in the video storage module, Thereafter, the video output timing control module 5 generates a pixel clock and pixel timing according to the current control parameters to drive the imaging module 4 to obtain video images from the video storage module, and the splicing control module 6 generates the pixel clock according to the current control parameters.
  • the position of the pixel timing scan outputs a judgment signal to the output selection module 7, and the output selection module 7 conducts one of the imaging modules 4 according to the judgment signal, and outputs the video image to the video output interface, by
  • the video output interface is output and spliced and displayed on one screen, so that multiple video sources are spliced and integrated into one video source without connecting a large number of external devices, which improves operational reliability and reduces consumption costs.
  • the video image of the video input interface 1 is superimposed and displayed in a preset area of the screen, so that a single video image can be displayed roamingly on the screen.
  • the video input interface 1 is an HDMI2.1 interface or a DP1.4 interface.
  • the video input interface 1, video storage module, video output timing control module 5, several imaging modules 4, splicing control module 6, output selection module 7, video output interface and display switching module 10 are integrated on the FPGA chip, Use the FPGA chip to decode the HDMI signal or DP signal (receiving end) or encoding (sending end), and complete the video image processing between the receiving end and the sending end. Because the FPGA chip has good programmability, the physical interface mode of the HDMI interface or DP interface can be flexibly adjusted according to actual needs. It should be noted that, in order to reduce costs, the present invention can also use an ASIC chip for video image processing between the receiving end and the sending end.
  • Described video input interface 1 comprises 16 road video input interfaces, promptly can support 16 road video input sources at most (interface uses HDMI2.
  • One, or multiple, or all) of the splicing of the picture is more widely used than the VGA/DVI interface, so the present invention can adapt to more application scenarios, and supports de-embedding audio signals from HDMI2.1 signals, with S /PDIF digital audio output interface.
  • the transmission rate of a single channel is as high as 48Gbps, and the bandwidth required to support 8K60Hz is ⁇ 48Gbps, so a single cable can meet the transmission of 8K60Hz video signals and support output display
  • the resolution is as high as 8K, and the output frame rate is as high as 120Hz. It does not need to compress or enlarge the video image, ensuring a real and low-latency display effect.
  • High-end FPGA devices with a transceiver speed greater than 12Gbps are used, and the FPGA logic speed needs to be able to run above 400MHz, and FRL decoding is performed on the parallel data output by the high-speed transceiver to obtain video image data.
  • the video storage module includes: a video storage control unit 2 and a video storage unit 3; the video storage control unit 2 is connected to the video input interface 1 respectively And the video storage unit 3 is connected to write the video image input by the video input interface 1 into the video storage unit 3 .
  • the video storage unit 3 is a DDR memory (DDR4 memory and below versions)
  • the video image input by the video input interface 1 is written into the DDR memory spontaneously by the video storage control unit 2
  • the FPGA passes through the first 1st to Nth (where N ⁇ 16) video input interface 1, receiving HDMI signal source or DP signal source from the front end (including but not limited to: computer, video player, video recording equipment), supporting asynchronous or synchronous input sources relation.
  • the internal logic in the FPGA decodes the image signals of N input sources according to a specific protocol (such as HDMI or DP), and the decoded image signals are spontaneously written into a specific location of the DDR memory through the video storage control unit 2, such as
  • the first video image data is written into the 1/N address space of the DDR memory
  • the second video image data is written into the 2/N address space of the DDR memory
  • the third video image data is written into the 3rd /N address space.
  • the video timing control module controls the imaging module 4 to read video images from the DDR memory and cache them temporarily.
  • each imaging module 4 corresponds to a video input interface 1
  • the video output timing control module 5 controls the imaging module 4 to read images from the first address space in the DDR memory, and controls the imaging module 4 to read images from the first address space in the DDR memory.
  • 2 Read the image in the address space, control the imaging module 4 to read the image from the Nth address space in the DDR memory, and the splicing control module 6 sends the judgment signal to the output selection below according to the splicing sequence and the position scanned by the current pixel timing Block 7 performs 1/N gating.
  • the display switching module 10 is a key input switching module, which controls video images to be superimposed and displayed in a preset area of a preset screen according to the number of key inputs.
  • preset areas corresponding to the video images of the 16-way video input interface 1 are preset on the screen.
  • the first video input interface to the Nth video input interface correspond to the predefined preset area A1-AN on the screen, N ⁇ 16, and the number of times of key input can control the video image of the video input interface in the preset area.
  • the area is superimposed and displayed first, so as to meet the real-time control setting screen splicing mode, splicing order, and a single screen (window) as the main screen to be centered, prioritized, and highlighted.
  • Different video sources are displayed in the splicing mode of different preset areas.
  • the number of key input is 1, the video image of the first video input interface will leave the original position and switch to the first preset area; when the number of key input is 1 2, the second video input interface leaves the original position and switches to the second preset area; when the number of button inputs is N, the video image of the Nth video input interface leaves the original position and switches to the Nth Preset area; when the number of key input is N+1, the display position of the video image from the first video input interface to the video image of the Nth video input interface is reset; wherein, N ⁇ 16.
  • the present invention supports the output of 8K pictures, so it supports the following three preferred applications: (1) 2x2 splicing mode, four 4K (3840x2160) splicing into one 8K picture. (2) 3x3 splicing method, 9 QHD (2560x1440) are spliced into an 8K picture. (3) 4x4 splicing method, 16 FHD (1920x1080) spliced into an 8K picture. It should be noted that the present invention still supports other settings, such as outputting 4K images, and the splicing method also supports a maximum of 4x4, which will not be described here.
  • the present invention can define EDID (Extended Display Identification Data) with default 8K resolution.
  • the video input source Sn when the user presses the button for the Nth (N ⁇ 16) time, the video input source Sn will leave the original position and switch to the preset An area for superimposed priority display (including but not limited to horizontal Center, Vertical Center).
  • the display positions of all video sources S1, S2, S3...S16
  • the same video source is displayed in the splicing mode of different preset areas, and when the number of button input is 1, the video image of the Nth video input interface is separated from the original position and switched to the first preset area; the button input When the number of times is 2, the video image of the Nth video input interface is out of the original position and switched to the second preset area; when the number of key input is N, the video image of the Nth video input interface is out of the original position, And switch to the Nth preset area; when the number of key input is N+1, the display position of the video image from the first video input interface to the video image of the Nth video input interface is reset; wherein, N ⁇ 16.
  • the video input source Sn when the user presses the button for the Nth (N ⁇ 16) time, the video input source Sn will leave the original position and switch to the preset An area for superimposed priority display. (5).
  • the display positions of all video sources (S1, S2, S3...S16) When the user presses the button for the N+1th time, the display positions of all video sources (S1, S2, S3...S16) will be reset (the display mode is the same as the zeroth button press). It should be noted that the present invention can flexibly set the display position of all video sources (S1, S2, S3...S16) to reset when the button is pressed for the Nth time according to the actual user scenario (the same as the display mode of the zeroth press of the button). same).
  • the multi-screen splicing system with multi-source input further includes: a resolution calculation module 11 and an image scaling module 12 .
  • the resolution calculation module is respectively connected with the mosaic control module 6 and the image scaling module 12, and is used to drive the image scaling module 12 and calculate the enlargement count factor or the reduction count factor required by the current pixel scanning position;
  • the image scaling module 12 is used to modify the size of the video image according to the enlargement count factor or the reduction count factor.
  • the resolution calculation module 11 After receiving the button input instruction (the zeroth press of the button, or the first press, or the second...Nth time), the resolution calculation module 11 will calculate the current pixel scanning position needs The enlargement count factor or reduction count factor: P ⁇ Q, where P represents the enlargement/reduction multiple of the video source in the horizontal direction, and Q represents the vertical enlargement/reduction multiple, such as 1x0.5, 2x1, 1x1.5, 0.5x2 .5, etc., and drive the image scaling module 12, the image scaling module 12 corrects the size of the original image according to the needs of the output screen resolution, and then displays the mosaic on a display screen through the video output interface Therefore, it can support one of the 16 input video sources, or multiple, or all images to be spliced, superimposed, and displayed in full screen on one video output interface to output the image.
  • the video output interface includes: a first video output interface 8 and a second video output interface 9; wherein, the first video output interface 8 is an HDMI2.1 interface or DP1. 4 interfaces; the second video output interface 9 is a V-by-One interface or an LVDS interface.
  • the present invention can also support video output interfaces whose output signals directly drive panel display, for example, V-by-One interface and LVDS interface.
  • the user can choose to use only the first video output interface 8 or the second video interface according to the actual application environment, and can use the first video output interface 8 and the second video output interface 9 at the same time.
  • the video content output by the two video interfaces is completely The same, that is, the pixel picture, resolution, and display frame rate are the same.
  • the present invention also provides a multi-screen splicing method with multi-source input, which includes steps:
  • the video output timing control module generates a pixel clock and pixel timing according to the current control parameters, and drives the imaging module to obtain video images from the video storage module;
  • the splicing control module outputs a judgment signal to the output selection module according to the control parameters and the position of the current pixel timing scan;
  • the output selection module turns on one of the imaging modules according to the judgment signal, and outputs the video image to the video output interface;
  • the video output interface outputs each video image and displays it on one screen
  • the display switching module outputs a button input instruction to superimpose and display the video image of the video input interface in a preset area of the screen.
  • the details are as described in the embodiment of a multi-screen splicing system with multi-source input, and will not be repeated here.
  • the present invention also provides a display device, which includes the above-mentioned multi-source input multi-screen splicing system.
  • a display device which includes the above-mentioned multi-source input multi-screen splicing system. The details are as described in the embodiment of a multi-screen splicing system with multi-source input, and will not be repeated here.
  • the latest HDMI2.1 high-speed protocol interface is added to the system.
  • the data transmission bandwidth of a single cable is as high as 48Gbps (the bandwidth required to support 8K60Hz is ⁇ 48Gbps), and a single cable can meet the transmission of 8K60Hz video signals. ;
  • the input end of the system supports up to 16 channels of HDMI (or DP) input. Compared with VGA/DVI interface, this type of interface is more widely used, so this system can adapt to more application scenarios;
  • Support P ⁇ Q scaling so it can support one of the 16 input video sources, or multiple, or all images to be spliced, superimposed, and displayed in full screen on one video output interface to output the image.

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Abstract

La présente invention concerne un système et procédé de juxtaposition de multiples écrans d'entrée à multiples sources, et un appareil d'affichage. Le système comprend : une interface d'entrée vidéo, qui est utilisée pour recevoir une source de signal vidéo d'une extrémité frontale ; un module de stockage vidéo, qui est utilisé pour stocker une image vidéo qui est décodée à partir de la source de signal vidéo ; un module de commande temporelle de sortie vidéo, qui est utilisé pour générer une horloge de pixel et une synchronisation de pixel selon le paramètre de commande courant et pour piloter un module d'imagerie pour acquérir l'image vidéo auprès du module de stockage vidéo ; un module de commande de juxtaposition, qui est utilisé pour délivrer un signal de détermination à un module de sélection de sortie selon le paramètre de commande et une position balayée à la synchronisation de pixel courante ; un module de sélection de sortie, qui est utilisé pour activer le module d'imagerie selon le signal de détermination et délivrer l'image vidéo à une interface de sortie vidéo ; et un module de commutation d'affichage, qui est utilisé pour reproduire l'image vidéo provenant de l'interface d'entrée vidéo d'une manière superposée dans une zone prédéfinie d'un écran. Au moyen de la présente invention, la fiabilité de fonctionnement d'une juxtaposition de multiples écrans est améliorée, les coûts consommés sont réduits et l'effet de l'affichage itinérant d'une seule image vidéo sur un écran est réalisé.
PCT/CN2021/143157 2021-11-24 2021-12-30 Système et procédé de juxtaposition de multiples écrans d'entrée à multiples sources, et appareil d'affichage WO2023092815A1 (fr)

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