WO2011127673A1 - 全彩led点阵上同时显示实时多画面的方法及装置 - Google Patents

全彩led点阵上同时显示实时多画面的方法及装置 Download PDF

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Publication number
WO2011127673A1
WO2011127673A1 PCT/CN2010/073326 CN2010073326W WO2011127673A1 WO 2011127673 A1 WO2011127673 A1 WO 2011127673A1 CN 2010073326 W CN2010073326 W CN 2010073326W WO 2011127673 A1 WO2011127673 A1 WO 2011127673A1
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image
output
real
unit
signal
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PCT/CN2010/073326
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English (en)
French (fr)
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林春育
高川
魏新刚
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深圳市创凯电子有限公司
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Publication of WO2011127673A1 publication Critical patent/WO2011127673A1/zh

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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] organic, e.g. using organic light-emitting diodes [OLED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/02Composition of display devices
    • G09G2300/026Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/08Details of timing specific for flat panels, other than clock recovery
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00Aspects of display data processing
    • G09G2340/10Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/02Graphics controller able to handle multiple formats, e.g. input or output formats
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/12Frame memory handling
    • G09G2360/121Frame memory handling using a cache memory
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00Aspects of data communication
    • G09G2370/12Use of DVI or HDMI protocol in interfaces along the display data pipeline
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00Aspects of data communication
    • G09G2370/20Details of the management of multiple sources of image data

Definitions

  • the invention is applied to simultaneously display multiple different real-time multi-picture signals on a full-color LED dot matrix that requires multiple transmission card support.
  • the price of full-color LED display is declining, and the direct spacing of the dot matrix is more dense. It is developed from the original P12 to P6 and P4. As the LED dot pitch is reduced, the number of LED dots required for display per unit area is increasing. The bigger the LED display is, whether it is indoor or outdoor, the direction of ultra-long, ultra-wide, super-large dot matrix, LED display screen composed of small dot matrix box gradually develops to 2048 X 1536, or even higher dot matrix. The horizontal lattice is over 10,000 points and the vertical lattice is greater than 1536 points.
  • the display of LED full-color screen is mainly composed of LED display screen, transmission card, several receiving cards, and computer and signal playing source for controlling display.
  • the basic system that constitutes the LED display consists of a single transmission card connecting several receiving cards to multiple transmitting cards to connect more receiving cards.
  • the performance requirements for the card processing and data transmission of the display screen become very high.
  • the large dot matrix LED display screen the traditional LED display screen supported by the computer + sending card method, the signal playing source is installed on the computer, the LED studio software is used for playing, and the DVI is collected by the sending card system. The corresponding dot matrix sent by the signal is transmitted, and the receiving system drives the corresponding LED lamp to realize the normal display of the picture.
  • the object of the present invention is to provide a method and a device for simultaneously displaying real-time multi-picture on a full-color LED dot matrix, which can realize: 1. Solving video signal segments of different formats and simultaneously adopting DVI real-time superimposed display output to achieve a crossover The send card displays the full LED picture. 2 Solve the problem of display misalignment of different LED display units.
  • the method for implementing the present invention is:
  • the method of simultaneously displaying real-time multi-picture on a full-color LED dot matrix includes multi-picture dynamic image real-time control and synchronous control display, including:
  • the external different format (HD/VGA/video signal) video signal is superimposed into a digital image signal through a multi-picture dynamic image real-time control unit;
  • the multi-picture dynamic image real-time controller receives the externally input video signal, and completes Real-time superposition processing, synthesizing one digital image signal simultaneously transmitted through digital image transmission bus Give different synchronization control display units;
  • the digital image signals superimposed in one way in real time are simultaneously transmitted to a plurality of synchronous control display units via the digital image transmission bus, and the numbers output by different synchronous control display units are realized through image block capture, image synchronization adjustment, image coding output.
  • the image signal is fully synchronized.
  • the method also includes:
  • the synchronous control display comprises a digital image signal of the multi-screen dynamic image real-time control unit received by the image block grabbing unit, and the corresponding size digital image is captured and sent to the synchronization adjusting unit according to the software setting, and the synchronization adjusting unit receives the image block grabbing.
  • the digital image is adjusted to standard resolution and adjusts the output time of the output digital image signal of the unit with reference to the synchronous control of the input digital image signal, so that the digital image signals output by the different synchronous control display units are completely synchronized, and then the image encoding output unit
  • the code sync adjustment unit digital image signal is output to the standard DVI signal to the LED display supported by the transmit/receive card system.
  • Step 1 The output of different synchronous display control units strictly locks the digital output of the multi-picture dynamic image real-time control The field synchronization signal of the image signal; the second step: the field synchronization delay of the output of the different display control unit is adjusted according to the position of the input signal; wherein, the first field midfield synchronization locking method comprises the following three methods: a, when the input field is synchronized When coming, the output field synchronization changes immediately; b. When the input field synchronization arrives, the output field synchronization selects the point change with the shortest interval time in the previous row or the next row of the display; c.
  • the apparatus comprises a multi-picture dynamic image real-time controller and a synchronous control display unit, wherein the multi-picture dynamic image real-time controller receives the externally input video signal and is connected to the synchronous control display unit via the transmission bus, wherein
  • the synchronization control display unit includes an image segmentation capture unit, a synchronization adjustment unit, and an image coding output unit, wherein the transmission bus is connected to the image coding output unit via the image segmentation capture unit and the synchronization adjustment unit.
  • the apparatus further includes: the image block grabbing unit is mainly composed of an 80186 controller and a video signal input module connected thereto, wherein the 80186 controller receives an external control information setting corresponding register to accurately cut the input number.
  • the image signal, the set register includes the size of the cropping, the position information, and the video signal input module receives the number consisting of CLK, chaotic HS, VS, RIN[7:0], GIN[7:0], BIN[7:0]
  • the image signal determines the resolution of the input digital image signal by searching the corresponding mode table through the DEN, HS, and VS sync signal frequencies.
  • the synchronization adjustment unit is mainly composed of a DSP processing module and two memories connected thereto, and completes image buffering, size adjustment, and output synchronization precise control, and the adjusted image is synchronized by CLKIN, IVS, IHS, IDEN. Clock signal, INBE [2: 9], INGE [2: 9], INRE [2: 9] The image signal is output to the image code output unit.
  • the image encoding output unit comprises a TTL to DVI chip, and receives a TTL digital image signal output by the synchronization adjusting unit, the signal comprising CLKIN, IVS, IHS, IDEN synchronous clock signal, INBE [2:9], INGE [2: 9], INRE [ 2: 9] image signal, converted to TMDS signal by TFP to D - TX2p, D_TX2m, D - ⁇ 1 ⁇ , D_TXlm, D - TX0p, D_TX0m, D - TXCp, D - TXCm four pairs of differential signals, through
  • the P3 DVI-I is output to the LED screen display.
  • the invention has the beneficial effects of: realizing a plurality of video signals of different formats to be outputted through the standard DVI format on the large LED display unit, and realizing synchronous display of the LED dot matrix across different transmission cards.
  • Figure 1 is a block diagram showing the overall principle of the present invention.
  • FIG. 2 is a flow chart of software processing of the present invention.
  • FIG 3 is a schematic diagram of the image block grab unit circuit 21 of Figure 1.
  • FIG. 4 is a circuit schematic diagram of the synchronization adjusting unit 22 of FIG. 1.
  • FIG. 5 is a circuit schematic diagram of the image encoding output unit 23 of FIG. 1.
  • the present invention is composed of a multi-picture dynamic image real-time controller 1 and a synchronous control display unit 2 (the present invention may have a plurality of synchronous control display units according to actual needs).
  • the multi-picture dynamic image real-time controller 1 receives externally different format video signals (including high-definition/VGA/video signals) and superimposes them into one digital image signal in real time, and simultaneously transmits a plurality of synchronous control display units through the digital image transmission bus (different synchronous control displays) The composition and working principle of the unit are the same, and one of them is selected below.)
  • the synchronization control display unit 2 includes an image block capture unit 21, a synchronization adjustment unit 22, and an image coding output unit 23.
  • the image block grabbing unit 21 receives the digital image signal of the multi-picture moving image real-time controller 1, and captures the digital image of the corresponding size according to the software setting and sends it to the synchronization adjusting unit 22, and the synchronization adjusting unit 22 receives the image blocking and capturing unit 21. Adjusting to standard resolution and adjusting the output time of the output digital image signal of the unit with reference to the synchronous control of the input digital image signal, so that the digital image signals output by the different synchronous control display units are completely synchronized, and the image encoding output unit 23 encodes the synchronization adjusting unit.
  • the 22 digital image signal is output to the LED display as a standard DVI signal.
  • the synchronous control display unit 2 includes an image block grabbing unit 21, a sync adjusting unit 22, and an image encoding output unit 23.
  • the image block grabbing unit 21 receives the digital image signal of the multi-picture moving image real-time controller 1, and captures the digital image of the corresponding size according to the software setting and sends it to the synchronization adjusting unit 22, and the synchronization adjusting unit 22 receives the image blocking and capturing unit 21. Adjusting to standard resolution and adjusting the output time of the output digital image signal of the unit with reference to the synchronous control of the input digital image signal, so that the digital image signals output by different synchronous control display units are completely the same.
  • the overall structure is as shown in FIG. 1, and includes a multi-picture dynamic image real-time controller 1 and a multi-channel synchronous control display unit 2.
  • the workflow of the main components of the present invention receives the externally input video signal, completes the real-time superposition processing, and synthesizes one digital image signal simultaneously transmitted to different synchronous control display units through the digital image transmission bus.
  • the synchronization control display unit 2 includes an image segmentation grabbing unit 21, a synchronization adjusting unit 22, and an image encoding output unit 23.
  • the image block capture unit 21 receives the digital image signal of the multi-picture dynamic image real-time controller 1, and captures the digital image of the corresponding size according to the software setting and sends it to the synchronization adjustment unit 22, and the synchronization adjustment unit 22 receives the image block capture unit 21.
  • the signal is adjusted to standard resolution and adjusts the output time of the output digital image signal of the unit with reference to the synchronous control of the input digital image signal, so that the digital image signals output by the different synchronous control display units are completely synchronized, and the image encoding output unit 23 encodes the synchronization.
  • the digital image signal of the adjustment unit 22 is output to the LED display screen as a standard DVI signal.
  • the main function of the image block grabbing unit 21 is to receive the digital image signal of the multi-picture dynamic image real-time controller 1, and cut the corresponding position image of the complete digital image signal according to the grab size set by the software and send it to the latter unit for processing.
  • the image block grabbing unit 21 is composed of a controller of the enhanced 80186 architecture and a video signal input module.
  • the video signal input module of the image block capture unit 21 receives a digital image signal consisting of CLK, DEN, HS, VS, RIN [7:0], GIN [7:0], BIN [7:0], and passes DEN.
  • the HS, VS sync signal frequency determines the resolution of the input digital image signal by looking up the corresponding mode table.
  • the 80186 controller receives the external control information to set the corresponding register to accurately crop the input digital image signal.
  • the set register includes the cropped size. , location and other information.
  • the synchronization adjustment unit 22 is composed of a high-performance DSP processing module, and cooperates with two external high-speed memories to complete image buffering, size and position adjustment, and output synchronization and precise control.
  • the DSP processing module storage bus width is 32-bit RMD [31: 0], and the overall bandwidth is 6. 4 Gbit/s.
  • the synchronization adjustment unit 22 adopts a unique display frequency control technology to achieve accurate and consistent output synchronization signals of different display units.
  • the specific implementation is completed in two steps.
  • the output of the different synchronous display control unit in the first step strictly locks the field synchronization signal of the digital image signal output by the multi-picture dynamic image real-time controller 1.
  • the second step is different display control
  • the field sync delay of the unit output is adjusted accordingly according to the position of the input signal.
  • the first step of the midfield sync locking method can be implemented in three ways. 1. When the input field synchronization arrives, the output field sync changes immediately. 2. When the input field sync arrives, the output field sync selects the point change with the shortest interval in the previous or next line of the display. 3.
  • the second step needs to be based on the first step. It must be ensured that the output frequency of each synchronous display control unit is a significant phase difference and needs to be controlled within one line of display time.
  • the above three frequency locking methods can fully satisfy this requirement, because the position of the input digital image capture by each synchronous display control unit is different, so the output time is also different, so as to ensure the output to each
  • the LED display unit forms a complete picture in the same frame, so it is necessary to delay output of the unit under the overall image in the display area, that is, adjust the field synchronization of the output field synchronization (IVS) and the input digital image (VS in the image Multi-screen dynamic image real-time control of the relative delay of grab 21).
  • the adjusted image is output to the image code output unit 23 by the CLKIN, IVS, IHS, IDEN synchronous clock signals, INBE [2:9], INGE [2:9], INRE [2:9] and the like.
  • the image encoding output unit 23 is composed of a TTL to DVI chip, and the encoded output of the complete digital image is displayed on the LED screen.
  • This unit uses the TFP410 dedicated image conversion chip to receive the TTL digital image signal output by the synchronization adjustment unit 22, which includes CLKIN, IVS, IHS, IDEN synchronous clock signals, INBE [2: 9], INGE [2: 9] , INRE [2: 9] and other image signals.
  • the four pairs of differential signals converted to TMDS signals by DFP are D_TX2p, D_TX2m, D_TXlp, D_TXlm, D_TX0p, D_TX0m, D-TXCp, D-TXCm are output through P3 DVI-I.

Description

全彩 LED点阵上同时显示实时多画面的方法及装置 技术领域
本发明应用于需要多张发送卡支持的全彩 LED点阵上同时显示多路不同的实时多 画面信号。
背景技术
全彩 LED显示屏的价格不断下降,点阵直接的间距原来越密,由原来的 P12往 P6,P4 发展, 随着 LED点距的縮小,单位面积显示时所需要的 LED点阵数量越来越大,无论室内 还是户外 LED显示,,朝着超长、超宽、超大点阵的方向发展, 由小点阵箱体构成的 LED 显示屏幕逐渐往 2048 X 1536, 甚至更高的点阵发展, 横向点阵超高 10000点, 纵向点阵 也大于 1536点。 LED全彩屏幕的显示主要由 LED显示屏、发送卡、若干块接收卡以及 控制显示的计算机和信号播放源四个部分组成。 随着 LED全彩屏幕的发展, 构成 LED 显示的基本系统由一张发送卡连接若干接收卡向多张发送卡连接更多的接收卡构成。在 需要用 LED大屏幕实现实时动态全彩显示时, 对显示屏发送卡处理和传输数据的性能 要求会变得很高。 在超大点阵 LED显示屏幕的发展过程中, 传统基于电脑 +发送卡的 方式来支持的 LED显示屏幕,将信号播放源安装在电脑上,采用 LED演播室软件进行播 放,通过发送卡系统采集 DVI信号过来的相应的点阵进行传送,接收系统接收后驱动对应 的 LED灯来实现画面的正常显示,. 随着 LED点阵越来越大, 一块超大的 LED屏幕往往 需要多张发送卡来分部分采集信号源,通过电脑级联的方式, ,局面采集,分段发送来实现 显像. 这种驱动超大点阵 LED显示的方式,具备很多局限包括, 主要表现在: i. 传统的显示支持方式,在实现超大点阵显示时, 需要多台电脑分别支持多张 发送卡来实现, 系统采用级联方式进行, 连接复杂, 只有一台电脑出现系统 崩溃, 导致这个显示屏幕不能正常运行。
U. 不同电脑与发送卡之间需要复杂的系统参数设置,一旦电脑中毒,重装系统 后, 需要重新对显示系统进行调试和设置。 iii. 不能同时进行不同信号的实时处理,不能对不同信号进行同步实时显示,或 者即使实现了其方法也非常复杂。 iv. 能实现多路不同的信号源同时在多张发送卡上显示,只能实现一路信号的显 像。 v. 不能满足超大屏幕 LED显像时, 对不同情况下, 不同显示场景模式的预设 功能。 vi. 如果要实现多个信号同时显像,通过采用电脑采集的方式进行,这样电脑采集 的所有信号只能在本机所支持的发送卡上显示,不能跨发送卡显示。 发明内容
本发明的目的是提供一种全彩 LED点阵上同时显示实时多画面的方法及装置, 可 以实现: 1. 解决各类不同格式的视频信号分段同时采用 DVI实时叠加显示输出, 实现 跨越多张发送卡显示完整 LED画面。 2解决不同 LED显示单元的显示不同步问题。
实现本发明的方法是: 全彩 LED点阵上同时显示实时多画面的方法包括多画面动 态图像实时控制和同步控制显示, 其中包括:
A.将外部的不同格式 (高清 /VGA/视频信号)视频信号经多画面动态图像实时控制单 元, 实现实时叠加为一路数字图像信号; 多画面动态图像实时控制器接收外部输入的视 频信号, 完成实时的叠加处理, 合成一路数字图像信号通过数字图像传输总线同时传输 给不同的同步控制显示单元;
B. 将实时叠加为一路的数字图像信号经数字图像传输总线同时传送给多个同步控 制显示单元, 经图像分块抓取、 图像同步调整、 图像编码输出, 实现不同同步控制显示 单元输出的数字图像信号完全同步。
该方法还包括:
所述同步控制显示包括图像分块抓取单元接收多画面动态图像实时控制单元的数 字图像信号, 根据软件设置抓取相应大小的数字图像送给同步调整单元, 同步调整单元 接收图像分块抓取的数字图像,调整为标准分辨并参照输入的数字图像信号的同步控制 调整本单元的输出数字图像信号的输出时间, 实现不同同步控制显示单元输出的数字图 像信号完全同步, 再经图像编码输出单元编码同步调整单元数字图像信号为标准 DVI 信号输出到由发送卡 /接收卡系统支持的 LED显示屏。
所述采用显示频率控制技术, 实现不同显示单元的输出同步信号精确一致, 具体实 施分为两步完成, 第一步: 不同的同步显示控制单元的输出严格锁定多画面动态图像实 时控制输出的数字图像信号的场同步信号; 第二步: 不同显示控制单元输出的场同步延 迟根据输入信号的位置相应调整; 其中, 第一步中场同步锁定方法包括以下三种方式: a、 当输入场同步到来时, 输出场同步立即变化; b、 当输入场同步到来时, 输出场同步 在显示的前一行或是后一行中选取间隔时间最短的点变化; c、 当输入场同步到来时, 输出场同步在当前行显示完以后变化。 实现本发明的装置是: 这种装置包括多画面动态图像实时控制器和同步控制显示单 元,其中多画面动态图像实时控制器接收外部输入的视频信号并经传输总线与同步控制 显示单元连接, 其中同步控制显示单元包括图像分块抓取单元、 同步调整单元和图像编 码输出单元, 其中传输总线经图像分块抓取单元、 同步调整单元与图像编码输出单元连 接。 该装置还包括: 所述图像分块抓取单元主要由一颗 80186控制器和与之连接的视频信号输入模块组 成, 其中 80186控制器接收外部的控制信息设置对应的寄存器来精确裁剪输入的数字图 像信号,设置的寄存器包括裁剪的大小、位置信息,视频信号输入模块接收由 CLK、亂 HS、 VS、 RIN[7 : 0]、 GIN[7 : 0]、 BIN[7: 0]组成的数字图像信号, 通过 DEN、 HS、 VS同步 信号频率查找相应的模式表判断输入数字图像信号的分辨率。
所述同步调整单元主要由一颗 DSP处理模块和与之连接的两颗存储器组成,完成图 像的缓存、 大小位置的调整、 输出同步精确控制, 调整后的图像通过 CLKIN、 IVS、 IHS、 IDEN同步时钟信号, INBE【2: 9】、 INGE【2: 9】、 INRE【2: 9】 图像信号输出到图像编 码输出单元。 所述图像编码输出单元包括一颗 TTL转 DVI芯片,接收同步调整单元输出的 TTL数 字图像信号, 该信号包含 CLKIN, IVS、 IHS、 IDEN同步时钟信号, INBE [ 2: 9】、 INGE 【2: 9】、 INRE [ 2: 9】图像信号,通过 TFP转换为 TMDS信号为 D— TX2p、 D_TX2m, D— ΤΧ1ρ、 D_TXlm, D— TX0p、 D_TX0m, D— TXCp、 D— TXCm四对差分信号, 通过 P3 DVI-I座输出给 LED 屏幕显示。 本发明具有的有益效果: 实现多个不同格式的视频信号在超大 LED显示单元上分 段通过标准 DVI格式输出, 达到跨越不同的发送卡驱动 LED点阵实时同步显示。 附图说明
图 1 是本发明的整体原理框图。
图 2 是本发明的软件处理流程图。
图 3 是图 1的图像分块抓取单元电路 21原理图。
图 4 是图 1的同步调整单元 22电路原理图。 图 5是图 1的图像编码输出单元 23电路原理图。
具体实施方式
下面结合附图对本发明作进一步说明:
本发明由多画面动态图像实时控制器 1和同步控制显示单元 2 (本发明根据实际需 要可以有多个同步控制显示单元) 组成。
多画面动态图像实时控制器 1接收外部的不同格式视频信号 (包括高清 /VGA/视频信 号)实时叠加为一路数字图像信号, 通过数字图像传输总线同时传送多个同步控制显示 单元 (不同同步控制显示单元的组成和工作原理相同, 下面选取其中一路说明)。 同步 控制显示单元 2包括图像分块抓取单元 21、 同步调整单元 22、 图像编码输出单元 23。 图像分块抓取单元 21接收多画面动态图像实时控制器 1的数字图像信号, 根据软件设 置抓取相应大小的数字图像送给同步调整单元 22, 同步调整单元 22接收图像分块抓取 单元 21,调整为标准分辨并参照输入的数字图像信号的同步控制调整本单元的输出数字 图像信号的输出时间, 使不同同步控制显示单元输出的数字图像信号完全同步, 图像编 码输出单元 23编码同步调整单元 22数字图像信号为标准 DVI信号输出到 LED显示屏。
同步控制显示单元 2包括图像分块抓取单元 21、 同步调整单元 22、 图像编码输出 单元 23。 图像分块抓取单元 21接收多画面动态图像实时控制器 1的数字图像信号, 根 据软件设置抓取相应大小的数字图像送给同步调整单元 22, 同步调整单元 22接收图像 分块抓取单元 21,调整为标准分辨并参照输入的数字图像信号的同步控制调整本单元的 输出数字图像信号的输出时间, 使不同同步控制显示单元输出的数字图像信号完全同 少。
工作原理
整体构成如图 1所示, 包括多画面动态图像实时控制器 1, 多路同步控制显示单元 2两大部分。 本发明的主要部件的工作流程: 多画面动态图像实时控制器 1接收外部输入的视频 信号, 完成实时的叠加处理, 合成一路数字图像信号通过数字图像传输总线同时传输给 不同的同步控制显示单元, 同步控制显示单元 2包括图像分块抓取单元 21、同步调整单 元 22、 图像编码输出单元 23。 图像分块抓取单元 21接收多画面动态图像实时控制器 1 的数字图像信号,根据软件设置抓取相应大小的数字图像送给同步调整单元 22, 同步调 整单元 22接收图像分块抓取单元 21的信号,调整为标准分辨并参照输入的数字图像信 号的同步控制调整本单元的输出数字图像信号的输出时间,使不同同步控制显示单元输 出的数字图像信号完全同步, 图像编码输出单元 23编码同步调整单元 22数字图像信号 为标准 DVI信号输出到 LED显示屏。
图像分块抓取单元 21 主要功能是接收多画面动态图像实时控制器 1的数字图像信 号, 根据软件设置的抓取大小裁剪完整数字图像信号的相应位置图像送给后一单元处 理。 图像分块抓取单元 21由一颗增强 80186架构的控制器、 视频信号输入模块两部分组 成。 图像分块抓取单元 21的视频信号输入模块 接收由 CLK 、 DEN、 HS、 VS、 RIN [7 : 0]、 GIN [7 : 0]、 BIN [7 : 0]组成的数字图像信号, 通过 DEN、 HS、 VS同步信号频率通过查找相 应的模式表判断输入数字图像信号的分辨率, 80186控制器接收外部的控制信息设置对 应的寄存器来精确裁剪输入的数字图像信号, 设置的寄存器包括裁剪的大小, 位置等信 息。
同步调整单元 22 由一颗高性能的 DSP处理模块构成, 配合外部两颗高速的存储器 完成图像的缓存, 大小位置的调整, 输出同步精确控制。 DSP处理模块存储总线宽度是 32位 RMD [31 : 0], 总体的带宽 6. 4Gbit/s。
同步调整单元 22 采用独特的显示频率控制技术, 实现不同显示单元的输出同步信 号精确一致。 具体的实施分两步完成, 第一步不同的同步显示控制单元的输出严格锁定 多画面动态图像实时控制器 1输出的数字图像信号的场同步信号。第二步不同显示控制 单元输出的场同步延迟根据输入信号的位置相应调整。第一步中场同步锁定方法本装置 采用可以采用三种方式完成, 1、 当输入场同步到来时, 输出场同步立即变化。 2、 当输 入场同步到来时, 输出场同步在显示的前一行或是后一行中选取间隔时间最短的点变 化。 3、 当输入场同步到来时, 输出场同步在当前行显示完以后变化。 这三种锁定频率 的方式各有优缺点, 可以根据实际需要设置。 第二步需要建立在第一步基础之上, 必须 保证每个同步显示控制单元的输出频率是明显的相位差的, 需要控制在显示一行的时间 之内。 采用上面的三种锁频方式完全可以满足该要求, 由于每个同步显示控制单元的对 输入数字图像抓取的位置是不一样的, 这样输出的时间也要相应不一样, 才能保证输出 到每个 LED显示单元上在同一帧内组成一个完整的画面,故需要对显示区域在整体图像 下面的单元进行延时输出, 即调整输出场同步 (IVS) 与输入数字图像的场同步 (VS在 图像多画面动态图像实时控制抓取 21 ) 的相对延时。 调整后的图像通过 CLKIN、 IVS、 IHS、 IDEN同步时钟信号, INBE【2: 9】、 INGE【2: 9】、 INRE【2: 9】等图像信号输出 到图像编码输出单元 23。 图像编码输出单元 23 由一颗 TTL转 DVI芯片组成, 完整数字图像的编码输出, 给 LED屏幕显示。 本单元采用的是 TFP410专用图像转换芯片, 接收同步调整单元 22输出 的 TTL数字图像信号, 该信号包含 CLKIN、 IVS、 IHS、 IDEN同步时钟信号, INBE【2: 9】、 INGE【2: 9】、 INRE【2: 9】等图像信号。通过 TFP转换为 TMDS信号为 D— TX2p、 D_TX2m, D— TXlp、 D_TXlm, D— TX0p、 D_TX0m, D— TXCp、 D— TXCm四对差分信号通过 P3 DVI-I座输 出。

Claims

权 利 要 求
1. 一种全彩 LED点阵上同时显示实时多画面的方法, 包括多画面动态图像实时控 制和同步控制显示, 其特征是包括下列步骤:
A.将外部的不同格式 (高清 /VGA/视频信号)视频信号经多画面动态图像实时控制单 元, 实现实时叠加为一路数字图像信号; 多画面动态图像实时控制器接收外部输入的视 频信号, 完成实时的叠加处理, 合成一路数字图像信号通过数字图像传输总线同时传输 给不同的同步控制显示单元;
B. 将实时叠加为一路的数字图像信号经数字图像传输总线同时传送给多个同步控 制显示单元, 经图像分块抓取、 图像同步调整、 图像编码输出, 实现不同同步控制显示 单元输出的数字图像信号完全同步。
2. 如权利要求 1所述的全彩 LED点阵上同时显示实时多画面的方法, 其特征是所 述同步控制显示包括图像分块抓取单元接收多画面动态图像实时控制单元的数字图像 信号, 根据软件设置抓取相应大小的数字图像送给同步调整单元, 同步调整单元接收图 像分块抓取的数字图像,调整为标准分辨并参照输入的数字图像信号的同步控制调整本 单元的输出数字图像信号的输出时间, 实现不同同步控制显示单元输出的数字图像信号 完全同步。
3. 如权利要求 1或 2所述的全彩 LED点阵上同时显示实时多画面的方法, 其特征是 所述采用显示频率控制技术, 实现不同显示单元的输出同步信号精确一致, 具体实施分 为两步完成, 第一步: 不同的同步显示控制单元的输出严格锁定多画面动态图像实时控 制输出的数字图像信号的场同步信号; 第二步: 不同显示控制单元输出的场同步延迟根 据输入信号的位置相应调整; 其中, 第一步中场同步锁定方法包括以下三种方式: a、 当输入场同步到来时, 输出场同步立即变化; b、 当输入场同步到来时, 输出场同步在 显示的前一行或是后一行中选取间隔时间最短的点变化; c、 当输入场同步到来时, 输 出场同步在当前行显示完以后变化。
4. 实现权利要求 1的全彩 LED点阵上同时显示实时多画面方法的装置, 其特征是 包括多画面动态图像实时控制器和同步控制显示单元,其中多画面动态图像实时控制器 接收外部输入的视频信号并经传输总线与同步控制显示单元连接,其中同步控制显示单 元包括图像分块抓取单元、 同步调整单元和图像编码输出单元, 其中传输总线经图像分 块抓取单元、 同步调整单元与图像编码输出单元连接。
5. 如权利要求 4所述的全彩 LED点阵上同时显示实时多画面的装置, 其特征是所 述图像分块抓取单元主要由一颗 80186控制器和与之连接的视频信号输入模块组成, 其 中 80186控制器接收外部的控制信息设置对应的寄存器来精确裁剪输入的数字图像信 号, 设置的寄存器包括裁剪的大小、 位置信息, 视频信号输入模块接收由 CLK 、 亂 HS、 VS、 RIN[7 : 0]、 GIN[7 : 0]、 BIN[7: 0]组成的数字图像信号, 通过 DEN、 HS、 VS同步 信号频率查找相应的模式表判断输入数字图像信号的分辨率。
6. 如权利要求 4所述的全彩 LED点阵上同时显示实时多画面的装置, 其特征是所 述同步调整单元主要由一颗 DSP处理模块和与之连接的两颗存储器组成,完成图像的缓 存、 大小位置的调整、 输出同步精确控制, 调整后的图像通过 CLKIN、 IVS、 IHS、 IDEN 同步时钟信号, INBE 【2: 9】、 INGE 【2: 9】、 INRE 【2: 9】 图像信号输出到图像编码输 出单元。
7. 如权利要求 4所述的全彩 LED点阵上同时显示实时多画面的装置, 其特征是所 述图像编码输出单元包括一颗 TTL转 DVI芯片,接收同步调整单元输出的 TTL数字图像 信号, 该信号包含 CLKIN、 IVS、 IHS、 IDEN同步时钟信号, INBE [ 2: 9】、 INGE [ 2: 9】、 INRE [ 2: 9】图像信号,通过 TFP转换为 TMDS信号为 D— TX2p、 D_TX2m, D— TXlp、 D_TXlm, D— TX0p、 D_TX0m, D— TXCp、 D— TXCm四对差分信号, 通过 P3 DVI-I座输出给 LED屏幕显 示。
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