Character superimposition device and character superimposition method for video tracking

A character superposition and video tracking technology, applied in color TV parts, TV system parts, TV and other directions, can solve the problems of complex peripheral circuits, poor flexibility, and many discrete components reduce system stability, and achieve scalability. The effect of strong performance, simple design and perfect scalability

Inactive Publication Date: 2015-07-01
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem that the existing character overlay device adopts the screen memory image mode, and the address of the display memory corresponds to the fixed position of the monitor, w

Method used

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  • Character superimposition device and character superimposition method for video tracking
  • Character superimposition device and character superimposition method for video tracking
  • Character superimposition device and character superimposition method for video tracking

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specific Embodiment approach 1

[0028] Specific implementation mode 1. Combination Figure 1 to Figure 6 Description of this embodiment, the character superimposer for video tracking includes an ARM processor module and a character superimposition module; the character superposition module is composed of ten character superposition chips connected in series, and the ARM processor module includes a character Variable initialization module, serial port communication module, mouse monitoring module, communication protocol analysis module, write array update module and font control overlay module;

[0029] The ARM processor module is the core hardware unit of the character superimposing device, and the module is used to provide a hardware platform for running the character superimposing program, and simultaneously provide interfaces such as SPI, USB, network port, and serial port. The SPI interface is used to connect the character overlay module to realize the superimposition information transmission; the USB in...

specific Embodiment approach 2

[0056] Specific embodiment two, combine Figure 7 and Figure 8 Illustrate this embodiment, be used for the character overlay method of video tracking, the specific process of this method is:

[0057] 1. The character superposition device is powered on and started, and runs the Linux system.

[0058] 2. Start the script after starting Linux, mount the written underlying driver, and then call the character overlay program.

[0059] 3. The program first initializes the characters to be superimposed into a variable structure. Then start the serial port thread and the mouse thread. The serial port thread works in blocking mode and is mainly used to wait for the video tracker to send information. The mouse thread works in blocking mode, waiting for the mouse to move or click. Call the write array update module to update the data of the declared structure variable to the write array according to a certain format. Initialize 10 pieces of MAX7456 to make it work.

[0060] 4. Th...

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Abstract

The invention relates to a character superimposition device and a character superimposition method for video tracking and aims to solve the problems of complex peripheral circuits, reduction of system stability due to excessive discrete components, low flexibility and the like caused by the fact that an address of a display memory corresponds to a permanent position of a monitor due to a screen memory map mode adopted by an existing character superimposition device. The character superimposition device comprises an ARM (advanced RISC machines) processor module and a character superimposition module; ten character superimposition chips are serially connected to form the character superimposition module; the ARM processor module comprises a character variable initialization module, a serial port communication module, a mouse monitoring module, a communication protocol analysis module, a write-in array updating module and a word stock control superimposition module. The character superimposition device is high in expandability, the plurality of character superimposition chips are connected serially to realize output of four-channel videos, and accordingly perfect expandability is achieved. In addition, the character superimposition device and the character superimposition method for video tracking have the advantages of convenience in use and effectiveness in real-time superimposition of tracking information in a video tracking system.

Description

technical field [0001] The invention relates to a character overlay device and method, in particular to a video overlay display device for overlaying character information and graphic overlay in a video tracker. Background technique [0002] The video tracker is an image information processing unit, which processes the video signal from the TV camera in real time, extracts the target from the background image, and settles the coordinate deviation of the center point of the target relative to the electrical axis of the video tracker, and sends the deviation to the The servo system realizes the closed-loop real-time tracking of the target. [0003] The character superimposer is a device that mixes character information into the video electronic signal, so that the designated graphics and characters are displayed at the designated position of the TV image. Character superposition devices are widely used in TV tracking systems. In the TV tracking system, in order to facilitate...

Claims

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Application Information

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IPC IPC(8): H04N5/445
Inventor 顾海军王永杨凤攀梁辉赵晓晖
Owner JILIN UNIV
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