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Articulation of digital TV-set, overscanning testing picture and generating method thereof

A technology of digital TV and clarity, applied in the direction of TV, electrical components, image communication, etc., can solve the problems of exaggerating the image clarity, misleading and confusing, inaccurate and so on of the reconstructed image of TV products

Inactive Publication Date: 2005-02-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some manufacturers at home and abroad, in order to promote the sales of their products, use inaccurate or even false indicators to exaggerate the clarity of the reconstructed images of their TV products, causing misleading and confusion

Method used

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  • Articulation of digital TV-set, overscanning testing picture and generating method thereof
  • Articulation of digital TV-set, overscanning testing picture and generating method thereof

Examples

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Embodiment Construction

[0029] Below with reference to accompanying drawing and embodiment, further illustrate the present invention.

[0030] figure 1 It is the digital TV definition and overscan test chart of the present invention.

[0031] The test chart consists of a big circle in the middle for measuring the horizontal and vertical sharpness of the middle part of the TV image, four small circles for measuring the horizontal and vertical sharpness of the four corners of the TV image, gray levels on both sides and overscan test scales around.

[0032] In the large circle in the middle, 90°, 270°; 0°, 180° are distributed in 2 groups, each with 2 clusters of TV image definition wedge-shaped test line groups, which are used to measure the horizontal and vertical definition of the middle part of the TV image; 45°, 135° A slanted line is set to test the smoothness of the digital TV system to reproduce the slashed line; in the center are 3 groups of concentric circles to measure the resolution of the ...

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Abstract

The method can test definition and overscan of TV image for different digital TV system, different image format. The method includes following steps: the test chart consists of big circle in central area used for testing horizontal and vertical definition in central area of TV image, four small circle in corners used for testing the horizontal and vertical definition in four corners of TV image, gray level scale at both sides of image and overscan test scale at each side of image.

Description

technical field [0001] The invention relates to a digital TV test signal and a test chart and a generating method thereof, in particular to a digital TV definition and overscan test chart and a generating method thereof. Background technique [0002] Digital TV has entered the stage of practical application. The clarity of the image reproduced by the TV system is an important quality index of the digital TV system. It is urgent to determine the detection methods to standardize the design, production and sales of products. However, some manufacturers at home and abroad, in order to promote the sales of their products, use inaccurate or even false indicators to exaggerate the clarity of the reconstructed images of their TV products, causing misleading and confusion. Contents of the invention [0003] For overcoming the deficiencies in the prior art, the purpose of the present invention is to provide digital television sharpness and overscan test pattern and its generation me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/02
Inventor 李桂苓李秀敏王立郑冰洋李春涛郭映
Owner TIANJIN UNIV