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Digital TV-set interlaced scanning testing picture and generating method

A technology of interlaced scanning and digital TV, which is applied in the field of digital TV interlaced scanning test chart and its generation, and can solve the problems affecting the vertical definition of the image, and there is no accurate and quantitative measurement method, etc.

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

In the interlaced scanning TV system, the "parallel" phenomenon will seriously affect the vertical definition of the image, but it is difficult to avoid it completely.
The degree of "parallelism", that is, the test of interlaced scanning performance, is an important indicator for evaluating the scanning performance of interlaced scanning TV systems, but so far there is no accurate and quantitative measurement method

Method used

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  • Digital TV-set interlaced scanning testing picture and generating method
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  • Digital TV-set interlaced scanning testing picture and generating method

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Embodiment Construction

[0035] Aiming at the "parallel" phenomenon that is easy to appear in reproduced images of an interlaced scanning television system, the present invention provides a principle and a test chart that can intuitively and accurately test the direction and degree of parallelism. According to the process of displaying images by an interlaced scanning television system, the present invention judges whether the reproduced image is through "a test image unit composed of black self-interleaving horizontal stripes with a width of two pixels, which are arranged alternately by one pixel up and down in the left and right parts". There is a parallel problem; according to the mathematical model, for different "parallel" directions and sizes, quantitatively calculate and generate a test image unit series composed of adjacent lines with corresponding brightness, which is used to judge the "parallel" direction and accurately measure the degree of parallelism .

[0036] The present invention can b...

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Abstract

The test chart can visually and precisely test the performance of interlacing scanning for digital TV system, and judge if the displayed image exits parallel problem. It exhibits percentage about the parallel problem degree. The method includes following steps: the interlacing scanning test chart consists of image test unit that is composed of black and white horizontal strips whose right and left part staggers a pixel staggered arrangement, and whose width is two pixels; the TV interlacing scanning test chart is composed of the above image test unit.

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 interlaced scanning test chart and a generating method thereof. Background technique [0002] Interlaced scanning is the scanning method of the current analog TV system, and it is also the main scanning method of the digital TV system that has entered the practical stage. In the interlaced scanning TV system, the "parallel" phenomenon will seriously affect the vertical definition of the image, but it is difficult to avoid it completely. "Parallel" degree, that is, the test of interlaced scanning performance, is an important index to evaluate the scanning performance of interlaced scanning TV system, but there is no accurate and quantitative measurement method so far. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a digital TV in...

Claims

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Application Information

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IPC IPC(8): H04N17/02
Inventor 李桂苓郑冰洋唐强王立李秀敏刘昱
Owner TIANJIN UNIV