CN1294770C - Digital TV-set interlaced scanning testing picture and generating method - Google Patents
Digital TV-set interlaced scanning testing picture and generating method Download PDFInfo
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- CN1294770C CN1294770C CNB200410019447XA CN200410019447A CN1294770C CN 1294770 C CN1294770 C CN 1294770C CN B200410019447X A CNB200410019447X A CN B200410019447XA CN 200410019447 A CN200410019447 A CN 200410019447A CN 1294770 C CN1294770 C CN 1294770C
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Abstract
The present invention relates to a digital television test signal and a testing picture and a generating method thereof, more specifically a digital television interlaced scanning testing picture and a generating method thereof. The present invention provides the digital television interlaced scanning testing picture and the generating method thereof. The testing picture can visually and precisely test the interlacing scanning performance of a digital television system, judge whether the displayed picture has parallel problems, judge the parallel occurring direction, and precisely display the percentage of the parallel severity. The present invention adopts the technical scheme that a digital television interlacing testing picture composed of a left part and a right part in staggered arrangement at the upper side and the lower side by a pixel. Black and white alternating horizontal strips of which the width is two pixels form a testing picture unit, and the digital television interlacing testing picture is formed by a testing picture unit series. The present invention is mainly used for manufacturing the digital television interlacing testing picture.
Description
Technical field
The present invention relates to digital TV test signal and test drawing generating method, specifically relate to Digital Television interlacing scan test drawing generating method.
Background technology
Interlacing scan is present simulated television system scan mode, also is the main scan mode that has entered the digital television system in practicability stage.In the interlaced scan tv system, " walking abreast " phenomenon can have a strong impact on the vertical definition of image, but is difficult to avoid fully.The degree that " walks abreast " is the test of interlacing scan performance, is an important indicator estimating interlaced scan tv system scan performance, but does not still have accurate, quantitative assay method so far.
Summary of the invention
For overcoming the deficiencies in the prior art, the purpose of this invention is to provide Digital Television interlacing scan test drawing generating method, this resolution chart can intuitively and accurately be tested the interlacing scan performance of digital television system, judge whether the image that shows exists parallel problem, and provide the parallel judgement that direction occurs, and accurately demonstrate the percentage of the parallel order of severity.
The technical solution used in the present invention is that a kind of Digital Television interlacing scan test drawing generating method comprises the following steps:
Determine the resolution chart size; Determine background color;
Whole resolution chart is divided into different test cell modules, and determines the scope of each test pattern unit module, for each test pattern unit module, two parts of equity, i.e. left-half and right half part about being divided into again;
Carry out test pattern unit module left-half predefine and right half part predefine respectively, make the test pattern unit module that generates by predefine present chequered with black and white horizontal stripe, the width of every horizontal stripe is two pixels, and right half part is with respect to the upwards staggered pixel of left-half;
Ce Shi different situations are adjusted corresponding luminance signal as required;
Set up Y, U, V file,
Wherein, module left-half predefine is: p is an integer, p=i/2, and when p%2=0, y (i)=16; When p%2=1, y (i)=235.
Module right half part predefine is: p is an integer, p=(i+1)/2, and when p%2=0, y (i)=16; When p%2=1, y (i)=235.
I is corresponding line number; P is an intermediate variable; Y (i) is the capable luminance signal of i.
In addition, the different situations of testing as required after the described module left-half predefine are adjusted corresponding luminance signal:
Odd-numbered line is upwards and to the situation of even number line: i is even number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
Odd-numbered line is downwards and to the situation of even number line: i is even number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is odd number and y (i)=16, and y (i) changes 219 * percent+16 into;
Even number line is upwards and to the situation of odd-numbered line: i is odd number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is even number and y (i)=16, and y (i) changes 219 * percent+16 into;
Even number line is downwards and to the situation of odd-numbered line: i is odd number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
I is corresponding line number; P is an intermediate variable; Y (i) is the capable luminance signal of i, and percent represents degree of concurrence.
Have, the different situations of testing as required after the described module right half part predefine comprise corresponding luminance signal adjustment again:
Odd-numbered line is upwards and to the situation of even number line: i is even number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is odd number and y (i)=16, and y (i) changes 219 * percent+16 into;
Odd-numbered line is downwards and to the situation of even number line: i is even number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
Even number line is upwards and to the situation of odd-numbered line: i is odd number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
Even number line is downwards and to the situation of odd-numbered line: i is odd number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is even number and y (i)=16, and y (i) changes 219 * percent+16 into.
I is corresponding line number; P is an intermediate variable; Y (i) is the capable luminance signal of i, and percent represents degree of concurrence.
Digital Television interlacing scan resolution chart provided by the invention and generation method thereof can be brought following effect:
Resolution chart of the present invention is staggered by left and right two parts pixel that interlaces up and down, width is that the black of two pixels formed from alternate horizontal stripe, thereby the interlacing scan performance that can intuitively and accurately test digital television system provided by the invention, judge whether the image that shows exists parallel problem, and provide the parallel judgement that direction occurs, and accurately demonstrate the percentage of the parallel order of severity.Resolution chart of the present invention is generated according to Mathematical Modeling by computer, thereby goes for different systems interlaced scan tv system.
Description of drawings
Fig. 1 judges whether the interlaced scan tv system display exists the image measurement unit of " walking abreast " phenomenon, and as Figure of abstract
The situation of Fig. 2 correspondence " the idol row is 20% to strange row, degree of concurrence also downwards "
The situation of Fig. 3 correspondence " the idol row is 60% to strange row, degree of concurrence also downwards "
Fig. 4 is that Digital Television interlacing scan resolution chart generates method flow diagram
Embodiment
At " walk abreast " phenomenon that interlaced scan tv system reproduced image occurs easily, the invention provides a kind of can be intuitively, the also principle and the resolution chart of line direction and degree of test exactly.Process according to interlaced scan tv system display image, the present invention judges by " left and right two parts pixel that interlaces up and down is staggered; width is the black test pattern unit module of forming from alternate horizontal stripe of two pixels " whether reproduced image exists parallel problem; By Mathematical Modeling, at different " walking abreast " directions and size, quantitatively calculate respectively, generate the test pattern unit module series of forming by the corresponding bright adjacent lines, be used for judging " walking abreast " direction, and accurately measure parallel degree.
The present invention goes for different systems interlaced scan tv system.Owing to quantitatively calculate, generate a series of test pattern unit module by Mathematical Modeling, institute is so that judge intuitively, exactly and line direction and size.The core technology of this invention is: measure " walk abreast " principle of phenomenon of TV reproduced image; Determine and the method for line direction and the generation method of corresponding test pattern unit module series; The generation method of the calculating of degree of concurrence, assay method and corresponding test pattern unit module series; The Scale Method of the layout designs of resolution chart and " walking abreast " degree.
With reference to the accompanying drawings and embodiment, further specify the present invention.
Digital Television interlacing scan resolution chart, it constitutes: left and right two parts pixel that interlaces up and down is staggered, width is that the black of two pixels formed the test pattern unit module from alternate horizontal stripe, constitutes Digital Television interlacing scan resolution chart by test pattern unit module series.
Wherein test pattern unit module series is at different " walking abreast " directions and size, the test pattern unit module series of being made up of the corresponding bright adjacent lines.
1 according to test pattern unit module and arranged on left and right sides mean flow rate, and whether intuitive judgment exists parallel phenomenon;
2 become identically according to certain module and arranged on left and right sides mean flow rate in the test pattern unit module series of calculating in advance, setting, judge intuitively and line direction;
3 calculate, set different lines gray values, calculate and generate a series of test pattern unit modules in advance, in the testing, become identically according to certain module and arranged on left and right sides mean flow rate in the test pattern unit module series, measure degree of concurrence intuitively;
The 4 different also line directions that may exist by concrete parallel measurement range requirements and interlaced scan tv system design the also test pattern unit module of line directions and degree of some sequential tests differences respectively.
A kind of Digital Television interlacing scan test drawing generating method comprises the following steps:
Determine the resolution chart size; Determine background color;
Whole resolution chart is divided into different test cell modules, and determines the scope of each test pattern unit module, for each test pattern unit module, two parts of equity, i.e. left-half and right half part about being divided into again;
Carry out test pattern unit module left-half predefine and right half part predefine respectively, make the test pattern unit module that generates by predefine present chequered with black and white horizontal stripe, the width of every horizontal stripe is two pixels, and right half part is with respect to the upwards staggered pixel of left-half;
Ce Shi different situations are adjusted corresponding luminance signal as required;
Set up Y, U, V file,
Wherein, module left-half predefine is: p is an integer, p=i/2, and when p%2=0, y (i)=16; When p%2=1, y (i)=235.
Module right half part predefine is: p is an integer, p=(i+1)/2, and when p%2=0, y (i)=16; When p%2=1, y (i)=235.I is corresponding line number; P is an intermediate variable; Y (i) is the capable luminance signal of i.
In addition, the different situations of testing as required after the described module left-half predefine are adjusted corresponding luminance signal:
Odd-numbered line is upwards and to the situation of even number line: i is even number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
Odd-numbered line is downwards and to the situation of even number line: i is even number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is odd number and y (i)=16, and y (i) changes 219 * percent+16 into;
Even number line is upwards and to the situation of odd-numbered line: i is odd number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is even number and y (i)=16, and y (i) changes 219 * percent+16 into;
Even number line is downwards and to the situation of odd-numbered line: i is odd number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
I is corresponding line number; P is an intermediate variable; Y (i) is the capable luminance signal of i, and percent represents degree of concurrence.
Have, the different situations of testing as required after the described module right half part predefine comprise corresponding luminance signal adjustment again:
Odd-numbered line is upwards and to the situation of even number line: i is even number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is odd number and y (i)=16, and y (i) changes 219 * percent+16 into;
Odd-numbered line is downwards and to the situation of even number line: i is even number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
Even number line is upwards and to the situation of odd-numbered line: i is odd number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
Even number line is downwards and to the situation of odd-numbered line: i is odd number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is even number and y (i)=16, and y (i) changes 219 * percent+16 into.
I is corresponding line number; P is an intermediate variable; Y (i) is the capable luminance signal of i, and percent represents degree of concurrence.As shown in Figure 4, the beginning of program, the size of at first definite resolution chart.For example, to high-definition television system, the resolution chart size of showing with level, vertical valid pixel numerical table is 1920 * 1080; To the standard definition television system, the resolution chart size of showing with level, vertical valid pixel numerical table is 720 * 576.By the macrodefinition parameter in the reprogramming, can generate the resolution chart of different size.Determine background color then, make the mid portion of each module present background colour.Then,, whole resolution chart is divided into different parts, i.e. each module, and the scope of definite each module according to different test requests.For each module, the part of two equities about at first being divided into.These two parts are carried out predefine, make the pattern that generates by predefine be rendered as " the two pixel black and white strip right-hand components that the horizontal directions fork occurs are with respect to the upwards wrong pixel of left-half ", then as required the test different situations, corresponding luminance signal is adjusted, and concrete method of adjustment and Mathematical Modeling are seen note.At this moment, color difference signal remains unchanged.To the YUV of all pixels calculate finish after, set up Y, V, U file.Data arrangement order in the file, consistent with image by scanning sequency left-to-right, from top to bottom.
Interlacing scan is present simulated television system scan mode, also is the main scan mode that has entered the digital television system in practicability stage.In the interlaced scan tv system, " walking abreast " phenomenon can have a strong impact on the vertical definition of image, but is difficult to avoid fully.The degree that " walks abreast " is an important indicator estimating interlaced scan tv system scan performance, but does not still have accurate, quantitative assay method so far.The present invention at the television system of different systems, studies, designs, generated a kind of test signal and method intuitively and accurately for measuring the quality of interlacing scan characteristic.Use the present invention, can not only judge intuitively whether display exists " walk abreast " phenomenon, and can judge the different directions of " walking abreast " appearance, provide " walk abreast " test result of degree of accurate evaluation, for solution " walking abreast " problem provides foundation.The present invention is widely used in production, adjustment, test and the maintenance of television receiver, display.
Claims (4)
1. a Digital Television interlacing scan test drawing generating method is characterized in that, comprises the following steps:
Determine the resolution chart size; Determine background color;
Whole resolution chart is divided into different test pattern unit modules, and determines the scope of each test pattern unit module, for each test pattern unit module, two parts of equity, i.e. left-half and right half part about being divided into again;
Carry out test pattern unit module left-half predefine and right half part predefine respectively, make the test pattern unit module that generates by predefine present chequered with black and white horizontal stripe, the width of every horizontal stripe is two pixels, and right half part is with respect to the upwards staggered pixel of left-half;
Ce Shi different situations are adjusted corresponding luminance signal as required;
Set up Y, U, V file.
2. a kind of Digital Television interlacing scan test drawing generating method according to claim 1 is characterized in that,
Test pattern unit module left-half predefine is: p is an integer, p=i/2, and when p%2=0, y (i)=16; When p%2=1, y (i)=235;
Test pattern unit module right half part predefine is: p is an integer, p=(i+1)/2, and when p%2=0, y (i)=16; When p%2=1, y (i)=235;
I is corresponding line number; P is an intermediate variable; Y (i) is the capable luminance signal of i.
3. a kind of Digital Television interlacing scan test drawing generating method according to claim 2 is characterized in that,
The different situations of testing as required after the described test pattern unit module left-half predefine are adjusted corresponding luminance signal:
Odd-numbered line is upwards and to the situation of even number line: i is even number and y (i)=235, and y (i) changes 219 into * and (1-2 * percent)+16, percent is the degree of concurrence of representing with percentage;
Odd-numbered line is downwards and to the situation of even number line: i is even number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is odd number and y (i)=16, and y (i) changes 219 * percent+16 into;
Even number line is upwards and to the situation of odd-numbered line: i is odd number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is even number and y (i)=16, and y (i) changes 219 * percent+16 into;
Even number line is downwards and to the situation of odd-numbered line: i is odd number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16.
4. a kind of Digital Television interlacing scan test drawing generating method according to claim 2 is characterized in that the different situations of testing as required after the described test pattern unit module right half part predefine comprise corresponding luminance signal adjustment:
Odd-numbered line is upwards and to the situation of even number line: i is even number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is odd number and y (i)=16, and y (i) changes 219 * percent+16 into;
Odd-numbered line is downwards and to the situation of even number line: i is even number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
Even number line is upwards and to the situation of odd-numbered line: i is odd number and y (i)=235, y (i) changes 219 into * (1-2 * percent)+16;
Even number line is downwards and to the situation of odd-numbered line: i is odd number and y (i)=235, and y (i) changes 219 * (1-percent)+16 into; I is even number and y (i)=16, and y (i) changes 219 * percent+16 into, the degree of concurrence of percent for representing with percentage.
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| CNB200410019447XA CN1294770C (en) | 2004-05-28 | 2004-05-28 | Digital TV-set interlaced scanning testing picture and generating method |
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| CNB200410019447XA CN1294770C (en) | 2004-05-28 | 2004-05-28 | Digital TV-set interlaced scanning testing picture and generating method |
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| CN 200610072926 Division CN1835603A (en) | 2004-05-28 | 2004-05-28 | Interlacing test chart of digital TV |
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| CN1294770C true CN1294770C (en) | 2007-01-10 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120279A (en) * | 1994-10-06 | 1996-04-10 | 声宝股份有限公司 | Frequency multiplication scanning processing method |
| US5872592A (en) * | 1995-06-02 | 1999-02-16 | Fluke Corporation | Test signals and test signal generators |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120279A (en) * | 1994-10-06 | 1996-04-10 | 声宝股份有限公司 | Frequency multiplication scanning processing method |
| US5872592A (en) * | 1995-06-02 | 1999-02-16 | Fluke Corporation | Test signals and test signal generators |
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