JPH02152391A - Television signal reproduction evaluation test pattern - Google Patents
Television signal reproduction evaluation test patternInfo
- Publication number
- JPH02152391A JPH02152391A JP30653788A JP30653788A JPH02152391A JP H02152391 A JPH02152391 A JP H02152391A JP 30653788 A JP30653788 A JP 30653788A JP 30653788 A JP30653788 A JP 30653788A JP H02152391 A JPH02152391 A JP H02152391A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- test pattern
- color difference
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011156 evaluation Methods 0.000 title description 4
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 239000003086 colorant Substances 0.000 abstract description 4
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、テレビジョン信号の再生画像を評価するた
めのテストパターンに関するもので、特に色の再生を評
価するテストパターンに係るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a test pattern for evaluating reproduced images of television signals, and particularly to a test pattern for evaluating color reproduction.
一般にテレビジョン信号の再生画像の評価において、色
の再生を評価するテストパターンとして、標準カラーパ
ー信号が用いられている。Generally, in evaluating reproduced images of television signals, standard color par signals are used as test patterns for evaluating color reproduction.
従来のこの種テストパターンは以上のようになされてい
るので、標準カラーパー信号の再生画像で色の再生特性
を評価するためには熟練を要するものであった。Conventional test patterns of this type are constructed as described above, and therefore, skill is required to evaluate the color reproduction characteristics using a reproduced image of a standard color par signal.
この発明は上記のような課題を解消するためになされた
もので、熟練を要することなく視覚的に容易に色の再生
を評価することのできるテレビジョン信号再生評価用テ
ストパターンを得ることを目的とする。This invention was made in order to solve the above-mentioned problems, and the purpose is to obtain a test pattern for evaluating television signal reproduction that allows color reproduction to be easily evaluated visually without requiring any skill. shall be.
この発明に係るテレビジョン信号再生評価用テストパタ
ーンは、テレビジョン受像機における色の再生特性を評
価するためのテレビジョン信号再生評価用テストパター
ンにおいて、画面上の座標に対応した色差信号値を持つ
ような複合映像信号若しくはY、Cのコンポーネント信
号をテストパターンとしたものである。The television signal reproduction evaluation test pattern according to the present invention is a television signal reproduction evaluation test pattern for evaluating the color reproduction characteristics of a television receiver, which has color difference signal values corresponding to coordinates on the screen. The test pattern is such a composite video signal or Y and C component signals.
(作 用〕
この発明においては、画面上の座標に対応した色差信号
値をもつような複合映像信号若しくはY。(Function) In the present invention, a composite video signal or Y having color difference signal values corresponding to coordinates on the screen is used.
Cのコンポーネント信号をテレビジョン受像機に入力す
ることによって、受像機の特性を評価することができる
。By inputting the C component signal into a television receiver, the characteristics of the television receiver can be evaluated.
以下、この発明の一実施例を図について説明する。第1
図はこの発明によるテレビジョン信号再生評価用テスト
パターンの画面を表わし、この画面上における座標に対
応して色差信号の値を例えば次のように定める。An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a screen of a test pattern for evaluating television signal reproduction according to the present invention, and the value of the color difference signal is determined, for example, as follows, corresponding to the coordinates on this screen.
■ 画面中央を座標の原点と定め、原点を通る2本の直
交する直線をR−Y軸(原点を通る水平走査線)とB−
Y軸(走査線と直交)と定める。■ Set the center of the screen as the origin of the coordinates, and draw two orthogonal straight lines passing through the origin as the R-Y axis (horizontal scanning line passing through the origin) and B-
It is defined as the Y axis (perpendicular to the scanning line).
■ 各座標における色差信号の値を下記のように定める
。■ Determine the color difference signal value at each coordinate as follows.
RY (x+y) −k 、X (k+ :定数)
B Y(x+y) =kg+ y (hg:
定数)ただし、R−Y (x、y)は座1(x、y)に
おけるR−Y信号値
B −Y (X、V) は座標(X、Y)におけるBY
信号値
である。RY (x+y) −k, X (k+: constant)
B Y (x+y) = kg+ y (hg:
Constant) However, R-Y (x, y) is the R-Y signal value at the locus 1 (x, y). -Y (X, V) is the BY at the coordinate (X, Y).
It is a signal value.
上記のように定められた色差信号を直角2相変調し、複
合映像信号若しくはY、Cのコンポーネント信号とした
ものをテストパターンとする。なお、輝度信号に関して
は色信号再生に影響なく、かつ評価しやすい程度の輝度
に一定値を与えておく 。A test pattern is obtained by performing quadrature two-phase modulation on the color difference signal determined as described above to obtain a composite video signal or Y and C component signals. Regarding the luminance signal, a constant value is given to the luminance to the extent that it does not affect color signal reproduction and is easy to evaluate.
一般にテレビジョン受像機において色の再生を評価する
必要がある原因の一つとして現行のNTSC信号は、2
つの色差信号を直角2相変調し、輝度信号に周波数多重
していることがあげられる。すなわち、上述したような
画面上の座標に対応した色差信号値をもつような複合映
像信号若しくはY。In general, one of the reasons why it is necessary to evaluate color reproduction in television receivers is that the current NTSC signal is
One example of this is quadrature two-phase modulation of two color difference signals and frequency multiplexing with the luminance signal. That is, a composite video signal or Y having a color difference signal value corresponding to the coordinates on the screen as described above.
Cのコンポーネント信号をテレビジョン受像機に入力す
ることによって、該受像機の特性を評価することができ
る。By inputting the C component signal into a television receiver, the characteristics of the television receiver can be evaluated.
第2図1al〜fdlは評価方法の一例を示したもので
、原画すなわち変調する以前の画像を[81図とし、A
の色およびBの色は図に示した座標位置に存在している
ものとする。例えば受像機における復調角の違いは(b
1図のようにへ〇色およびBの色の再生位置が移動する
。また、色相の違いは(C1図のようにあるいは色差信
号のブランキングレベルの違いは[d1図のように色の
再生位置が移動する。Figure 2 1al to 1fdl show an example of the evaluation method.
It is assumed that the colors , , and B exist at the coordinate positions shown in the figure. For example, the difference in demodulation angle in a receiver is (b
As shown in Figure 1, the playback positions of the colors H and B move. Furthermore, the difference in hue (as shown in figure C1) or the difference in the blanking level of the color difference signal causes the reproduction position of the color to move as shown in figure d1.
なお、実施例では画面上で直交する軸をR−Y軸、B−
Y軸としたが、その他、I、Q軸であってもよく、また
、2つの色差信号を直角2相変調した信号全てに対して
上記同様なテストパターンを作成することができる。In the example, the orthogonal axes on the screen are R-Y axis and B-
Although the Y axis is used, the I and Q axes may also be used. Also, test patterns similar to those described above can be created for all signals obtained by quadrature two-phase modulation of two color difference signals.
以上説明したようにこの発明によれば、画面上の座標に
対応して色差信号値が定めであるため、視覚的に簡単、
容易に色の再生を評価することができる。As explained above, according to the present invention, since the color difference signal value is determined corresponding to the coordinates on the screen, it is visually easy to use.
Color reproduction can be easily evaluated.
tl、寸の す画面。 tl, size screen.
Claims (1)
めのテレビジョン信号再生評価用テストパターンにおい
て、画面上の座標に対応した色差信号値を持つような複
合映像信号若しくはY、Cのコンポーネント信号をテス
トパターンとしたことを特徴とするテレビジョン信号再
生評価用テストパターン。Testing composite video signals or Y, C component signals that have color difference signal values corresponding to coordinates on the screen in test patterns for evaluating television signal reproduction to evaluate the color reproduction characteristics of television receivers. A test pattern for evaluating television signal reproduction, characterized in that the pattern is a pattern.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30653788A JPH02152391A (en) | 1988-12-02 | 1988-12-02 | Television signal reproduction evaluation test pattern |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30653788A JPH02152391A (en) | 1988-12-02 | 1988-12-02 | Television signal reproduction evaluation test pattern |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02152391A true JPH02152391A (en) | 1990-06-12 |
Family
ID=17958229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30653788A Pending JPH02152391A (en) | 1988-12-02 | 1988-12-02 | Television signal reproduction evaluation test pattern |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02152391A (en) |
-
1988
- 1988-12-02 JP JP30653788A patent/JPH02152391A/en active Pending
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