JPS6013638B2 - color resolution compensator - Google Patents
color resolution compensatorInfo
- Publication number
- JPS6013638B2 JPS6013638B2 JP54118476A JP11847679A JPS6013638B2 JP S6013638 B2 JPS6013638 B2 JP S6013638B2 JP 54118476 A JP54118476 A JP 54118476A JP 11847679 A JP11847679 A JP 11847679A JP S6013638 B2 JPS6013638 B2 JP S6013638B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- color difference
- frequency component
- difference signal
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Description
【発明の詳細な説明】
本発明は、テレビジョン受像機の色再生部分に関し、色
差信号の帯城を仮想的に広くした場合と同様の色解像度
向上効果を奏する装置を提供しようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the color reproduction portion of a television receiver, and is intended to provide a device that achieves the same color resolution improvement effect as when the band of color difference signals is virtually widened. be.
ＮＴＳＣカラーテレビジョン方式においては色差信号の
帯域が規格によって制限されているので、色飽和度の高
い映像部分においては輝度信号により伝送されてくる情
報の割合が小さくなり、解像度が低下している。そこで
本発明においては、映像の色飽和度に比例して輝度信号
の高城成分を色差信号に付加せしめるようにすることに
よって、色差信号の帯域を広くした場合と同様に色解像
度を向上させるようにした装置を提供することを目的と
するものである。In the NTSC color television system, the band of the color difference signal is limited by the standard, so in video parts with high color saturation, the proportion of information transmitted by the luminance signal becomes smaller, resulting in lower resolution. Therefore, in the present invention, by adding the Takagi component of the luminance signal to the color difference signal in proportion to the color saturation of the video, color resolution can be improved in the same way as when the band of the color difference signal is widened. The purpose of this invention is to provide a device that can achieve the desired results.
以下、本発明の一実施例について図に基づいて説明する
。Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本装置のブロック図、第２図はその各信号の波
形図である。入力信号はＲ‐Ｙ，Ｂ−Ｙ，Ｇ−Ｙの３つ
の色差信号と輝度信号Ｙであり、出力信号は本回路によ
って補正された色差信号Ｒ′−Ｙ′，Ｂ′−Ｙ′，Ｇ′
一Ｙ′である。第２図では、この色差信号を代表してＣ
−Ｙとして示す。このＣとしてＲ．ＢまたはＧにおきか
えれば各色差信号が示される。まず、輝度信号Ｙを帯域
分離回路としてのフィル夕１に加えて帯域分離し高域成
分のみを取り出す。FIG. 1 is a block diagram of this device, and FIG. 2 is a waveform diagram of each signal. The input signals are the three color difference signals R-Y, B-Y, and G-Y and the luminance signal Y, and the output signals are the color difference signals R'-Y', B'-Y', and G corrected by this circuit. ′
-Y'. In Figure 2, C
Indicated as -Y. As this C, R. If it is replaced with B or G, each color difference signal is shown. First, the luminance signal Y is applied to a filter 1 as a band separation circuit to perform band separation and extract only high-frequency components.
このときの通過帯域は、色差信号の帯城（図中の点線）
と相補なものとなしておく。このフィル夕１によって分
離抽出した信号は輝度信号Ｙのうちの高域成分のみを含
みこれをＹけと称す。次にこの高城成分Ｙけは非線形回
路２に入力する。その特性は、正の部分の入力を抑圧す
るものとする。ここに図示した入出力特性はその」例で
あって、正の入力信号に対しては出力信号を０とし、員
の入力信号に対してはそのまま出力するものである。こ
れにより、この非線形回路２の出力信号はＹ′日で示す
ようになる。このように処理したＹＨを変調器３に入力
し、他方の入力信号である色差信号Ｃ一Ｙ（ＣはＲ，Ｂ
またはＧ）をそれぞれ変調する。The passband at this time is the band width of the color difference signal (dotted line in the figure).
Let's consider it as complementary. The signal separated and extracted by this filter 1 contains only the high frequency component of the luminance signal Y and is referred to as Y key. Next, this Takagi component Y is inputted to the nonlinear circuit 2. Its characteristic is to suppress the input of the positive part. The input/output characteristics shown here are an example of this, in which the output signal is set to 0 for a positive input signal, and is output as is for a negative input signal. As a result, the output signal of this nonlinear circuit 2 becomes as indicated by Y' day. The YH processed in this way is input to the modulator 3, and the other input signal, the color difference signal C-Y (C is R, B
or G) respectively.
この変調器３は、第３図に示すように乗算器４と加算器
５とで構成したものである。乗算器４の入力は色差信号
Ｃ−Ｙと信号Ｙ′日であり、その積（Ｃ−Ｙ）×ＹＨを
出力する。その出力は加算器５で元の色差信号Ｃ−Ｙと
加算して、変調した色差信号Ｃ′一Ｙとして出力する。
すなわち、Ｃ′−Ｙ′＝（Ｃ−Ｙ）ＹＨ＋（Ｃ−Ｙ）と
なる。このようにして変調した色差信号Ｃ′−Ｙを元の
色差信号Ｃ−Ｙの代わりに用いることによって、色差信
号に元来含まれていない高域の成分を含めることができ
、色画像を再生したときに着色部分の解像度を大水風こ
向上することができる。This modulator 3 is composed of a multiplier 4 and an adder 5 as shown in FIG. The inputs of the multiplier 4 are the color difference signal C-Y and the signal Y', and outputs the product (C-Y)×YH. The output is added to the original color difference signal CY in an adder 5 and output as a modulated color difference signal C'-Y.
That is, C'-Y'=(C-Y)YH+(C-Y). By using the color difference signal C'-Y modulated in this way in place of the original color difference signal C-Y, it is possible to include high-frequency components that are not originally included in the color difference signal, and reproduce the color image. When you do this, the resolution of the colored part can be greatly improved.
ここで、変調信号Ｙ日を非線形素子処理する非線形回路
２に図示のような特性のものを用いることにすれば、変
調後の色差信号を増加させる効果はなく、減少させる方
向のみ作用する。このようにすると、色差信号を増大す
ることによって画像がギラギラしたものになってしまう
ことを防止しつつ色解像度を向上することができて有効
である。すなわち、高域成分ＹＨには輝度信号Ｙの高城
成分が含まれているが、それは必らずしも色差信号Ｃ−
Ｙの増減方向と同じではない。このような場合に、色差
信号Ｃ−Ｙを減少させる方向にのみ補正をさせるように
すると、着色部分において色の濃い部分がさらに濃い方
向に微細に変化させられるために画像がギラギラした感
じになってしまうことを防止することができ、あたかも
色解像度のみ向上したような感じに見えるようにできる
ことになる。第４図に、使用し得る非線形回路２の特性
例を示す。Here, if the nonlinear circuit 2 that processes the modulated signal Y with a nonlinear element has the characteristics shown in the figure, it will not have the effect of increasing the modulated color difference signal, but will only work in the direction of decreasing it. This is effective because the color resolution can be improved while preventing the image from becoming glaring due to the increase in color difference signals. That is, although the high frequency component YH includes the Takagi component of the luminance signal Y, it does not necessarily include the color difference signal C-
It is not the same as the direction of increase/decrease in Y. In such a case, if the correction is made only in the direction of decreasing the color difference signal C-Y, the dark areas of the colored areas will be subtly changed to become even darker, making the image look glare. It is possible to prevent this from occurring, and it is possible to make it appear as if only the color resolution has been improved. FIG. 4 shows an example of the characteristics of the nonlinear circuit 2 that can be used.
ａのように負方向の入力信号に対しても非直線にするよ
うにしてもよく、また、ｂ，ｃのように、正方向の入力
信号にリミツタをかけて色差信号を増大する方向にある
場合でも目で見て不自然な状態に見えない程度にしてお
けば問題はない。このように、本発明の補償装置を用い
ることによって、色解像度を疑似的に向上した色画像を
得ることができ、また非直線回路を輝度信号の高域成分
経路に挿入することによって、画像の着色部分にさらに
濃い色で微細な変化を生じるために起る画像のギラギラ
した感じを防止することができ、見易い画像にすること
のできる効果の大きいものを得ることができるものであ
る。As shown in a, the input signal in the negative direction may also be made non-linear, and as shown in b and c, the color difference signal may be increased by applying a limiter to the input signal in the positive direction. Even in such cases, there is no problem as long as it does not look unnatural to the naked eye. As described above, by using the compensation device of the present invention, it is possible to obtain a color image with pseudo-improved color resolution, and by inserting a non-linear circuit into the high-frequency component path of the luminance signal, the image can be improved. It is possible to prevent the glare of the image caused by minute changes in darker colors in the colored parts, and to obtain a highly effective image that is easy to see.
第１図は本発明の一実施例における色解像度補償装置の
ブロック線図、第２図はその各部の波形図、第３図はそ
の一部の詳細なブロック線図、第４図ａ，ｂ，ｃはその
一部の特性図である。
１…・・・帯域分離回路、２・・・・・・非直線回路、
３・・・・・・変調回路。
繁１図
第２図
第３図
繁４図FIG. 1 is a block diagram of a color resolution compensating device according to an embodiment of the present invention, FIG. 2 is a waveform diagram of each part thereof, FIG. 3 is a detailed block diagram of a part thereof, and FIGS. 4 a and b , c is a characteristic diagram of a part thereof. 1...Band separation circuit, 2...Non-linear circuit,
3...Modulation circuit. Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
るフイルタを備えた帯域分離回路で高域成分の信号のみ
を取り出し、この高域成分の信号を非直線回路に加えて
正の部分のみを抑圧した補償用信号を作成し、この補償
用信号により映像の着色部分における色信号を変調して
その補償用信号の部分の色信号を上記高域成分の大きさ
に従って減少させるようにしたことを特徴とする色解像
度補償装置。1. Extract only the high-frequency component signal from the luminance signal using a band separation circuit equipped with a filter that has characteristics complementary to the band characteristics of the chrominance signal, and add this high-frequency component signal to a nonlinear circuit to extract only the positive part. A suppressed compensation signal is created, and the color signal in the colored portion of the video is modulated by this compensation signal, so that the color signal in the compensation signal portion is decreased in accordance with the magnitude of the high frequency component. Characteristic color resolution compensation device.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54118476A JPS6013638B2 (en) | 1979-09-14 | 1979-09-14 | color resolution compensator |
| US06/184,329 US4337479A (en) | 1979-09-13 | 1980-09-05 | Color resolution compensator |
| FR8019766A FR2465383A1 (en) | 1979-09-13 | 1980-09-12 | COLOR IMAGE RESOLUTION COMPENSATOR FOR COLOR TELEVISION RECEIVER |
| GB8029531A GB2061663B (en) | 1979-09-13 | 1980-09-12 | Colour resolution compensator |
| CA000360171A CA1153463A (en) | 1979-09-13 | 1980-09-12 | Color resolution compensator |
| DE19803034532 DE3034532A1 (en) | 1979-09-13 | 1980-09-12 | COMPENSATION CIRCUIT TO IMPROVE COLOR RESOLUTION |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54118476A JPS6013638B2 (en) | 1979-09-14 | 1979-09-14 | color resolution compensator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5650689A JPS5650689A (en) | 1981-05-07 |
| JPS6013638B2 true JPS6013638B2 (en) | 1985-04-08 |
Family
ID=14737611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54118476A Expired JPS6013638B2 (en) | 1979-09-13 | 1979-09-14 | color resolution compensator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6013638B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190049179A (en) * | 2017-11-01 | 2019-05-09 | 삼성전자주식회사 | Carbon-based nanocomposite, electrode and lithium air battery including carbon-based nanocomposite |
-
1979
- 1979-09-14 JP JP54118476A patent/JPS6013638B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190049179A (en) * | 2017-11-01 | 2019-05-09 | 삼성전자주식회사 | Carbon-based nanocomposite, electrode and lithium air battery including carbon-based nanocomposite |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5650689A (en) | 1981-05-07 |
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