JPH10126808A - Color band improvement device - Google Patents
Color band improvement deviceInfo
- Publication number
- JPH10126808A JPH10126808A JP27472796A JP27472796A JPH10126808A JP H10126808 A JPH10126808 A JP H10126808A JP 27472796 A JP27472796 A JP 27472796A JP 27472796 A JP27472796 A JP 27472796A JP H10126808 A JPH10126808 A JP H10126808A
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- Prior art keywords
- frequency
- signal
- primary color
- low
- color
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、色帯域改善装置に
係り、特に色信号の帯域を拡大することにより、色解像
度の向上を図るようにした色帯域改善装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color band improving device, and more particularly, to a color band improving device which improves a color resolution by expanding a band of a color signal.
【０００２】[0002]
【従来の技術】現在のＮＴＳＣテレビジョン放送の場合
は、カメラから出力された３原色信号(Ｒ，Ｇ，Ｂ）を
輝度信号(Ｙ)と色差信号(Ｒ−Ｙ，Ｂ−Ｙ)に変換し、帯
域制限した色差信号で色副搬送波を変調した搬送色信号
を輝度信号に加えて伝送する。色信号は、色に対しての
人間の視覚心理上の諸特性、すなわち色信号の高域成分
に対して感度が低いという事を利用して帯域制限されて
いる。2. Description of the Related Art In the case of current NTSC television broadcasting, three primary color signals (R, G, B) output from a camera are converted into a luminance signal (Y) and color difference signals (RY, BY). Then, a carrier chrominance signal obtained by modulating a chrominance subcarrier with a band-limited chrominance signal is added to a luminance signal and transmitted. The color signal is band-limited by utilizing various characteristics of human visual psychology with respect to color, that is, low sensitivity to high frequency components of the color signal.
【０００３】一方、最近のＮＴＳＣテレビジョン受像機
は、高画質化の動向から輝度信号に対し各種補正を行い
解像度の向上が図られており、このテレビジョン受像機
でＮＴＳＣテレビジョン放送信号を復調して表示した場
合、輝度信号に比較して色信号の帯域が狭いので、色変
化のある境界で色ニジミ等が問題とされるようになって
きいる。On the other hand, in recent NTSC television receivers, various corrections have been made to luminance signals to improve the resolution due to the trend of higher image quality, and this television receiver has demodulated NTSC television broadcast signals. When the image is displayed in such a manner, the band of the color signal is narrower than that of the luminance signal.
【０００４】図５は帯域制限された色差信号による再生
原色信号波形を示したものである。図５において、
（１）はカラーバー信号の輝度信号Ｙの波形、（２）は
カラーバー信号の帯域制限された色差信号（Ｒ−Ｙ）の
波形、（３）はカラーバー信号の帯域制限された色差信
号（Ｂ−Ｙ）の波形を示したものである。FIG. 5 shows a reproduced primary color signal waveform based on a band-limited color difference signal. In FIG.
(1) is the waveform of the color bar signal luminance signal Y, (2) is the color bar signal band-limited color difference signal (RY), and (3) is the color bar signal band-limited color difference signal. It shows the waveform of (BY).
【０００５】（２）の帯域制限された色差信号（Ｒ−
Ｙ）波形に（１）の輝度信号Ｙの波形を加算して（４）
に示すＲ再生原色信号を得る。また、（３）の帯域制限
された色差信号（Ｂ−Ｙ）波形に（１）の輝度信号Ｙの
波形を加算して（５）に示すＢ再生原色信号を得る。[0005] The color difference signal (R-
Y) The waveform of the luminance signal Y of (1) is added to the waveform (4)
(1) is obtained. Further, the waveform of the luminance signal Y of (1) is added to the band-limited color difference signal (BY) waveform of (3) to obtain a B reproduction primary color signal shown in (5).
【０００６】色差信号（Ｒ−Ｙ）および色差信号（Ｂ−
Ｙ）は帯域制限されているために高域成分がないので、
（４）のＲ再生原色信号および（５）のＢ再生原色信号
の波形は（１）の輝度信号Ｙの波形の高域成分を含む立
ち下がり部分で差分誤差を生じ、色ニジミ等の原因とな
る。The color difference signal (RY) and the color difference signal (B-
Since Y) has no high-frequency component due to band limitation,
The waveforms of the R reproduced primary color signal of (4) and the B reproduced primary color signal of (5) cause a difference error at the falling portion including the high-frequency component of the waveform of the luminance signal Y of (1), which causes color blur and the like. Become.
【０００７】この問題を解決するための各種手段が提案
されている。第１の改善手段として、色差信号の変化部
分を検出し、これから作られる二次微分成分を変化部分
に加算することにより、変化部分を急峻にして色信号の
過渡応答（色ニジミ）を改善しようとするものがある。Various means have been proposed to solve this problem. As a first improvement means, by detecting a changed portion of the color difference signal and adding a secondary differential component generated from the detected portion to the changed portion, the changed portion is sharpened to improve the transient response (color blur) of the color signal. There is something to say.
【０００８】また、第２の改善手段として、飽和度の高
い色信号（例えば、赤色）に対し、輝度信号の高域成分
を加算することにより、疑似的に色の鮮鋭感を向上させ
て色信号の過渡応答（色ニジミ）を改善しようとするも
のがある。[0008] As a second improvement means, by adding a high-frequency component of a luminance signal to a color signal having a high degree of saturation (for example, red), the sharpness of the color is improved in a pseudo manner. Some attempt to improve the transient response (color blur) of the signal.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、既に提
案されている第１の改善手段には、色信号の変化量が小
さい時、或いは飽和度が低い色信号に対しては変化量が
検出できず、補正ができないという課題がある。However, the first improvement means which has already been proposed is that when the amount of change in the color signal is small or the amount of change cannot be detected for a color signal with low saturation. There is a problem that correction cannot be performed.
【００１０】また、第１の改善手段には、色信号は帯域
制限されているため伝送された信号については補正でき
るが、帯域制限により失われた信号については補正がで
きないという課題がある。Further, the first improvement means has a problem that the color signal is band-limited, so that the transmitted signal can be corrected, but the signal lost due to the band limitation cannot be corrected.
【００１１】既に提案されている第２の改善手段には、
輝度信号の変化の方向と色信号の変化の方向が必ずしも
一致しているわけではないため、不具合な点が発生する
という課題がある。[0011] The second improvement means that has already been proposed includes:
Since the direction of change of the luminance signal and the direction of change of the chrominance signal do not always match, there is a problem in that a problem arises.
【００１２】本発明は、上記した従来技術の課題を解決
するためになされたものであって、その目的は、送信側
でのカメラ出力と同等の周波数帯域を持つ３原色信号を
再正し、色変化のある境界で色ニジミのない鮮鋭感のあ
る映像を再現することができる色帯域改善装置を提供す
ることにある。The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to correct three primary color signals having the same frequency band as the camera output on the transmission side, It is an object of the present invention to provide a color band improving apparatus capable of reproducing a sharp image without color blur at a boundary where color changes.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に本発明に係る色帯域改善装置（１）は、入力された輝
度信号（Ｙ）から、送信側における色信号の帯域制限周
波数以下の輝度成分を抽出して得た低域輝度信号（Ｙ
L）を出力する低域通過フィルタ（３）と、輝度信号
（Ｙ）から、色信号の帯域制限周波数を超えた任意の周
波数帯域の輝度成分を抽出して得た高域輝度信号（Ｙ
H）を出力する帯域通過フィルタ（２）と、低域輝度信
号（ＹL）と入力された色差信号（Ｒ−Ｙ，ＢーＹ）よ
り、３原色信号の低域成分である３種類の低域原色信号
（ＲL，ＧL，ＢL）を生成して出力するマトリックス手
段（４）と、低域輝度信号（ＹL）、高域輝度信号（Ｙ
H）および３種類の低域原色信号（ＲL，ＧL，ＢL）のそ
れぞれからエッジ部の信号を抽出し、低域輝度エッジ信
号（ＹLE）、高域輝度エッジ信号（ＹHE）および３種類
の低域原色エッジ信号（ＲLE，ＧLE，ＢLE）として出力
するエッジ部抽出手段（５）と、３種類の低域原色エッ
ジ信号（ＲLE，ＧLE，ＢLE）のそれぞれを低域輝度エッ
ジ信号（ＹLE）で除算を行なって、低域輝度エッジ信号
（ＹLE）に対する３種類の低域原色エッジ信号（ＲLE，
ＧLE，ＢLE）のそれぞれの混合比を求め、３種類の混合
比信号（ＫR，ＫG，ＫB）として出力する混合比演算手
段（６）と、３種類の混合比信号（ＫR，ＫG，ＫB）の
それぞれと高域輝度エッジ信号（ＹHE）との乗算を行な
って得た３種類の高域原色エッジ信号（ＲHE，ＧHE，Ｂ
HE）を出力する高域原色エッジ生成手段（７）と、３種
類の高域原色エッジ信号（ＲHE，ＧHE，ＢHE）を積分し
て得た３種類の高域原色信号（ＲH，ＧH，ＢH）を出力
する高域原色生成手段（８）と、３種類の低域原色信号
（ＲL，ＧL，ＢL）に、３種類の高域原色信号（ＲH，Ｇ
H，ＢH）をそれぞれ加算して得た、３種類の再生原色信
号（ＲLH，ＧLH，ＢLH）を出力する原色再生手段（９）
と、を備えたことを特徴とする。In order to achieve the above object, a color band improving apparatus (1) according to the present invention uses a luminance signal (Y) from a frequency band lower than or equal to a band limit frequency of a color signal on a transmitting side. A low-frequency luminance signal (Y
L) and a high-pass luminance signal (Y) obtained by extracting a luminance component of an arbitrary frequency band exceeding the band-limiting frequency of the color signal from the luminance signal (Y).
H), and a low-pass luminance signal (YL) and an input color difference signal (RY, BY) from the three low-frequency components of the three primary color signals. Matrix means (4) for generating and outputting gamut primary color signals (RL, GL, BL), a low-frequency luminance signal (YL), and a high-frequency luminance signal (Y
H) and three types of low-frequency primary color signals (RL, GL, BL) to extract edge signals, respectively, to obtain a low-frequency luminance edge signal (YLE), a high-frequency luminance edge signal (YHE), and three low-frequency luminance edge signals (YHE). Edge part extracting means (5) for outputting as gamut primary color edge signals (RLE, GLE, BLE), and each of three types of low-frequency primary color edge signals (RLE, GLE, BLE) as low-frequency luminance edge signals (YLE) By performing division, three types of low-frequency primary color edge signals (RLE,
GLE, BLE), and a mixing ratio calculating means (6) for obtaining three kinds of mixing ratio signals (KR, KG, KB) and outputting three kinds of mixing ratio signals (KR, KG, KB). Are multiplied by the high-frequency luminance edge signal (YHE) to obtain three types of high-frequency primary color edge signals (RHE, GHE, and BHE).
HE) and three types of high-frequency primary color signals (RH, GH, BH) obtained by integrating the three types of high-frequency primary color edge signals (RHE, GHE, BHE). ) And three types of low-frequency primary color signals (RL, GL, BL) and three types of high-frequency primary color signals (RH, G
H, BH), and outputs three types of reproduced primary color signals (RLH, GLH, BLH) obtained by adding primary color reproducing means (9).
And characterized in that:
【００１４】本発明に係る色帯域改善装置（１）は、低
域通過フィルタ（３）、帯域通過フィルタ（２）、マト
リックス手段（４）、エッジ部抽出手段（５）、混合比
演算手段（６）、高域原色エッジ生成手段（７）、高域
原色生成手段（８）および原色再生手段（９）を備えた
ので、伝送されていない色信号の高域成分を輝度信号か
ら分離して再生し、送信側でのカメラ出力と同等の周波
数帯域を持つ３原色信号を再生することができる。The color band improving apparatus (1) according to the present invention comprises a low-pass filter (3), a band-pass filter (2), a matrix means (4), an edge part extracting means (5), and a mixing ratio calculating means ( 6) Since it has high-frequency primary color edge generation means (7), high-frequency primary color generation means (8) and primary color reproduction means (9), it separates high-frequency components of color signals that are not transmitted from luminance signals. The three primary color signals having the same frequency band as the camera output on the transmission side can be reproduced.
【００１５】また、本発明に係る色帯域改善装置（２
０）は、入力されたカラーテレビジョン標準方式に準拠
した３原色信号（Ｒ，Ｇ，Ｂ）から輝度信号（Ｙ）を生
成して出力する輝度信号生成手段（２１）と、３原色信
号（Ｒ，Ｇ，Ｂ）から送信側における色信号の帯域制限
周波数以下の原色成分を抽出して得た３種類の低域原色
信号（ＲL，ＧL，ＢL）を出力する低域通過フィルタ
（３０，３１，３２）と、輝度信号から送信側における
色信号の帯域制限周波数以下の輝度成分を抽出して得た
低域輝度信号（ＹL）を出力する低域通過フィルタ（２
３）と、輝度信号（Ｙ）から、色信号の帯域制限周波数
を超えた任意の周波数帯域の輝度成分を抽出して得た高
域輝度信号（ＹH）を出力する帯域通過フィルタ（22）
と、低域輝度信号（ＹL）、高域輝度信号（ＹH）および
３種類の低域原色信号（ＲL，ＧL，ＢL）のそれぞれか
らエッジ部の信号を抽出し、低域輝度エッジ信号（ＹL
E）、高域輝度エッジ信号（ＹHE）および３種類の低域
原色エッジ信号（ＲLE，ＧLE，ＢLE）として出力するエ
ッジ部抽出手段（２５）と、３種類の低域原色エッジ信
号（ＲLE，ＧLE，ＢLE）のそれぞれを低域輝度エッジ信
号（ＹLE）で除算を行なって、低域輝度エッジ信号（Ｙ
LE）に対する３種類の低域原色エッジ信号（ＲLE，ＧL
E，ＢLE）のそれぞれの混合比を求め、３種類の混合比
信号（ＫR，ＫG，ＫB）として出力する混合比演算手段
（６）と、３種類の混合比信号（ＫR，ＫG，ＫB）のそ
れぞれと高域輝度エッジ信号（ＹHE）との乗算を行なっ
て得た３種類の高域原色エッジ信号（ＲHE，ＧHE，ＢH
E）を出力する高域原色エッジ生成手段（２７）と、３
種類の高域原色エッジ信号（ＲHE，ＧHE，ＢHE）を積分
して得た３種類の高域原色信号（ＲH，ＧH，ＢH）を出
力する高域原色生成手段（２８）と、３種類の低域原色
信号（ＲL，ＧL，ＢL）に、３種類の高域原色信号（Ｒ
H，ＧH，ＢH）をそれぞれ加算して得た３種類の再生原
色信号（ＲLH，ＧLH，ＢLH）を出力する原色再生手段
（２９）と、を備えたことを特徴とする。The color band improving apparatus (2) according to the present invention
0) is a luminance signal generating means (21) for generating and outputting a luminance signal (Y) from the input three primary color signals (R, G, B) based on the color television standard, and a three primary color signal (R). R, G, B). A low-pass filter (30, 30) that outputs three types of low-frequency primary color signals (RL, GL, BL) obtained by extracting primary color components below the band-limited frequency of the color signal on the transmission side. 31, 32) and a low-pass filter (2) that outputs a low-frequency luminance signal (YL) obtained by extracting a luminance component equal to or lower than the band-limiting frequency of the color signal on the transmission side from the luminance signal.
3) and a band-pass filter (22) for outputting a high-frequency luminance signal (YH) obtained by extracting a luminance component of an arbitrary frequency band exceeding the band-limiting frequency of the color signal from the luminance signal (Y).
And an edge signal is extracted from each of the low-frequency luminance signal (YL), the high-frequency luminance signal (YH), and the three types of low-frequency primary color signals (RL, GL, and BL), and the low-frequency luminance edge signal (YL)
E), an edge portion extracting means (25) for outputting as a high-frequency luminance edge signal (YHE) and three types of low-frequency primary color edge signals (RLE, GLE, BLE), and three types of low-frequency primary color edge signals (RLE, GLE, BLE) is divided by the low-frequency luminance edge signal (YLE) to obtain the low-frequency luminance edge signal (YLE).
LE) three types of low-frequency primary color edge signals (RLE, GL)
E, BLE), and a mixing ratio calculating means (6) for obtaining three kinds of mixing ratio signals (KR, KG, KB) and outputting three kinds of mixing ratio signals (KR, KG, KB). Are multiplied by a high-frequency luminance edge signal (YHE) to obtain three types of high-frequency primary color edge signals (RHE, GHE, and BH).
E) output high band primary color edge generating means (27);
High-frequency primary color generation means (28) for outputting three types of high-frequency primary color signals (RH, GH, BH) obtained by integrating the high-frequency primary color edge signals (RHE, GHE, BHE); The low band primary color signals (RL, GL, and BL) are added to three types of high band primary color signals (R
H, GH, and BH), and primary color reproduction means (29) for outputting three types of reproduction primary color signals (RLH, GLH, and BLH) obtained by adding the respective primary color signals.
【００１６】本発明に係る色帯域改善装置（２０）は、
輝度信号生成手段（２１）、低域通過フィルタ（３０，
３１，３２）、帯域通過フィルタ（２２）、エッジ部抽
出手段（２５）、混合比演算手段（２６）、高域原色エ
ッジ生成手段（２７）、高域原色生成手段（２８）およ
び原色再生手段（２９）を備えたので、カラーテレビジ
ョン標準方式に準拠した３原色信号から輝度信号を生成
し、伝送されていない色信号の高域成分を輝度信号から
分離して再生し、送信側でのカメラ出力と同等の周波数
帯域を持つ３原色信号を再生することができる。The color band improving device (20) according to the present invention comprises:
Luminance signal generating means (21), low-pass filter (30,
31, 32), band-pass filter (22), edge extraction means (25), mixing ratio calculation means (26), high-frequency primary color edge generation means (27), high-frequency primary color generation means (28), and primary color reproduction means Since (29) is provided, a luminance signal is generated from three primary color signals conforming to the color television standard system, a high-frequency component of a color signal which is not transmitted is separated from the luminance signal and reproduced, and the signal is transmitted to the transmission side. The three primary color signals having the same frequency band as the camera output can be reproduced.
【００１７】[0017]
【発明の実施の形態】本発明の実施の形態を添付図面に
基づいて以下に説明する。図１は本発明に係る色帯域改
善装置の第１実施例の全体ブロック構成図である。図１
において、色帯域改善装置１は、帯域通過フィルタ（Ｂ
ＰＦ）２、低域通過フィルタ（ＬＰＦ）３、マトリック
ス手段４、エッジ部抽出手段５、混合比演算手段６、高
域原色エッジ生成手段７、高域原色生成手段８、原色再
生手段９とを備える。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall block diagram of a first embodiment of a color band improving apparatus according to the present invention. FIG.
, The color band improving apparatus 1 includes a band pass filter (B
PF) 2, a low-pass filter (LPF) 3, a matrix means 4, an edge part extracting means 5, a mixing ratio calculating means 6, a high-frequency primary color edge generating means 7, a high-frequency primary color generating means 8, and a primary color reproducing means 9. Prepare.
【００１８】マトリックス手段４はマトリックス手段４
A、マトリックス手段４B、マトリックス手段４Cとから
なる。エッジ部抽出手段５は微分手段５A、微分手段５
B、微分手段５C、微分手段５D、微分手段５Eとからな
る。混合比演算手段６は除算手段６A、除算手段６B、除
算手段６Cとからなる。高域原色エッジ生成手段７は乗
算手段７A、乗算手段７B、乗算手段７Cとからなる。高
域原色生成手段８は積分手段８A、積分手段８B、積分手
段８Cとからなる。原色再生手段９は加算手段９A、加算
手段９B、加算手段９Cとからなる。The matrix means 4 is a matrix means 4
A, matrix means 4B and matrix means 4C. The edge extracting means 5 includes a differentiating means 5A and a differentiating means 5
B, differentiating means 5C, differentiating means 5D and differentiating means 5E. The mixing ratio calculating means 6 includes a dividing means 6A, a dividing means 6B, and a dividing means 6C. The high-frequency primary color edge generating means 7 includes a multiplying means 7A, a multiplying means 7B and a multiplying means 7C. The high-frequency primary color generating means 8 includes an integrating means 8A, an integrating means 8B, and an integrating means 8C. The primary color reproducing means 9 comprises an adding means 9A, an adding means 9B and an adding means 9C.
【００１９】端子Ｔ1に入力される輝度信号Ｙは数１の
ように示される。The luminance signal Y input to the terminal T1 is represented by the following equation (1).
【００２０】[0020]
【数１】Ｙ＝ＹL＋ＹH＝0.3(ＲL+ＲH)+0.59(ＧL+ＧH)+
0.11(ＢL+ＢH) 但し、ＹL：低域輝度信号，ＹH：高域輝度信号 ＲL：低域原色信号，ＧL：低域原色信号，ＢL：低域原
色信号 ＲH：高域原色信号，ＧH：高域原色信号，ＢH：高域原
色信号Y = YL + YH = 0.3 (RL + RH) +0.59 (GL + GH) +
0.11 (BL + BH) where YL: low-frequency luminance signal, YH: high-frequency luminance signal RL: low-frequency primary color signal, GL: low-frequency primary color signal, BL: low-frequency primary color signal RH: high-frequency primary color signal, GH: High frequency primary color signal, BH: High frequency primary color signal
【００２１】帯域通過フィルタ（ＢＰＦ）２は、端子Ｔ
1に入力された輝度信号Ｙから色信号の帯域制限周波数
（５００ＫＨｚ）を超えた任意の周波数帯域（例えば、
５００ＫＨｚ＜Ｆw≦２ＭＨｚ）の輝度成分を抽出し、
この抽出した輝度成分を高域輝度信号ＹHとしてエッジ
部抽出手段５の微分手段５Aに出力する。The bandpass filter (BPF) 2 has a terminal T
Any frequency band (for example, from the luminance signal Y input to 1) that exceeds the band-limited frequency (500 KHz) of the color signal (for example,
500 KHz <Fw ≦ 2 MHz)
The extracted luminance component is output to the differentiating means 5A of the edge part extracting means 5 as a high-frequency luminance signal YH.
【００２２】低域通過フィルタ（ＬＰＦ）３は、端子Ｔ
1に入力された輝度信号Ｙから送信側における色信号の
帯域制限周波数（５００ＫＨｚ）以下の輝度成分を抽出
して低域輝度信号ＹLをエッジ部抽出手段５の微分手段
５Bと、マトリックス手段４のマトリックス手段４A、マ
トリックス手段４Bおよびマトリックス手段４Cとに出力
する。The low-pass filter (LPF) 3 has a terminal T
A luminance component equal to or lower than the band-limiting frequency (500 KHz) of the color signal on the transmission side is extracted from the luminance signal Y input to 1 and the low-frequency luminance signal YL is differentiated by the differentiating means 5B of the edge extracting means 5 and the matrix means 4 Output to matrix means 4A, matrix means 4B and matrix means 4C.
【００２３】マトリックス手段４のマトリックス手段４
Aは、端子Ｔ2に入力された帯域制限された色差信号（Ｒ
−Ｙ）と低域輝度信号ＹLとに基づいて低域原色信号ＲL
を生成し、低域原色信号ＲLをエッジ部抽出手段５の微
分手段５Cと原色再生手段９の加算手段９Aとに出力す
る。マトリックス手段４のマトリックス手段４Bは、端
子Ｔ2に入力された帯域制限された色差信号（Ｒ−Ｙ）
と端子Ｔ3に入力された帯域制限された色差信号（Ｂ−
Ｙ）と低域輝度信号ＹLとに基づいて低域原色信号ＧLを
生成し、低域原色信号ＧLをエッジ部抽出手段５の微分
手段５Dと原色再生手段９の加算手段９Bとに出力する。
マトリックス手段４のマトリックス手段４Cは、端子Ｔ3
に入力された帯域制限された色差信号（Ｂ−Ｙ）と低域
輝度信号ＹLとに基づいて低域原色信号ＢLを生成し、低
域原色信号ＢLをエッジ部抽出手段５の微分手段５Eと原
色再生手段９の加算手段９Cとに出力する。The matrix means 4 of the matrix means 4
A is a band-limited color difference signal (R
-Y) and the low-frequency primary signal RL based on the low-frequency luminance signal YL.
And outputs the low-frequency primary color signal RL to the differentiating means 5C of the edge part extracting means 5 and the adding means 9A of the primary color reproducing means 9. The matrix means 4B of the matrix means 4 outputs the band-limited color difference signal (RY) input to the terminal T2.
And the band-limited color difference signal (B-
Y) and a low-frequency primary color signal GL based on the low-frequency luminance signal YL, and outputs the low-frequency primary color signal GL to the differentiating means 5D of the edge extracting means 5 and the adding means 9B of the primary color reproducing means 9.
The matrix means 4C of the matrix means 4 has a terminal T3
A low-frequency primary color signal BL based on the band-limited color difference signal (BY) and the low-frequency luminance signal YL input to The data is output to the adding means 9C of the primary color reproducing means 9.
【００２４】エッジ部抽出手段５の微分手段５Aは、高
域輝度信号ＹHを微分して高域輝度信号ＹHからエッジ情
報を抽出した高域輝度エッジ信号ＹHE（dＹH／dＴ）を
高域原色エッジ生成手段７の乗算手段７A、乗算手段７B
および乗算手段７Cに出力する。エッジ部抽出手段５の
微分手段５Bは、低域輝度信号ＹLを微分して低域輝度信
号ＹLからエッジ情報を抽出した低域輝度エッジ信号ＹL
E（dＹL／dＴ）を混合比演算手段６の除算手段６A、除
算手段６Bおよび除算手段６Cに出力する。The differentiating means 5A of the edge part extracting means 5 differentiates the high-frequency luminance signal YH to extract edge information from the high-frequency luminance signal YH and outputs the high-frequency luminance edge signal YHE (dYH / dT) to the high-frequency primary color edge. Multiplying means 7A and multiplying means 7B of generating means 7
And to the multiplication means 7C. The differentiating means 5B of the edge part extracting means 5 differentiates the low-frequency luminance signal YL and extracts edge information from the low-frequency luminance signal YL to produce a low-frequency luminance edge signal YL.
E (dYL / dT) is output to the dividing means 6A, the dividing means 6B and the dividing means 6C of the mixing ratio computing means 6.
【００２５】エッジ部抽出手段５の微分手段５Cは、低
域原色信号ＲLを微分して低域原色信号ＲLからエッジ情
報を抽出した低域原色エッジ信号ＲLE（dＲL／dＴ）を
混合比演算手段６の除算手段６Aに出力する。エッジ部
抽出手段５の微分手段５Dは、低域原色信号ＧLを微分し
て低域原色信号ＧLからエッジ情報を抽出した低域原色
エッジ信号ＧLE（dＧL／dＴ）を混合比演算手段６の除
算手段６Bに出力する。エッジ部抽出手段５の微分手段
５Eは、低域原色信号ＢLを微分して低域原色信号ＢLか
らエッジ情報を抽出した低域原色エッジ信号ＢLE（dＢL
／dＴ）を混合比演算手段６の除算手段６Cに出力する。The differentiating means 5C of the edge extracting means 5 differentiates the low-frequency primary color signal RL and extracts edge information from the low-frequency primary color signal RL to obtain a low-frequency primary color edge signal RLE (dRL / dT). 6 to the dividing means 6A. The differentiating means 5D of the edge part extracting means 5 differentiates the low-frequency primary color signal GL to extract edge information from the low-frequency primary color signal GL and divides the low-frequency primary color edge signal GLE (dGL / dT) by the mixing ratio calculating means 6 Output to means 6B. The differentiating means 5E of the edge part extracting means 5 differentiates the low-frequency primary color signal BL and extracts edge information from the low-frequency primary color signal BL to obtain a low-frequency primary color edge signal BLE (dBL
/ DT) is output to the dividing means 6C of the mixing ratio calculating means 6.
【００２６】混合比演算手段６の除算手段６Aは、低域
原色エッジ信号ＲLEを低域輝度エッジ信号ＹLEで除算を
行なって低域輝度エッジ信号ＹLEに対する低域原色エッ
ジ信号ＲLEの混合比を求め、混合比信号ＫR（ＲLE／ＹL
E）を高域原色エッジ生成手段７の乗算手段７Aに出力す
る。混合比演算手段６の除算手段６Bは、低域原色エッ
ジ信号ＧLEを低域輝度エッジ信号ＹLEで除算を行なって
低域輝度エッジ信号ＹLEに対する低域原色エッジ信号Ｇ
LEの混合比を求め、混合比信号ＫG（ＧLE／ＹLE）を高
域原色エッジ生成手段７の乗算手段７Bに出力する。混
合比演算手段６の除算手段６Cは、低域原色エッジ信号
ＢLEを低域輝度エッジ信号ＹLEで除算を行なって低域輝
度エッジ信号ＹLEに対する低域原色エッジ信号ＢLEの混
合比を求め、混合比信号ＫB（ＢLE／ＹLE）を高域原色
エッジ生成手段７の乗算手段７Cに出力する。The dividing means 6A of the mixing ratio calculating means 6 divides the low-frequency primary color edge signal RLE by the low-frequency luminance edge signal YLE to obtain the mixing ratio of the low-frequency primary color edge signal RLE to the low-frequency luminance edge signal YLE. , Mixing ratio signal KR (RLE / YL
E) is output to the multiplication means 7A of the high-frequency primary color edge generation means 7. The dividing means 6B of the mixing ratio calculating means 6 divides the low-frequency primary color edge signal GLE by the low-frequency luminance edge signal YLE to obtain a low-frequency primary color edge signal G for the low-frequency luminance edge signal YLE.
The mixing ratio of LE is obtained, and the mixing ratio signal KG (GLE / YLE) is output to the multiplying means 7B of the high-frequency primary color edge generating means 7. The dividing means 6C of the mixing ratio calculating means 6 divides the low-frequency primary color edge signal BLE by the low-frequency luminance edge signal YLE to obtain a mixing ratio of the low-frequency primary color edge signal BLE with respect to the low-frequency luminance edge signal YLE. The signal KB (BLE / YLE) is output to the multiplying means 7C of the high-frequency primary color edge generating means 7.
【００２７】高域原色エッジ生成手段７は、混合比演算
手段６で求めた低域輝度エッジ信号ＹLEに対する低域原
色エッジ信号（ＲLE，ＧLE，ＢLE）の低域混合比（Ｋ
R，ＫG，ＫB）が高域輝度エッジ信号ＹHEに対する高域
原色エッジ信号（ＲHE，ＧHE，ＢHE）の高域混合比と同
一か、または近似していると仮定して低域混合比に基づ
いて高域原色エッジ信号を生成するものである。The high-frequency primary color edge generating means 7 generates a low-frequency mixing ratio (KLE) of the low-frequency primary color edge signal (RLE, GLE, BLE) with respect to the low-frequency luminance edge signal YLE obtained by the mixing ratio calculating means 6.
R, KG, KB) is based on the low-frequency mixing ratio assuming that the high-frequency mixing ratio of the high-frequency primary color edge signals (RHE, GHE, BHE) with respect to the high-frequency luminance edge signal YHE is the same or approximate. To generate a high-frequency primary color edge signal.
【００２８】高域原色エッジ生成手段７の乗算手段７A
は、高域輝度エッジ信号ＹHEと混合比信号ＫRとの乗算
を行なって高域原色エッジ信号ＲHE（ＫR*ＹHE）を生成
し、高域原色エッジ信号ＲHEを高域原色生成手段８の積
分手段８Aに出力する。高域原色エッジ生成手段７の乗
算手段７Bは、高域輝度エッジ信号ＹHEと混合比信号ＫG
との乗算を行なって高域原色エッジ信号ＧHE（ＫG*ＹH
E）を生成し、高域原色エッジ信号ＧHEを高域原色生成
手段８の積分手段８Bに出力する。高域原色エッジ生成
手段７の乗算手段７Cは、高域輝度エッジ信号ＹHEと混
合比信号ＫBとの乗算を行なって高域原色エッジ信号ＢH
E（ＫB*ＹHE）を生成し、高域原色エッジ信号ＢHEを高
域原色生成手段８の積分手段８Cに出力する。Multiplication means 7A of high-frequency primary color edge generation means 7
Performs multiplication of the high-frequency luminance edge signal YHE and the mixture ratio signal KR to generate a high-frequency primary color edge signal RHE (KR * YHE), and integrates the high-frequency primary color edge signal RHE with the integrating means of the high-frequency primary color generation means 8 Output to 8A. The multiplying means 7B of the high-frequency primary color edge generating means 7 comprises a high-frequency luminance edge signal YHE and a mixing ratio signal KG.
With the high-frequency primary color edge signal GHE (KG * YH
E), and outputs the high-frequency primary color edge signal GHE to the integration means 8B of the high-frequency primary color generation means 8. The multiplying means 7C of the high-frequency primary color edge generating means 7 multiplies the high-frequency luminance edge signal YHE by the mixture ratio signal KB to obtain a high-frequency primary color edge signal BH.
E (KB * YHE) is generated, and the high-frequency primary color edge signal BHE is output to the integrating means 8C of the high-frequency primary color generating means 8.
【００２９】高域原色生成手段８の積分手段８Aは、高
域原色エッジ信号ＲHEの積分演算を行なって伝送されて
いない色信号の高域成分である高域原色信号ＲHを生成
し、高域原色信号ＲHを原色再生手段９の加算手段９Aに
出力する。高域原色生成手段８の積分手段８Bは、高域
原色エッジ信号ＧHEの積分演算を行なって伝送されてい
ない色信号の高域成分である高域原色信号ＧHを生成
し、高域原色信号ＧHを原色再生手段９の加算手段９Bに
出力する。高域原色生成手段８の積分手段８Cは、高域
原色エッジ信号ＢHEの積分演算を行なって伝送されてい
ない色信号の高域成分である高域原色信号ＢHを生成
し、高域原色信号ＢHを原色再生手段９の加算手段９Cに
出力する。The integrating means 8A of the high-frequency primary color generating means 8 performs an integration operation of the high-frequency primary color edge signal RHE to generate a high-frequency primary color signal RH, which is a high-frequency component of the color signal which has not been transmitted. The primary color signal RH is output to the adding means 9A of the primary color reproducing means 9. The integration means 8B of the high-frequency primary color generation means 8 performs an integration operation of the high-frequency primary color edge signal GHE to generate a high-frequency primary color signal GH which is a high-frequency component of the color signal which has not been transmitted, and generates a high-frequency primary color signal GH. Is output to the adding means 9B of the primary color reproducing means 9. The integrating means 8C of the high-frequency primary color generating means 8 performs an integration operation of the high-frequency primary color edge signal BHE to generate a high-frequency primary color signal BH which is a high-frequency component of the color signal not transmitted, and generates a high-frequency primary color signal BH Is output to the adding means 9C of the primary color reproducing means 9.
【００３０】原色再生手段９の加算手段９Aは、低域原
色信号ＲLと高域原色信号ＲHとの加算を行なって送信側
でのカメラ出力と同等の周波数帯域を持つ再生原色信号
ＲLHを再生して端子Ｔ4に出力する。原色再生手段９の
加算手段９Bは、低域原色信号ＧLと高域原色信号ＧHと
の加算を行なって送信側でのカメラ出力と同等の周波数
帯域を持つ再生原色信号ＧLHを再生して端子Ｔ5に出力
する。原色再生手段９の加算手段９Cは、低域原色信号
ＢLと高域原色信号ＢHとの加算を行なって送信側でのカ
メラ出力と同等の周波数帯域を持つ再生原色信号ＢLHを
再生して端子Ｔ6に出力する。The adding means 9A of the primary color reproducing means 9 adds the low-frequency primary color signal RL and the high-frequency primary color signal RH to reproduce the reproduced primary color signal RLH having the same frequency band as the camera output on the transmitting side. To the terminal T4. The adding means 9B of the primary color reproducing means 9 adds the low-frequency primary color signal GL and the high-frequency primary color signal GH to reproduce a reproduced primary color signal GLH having a frequency band equivalent to that of the camera output on the transmitting side, and outputs the reproduced signal to the terminal T5. Output to The adding means 9C of the primary color reproducing means 9 adds the low-frequency primary color signal BL and the high-frequency primary color signal BH to reproduce a reproduced primary color signal BLH having a frequency band equivalent to that of the camera output on the transmitting side, and outputs the reproduced signal to a terminal T6. Output to
【００３１】このように、色帯域改善装置１は、帯域通
過フィルタ（ＢＰＦ）２、低域通過フィルタ（ＬＰＦ）
３、マトリックス手段４、エッジ部抽出手段５、混合比
演算手段６、高域原色エッジ生成手段７、高域原色生成
手段８および原色再生手段９を備え、伝送されていない
色信号の高域成分を輝度信号から分離して再生し、送信
側でのカメラ出力と同等の周波数帯域を持つ再生原色信
号（ＲLH，ＧLH，ＢLH）を再生して出力することができ
る。As described above, the color band improving apparatus 1 includes the band pass filter (BPF) 2, the low pass filter (LPF)
3, a matrix means 4, an edge part extracting means 5, a mixing ratio calculating means 6, a high-frequency primary color edge generating means 7, a high-frequency primary color generating means 8 and a primary color reproducing means 9, and a high-frequency component of a color signal which is not transmitted Can be reproduced separately from the luminance signal, and the reproduced primary color signals (RLH, GLH, BLH) having the same frequency band as the camera output on the transmission side can be reproduced and output.
【００３２】図２は本発明に係る色帯域改善装置の第２
実施例の全体ブロック構成図である。図２において、色
帯域改善装置２０は、輝度信号生成手段２１、帯域通過
フィルタ（ＢＰＦ）２２、低域通過フィルタ（ＬＰＦ）
（２３，３０，３１，３２）、エッジ部抽出手段２５、
混合比演算手段２６、高域原色エッジ生成手段２７、高
域原色生成手段２８、原色再生手段２９とを備える。FIG. 2 shows a second embodiment of the color band improving apparatus according to the present invention.
FIG. 2 is an overall block configuration diagram of the embodiment. In FIG. 2, a color band improving device 20 includes a luminance signal generating unit 21, a band-pass filter (BPF) 22, and a low-pass filter (LPF).
(23, 30, 31, 32), edge part extracting means 25,
It comprises a mixing ratio calculating means 26, a high-frequency primary color edge generating means 27, a high-frequency primary color generating means 28, and a primary color reproducing means 29.
【００３３】エッジ部抽出手段２５は微分手段２５A、
微分手段２５B、微分手段２５C、微分手段２５D、微分
手段２５Eとからなる。混合比演算手段２６は除算手段
２６A、除算手段２６B、除算手段２６Cとからなる。高
域原色エッジ生成手段２７は乗算手段２７A、乗算手段
２７B、乗算手段２７Cとからなる。高域原色生成手段２
８は積分手段２８A、積分手段２８B、積分手段２８Cと
からなる。原色再生手段２９は加算手段２９A、加算手
段２９B、加算手段２９Cとからなる。The edge extracting means 25 includes differentiating means 25A,
It comprises differentiating means 25B, differentiating means 25C, differentiating means 25D and differentiating means 25E. The mixing ratio calculating means 26 includes a dividing means 26A, a dividing means 26B, and a dividing means 26C. The high-frequency primary color edge generation means 27 includes a multiplication means 27A, a multiplication means 27B and a multiplication means 27C. High range primary color generation means 2
Reference numeral 8 includes an integrating means 28A, an integrating means 28B, and an integrating means 28C. The primary color reproducing unit 29 includes an adding unit 29A, an adding unit 29B, and an adding unit 29C.
【００３４】色帯域改善装置２０は、入力されたカラー
テレビジョン標準方式に準拠した（即ち所定の帯域制限
を受けた）原色信号（Ｒ，Ｇ，Ｂ）から伝送されていな
い色信号の高域成分を再生し、送信側でのカメラ出力と
同等の周波数帯域を持つ再生原色信号（ＲLH，ＧLH，Ｂ
LH）を再生して出力するものである。色帯域改善装置２
０は、図１に示す色帯域改善装置１に輝度信号生成手段
２１を備え、また図１に示す色帯域改善装置１のマトリ
ックス手段４の代わりに低域通過フィルタ（ＬＰＦ）
（３０，３１，３２）を備える。The color band improving device 20 converts the high-frequency range of the untransmitted color signals from the primary color signals (R, G, B) conforming to the input color television standard (ie, having undergone a predetermined band limitation). Reproduce the primary color signals (RLH, GLH, B) having the same frequency band as the camera output on the transmitting side.
LH) is reproduced and output. Color band improvement device 2
0 is provided with a luminance signal generating means 21 in the color band improving apparatus 1 shown in FIG. 1 and a low pass filter (LPF) instead of the matrix means 4 of the color band improving apparatus 1 shown in FIG.
(30, 31, 32).
【００３５】ここでは、輝度信号生成手段２１と低域通
過フィルタ（ＬＰＦ）（３０，３１，３２）の動作を説
明し、他の構成は先に説明した色帯域改善装置１と同じ
なので、説明を省略する。Here, the operation of the luminance signal generating means 21 and the low-pass filters (LPF) (30, 31, 32) will be described, and the other configuration will be the same as that of the color band improving apparatus 1 described above. Is omitted.
【００３６】端子Ｔ21にはカラーテレビジョン標準方式
に準拠した原色信号Ｒ、端子Ｔ22にはカラーテレビジョ
ン標準方式に準拠した原色信号Ｇ、端子Ｔ23にはカラー
テレビジョン標準方式に準拠した原色信号Ｂが入力され
る。A terminal T21 is a primary color signal R conforming to the color television standard, a terminal T22 is a primary color signal G conforming to the color television standard, and a terminal T23 is a primary color signal B conforming to the color television standard. Is entered.
【００３７】端子Ｔ（21，22，23）に入力された原色信
号（Ｒ，Ｇ，Ｂ）は、それぞれ送信側における色信号の
帯域制限周波数（５００ＫＨｚ）以下の低域原色信号
（ＲL，ＧL，ＢL）と、色信号の帯域制限周波数（５０
０ＫＨｚ）を超えた高域輝度信号（ＹH）とからなる。
輝度信号生成手段２１は端子Ｔ（21，22，23）に入力さ
れた原色信号（Ｒ，Ｇ，Ｂ）から輝度信号Ｙを生成し、
輝度信号Ｙを帯域通過フィルタ（ＢＰＦ）２２および低
域通過フィルタ（ＬＰＦ）２３に出力する。The primary color signals (R, G, B) input to the terminals T (21, 22, 23) are low-frequency primary color signals (RL, GL) each of which is equal to or less than the band-limiting frequency (500 KHz) of the color signal on the transmitting side. , BL) and the band-limited frequency of the color signal (50).
(0 KHz).
The luminance signal generation means 21 generates a luminance signal Y from the primary color signals (R, G, B) input to the terminals T (21, 22, 23),
The luminance signal Y is output to a band-pass filter (BPF) 22 and a low-pass filter (LPF) 23.
【００３８】低域通過フィルタ（ＬＰＦ）３０は、端子
Ｔ21に入力された原色信号Ｒから送信側における色信号
の帯域制限周波数（５００ＫＨｚ）以下の低域原色信号
ＲLを抽出し、エッジ部抽出手段２５の微分手段２５Cに
出力する。低域通過フィルタ（ＬＰＦ）３１は、端子Ｔ
22に入力された原色信号Ｇから送信側における色信号の
帯域制限周波数（５００ＫＨｚ）以下の低域原色信号Ｇ
Lを抽出し、エッジ部抽出手段２５の微分手段２５Dに出
力する。低域通過フィルタ（ＬＰＦ）３２は、端子Ｔ23
に入力された原色信号Ｂから送信側における色信号の帯
域制限周波数（５００ＫＨｚ）以下の低域原色信号ＢL
を抽出し、エッジ部抽出手段２５の微分手段２５Eに出
力する。The low-pass filter (LPF) 30 extracts a low-frequency primary color signal RL equal to or lower than the band-limiting frequency (500 KHz) of the color signal on the transmission side from the primary color signal R input to the terminal T21, and extracts an edge portion. 25 to the differentiating means 25C. The low-pass filter (LPF) 31 has a terminal T
From the primary color signal G input to 22, a low-frequency primary color signal G equal to or lower than the band-limited frequency (500 KHz) of the color signal on the transmission side.
L is extracted and output to the differentiating means 25D of the edge part extracting means 25. The low-pass filter (LPF) 32 is connected to a terminal T23.
From the primary color signal B input to the low-frequency primary color signal BL below the band-limited frequency (500 KHz) of the color signal on the transmission side.
Is extracted and output to the differentiating means 25E of the edge part extracting means 25.
【００３９】このように、色帯域改善装置２０は、輝度
信号生成手段２１、帯域通過フィルタ（ＢＰＦ）２２、
低域通過フィルタ（ＬＰＦ）（２３，３０，３１，３
２）、エッジ部抽出手段２５、混合比演算手段２６、高
域原色エッジ生成手段２７、高域原色生成手段２８およ
び原色再生手段２９を備え、カラーテレビジョン標準方
式に準拠した３原色信号から輝度信号を生成し、伝送さ
れていない色信号の高域成分を輝度信号から分離して再
生し、送信側でのカメラ出力と同等の周波数帯域を持つ
再生原色信号（ＲLH，ＧLH，ＢLH）を再生して出力する
ことができる。特に、第１、第２実施例とも、微分手段
５Ａ（２５Ａ）および高域原色生成手段８（２８）を設
けたので、従来動作不安定になりがちな５００ＫＨｚ以
上の輝度信号成分が入来した場合でも、確実に色解像度
の改善が図られる。As described above, the color band improving device 20 includes the luminance signal generating means 21, the band-pass filter (BPF) 22,
Low-pass filter (LPF) (23, 30, 31, 3)
2) an edge part extracting means 25, a mixing ratio calculating means 26, a high-frequency primary color edge generating means 27, a high-frequency primary color generating means 28 and a primary color reproducing means 29, and a luminance from three primary color signals conforming to the color television standard system. Generates signals, reproduces high-frequency components of untransmitted color signals from luminance signals, reproduces them, and reproduces reproduced primary color signals (RLH, GLH, BLH) having the same frequency band as the camera output on the transmission side Can be output. In particular, in both the first and second embodiments, since the differentiating means 5A (25A) and the high-frequency primary color generating means 8 (28) are provided, a luminance signal component of 500 KHz or more, which tends to be unstable in the conventional operation, comes in. Even in this case, the color resolution is surely improved.
【００４０】図３および図４は本発明に係る色帯域改善
装置の第１実施例の各部の波形を示したものである。図
３の（１）は端子１に入力されるカラーバー信号の輝度
信号Ｙの波形を示す。FIGS. 3 and 4 show waveforms at various parts of the first embodiment of the color band improving apparatus according to the present invention. FIG. 3A shows a waveform of the luminance signal Y of the color bar signal input to the terminal 1.
【００４１】（２）は低域通過フィルタ（ＬＰＦ）３で
輝度信号Ｙから色信号の帯域制限周波数（５００ＫＨ
ｚ）以下の輝度成分を抽出した低域輝度信号ＹLの波形
を示す。（３）は帯域通過フィルタ（ＢＰＦ）２で入力
された輝度信号Ｙから色信号の帯域制限周波数（５００
ＫＨｚ）を超えた任意の周波数帯域（例えば、５００Ｋ
Ｈｚ＜Ｆw≦２ＭＨｚ）を抽出した高域輝度信号ＹHの波
形を示す。(2) is a low-pass filter (LPF) 3 for converting the luminance signal Y to the band-limited frequency of the chrominance signal (500 KH).
z) shows a waveform of the low-frequency luminance signal YL obtained by extracting the following luminance components. (3) is a band-limiting frequency (500) of the chrominance signal from the luminance signal Y input by the band-pass filter (BPF) 2.
KHz) (for example, 500K)
3 shows the waveform of the high-frequency luminance signal YH extracted from the frequency range of H.sub.H <Fw.ltoreq.2 MHz.
【００４２】（４）はマトリックス手段４Aでカラーバ
ー信号の帯域制限された色差信号（Ｒ−Ｙ）と低域輝度
信号ＹLとに基づいて生成した低域原色信号ＲLの波形を
示す。（５）はマトリックス手段４Bでカラーバー信号
の帯域制限された色差信号（Ｒ−Ｙ）とカラーバー信号
の帯域制限された色差信号（Ｂ−Ｙ）と低域輝度信号Ｙ
Lとに基づいて生成した低域原色信号ＧLの波形を示す。
（６）はマトリックス手段４Cでカラーバー信号の帯域
制限された色差信号（Ｂ−Ｙ）と低域輝度信号ＹLとに
基づいて生成した低域原色信号ＢLの波形を示す。(4) shows the waveform of the low-frequency primary color signal RL generated by the matrix means 4A based on the band-limited color difference signal (RY) of the color bar signal and the low-frequency luminance signal YL. (5) is a matrix means 4B for the band-limited color difference signal (RY) of the color bar signal, the band-limited color difference signal (BY) of the color bar signal, and the low-frequency luminance signal Y.
6 shows a waveform of a low-frequency primary color signal GL generated based on L.
(6) shows a waveform of the low-frequency primary color signal BL generated by the matrix means 4C based on the color difference signal (BY) of the color bar signal whose band is limited and the low-frequency luminance signal YL.
【００４３】（７）は原色再生手段９の加算手段９Aで
低域原色信号ＲLと高域原色信号ＲHとが加算され、送信
側でのカメラ出力と同等の周波数帯域を持つ再生原色信
号ＲLHの波形を示す。(7) The adding means 9A of the primary color reproducing means 9 adds the low-frequency primary color signal RL and the high-frequency primary color signal RH to generate a reproduced primary color signal RLH having the same frequency band as the camera output on the transmitting side. The waveform is shown.
【００４４】図４の（８）は端子１に入力されるカラー
バー信号の輝度信号Ｙの拡大波形を示す。（９）はエッ
ジ部抽出手段５の微分手段５Cで低域原色信号ＲLを一次
微分して（本例の場合には４００〜５００ＫＨＺ付近
の）エッジを抽出した低域原色エッジ信号ＲLEの波形を
示す。（１０）はエッジ部抽出手段５の微分手段５Bで
低域輝度信号ＹLを微分して低域輝度信号ＹLからエッジ
情報を抽出した低域輝度エッジ信号ＹLEの波形を示す。FIG. 4 (8) shows an enlarged waveform of the luminance signal Y of the color bar signal input to the terminal 1. (9) shows the waveform of the low-frequency primary-color edge signal RLE obtained by first-differentiating the low-frequency primary-color signal RL by the differentiating means 5C of the edge-part extracting means 5 and extracting edges (in the present example, around 400 to 500 KHZ). Show. (10) shows a waveform of the low-frequency luminance edge signal YLE obtained by differentiating the low-frequency luminance signal YL by the differentiating means 5B of the edge part extracting means 5 and extracting edge information from the low-frequency luminance signal YL.
【００４５】（１１）は混合比演算手段６の除算手段６
Aで、低域原色エッジ信号ＲLEを低域輝度エッジ信号ＹL
Eで除算を行なって低域輝度エッジ信号ＹLEに対する低
域原色エッジ信号ＲLEの混合比を求めた混合比信号ＫR
（ＲLE／ＹLE）の波形を示す。時間ｔ2の混合比信号ＫR
（ＲLE／ＹLE）において、分母の低域原色エッジ信号Ｙ
LEが零に近い値または零の値で分子の零でない低域原色
エッジ信号ＲLEの除算の時は混合比信号ＫRの値を所定
値ＫMで制限する。(11) The dividing means 6 of the mixing ratio calculating means 6
In A, the low-frequency primary color edge signal RLE is changed to the low-frequency luminance edge signal YL.
A mixture ratio signal KR obtained by dividing by E to obtain a mixture ratio of the low-frequency primary color edge signal RLE to the low-frequency luminance edge signal YLE.
The waveform of (RLE / YLE) is shown. Mixing ratio signal KR at time t2
(RLE / YLE), the low-frequency primary color edge signal Y of the denominator
At the time of division of the low-frequency primary color edge signal RLE of which the value of LE is close to zero or zero and the numerator is not zero, the value of the mixture ratio signal KR is limited by a predetermined value KM.
【００４６】（１２）はエッジ部抽出手段５の微分手段
５Aで高域輝度信号ＹHを微分して高域輝度信号ＹHから
エッジ情報を抽出した高域輝度エッジ信号ＹHEの波形を
示す。（１３）は高域原色エッジ生成手段７の乗算手段
７Aで高域輝度エッジ信号ＹHEと混合比信号ＫRとの乗算
を行なった高域原色エッジ信号ＲHE（ＫR*ＹHE）の波形
を示す。(12) shows a waveform of the high-frequency luminance edge signal YHE obtained by differentiating the high-frequency luminance signal YH by the differentiating means 5A of the edge portion extracting means 5 and extracting edge information from the high-frequency luminance signal YH. (13) shows a waveform of the high-frequency primary color edge signal RHE (KR * YHE) obtained by multiplying the high-frequency luminance edge signal YHE and the mixture ratio signal KR by the multiplying means 7A of the high-frequency primary color edge generating means 7.
【００４７】（１４）は高域原色生成手段８の積分手段
８Aで高域原色エッジ信号ＲHEを積分演算を行なった高
域原色信号ＲHの波形を示す。原色再生手段９の加算手
段９Ａで、（１４）の高域原色信号ＲHと（４）の低域
原色信号ＲLとの加算を行ない（７）に示す送信側での
カメラ出力と同等の周波数帯域を持つ再生原色信号ＲLH
を得る。(14) shows the waveform of the high-frequency primary color signal RH obtained by integrating the high-frequency primary color edge signal RHE by the integration means 8A of the high-frequency primary color generation means 8. The adding means 9A of the primary color reproducing means 9 adds the high-frequency primary color signal RH of (14) and the low-frequency primary color signal RL of (4), and has the same frequency band as the camera output on the transmission side shown in (7). Primary color signal RLH with
Get.
【００４８】なお、上記実施形態は本発明の一実施例で
あり、本発明は上記実施形態に限定されるものではな
い。The above embodiment is an example of the present invention, and the present invention is not limited to the above embodiment.
【００４９】[0049]
【発明の効果】本発明は上記構成により次の効果を発揮
する。本発明に係る色帯域改善装置は、入力された輝度
信号から、送信側における色信号の帯域制限周波数以下
の輝度成分を抽出して得た低域輝度信号を出力する低域
通過フィルタと、輝度信号から、色信号の帯域制限周波
数を超えた任意の周波数帯域の輝度成分を抽出して得た
高域輝度信号を出力する帯域通過フィルタと、低域輝度
信号と入力された色差信号より、３原色信号の低域成分
である３種類の低域原色信号を生成して出力するマトリ
ックス手段と、低域輝度信号、高域輝度信号および３種
類の低域原色信号のそれぞれからエッジ部の信号を抽出
し、低域輝度エッジ信号、高域輝度エッジ信号および３
種類の低域原色エッジ信号として出力するエッジ部抽出
手段と、３種類の低域原色エッジ信号のそれぞれを低域
輝度エッジ信号で除算を行なって、低域輝度エッジ信号
に対する３種類の低域原色エッジ信号のそれぞれの混合
比を求め、３種類の混合比信号として出力する混合比演
算手段と、３種類の混合比信号のそれぞれと高域輝度エ
ッジ信号との乗算を行なって得た３種類の高域原色エッ
ジ信号を出力する高域原色エッジ生成手段と、３種類の
高域原色エッジ信号を積分して得た３種類の高域原色信
号を出力する高域原色生成手段と、３種類の低域原色信
号に、３種類の高域原色信号をそれぞれ加算して得た、
３種類の再生原色信号を出力する原色再生手段と、を備
え、伝送されていない色信号の高域成分を輝度信号から
分離し、送信側でのカメラ出力と同等の周波数帯域を持
つ３原色信号を再生することができるので、色変化のあ
る境界で色ニジミがなく、色解像度の向上を図ることが
できる。According to the present invention, the following effects are exhibited by the above configuration. The color band improving apparatus according to the present invention includes: a low-pass filter that outputs a low-frequency luminance signal obtained by extracting a luminance component equal to or less than a band-limiting frequency of a color signal on a transmission side from an input luminance signal; A band-pass filter that outputs a high-frequency luminance signal obtained by extracting a luminance component of an arbitrary frequency band exceeding the band-limited frequency of the color signal from the signal; Matrix means for generating and outputting three types of low-frequency primary color signals, which are low-frequency components of the primary color signal, and an edge signal from each of the low-frequency luminance signal, the high-frequency luminance signal, and the three types of low-frequency primary color signals Extract the low-frequency luminance edge signal, the high-frequency luminance edge signal and 3
Edge portion extracting means for outputting as the low-frequency primary color edge signals, and dividing each of the three low-frequency primary color edge signals by the low-frequency luminance edge signal to obtain three types of low-frequency primary colors for the low-frequency luminance edge signal Mixing ratio calculating means for obtaining respective mixing ratios of the edge signals and outputting them as three types of mixing ratio signals, and three types of mixing ratio signals obtained by multiplying each of the three types of mixing ratio signals by the high-frequency luminance edge signal. A high-frequency primary color edge generating means for outputting a high-frequency primary color edge signal; a high-frequency primary color generating means for outputting three types of high-frequency primary color signals obtained by integrating three types of high-frequency primary color edge signals; The three types of high-frequency primary color signals were added to the low-frequency primary color signal, respectively,
Primary color reproducing means for outputting three types of reproduced primary color signals, wherein high-frequency components of untransmitted color signals are separated from luminance signals, and the three primary color signals have a frequency band equivalent to that of the camera output on the transmission side. Can be reproduced, so that there is no color blur at the boundary where the color changes, and the color resolution can be improved.
【００５０】また、本発明に係る色帯域改善装置は、入
力されたカラーテレビジョン標準方式に準拠した３原色
信号から輝度信号を生成して出力する輝度信号生成手段
と、３原色信号から送信側における色信号の帯域制限周
波数以下の原色成分を抽出して得た３種類の低域原色信
号を出力する低域通過フィルタと、輝度信号から送信側
における色信号の帯域制限周波数以下の輝度成分を抽出
して得た低域輝度信号を出力する低域通過フィルタと、
輝度信号から、色信号の帯域制限周波数を超えた任意の
周波数帯域の輝度成分を抽出して得た高域輝度信号を出
力する帯域通過フィルタと、低域輝度信号、高域輝度信
号および３種類の低域原色信号のそれぞれからエッジ部
の信号を抽出し、低域輝度エッジ信号、高域輝度エッジ
信号および３種類の低域原色エッジ信号として出力する
エッジ部抽出手段と、３種類の低域原色エッジ信号のそ
れぞれを低域輝度エッジ信号で除算を行なって、低域輝
度エッジ信号に対する３種類の低域原色エッジ信号のそ
れぞれの混合比を求め、３種類の混合比信号として出力
する混合比演算手段と、３種類の混合比信号のそれぞれ
と高域輝度エッジ信号との乗算を行なって得た３種類の
高域原色エッジ信号を出力する高域原色エッジ生成手段
と、３種類の高域原色エッジ信号を積分して得た３種類
の高域原色信号を出力する高域原色生成手段と、３種類
の低域原色信号に、３種類の高域原色信号をそれぞれ加
算して得た３種類の再生原色信号を出力する原色再生手
段と、を備え、カラーテレビジョン標準方式に準拠した
３原色信号から輝度信号を生成し、伝送されていない色
信号の高域成分を輝度信号から分離し、送信側でのカメ
ラ出力と同等の周波数帯域を持つ３原色信号を再生する
ことができるので、色変化のある境界で色ニジミがな
く、色解像度の向上を図ることができる。The color band improving apparatus according to the present invention comprises: a luminance signal generating means for generating and outputting a luminance signal from three primary color signals conforming to an input color television standard; And a low-pass filter that outputs three types of low-frequency primary color signals obtained by extracting primary color components below the band-limiting frequency of the color signal, and converting a luminance component below the band-limiting frequency of the color signal on the transmission side from the luminance signal. A low-pass filter that outputs a low-frequency luminance signal obtained by extraction,
A band-pass filter that outputs a high-frequency luminance signal obtained by extracting a luminance component of an arbitrary frequency band exceeding the band-limiting frequency of the color signal from the luminance signal, a low-frequency luminance signal, a high-frequency luminance signal, and three types. Edge portion extracting means for extracting a signal of an edge portion from each of the low-frequency primary color signals and outputting it as a low-frequency luminance edge signal, a high-frequency luminance edge signal, and three types of low-frequency primary color edge signals; A mixing ratio for dividing each of the primary color edge signals by the low-frequency luminance edge signal to obtain a mixing ratio of each of the three types of low-frequency primary color edge signals with respect to the low-frequency luminance edge signal is output as three types of mixing ratio signals. Arithmetic means, high-frequency primary color edge generating means for outputting three types of high-frequency primary color edge signals obtained by multiplying each of the three types of mixing ratio signals with the high-frequency luminance edge signal, and three types of high-frequency edges A high-frequency primary color generating means for outputting three types of high-frequency primary color signals obtained by integrating the color edge signals, and 3 obtained by adding three types of high-frequency primary color signals to three types of low-frequency primary color signals, respectively. Primary color reproducing means for outputting different types of reproduced primary color signals, generating a luminance signal from the three primary color signals conforming to the color television standard system, and separating a high-frequency component of the untransmitted color signal from the luminance signal. Since three primary color signals having the same frequency band as the camera output on the transmission side can be reproduced, color blur does not occur at the boundary where the color changes, and the color resolution can be improved.
【００５１】よって、入力された輝度信号、または入力
されたカラーテレビジョン標準方式に準拠した３原色信
号から色変化のある境界で色ニジミがなく、色解像度の
向上を図った色帯域改善装置を提供することができる。Accordingly, there is provided a color band improving apparatus which has no color blur at a boundary where a color change occurs from an input luminance signal or an input three primary color signal based on the color television standard system, and improves the color resolution. Can be provided.
【図１】本発明に係る色帯域改善装置の第１実施例の全
体ブロック構成図FIG. 1 is an overall block configuration diagram of a first embodiment of a color band improving device according to the present invention.
【図２】本発明に係る色帯域改善装置の第２実施例の全
体ブロック構成図FIG. 2 is an overall block diagram of a second embodiment of the color band improving apparatus according to the present invention.
【図３】本発明に係る色帯域改善装置の第１実施例の各
部の波形FIG. 3 is a waveform of each part of the first embodiment of the color band improving apparatus according to the present invention.
【図４】本発明に係る色帯域改善装置の第１実施例の各
部の波形FIG. 4 shows waveforms at various parts of the first embodiment of the color band improving apparatus according to the present invention.
【図５】帯域制限された色差信号による再生原色信号波
形FIG. 5 is a reproduction primary color signal waveform based on a band-limited color difference signal.
１…色帯域改善装置、２…帯域通過フィルタ（ＢＰ
Ｆ）、３…低域通過フィルタ（ＬＰＦ）、４…マトリッ
クス手段、４A，４B，４C…マトリックス手段、５…エ
ッジ部抽出手段、５A，５B，５C，５D，５E…微分手
段、６…混合比演算手段、６A，６B，６C…除算手段、
７…高域原色エッジ生成手段、７A，７B，７C…乗算手
段、８…高域原色生成手段、８A，８B，８C…積分手
段、９…原色再生手段、９A，９B，９C…加算手段、２
０…色帯域改善装置、２１…輝度信号生成手段、２２…
帯域通過フィルタ（ＢＰＦ）、２３，３０，３１，３２
…低域通過フィルタ（ＬＰＦ）、２５…エッジ部抽出手
段、２５A，２５B，２５C，２５D，２５E…微分手段、
２６…混合比演算手段、２６A，２６B，２６C…除算手
段、２７…高域原色エッジ生成手段、２７A，２７B，２
７C…乗算手段、２８…高域原色生成手段、２８A，２８
B，２８C…積分手段、２９…原色再生手段、２９A，２
９B，２９C…加算手段、ＫR，ＫG，ＫB…低域混合比、
Ｒ，Ｇ，Ｂ…カラーテレビジョン標準方式に準拠した原
色信号、ＲH，ＧH，ＢH…高域原色信号、ＲHE，ＧHE，
ＢHE…高域原色エッジ信号、ＲL，ＧL，ＢL…低域原色
信号、ＲLE，ＧLE，ＢLE…低域原色エッジ信号、ＲLH，
ＧLH，ＢLH…再生原色信号、Ｒ−Ｙ，Ｂ−Ｙ，…色差信
号、Ｔ1，Ｔ2，Ｔ3，Ｔ5，Ｔ6，Ｔ21，Ｔ22，Ｔ23，Ｔ2
4，Ｔ25，Ｔ26…端子、Ｙ…輝度信号、ＹH…高域輝度信
号、ＹHE…高域輝度エッジ信号、ＹL…低域輝度信号、
ＹLE…低域輝度エッジ信号。1: color band improving device, 2: band-pass filter (BP)
F), 3 low-pass filter (LPF), 4 matrix means, 4A, 4B, 4C matrix means, 5 edge extracting means, 5A, 5B, 5C, 5D, 5E differentiating means, 6 mixing Ratio calculating means, 6A, 6B, 6C ... dividing means,
7 high-frequency primary color edge generation means, 7A, 7B, 7C multiplication means, 8 high-frequency primary color generation means, 8A, 8B, 8C integration means, 9 primary color reproduction means, 9A, 9B, 9C addition means, 2
0: color band improving device, 21: luminance signal generating means, 22:
Band pass filters (BPF), 23, 30, 31, 32
... low-pass filter (LPF), 25 ... edge extraction means, 25A, 25B, 25C, 25D, 25E ... differentiation means,
26: mixture ratio calculating means, 26A, 26B, 26C: dividing means, 27: high-frequency primary color edge generating means, 27A, 27B, 2
7C multiplication means, 28 high-frequency primary color generation means, 28A, 28
B, 28C: integrating means, 29: primary color reproducing means, 29A, 2
9B, 29C: addition means, KR, KG, KB: low-frequency mixing ratio,
R, G, B: primary color signals based on the color television standard, RH, GH, BH: high-frequency primary color signals, RHE, GHE,
BHE: High-frequency primary color edge signal, RL, GL, BL: Low-frequency primary color signal, RLE, GLE, BLE: Low-frequency primary color edge signal, RLH,
GLH, BLH: reproduction primary color signal, RY, BY, ... color difference signal, T1, T2, T3, T5, T6, T21, T22, T23, T2
4, T25, T26: terminal, Y: luminance signal, YH: high-frequency luminance signal, YHE: high-frequency luminance edge signal, YL: low-frequency luminance signal,
YLE: low-frequency luminance edge signal.
Claims (2)
る色信号の帯域制限周波数以下の輝度成分を抽出して得
た低域輝度信号を出力する低域通過フィルタと、 前記輝度信号から、前記色信号の帯域制限周波数を超え
た任意の周波数帯域の輝度成分を抽出して得た高域輝度
信号を出力する帯域通過フィルタと、 前記低域輝度信号と入力された色差信号より、３原色信
号の低域成分である３種類の低域原色信号を生成して出
力するマトリックス手段と、 前記低域輝度信号、前記高域輝度信号および３種類の前
記低域原色信号のそれぞれからエッジ部の信号を抽出
し、低域輝度エッジ信号、高域輝度エッジ信号および３
種類の低域原色エッジ信号として出力するエッジ部抽出
手段と、 ３種類の前記低域原色エッジ信号のそれぞれを前記低域
輝度エッジ信号で除算を行なって、前記低域輝度エッジ
信号に対する３種類の前記低域原色エッジ信号のそれぞ
れの混合比を求め、３種類の混合比信号として出力する
混合比演算手段と、 ３種類の前記混合比信号のそれぞれと前記高域輝度エッ
ジ信号との乗算を行なって得た３種類の高域原色エッジ
信号を出力する高域原色エッジ生成手段と、 ３種類の前記高域原色エッジ信号を積分して得た３種類
の高域原色信号を出力する高域原色生成手段と、 ３種類の前記低域原色信号に、３種類の前記高域原色信
号をそれぞれ加算して得た、３種類の再生原色信号を出
力する原色再生手段と、を備えたことを特徴とする色帯
域改善装置。A low-pass filter that outputs a low-frequency luminance signal obtained by extracting a luminance component equal to or less than a band-limited frequency of a color signal on a transmission side from an input luminance signal; A band-pass filter that outputs a high-frequency luminance signal obtained by extracting a luminance component of an arbitrary frequency band exceeding the band-limiting frequency of the color signal; and a three-primary-color signal based on the low-frequency luminance signal and an input color difference signal. Matrix means for generating and outputting three types of low-frequency primary color signals, which are low-frequency components of: a signal of an edge portion from each of the low-frequency luminance signal, the high-frequency luminance signal, and the three types of low-frequency primary color signals Is extracted, and a low-frequency luminance edge signal, a high-frequency luminance edge signal, and 3
Edge portion extraction means for outputting as the low-frequency primary color edge signals; and three types of the low-frequency primary color edge signals are divided by the low-frequency luminance edge signal to obtain three types of low-frequency luminance edge signals. Mixing ratio calculating means for obtaining each mixing ratio of the low-frequency primary color edge signal and outputting the mixture ratio as three types of mixing ratio signals; and performing multiplication of each of the three types of the mixing ratio signals with the high-frequency luminance edge signal. High-frequency primary-color edge generating means for outputting three types of high-frequency primary-color edge signals obtained by the above-mentioned method, and a high-frequency primary color for outputting three types of high-frequency primary-color signals obtained by integrating the three types of high-frequency primary-color edge signals Generating means; and primary color reproducing means for outputting three types of reproduced primary color signals obtained by adding the three types of high frequency primary color signals to the three types of low frequency primary color signals, respectively. Color band break Good equipment.
に準拠した３原色信号から輝度信号を生成して出力する
輝度信号生成手段と、 前記３原色信号から送信側における色信号の帯域制限周
波数以下の原色成分を抽出して得た３種類の低域原色信
号を出力する低域通過フィルタと、 前記輝度信号から送信側における色信号の帯域制限周波
数以下の輝度成分を抽出して得た低域輝度信号を出力す
る低域通過フィルタと、 前記輝度信号から、前記色信号の帯域制限周波数を超え
た任意の周波数帯域の輝度成分を抽出して得た高域輝度
信号を出力する帯域通過フィルタと、 前記低域輝度信号、前記高域輝度信号および３種類の前
記低域原色信号のそれぞれからエッジ部の信号を抽出
し、低域輝度エッジ信号、高域輝度エッジ信号および３
種類の低域原色エッジ信号として出力するエッジ部抽出
手段と、 ３種類の前記低域原色エッジ信号のそれぞれを前記低域
輝度エッジ信号で除算を行なって、前記低域輝度エッジ
信号に対する３種類の前記低域原色エッジ信号のそれぞ
れの混合比を求め、３種類の混合比信号として出力する
混合比演算手段と、 ３種類の前記混合比信号のそれぞれと前記高域輝度エッ
ジ信号との乗算を行なって得た３種類の高域原色エッジ
信号を出力する高域原色エッジ生成手段と、 ３種類の前記高域原色エッジ信号を積分して得た３種類
の高域原色信号を出力する高域原色生成手段と、 ３種類の前記低域原色信号に、３種類の前記高域原色信
号をそれぞれ加算して得た３種類の再生原色信号を出力
する原色再生手段と、を備えたことを特徴とする色帯域
改善装置。2. A luminance signal generating means for generating and outputting a luminance signal from three primary color signals conforming to an input color television standard, and a luminance signal having a frequency equal to or less than a band limiting frequency of a color signal on a transmission side from the three primary color signals. A low-pass filter that outputs three types of low-frequency primary color signals obtained by extracting primary color components; and a low-frequency luminance obtained by extracting a luminance component equal to or less than a band-limited frequency of a color signal on a transmission side from the luminance signal. A low-pass filter that outputs a signal, and a band-pass filter that outputs a high-frequency luminance signal obtained by extracting a luminance component of an arbitrary frequency band exceeding a band-limiting frequency of the color signal from the luminance signal, An edge signal is extracted from each of the low-frequency luminance signal, the high-frequency luminance signal, and the three types of low-frequency primary color signals, and a low-frequency luminance edge signal, a high-frequency luminance edge signal, and 3
Edge portion extraction means for outputting as the low-frequency primary color edge signals; and three types of the low-frequency primary color edge signals are divided by the low-frequency luminance edge signal to obtain three types of low-frequency luminance edge signals. Mixing ratio calculating means for obtaining each mixing ratio of the low-frequency primary color edge signal and outputting the mixture ratio as three types of mixing ratio signals; and performing multiplication of each of the three types of the mixing ratio signals with the high-frequency luminance edge signal. High-frequency primary-color edge generating means for outputting three types of high-frequency primary-color edge signals obtained by the above-mentioned method, and a high-frequency primary color for outputting three types of high-frequency primary-color signals obtained by integrating the three types of high-frequency primary-color edge signals Generating means, and primary color reproducing means for outputting three types of reproduced primary color signals obtained by adding three types of the high frequency primary color signals to the three types of low frequency primary color signals, respectively. Color band improvement apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27472796A JPH10126808A (en) | 1996-10-17 | 1996-10-17 | Color band improvement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27472796A JPH10126808A (en) | 1996-10-17 | 1996-10-17 | Color band improvement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10126808A true JPH10126808A (en) | 1998-05-15 |
Family
ID=17545741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27472796A Pending JPH10126808A (en) | 1996-10-17 | 1996-10-17 | Color band improvement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10126808A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008228166A (en) * | 2007-03-15 | 2008-09-25 | Nec Engineering Ltd | Video/sound level checker |
| JP2017228898A (en) * | 2016-06-21 | 2017-12-28 | キヤノン株式会社 | Image processing apparatus and image processing method, computer program |
-
1996
- 1996-10-17 JP JP27472796A patent/JPH10126808A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008228166A (en) * | 2007-03-15 | 2008-09-25 | Nec Engineering Ltd | Video/sound level checker |
| JP4593582B2 (en) * | 2007-03-15 | 2010-12-08 | Ｎｅｃエンジニアリング株式会社 | Audiovisual level checker |
| JP2017228898A (en) * | 2016-06-21 | 2017-12-28 | キヤノン株式会社 | Image processing apparatus and image processing method, computer program |
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