【０００１】[0001]
【産業上の利用分野】本発明は、復号映像信号等の輝
度、色差信号よりＲ，Ｇ，Ｂ信号を生成する信号処理方
式に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing system for generating R, G, B signals from luminance and color difference signals of a decoded video signal or the like.
【０００２】[0002]
【従来の技術】従来、複合映像信号に代表されるＮＴＳ
Ｃ方式の映像信号は輝度信号、色差信号、同期信号等に
よりなりたっている。輝度Ｙ、色差Ｒ−Ｙ，Ｂ−Ｙがあ
りその帯域はそれぞれ輝度信号約４ＭＨｚ或はそれ以
上、色差信号約０．５ＭＨｚとされている。2. Description of the Related Art Conventionally, NTS represented by a composite video signal
The video signal of the C system is composed of a luminance signal, a color difference signal, a synchronizing signal and the like. There are luminance Y and color differences R-Y and B-Y, and the bands thereof are a luminance signal of about 4 MHz or more and a color difference signal of about 0.5 MHz, respectively.
【０００３】図２に従来の実施例を示す。FIG. 2 shows a conventional embodiment.
【０００４】図において、１１、１２は乗算器、１３は
入力されるＲ−Ｙ，Ｂ−Ｙに所定の係数を乗算器１１、
１２で乗算してこれを加算しＧ−Ｙを出力する加算器、
１４は入力するＹとＲ−Ｙを加算してＲを出力する加算
器、１５は入力するＹと加算器１３より出力するＧ−Ｙ
を加算してＧを出力する加算器、１６は入力するＹ，Ｂ
−Ｙを加算してＢを出力する加算器である。In the figure, 11 and 12 are multipliers, 13 is a multiplier 11 and a multiplier 11 and a predetermined coefficient to the input RY and BY.
An adder that multiplies by 12 and adds them to output G-Y,
Reference numeral 14 is an adder for adding the input Y and RY to output R, and 15 is the input Y and G-Y output from the adder 13.
Adder to output G and 16 to input Y, B
It is an adder that adds −Y and outputs B.
【０００５】上記構成において、Ｙは一般に、 Ｙ＝０．３０Ｒ＋０．５９Ｇ＋０．１１Ｂ で現わされるのでＧ＝Ｙは、 Ｇ−Ｙ＝−０．５１（Ｒ−Ｙ）−０．１９（Ｂ−Ｙ） で現わされる。In the above structure, Y is generally expressed as Y = 0.30R + 0.59G + 0.11B, so G = Y is G−Y = −0.51 (R−Y) −0.19 (B -Y).
【０００６】よって、上記Ｙ，Ｒ−Ｙ，Ｂ−Ｙ，Ｇ−Ｙ
より、Ｒ，Ｇ，Ｂが次式で得られる。Therefore, the above Y, RY, BY, GY
Therefore, R, G, and B are obtained by the following equation.
【０００７】 Ｒ＝（Ｒ−Ｙ）＋Ｙ Ｇ＝（Ｇ−Ｙ）＋Ｙ Ｂ＝（Ｂ−Ｙ）＋Ｙ そしてこのような処理を行いＲ，Ｇ，Ｂ信号を生成して
いた。R = (R−Y) + Y G = (G−Y) + Y B = (B−Y) + Y Then, such processing is performed to generate R, G, and B signals.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の方式でＲ，Ｇ，Ｂの信号を生成する場合、入
力信号は、輝度Ｙに比べて、色差Ｒ−Ｙ，Ｂ−Ｙの帯域
幅が狭く設定されているので図４ａのような波形になっ
ていた。そのため、これより信号処理しＲ，Ｇ，Ｂ信号
の生成を行うと図４ｂに示すような歪んだ波形となって
いた。However, in the case of generating R, G, B signals by such a conventional method, the input signal has a band of color differences R-Y, B-Y as compared with luminance Y. Since the width is set to be narrow, the waveform is as shown in FIG. 4a. Therefore, when signal processing is performed from this and R, G, and B signals are generated, a distorted waveform as shown in FIG. 4B is obtained.
【０００９】本発明は、このような波形歪みの発生を防
止することを目的とする。An object of the present invention is to prevent such waveform distortion from occurring.
【００１０】[0010]
【課題を解決するための手段】本発明は、この目的を達
成するため帯域幅の異なる少なくとも２種の信号を入力
信号とし、より広帯域の第一の入力信号の帯域幅を制限
するフィルター手段と、フィルター手段より出力される
信号と、第一の入力信号以外の入力信号とにより処理を
行う信号処理手段と、前記第一の入力信号を前記フィル
ター手段より出力される信号で除算する除算手段と、前
記信号処理手段の出力に前記除算手段の出力を乗算する
乗算手段を有する信号処理装置を提供するものである。In order to achieve this object, the present invention uses a filter means for inputting at least two kinds of signals having different bandwidths and limiting the bandwidth of a first input signal having a wider bandwidth. A signal processing unit that processes the signal output from the filter unit and an input signal other than the first input signal; and a dividing unit that divides the first input signal by the signal output from the filter unit. A signal processing device having a multiplication means for multiplying an output of the signal processing means by an output of the division means.
【００１１】[0011]
【作用】本発明に係る信号処理装置は、輝度信号の帯域
幅を色差信号の帯域幅と同程度になるようにローパスフ
ィルターを掛け、この輝度信号ＹＬと色差信号Ｒ−Ｙ，
Ｂ−ＹよりＲ，Ｇ，Ｂ信号の生成を行い、この各信号に
Ｙ／ＹＬを乗算することにより、より良好なＲ，Ｇ，Ｂ
信号を得ることを特徴とする。The signal processing apparatus according to the present invention applies a low-pass filter so that the bandwidth of the luminance signal becomes approximately equal to the bandwidth of the color difference signal, and the luminance signal YL and the color difference signal RY,
By generating R, G, B signals from BY, and multiplying each of these signals by Y / YL, better R, G, B signals can be obtained.
It is characterized by obtaining a signal.
【００１２】[0012]
【実施例】図１に本発明の実施例を示す。EXAMPLE FIG. 1 shows an example of the present invention.
【００１３】図において、１は入力する輝度信号の帯域
幅を色差信号の帯域幅と同程度にするためのローパスフ
ィルター、２は入力する輝度、色差信号を信号処理し
Ｒ，Ｇ，Ｂ信号の生成を行う信号処理部でありその詳細
は上記従来例と同等であるためここでは省略する。３は
輝度信号Ｙとローパスフィルター１の出力ＹＬを入力と
しＹ／ＹＬを出力する除算器、４，５，６は信号処理部
２で生成されたＲ，Ｇ，Ｂ信号に除算器３の出力Ｙ／Ｙ
Ｌを掛ける乗算器である。In the figure, 1 is a low-pass filter for making the bandwidth of an input luminance signal approximately the same as the bandwidth of a color difference signal, and 2 is a signal processing of the input luminance and color difference signals of R, G, B signals. This is a signal processing unit that performs generation, and the details thereof are the same as those of the above-described conventional example, and therefore will be omitted here. 3 is a divider that receives the luminance signal Y and the output YL of the low-pass filter 1 and outputs Y / YL, and 4, 5 and 6 are the outputs of the divider 3 to the R, G, B signals generated by the signal processing unit 2. Y / Y
It is a multiplier that multiplies by L.
【００１４】上記構成において、その動作について、図
３に示す各点における波形に従って説明する。The operation of the above structure will be described with reference to the waveform at each point shown in FIG.
【００１５】入力信号は従来例同様輝度Ｙに比べて、色
差Ｒ−Ｙ，Ｂ−Ｙの帯域幅が狭いので図３ａのような波
形となる。この信号をローパスフィルター１を介すこと
により、色差信号の帯域幅と同程度の帯域幅にすること
により図３ｂのような波形となる。Since the input signal has a narrower band width of the color differences RY and BY than the luminance Y as in the conventional example, it has a waveform as shown in FIG. 3a. By passing this signal through the low-pass filter 1 to have a bandwidth similar to that of the color difference signal, a waveform as shown in FIG. 3b is obtained.
【００１６】これを信号処理部２で処理してＲ，Ｇ，Ｂ
信号を生成すると図３ｃのような波形となり、従来例の
ような波形歪が生じない。This is processed by the signal processing unit 2 to obtain R, G, B
When the signal is generated, the waveform becomes as shown in FIG. 3c, and the waveform distortion unlike the conventional example does not occur.
【００１７】さらに、この波形と除算器３の図３ｄに示
す出力波形とを乗算器４，５，６で乗算すると図３ｅに
示すように高域成分が補償されたＲを生成することがで
きる。Further, when this waveform and the output waveform of the divider 3 shown in FIG. 3d are multiplied by the multipliers 4, 5 and 6, it is possible to generate R in which the high frequency component is compensated as shown in FIG. 3e. .
【００１８】尚、除算器３においてＹＬが０になること
を防ぐためにＹ／ＹＬの代わりに例えば、（Ｙ＋０．
１）／（ＹＬ＋０．１）のように所定定数即ち、オフセ
ットを加える等、何等かの方法を取ってもよい。In order to prevent YL from becoming 0 in the divider 3, instead of Y / YL, for example, (Y + 0.
1) / (YL + 0.1), a predetermined constant, that is, an offset may be added.
【００１９】また、信号処理部２は輝度、色差信号を信
号処理しＲ，Ｇ，Ｂ信号の生成を行う従来例と同等であ
るため、その処理過程における方式は問わない。Further, since the signal processing unit 2 is equivalent to the conventional example in which the luminance and color difference signals are processed to generate the R, G and B signals, the method in the processing process does not matter.
【００２０】[0020]
【発明の効果】以上の説明から容易に理解できるよう
に、本発明に係る信号処理装置は、帯域幅の異なる少な
くとも２種の信号を入力信号とし、より広帯域の第一の
入力信号の帯域幅を制限するフィルター手段と、フィル
ター手段より出力される信号と、第一の入力信号以外の
入力信号とにより処理を行う信号処理手段と、前記第一
の入力信号を前記フィルター手段より出力される信号で
除算する除算手段と、前記信号処理手段の出力に前記除
算手段の出力を乗算する乗算手段を有し、これにより、
より良好な色（Ｒ，Ｇ，Ｂ）信号を得ることができる。As can be easily understood from the above description, the signal processing apparatus according to the present invention uses at least two kinds of signals having different bandwidths as input signals, and has a wider bandwidth of the first input signal. Means for limiting the signal, a signal output from the filter means, a signal processing means for processing with an input signal other than the first input signal, and a signal output from the filter means for the first input signal And a multiplication means for multiplying the output of the signal processing means by the output of the division means.
A better color (R, G, B) signal can be obtained.
【図１】本発明の実施例の構成ブロック図である。FIG. 1 is a configuration block diagram of an embodiment of the present invention.
【図２】従来の実施例及び本発明の実施例の構成ブロッ
ク図である。FIG. 2 is a configuration block diagram of a conventional example and an example of the present invention.
【図３】本実施例の波形図である。FIG. 3 is a waveform diagram of the present embodiment.
【図４】従来例の波形図である。FIG. 4 is a waveform diagram of a conventional example.
１ ローパスフィルター ２ 信号処理部 ３ 除算器 ４，５，６ 乗算器 １１，１２ 乗算器 １３ 加算器 １４，１５，１６ 加算器 1 Low-pass filter 2 Signal processing unit 3 Divider 4, 5, 6 Multiplier 11, 12 Multiplier 13 Adder 14, 15, 16 Adder
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17678093AJPH0738915A (en) | 1993-07-16 | 1993-07-16 | Signal processor |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17678093AJPH0738915A (en) | 1993-07-16 | 1993-07-16 | Signal processor |
| Publication Number | Publication Date |
|---|---|
| JPH0738915Atrue JPH0738915A (en) | 1995-02-07 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17678093APendingJPH0738915A (en) | 1993-07-16 | 1993-07-16 | Signal processor |
| Country | Link |
|---|---|
| JP (1) | JPH0738915A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7688362B2 (en)* | 2004-03-05 | 2010-03-30 | Florida Atlantic University | Single sensor processing to obtain high resolution color component signals |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7688362B2 (en)* | 2004-03-05 | 2010-03-30 | Florida Atlantic University | Single sensor processing to obtain high resolution color component signals |
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| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal | Free format text:JAPANESE INTERMEDIATE CODE: A02 Effective date:20020416 |