JPS60244181A - Transmission system of component chrominance signal - Google Patents
Transmission system of component chrominance signalInfo
- Publication number
- JPS60244181A JPS60244181A JP59098671A JP9867184A JPS60244181A JP S60244181 A JPS60244181 A JP S60244181A JP 59098671 A JP59098671 A JP 59098671A JP 9867184 A JP9867184 A JP 9867184A JP S60244181 A JPS60244181 A JP S60244181A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- signals
- level
- circuit
- reference level
- 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
Landscapes
- Color Television Systems (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
この発明はコンポーネント色信号の伝送方式に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a transmission system for component color signals.
（従来技術とその問題点）
カラーテレビジョン信号をコンポーネント信号で伝送′
１−る場合、輝度信号（以下Ｙ信号と書く）と２つの色
差信号２例えば第１図（ａ）に示すＩ’１．− Ｙ信号
、第１図１ｂ）に示すＢ−Ｙ信号を伝送しなげればなら
ない。そして、各信号の伝送系では各信号のレベル関係
が異ならないように伝送する必要がある。もし、２つの
色差信号間でレベル関係が異なるようなことかあると１
色再現性が悪くなり。(Prior art and its problems) Transmission of color television signals using component signals'
1-, a luminance signal (hereinafter referred to as Y signal) and two color difference signals 2, for example I'1.1 as shown in FIG. 1(a). - Y signal, the B-Y signal shown in Figure 1 1b) must be transmitted. In the transmission system for each signal, it is necessary to transmit the signals so that the level relationship between the signals does not differ. If there is a difference in the level relationship between the two color difference signals, 1
Color reproducibility deteriorates.
また２本来日信号であるべき部分にも色が付く。Also, the parts that should have been traffic lights on the 2nd day are also colored.
白バランスずれの現象が現われる。従来は色再現性を良
くするため、また白バランスがずれないようにするため
、各伝送系の利得関係を忠実に合わせる作業を行なわな
ければならなかった。A phenomenon of white balance shift appears. Conventionally, in order to improve color reproducibility and to prevent white balance from shifting, it was necessary to faithfully match the gain relationships of each transmission system.
（目自り）
この発明は上記欠点を除去するため、第２図に示すよう
にＲ−Ｙ、Ｂ−Ｙ信号のブラッキング期間にレベル基準
信号を挿入し、伝送系の中でこのレベル基準信号が常に
同レベルになるようなＡ（ＥＣ回路を通すことによって
、Ｒ−Ｙ、Ｂ−Ｙのレベル関係を自動的に規定値に保っ
て伝送するようにしたものである。In order to eliminate the above-mentioned drawbacks, this invention inserts a level reference signal into the blacking period of the R-Y and B-Y signals as shown in FIG. By passing the A (EC circuit) through which the signals are always at the same level, the level relationship of R-Y and B-Y is automatically maintained at a specified value for transmission.
（実施例）
色差信号Ｉ（−Ｙ、Ｂ−Ｙ各信号のブランキング期間に
基準レベル信号を入れておく。色差信号の伝送路の中に
この基準レベル信号のレベルを一定にするＡ、ＧＣｕ路
を入れることによって基準レベル信号は常に一定となり
、このことから、Ｒ，−Ｙ。(Example) A reference level signal is inserted into the blanking period of each color difference signal I (-Y, B-Y signal. A, GCu is provided in the transmission path of the color difference signal to keep the level of this reference level signal constant. The reference level signal becomes always constant by introducing the signal R, -Y.
Ｂ−Ｙ信号間のレベル関係も一定関係に保つことができ
る。The level relationship between the BY signals can also be maintained constant.
以下この発明の実施例を第２図、第３図により説明する
。第２図ｔａ）はＲ−Ｙ信号、（ｂ）はＢ−Ｙ信号の波
形の一例でブランキング期間において基準レベル信号１
，２を付加する。この信号のレベルはＲ−Ｙ、Ｂ−Ｙ信
号の一定レベル関係を持たせておく。Embodiments of the present invention will be described below with reference to FIGS. 2 and 3. Figure 2 ta) is an example of the waveform of the R-Y signal, and (b) is an example of the waveform of the B-Y signal.
,2 are added. The level of this signal is set to have a constant level relationship with the R-Y and B-Y signals.
第３図ｔａｌはＲ−Ｙ信号のレベル制御回路で入力信号
５に第２図１ａ）に示す基準レベル信号１の付加された
Ｉ（−Ｙ信号を入れる。第３図（ｂ）はＢ−Ｙ信号のレ
ベル制御回路で入力信号１３に第２図（ｂ）に示す基準
レベル信号２の付加されたＢ−Ｙ信号を入れる。この時
の第３図の動作を説明する。Ｉ（−Ｙ信号はＡ（ＥＣ回
路６でレベルコントロール信号１２によって基準レベル
信号か一定のレベルとなって出力信号７となる。出力信
号７は基準レベル信号ケート回路８に送られ、ケートパ
ルス９によって基準レベル信号だけがケートされ、サン
プリングホールド回路１０へ送られる。サンプリングホ
ールド回路］０ではサンプリングパルス１１によって基
準レベル信号はサンプリングされ、基準レベル信号のレ
ベル情報か取り出される。この情報はレベルコントロー
ル信号１２として、Ａ、ＧＣ回路６へ送られる。第３図
ｔｂ）に示す１３−Ｙ信号のレベル制御回路も全く同様
に動作する。これ等のループによって、Ｒ−Ｙ出力信号
は基準レベル信号と一定レベル関係となり。FIG. 3 (tal) is a level control circuit for the R-Y signal, which inputs the I (-Y signal) to which the reference level signal 1 shown in FIG. 2 (1a) is added to the input signal 5. FIG. 3 (b) shows the B- The Y signal level control circuit inputs the BY signal to which the reference level signal 2 shown in FIG. 2(b) is added to the input signal 13.The operation shown in FIG. 3 at this time will be explained. The signal A (in the EC circuit 6, it becomes a reference level signal or a constant level by the level control signal 12 and becomes the output signal 7. The output signal 7 is sent to the reference level signal gate circuit 8, and the gate pulse 9 outputs only the reference level signal. is sampled and sent to the sampling hold circuit 10. In the sampling hold circuit 0, the reference level signal is sampled by the sampling pulse 11, and the level information of the reference level signal is extracted.This information is sent as the level control signal 12 to the A, The signal is sent to the GC circuit 6. The level control circuit for the 13-Y signal shown in FIG.
また１３−Ｙ出力信号は基準レベル信号と一定レベル関
係となる。Ｒ−Ｙ信号に付加した基準レベル信号とＢ−
Ｙ信号に付加した基準レベル信号を同じレベル関係にし
ておけば、各Ａ（３ＣＫよってコントロールされたＲ、
−Ｙ、Ｂ−Ｙ出力信号は常に一定のレベル関係となり１
色再現性が悪化することはなく、白バランスかすれるこ
ともない。Further, the 13-Y output signal has a constant level relationship with the reference level signal. The reference level signal added to the R-Y signal and the B-
If the reference level signal added to the Y signal has the same level relationship, each A (R controlled by 3CK,
-Y, B-Y output signals always have a constant level relationship 1
Color reproducibility does not deteriorate, and white balance does not become blurred.
（効果）
本発明によれはｌ’（−Ｙ、Ｂ−Ｙ信号の各伝送路のレ
ベル関係を従来のように精密に合わせる必要かなくなる
。また伝送路の温度特性による誤差もなくなる。また送
信側でＲ−Ｙ、Ｂ−Ｙのレベル関係を誤って送ったとし
ても、基準レベ１レ信号との関係が保たれていれば、自
動的にこの誤りを補止１−るように動作する。(Effects) According to the present invention, it is no longer necessary to precisely adjust the level relationship of each transmission line of the l'(-Y and B-Y signals as in the conventional case. Also, errors due to temperature characteristics of the transmission line are eliminated. Even if the side sends the wrong level relationship between R-Y and B-Y, if the relationship with the reference level 1 level signal is maintained, it will automatically work to correct this error. .
第１図は従来の色信号の波形図、第２図を土木発明の色
信号の波形図、第３図は本発明におげろ色信号のレベル
制御回路の実施例を示す）゛ロック財１である。
１：Ｒ，−Ｙ信号における基準レベル信号、２：Ｒ−Ｙ
信号における基準レベル信号、５：Ｒ−Ｙ信号、６ ：
ＡＧＣ回路、７：レベルコントロールされたＲ．−Ｙ
信号，８．１６：基準レベル信号ゲート回路，９Ｊ７：
基準レベル信号ゲーレζルス， １０．１８−基準レベ
ル信号サンプリングホールド回路，１２。
２０ニレベルコントロ一ル信号。
第１図Fig. 1 is a waveform diagram of a conventional color signal, Fig. 2 is a waveform diagram of a color signal invented by civil engineering, and Fig. 3 is an embodiment of a level control circuit for a black color signal according to the present invention. It is. 1: Reference level signal in R, -Y signal, 2: R-Y
Reference level signal in signal, 5: R-Y signal, 6:
AGC circuit, 7: level controlled R. -Y
Signal, 8.16: Reference level signal gate circuit, 9J7:
Reference level signal Gere ζ Lus, 10.18-Reference level signal sampling and holding circuit, 12. 20 level control signal. Figure 1
Claims (1)
たは記録、再生する場８において、あらかじめコンポー
ネント色信号のブランキング期間に基準レベル信号を挿
入し、伝送路の受端または再生側において、この基準レ
ベル信号が常に同じレベルになるようにＡＧＣ回路を動
作させることによって色信号（例えばＲ，−Ｙ、 Ｂ−
Ｙ信号）レベルが常に一定レベル関係を保持するように
したことを特徴とするコンポーネント色信号伝送方式。When transmitting, recording, or reproducing a color television signal as a component signal (8), a reference level signal is inserted in advance into the blanking period of the component color signal, and this reference level signal is always maintained at the receiving end or reproducing side of the transmission path. By operating the AGC circuit so that the color signals (e.g. R, -Y, B-
A component color signal transmission method characterized in that the (Y signal) level always maintains a constant level relationship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59098671A JPS60244181A (en) | 1984-05-18 | 1984-05-18 | Transmission system of component chrominance signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59098671A JPS60244181A (en) | 1984-05-18 | 1984-05-18 | Transmission system of component chrominance signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60244181A true JPS60244181A (en) | 1985-12-04 |
Family
ID=14225975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59098671A Pending JPS60244181A (en) | 1984-05-18 | 1984-05-18 | Transmission system of component chrominance signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60244181A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02194796A (en) * | 1989-01-24 | 1990-08-01 | Totoku Electric Co Ltd | Color video signal transmission system |
| JPH04304087A (en) * | 1991-03-29 | 1992-10-27 | Victor Co Of Japan Ltd | Waveform equalization system |
-
1984
- 1984-05-18 JP JP59098671A patent/JPS60244181A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02194796A (en) * | 1989-01-24 | 1990-08-01 | Totoku Electric Co Ltd | Color video signal transmission system |
| JPH04304087A (en) * | 1991-03-29 | 1992-10-27 | Victor Co Of Japan Ltd | Waveform equalization system |
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