JPS6219113B2 - - Google Patents
Info
- Publication number
- JPS6219113B2 JPS6219113B2 JP17258384A JP17258384A JPS6219113B2 JP S6219113 B2 JPS6219113 B2 JP S6219113B2 JP 17258384 A JP17258384 A JP 17258384A JP 17258384 A JP17258384 A JP 17258384A JP S6219113 B2 JPS6219113 B2 JP S6219113B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- hue
- supplied
- color
- phase
- 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
- 230000003111 delayed effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 1
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
- H04N9/643—Hue control means, e.g. flesh tone control
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】
この発明は、カラーテレビジヨン受像機の特に
画面の色相調整部に関し、特にバースト信号に対
して一定の位相差を有する信号を形成して、その
信号を基準として簡単にかつ自動的に画面の色相
調整ができるようにしたものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hue adjustment section of a screen of a color television receiver, in particular, which forms a signal having a certain phase difference with respect to a burst signal, and easily adjusts the hue using that signal as a reference. Moreover, the hue of the screen can be automatically adjusted.
従来、カラーテレビジヨン受像機において色相
調整をするには、記憶色と比較が容易な肌色例え
ば人の顔の肌色を画面上でみながら、この顔の肌
色がその者の希望する色相となるようにしてい
る。しかしながら、画面上の画像は変化が早く、
色相調整は大変難しくやつかいなものであつた。 Conventionally, to adjust the hue on a color television receiver, you need to look at a skin color that is easy to compare with the memory color, such as the skin color of a person's face, on the screen, and then adjust the color so that the skin color of the face becomes the hue desired by the person. I have to. However, the image on the screen changes quickly,
Hue adjustment was extremely difficult and difficult.
この発明はこの点に鑑み、自動的に色相調整が
できるようにしたものである。 In view of this point, the present invention enables automatic hue adjustment.
以下、この発明によるカラーテレビジヨン受像
機の例を、記憶色と比較が容易な肌色の位相の信
号を形成してこれを基準として色相調整をする場
合を例にとつて説明しよう。 Hereinafter, an example of a color television receiver according to the present invention will be described, taking as an example a case where a signal of a skin color phase that can be easily compared with a memory color is formed and hue adjustment is performed using this signal as a reference.
第１図において１は映像検波器で、これよりの
検波出力が第１映像増幅器２を通じて第２映像増
幅器３に供給されて、これより輝度信号Ｙが取出
される。一方、第１映像増幅器２よりの信号が同
期分離回路５に供給され、これより垂直同期信号
Pv（第２図Ａ）及び水平同期信号ＰH（同図Ｂ）
が取出され、これがゲート信号形成回路２７に供
給されて、これより垂直ブランキング期間だけ
「１」となるゲート信号ＳG（第２図Ｃ）が得られ
る。そしてこのゲート信号ＳGがゲート回路２
２，２８に供給され、これらのゲート回路が垂直
期間だけオンとされる。 In FIG. 1, reference numeral 1 denotes a video detector, the detection output of which is supplied through a first video amplifier 2 to a second video amplifier 3, from which a luminance signal Y is extracted. On the other hand, the signal from the first video amplifier 2 is supplied to the synchronization separation circuit 5, from which the vertical synchronization signal
Pv (Figure 2A) and horizontal synchronization signal P H (Figure 2B)
is taken out and supplied to the gate signal forming circuit 27, from which a gate signal S G (FIG. 2C) which becomes "1" only during the vertical blanking period is obtained. And this gate signal S G is the gate circuit 2
2 and 28, and these gate circuits are turned on only during the vertical period.
一方、第１映像増幅器２の出力信号が帯域増幅
器９に供給されて、これより搬送色信号Scが取
出されて、これがカラーレベル調整器１０を通じ
て加算器３０に供給される。また、帯域増幅器９
より搬送色信号Scがバーストゲート回路１２に
供給されて、これよりバースト信号ＳBが取出さ
れ、このバースト信号ＳBが発振器１３に供給さ
れ、これにより第３図に示すようにバースト信号
ＳBと同じ−（Ｂ−Ｙ）軸に一致した位相の連続波
信号S0が得られる。この連続波信号S0が移相器１
４に供給されてその位相が54度だけ遅らされ、こ
れより第３図に示すような肌色の位層の信号ＳF
が得られ、これがレベル調整器２９とゲート回路
２８を通じて加算器３０に供給される。 On the other hand, the output signal of the first video amplifier 2 is supplied to a bandpass amplifier 9, from which a carrier color signal Sc is extracted and supplied to an adder 30 through a color level adjuster 10. In addition, the band amplifier 9
The carrier color signal Sc is supplied to the burst gate circuit 12, from which the burst signal S B is extracted, and this burst signal S B is supplied to the oscillator 13, thereby generating the burst signal S B as shown in FIG. A continuous wave signal S0 whose phase coincides with the -(B-Y) axis is obtained. This continuous wave signal S 0 is the phase shifter 1
4, its phase is delayed by 54 degrees, and from this a skin tone layer signal S F as shown in FIG.
is obtained and supplied to the adder 30 through the level adjuster 29 and gate circuit 28.
この場合、カラーレベル調整器１０の制御電圧
１６の電圧を調整することによつてカラーレベル
調整器１０において搬送色信号の振幅が変えられ
る。そして、加算器３０に得られる信号が復調器
１７及び１８に供給される。一方、発振器１３よ
りの信号S0が色相調整器１９に供給されて、信号
S0の位相が調整され、この調整された信号が移相
器２０において位相が90゜遅らされ、また移相器
２１において位相が180゜遅らされて、それぞれ
よりＲ−Ｙ軸及びＢ−Ｙ軸の復調軸とされる信号
S1及びS2が得られる。信号S1は復調器１７に供給
され、信号S2は復調器１８にそれぞれ供給されて
復調器１７及び１８において加算器３０よりの信
号が復調される。 In this case, by adjusting the voltage of the control voltage 16 of the color level regulator 10, the amplitude of the carrier color signal is changed in the color level regulator 10. The signal obtained by adder 30 is then supplied to demodulators 17 and 18. On the other hand, the signal S0 from the oscillator 13 is supplied to the hue adjuster 19, and the signal
The phase of S 0 is adjusted, and this adjusted signal is delayed in phase by 90 degrees in phase shifter 20 and delayed by 180 degrees in phase shifter 21, and − Signal used as demodulation axis of Y axis
S 1 and S 2 are obtained. The signal S 1 is supplied to a demodulator 17, the signal S 2 is supplied to a demodulator 18, and the signals from the adder 30 are demodulated in the demodulators 17 and 18, respectively.
そして、復調器１８よりの復調出力がゲート回
路２２に供給される。このゲート回路２２は前述
のように信号ＳGが「１」となる期間だけオンと
され、その出力が比較器２３に供給されて基準電
圧Ecと比較されてこれより両電圧の差が取出さ
れ、この差の電圧がホールド回路２４でホールド
されて色相調整回路１９に供給される。この場
合、制御電圧源１６の電圧を変えたときはこれと
連動して基準電圧Ecが変化するが、基準電圧Ec
を変えたときには制御電圧源１６は変わらないよ
うになされている。 The demodulated output from the demodulator 18 is then supplied to the gate circuit 22. As mentioned above, this gate circuit 22 is turned on only during the period when the signal S G is "1", and its output is supplied to the comparator 23 and compared with the reference voltage Ec, from which the difference between the two voltages is extracted. , this difference voltage is held by the hold circuit 24 and supplied to the hue adjustment circuit 19. In this case, when the voltage of the control voltage source 16 is changed, the reference voltage Ec changes in conjunction with this, but the reference voltage Ec
When the voltage is changed, the control voltage source 16 remains unchanged.
本発明においては次のようにして色相調整が自
動的にできる。すなわち、移相器１４よりの肌色
の位相の信号ＳFが垂直ブランキング期間のみ復
調器１７，１８に供給されて検波される。そし
て、ゲート回路２２からは復調器１８の出力中の
肌色の色相の信号ＳFの検波出力が取出され、こ
れと基準電圧Ecとの差の電圧に応じて色相調整
器１９が制御されて、復調器１８の出力中の肌色
の色相の信号ＳFの検波出力が第３図においてＳF
Ｂで示す一定の値になるように受信画像の色相が
自動的に適正なものに調整される。 In the present invention, hue adjustment can be automatically performed in the following manner. That is, the skin color phase signal S F from the phase shifter 14 is supplied to the demodulators 17 and 18 and detected only during the vertical blanking period. Then, the detection output of the skin color hue signal SF output from the demodulator 18 is taken out from the gate circuit 22, and the hue adjuster 19 is controlled according to the voltage difference between this and the reference voltage Ec. In FIG. 3, the detection output of the skin color hue signal S F output from the demodulator 18 is S F
The hue of the received image is automatically adjusted to an appropriate value so as to have a constant value indicated by B.
このようにすることによつて受像画像の色相が
常に自動的に適正なものに調整される。 By doing this, the hue of the received image is always automatically adjusted to an appropriate hue.
以上述べたようにこの発明によれば、バースト
信号に対して一定の位相差を有する色相調整用の
基準信号を形成して、これを利用することによつ
て自動的に色相調整をすることができる。 As described above, according to the present invention, it is possible to automatically adjust the hue by forming a reference signal for hue adjustment having a certain phase difference with respect to the burst signal and using this. can.
なお、基準の色相の信号は肌色の色相の信号に
限らず、何色の色相でもよい。 Note that the reference hue signal is not limited to a skin color hue signal, and may be any hue signal.
第１図はこの発明によるカラーテレビジヨン受
像機の系統図、第２図及び第３図はその説明のた
めの波形図及びベクトル図である。
１は映像検波器、２及び３は第１及び第２映像
増幅器、５は同期分離回路、９は帯域増幅器、１
２はバーストゲート回路、１３は発振器、１４は
移相器、１７及び１８は復調器、１９は色相調整
器、２２はゲート回路、２３は比較器、２４はホ
ールド回路、２７はゲート信号形成回路である。
FIG. 1 is a system diagram of a color television receiver according to the present invention, and FIGS. 2 and 3 are waveform diagrams and vector diagrams for explaining the same. 1 is a video detector, 2 and 3 are first and second video amplifiers, 5 is a synchronous separation circuit, 9 is a band amplifier, 1
2 is a burst gate circuit, 13 is an oscillator, 14 is a phase shifter, 17 and 18 are demodulators, 19 is a hue adjuster, 22 is a gate circuit, 23 is a comparator, 24 is a hold circuit, 27 is a gate signal forming circuit It is.
Claims (1)
の位相差を有する色相調整用の基準信号を形成
し、この基準信号を搬送色信号とともに復調器に
供給し、上記バースト信号と同じ位相の連続波信
号を色相調整回路を介して上記復調器に供給して
上記基準信号と上記搬送色信号を検波し、上記基
準信号の検波出力をゲート回路を介して比較器に
供給して基準電圧と比較し、上記比較器の出力を
上記色相調整回路に供給して上記検波出力の大き
さが所望のものとなるように上記連続波の位相を
制御し、自動的に色相調整を行なうようにしたカ
ラーテレビジヨン受像機。1 Form a reference signal for hue adjustment having a certain phase difference with respect to the burst signal as a reference, supply this reference signal to a demodulator together with a carrier color signal, and generate a continuous wave signal having the same phase as the burst signal. is supplied to the demodulator via a hue adjustment circuit to detect the reference signal and the carrier color signal, and the detected output of the reference signal is supplied to a comparator via a gate circuit to be compared with a reference voltage; A color television in which the output of the comparator is supplied to the hue adjustment circuit to control the phase of the continuous wave so that the detected output has a desired magnitude, thereby automatically adjusting the hue. receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17258384A JPS6068791A (en) | 1984-08-20 | 1984-08-20 | Color television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17258384A JPS6068791A (en) | 1984-08-20 | 1984-08-20 | Color television receiver |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14887875A Division JPS6011878B2 (en) | 1975-12-12 | 1975-12-12 | color television receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6068791A JPS6068791A (en) | 1985-04-19 |
| JPS6219113B2 true JPS6219113B2 (en) | 1987-04-27 |
Family
ID=15944532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17258384A Granted JPS6068791A (en) | 1984-08-20 | 1984-08-20 | Color television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6068791A (en) |
-
1984
- 1984-08-20 JP JP17258384A patent/JPS6068791A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6068791A (en) | 1985-04-19 |
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