JPS6048688A - Television receiver - Google Patents
Television receiverInfo
- Publication number
- JPS6048688A JPS6048688A JP58156837A JP15683783A JPS6048688A JP S6048688 A JPS6048688 A JP S6048688A JP 58156837 A JP58156837 A JP 58156837A JP 15683783 A JP15683783 A JP 15683783A JP S6048688 A JPS6048688 A JP S6048688A
- Authority
- JP
- Japan
- Prior art keywords
- output
- block
- circuit
- color
- resistance
- 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
- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 239000003086 colorant Substances 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract description 10
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 230000010354 integration Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000011664 signaling 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
- H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の第１１用分野 本発明は、カラーテレビジョン受像機に関する。[Detailed description of the invention] 11th industrial field The present invention relates to a color television receiver.
従来例の構成とその問題点
カラーテレビジョン受像機の受像画面上における色飽和
塵レベルを送信画面に対応させて一定に保つ為に、バー
スト信づを検出しこの検出出力によ惠〕搬送色（！９°
のレベルを一定に保つように制御する自動色飽和度調整
（ＡＣＣ）回路が知らね、ている。しか１７この回路は
、送信側の色信号と輝度信号及びバースト信号のう者の
振巾比が良好に管理されている場合にのみ効果があって
、これら３渚のうちのいずれかの管理が悪い場合には、
色飽和度が送信側と異々り、不自然汝映像となる。これ
全改善する為、搬送色信号の平均値全検出してその値が
一定となるようにしたクロマＡＣＣ回路がある。一方、
受像画面上て合胞ｆＬ１度レベルの不自然さを最も敏感
に感じるの（は人物の顔である。上述のクロマＡＣＣ回
路は、搬送色信９−の平均値を一足にするように動作す
るものである為、例えば、人物の顔の背後に彩度の高い
色があると、背後の色＠号の平均値に制徂１さ六ること
によジ、人物の） 顔の飽和度レベルが後端に浅くなり
、却って不自然な映像と々る。Conventional configuration and its problems In order to keep the color saturation dust level on the receiving screen of a color television receiver constant in correspondence with the transmitting screen, burst transmission is detected and the detected output is used to detect the color saturation of the color. (!9°
There is an automatic color saturation adjustment (ACC) circuit that controls the color to maintain a constant level. However, this circuit is effective only if the transmitter's chrominance and luminance signals and the amplitude ratio of the burst signal are well controlled, and if any one of these three channels is controlled. In bad case,
The color saturation is different from that on the transmitting side, resulting in an unnatural image. In order to completely improve this, there is a chroma ACC circuit which detects the entire average value of the carrier color signal and makes the value constant. on the other hand,
On the image receiving screen, the unnaturalness of the syncytial fL1 degree level is most sensitively felt in the face of a person.The above-mentioned chroma ACC circuit operates to equalize the average value of the conveyance color signal 9-. For example, if there is a highly saturated color behind a person's face, the saturation level of the person's face will be limited to the average value of the background color. becomes shallower at the rear end, giving an unnatural image.
発明の目的
本発明は、送信側の色信号、輝ｉ個号及びバースト信り
の管理内容にかかわらず、人物の顔の色飽和度を重点的
に一定にして、映像の不自然さを少なくすることのでき
るカラー受像機を提供することを目的とするものである
。Purpose of the Invention The present invention reduces unnaturalness in images by keeping the color saturation of a person's face constant regardless of the management details of the color signal, brightness number, and burst signal on the transmitting side. The object of the present invention is to provide a color receiver that can perform the following functions.
発明の構成
上述の目的を達成するため本発明は、肌色の構成比率の
大きなＲ−、Ｙ色差信号レベルの平均値を検出する回路
を設け、この平均値によって色副搬入幅回路の増幅度を
制御してＲ−Ｙ色差信号の出力レベルが一定となるよう
にするものである。Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a circuit that detects the average value of the R- and Y color difference signal levels, which have a large composition ratio of skin color, and uses this average value to adjust the amplification degree of the color sub-input width circuit. The output level of the RY color difference signal is controlled to be constant.
実施例の説明
図は本発明の一実施例の回路を示す。図において、ブロ
ックＡはトランジスタＱｌヲ含むＲ−Ｙ色差信邪の増幅
部で、トランジスタＱユのベースにはＲ−Ｙ信号の復調
回路の出力が直流阻止用コンデンサＣよと、復調回路と
の結合を粗にするための抵抗Ｉ（３＊介して加えられ、
又十Ｂ電圧を抵抗Ｒ工で分圧した電圧が抵抗Ｒ２を介し
てバイアス電圧として力υえられる。この分圧抵抗Ｒ，
は適肖なカラーコントロール電圧出力金得るようにバイ
アス電圧を調整するのに用いられる。又抵抗ＲＱはコン
デンサＣ□と抵抗Ｒ３を介してトランジスタＱ□のベー
スに加えられるＲ−Ｙ信号が分圧抵抗Ｒよ全通して漏出
するのと防止する為に挿入さ力、る。トランジスタＱ□
のコレクタには負荷抵抗Ｒ４が接続され、又エミッタに
はエミッタ抵抗攬が接続されている。この抵抗凡はこの
増幅回路の増幅度を決定するものであり、これにバイパ
スコンデンザＣ２が並列に接続されている。このように
してトランジスタＱ、は抵抗Ｒよによって決定されるバ
イアス電圧とコンデンザＣ工と抵抗Ｒ３全経て加えられ
るＲ−Ｙ信号を垢幅して次のブロックＢに信号を供給す
る。The explanatory diagram of the embodiment shows a circuit of one embodiment of the present invention. In the figure, block A is a R-Y color difference amplifier including a transistor Ql, and the output of the R-Y signal demodulation circuit is connected to the DC blocking capacitor C and the demodulation circuit at the base of the transistor Ql. resistor I (3* added through
Further, a voltage obtained by dividing the voltage of 10B by a resistor R is applied as a bias voltage via a resistor R2. This voltage dividing resistor R,
is used to adjust the bias voltage to obtain a suitable color control voltage output. Further, the resistor RQ is inserted to prevent the RY signal applied to the base of the transistor Q□ via the capacitor C□ and the resistor R3 from leaking through the voltage dividing resistor R. Transistor Q□
A load resistor R4 is connected to the collector, and an emitter resistor R4 is connected to the emitter. This resistor determines the amplification degree of this amplifier circuit, and a bypass capacitor C2 is connected in parallel to this resistor. In this way, the transistor Q applies the bias voltage determined by the resistor R, the R-Y signal applied through the capacitor C and the resistor R3, and supplies the signal to the next block B.
ブロックＢは、抵抗Ｒ６とコンデンサＣ，Ｃ４とより構
成された積分回路で、ブロックＡで増幅さねたＲ−Ｙ復
調出力の平均値を作るものである。この平均値のレベル
は分圧抵抗Ｒ０［よって調整することができる。ここに
得られたＲ−Ｙ色差信号、の復調出力の平均値は、次の
ブロックＣに加えられる。Block B is an integrating circuit composed of a resistor R6 and capacitors C and C4, and is used to create an average value of the R-Y demodulated output that has not been amplified in block A. The level of this average value can be adjusted by the voltage dividing resistor R0. The average value of the demodulated output of the RY color difference signal obtained here is added to the next block C.
ブロックＣは、インビーダンヌ変換回路であり、エミッ
タホロワのトランジスタＱ２と抵抗Ｒ７とより構成され
、このエミックホロワトランジスタＱ２のエミッタとア
ーク間に色飽和度調整ボリューム■が接続され、その出
力を色搬送波増幅回路に供給している。Block C is an IMBD conversion circuit, which is composed of an emitter follower transistor Q2 and a resistor R7, and a color saturation adjustment volume ■ is connected between the emitter of this emic follower transistor Q2 and the arc, and its output is amplified into a color carrier wave. supplying the circuit.
色搬送波増幅回路は、ボリュームＶＲの出力が大となる
と、その増幅度が増し、ＶＲの出力が小となると、その
増幅度が低下するように制御され、従ってＲ−Ｙ色差信
号俗調回路の出力の平均レベルが犬キくすると、ボリュ
ームＶＲの出力が小さくなって色副搬送増幅回路の増幅
度が低下し、画面上の色が淡くなる。逆にＲ−Ｙ色差信
号復調回路の出力の平均レベルが小さくなると、ボリュ
ーム■の出力が大きくなって、色副搬送増幅回路の増幅
１Ｂ−が上がって、色が濃くなる。The color carrier amplification circuit is controlled so that when the output of the volume VR becomes large, its amplification degree increases, and when the output of VR becomes small, its amplification degree decreases. When the average level of the output becomes sharp, the output of the volume VR decreases, the amplification degree of the color subcarrier amplifier circuit decreases, and the colors on the screen become lighter. Conversely, when the average level of the output of the R-Y color difference signal demodulation circuit becomes smaller, the output of the volume (2) becomes larger, the amplification 1B- of the color subcarrier amplification circuit increases, and the color becomes darker.
発明の効果
このよう（（本発明は、肌色の構成比率の大きなＲ−Ｙ
色差イａ帰の出力の平均レベルを検出して、この平均レ
ベル信号によって色副搬送波増幅器の増幅角を制御する
ことにより、送信側の電信す″、が４・度信号及びバー
スト信り′の管理内容にかかわらず、肉眼に最も感じ易
い人物の顔の部分の色飽和１」［を一定に保って自然に
近い映像とすることができる。Effects of the Invention As described above, the present invention has the advantage that R-Y
By detecting the average level of the output of the color difference signal and controlling the amplification angle of the chrominance subcarrier amplifier using this average level signal, the transmitting side telegraph signal can be adjusted to the 4-degree signal and the burst signal. Regardless of the management details, it is possible to maintain a constant color saturation of the part of a person's face that is most noticeable to the naked eye, resulting in an image that is close to natural.
１４、図面の簡単な説明 図は本発明の一実施例の回路図である。14. Brief explanation of the drawing The figure is a circuit diagram of an embodiment of the present invention.
Ａ・・・増幅部、 Ｂ・−・積分回路、 Ｃ・−・イン
ピーダンヌ変換回路、 Ｑ工、 Ｑ２＝、 ）ランジス
タ、Ｒよ・−・分圧抵抗、■・−・色飽和度調整ボリュ
ーム、Ｃ工・−・直流阻止コンデンサ、Ｃ２・−・ノく
イノくスコンデンサ、Ｃ，、Ｃ，・・積分コンデンサ。A...Amplification section, B...Integrator circuit, C...Impedanne conversion circuit, Q engineering, Q2=, ) transistor, R...Voltage dividing resistor, ■...Color saturation adjustment volume , C engineering --- DC blocking capacitor, C2 --- Innocent capacitor, C,, C, --- Integrating capacitor.
代理人の氏名 弁理士 吉崎悦治Name of agent: Patent attorney Etsuji Yoshizaki
Claims (1)
に対応する信号金得る回路と、この平均値に対応する信
り全色副搬送波の増幅回路（で加えてＲ−Ｙ色差信づ・
の出力レベルの平均値が一定に橙るように制御する回路
とを具えたテレビジョン受像機。A circuit for obtaining a signal signal corresponding to the average value of the output level of the R-Y color difference signal demodulation circuit of the receiver, and an amplification circuit for the subcarriers of all the colors corresponding to this average value (in addition, a circuit for obtaining a signal value corresponding to the average value of the output level of the R-Y color difference signal demodulation circuit・
and a circuit for controlling the average value of the output level of the television set to be orange at a constant value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58156837A JPS6048688A (en) | 1983-08-26 | 1983-08-26 | Television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58156837A JPS6048688A (en) | 1983-08-26 | 1983-08-26 | Television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6048688A true JPS6048688A (en) | 1985-03-16 |
Family
ID=15636447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58156837A Pending JPS6048688A (en) | 1983-08-26 | 1983-08-26 | Television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6048688A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57163820A (en) * | 1981-04-01 | 1982-10-08 | Kawasaki Heavy Ind Ltd | Flowmeter for low temperature |
-
1983
- 1983-08-26 JP JP58156837A patent/JPS6048688A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57163820A (en) * | 1981-04-01 | 1982-10-08 | Kawasaki Heavy Ind Ltd | Flowmeter for low temperature |
| JPS6228408B2 (en) * | 1981-04-01 | 1987-06-19 | Kawasaki Heavy Ind Ltd |
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