JPS5820507B2 - Color television program - Google Patents
Color television programInfo
- Publication number
- JPS5820507B2 JPS5820507B2 JP50055389A JP5538975A JPS5820507B2 JP S5820507 B2 JPS5820507 B2 JP S5820507B2 JP 50055389 A JP50055389 A JP 50055389A JP 5538975 A JP5538975 A JP 5538975A JP S5820507 B2 JPS5820507 B2 JP S5820507B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- frequency
- signals
- color information
- 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.)
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Description
【発明の詳細な説明】
本発明は、信号伝送系の非直線ひずみによるクロスカラ
ーや色相変化などが生じないようにした高品位カラーテ
レビジョン信号の伝送方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-quality color television signal transmission system that prevents occurrence of cross color or hue change due to nonlinear distortion in a signal transmission system.
従来のカラーテレビジョン信号伝送方式の代表的なもの
としてはNTSC,PALおよびSECAMの各方式が
あるが、いずれも、輝度信号と色情報信号とが周波数領
域を共用した周波数多重信号を構成しており、
(1)輝度信号の垂直空間周波数領域において周波数利
用効率よく色情報信号を多重するようにしたNTSC方
式は、信号伝送系の非直線ひずみの影響を受けやすく、
(2)信号伝送系の非直線ひずみの影響を少なくしたP
AL方式やSECAM方式は、輝度信号の垂直空間周波
数領域の周波数利用効率が悪く、(3)いずれの方式に
おいても、輝度信号と色情報信号との間の干渉が再生画
像にクロスカラーやドツト状の妨害として現われる、
などの欠点があり、更に、NTSC方式においては、2
つの色情報信号により色副搬送波を直角2相平衡変調し
て形成した搬送色信号を輝度信号と1水平走査周波数オ
フセット方式により周波数領域を共用した周波数多重信
号にして主搬送波を変調し、伝送するようにしているの
で、
(4)信号伝送系における搬送色信号の非線形位相ひず
みが再生画像に色相のずれとなって現われ、画質を低下
させ、
(5)信号伝送系の帯域特性の劣化が色情報信号相互間
にクロストークを生じ、特に色情報信号の高域周波数成
分の干渉ひずみが大きい、
など色情報信号自体の伝送にも欠点がある。Typical conventional color television signal transmission systems include NTSC, PAL, and SECAM, all of which constitute a frequency multiplexed signal in which a luminance signal and a color information signal share a frequency domain. (1) The NTSC system, which multiplexes color information signals with frequency utilization efficiency in the vertical spatial frequency domain of luminance signals, is susceptible to nonlinear distortion in the signal transmission system; P that reduces the influence of nonlinear strain
The AL method and SECAM method have poor frequency utilization efficiency in the vertical spatial frequency domain of the luminance signal, and (3) in both methods, interference between the luminance signal and color information signal causes cross-color or dot-like patterns in the reproduced image. There are disadvantages such as 2.
A carrier color signal formed by orthogonal two-phase balanced modulation of a color subcarrier using two color information signals is converted into a frequency multiplexed signal that shares the frequency domain with a luminance signal using one horizontal scanning frequency offset method, and the main carrier is modulated and transmitted. (4) Nonlinear phase distortion of the carrier color signal in the signal transmission system appears as a hue shift in the reproduced image, degrading the image quality, and (5) Deterioration of the band characteristics of the signal transmission system causes color distortion. There are also drawbacks to the transmission of the color information signal itself, such as crosstalk occurring between the information signals, and especially high interference distortion of the high frequency components of the color information signal.
本発明の目的は、上述した種々の欠点を除去し、再生画
像にクロスカラーなどの妨害を生ぜず、信号伝送系の周
波数帯域特性の変動の影響を受けない、高品位のカラー
テレビジョン信号伝送方式を提供することにある。It is an object of the present invention to provide high-quality color television signal transmission that eliminates the various drawbacks mentioned above, does not cause interference such as cross color in reproduced images, and is not affected by fluctuations in the frequency band characteristics of the signal transmission system. The goal is to provide a method.
本発明の他の目的は、垂直空間周波数領域の周波数利用
効率よく輝度信号と搬送色信号とを周波数多重し、更に
、信号伝送系の非直線ひずみの影響を補正して除去する
ようにしたカラーテレビジョン信号伝送方式を提供する
ことにある。Another object of the present invention is to frequency-multiplex a luminance signal and a carrier color signal with efficient frequency utilization in the vertical spatial frequency domain, and further to correct and eliminate the influence of non-linear distortion in a signal transmission system. The purpose of the present invention is to provide a television signal transmission system.
すなわち、本発明カラーテレビジョン信号伝送方式は、
カラーテレビジョン信号を輝度信号と2個の色情報信号
とにより構成して伝送するにあたり、前記輝度信号の周
波数領域の上限に対し、少なくとも、前記2個の色情報
信号の周波数帯域幅のうち狭い方の周波数帯域幅より広
い周波数間隔を保つ周波数を有する色副搬送波を、前記
周波数を水平走査周波数の整数倍に設定したときには広
い方の周波数帯域幅を有する前記色情報信号の極性を走
査線交互に反転させ、前記周波数を水平走■
査問波数のiの奇数倍に設定したときには狭い力の周波
数帯域幅を有する前記色情報信号の極性を走査線交互に
反転させたうえで前記2個の色情報信号により直角2相
平衡変調して搬送色信号を形成することにより、その搬
送色信号のうち、狭い方の周波数帯域幅を有する前記色
情報信号の成分を前記輝度信号の成分の配列の延長上に
互いに離隔して配列するとともに、広い方の周波数帯域
幅を有する前記色情報信号の高域成分および低域成分を
各前記成分の配列の中間にそれぞれ介挿して配列するよ
うにしたことを特徴とするものである。That is, the color television signal transmission system of the present invention is as follows:
When transmitting a color television signal composed of a luminance signal and two color information signals, at least one of the frequency bands of the two color information signals is narrower than the upper limit of the frequency range of the luminance signal. When the frequency is set to an integral multiple of the horizontal scanning frequency, the polarity of the color information signal having the wider frequency bandwidth is alternated between the scanning lines. When the frequency is set to an odd multiple of the interrogation wave number i, the polarity of the color information signal is alternately inverted in the scanning line, and the two colors are By performing quadrature two-phase balanced modulation with the information signal to form a carrier color signal, the component of the color information signal having the narrower frequency bandwidth of the carrier color signal is extended to the arrangement of the components of the luminance signal. The color information signals are arranged at a distance from each other on the top, and high-frequency components and low-frequency components of the color information signal having a wider frequency bandwidth are inserted in the middle of the arrangement of each of the components. This is a characteristic feature.
以下に図面を参照して本発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.
はじめに、従来のNTSC方式によるカラーテレビジョ
ン信号形成および信号処理の回路系統を第1図に示す。First, FIG. 1 shows a circuit system for forming and processing color television signals according to the conventional NTSC system.
第1図においては、カラーカメラからのR,G、B信号
を色信号入力端子1,2゜3にそれぞれ供給し、これら
の信号を信号変換器(マトリクス回路)6に加えて輝度
信号Yと■およびQの2つの色信号に変換し、これらの
マ) IJクス出力信号をそれぞれ遮断周波数4.2
MHz 。In Fig. 1, R, G, and B signals from a color camera are supplied to color signal input terminals 1 and 2°3, respectively, and these signals are added to a signal converter (matrix circuit) 6 to convert them into a luminance signal Y. Convert these color signals into two color signals of
MHz.
1、5 MHz 、 0.5 MHzの低域通過フィル
ターγ、89に加えて占有帯域を整えたのち、2つの色
信号I、Qは、水平走査周波数fhの半奇数倍すなわち
(2n+1 )−!−!l!−ノ周波数fs、例えば4
55×fh 2
T−3,58MH2の色副搬送波を入力端子4から変調
器10に加えてこれを直角2相平衡変調し、被変調出力
の搬送色信号を輝度信号Yに、その高周波領域を共用し
て周波数多重し、NTSC方式カラーテレビジョン信号
を形成する。After adjusting the occupied bands in addition to the low-pass filters γ, 89 of 1, 5 MHz and 0.5 MHz, the two color signals I and Q are half-odd times the horizontal scanning frequency fh, that is, (2n+1)−! -! l! -frequency fs, for example 4
A color subcarrier of 55×fh 2 T-3, 58MH2 is applied from the input terminal 4 to the modulator 10 and subjected to quadrature two-phase balanced modulation, and the carrier color signal of the modulated output is converted to the luminance signal Y, and its high frequency region is They are shared and frequency multiplexed to form an NTSC color television signal.
上述のようにして形成したNTSC力式カラーテレビジ
ョン信号の信号スペクトルの分布は、第2図aに示すと
おりに、搬送色信号のスペクトルが輝度信号Yの最も高
い垂直空間周波数領域に多重されてそのスペクトルの中
間に交互に配列されている。The signal spectrum distribution of the NTSC color television signal formed as described above is as shown in FIG. They are arranged alternately in the middle of the spectrum.
しかして、このような搬送色信号においては、信号伝送
系に非直線ひずみがあると、それが再生画像に色相ひず
みすなわち色ずれとなって現われる。However, in such a carrier color signal, if there is non-linear distortion in the signal transmission system, it will appear as hue distortion, that is, color shift, in the reproduced image.
第3図aに直角2相平衡変調した搬送色信号の一方のベ
クトルをy座標軸にとって示す。FIG. 3a shows one vector of the carrier color signal subjected to quadrature two-phase balance modulation on the y-coordinate axis.
第3図aにおいて、αは色副搬送波に対する搬送色信号
側帯波の任意の時間の位相を示し、上側帯波Uと下側帯
波りとは、y軸に対しともにαの角をなし、それらの合
成ベクトルRはy軸に一致している。In Fig. 3a, α indicates the phase of the carrier color signal sideband with respect to the color subcarrier at any time, and the upper sideband U and lower sideband both form an angle of α with respect to the y-axis, and The resultant vector R coincides with the y-axis.
搬送色信号の他力のベクトルは、y軸について、これと
同様の関係を有している。The vector of the external force of the carrier color signal has a similar relationship with respect to the y-axis.
いま、信号伝送系の位相遅延特性は上下両側帯波につい
て一様であるが、上側帯波Uに対する振幅特性が下側帯
波りに対する振幅特性に比して劣化している場合には、
第3図すに示すように、ベクトルUとLとの大きさが相
違し、その結果として合成ベクトルRはy軸と一致しな
くなり、X軸方向の成分Eを生ずる。Now, the phase delay characteristics of the signal transmission system are uniform for both upper and lower band waves, but if the amplitude characteristics for the upper side band wave U are worse than the amplitude characteristics for the lower side band wave, then
As shown in FIG. 3, the vectors U and L are different in magnitude, and as a result, the resultant vector R does not coincide with the y-axis, producing a component E in the X-axis direction.
また、信号伝送系の位相遅延特性に非直線ひずみがあっ
て、上下両側帯波UおよびLに対するある時間の位相角
が、第3図Cに示すように、それぞれβおよびαと相違
した場合にも、合成ベクトルRはy軸と一致せず、X軸
力向の成分Eを生ずる。In addition, if there is non-linear distortion in the phase delay characteristics of the signal transmission system, and the phase angles of the upper and lower band waves U and L at a certain time differ from β and α, respectively, as shown in Figure 3C, Also, the resultant vector R does not coincide with the y-axis and produces a component E in the X-axis force direction.
したがって、信号伝送系の振幅、位相特性に非直線ひず
みがあれば、X軸方向の色信号がX軸方向の色信号成分
を生じ、同様にして1色信号相互間にクロストークを生
ずる。Therefore, if there is non-linear distortion in the amplitude and phase characteristics of the signal transmission system, the color signal in the X-axis direction will generate a color signal component in the X-axis direction, and similarly crosstalk will occur between the color signals.
PAL方式カラーテレビジョン信号は、上述したような
信号伝送系の非直線ひずみによる色相ひずみを生じない
ようにした信号伝送方式であって、2つの色信号のうち
一方の極性を走査線毎に交互に反転させることにより、
第2図すに示すスペクトル分布図のように、輝度信号Y
の高い周波数領域における輝度信号スペクトルの間に搬
送色信号のスペクトルが2本ずつ、相互間にfh/2.
輝度信号スペクトルとの間にfh/4の間隔を保って配
列されるようにしてカラーテレビジョン信号を構成して
いるが、輝度信号Yの垂直空間周波数領域における搬送
色信号の占有周波数帯域が、第2図aに示すNTSC方
式の場合に比べて、2倍となっており、輝度信号Yと搬
送色信号との間の干渉による再生画像のクロスカラー等
の妨害がそれだけ増大する。The PAL color television signal is a signal transmission method that avoids hue distortion due to non-linear distortion in the signal transmission system as described above, and the polarity of one of the two color signals is alternated for each scanning line. By reversing it to
As shown in the spectral distribution diagram shown in Figure 2, the luminance signal Y
There are two carrier color signal spectra between the luminance signal spectra in the high frequency region of , and the distance between them is fh/2.
The color television signal is configured such that it is arranged with an interval of fh/4 between it and the luminance signal spectrum, but the frequency band occupied by the carrier color signal in the vertical spatial frequency domain of the luminance signal Y is This is twice as large as in the case of the NTSC system shown in FIG. 2a, and interference such as cross color in the reproduced image due to interference between the luminance signal Y and the carrier color signal increases accordingly.
すなわち、第2図a、bに示す両方式ともに、輝度信号
と搬送色信号とが周波数領域を共用しているために、信
号伝送系の非直線ひずみによる相互間の干渉として、再
生画像にドツト状の輝度妨害ヤクロスカラー妨害を生じ
、テレビジョン画像の安定感を著しく損なっている。In other words, in both the systems shown in Figure 2a and b, since the luminance signal and the carrier color signal share the frequency domain, dots appear in the reproduced image as mutual interference due to nonlinear distortion in the signal transmission system. This causes brightness interference and cross-color interference, which significantly impairs the stability of television images.
将来の高品位カラーテレビジョン信号伝送方式としては
、上述したような信号伝送路の非直線ひずみによる再生
画像の不安定要素を除去したものでなければならず、し
かも、伝送周波数帯域の利用効率のよいものでなければ
ならない。Future high-definition color television signal transmission systems must eliminate the instability of reproduced images caused by non-linear distortion in the signal transmission path as described above, and also improve the efficiency of use of the transmission frequency band. It has to be good.
かかる高品位信号の伝送を目的とした本発明カラーテレ
ビジョン信号伝送方式による信号形成回路の構成の一例
を第4図に示す。FIG. 4 shows an example of the configuration of a signal forming circuit according to the color television signal transmission system of the present invention, which is intended to transmit such high-quality signals.
第4図において、色信号入力端子1,2,3からのR,
G、B各色撮像出力信号を信号変換器(マトリクス回路
)6に加えて、輝度信号Yと比較的広帯域の色信号Cw
および比較的狭帯域の色信号CNとに変換する。In FIG. 4, R from color signal input terminals 1, 2, and 3,
The G and B color imaging output signals are added to a signal converter (matrix circuit) 6, and a luminance signal Y and a relatively wide band color signal Cw are added to the signal converter (matrix circuit) 6.
and a relatively narrow band color signal CN.
これら広帯域および狭帯域の色信号Cw、CNとしては
、例えはNTSC方式カラーテレビジョン信号の1倍号
およびQ信号としてもよく、また、本願人の出願に係る
特願昭49−97620号明細書に記載のごとく、色度
差が視覚の色感覚差に対応するように表わした等歩度(
UC8)色度図上において視覚に対する色度空間周波数
帯域の広い色信号と、前記色度図上においてその色信号
と直交する方向の色信号とを選び、搬送色信号に対する
位相誤差が再生画像に及ぼす影響が色によって異ならな
いようにしたものとしてもよい。These wideband and narrowband color signals Cw and CN may be, for example, the 1 times the NTSC color television signal and the Q signal. As described in , the isotemporal rate (
UC8) Select a color signal with a wide chromaticity spatial frequency band for visual perception on the chromaticity diagram and a color signal in a direction orthogonal to the color signal on the chromaticity diagram, and calculate the phase error with respect to the carrier color signal in the reproduced image. It is also possible to make the effect not different depending on the color.
上述の変換出力信号をそれぞれ遮断周波数fB。The cutoff frequency fB is used for each of the above-mentioned converted output signals.
fOW+”ONを有する低域通過フィルターγ、8゜9
に加えて、第5図a、b、cにそれぞれ示すように、視
覚特性に適合した周波数帯域特性を有する輝度信号Y、
広帯域色信号Cw、狭帯域色信号CNを形成する。Low-pass filter γ with fOW+”ON, 8°9
In addition, as shown in FIGS. 5a, b, and c, a luminance signal Y,
A wideband color signal Cw and a narrowband color signal CN are formed.
ここで、fOW>fONであれば、それぞれの大きさは
、上述したごとく、視覚特性に合わせて種々の値に選ぶ
ことができ、第5図b〜eにおいてはfOWをfONよ
り相当大きく選び、色信号の一方を相当広帯域にした例
を示す。Here, if fOW>fON, the respective sizes can be selected to various values according to the visual characteristics as described above, and in FIGS. 5b to 5e, fOW is selected to be considerably larger than fON, An example is shown in which one of the color signals has a considerably wide band.
2つの色信号を上述したように設定した第4図示の回路
例においては、入力端子4に加える色副搬送波の周波数
fSを水平走査周波数fhの整数倍に選んでf8=1□
fhとし、更に、輝度信号Yの周波数帯域の上限fBと
狭帯域色信号cNの周波数帯域の上限fON とに関し
fs−=fB+fON’ (1)に選び、
この色副搬送波をそのまま変調器15に加えて狭帯域色
信号CNにより平衡変調し、遅延回路13を通して百フ
ッアン、すなわち90度だけ位相を遅延させた色副搬送
波を変調器14に加えて、切換スイッチ12により水平
走査線毎に交互に極性を反転させた広帯域色信号Cwに
より平衡変調し、これらの変調器14.15の被変調出
力を加算器M1 により加算して、第5図dに周波数帯
域特性を示すような、PAL方式信号と同様な直角2相
変調の多重変調搬送色信号を形成する。In the circuit example shown in FIG. 4 in which two color signals are set as described above, the frequency fS of the color subcarrier applied to the input terminal 4 is selected to be an integral multiple of the horizontal scanning frequency fh, and f8=1□
Furthermore, the upper limit fB of the frequency band of the luminance signal Y and the upper limit fON of the frequency band of the narrowband color signal cN are selected as fs-=fB+fON' (1),
This color subcarrier is directly applied to the modulator 15, where it is balanced-modulated by the narrowband color signal CN, and the color subcarrier whose phase is delayed by 100 degrees, that is, 90 degrees, is applied to the modulator 14 through the delay circuit 13, and the switching is performed. Switch 12 performs balanced modulation using a broadband color signal Cw whose polarity is alternately inverted for each horizontal scanning line, and the modulated outputs of these modulators 14 and 15 are added by adder M1, and the frequency is shown in Fig. 5d. A multi-modulated carrier color signal of quadrature two-phase modulation similar to a PAL system signal is formed that exhibits band characteristics.
この搬送色信号を加算器M2に加えて輝度信号Yおよび
入力端子5からの同期信号と加算し、その加算出力を遮
断周波数f′Bを搬送色信号における狭帯域上側波帯の
上限に選んだ低域通過フィルター11に加えて周波数帯
域を整え、第5図eに示すような周波数帯域特性を有す
る複合カラーテレビジョン信号を得る。This carrier color signal is added to the adder M2 and added to the luminance signal Y and the synchronization signal from the input terminal 5, and the cutoff frequency f'B of the summed output is selected as the upper limit of the narrow upper sideband in the carrier color signal. In addition to the low-pass filter 11, the frequency band is adjusted to obtain a composite color television signal having frequency band characteristics as shown in FIG. 5e.
第6図に、第5図eに示す複合カラーテレビジョン信号
の周波数帯域特性を更に詳細に表わしたスペクトル分布
を示す。FIG. 6 shows a spectral distribution representing in more detail the frequency band characteristics of the composite color television signal shown in FIG. 5e.
第6図から判るように、実線で示す輝度信号Yのスペク
トル分布に引続いて同じfh間隔をもって破線で示す狭
帯域色信号CNのスペクトルが連なり、これら一連のY
信号およびCN信号のスペクトルの中間にfh/2 イ
ンターリーブして点線で示す広帯域色信号のスペクトル
が配列されている。As can be seen from FIG. 6, the spectrum distribution of the luminance signal Y shown by the solid line is followed by the spectrum of the narrowband color signal CN shown by the broken line with the same fh interval, and these series of Y
The spectrum of the broadband color signal shown by the dotted line is arranged in an fh/2 interleaved manner between the spectrum of the signal and the CN signal.
第6図のスペクトル分布について更に詳述すれは、O−
■間は輝度信号領域、■は色副搬送波周波数、O−0間
が複合カラーテレビジョンの総合周波数帯域である。For further details on the spectral distribution in FIG.
The space between (2) and (2) is the luminance signal region, (2) is the color subcarrier frequency, and between O and 0 is the total frequency band of the composite color television.
しかして、■〜■間においては輝度信号Yと搬送色信号
とが周波数領域を共用しているが、輝度信号の高域スペ
クトル分布の中に色信号成分スペクトルが混在している
のはこの■〜■間のみであり、しかも、この間に分布す
る色信号成分は広帯域色信号の高域におけるエネルギー
の少ないスペクトルが混在しているに過ぎない。However, between ■ and ■, the luminance signal Y and the carrier color signal share the frequency domain, but this is why the color signal component spectrum is mixed in the high-frequency spectral distribution of the luminance signal. The color signal components distributed between .
さらに、輝度信号Yと周波数領域を全く共用していない
■〜0間においては、2つの色信号成分が、互に活ト離
間し、占有スペクトル周波数を異にして並存し、搬送色
信号の垂直空間周波数領域におけるスペクトル分布の占
有帯域が、従来方式の2倍になっており、この周波数領
域を有効に利用して色情報信号を効率よく伝送している
。Furthermore, between ■ and 0, which do not share any frequency domain with the luminance signal Y, the two color signal components are separated from each other and coexist with different occupied spectral frequencies, and the two color signal components are vertical to the carrier color signal. The occupied band of the spectral distribution in the spatial frequency domain is twice that of the conventional system, and this frequency domain is effectively used to efficiently transmit color information signals.
したがって、上述のごときスペクトル分布を有する本発
明方式のカラーテレビジョン信号においでは、信号伝送
系に非直線ひずみがあっても、互に占有スペクトルを異
にするため、色信号相互間の干渉による再生画像の色相
変化は生ぜず、かつ、輝度信号と色信号との間の干渉も
少なくなるので、安定なカラー画像情報信号の伝送を行
なうことができる。Therefore, in the color television signal of the present invention having the above-mentioned spectral distribution, even if there is nonlinear distortion in the signal transmission system, the occupied spectra are different from each other, so reproduction is caused by interference between color signals. Since no change in the hue of the image occurs and interference between the luminance signal and the color signal is reduced, stable transmission of color image information signals can be achieved.
また、上述の例においては、色副搬送波周波数f を水
平走査周波数fhの整数倍に選んでいるので、受信側に
おける搬送色信号の同期検波のための再生色副搬送波の
同期を簡単、確実にとることができる利点もそなえてい
る。Furthermore, in the above example, since the color subcarrier frequency f is selected to be an integral multiple of the horizontal scanning frequency fh, synchronization of the reproduced color subcarrier for synchronous detection of the carrier color signal on the receiving side can be easily and reliably performed. There are also benefits that can be taken.
なお、上述の例においては、第5図d、eに示すように
、広帯域色信号Cwの高域成分が相当の範囲で輝度信号
Yの高域成分と周波数領域を共用するように設定したが
、例えば第5図fに示すように、色副搬送波周波数を少
し高く選び、広帯域色信号Cwの周波数帯域を余り広く
しない、などして、広帯域色信号Cwと輝度信号Yとの
周波数領域の共用分を少なくし、あるいは、はとんどな
くせは、受信側においては、輝度信号Yと搬送色信号と
は1次元フィルターにより、また、広帯域色信号Cwと
狭帯域色信号CNとはくし形フィルクーによって分離す
ることができ、これら信号相互間の干渉や信号伝送路の
特性劣化によるクロストーク等のない安定なカラー画像
信号の伝送が更に容易となる。In the above example, as shown in FIGS. 5d and 5e, the high frequency component of the wideband color signal Cw is set to share the frequency domain with the high frequency component of the luminance signal Y to a considerable extent. , for example, as shown in FIG. 5f, by choosing the color subcarrier frequency a little higher and not making the frequency band of the wideband chrominance signal Cw too wide, the frequency domain can be shared by the wideband chrominance signal Cw and the luminance signal Y. On the receiving side, the luminance signal Y and carrier chrominance signal are filtered by a one-dimensional filter, and the wideband chrominance signal CW and narrowband chrominance signal CN are filtered by a comb-shaped filter. This makes it easier to transmit stable color image signals without interference between these signals or crosstalk due to deterioration of characteristics of the signal transmission path.
更に、第5図fと同様にして、輝度信号Yと搬送色信号
とが周波数領域をほとんど共用しないようにした場合に
おいて、色副搬送波の周波数f。Further, in the same manner as in FIG. 5f, when the luminance signal Y and the carrier color signal hardly share the frequency domain, the frequency f of the color subcarrier.
を水平走査周波数fhとは無関係に任意の周波数に選ん
だときのカラーテレビジョン信号のスペクトル分布を第
7図に示す。FIG. 7 shows the spectral distribution of the color television signal when fh is selected to be an arbitrary frequency regardless of the horizontal scanning frequency fh.
第7図のスペクトル分布においては、広帯域、狭帯域の
両色信号ともに、それらのスペクトルは輝度信号スペク
トルを引続き同じ間隔で連続させて延長した位置には存
在せず、しかも2つの色信号スペクトル相互間にはfh
/2の間隔が保たれているので、Y、Cw。In the spectral distribution shown in Fig. 7, the spectra of both the wideband and narrowband color signals do not exist at positions where the luminance signal spectrum is continuously extended at the same intervals, and furthermore, the two color signal spectra are mutually exclusive. In between is fh
Since the interval of /2 is maintained, Y, Cw.
CN各信号のそれぞれのスペクトル分布は全く重ならず
、また色副搬送波周波数f、は、前述したようにf5〉
fB+fcNの関係にあるので、これら各信号は多重信
号の形成も、また、フィルターによる分離も極めて容易
となり、しかも、相互間の干渉も更に少なくなる。The respective spectral distributions of the CN signals do not overlap at all, and the color subcarrier frequency f, as described above, is f5〉
Since there is a relationship of fB+fcN, it is extremely easy for these signals to form multiplexed signals and to separate them using filters, and furthermore, mutual interference is further reduced.
つぎに、本発明方式によるカラーテレビジョン信号形成
回路の他の構成例を第8図に示す。Next, FIG. 8 shows another example of the configuration of a color television signal forming circuit according to the method of the present invention.
第8図の構成においては、前述の例と同様に、R,G。In the configuration of FIG. 8, R, G as in the previous example.
B各色のカメラ出力信号を信号変換器(マトリクス回路
)6に供給し、その変換出力をそれぞれ遮断周波数fB
、t”awl fONの低域通過フィルターr、8.9
に加えて輝度信号Y、広帯域色信号Cw、狭帯域色信号
cNをそれぞれ形成する。The camera output signals of each color B are supplied to the signal converter (matrix circuit) 6, and the converted outputs are set to the cutoff frequency fB.
, t”awl fON low-pass filter r, 8.9
In addition, a luminance signal Y, a wideband color signal Cw, and a narrowband color signal cN are respectively formed.
入力端子4に供給する色副搬送波の周波数f8は、本例
においては、従来のNTSC方式などにおけると同様に
、水平走査周波数fhの土寄数倍(2n+ 1 )−7
?に選び、その色副搬送波をそのまま変調器15に加え
て、切換スイッチ12により水平走査線毎に交互に極性
を反転させた狭帯域色信号CNにより平衡変調し、また
、遅延回路13によπ −、
り万フジアン、すなわち90度位相を遅延させた色副搬
送波を変調器14に加えて広帯域色信号Cwにより平衡
変調し、これら変調器’14,15の被変調出力を加算
器M0 に加えて直角2相変調の搬送色信号を形成し、
以下は第4図示の構成におけると全く同様に処理して第
5図eと全く同様の周波数帯域分布を有する複合カラー
テレビジョン信号を得ることができる。In this example, the frequency f8 of the color subcarrier supplied to the input terminal 4 is equal to the horizontal scanning frequency fh multiplied by an earth factor (2n+1)-7, as in the conventional NTSC system.
? The color subcarrier is applied as it is to the modulator 15, and balanced modulated by the narrowband color signal CN whose polarity is alternately inverted for each horizontal scanning line by the changeover switch 12. -, the color subcarrier whose phase is delayed by 90 degrees is added to the modulator 14 and balanced modulated by the wideband color signal Cw, and the modulated outputs of these modulators '14 and 15 are added to the adder M0. to form a quadrature two-phase modulated carrier color signal,
The following processing is performed in exactly the same manner as in the configuration shown in FIG. 4 to obtain a composite color television signal having a frequency band distribution exactly the same as that in FIG. 5e.
なお、以上の各側における搬送色信号の周波数帯域特性
は、第5図eおよびfに示すように、複合カラーテレビ
ジョン信号の総合周波数帯域の上限を搬送色信号の狭帯
域上側波帯の上限に選んで占有周波数帯域が広くならな
いようにしているため、広帯域色信号の高域成分に対す
る側波帯は下側のみとなっているので、受信側で再生し
たときに、広帯域色信号Cwの高域成分のレベルは低域
成分に比べて半減することになる。The frequency band characteristics of the carrier chrominance signal on each side above are as shown in Figure 5 e and f, where the upper limit of the total frequency band of the composite color television signal is the upper limit of the narrow upper sideband of the carrier chrominance signal. Since the occupied frequency band is selected to prevent the occupied frequency band from becoming wide, the sideband for the high frequency component of the wideband color signal is only the lower side, so when reproduced on the receiving side, the high frequency band of the wideband color signal Cw is The level of the low frequency components is reduced by half compared to the low frequency components.
第9図aに示す本発明方式によるカラーテレビジョン信
号形成回路の更に他の構成例においては、信号変換器6
の変換出力色信号のうち、狭帯域色信号cNは、前述の
例におけると同様に遮断周波数fONの低域通過フィル
ター9を介して取出すが、広帯域色信号Cwについては
、遮断周波数fOWの低域通過フィルター8と遮断周波
数fONの低域通過フィルター19とに分岐して供給し
、かつ、広帯域フィルター8には、フィルター8と19
とにおける通過信号の遅延の差に相当する遅延量の遅延
回路20を介して信号を供給し、更に、狭帯域フィルタ
ー19の出力信号は減衰器16に加えてその信号レベル
を半減させたうえで、広帯域フィルター8の出力信号と
減算器M3に加えて合成し、その合成出力を増幅器1r
に加えて信号レベルを2倍に増幅し、第9図すに示すよ
うに、高域成分の電圧利得を低域成分の2倍にした広帯
域色信号を形成する。In still another configuration example of the color television signal forming circuit according to the present invention shown in FIG. 9a, the signal converter 6
Among the converted output color signals, the narrowband color signal cN is extracted through the low-pass filter 9 with the cutoff frequency fON as in the previous example, but the wideband color signal Cw is extracted from the lowpass filter 9 with the cutoff frequency fON. It is branched and supplied to a pass filter 8 and a low pass filter 19 with a cutoff frequency fON, and the broadband filter 8 is supplied with filters 8 and 19.
A signal is supplied through a delay circuit 20 with a delay amount corresponding to the difference in delay of the passing signal between , the output signal of the wideband filter 8 is added to the subtracter M3, and the combined output is sent to the amplifier 1r.
In addition, the signal level is amplified twice to form a broadband color signal in which the voltage gain of the high frequency component is twice that of the low frequency component, as shown in FIG.
このようにして、高域成分のレベルをあらかじめ倍増さ
せた広帯域色信号を、例えば第4図示の構成例において
は、更に位相反転回路18に加えてのち用い、狭帯域色
信号CNは、第9図Cに示すように、従来と同様の周波
数帯域特性のままで用い、これらの色信号を輝度信号と
多重して、第5図。In this way, in the configuration example shown in FIG. 4, the broadband color signal whose high frequency component level has been doubled in advance is used after being added to the phase inversion circuit 18, and the narrowband color signal CN is As shown in FIG. C, the same frequency band characteristics as the conventional one are used, and these color signals are multiplexed with the luminance signal.
に対応する第9図dのような周波数帯域特性を有するカ
ラーテレビジョン信号を形成する。A color television signal having frequency band characteristics as shown in FIG. 9(d) corresponding to the above is formed.
かかる周波数帯域特性のカラーテレビジョン信号を受信
側で復調すれば、再生した広帯域色信号Cwの周波数帯
域特性は、送受信端双方の高域成分のレベル差が相殺さ
れて、全く平担となる。If a color television signal with such frequency band characteristics is demodulated on the receiving side, the frequency band characteristics of the reproduced wideband color signal Cw will be completely flat because the level difference in the high frequency components at both the transmitting and receiving ends is canceled out.
第10図に、本発明方式によるカラーテレビジョン信号
に対する受信側における信号分離回路の構成例を示す。FIG. 10 shows a configuration example of a signal separation circuit on the receiving side for a color television signal according to the method of the present invention.
第10図の構成においては、受信復調出力信号を遮断周
波数fB、遅延特性τBの低域通過フィルター21に加
えて輝度信号Yを分離し、一方、遅延回路20に加えて
上述のY信号と遅延時間を備えた復調出力信号から、減
算器M4により輝度信号Yを除去して搬送色信号成分を
取出す。In the configuration shown in FIG. 10, the received demodulated output signal is applied to a low-pass filter 21 having a cutoff frequency fB and a delay characteristic τB to separate the luminance signal Y, and a delay circuit 20 is applied to the above-mentioned Y signal and A subtracter M4 removes the luminance signal Y from the demodulated output signal with time to extract the carrier color signal component.
この再生搬送色信号は、■水平走査期間(IH)遅延回
路22と、その遅延量をτC=±2了Tの範囲で調整す
るようにした遅延量τCの可変遅延回路23に加えた遅
延出力とともに、加算器M1 および減算器M、に、信
号相互間の遅延を合わせで供給し、それぞれの加減算出
力として狭帯域および広帯域の搬送色信号成分CNおよ
びCwを得る。This reproduced carrier color signal is a delayed output added to a horizontal scanning period (IH) delay circuit 22 and a variable delay circuit 23 whose delay amount τC is adjusted within the range of τC = ±2 T. At the same time, the delays between the signals are jointly supplied to the adder M1 and the subtracter M, and narrowband and wideband carrier color signal components CN and Cw are obtained as respective addition/subtraction outputs.
なお、可変遅延回路23の遅延量τCは、第1図に示す
ように、色副搬送波の周波数f5を任意に設定した場合
には上述した範囲で、走査線毎に極性が反転する色信号
の遅延タイミングを合わせるように調整するが、第5図
および第6図に示すように、色副搬送波周波数f5を水
平走査周波数fhの整数倍もしくは土寄数倍に選んだ場
合にはπc−Cとする。Note that, as shown in FIG. 1, the delay amount τC of the variable delay circuit 23 is within the above-mentioned range when the frequency f5 of the color subcarrier is arbitrarily set, and the delay amount τC of the color signal whose polarity is reversed for each scanning line is determined as shown in FIG. Adjustment is made to match the delay timing, but as shown in Figures 5 and 6, if the color subcarrier frequency f5 is selected to be an integral multiple or a multiple of the horizontal scanning frequency fh, πc-C. do.
以上から明らかなように、本発明方式のカラーテレビジ
ョン信号によれば、信号伝送系の特性劣化に関係なく安
定なカラー画像信号の伝送を行なうことができるが、信
号伝送系の周波数帯域特性を(f5+fOw)以下に帯
域制限されると、色信号相互間のクロストークは生じな
いが、広狭両帯域色信号の周波数帯域特性が、例えば第
9図に関連して述べたように、劣化する。As is clear from the above, according to the color television signal of the present invention, a stable color image signal can be transmitted regardless of the characteristic deterioration of the signal transmission system, but the frequency band characteristics of the signal transmission system When the band is limited to (f5+fOw) or less, crosstalk between color signals does not occur, but the frequency band characteristics of both wide and narrow band color signals deteriorate, for example, as described in connection with FIG. 9.
かかる本発明方式カラー画像信号における再生色信号の
周波数帯域特性の劣化を除去するためには、例えば、第
11図に示すように、テレビジョン信号の垂直消去期間
中に、周波数f1.f2.f3゜・・・、fn−1,f
nの正弦波で色副搬送波f8を、搬送色信号と同様に平
衡変調した参照信号を、少なくとも2走査線以上連続し
て同じ位置に挿入して多重し、搬送色信号とともに伝送
する。In order to eliminate the deterioration of the frequency band characteristics of the reproduced color signal in the color image signal of the present invention, for example, as shown in FIG. 11, during the vertical erasing period of the television signal, the frequency f1. f2. f3゜..., fn-1, f
A reference signal in which the color subcarrier f8 is balanced and modulated in the same manner as the carrier color signal using a sine wave of n is continuously inserted and multiplexed at the same position for at least two or more scanning lines, and is transmitted together with the carrier color signal.
この場合の色副搬送波の位相は、狭帯域色信号CNで変
調する色副搬送波の位相としてもよく、また、広帯域色
信号Cwで変調する色副搬送波の位相としてもよい。The phase of the color subcarrier in this case may be the phase of the color subcarrier modulated by the narrowband color signal CN, or may be the phase of the color subcarrier modulated by the wideband color signal Cw.
受信側においては、例えば第12図に示すような回路構
成により、復調器24の出力信号につき、第11図の波
形におけるDC部分の復調出力レベルと各参照周波数成
分の再生レベルとを比較し、各周波数f1.f2.f3
.・・・fn−0,fnの参照信号成分に関する自動利
得制御(AGC)信号をその発生器26において形成し
、それぞれのAGC信号を上記各周波数に対するチャン
ネルイコライザーにそれぞれ供給して、その増幅利得を
各参照信号の再生レベルの偏差を補正するように調整し
、平和な周波数帯域特性の搬送色信号を再生するように
する。On the receiving side, for example, with a circuit configuration as shown in FIG. 12, the demodulated output level of the DC portion of the waveform of FIG. 11 and the reproduction level of each reference frequency component are compared for the output signal of the demodulator 24, Each frequency f1. f2. f3
.. . . . An automatic gain control (AGC) signal regarding the reference signal components of fn-0 and fn is formed in the generator 26, and each AGC signal is supplied to a channel equalizer for each of the above-mentioned frequencies to calculate the amplification gain thereof. Adjustments are made to correct deviations in the reproduction level of each reference signal, and a carrier color signal with peaceful frequency band characteristics is reproduced.
かくすることにより、信号伝送系における位相ひずみや
周波数帯域特性の劣化の影響を受けない安定なカラー画
像信号を再生することができる。By doing so, it is possible to reproduce a stable color image signal that is not affected by phase distortion or deterioration of frequency band characteristics in the signal transmission system.
以上の説明から明らかなように、本発明カラーテレビジ
ョン信号伝送方式においては、
([)少なくともエネルギーの大きい色信号成分は輝度
信号成分と周波数・領域を共用しないようにして、輝度
信号と色信号とを周波数多重し、(ii) 2つの色
信号の成分は互にfh/2の間隔を保ってそれぞれの周
波数スペクトルが重ならないようにして色副搬送波を多
重変調し、
(曲 輝度信号成分と周波数領域を共用しない範囲の搬
送色信号の周波数スペクトルは、上記(11)に述べた
ようにして、従来方式の2倍に増大するようにして周波
数帯域を効率よく使用して伝送し、
GV) 色信号のエネルギーが少なく、かつ、一つの
色情報のみを伝送する周波数領域のみにおいて輝度信号
成分と周波数領域を共用し、
(v)上記(IV)に述べた共用領域においては、輝度
信号の高域成分と搬送色信号の成分とを、fh/2オフ
セットのスペクトル分布の関・係を保って多重伝送し、
さらに、
(V)垂直消去期間等に多数具なる周波数の参照信号を
挿入して同時に伝送することにより、受信側において、
これら参照信号の再生レベルに応じチャンネルイコライ
ザーの再生利得を調整して再生搬送色信号の周波数帯域
特性を補正する、ようにしているため、本発明伝送方式
によれば、つぎのような顕著な効果が得られる。As is clear from the above explanation, in the color television signal transmission system of the present invention, ([) at least the color signal component with large energy is prevented from sharing the frequency/domain with the luminance signal component, and the luminance signal and the color signal are (ii) The two color signal components are kept at an interval of fh/2 so that their frequency spectra do not overlap, and the color subcarriers are multiplexed. As described in (11) above, the frequency spectrum of the carrier color signal in the range where the frequency domain is not shared is increased to twice that of the conventional method, and the frequency band is efficiently used for transmission. The frequency domain is shared with the luminance signal component only in the frequency domain where the energy of the color signal is low and only one color information is transmitted; (v) In the shared domain described in (IV) above, The spectral components and carrier color signal components are multiplexed and transmitted while maintaining the spectral distribution relationship of fh/2 offset,
Furthermore, (V) By inserting reference signals of multiple frequencies into the vertical erasure period etc. and transmitting them simultaneously, on the receiving side,
Since the reproduction gain of the channel equalizer is adjusted according to the reproduction level of these reference signals to correct the frequency band characteristics of the reproduced carrier color signal, the transmission method of the present invention has the following remarkable effects. is obtained.
(1)輝度信号と色情報信号との相互干渉によるドツト
妨害やクロスカラー妨害が生ぜず、これらの妨害により
再生カラー画像にクローリング現象をおこして不安定感
を伴なうことがない。(1) Dot interference and cross color interference due to mutual interference between the luminance signal and the color information signal do not occur, and these interferences do not cause a crawling phenomenon in the reproduced color image and cause a sense of instability.
(2)信号伝送路における搬送色信号の上下両側帯波に
対する非対称ひずみによっても、色信号相互間のクロス
トークを生ずることがなく、したがって、再生カラー画
像に色相変化を生ずることがない。(2) Crosstalk between color signals does not occur even due to asymmetric distortion of the upper and lower band waves of the carrier color signal in the signal transmission path, and therefore no hue change occurs in the reproduced color image.
(3)色副搬送波の周波数を水平走査周波数の整数倍や
任意の周波数に選んでも、カラー画像伝送の動作や機能
に支障を生ぜず、周波数選定の自由度が増大する。(3) Even if the frequency of the color subcarrier is selected to be an integral multiple of the horizontal scanning frequency or an arbitrary frequency, there is no problem with the operation or function of color image transmission, and the degree of freedom in frequency selection is increased.
(4)色信号の低域成分は、伝送周波数帯域内でスペク
トル分布の占有帯域を広くするようにしているため、搬
送色信号に信号伝送路の非直線ひずみの影響が及ばず、
安定なカラー画像信号の伝送を行なうことができ、高品
位のカラー画像を再生することができる。(4) Since the low frequency component of the color signal has a wide occupied band of spectral distribution within the transmission frequency band, the carrier color signal is not affected by non-linear distortion of the signal transmission path.
Stable color image signal transmission can be performed, and high-quality color images can be reproduced.
第1図は従来のNTSC方式カラーテレビジョン信号形
成回路の構成を示すフ七ツク線図、第2図aおよびbは
それぞれNTSC方式およびPAL方式カラーテレビジ
ョン信号のスペクトル分布を示すスペクトル線図、第3
図a ” cは伝送ひずみによる搬送色信号相互間の混
信を示すベクトル線図、第4図シま本発明方式によるカ
ラーテレビジョン信号形成回路の構成例を示すブロック
線図、第5図a=fは本発明方式によるカラーテレビジ
ョン信号における各成分信号の周波数帯域の分布をそれ
ぞれ示す周波数帯域特性図、第6図は第4図示の回路構
成により形成した第5図eに周波数帯域の分布を示すカ
ラーテレビジョン信号のスペクトル分布の例を示すスペ
クトル線図、第7図は第4図示の回路構成により形成し
たカラーテレビジョン信号のスペクトル分布の他の例を
示すスペクトル線図、第8図は本発明方式によるカラー
テレビジョン信号形成回路の他の構成例を示すブロック
線図、第9図aおよびb−dは本発明方式によるカラー
テレビジョン信号形成回路の更に他の構成例、および、
その回路構成により形成したカラーテレビジョン信号の
周波数帯域分布を示す周波数帯域特性図、第10図は本
発明方式により形成したカラーテレビジョン信号を受信
して各成分信号を分離する回路の構成例を示すブロック
線図、第11図は本発明方式によるカラーテレビジョン
信号の受信復調のために当該信号に付加する参照信号の
例を示す信号波形図、第12図は第11図示の参照信号
を用いて本発明方式のカラーテレビジョン信号を復調す
る回路の構成例を示すブロック線図である。
1.2.3・・・・・・色信号入力端子、4・・・・・
・色副搬送波入力端子、5・・・・・・同期信号入力端
子、6・・・・・・信号変換器(マトリクス回路)、γ
、8,9゜11・・・・・・フィルター、10,14,
15・・・・・・変調器、12・・・・・・切換スイッ
チ、13・・・・・・遅延回路、16・・・・・・減衰
器、1γ・・・・・・増幅器、18・・・・・・極性反
転回路、19・・・・・・フィルター、20.22・・
・・・・遅延回路、21・・・・・・フィルター、23
・・・・・・可変遅延回路、24・・・・・・復調器、
25・・・・・・チャンネルイコライザー、26・・・
・・・AGC信号発生器、M、Ml。
M2・・・・・・加算器、M3.M、、M5・・・・・
・減算器。FIG. 1 is a circuit diagram showing the configuration of a conventional NTSC color television signal forming circuit, and FIGS. 2a and 2b are spectral diagrams showing the spectral distributions of NTSC and PAL color television signals, respectively. Third
Figures a and c are vector diagrams showing interference between carrier color signals due to transmission distortion, Figure 4 is a block diagram showing an example of the configuration of a color television signal forming circuit according to the method of the present invention, and Figure 5 is a = f is a frequency band characteristic diagram showing the distribution of frequency bands of each component signal in the color television signal according to the method of the present invention, and FIG. 6 is a frequency band characteristic diagram formed by the circuit configuration shown in FIG. FIG. 7 is a spectral diagram showing another example of the spectral distribution of the color television signal formed by the circuit configuration shown in FIG. 4, and FIG. A block diagram showing another example of the configuration of the color television signal forming circuit according to the method of the present invention, FIGS.
A frequency band characteristic diagram showing the frequency band distribution of a color television signal formed by the circuit configuration. FIG. 10 shows an example of the configuration of a circuit that receives a color television signal formed by the method of the present invention and separates each component signal. FIG. 11 is a signal waveform diagram showing an example of a reference signal added to a color television signal for reception and demodulation of a color television signal according to the method of the present invention, and FIG. FIG. 2 is a block diagram showing an example of the configuration of a circuit that demodulates a color television signal according to the present invention. 1.2.3... Color signal input terminal, 4...
・Color subcarrier input terminal, 5... Synchronization signal input terminal, 6... Signal converter (matrix circuit), γ
, 8, 9° 11... Filter, 10, 14,
15... Modulator, 12... Changeover switch, 13... Delay circuit, 16... Attenuator, 1γ... Amplifier, 18 ...Polarity inversion circuit, 19...Filter, 20.22...
...Delay circuit, 21...Filter, 23
......variable delay circuit, 24...demodulator,
25...Channel equalizer, 26...
...AGC signal generator, M, Ml. M2... Adder, M3. M,, M5...
・Subtractor.
Claims (1)
信号とにより構成して伝送するにあたり、前記輝度信号
の周波数領域の上限に対し、少なくとも、前記2個の色
情報信号の周波数帯域幅のうち狭い方の周波数帯域幅よ
り広い周波数間隔を保つ周波数を有する色副搬送波を、
前記周波数を水平走査周波数の整数倍に設定したときに
は広い方の周波数帯域幅を有する前記色情報信号の極性
を走査線交互に反転させ、前記周波数を水平走査円波数
のlの奇数倍に設定したときには狭い方の周波数帯域幅
を有する前記色情報信号の極性を走査線交互に反転させ
たうえで、色情報信号の極性を走査線交互に反転させた
前記2個の色情報信号により直角2相平衡変調して搬送
色信号を形成することにより、その搬送色信号のうち、
狭い方の周波数帯域幅を有する前記色情報信号の成分を
前記輝度信号の成分の配列の延長上に互いに離隔して配
列するとともに、広い方の周波数帯域幅を有する前記色
情報信号の高域成分および低域成分を各前記成分の配列
の中間にそれぞれ介挿して配列するようにしたことを特
徴とするカラーテレビジョン信号伝送方式。1. When transmitting a color television signal composed of a luminance signal and two color information signals, at least the upper limit of the frequency range of the luminance signal is within the frequency bandwidth of the two color information signals. Color subcarriers with frequencies that maintain a wider frequency spacing than the narrower frequency bandwidth,
When the frequency is set to an integer multiple of the horizontal scanning frequency, the polarity of the color information signal having the wider frequency bandwidth is alternately inverted for each scanning line, and the frequency is set to an odd multiple of l of the horizontal scanning circular wave number. Sometimes, the polarity of the color information signal having the narrower frequency bandwidth is alternately inverted in the scanning lines, and then the polarity of the color information signal is alternately inverted in the scanning lines. By performing balanced modulation to form a carrier color signal, among the carrier color signals,
Components of the color information signal having a narrower frequency bandwidth are arranged spaced apart from each other on an extension of the arrangement of the components of the luminance signal, and high frequency components of the color information signal having a wider frequency bandwidth. A color television signal transmission system characterized in that a low frequency component and a low frequency component are inserted and arranged in the middle of the arrangement of each of the components.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50055389A JPS5820507B2 (en) | 1975-05-13 | 1975-05-13 | Color television program |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50055389A JPS5820507B2 (en) | 1975-05-13 | 1975-05-13 | Color television program |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS51132025A JPS51132025A (en) | 1976-11-16 |
JPS5820507B2 true JPS5820507B2 (en) | 1983-04-23 |
Family
ID=12997143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50055389A Expired JPS5820507B2 (en) | 1975-05-13 | 1975-05-13 | Color television program |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5820507B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2908273C2 (en) * | 1979-03-02 | 1982-05-19 | Robert Bosch Gmbh, 7000 Stuttgart | System for the transmission of color television signals |
-
1975
- 1975-05-13 JP JP50055389A patent/JPS5820507B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS51132025A (en) | 1976-11-16 |
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