JPH0748877B2 - Component video signal transmission system - Google Patents
Component video signal transmission systemInfo
- Publication number
- JPH0748877B2 JPH0748877B2 JP61282137A JP28213786A JPH0748877B2 JP H0748877 B2 JPH0748877 B2 JP H0748877B2 JP 61282137 A JP61282137 A JP 61282137A JP 28213786 A JP28213786 A JP 28213786A JP H0748877 B2 JPH0748877 B2 JP H0748877B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- correction
- color
- transmission system
- 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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- Color Television Systems (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はカラーテレビジョン信号のコンポーネント伝送
方式に係り、特にMUSE信号の伝送方式（ハイビジョン用
時間軸圧縮多重サブサンプル伝送方式）に適した方式に
関するものである。Description: TECHNICAL FIELD The present invention relates to a component transmission system of a color television signal, and particularly to a system suitable for a MUSE signal transmission system (time-axis compression multiple subsample transmission system for high-definition). It is about.
（従来の技術） 伝送路のノイズの影響を軽減するため伝送信号に非線形
処理を施すことは従来より知られている。テレビジョン
信号においては受信側の画像表示用陰極線管（CRT）の
非線形を補償するガンマ補正を、一般に使用する受信機
の低廉化のため送信側で行なっており、これが伝送路の
ノイズの影響の軽減化に役立っている。しかし同時に色
信号に乗ったノイズが輝度信号に振りかわりノイズが目
立つことになる。(Prior Art) It has been conventionally known to perform non-linear processing on a transmission signal in order to reduce the influence of noise on the transmission line. For television signals, gamma correction that compensates for the non-linearity of the image display cathode ray tube (CRT) on the receiving side is performed on the transmitting side to reduce the cost of commonly used receivers. It is useful for mitigation. However, at the same time, the noise carried on the color signal is transferred to the luminance signal and the noise becomes noticeable.
（発明が解決しようとする問題点） カラーテレビジョン信号を伝送するに際し、信号源から
得られる三原色カラー画像信号R,G,Bをそのままの形態
にては伝送せず、マトリックス処理して輝度信号Ｙと色
信号Ｃとに変換して伝送するとことが通常行なわれてい
る。この時輝度信号Ｙは被写体の輝度に関する情報のみ
を伝送し、色信号Ｃは被写体の色に関する情報のみを伝
送することを目的としているものであるから、本来色信
号Ｃが変化しても輝度信号Ｙの信号レベルが一定であれ
ば、画像表示装置に表示された画像の輝度は変化せず一
定である筈であり、これを定輝度原理と称しており、こ
の原理を満足する伝送を定輝度伝送と呼んでいる。(Problems to be Solved by the Invention) When transmitting a color television signal, the three primary color image signals R, G, B obtained from the signal source are not transmitted as they are, but are subjected to matrix processing to obtain a luminance signal. It is customary to convert Y and color signals C for transmission. At this time, the luminance signal Y is intended to transmit only the information regarding the luminance of the subject, and the color signal C is intended to transmit only the information regarding the color of the subject. Therefore, even if the color signal C originally changes, the luminance signal Y changes. If the signal level of Y is constant, the brightness of the image displayed on the image display device should be constant without change. This is called the constant brightness principle, and transmission that satisfies this principle is called constant brightness. We call it transmission.
しかしながら実際には受信側におけるCRTの非線形を補
償するためのガンマ補正を、送信側で行なった後前記マ
トリックス処理して送信しており、そのための前述の定
輝度伝送が成立しておらず、輝度信号Ｙの一部が色信号
Ｃの一部に変換されて伝送されている。したがって色信
号Ｃの伝送帯域が制限されてその高域成分が減衰する
と、色信号Ｃに変換された一部の輝度信号も減衰を受け
て、再生輝度信号Ｙの信号レベルの再現性が劣化した
り、狭帯域伝送により色信号Ｃに乗ったノイズが輝度信
号Ｙに振りかわりノイズが目立つ欠点が生じる。この定
輝度原理の不成立は、ガンマ補正しない三原色信号を輝
度信号Ｙと色信号Ｃに変換し、YC分離後色信号の伝送帯
域を狭帯域化することのみでも生じるが、前述のガンマ
補正後のマトリックス処理の方が輝度信号の劣化は著し
い。However, actually, the gamma correction for compensating the non-linearity of the CRT on the receiving side is performed on the transmitting side, and then the matrix processing is performed, and the constant luminance transmission for that purpose is not established. A part of the signal Y is converted into a part of the color signal C and transmitted. Therefore, when the transmission band of the chrominance signal C is limited and its high frequency component is attenuated, a part of the luminance signal converted into the chrominance signal C is also attenuated, and the reproducibility of the signal level of the reproduction luminance signal Y is deteriorated. Alternatively, due to the narrow band transmission, the noise on the color signal C is transferred to the luminance signal Y, resulting in a conspicuous noise. The failure of the constant luminance principle occurs only by converting the three primary color signals that are not gamma-corrected into the luminance signal Y and the color signal C and narrowing the transmission band of the color signal after YC separation. The deterioration of the luminance signal is more remarkable in the matrix processing.
これをさけるため従来の定輝度伝送方式は、送信側での
ガンマ補正をさけたり、本願人になる特開昭60−109989
号“カラー画像表示方式”明細書記載のごとく、広帯域
の高品位カラーテレビジョン画像信号を不十分な伝送帯
域幅にて伝送したとき、受信側装置における輝度レベル
再現性の低下を別途補償して高品位の再生画質を確保し
ている。しかしこれとても伝送系の色信号にのったノイ
ズの輝度信号への振りかわりの劣化を考慮しておらず不
十分である。In order to avoid this, the conventional constant-brightness transmission method avoids gamma correction on the transmission side, and becomes the applicant of the present invention.
As described in No. "Color image display system" specification, when a wide band high-definition color television image signal is transmitted with an insufficient transmission bandwidth, the deterioration of the luminance level reproducibility in the receiving side device is compensated separately. High quality playback image quality is ensured. However, this is not sufficient because the deterioration of the transfer of noise on the color signal of the transmission system to the luminance signal is not taken into consideration.
従って本発明伝送方式の目的は、上述の諸欠点を改善
し、前述の定輝度伝送方式の利点を残しつつ伝送路での
ノイズの影響を排除したコンポーネント映像信号伝送方
式を提供せんとするものである。Therefore, an object of the transmission system of the present invention is to provide a component video signal transmission system that improves the above-mentioned various drawbacks and eliminates the influence of noise on the transmission line while maintaining the advantages of the constant luminance transmission system. is there.
（問題点を解決するための手段） この目的を達成するため、本発明伝送方式は、コンポー
ネント映像信号を伝送するにあたり、伝送系を構成する
送信側にあっては、マトリックス回路により三原色信号
を輝度信号と２つの色差信号に変換した後、これら各信
号をエンコーダ回路に入力せしめてエンコーダ処理して
コンポーネント映像信号として送信し、前記伝送系を構
成する受信側にあっては、送信されてきた前記コンポー
ネント映像信号をデコーダ回路に入力せしめてデコーダ
処理した後、得られた輝度信号と２つの色差信号を逆マ
トリックス回路によりもとの三原色信号に復元するとと
もに、少なくとも輝度信号に関しては、送信側の前記エ
ンコーダ回路の出力と受信側の前記デコーダ回路の入力
との間で伝送信号が非線形補正および非線形逆補正さ
れ、送信側および受信側において定輝度原理が成立する
ようにしたことを特徴とする。(Means for Solving the Problems) In order to achieve this object, in the transmission method of the present invention, when transmitting a component video signal, a matrix circuit forms a luminance signal for the three primary color signals on the transmission side constituting a transmission system. After the signals and the two color difference signals are converted, these signals are input to an encoder circuit, subjected to encoder processing, and transmitted as a component video signal. On the receiving side that constitutes the transmission system, the received signals are transmitted. After the component video signal is input to the decoder circuit and subjected to the decoder processing, the obtained luminance signal and two color difference signals are restored to the original three primary color signals by the inverse matrix circuit, and at least the luminance signal is transmitted to the transmitter side. Between the output of the encoder circuit and the input of the decoder circuit on the receiving side, the transmission signal has non-linear correction and non-linearity. It is characterized in that linear inverse correction is performed so that the constant brightness principle is established on the transmitting side and the receiving side.
さらに本発明の好適な実施態様は、２つの前記色差信号
に関して、送信側の前記マトリックス回路の出力と受信
側の前記逆マトリックス回路の入力との間で伝送信号が
非線形補正および非線形逆補正されることを特徴とす
る。Further, according to a preferred embodiment of the present invention, for the two color difference signals, the transmission signal is nonlinearly corrected and nonlinearly corrected between the output of the matrix circuit on the transmission side and the input of the inverse matrix circuit on the reception side. It is characterized by
（実施例） 以下添付図面を参照し実施例により本発明を詳細に説明
する。(Example) The present invention will be described in detail below with reference to the accompanying drawings.
本発明伝送方式を高品位テレビジョン信号伝送方式に関
わるMUSE（Multiple Sub−Nyquist Sampling Encodin
g）伝送方式に適用した実施例の系統略ブロック線図を
第１図に示す。The transmission method of the present invention is applied to a MUSE (Multiple Sub-Nyquist Sampling Encodin) related to a high-definition television signal transmission method.
g) FIG. 1 shows a schematic block diagram of an embodiment applied to the transmission system.
MUSE伝送方式とは広帯域の高品位テレビジョン信号を有
効に帯域圧縮して伝送する方式の１つで、フレーム間と
フィールド間のオフセットサブサンプリングを用いた多
重サブサンプル伝送方式であるが、詳細については例え
ば本願人になる特願昭60−125049号“時間軸圧縮多重サ
ブサンプル伝送方式”、特願昭60−106132号“多重サブ
サンプル伝送方式”などを参照されたい。The MUSE transmission method is one of the methods for effectively compressing and transmitting wideband high-definition television signals. It is a multiple sub-sample transmission method using offset sub-sampling between frames and fields. See, for example, Japanese Patent Application No. 60-125049 “Time axis compression multiple sub-sample transmission system” and Japanese Patent Application No. 60-106132 “Multi-subsample transmission system”, which are the applicants of the present invention.
第１図示のガンマ逆補正回路（γ-1）１は、通常のカラ
ーテレビジョン信号の伝送では送信側で受信側における
CRTの非線形を補償するためγ補正しており、これをも
との線形R,G,B入力信号にもどし前述の定輝度伝送を達
成するためのもので、気体放電型表示パネルのように表
示装置の入力信号と表示装置の発光輝度とが線形関係に
ある系の入力信号ではこの必要はない。The gamma inverse correction circuit (γ -1 ) 1 shown in the first figure is provided on the transmission side and the reception side in the transmission of a normal color television signal.
Gamma correction is performed to compensate for the non-linearity of the CRT, and this is used to return the original linear R, G, B input signals to achieve the above-mentioned constant luminance transmission, and display like a gas discharge type display panel. This is not necessary for an input signal of a system in which the input signal of the device and the emission brightness of the display device have a linear relationship.
本発明伝送方式の骨子とする所は、その特許請求の範囲
に記載のごとく、例えば第１図示の系統を有する伝送系
において、送信側、受信側の各信号処理回路、すなわち
マトリックス処理回路MTX2、輝度信号用帯域制限フィル
タLPF（Ｙ）３、広帯域色信号用帯域制限フィルタLPF
（C1）４および狭帯域色信号用帯域制限フィルタLPF（C
2）５からなる信号処理回路、MUSEエンコーダ７の信号
処理回路、MUSEデコーダ10の信号処理回路、輝度信号用
帯域制限フィルタLPF（Ｙ）12、広帯域色信号用帯域制
限フィルタLPF（C1）13、狭帯域色信号用帯域制限フィ
ルタLPF（C2）14および逆マトリックス処理回路MTX-115
からなる信号処理回路などのそれぞれの入力側におい
て、それら各信号処理回路に入力される信号を、少なく
とも輝度信号に関して受信側で表示される表示画像の階
調とレベル的に直線関係にある信号とすることである。
すなわち前記直線関係にある輝度信号が前記各信号処理
回路の入力側に常に存在するようにこの伝送系を組めば
よいということである。As the essence of the transmission system of the present invention, as described in the claims, for example, in the transmission system having the system shown in the first diagram, each signal processing circuit on the transmission side and the reception side, that is, the matrix processing circuit MTX2, Luminance signal band limiting filter LPF (Y) 3, Wide band color signal band limiting filter LPF
(C 1 ) 4 and band limiting filter LPF (C
2 ) 5 signal processing circuit, MUSE encoder 7 signal processing circuit, MUSE decoder 10 signal processing circuit, luminance signal band limiting filter LPF (Y) 12, wide band color signal band limiting filter LPF (C 1 ) 13 , Narrow band color signal band limiting filter LPF (C 2 ) 14 and inverse matrix processing circuit MTX -1 15
In each input side of the signal processing circuit, etc., the signal input to each of the signal processing circuits is a signal that is linearly related in level to the gradation of the display image displayed on the receiving side with respect to at least the luminance signal. It is to be.
That is, this transmission system should be assembled so that the luminance signals in the linear relationship always exist on the input side of each of the signal processing circuits.
ということはすくなくとも輝度信号に関する非線形補正
とその非線形逆補正とが前記各信号処理回路間でクロー
ズしておればよいということである。第１図で伝送路の
ノイズの影響を軽減するため送信側に設けた輝度信号の
みの非線形補正回路ΓY8とその補正をもとにもどす受信
側に設けた輝度信号のみの非線形逆補正回路ΓY -19とは
正にそれで、MUSEエンコーダ７の信号処理回路とMUSデ
コーダ10の信号処理回路間でクローズしている。かくて
得られた逆マトリックス処理回路MTX-115後の復元三原
色信号は、もし受信側の画像表示装置がCRTのように発
光輝度と入力信号の関係が非線形を有するものでは、そ
こではじめてその非線形を補償する通常のガンマ補正γ
16を実施すればよく、気体放電表示パネルのように線形
特性を有するものではガンマ補正する必要はない。This means that at least the non-linear correction of the luminance signal and the non-linear inverse correction thereof should be closed between the signal processing circuits. In FIG. 1, a non-linear correction circuit Γ Y 8 for the luminance signal only provided on the transmission side to reduce the influence of noise on the transmission line and a non-linear inverse correction circuit for the luminance signal only provided on the reception side that restores the correction. Γ Y -19 is exactly that, and it is closed between the signal processing circuit of the MUSE encoder 7 and the signal processing circuit of the MUS decoder 10. The restored three-primary-color signal after the inverse matrix processing circuit MTX -1 15 obtained in this way is the first non-linear one if the image display device on the receiving side has a non-linear relationship between the emission luminance and the input signal like a CRT. Normal gamma correction γ to compensate for
It suffices to implement step 16, and it is not necessary to perform gamma correction in a gas discharge display panel having a linear characteristic.
第１図示の例では色信号Ｃに関しては非線形補正が少な
くてすむので、MUSEエンコーダ７の信号処理回路の前で
伝送路のノイズの影響を軽減するための非線形補正回路
ΓC6を挿入している。これは信号処理回路の信号処理の
精度が十分に高ければ、輝度信号Ｙと同様にMUSEエンコ
ーダ７の信号処理回路の後で非線形補正した方がよい。In the example shown in the first illustration, since the nonlinear correction for the color signal C can be small, a nonlinear correction circuit Γ C 6 for reducing the influence of noise on the transmission line is inserted in front of the signal processing circuit of the MUSE encoder 7. There is. If the accuracy of the signal processing of the signal processing circuit is sufficiently high, it is better to perform non-linear correction after the signal processing circuit of the MUSE encoder 7 as with the luminance signal Y.
この伝送路用の非線形補正の特性は輝度信号Ｙと色信号
Ｃとで著しく異なっており、輝度信号Ｙの補正は従来の
カメラ側のガンマ補正（第２図（ａ）参照）と特性が非
常に近い形ΓＹであるが、色信号Ｃの補正は第２図
（ｂ）に示すように極く彩度の低い部分の傾斜がたって
いるほぼ直線に近い形ΓＣがよい。The characteristic of the non-linear correction for the transmission line is significantly different between the luminance signal Y and the color signal C, and the characteristic of the luminance signal Y is very similar to the conventional gamma correction on the camera side (see FIG. 2A). it is a form close gamma Y, the color signal C correction good shape gamma C close substantially straight line that passed since the inclination of the lower part of the very saturation as shown in FIG. 2 (b).
このようにする理由は、第１図示のように受信側の画像
表示装置にCRTを用いる場合、その非線形性をガンマ補
正回路γ16で完全に補償し得ることはあり得ないので、
どうしても色信号Ｃより輝度信号Ｙへのクロストークが
CRT上で発生する。これは色信号の彩度の高い部分ほど
著しいので彩度の高い部分の色信号ＣのS/Nは良くして
おくのが望ましい。従って色信号の非線形補正回路ΓC6
の特性は、第２図（ｂ）に示すように輝度信号Ｙに対す
る伝送用の非線形補正回路ΓY8の特性第２図（ａ）図示
と違ってレベルの高い部分を次第に低い傾斜としない方
がよい。The reason for doing so is that when a CRT is used in the image display device on the receiving side as shown in the first diagram, the non-linearity cannot be completely compensated by the gamma correction circuit γ16.
Inevitably crosstalk from the color signal C to the luminance signal Y
It occurs on the CRT. Since this is remarkable in a portion where the saturation of the color signal is high, it is desirable to improve the S / N of the color signal C in the portion where the saturation is high. Therefore, the color signal nonlinear correction circuit Γ C 6
As shown in FIG. 2 (b), the characteristic of the non-linear correction circuit Γ Y 8 for transmission with respect to the luminance signal Y is different from that shown in FIG. 2 (a). Is good.
なお第１図示のMUSEエンコーダ、デコーダはディジタル
方式で構成するのが普通であるから、実際の回路ではそ
れぞれの入力側、出力側にA/D,D/A変換器が挿入され
る。Since the MUSE encoder and decoder shown in FIG. 1 are usually constructed by a digital system, A / D and D / A converters are inserted on each input side and output side in an actual circuit.
また、第１図示のような構成をとると、MUSEエンコー
ダ、デコーダの信号処理は、輝度信号Ｙに関してはすべ
て線形レベル空間内での処理となり、これは次の点で極
めて重要なことである。すなわちMUSE方式では画像の内
容に応じて例えば静止画か動画かに応じて少なくとも２
種類の空間フィルタを用い切替えて使用する。この場合
電気信号のレベルと表示装置上の表示レベルが線形関係
にないと、空間フィルタの通過帯域幅の狭い方が電気信
号の平均レベルは同等であってもピークレベルが低下す
る（高域カットのため）ので、２種類のフィルタを通過
してきた信号の表示上の平均レベルが変動してしまう。
実際にはCRTの表示特性は２乗以上の曲線であるから、
動画で画像のぼけた部分は暗くなり、これが動画／静止
画の切替わり時に画像を不安定にする原因となる。Further, with the configuration shown in FIG. 1, the signal processing of the MUSE encoder and decoder is all processing in the linear level space for the luminance signal Y, which is extremely important in the following point. That is, in the MUSE method, depending on the image content, for example, at least 2 depending on whether it is a still image or a moving image.
Switch by using different types of spatial filters. In this case, if the level of the electric signal and the display level on the display device are not in a linear relationship, the narrower pass band width of the spatial filter lowers the peak level even if the average level of the electric signal is the same (high frequency cutoff). Therefore, the average level on the display of the signals that have passed through the two types of filters fluctuates.
Actually, the display characteristic of CRT is a curve of square or more,
The blurred portion of the image in the moving image becomes dark, which causes the image to become unstable when switching between the moving image and the still image.
以上本発明方式を高品位テレビジョン信号伝送方式に関
わるMUSE伝送方式に適用した実施例につき説明してきた
が、本発明伝送方式はこれに限定されるものでなく、前
述のごとくすくなくとも輝度信号が、各信号処理回路の
入力端で表示画像の階調とレベル的に直線関係にある系
が成立する可能性のある伝送系にすべて適用できること
を付記しておく。Although the embodiment of the present invention system applied to the MUSE transmission system related to the high-definition television signal transmission system has been described above, the transmission system of the present invention is not limited to this, and the luminance signal is at least as described above, It should be noted that the present invention can be applied to all transmission systems in which a system having a linear relationship with the gradation of a display image at the input end of each signal processing circuit may be established.
（発明の効果） 本発明伝送方式を採用することにより、カラーテレビジ
ョン信号の伝送において色信号Ｃから輝度信号Ｙへのク
ロストークが削減され、かつ伝送路ノイズの視覚的な目
立ち易さと整合した伝送方式を作ることができる。(Advantages of the Invention) By adopting the transmission method of the present invention, crosstalk from the color signal C to the luminance signal Y is reduced in the transmission of a color television signal, and it is consistent with the visual observability of transmission line noise. A transmission method can be created.
また電気信号と画像表示装置上の表示が直線関係を有す
るので、色信号の伝送帯域は従来より狭くてよいし、伝
送路ノイズの影響も軽減され、MUSE伝送方式のように動
画と静止画とで異なった空間フィルタを用いるものでも
動画／静止画の切替えの不連続性が軽減される。In addition, since the electrical signal and the display on the image display device have a linear relationship, the transmission band of the color signal may be narrower than before, the influence of transmission line noise is reduced, and moving images and still images can be displayed like the MUSE transmission system. Even if different spatial filters are used, the discontinuity of switching between moving images / still images can be reduced.
第１図は本発明伝送方式をMUSE伝送方式に適用した実施
例の系統略ブロック線図を示し、 第２図は本発明に関わる実施例に使用される伝送路用非
線形補正回路の補正曲線の輝度信号分ΓＹ（ａ）と色信
号分ΓＣ（ｂ）とについて示す。 １……ガンマ逆補正回路 ２……マトリックス回路 3,12……輝度信号用LPF 4,13……広帯域色信号用LPF 5,14……狭帯域色信号用LPF 6,11……伝送用色信号非線形補正および逆補正回路 ７……MUSEエンコーダ 8,9……伝送用輝度信号非線形補正および逆補正回路 10……MUSEデコーダ 15……逆マトリックス回路 16……ガンマ補正回路FIG. 1 shows a schematic block diagram of an embodiment in which the transmission system of the present invention is applied to a MUSE transmission system, and FIG. 2 shows a correction curve of a non-linear correction circuit for a transmission line used in the embodiment related to the present invention. The luminance signal component Γ Y (a) and the color signal component Γ C (b) will be shown. 1 …… Gamma inverse correction circuit 2 …… Matrix circuit 3,12 …… Luminance signal LPF 4,13 …… Broadband color signal LPF 5,14 …… Narrowband color signal LPF 6,11 …… Transmission color Signal non-linear correction and inverse correction circuit 7 …… MUSE encoder 8,9 …… Transmission luminance signal non-linear correction and inverse correction circuit 10 …… MUSE decoder 15 …… Inverse matrix circuit 16 …… Gamma correction circuit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 合志 清一 東京都世田谷区砧１丁目10番11号 日本放 送協会放送技術研究所内 (72)発明者 岩舘 祐一 東京都世田谷区砧１丁目10番11号 日本放 送協会放送技術研究所内 (56)参考文献 特開 昭54−78621（ＪＰ，Ａ) 特公 昭59−15557（ＪＰ，Ｂ１) 特公 昭61−55316（ＪＰ，Ｂ１) テレビジョン学会技術報告（ＩＰＡ73− ７），「高品位テレビの衛星／チャンネル 伝送方式（ＭＵＳＥ）」，二宮祐一他（Ｎ ＨＫ），（1984年12月特許庁資料館受入) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiichi Koshi 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside the Japan Broadcasting Corporation Broadcasting Technology Laboratory (72) Inventor Yuichi Iwadate 1-10 Kinuta, Setagaya-ku, Tokyo No. 11 Inside Broadcasting Technology Research Institute of Japan Broadcasting Corporation (56) Reference JP 54-78621 (JP, A) JP 59-15557 (JP, B1) JP 61-55316 (JP, B1) Television Technical Report of the Society (IPA73-7), "Satellite / Channel Transmission System (MUSE) for High-Definition Television", Yuichi Ninomiya et al. (NHK), (Received by the Japan Patent Office Museum in December 1984)
Claims (5)
り、伝送系を構成する送信側にあっては、マトリックス
回路により三原色信号を輝度信号と２つの色差信号に変
換した後、これら各信号をエンコーダ回路に入力せしめ
てエンコーダ処理してコンポーネント映像信号として送
信し、前記伝送系を構成する受信側にあっては、送信さ
れてきた前記コンポーネント映像信号をデコーダ回路に
入力せしめてデコーダ処理した後、得られた輝度信号と
２つの色差信号を逆マトリックス回路によりもとの三原
色信号に復元するとともに、少なくとも輝度信号に関し
ては、送信側の前記エンコーダ回路の出力と受信側の前
記デコーダ回路の入力との間で伝送信号が非線形補正お
よび非線形逆補正され、送信側および受信側において定
輝度原理が成立するようにしたことを特徴とするコンポ
ーネント映像信号伝送方式。1. When transmitting a component video signal, on a transmission side which constitutes a transmission system, after converting a three-primary-color signal into a luminance signal and two color-difference signals by a matrix circuit, these signals are sent to an encoder circuit. At the receiving side that constitutes the transmission system, it is obtained by inputting the received component video signal to the decoder circuit and decoding it. The luminance signal and the two color difference signals are restored to the original three primary color signals by the inverse matrix circuit, and at least the luminance signal is transmitted between the output of the encoder circuit on the transmitting side and the input of the decoder circuit on the receiving side. The signal is non-linearly corrected and non-linearly inversely corrected, and the constant brightness principle is established on the transmitting side and the receiving side. Component video signal transmission method, characterized in that the the like.
記マトリックス回路の出力と受信側の前記逆マトリック
ス回路の入力との間で伝送信号が非線形補正および非線
形逆補正されることを特徴とする特許請求の範囲第１項
に記載のコンポーネント映像信号伝送方式。2. With respect to the two color difference signals, a transmission signal is subjected to nonlinear correction and nonlinear inverse correction between an output of the matrix circuit on the transmission side and an input of the inverse matrix circuit on the reception side. The component video signal transmission system according to claim 1.
れぞれについて個別の特性による補正であることを特徴
とする特許請求の範囲第２項に記載のコンポーネント映
像信号伝送方式。3. The component video signal transmission system according to claim 2, wherein the non-linear correction is correction based on individual characteristics for each of the luminance signal and the chrominance signal.
傾斜よりより緩やかな高い側の傾斜の特性曲線を有する
補正であることを特徴とする特許請求の範囲第２項また
は第３項に記載のコンポーネント映像信号伝送方式。4. The method according to claim 2 or 3, wherein the non-linear correction is a correction having a characteristic curve of a gradual slope on a high side rather than a slope on a low signal level side. Component video signal transmission method described.
記非線形補正に比して、信号レベルの高い側と低い側で
の傾斜の差異を小さくした特性曲線を有する補正である
ことを特徴とする特許請求の範囲第２項から第４項のい
ずれかに記載のコンポーネント映像信号伝送方式。5. The non-linear correction of a color signal is a correction having a characteristic curve in which a difference in inclination between a high signal level side and a low signal level side is smaller than that of the luminance signal. The component video signal transmission system according to any one of claims 2 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61282137A JPH0748877B2 (en) | 1986-11-28 | 1986-11-28 | Component video signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61282137A JPH0748877B2 (en) | 1986-11-28 | 1986-11-28 | Component video signal transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63136790A JPS63136790A (en) | 1988-06-08 |
| JPH0748877B2 true JPH0748877B2 (en) | 1995-05-24 |
Family
ID=17648590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61282137A Expired - Fee Related JPH0748877B2 (en) | 1986-11-28 | 1986-11-28 | Component video signal transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0748877B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2646576B1 (en) * | 1989-04-28 | 1991-07-05 | France Etat | TRANSCEIVING SYSTEM FOR TRANSMITTING COLOR MOVED IMAGES AND SOUND FROM INDEPENDENT CHANNELS |
| JPH03139089A (en) * | 1989-10-24 | 1991-06-13 | Fujitsu General Ltd | MUSE down converter |
| JPH0440754A (en) * | 1990-06-07 | 1992-02-12 | Matsushita Electric Ind Co Ltd | signal converter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011518B2 (en) * | 1977-12-05 | 1985-03-26 | 松下電器産業株式会社 | color imaging device |
| JPS5915557A (en) * | 1982-07-19 | 1984-01-26 | 株式会社山東鉄工所 | High temperature steam treating apparatus |
| JPS6155316A (en) * | 1984-08-28 | 1986-03-19 | Nissan Motor Co Ltd | Supercharging pressure controller |
-
1986
- 1986-11-28 JP JP61282137A patent/JPH0748877B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| テレビジョン学会技術報告（ＩＰＡ７３−７），「高品位テレビの衛星／チャンネル伝送方式（ＭＵＳＥ）」，二宮祐一他（ＮＨＫ），（１９８４年１２月特許庁資料館受入） |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63136790A (en) | 1988-06-08 |
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