JPS6367893A - Color video signal transmission method - Google Patents
Color video signal transmission methodInfo
- Publication number
- JPS6367893A JPS6367893A JP61212243A JP21224386A JPS6367893A JP S6367893 A JPS6367893 A JP S6367893A JP 61212243 A JP61212243 A JP 61212243A JP 21224386 A JP21224386 A JP 21224386A JP S6367893 A JPS6367893 A JP S6367893A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- video signal
- luminance
- vtr
- 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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- 238000000034 method Methods 0.000 title claims description 12
- 230000008054 signal transmission Effects 0.000 title claims description 8
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000000926 separation method Methods 0.000 abstract description 12
- 241000710177 Citrus tristeza virus Species 0.000 description 24
- 238000010586 diagram Methods 0.000 description 6
- 101100488882 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) YPL080C gene Proteins 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 101100381996 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) BRO1 gene Proteins 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はビデオテープレコーダなどのカラー映像信号送
信装置からカラーテレビジョンなどのカラー映像信号受
信装置へのカラー映像信号の伝送方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of transmitting color video signals from a color video signal transmitting device such as a video tape recorder to a color video signal receiving device such as a color television.
従来の技術
従来民生用ビデオテープレコーダ（ＶＴＲと略す）を扱
う分野においては、ＶＴＲとカラーテレビジョン（ＣＴ
Ｖと略す）間のカラー映像信号の伝送には基底帯域（ベ
ースバンド）であれ放送波帯域（ＲＦ帯域）であれ輝度
信号と搬送色信号を周波数多重した複合映像信号が用い
られている。2. Prior Art In the field of conventional consumer video tape recorders (abbreviated as VTR), VTR and color television (CT)
A composite video signal obtained by frequency-multiplexing a luminance signal and a carrier chrominance signal is used to transmit a color video signal between the baseband and the broadcast wave band (RF band).
たとえば、放送技術誌、昭和５８年８月号、５９〜７１
ページに記載されているようにＶＴＲといわゆるＡＶシ
ステムＴＶとのカラー映像信号の伝送には、ＶＴＲの映
像（ビデオ）出力端子よりＮＴＳＣ複合映像信号の基底
帯域信号を送信し、ＡＶシステムＴＶのビデオ入力端子
により受信するといった基底帯域伝送の形態をとってい
る。このようなＶＴＲとＣＴＶ間の複合映像信号の基底
帯域伝送は、放送波帯域における伝送に比べてＲＦ変換
器やフィルタを通さない分だけ複合映像信号の劣化が少
ない優れた伝送方式であるといえる。For example, Broadcasting Technology Magazine, August 1983 issue, 59-71.
As described on the page, to transmit color video signals between a VTR and a so-called AV system TV, the baseband signal of the NTSC composite video signal is transmitted from the video output terminal of the VTR, and the baseband signal of the NTSC composite video signal is transmitted from the video output terminal of the VTR, and the It takes the form of baseband transmission in which it is received through an input terminal. This baseband transmission of composite video signals between a VTR and CTV can be said to be an excellent transmission method that causes less deterioration of the composite video signal than transmission in the broadcast wave band because it does not pass through an RF converter or filter. .
しかしながら、たとえばＮＴＳＣ方式の民生用ＶＴＲに
おけるＶ ＨＳ規格やβ規格あるいは８菖璽ＶＴＲ規格
においては輝度信号と色信号は分離されて記録されてお
りながらもＶＴＲからの出力信号としては輝度信号と白
送色信号とを周波数多重した複合映像信号を出力し、Ｃ
ＴＶに伝送しＣＴＶ内でくし型フィルタなどを用いて再
び輝度信号と搬送色信号に周波数分離されるという周波
数多重と周波数分離という余分な動作が行なわれている
。即ち、輝度信号と搬送色信号の周波数多重や周波数分
離においてフィルタや増幅器の不完全性により伝送信号
の振幅および位相情報が損われ、更に回路雑音などが付
加し伝送信号の品質が劣化するという問題点を持ってい
る。However, for example, in the VHS standard and β standard of a consumer VTR using the NTSC system, or the 8-segment VTR standard, although the luminance signal and color signal are recorded separately, the output signal from the VTR is a luminance signal and a white signal. Outputs a composite video signal frequency-multiplexed with the color sending signal,
Extra operations of frequency multiplexing and frequency separation are performed in which the signal is transmitted to a TV and frequency-separated into a luminance signal and a carrier color signal using a comb filter or the like within the CTV. That is, in frequency multiplexing and frequency separation of luminance signals and carrier chrominance signals, the amplitude and phase information of the transmitted signal is lost due to imperfections in filters and amplifiers, and further circuit noise is added, deteriorating the quality of the transmitted signal. have points.
以下、図面を参照しながら上述した従来のＶＴＲとＣＴ
Ｖ間の複合映像信号としてのカラー映像信号の伝送方法
の例について説明する。第３図は従来のＶＴＲとＣＴＶ
間におけるカラー映像信号伝送システムの一例の要部ブ
ロック図である。第３図においてＶＴＲカラー映像信号
処理回路１の出力端子２．３および４にはそれぞれＶＴ
Ｒにおいて記録あるいは再生される輝度信号および色信
号が出力される。第３図においては出力端子２より輝度
信号（Ｙ信号、第２図（ａｌのＹ信号）が出力端子３お
よび４からは色信号（Ｉ信号、Ｑ信号、第２図（ｂ）の
Ｉ、 Ｑ信号）がそれぞれ出力されるとする。これらの
Ｙ、ＩおよびＱ信号はそれぞれローパスフィルタ１
（ＬＰＦＩと略す）、ＬＰＦ３およびＬＰＦ５に至り、
それぞれの出力は第２図（Ｃ１，ｆｄ）におけるＹ、、
１．およびＱｌの如く帯域制限を受ける。ＮＴＳＣ標準
方弐におけるＹ、 １およびＱ信号に対する帯域制限
はそれぞれ４．２Ｍ１１ｚ 、 １ 、５ Ｍ Ｈｚ
および０．５Ｍ１ｌｚである。ＬＰＦ３およびＬＰＦ５
の出力信号であるｌ、およびＱ、信号は直角二相変調器
１１に至り３．５７９５４５Ｍ ｌｌｚの副搬送波で殻
送波抑制直角二相振幅変調され第２図［ｇ）におけるに
信号となりＹ／Ｃ混合回路１３にてＬＰＦｌの出力信号
である第２図（Ｃ）におけるＹ、信号と周波数多重され
第２図（ｈ）に示す複合映像信号となる。ＶＴＲからＣ
ＴＶへの複合映像信号の伝送が基底帯域である場合には
Ｙ／Ｃ混合回路の出力はＶＴＲの出力端子１５より出力
されＣＴＶの入力端子１９より入力されＣＴ Ｖ内のＹ
／Ｃ分離回路２４に至る。またＶＴＲからＣＴＶへの複
合映像信号の伝送が放送波帯域である場合には、Ｙ／Ｃ
混合回路の出力はＲＦ変調器１４で放送波帯域に変調さ
れＶＴＲの出力端子１６よりＣＴＶの入力端子２０に至
りＲＦ復調器２３において再び基底帯域の複合映像信号
に復調されＣＴＶ内のＹ／Ｃ分離回路に至る。Ｙ／Ｃ分
制分路回路いては第２図（ｈ）で示される複合映像信号
を輝度信号（たとえば第２図（Ｃ）のｙｔ ）および搬
送色信号（たとえば第２図（ｇ）のＫ）に周波数分離し
それぞれＴＶカラー映像信号処理回路３５の入力端子３
３．３４に入力する。Hereinafter, the conventional VTR and CT described above with reference to the drawings will be explained.
An example of a method for transmitting a color video signal as a composite video signal between Vs will be described. Figure 3 shows conventional VTR and CTV
FIG. 2 is a block diagram of main parts of an example of a color video signal transmission system between the two. In FIG. 3, output terminals 2, 3 and 4 of the VTR color video signal processing circuit 1 each have VT
A luminance signal and a color signal to be recorded or reproduced in R are output. In Fig. 3, the luminance signal (Y signal, Y signal in Fig. 2 (al)) is output from output terminal 2, and the chrominance signal (I signal, Q signal, I, in Fig. 2 (b)) is output from output terminals 3 and 4. Suppose that the Y, I and Q signals are respectively outputted by the low-pass filter 1.
(abbreviated as LPFI), leading to LPF3 and LPF5,
Each output is Y in Fig. 2 (C1, fd),
1. and Ql are subject to bandwidth limitations. The band limits for the Y, 1 and Q signals in the NTSC standard are 4.2M11z, 1 and 5 MHz, respectively.
and 0.5M1lz. LPF3 and LPF5
The output signals l and Q of the signal go to the quadrature two-phase modulator 11 and are modulated with the subcarrier of 3.579545 Mllz to suppress the shell transmission and become the signal Y/ in Fig. 2 [g]. In the C mixing circuit 13, it is frequency-multiplexed with the Y signal in FIG. 2(C), which is the output signal of LPF1, and becomes a composite video signal shown in FIG. 2(h). C from VTR
When the composite video signal is transmitted to the TV in the base band, the output of the Y/C mixing circuit is output from the output terminal 15 of the VTR, inputted from the input terminal 19 of the CTV, and the
/C separation circuit 24. In addition, if the composite video signal is transmitted from the VTR to the CTV in the broadcast wave band, the Y/C
The output of the mixing circuit is modulated into the broadcast wave band by the RF modulator 14, and then sent from the output terminal 16 of the VTR to the input terminal 20 of the CTV, where it is demodulated again into a baseband composite video signal by the RF demodulator 23, and then Y/C in the CTV. This leads to a separation circuit. The Y/C distribution path circuit converts the composite video signal shown in FIG. 2(h) into a luminance signal (for example, yt in FIG. 2(C)) and a carrier color signal (for example, K in FIG. 2(g)). ) into input terminals 3 of the TV color video signal processing circuit 35.
3. Enter in 34.
発明が解決しようとする問題点
従来のＶＴＲとＣＴＶ間のカラー映像信号の伝送は前述
したように輝度信号と参送色信号が周波数多重された複
合映像信号の形態で伝送されるので、ＶＴＲ側での輝度
信号と搬送色信号の周波数多重やＴＶ側での周波数分離
においてフィルタや増幅器の不完全性により伝送信号の
振幅および位相情報が損われ波形歪が生じたり、回路雑
音が付加したりするので伝送信号の品質が劣化するとい
う大きな問題点を持っている。Problems to be Solved by the Invention As mentioned above, in the conventional transmission of color video signals between a VTR and a CTV, the luminance signal and the reference color signal are transmitted in the form of a composite video signal that is frequency-multiplexed. During frequency multiplexing of luminance signals and carrier chrominance signals on the TV side and frequency separation on the TV side, imperfections in filters and amplifiers can damage the amplitude and phase information of the transmitted signal, causing waveform distortion and adding circuit noise. Therefore, there is a major problem in that the quality of the transmitted signal deteriorates.
また、たとえばＮ Ｔ Ｓ Ｃ方式においては輝度信号
と搬送色信号は周波数インターリーブの関係て周波数多
重されており、輝度信号と色信号間の相互干渉によるク
ロス・カラーやクロス・ルミナンスが雑音となって画質
に与える悪影響が大きいという問題点がある。Furthermore, for example, in the NTS C system, the luminance signal and the carrier chrominance signal are frequency multiplexed with frequency interleaving, and cross color and cross luminance due to mutual interference between the luminance signal and chrominance signal become noise. There is a problem in that it has a large negative effect on image quality.
更に、ＮＴＳＣ方弐においては輝度信号の帯域は４．２
Ｍ１ｌｚ、色信号の帯域はＩ信号およびＱ信号に対して
それぞれ１．５ＭＨｚおよび０．５ＭＨｚと決まってい
るので当然のことながらＮ Ｔ Ｓ Ｃ方式の規格で決
まっているよりも広い帯域の輝度信号や色信号を伝送で
きない。Furthermore, in the NTSC system, the luminance signal band is 4.2
Since the bands of the M1lz and chrominance signals are determined to be 1.5 MHz and 0.5 MHz for the I signal and Q signal, respectively, it is natural that the luminance signal has a wider band than that determined by the NTC standard. and color signals cannot be transmitted.
本発明は上記問題点に鑑み、ＮＴＳＣ信号を扱うＶＴＲ
の出力回路系およびＣＴＶの入力回路系の簡単な付加変
更により、ＮＴＳＣ標準信号を扱う場合よりも高帯域で
高品質な輝度信号と搬送色信号の伝送をＶＴＲとＴＶ間
で容易に可能ならしめる伝送方法を提供するものである
。In view of the above problems, the present invention provides a VTR that handles NTSC signals.
By simple addition and modification of the output circuit system of the CTV and the input circuit system of the CTV, it is possible to easily transmit higher quality luminance signals and carrier color signals between the VTR and the TV in a higher band than when handling NTSC standard signals. This provides a transmission method.
問題点を解決するための手段
上記問題点を解決するために本発明においては、ＮＴＳ
Ｃ規格で制限された帯域よりも広い帯域の輝度信号と搬
送色信号をそれぞれ分離してＶＴＲより出力し、ＣＴＶ
に伝送する。ＣＴＶにおいては、これら広帯域な輝度信
号および搬送色信号は、Ｙ／Ｃ分離回路の輝度信号出力
および搬送色信号出力と切り換え、カラー映像信号処理
回路において広帯域で高品質なＲ，Ｇ、Ｂ信号に変換さ
れる。Means for Solving the Problems In order to solve the above problems, in the present invention, the NTS
The luminance signal and the carrier color signal in a band wider than the band limited by the C standard are separated and output from the VTR, and the CTV
to be transmitted. In a CTV, these wideband luminance signals and carrier color signals are switched to the luminance signal output and carrier color signal output of a Y/C separation circuit, and converted into wideband, high-quality R, G, and B signals in a color video signal processing circuit. converted.
作用
本発明においては上記した方法により、従来のＮＴＳＣ
複合映像信号を扱うＶＴＲおよびＣＴＶでありながら、
ＮＴＳＣ方式の規格によって決まっているよりも広帯域
でクロス・カラーやクロス・ルミナンスなどの相互干渉
がなく、しかも回路系の付加雑音のより少ない高品質な
カラー映像信号の伝送が可能となる。Operation In the present invention, by the method described above, the conventional NTSC
Although VTRs and CTVs handle composite video signals,
It is possible to transmit high-quality color video signals with a wider band than that determined by the NTSC standard, free from mutual interference such as cross color and cross luminance, and with less additional noise in the circuit system.
実施例
以下本発明のカラー映像信号伝送方法の一実施例につい
て図面を参照しながら説明する。第１図は本発明の一実
施例における要部ブロック図で−ある。第１図において
ＶＴＲ内のＶＴＲカラー映像信号処理回路１の出力端子
２．３および４にはそれぞれＶＴＲにおいて記録あるい
は再生される輝度信号および色信号が出力される。第１
図においては出力端子２より輝度信号（第２図（ａ）の
Ｙ信号）、出力端子３および４からは色信号（第２図（
ｂｌのＩ信号とＱ信号）がそれぞれ出力される。出力端
子２より出力されたＹ信号は２系統に分岐して一方はＮ
ＴＳＣ方式の帯域制限を行なうＴ−ＰＦｌに入力し、他
方はＬＰＦＩよりも通過帯域の広いＬＰＦ２に入力する
。また出力端子３より出力された■信号は２系統に分岐
し一方はＮＴＳＣ方式の帯域制限を行なうＬＰＦ３に入
力し、他方はＬＰＦ３よりも通過帯域の広いＬＰＦ４に
入力する。出力端子４より出力されたＱ信号は２系統に
分岐し一方はＮＴＳＣ方式の帯域制限を行なうＬＰＦ５
に入力し、他方はＬＰＦ５よりも通過帯域の広いＬＰＦ
６に入力する。その結果ＬＰＦＩ、ＬＰＦ３、ｍｐＦｓ
の出力はそれぞれ、第２図（Ｃ）におけるＹ、信号、第
２図（ｄｌにおけるＩ、信号およびＱ。Embodiment Hereinafter, an embodiment of the color video signal transmission method of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of main parts in one embodiment of the present invention. In FIG. 1, a luminance signal and a color signal to be recorded or reproduced in the VTR are outputted to output terminals 2.3 and 4 of a VTR color video signal processing circuit 1, respectively. 1st
In the figure, output terminal 2 outputs a luminance signal (Y signal in Figure 2(a)), and output terminals 3 and 4 output a color signal (Figure 2(a)).
bl I signal and Q signal) are output respectively. The Y signal output from output terminal 2 is branched into two systems, one of which is N.
The input signal is input to T-PFl which performs band limitation in the TSC method, and the other input is input to LPF2 which has a wider passband than LPFI. The (2) signal outputted from the output terminal 3 is branched into two systems, one of which is input to an LPF 3 that limits the band of the NTSC system, and the other is input to an LPF 4 which has a wider pass band than the LPF 3. The Q signal output from the output terminal 4 is branched into two systems, one of which is an LPF 5 that performs band limitation for the NTSC system.
and the other is an LPF with a wider passband than LPF5.
Enter 6. As a result, LPFI, LPF3, mpFs
The outputs of are Y, signal in FIG. 2(C), I, signal and Q in FIG. 2(dl), respectively.
信号となる。またＬＰＦ２．ＬＰＦ４．ＬＰＦ６の出力
はそれぞれ第２図（ｅｌにおけるＹ２信号、第２図（「
）におけるＩ２信号およびＱ２信号となる。It becomes a signal. Also LPF2. LPF4. The output of LPF6 is shown in Fig. 2 (Y2 signal at el, Fig. 2 ('
) are the I2 signal and Q2 signal.
ＬＰＦ３の出力である１１信号とＬＰＦ５の出力である
Ｑ、信号とは直角二相変調器１１においてＮＴＳＣ方式
における副産送波でし送波抑制直角二相振幅変調され第
２図（ｇ）におけるに信号に変換され、Ｙ／Ｃ混合回路
１３においてＬＰＦ １の出力であるＹ１信号と周波数
多重され第２図（ｈ）に示される複合映像信号となる。The 11 signal that is the output of LPF 3 and the Q signal that is the output of LPF 5 are transmitted in the quadrature two-phase modulator 11 using the by-product transmission wave in the NTSC system, and are suppressed by quadrature two-phase amplitude modulation, as shown in FIG. 2 (g). The Y/C mixing circuit 13 frequency-multiplexes the signal with the Y1 signal output from the LPF 1, resulting in a composite video signal shown in FIG. 2(h).
ＶＴＲからＣＴＶへの複合映像信号の伝送が基底帯域で
ある場合にはＹ／Ｃ混合回路の出力はＶＴＲの出力端子
１５より出力されＣＴＶの入力端子１９より入力されＣ
ＴＶ内のＹ／Ｃ分離回路２４に至る。またＶＴＲからＣ
ＴＶへの複合映像信号の伝送が放送波帯域である場合に
は、Ｙ／Ｃ混合回路の出力はＲＦ変調器１４で放送波帯
域に変調されＶＴＲの出力端子１６よりＣＴＶの入力端
子２０に至りＲＦ復調器２３において再び基底帯域の複
合映像信号に復調されてＣＴＶ内のＹ／Ｃ分離回路２４
に至る。Ｙ／Ｃ分離回路においては第２図（ｈｌで示さ
れる複合映像信号を第２図ｆｃ）のＹ、信号で示される
輝度信号と第２図Ｆｇｌのに信号で示される搬送色信号
に周波数分離されそれぞれスイッチ２５の入力端子２６
およびスイッチ２９の入力端子３０に入力される。とこ
ろでＬＰＦ４の出力信号であるＩ２信号とＬＰＦ６の出
力信号であるＱ２信号は直角二相変調器１２においてＮ
Ｔ Ｓ Ｃ方式における副搬送波で直角二相振幅変調
され第２図（１）におけるに１倍号となりＶＴＲの出力
端子１８より出力されＣＴＶの入力端子２２に至りＣＴ
Ｖ内のスイッチ２９の入力端子３１に至る。またＬＰＦ
２の出力信号であるＹ２２倍はＶ Ｔ Ｒの出力端子１
７より出力されＣＴＶの入力端子２１に至りＣＴＶ内の
スイッチ２５の入力端子２７に至る。スイッチ２５の出
力端子２８にＹ、信号を出力させる時は入力端子２６と
出力端子２８を４通させ、Ｙ２２倍を出力させる時には
入力端子２７と出力端子２８とを導通させる。When the composite video signal is transmitted from the VTR to the CTV in the baseband, the output of the Y/C mixing circuit is output from the output terminal 15 of the VTR and input from the input terminal 19 of the CTV.
It reaches the Y/C separation circuit 24 in the TV. Also, from the VTR
When the composite video signal is transmitted to the TV in the broadcast wave band, the output of the Y/C mixing circuit is modulated into the broadcast wave band by the RF modulator 14 and is transmitted from the output terminal 16 of the VTR to the input terminal 20 of the CTV. The RF demodulator 23 demodulates the baseband composite video signal again and sends it to the Y/C separation circuit 24 in the CTV.
leading to. In the Y/C separation circuit, the frequency is separated into a luminance signal shown by the Y signal in Fig. 2 (the composite video signal shown by hl is shown in Fig. 2 fc) and a carrier color signal shown by the signal Fgl in Fig. 2. and the input terminal 26 of the switch 25, respectively.
and is input to the input terminal 30 of the switch 29. By the way, the I2 signal which is the output signal of LPF4 and the Q2 signal which is the output signal of LPF6 are N
The quadrature two-phase amplitude modulation is performed using the subcarrier in the TSC system, resulting in a signal of 1 in Fig. 2 (1), which is output from the output terminal 18 of the VTR, and reaches the input terminal 22 of the CTV.
to the input terminal 31 of the switch 29 in V. Also LPF
The output signal of 2, Y22 times, is the output terminal 1 of VTR.
7 and reaches the input terminal 21 of the CTV, and then the input terminal 27 of the switch 25 in the CTV. When outputting the Y signal to the output terminal 28 of the switch 25, the input terminal 26 and the output terminal 28 are connected four times, and when outputting Y22 times the signal, the input terminal 27 and the output terminal 28 are connected.
またスイッチ２９の出力端子３２にに信号を出力させる
時は入力端子３０と出力端子３２を導通させ、Ｋ１信号
を出力させる時には入力端子３１と出力端子３２とを導
通させる。スイッチ２５およびスイッチ２９の２つの出
力端子２８および３２はそれぞれＴＶカラー映像信号処
理回路３５０入力端子３３および３４に接続されている
。即ちスイッチ２５および２９においてＴＶカラー映像
信号処理回路に入力する輝度信号と搬送色信号を切り換
えることができる。即ちＮＴＳＣ規格の信号よりも広帯
域な輝度信号と搬送色信号をＴＶカラー映像処理回路に
入力することができる。さてＴＶカラー映像処理回路３
５の入力端子３４より入力した広帯域な崖送色信号もＮ
ＴＳＣ方式の副搬送波で変調されているので、広帯域な
Ｉ２信号およびＱ２２倍あるいはＲ−Ｙ信号およびＢ−
Ｙ信号などに復調するのは容易である。搬送色信号復調
回路のフィルタの通過帯域を１．信号、Ｑ１１倍、Ｉ２
信号およびＱ２２倍などにより制御することにより信号
対雑音比の良好な色差信号が得られその結果広帯域で高
品質なＲＧＢ信号が得られる。Further, when outputting a signal to the output terminal 32 of the switch 29, the input terminal 30 and the output terminal 32 are made conductive, and when the K1 signal is output, the input terminal 31 and the output terminal 32 are made conductive. Two output terminals 28 and 32 of switch 25 and switch 29 are connected to TV color video signal processing circuit 350 input terminals 33 and 34, respectively. That is, the switches 25 and 29 can switch between the luminance signal and the carrier color signal input to the TV color video signal processing circuit. That is, it is possible to input a luminance signal and a carrier color signal having a wider band than the NTSC standard signal to the TV color video processing circuit. Now, TV color video processing circuit 3
The broadband cliff color feed signal input from the input terminal 34 of 5 is also N.
Since it is modulated with the TSC subcarrier, wideband I2 signals and Q22 times or R-Y signals and B-
It is easy to demodulate into a Y signal or the like. The pass band of the filter of the carrier color signal demodulation circuit is set to 1. Signal, Q11 times, I2
By controlling the signal and multiplying by Q22, etc., a color difference signal with a good signal-to-noise ratio can be obtained, and as a result, a wide band and high quality RGB signal can be obtained.
以上詳述したようにＮＴＳＣ方式のＶＴＲとＣＴＶ間の
カラー映像信号の伝送においてＮＴＳＣ規格よりも広帯
域で高品質な輝度信号と色信号の伝送を簡単に行なうこ
とができる。As described in detail above, in the transmission of color video signals between an NTSC VTR and a CTV, it is possible to easily transmit higher quality luminance signals and color signals over a wider band than the NTSC standard.
実施例においては広帯域な輝度信号と色信号の送信源と
してＶＴＲ１また受信機としてはＣＴＶである場合につ
いて述べたが、送信源としてはビデオディスクやレーザ
ディスクなどあらゆるパッケージ系のメディアやＣＡＴ
Ｖや新しい放送系態などあらゆる送信系に通用できる。In the embodiment, a VTR1 is used as the transmission source of the wideband luminance signal and color signal, and a CTV is used as the receiver.
It can be used for all kinds of transmission systems such as V and new broadcasting systems.
また受信機としてはＣＲＴのＣＴＶのみならず液晶など
を用いた平面ディスプレーや投写型ＴＶなどあらゆるカ
ラー映像信号表示装置に適用できる。更に実施例におい
てはＹ、 ＩおよびＱ信号を取り扱う場合について述
べたが、Ｙ、Ｒ−ＹおよびＢ−Ｙ信号やＲＡＧおよびＢ
信号などを取り扱う場合についても、これらカラー映像
信号の間には一対一の対応関係があるので、あらゆるカ
ラー映像信号を扱う場合にも本発明は適用できる。Further, as a receiver, it can be applied not only to a CRT (CTV), but also to any color video signal display device such as a flat display using a liquid crystal or the like, or a projection TV. Furthermore, in the embodiment, the case where Y, I and Q signals are handled has been described, but it is also possible to handle Y, R-Y and B-Y signals, RAG and B
Even when dealing with signals, etc., there is a one-to-one correspondence between these color video signals, so the present invention can be applied to cases where all color video signals are handled.
また、実施例においてはＮ Ｔ Ｓ Ｃ方式における場
合について述べたがＰＡＬ方式やＳＲＣＡＭ方式などの
国際的に標準化された方式を含むあらゆる複合映像信号
を扱うカラー映像信号伝送系に本発明を適用することが
可能である。Further, in the embodiment, the case of the NTS C system is described, but the present invention can be applied to a color video signal transmission system that handles all composite video signals including internationally standardized systems such as the PAL system and the SRCAM system. Is possible.
更に本実施例においては輝度信号と搬送色信号がそれぞ
れ異なった複数の伝送路により伝送される場合について
述べたが、これら九１度信号と搬送色信号はそれぞれ異
なった周波数帯域に周波数多重したり、更に時間軸圧縮
多重したりして伝送することも可能である。たとえば色
信号はＮＴＳＣ副搬送波周波数の２倍の周波数を持つ副
搬送波で変調し搬送色信号に変換し、この搬送色信号と
周波数帯域の異なる基底帯域の輝度信号と周波数多重し
て伝送することなども可能である。Furthermore, in this embodiment, a case has been described in which the luminance signal and the carrier chrominance signal are transmitted through a plurality of different transmission paths, but the 91 degree signal and the carrier chrominance signal may be frequency multiplexed into different frequency bands, respectively. Furthermore, it is also possible to perform time axis compression multiplexing and transmission. For example, a color signal is modulated with a subcarrier with a frequency twice the NTSC subcarrier frequency, converted to a carrier color signal, and then frequency-multiplexed with a baseband luminance signal in a different frequency band and transmitted. is also possible.
発明の効果
従来の民生用ＶＴＲとＣＴＶ間のカラー映像信号の伝送
は、上述したようにたとえばＮＴＳＣ方式の複合映像信
号の形態で行なわれており、ＮＴＳＣ規格によって輝度
信号と色信号の帯域が制限されているし、それぞれの相
互干渉による妨害やＹ／Ｃ分離フィルタなどによる波形
歪や回路系の付加雑音が加わり伝送されたカラー映像信
号の品質が劣化している。Effects of the Invention Conventionally, color video signals are transmitted between a consumer VTR and a CTV in the form of a composite video signal of the NTSC system, for example, as described above, and the bands of luminance signals and color signals are limited by the NTSC standard. In addition, the quality of the transmitted color video signal is degraded by interference due to mutual interference, waveform distortion due to Y/C separation filters, and additional noise from the circuit system.
本発明によれば、ＮＴＳＣ規格のＶＴＲやＣＴ■を用い
てＮＴＳＣ規格の輝度信号や色信号よりも広帯域で高品
質な輝度信号や色信号を伝送できるという大きな効果が
ある。特にＶＴＲなどのカラー映像信号出力が放送波な
どＮＴＳＣ系のカラー映像信号を記録再生したものでな
くビデオカメラなどにおいて特にＮＴＳＣ系を通らない
ような輝度信号や色信号である場合に本発明による画質
改善の効果は非常に大きい。According to the present invention, it is possible to transmit luminance signals and color signals of higher quality in a wider band than those of the NTSC standards using a VTR or CT of the NTSC standards. In particular, when the color video signal output of a VTR or the like is not a recording and reproduction of an NTSC color video signal such as a broadcast wave, but is a luminance signal or color signal that does not pass through the NTSC system in a video camera, etc., the image quality according to the present invention can be improved. The effects of the improvement are huge.
第１図は本発明の一実施例における要部ブロック図、第
２図（ａ）〜（１１は本発明の一実施例および従来例に
おける輝度信号と色信号の周波数帯域での関係を説明す
る説明図、第３図は従来例における要部ブロック図であ
る。
１・・・・・・ＶＴＲカラー映像信号処理回路、５・・
・・・・ＬＰＦ １．６・・・・・・ＬＰＦ２．７・・
・・・・ＬＰＦ３．８・・・・・・ＬＰＦ４．９・・・
・・・ＬＰＦ５．１０・・・・・・ＬＰＦ６．１１・・
・・・・直角二相変調器、１２・・・・・・直角二相変
調器、１３・・・・・・Ｙ／Ｃ混合回路、１４・・・・
・・ＲＦ変調器、２３・・・・・・ＲＦ復調器、２４・
・・・・・Ｙ／Ｃ分離回路、２５′Ｂよび２９・・・・
・・スイッチ、３５・・・・・・ＴＶカラー映像信号処
理回路。
代理人の氏名 弁理士 中尾敏男 はか１名菓 ２ 図FIG. 1 is a block diagram of main parts in an embodiment of the present invention, and FIGS. 2(a) to (11) explain the relationship in frequency bands between luminance signals and chrominance signals in an embodiment of the present invention and a conventional example. The explanatory diagram and FIG. 3 are block diagrams of main parts in the conventional example. 1... VTR color video signal processing circuit, 5...
...LPF 1.6...LPF2.7...
...LPF3.8...LPF4.9...
...LPF5.10...LPF6.11...
... Quadrature two-phase modulator, 12... Quadrature two-phase modulator, 13... Y/C mixed circuit, 14...
...RF modulator, 23...RF demodulator, 24.
...Y/C separation circuit, 25'B and 29...
...Switch, 35...TV color video signal processing circuit. Name of agent: Patent attorney Toshio Nakao Haka 1 Meika 2 Diagram
Claims (4)
度信号と前記搬送色信号とをそれぞれ分離して伝送する
ことを特徴とするカラー映像信号伝送方法。(1) A color video signal transmission method characterized in that a color signal is modulated by a subcarrier to obtain a carrier color signal, and a luminance signal and the carrier color signal are transmitted separately.
は、それぞれ異なった複数の伝送路により伝送されるこ
とを特徴とする特許請求の範囲第（１）項記載のカラー
映像信号伝送方法。(2) The color video signal transmission method according to claim (1), wherein the luminance signal and the carrier color signal, which are transmitted separately, are transmitted through a plurality of different transmission paths.
は複合映像信号の送信装置において前記複合映像信号の
周波数多重に用いる輝度信号と搬送色信号よりもそれぞ
れあるいは少なくとも一方は広い帯域を持った輝度信号
および搬送色信号であることを特徴とする特許請求の範
囲第（１）項記載のカラー映像信号伝送方法。(3) The luminance signal and carrier chrominance signal that are separated and transmitted have a wider band, or at least one of them, than the luminance signal and carrier chrominance signal used for frequency multiplexing of the composite video signal in the composite video signal transmitting device. The color video signal transmission method according to claim 1, wherein the color video signal is a luminance signal and a carrier color signal.
は複合映像信号の受信装置において前記複合映像信号が
周波数分離された輝度信号と搬送色信号とそれぞれ切り
換えられることを特徴とする特許請求の範囲第（１）項
記載のカラー映像信号伝送方法。(4) The luminance signal and carrier chrominance signal that are separated and transmitted are switched in a composite video signal receiving device into a luminance signal and a carrier chrominance signal, respectively, in which the composite video signal is frequency-separated. A color video signal transmission method according to scope (1).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61212243A JPH0683480B2 (en) | 1986-09-09 | 1986-09-09 | Color video signal transmission method |
| US07/092,878 US4864421A (en) | 1986-09-09 | 1987-09-03 | System for connecting a video signal recording/reproducing apparatus and a television receiver |
| EP87307921A EP0260861B1 (en) | 1986-09-09 | 1987-09-08 | System for connecting a video signal recording/reproducing apparatus and a television receiver |
| DE3750008T DE3750008T2 (en) | 1986-09-09 | 1987-09-08 | System for connecting a video recording / playback device to a television receiver. |
| KR1019870009961A KR920000884B1 (en) | 1986-09-09 | 1987-09-09 | System for connecting a video signal recoding/reproducing apparatus and a television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61212243A JPH0683480B2 (en) | 1986-09-09 | 1986-09-09 | Color video signal transmission method |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62205694A Division JPH0824372B2 (en) | 1987-08-19 | 1987-08-19 | Color video signal display device |
| JP20569387A Division JPH0822071B2 (en) | 1987-08-19 | 1987-08-19 | Color video signal processor |
| JP62205695A Division JPS6379495A (en) | 1987-08-19 | 1987-08-19 | Color video signal transmitting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6367893A true JPS6367893A (en) | 1988-03-26 |
| JPH0683480B2 JPH0683480B2 (en) | 1994-10-19 |
Family
ID=16619341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61212243A Expired - Lifetime JPH0683480B2 (en) | 1986-09-09 | 1986-09-09 | Color video signal transmission method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0683480B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55171176U (en) * | 1980-05-08 | 1980-12-08 | ||
| JPS6184190A (en) * | 1984-09-29 | 1986-04-28 | Nec Home Electronics Ltd | Television receiver |
-
1986
- 1986-09-09 JP JP61212243A patent/JPH0683480B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55171176U (en) * | 1980-05-08 | 1980-12-08 | ||
| JPS6184190A (en) * | 1984-09-29 | 1986-04-28 | Nec Home Electronics Ltd | Television receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0683480B2 (en) | 1994-10-19 |
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