JPS5839190A - Video system - Google Patents
Video systemInfo
- Publication number
- JPS5839190A JPS5839190A JP56137161A JP13716181A JPS5839190A JP S5839190 A JPS5839190 A JP S5839190A JP 56137161 A JP56137161 A JP 56137161A JP 13716181 A JP13716181 A JP 13716181A JP S5839190 A JPS5839190 A JP S5839190A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- modulation
- low
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は一健記鍮を行なうビデオシステムに関する。[Detailed description of the invention] The present invention relates to a video system for performing Ikkenki Brass.
従来、ビデオシステムに於いてカメラは撮倫管あるいは
固体撮倫板によ）取り出された映倫信号を輝度信号とＲ
，Ｂ信号に分離しエンコーダーによ）カラー映倫信号と
して出力する構成であ〕、ま、たＶＴＲは記録時、カラ
ー映像信号の輝度信号と色信号に分離し、輝度信号をＦ
Ｍ変調すると共に色信号を低域側に周波数変換し、仁の
ＦＭ変調された輝度信号と周波数変換された色信号を混
合して記帰し、再生時は再生信号を輝度信号と色信号に
分離し、輝度信号はＦＭ復調し色信号はもとの帯域に周
波数逆変換しＦＭ復調した輝度信号と周波数逆変換した
色信号を混合し、カラー映像信号として出力する様構成
されていた。Conventionally, in a video system, a camera converts a video signal extracted from a camera tube or a solid-state camera board into a luminance signal and R.
, B signal and outputs it as a color video signal by an encoder).Furthermore, during recording, the VTR separates the color video signal into a luminance signal and a chrominance signal, and outputs the luminance signal as an F signal.
At the same time as M modulation, the color signal is frequency-converted to the lower frequency side, the FM-modulated luminance signal and the frequency-converted color signal are mixed and recorded, and during playback, the reproduced signal is separated into a luminance signal and a color signal. However, the luminance signal is FM demodulated, the color signal is frequency inversely converted to the original band, and the FM demodulated luminance signal and the frequency inversely converted color signal are mixed and output as a color video signal.
従来のシステムではカメラからＶＴＲＫ伝送する信号形
態が力２−映像信号であったためＶＴＲ側では輝度信号
と色信号とに分離するのにフィルターが、また色信号を
低域側に周波組変換するため、周波数変換器、発振器等
が必要となシ回路が複雑大形となるとともに伝送歪も生
じやすくなるという欠点があった。In the conventional system, the signal format transmitted from the camera to the VTRK was a 2-video signal, so on the VTR side, a filter was used to separate the luminance signal and the color signal, and a filter was used to convert the color signal to the lower frequency side. However, the disadvantages are that the circuit, which requires a frequency converter, an oscillator, etc., becomes complex and large, and transmission distortion is likely to occur.
本発明は上述の点に鑑み改良したビデオシステムを提供
するものである。The present invention provides an improved video system in view of the above points.
本発明の他の目的は色差信号を低域変換搬送波で直角二
相変調した低域変換色信号とＦＭ変調された輝度信号を
混合して配録するビデオシステムを提供する。Another object of the present invention is to provide a video system that mixes and distributes a low frequency conversion color signal obtained by quadrature two-phase modulation of a color difference signal using a low frequency conversion carrier wave and an FM modulated luminance signal.
第１図は本発明の実施例で１はカメラ部２とＶＴＲの記
録部からなる記録専用機、３け再生専用機を示す。４Ｉ
／ｉ撮倫部、５は輝度信号分離回路、６はＲ，Ｂ信号分
離回路、７は輝度信号分離回路５、ＲＢ信号分離回路６
の信号から輝度信号色差信号を作るマトリックス回路、
８はＲ−Ｙ変調器、９はＢ−Ｙ変ｇ４器、ｌＯはバース
トフラッグ、水平同期信号、フレームパルス、変調用の
低域変調信号等を作る同期信号発生回路、１１は低域変
調信号の位相をシフトする位相シフト回路、１２は９０
位相シフト回路、１３は輝度信号に直流を重畳する直流
重畳回路、１４はＡＧＯ（オートゲインコントローラ）
、１５はＦＭ変調器、１６はバイパスフィルタ（Ｈ，Ｐ
。FIG. 1 shows an embodiment of the present invention, in which numeral 1 indicates a recording-only machine consisting of a camera section 2 and a VTR recording section, and a 3-digit playback-only machine. 4I
/i photography department, 5 is a brightness signal separation circuit, 6 is an R, B signal separation circuit, 7 is a brightness signal separation circuit 5, RB signal separation circuit 6
A matrix circuit that creates luminance and color difference signals from the signals of
8 is a R-Y modulator, 9 is a B-Y converter g4, IO is a synchronization signal generation circuit that generates a burst flag, a horizontal synchronization signal, a frame pulse, a low-frequency modulation signal for modulation, etc., and 11 is a low-frequency modulation signal. A phase shift circuit that shifts the phase of 12 is 90
Phase shift circuit, 13 is a DC superimposition circuit that superimposes DC on the luminance signal, 14 is AGO (auto gain controller)
, 15 is an FM modulator, 16 is a bypass filter (H, P
.
Ｆ）、１７は色信号のレベルを調整するレベル調整器、
１８は記録アンプ、１９は記録と再生の切換回路、２０
はロータリートランス、２１はヘッド、２２は再生アン
プ、２３は再生信号から色信号を、分離するローパスフ
ィルタ（Ｌ、Ｐ。F), 17 is a level adjuster for adjusting the level of the color signal;
18 is a recording amplifier, 19 is a recording/playback switching circuit, 20
21 is a rotary transformer, 21 is a head, 22 is a reproduction amplifier, and 23 is a low-pass filter (L, P) that separates the color signal from the reproduction signal.
Ｆ）、ｚ４ａオートクロマ−コント目−ラ、Ａｏｏ、２
５は周波数変換回路、２６は周波敬愛 ・換に必要な信
号を作る周波数変換信号発生回路、２７はバンドパルス
フィルタＢ、Ｐ、Ｆ、２ｇはクロストーク除去のくし形
フィルタ、２９は輝度分離のバイパスフィルタＨ，Ｐ、
Ｆ、 ３０はＦＭ復調器、３１はローパスフィルタＬ、
Ｐ、Ｆ、 ３２は再生映倫出力端子である。Ａ１〜ＡＩ
は加算回路である。F), z4a autochroma control, Aoo, 2
5 is a frequency conversion circuit, 26 is a frequency conversion signal generation circuit that generates the signals necessary for frequency conversion, 27 is band pulse filters B, P, and F, 2g is a comb filter for crosstalk removal, and 29 is a brightness separation filter. Bypass filter H, P,
F, 30 is an FM demodulator, 31 is a low-pass filter L,
P, F, 32 are playback output terminals. A1~AI
is an adder circuit.
次に上述の構成の動作について説明すると撮倫管、固体
撮像板等から取り出された映倫信号を輝度信号分離回路
５、ＲＢ信号分離回路６で輝度信号とＲＢ信号に分離し
、さらにマトリックス回路７により輝度信号Ｒ−Ｙ、Ｂ
−ＹＯ色差信号に変換される。一方同期信号発生回路ｌ
Ｏで作られた低域変換用変調信号、たとえば４０ｆＨは
位相シフト回路１１によ＃）ｌフィールド期間はＩＨご
とに＋９０ずつ、次のフィールド期間はＩＨごとに−９
０ずつ位相が変えられる。Next, the operation of the above-mentioned configuration will be explained. The image signal taken out from the camera tube, solid-state image pickup board, etc. is separated into a brightness signal and an RB signal by the brightness signal separation circuit 5 and the RB signal separation circuit 6, and then the matrix circuit 7 The luminance signals R-Y, B
-YO is converted into a color difference signal. On the other hand, the synchronization signal generation circuit l
The modulation signal for low-frequency conversion, for example 40fH, generated by #) is applied to the phase shift circuit 11 by +90 for each IH in the field period, and -9 for each IH in the next field period.
The phase can be changed by 0.
位相回転する４０ｆＨの低域変換用変調信号はＲ−Ｙ変
調器８に、また、その位相回転する４０ｆＨをさらに９
０位相シフトした信号はＢ−Ｙ変調器９に送られる。よ
って変調器８・９からの出力の合成信号はＲ−Ｙ、Ｂ−
Ｙ信号を４゜ｆＨの低域変換用変調信号で直角二相変調
され、しかもその搬送波はあるフィールドではＩＨとと
に位相が＋９０ずつ、次のフィールドではｌＨごとに位
相が−９０ずつ回転する。そして適当力レベルにレベル
調整器１７で調整され記録アンプ１８に送られる。マト
リックス回路７を出た輝度信号と同期信号発生回路１０
で作られた複合同期信号は混合され直流重畳回路１２に
接続される。直流重畳回路１２では同期信号の付加され
た輝度信号をクランプするか、単に直角二相変調され、
Ｈ，Ｐ、Ｆ、 １６を通し記録アンプ１８に送られる。The phase-rotated 40fH low-frequency conversion modulation signal is sent to the R-Y modulator 8, and the phase-rotated 40fH is further sent to the RY modulator 8.
The zero phase shifted signal is sent to the BY modulator 9. Therefore, the combined signals of the outputs from the modulators 8 and 9 are R-Y, B-
The Y signal is quadrature two-phase modulated with a 4°fH low-frequency conversion modulation signal, and the carrier wave has a phase of +90 for each IH in one field, and a phase of -90 for each IH in the next field. . Then, the power is adjusted to an appropriate power level by a level adjuster 17 and sent to a recording amplifier 18. Luminance signal output from matrix circuit 7 and synchronization signal generation circuit 10
The composite synchronization signal generated by the above is mixed and connected to the DC superimposition circuit 12. The DC superimposition circuit 12 clamps the luminance signal to which the synchronization signal has been added, or simply modulates the luminance signal with two-phase quadrature modulation.
It is sent to the recording amplifier 18 through H, P, F, 16.
記録アンプ１８では低域変換され九色信号とＦＭ１変調
された輝度信号を加算圏路入で混合し増幅し１スイツチ
１９を８側にすることｋよつ工テープに記録する。再生
時はスイッチ１９がＰ＠にされ再生出力が再生ア“／プ
２２で増幅され記録専用機から出力される。増幅された
再生出力は再生専用機３に入力され、まずＨ，Ｐ、Ｆ、
２９１Ｃ！ ！ｌ）輝度信号は分離されＦＭ復調され
り、Ｐ、 Ｆ、 ２３ Ｙ−よ）帯′域制隈される。In the recording amplifier 18, the nine color signals subjected to low frequency conversion and the luminance signal modulated by FM1 are mixed and amplified in the addition circuit, and the signal is recorded on the tape by setting the switch 19 to the 8 side. During playback, the switch 19 is set to P@, and the playback output is amplified by the playback amplifier 22 and output from the recording-only device.The amplified playback output is input to the playback-only device 3, and first the H, P, F ,
291C! ! l) The luminance signal is separated and FM demodulated and band-limited (P, F, 23 Y-).
一方、色信号はＬＰ、Ｆ、２３によ砂分離されＡＯＯ２
４でレベルを一定にし周波数変換回路２５で低域変換さ
れ一色信号をカラー映像信号と同じ高域の帯域に逆変換
しＢ、Ｐ、 Ｆ、 ２７を通し、さらＫ＜Ｌ形フィルタ
２８によりクロストークを除去し、輝度信号と混合して
出力される。On the other hand, the color signal is separated by LP, F, 23 and AOO2
4, the level is kept constant, and the frequency conversion circuit 25 performs low frequency conversion, and the one-color signal is inversely converted to the same high frequency band as the color video signal, passed through B, P, F, 27, and then crossed by a K<L type filter 28. The talk is removed, mixed with the luminance signal, and output.
次に本発明の他の実施例を説明する。Next, another embodiment of the present invention will be described.
−２図はカメラとライン入力端子をもつＶＴＲ３，４か
らなるビデオシステムの一実施例でそれについて説明す
る。第１図と同じプ四ツクは同番号で示しである。３３
はカメラ２からの輝度信号入力端子、３４はカメラ２か
らの色信号入力端子、３５はライン入力端子、３６は入
力信号がカメラ側からかライン入力からかを検出する入
力信号検出回路、３７はカメラからの色信号のレベル調
整器への供給を制御するスイッチ、３８はＡＧＯｌ ４
からの信号のＢ、Ｐ、Ｆ２Ｏへの供給を制御するスイッ
チ、４０は色信号分離用バンドパスフィルタ（Ｂ、Ｐ、
Ｆ、 ）、４１はＡＯＯ２４と同じＡＯｏ、４２は高域
にある色信号を低域側に変換する周波数変換器、４３は
低域周波数変換に用いられる信号を作る周波数変換信号
発生回路、４４は低域変換色信号をとりだすローメスフ
ィルタ（Ｌ、Ｐ、 Ｆ、 ）を示す。ん〜Ａｔ Ｂ加算
回路である。Figure 2 shows an example of a video system consisting of a camera and VTRs 3 and 4 having line input terminals. The same bicycles as in FIG. 1 are designated by the same numbers. 33
is a luminance signal input terminal from the camera 2, 34 is a color signal input terminal from the camera 2, 35 is a line input terminal, 36 is an input signal detection circuit that detects whether the input signal is from the camera side or the line input, and 37 is an input signal detection circuit. A switch for controlling the supply of color signals from the camera to the level adjuster, 38 is AGOl 4
40 is a bandpass filter for color signal separation (B, P,
F, ), 41 is the same AOo as AOO24, 42 is a frequency converter that converts the color signal in the high frequency range to the low frequency side, 43 is a frequency conversion signal generation circuit that generates a signal used for low frequency conversion, 44 is a The figure shows low female filters (L, P, F, ) that extract low-pass converted color signals. It is an At B addition circuit.
上述の構成より成る実施例の動作について説明する。The operation of the embodiment configured as described above will be explained.
本実施例ではライン入力端子３５がもうけられてお）こ
こからは通常のカラー映倫信号が入いってくる。In this embodiment, a line input terminal 35 is provided, from which a normal color video signal is input.
一方、カメラからの信号は輝度信号と低域変換された色
信号であるため、これらを検出して回路を切換なければ
ならない。ところでカメラの輝度信号出力はある直流レ
ベルが重畳されて入力端子３３に入いってくる。そこで
入力信号検出回路３６で、とれを検出することｋより今
入力されてｂる信号がカメラの信号であるか、ライン入
力信号であるかを判別できる。実際にはこの回路はコン
パレータ等の簡単な回路で構成する。。On the other hand, since the signals from the camera are a luminance signal and a low frequency converted color signal, these must be detected and the circuit must be switched. By the way, the luminance signal output from the camera enters the input terminal 33 with a certain DC level superimposed thereon. Therefore, the input signal detection circuit 36 can determine whether the currently input signal is a camera signal or a line input signal by detecting the deviation. In reality, this circuit is composed of simple circuits such as comparators. .
まず入力信号がカメラからの場合について説明すると入
力端子３３からは直流が重畳された輝度信号が、端子３
４からは低域変換された色信号が入いつてくると、入力
信号検出回路３６で直流分を一出してスイッチ３７ｄＯ
Ｎ、３８のスイッチ３８はＯＦＦされる。よって色信号
はレベル調整器ｌフを通υ輝度信号はＦＭ変調され色信
号と混合され記録アンプ１８で増幅され記録される。つ
まシ第１図と同じ信号の流れとなる。First, to explain the case where the input signal is from a camera, a luminance signal on which DC is superimposed is output from the input terminal 33.
When the low frequency converted color signal comes in from 4, the input signal detection circuit 36 outputs the DC component and sends it to the switch 37dO.
The switch 38 of N, 38 is turned off. Therefore, the color signal passes through a level adjuster 1, and the luminance signal is FM-modulated, mixed with the color signal, amplified by the recording amplifier 18, and recorded. The signal flow is the same as in Figure 1.
次に入力信号が２イン入力端子３５から入もる場合、つ
まり入力信号がカラー映倫信号の場合、直流が重畳され
てｂないことを入力信号検出回路３，６で検出しスイッ
チ３７をＯＦＦ、スイッチ３８をＯＮする。よってライ
ン入力から入すつ九カラー映像信号はＡＧＯｌ ４で一
定のレベルにされり、Ｐ、Ｆ、３９、Ｂ、Ｐ、 Ｆ、
４０ Ｋ導かれる。輝度信号はり、Ｐ、Ｆ、３９により
分離され前述と同様ＫＰＭＦＭ変調る０急信号はＢ、Ｐ
、Ｆ、４０により分離され、ＡＯＯ回路４１でレベルを
一定忙される。この色信号は高域の副搬送波で変調され
ているのでこれを周波数変換信号発生回路４３で作られ
た信号とで４２で周波数変換され、４４のり、Ｐ、 Ｆ
、 ４４で低域側をとシだしカメラ出力の色信号と同じ
低域変換色信号とされＦＭ変調された輝度信号と混合さ
れる。さらに混合された信号は記録アンプで増幅されヘ
ッドにて記録される。再生時は入力信号がいずれの場合
も第１図にて説明したのと同様で端子３２よプカラー映
倫信号となシ出力される。Next, when an input signal enters from the 2-in input terminal 35, that is, when the input signal is a color video signal, the input signal detection circuits 3 and 6 detect that no DC is superimposed, and the switch 37 is turned OFF. Turn on the switch 38. Therefore, the nine color video signals input from the line input are kept at a constant level by AGOl 4, and are output as P, F, 39, B, P, F,
40 K led. The brightness signal beams are separated by P, F, and 39 and are KPMFM modulated as described above.
, F, 40, and the level is kept constant by the AOO circuit 41. Since this color signal is modulated with a high-frequency subcarrier, it is frequency-converted at 42 with a signal generated by a frequency-conversion signal generation circuit 43, and then outputted at 44, P, F.
, 44, the low frequency side is extracted and converted into a low frequency converted color signal, which is the same as the color signal of the camera output, and is mixed with the FM modulated luminance signal. Further, the mixed signal is amplified by a recording amplifier and recorded by a head. During playback, the input signal is outputted as a color video signal from the terminal 32 in the same manner as described with reference to FIG. 1 in any case.
以上述べ九如く本発明は色差信号を直接、低域変換搬送
波で直角二相変調を行い、輝度信号と色信号を別々に伝
送するため歪も少なく、小屋を可能ならしめることがで
きる。また本発明は、特にカメラとＶＴＲの記録系を一
体とし九記鍮専用機と再生専用機というシステム構成を
とる場合、特に効果があり、記録専用機内には従来の色
信号処理系のほとんどを省くヒとができ、画質劣化の少
ない小屋ビデオシステムを構成することができる。As described above, the present invention directly performs quadrature two-phase modulation on the color difference signal using a low-frequency conversion carrier wave, and transmits the luminance signal and color signal separately, so that distortion is small and it is possible to use a hut. Furthermore, the present invention is particularly effective when the recording systems of a camera and a VTR are integrated into a system configuration consisting of a machine exclusively for recording and a machine exclusively for playback. Therefore, it is possible to configure a shed video system with less deterioration in image quality.
第１図は本発明による一実施例を説明するブロック図、
第２図は本発明による他の実施例を説明するブロック図
である。
１１−・・位相シフト回路
１２・・・９０シフト回路FIG. 1 is a block diagram illustrating an embodiment of the present invention;
FIG. 2 is a block diagram illustrating another embodiment of the present invention. 11-...Phase shift circuit 12...90 shift circuit
Claims (2)
た低域変換色信号とＦＭ変調され九輝度信号を混合して
記録する事を特徴としたビデオシステム。(1) A video system characterized by recording a mixture of a low frequency conversion color signal obtained by quadrature two-phase modulation of a color difference signal using a low frequency conversion carrier wave and a nine luminance signal subjected to FM modulation.
色信号のクーストーク除去のため低域変換搬送波の位相
を移相させる位相シフト回路を用けたことをＩ！＃徴と
する特許請求の範囲ＩＥＩ項記載のビデオシステム。(2) When quadrature two-phase modulating a color difference signal with a low frequency conversion carrier wave, a phase shift circuit that shifts the phase of the low frequency conversion carrier wave is used to remove coostalk from the color signal. A video system according to claim IEI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56137161A JPS5839190A (en) | 1981-08-31 | 1981-08-31 | Video system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56137161A JPS5839190A (en) | 1981-08-31 | 1981-08-31 | Video system |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62093842A Division JPS6340495A (en) | 1987-04-15 | 1987-04-15 | Video system |
| JP9384187A Division JPS6354893A (en) | 1987-04-15 | 1987-04-15 | Video system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5839190A true JPS5839190A (en) | 1983-03-07 |
Family
ID=15192240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56137161A Pending JPS5839190A (en) | 1981-08-31 | 1981-08-31 | Video system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5839190A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6286996A (en) * | 1985-10-14 | 1987-04-21 | Hitachi Ltd | Magnetic recording and reproducing device |
| JPS6356888U (en) * | 1986-10-02 | 1988-04-15 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636290A (en) * | 1979-09-03 | 1981-04-09 | Matsushita Electric Ind Co Ltd | Recording and reproducing device with image pickup function |
-
1981
- 1981-08-31 JP JP56137161A patent/JPS5839190A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636290A (en) * | 1979-09-03 | 1981-04-09 | Matsushita Electric Ind Co Ltd | Recording and reproducing device with image pickup function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6286996A (en) * | 1985-10-14 | 1987-04-21 | Hitachi Ltd | Magnetic recording and reproducing device |
| JPS6356888U (en) * | 1986-10-02 | 1988-04-15 |
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