JPS6052187A - Recording and reproducing system of video signal - Google Patents
Recording and reproducing system of video signalInfo
- Publication number
- JPS6052187A JPS6052187A JP58158967A JP15896783A JPS6052187A JP S6052187 A JPS6052187 A JP S6052187A JP 58158967 A JP58158967 A JP 58158967A JP 15896783 A JP15896783 A JP 15896783A JP S6052187 A JPS6052187 A JP S6052187A
- Authority
- JP
- Japan
- Prior art keywords
- color difference
- signal
- carrier
- video signal
- difference signal
- 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
Abstract
Description
【発明の詳細な説明】
本発明は映像信号の記録・再生方式に関し、特に線順次
方式による映像信号の記録・再生の際に用いて有用なも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video signal recording and reproducing method, and is particularly useful for recording and reproducing video signals using a line sequential method.
フランス等では５ＥＣＡＩＶ１方式と呼称されるテレヒ
ション方式が標準化されている。このＳＥＣＡＭ方式で
は２つの色差信号Ｂ−Ｙ 、Ｒ−Ｙを走査線毎に交互に
切換え、夫々を異なった２つの副搬送波で周波数変調し
輝度信号に重畳して搬送映像信号を形成している。そこ
で、前記搬送映像信号の復調系においては、１水平走査
期間遅延させた信号とそうでない信号とを並列に取シ出
すことによシ１水平走査期間毎に間引かれた色差信号Ｒ
−Ｙ 、 Ｂ −Ｙを１水平走査期間前の色差信号Ｒ−
Ｙ、Ｂ−Ｙによシ補充して２つの連続した色差信号Ｒ−
Ｙ、Ｂ−Ｙを得ている。In France and other countries, a telephony system called the 5ECAIV1 system has been standardized. In this SECAM system, two color difference signals B-Y and R-Y are alternately switched for each scanning line, each frequency modulated using two different subcarriers, and superimposed on a luminance signal to form a carrier video signal. . Therefore, in the demodulation system of the carrier video signal, by extracting in parallel a signal delayed by one horizontal scanning period and a signal delayed by one horizontal scanning period, the color difference signal R thinned out every horizontal scanning period is
-Y, B -Y is the color difference signal R- one horizontal scanning period ago
Two consecutive color difference signals R- are supplemented by Y and B-Y.
I have obtained Y and B-Y.
このため復調系にはｌ水平走査期間遅延された信号とそ
うでない信号とを交互に取シ出すだめのスイッチが設け
られている。このように２種類の色差信号を並列に取シ
出すことを同時化と称し、このためのスイッチを同時化
スイッチと称す。For this reason, the demodulation system is provided with a switch for alternately extracting a signal delayed by one horizontal scanning period and a signal not delayed. Taking out two types of color difference signals in parallel in this way is called synchronization, and a switch for this purpose is called a synchronization switch.
ＳＥＣＡＭ方式における前記同時化スイッチは次の様に
して、即ち２つの色差信号Ｒ−Ｙ、Ｂ−Ｙから線順次信
号を得る際１水平走査期間毎の搬送波の周波数を違えて
おき、復調系ではその差に基づいて色差信号Ｒ−Ｙ 、
Ｂ−Ｙの何れであるかを表わす信号によシ切シ換えてい
る。このような色差信号の判別法を利用しテレビジョン
信号等の映像信号を磁気記録再生しようとする場合色差
信号Ｒ−Ｙ 、 Ｂ −Ｙで変調する搬送信号に使える
周波数帯域線予め決められておシ搬送波同志の周波数偏
差も制限されるため、同時化スイッチの切換えのための
回路構成が複雑になるという欠点がある。The synchronization switch in the SECAM system is configured as follows: When obtaining a line sequential signal from the two color difference signals R-Y and B-Y, the frequency of the carrier wave is changed for each horizontal scanning period, and in the demodulation system, the frequency of the carrier wave is different. Based on the difference, the color difference signal RY,
It is switched by a signal indicating either B or Y. When attempting to magnetically record and reproduce a video signal such as a television signal using such a color difference signal discrimination method, a predetermined frequency band line that can be used for a carrier signal modulated by the color difference signals R-Y and B-Y is used. Since the frequency deviation between the carrier waves is also limited, there is a drawback that the circuit configuration for switching the synchronization switch becomes complicated.
本発明は、上記従来技術の欠点に鑑み、線順次方式によ
る映像信号の再生に際し、簡単な構成の回路で確実に２
種類の色差信号を同時化し得るようにした映像信号の記
録・再生方式を提供することを目的とする。かかる目的
を達成する本発明は、映像信号の記録時には２種類の色
差信号の一方に、これを識別する判別パルスを１水平走
査期間毎に付加する一方、映像信号の再生時には前記判
別パルスを抜き出し、この判別パルスに基づき、若しく
はこの判別パルスの検出を条件として１水平期間毎に同
時化スイッチを切換えるようにした点をその技術思想の
基礎とするものである。In view of the above-mentioned drawbacks of the prior art, the present invention provides reliable two-way processing using a circuit with a simple configuration when reproducing video signals using the line-sequential method.
It is an object of the present invention to provide a video signal recording/reproducing method that allows different types of color difference signals to be synchronized. The present invention achieves this object by adding a discrimination pulse to identify one of two types of color difference signals every horizontal scanning period when recording a video signal, and extracting the discrimination pulse when reproducing the video signal. The technical idea is based on the fact that the synchronization switch is switched every horizontal period based on this discrimination pulse or with the detection of this discrimination pulse as a condition.
以下本発明の実施例を図面に基づき詳細に説明する。Embodiments of the present invention will be described in detail below based on the drawings.
第１図（ａ）は本発明の実施例に係る記録方式を実現す
る装置を示すブロック線図である。同図に示すように、
入力端子１には映像信号の輝度信号Ｙが、入力端子２に
は映像信号の一方の色差信号Ｒ−Ｙが、入力端子３には
映像信号の他方の色差信号Ｂ−Ｙが、入力端子４には判
別パルス６が、入力端子５にはラインパルス７が夫々供
給される。このうち判別パルス６は１水平走査期間（以
下ＩＨと略称する）毎に短時間立上るパルスである。ま
たラインパルス７は、例えばＩＨの始端と終端で立上る
水平駆動信号等によシ形成されＩＨ毎に立上ｐと立下シ
とを繰シ返すパルスである。このラインパルス７の波形
を第２図（ｅ）に示す。加算器８は色差信号Ｂ−Ｙに判
別パルス６を付加する回路である。したがって色差信号
Ｒ−Ｙが、例えば第２図（ａ）に示すように、色差信号
Ｒ−Ｙのみからなる信号であるのに対し、加算器８の出
力信号となる色差信号Ｂ −Ｙ、は、例えば第２図（ｂ
、ｌに示すように、色゛差信号Ｂ−Ｙに判別パルス６が
付加された信号となる。線順次化スイッチ９はラインパ
ルス７によ、９１Ｈ毎に切換えられ色差信号Ｒ−Ｙ、Ｂ
−Ｙ。FIG. 1(a) is a block diagram showing an apparatus for realizing a recording method according to an embodiment of the present invention. As shown in the figure,
The input terminal 1 receives the luminance signal Y of the video signal, the input terminal 2 receives the color difference signal RY of one of the video signals, the input terminal 3 receives the color difference signal B-Y of the other video signal, and the input terminal 4 receives the color difference signal Y of the video signal. A discrimination pulse 6 is supplied to the input terminal 5, and a line pulse 7 is supplied to the input terminal 5, respectively. Among these, the discrimination pulse 6 is a pulse that rises for a short time every horizontal scanning period (hereinafter abbreviated as IH). The line pulse 7 is a pulse that is formed by, for example, a horizontal drive signal that rises at the start and end of an IH, and repeats a rising p and a falling p for each IH. The waveform of this line pulse 7 is shown in FIG. 2(e). The adder 8 is a circuit that adds the discrimination pulse 6 to the color difference signal B-Y. Therefore, while the color difference signal R-Y is a signal consisting only of the color difference signal R-Y, as shown in FIG. 2(a), the color difference signal B-Y, which is the output signal of the adder 8, is , for example, in Figure 2 (b
, l, the discrimination pulse 6 is added to the color difference signal B-Y. The line sequential switch 9 is switched every 91H by the line pulse 7 to output color difference signals R-Y, B.
-Y.
をＩＨ毎に選択的に出力して線順次化するものである。is selectively output for each IH and line-sequentialized.
この線順次化した色差信号１０の波形を第２図（ｄ）に
示す。同図に示すように、色差信号１０は色差信号Ｒ−
Ｙ 、Ｂ−ｙｌが交互に繰）返す連続した信号となって
いる。この色差信号１０はＦＭ変調器１１でＦＭ変調し
て搬送色差信号とな）、同様にＦＭ変調器１２で輝度信
号ＹでＦＭ変調して得る搬送輝度信号と混合器１３によ
シ多重化される。このようにして形成された搬送映像信
号１４は記録アンプ１５を介して記録ヘッド１６によシ
磁気記録媒体、例えば磁気ディスク（図示せず）に記録
されている。The waveform of this line-sequential color difference signal 10 is shown in FIG. 2(d). As shown in the figure, the color difference signal 10 is the color difference signal R-
It is a continuous signal in which Y and B-yl are repeated alternately. This color difference signal 10 is FM modulated by an FM modulator 11 to become a carrier color difference signal), and is multiplexed by a mixer 13 with a carrier luminance signal obtained by FM modulating the luminance signal Y by an FM modulator 12. Ru. The carrier video signal 14 thus formed is recorded by a recording head 16 via a recording amplifier 15 on a magnetic recording medium, for example, a magnetic disk (not shown).
第１図Φ）は本発明の実施例に係る再生方式を実現する
装置を示すブロック線図である。同図に示すように、再
生ヘッド１７は第１図（ａ）に示す記録装置により磁気
記録媒体に記録された前記搬送映像信号１４を再生する
もの、である。このようにしそ再生された搬送映像信号
１４はヘッドアンプ１８を介してバイパスフィルタ１９
“及びローパスフィルタ２０に供給される。バイパスフ
ィルタ１９では搬送映像信号１４よシ搬送輝度信号が損
出されてＦＭ復調器２１に供給される。この結果ＦＭ復
調器２１の出力信号として輝度信号Ｙを得る。一方、ロ
ーパスフィルタ２０では搬送映像信号１４よシ搬送色差
信号が抽出され′ｒＦＭ７．Ｊ調器２２に供給される。FIG. 1 Φ) is a block diagram showing an apparatus for realizing a reproduction method according to an embodiment of the present invention. As shown in the figure, the reproducing head 17 is for reproducing the conveyed video signal 14 recorded on the magnetic recording medium by the recording device shown in FIG. 1(a). The carrier video signal 14 thus reproduced is passed through a head amplifier 18 to a bypass filter 19.
In the bypass filter 19, the carrier video signal 14 and the carrier luminance signal are lost and supplied to the FM demodulator 21.As a result, the luminance signal Y is output as the output signal of the FM demodulator 21. On the other hand, the low-pass filter 20 extracts the carrier color difference signal from the carrier video signal 14 and supplies it to the 'rFM7.J modulator 22.
こ′の結果Ｆ−ＭＩＮ調器２２の出力信号として線順次
化した色差信号１０を得る。この色差信号１０はＩＨ前
に復調され遅延回路２３によシ同期間遅延させた他の色
差信号１０と同時に同時化スイッチ２４に供給される。As a result, a line-sequential color difference signal 10 is obtained as an output signal of the F-MIN adjuster 22. This color difference signal 10 is demodulated before IH and is supplied to the synchronization switch 24 at the same time as the other color difference signal 10 which is delayed by a delay circuit 23 for the same period.
即ち、第２図（ｄ）に示すような色差信号１０と、第２
図（ｅ）に示すよりなＩＨ遅延せしめた色差信号１０と
が同時に同時化スイッチ２４に供給される。同時化スイ
ッチ２４は、遅延回路２３に接続されている。接点２４
ｃとＦＭ４ν調器２２に直接接続されている接点２４ｄ
と゛を選択的に切り換えるスイッチ２４ａ及び同様の接
点２４ｅ 、２４ｆを選択的に切シ換えるスイッチ２４
ｂ′ｆｔ有している。このうち接点２４ｃ、’２４ｆ及
び接点２４ｄ 、２４ｅは同時に選択される。したがっ
てスイッチ２４ａで色差信号Ｒ−Ｙを選択する場合には
スイッチ２４ｂで色差信号Ｂ −Ｙ、が選択される。即
ち、現時点で復調され、ている信号が色差信号Ｂ −Ｙ
。That is, the color difference signal 10 as shown in FIG. 2(d) and the second
The IH-delayed color difference signal 10 shown in FIG. 3(e) is simultaneously supplied to the synchronization switch 24. The simultaneous switch 24 is connected to the delay circuit 23. Contact 24
c and a contact 24d directly connected to the FM4ν adjuster 22.
A switch 24a for selectively switching between and 24a and a switch 24 for selectively switching between similar contacts 24e and 24f.
It has b'ft. Among these, the contacts 24c and 24f and the contacts 24d and 24e are selected at the same time. Therefore, when the switch 24a selects the color difference signal RY, the switch 24b selects the color difference signal B-Y. That is, the signal demodulated at this moment is the color difference signal B - Y
.
であるとするとこの色差信号Ｂ −Ｙ、がスイッチｚ４
ｂｍよシ選択されるとともに、ＩＨ前の色差信号ｔ＜
−ｙがスイッチ２４ａによシ同時に選、択され、ＩＨ後
にはその時点の色差信号Ｒ−Ｙ及びＩＨ前の色差信号Ｂ
”−Ｙｒがスイッチ２４ａ。, this color difference signal B −Y is the switch z4
bm is selected, and the color difference signal t< before IH is selected.
-y are simultaneously selected by the switch 24a, and after IH, the color difference signal RY at that time and the color difference signal B before IH
”-Yr is the switch 24a.
２４ｂによシ夫々同時に蓮択される。かくて記録装置の
線順次化スイッチ９によ５１Ｈ毎に閾引かれた色差信号
Ｒ−Ｙ、Ｂ−Ｙ、は遅延回路２３によシ遅延されたＩＨ
前の色差信号Ｒ−Ｙ、Ｂ−Ｙ。24b, each lotus is selected at the same time. In this way, the color difference signals R-Y, B-Y, which are thresholded every 51H by the line sequential switch 9 of the recording device, are delayed by the delay circuit 23 to become IH.
Previous color difference signals R-Y, B-Y.
によシ補充され夫々連続した２種類の並列した信号とな
る。このようにして同時化された色差信号Ｒ−Ｙ 、
Ｂ −Ｙ、は帰線期間波形整形回路２５゜２６及びＮＴ
ＳＣエンコーダ２７を介して混合器２８に至り、この混
合器２８で輝度信号Ｙと合成されて元の映像信号となシ
、この映像信号が出力端子２９′を介して出力される。The two types of parallel signals are then supplemented by each other and are continuous. The color difference signal RY synchronized in this way,
B - Y, blanking period waveform shaping circuit 25, 26 and NT
It reaches a mixer 28 via the SC encoder 27, where it is combined with the luminance signal Y to form the original video signal, and this video signal is outputted via the output terminal 29'.
このとき帰線期間波形整形回路２５．２６は、ＩＨ毎に
ブランキング期間内に挿入されている判別パルス６を除
去し原色差信号波形に戻す波形整形を行なう回路である
。まｆｃＮＴＳＣエンコーダ２７は色差信号Ｒ−Ｙ、Ｂ
−Ｙ夫々カラー副搬送波（３，５８ＭＨ７）で変調しＮ
ＴＳＣカラー信号を作るものである。At this time, the blanking period waveform shaping circuits 25 and 26 are circuits that remove the discrimination pulse 6 inserted in the blanking period for each IH and perform waveform shaping to return to the primary color difference signal waveform. The fcNTSC encoder 27 outputs color difference signals R-Y, B.
-Y modulated with color subcarrier (3,58MH7) respectively
This is used to create TSC color signals.
かかる再生装置において肝要なことは線順次化された色
差信号Ｒ−Ｙ 、 Ｂ −Ｙ、を正確に同時化すること
である。即ち、色差信号Ｒ−Ｙ、Ｂ−Ｙ。What is important in such a reproducing apparatus is to accurately synchronize the line-sequential color difference signals R-Y and B-Y. That is, the color difference signals R-Y, B-Y.
の選択を取り違えることな（ＬＨ毎に切シ換えなければ
ならない。これは同時化スイッチ２４の切シ換えを正確
に行なうことによシ達成される。本実施例ではフリツプ
フロツプ回路３０のＱ出力によシ同時化スイッチ２４を
切シ換えている。更に評言すると、ゲート回路３１には
遅延回路２３でＩＨだけ遅延された色差信号１０と同時
に判別信号抜き取りパルス３３が、またゲート回路３２
にはＦＭ復調器２２で復調された色差信号１０と同時に
判別信号抜き取シパルス３３が夫々供給されている。こ
の判別信号抜き取９パルス３３は判別パルス６が付加さ
れている位置の近傍でこの判別パルス６をカバーするよ
うにＩＨ同周期立上るパルスである。また、ゲート回路
３’ｌ 、 ３２はＡＮＩ）ゲートである。したがって
ＩＨ遅延された色差信号１０のうち色差信号Ｂ −Ｙ、
から２Ｈ毎に判別パルス６ａが抜き出される。また、遅
延回路２３を通ることなく直接ゲート３２に供給される
色差信号１０のうちの色差信号Ｂ −Ｙ、からも２Ｈ毎
に判別・くルス６ｂが抜き出される。したがって判別パ
ルス６ａ 、６ｂ間にはＩＨの位相差が存在する。第２
図（ｆ）は判別パルス６ａを、第２図（ｇ）は判別ノく
ルス６ｂを夫々示す波形図である。フリップフロップ回
路３０は、判別パルス６ａをセットトリガパルスとする
とともに判別パルス６ｂをリセットトリガパルスとする
ものである。したがって、クリップフロップ回路３０の
９出力信号３４は、第２図（ｈ）に示すように、判別パ
ルス６ａの立上シで立上シ、判別パルス６ｂの立上りで
立下るパルスとなる。このＱ出力信号３４で同時化スイ
ッチ２４は１！（毎に切り換えられる。This is accomplished by accurately switching the synchronization switch 24. In this embodiment, the Q output of the flip-flop circuit 30 is Furthermore, the gate circuit 31 receives the discrimination signal extracting pulse 33 at the same time as the color difference signal 10 delayed by IH in the delay circuit 23, and the gate circuit 32
At the same time as the color difference signal 10 demodulated by the FM demodulator 22, a discrimination signal sampling pulse 33 is supplied to the FM demodulator 22, respectively. This discrimination signal extraction 9 pulse 33 is a pulse that rises at the same period as the IH so as to cover the discrimination pulse 6 in the vicinity of the position where the discrimination pulse 6 is added. Further, the gate circuits 3'l and 32 are ANI) gates. Therefore, among the IH-delayed color difference signals 10, the color difference signals B −Y,
The discrimination pulse 6a is extracted every 2H from . Furthermore, the discrimination/curse 6b is extracted every 2H from the color difference signal B-Y of the color difference signal 10 that is directly supplied to the gate 32 without passing through the delay circuit 23. Therefore, there is an IH phase difference between the discrimination pulses 6a and 6b. Second
FIG. 2(f) is a waveform diagram showing the discrimination pulse 6a, and FIG. 2(g) is a waveform diagram showing the discrimination pulse 6b. The flip-flop circuit 30 uses the discrimination pulse 6a as a set trigger pulse and the discrimination pulse 6b as a reset trigger pulse. Therefore, the output signal 34 of the clip-flop circuit 30 becomes a pulse that rises at the rising edge of the discrimination pulse 6a and falls at the rising edge of the discrimination pulse 6b, as shown in FIG. 2(h). With this Q output signal 34, the simultaneous switch 24 is set to 1! (It can be switched every time.
第３図は本発明の他の実施例に係る再生装置を示すブロ
ック線図である。この再生装置は同時化スイッチ２４０
制御系を変えたもので他の構成は第１図（ｂ）に示す再
生装置と同一であるため同一部分には同一番号を付し重
複する説明は省略する。第３図に示すように、クリップ
フロップ回路３５は、リセット端子ｌ＜にパルスが供給
されてリセットされていることを条件としてクロック端
子Ｃにパルスが供給される毎にＱ出力端子から送出され
るＱ出力信号３７の状態が変化するものである。このフ
リップフロップ回路３５のクロック端子Ｃには、ＩＨの
始端と終端で立上る例えば水平駆動信号）１． Ｄ、が
供給され、またリセット端子Ｒにはゲート回路３６で抜
き出された判別パルス６ｂが供給される。このときゲー
ト回路３６にはＦＭ復調器２２で復調された色差信号１
０と同時に判別信号抜き取シパルス３３が供給されてお
シ、したがって前記色差信号１０の構成要素である色差
信号Ｈ−Ｙ。FIG. 3 is a block diagram showing a reproducing apparatus according to another embodiment of the present invention. This playback device uses the synchronization switch 240
Since the control system is changed and the other configurations are the same as the playback device shown in FIG. 1(b), the same parts are given the same numbers and redundant explanations will be omitted. As shown in FIG. 3, the clip-flop circuit 35 outputs a signal from the Q output terminal every time a pulse is supplied to the clock terminal C, provided that a pulse is supplied to the reset terminal l< and reset is performed. The state of the Q output signal 37 changes. The clock terminal C of this flip-flop circuit 35 receives, for example, a horizontal drive signal (1. D, is supplied, and the determination pulse 6b extracted by the gate circuit 36 is supplied to the reset terminal R. At this time, the gate circuit 36 receives the color difference signal 1 demodulated by the FM demodulator 22.
At the same time as 0, the discrimination signal extracting signal 33 is supplied, and thus the color difference signal HY, which is a component of the color difference signal 10.
から２Ｈ毎に判別パルス６ｂが抜き出される。The discrimination pulse 6b is extracted every 2H from .
第４因（ａ）〜第４図（ｅ）は順に水平駆動信号Ｈ，Ｄ
、、判別パルス６ｂ、フリツプンロフフ回に３５のＱ出
力信号３７の波形を示す図である。これらの図からも理
解される通シ、クリップフロップ回路３５のＱ出力信号
３７は判別パルス６ｂの立上シを条件として水平駆動信
号Ｈ，ＩＪ、の立上シ毎に状態が変化する。このＱ出力
佑゛号３７で同時化スイッチ２４はＩＨ毎に切シ換えら
れる。The fourth factor (a) to FIG. 4(e) are horizontal drive signals H and D in order.
, , is a diagram showing the waveform of the 35 Q output signals 37 at the time of the discrimination pulse 6b and the flip-flop. As can be understood from these figures, the state of the Q output signal 37 of the clip-flop circuit 35 changes every time the horizontal drive signals H, IJ rise on the condition that the discrimination pulse 6b rises. The simultaneous switch 24 is switched by this Q output signal 37 for each IH.
なお、上記実施例ではＮＴＳＣ方式の場合に関して説明
したが、これに限らず、例えばＰＡＬ方式であっても良
い。このときＮ ’ｆ’ Ｓ Ｃエンコーダ２７はＰＡ
Ｌエンコーダとなる。In addition, although the above embodiment has been described with respect to the case of the NTSC system, the present invention is not limited to this, and, for example, the PAL system may be used. At this time, N 'f' SC encoder 27 is PA
It becomes an L encoder.
以上実施例とともに具体的に説明したように本発明によ
れば、記録系では２種類の色差信号の一方に、これを識
別する判別パルスを１水平走査毎に付加する一方、再生
糸では前記判別パルスを抜き出し、この判別パルスに基
づキ、若しくはこの判別パルスの検出を条件としてクリ
ップフロップ回路の出力信号によシ１水平期間毎に同時
化スイッチを切シ換えるようにしたので、同時化のため
の回路構成が簡単になるばかシでなく、例えばバースト
ニジ−を生起した場合等でも復帰後には所定の順序で正
確に同時化スイッチを切シ換えることができる。As specifically explained above with the embodiments, according to the present invention, in the recording system, a discrimination pulse for identifying one of the two types of color difference signals is added every horizontal scan, while in the regenerated yarn, the discrimination pulse is added to one of the two types of color difference signals. The pulse is extracted and the synchronization switch is switched every horizontal period based on this discrimination pulse or the output signal of the clip-flop circuit with the detection of this discrimination pulse as a condition. In addition to simplifying the circuit configuration, the synchronization switch can be switched accurately in a predetermined order after recovery, even if a burst error occurs, for example.
第１図（りは本発明の実施例方式を実現する記録装置を
示すブロック線図、第１図（ｂ）はその再生装置を示す
ブロック線図、第２図（ａ）〜第２図（ｈ）は第１図（
ａ）及び第１図（ｂ）に示す装置の各部の波形を示す波
形図、第３図は他の実施例に係る再生装置を示すブロッ
ク線図、第４図（ａＪ〜第４図（Ｃ）はその各部の波形
を示す波形図である。
図面中、
６は判別パルス、
２３は遅延回路、
２４は同時化スイッチ、
３０．３５は７リツプフロツプ回路である。
特許出願人 富士写真フィルム株式会社代理人弁理士
光石士部（他１名）
ヘ ヘ ヘ ヘ
ｔｌ：＋８ ０ ℃FIG. 1 is a block diagram showing a recording device that implements an embodiment of the present invention, FIG. 1B is a block diagram showing a playback device thereof, and FIGS. h) is shown in Figure 1 (
a) and FIG. 1(b), FIG. 3 is a block diagram showing a playback device according to another embodiment, and FIGS. ) is a waveform diagram showing the waveform of each part. In the drawing, 6 is a discrimination pulse, 23 is a delay circuit, 24 is a synchronization switch, and 30.35 is a 7 lip-flop circuit. Patent applicant: Fuji Photo Film Co., Ltd. agent patent attorney
Shibu Mitsuishi (1 other person) He he he hetl: +8 0 ℃
Claims (3)
択して線順次化し、この線順次化した色差信号で搬送波
を変調して得た搬送色差信号と、輝度信号で他の搬送波
を変調して得た搬送輝度信号とを多重化して磁気記録媒
体に記録する映像信号の記録方式において、前記色差信
号の何れか一方に、これを識別する判別パルスを１水平
走査期間毎に付加したことを特徴とする映像信号の記録
・再生方式。(1) Two types of color difference signals are alternately selected every horizontal scanning period and made line sequential, and a carrier color difference signal obtained by modulating a carrier wave with this line sequential color difference signal and another carrier wave with a luminance signal. In a video signal recording method that multiplexes a carrier luminance signal obtained by modulating the color difference signal and records it on a magnetic recording medium, a discrimination pulse for identifying one of the color difference signals is added every horizontal scanning period to one of the color difference signals. A video signal recording/playback method characterized by the following.
る判別パルスを１水平走査期間毎に付加するとともに、
この２種類の色差信号を１水平走査期間毎に交互に選択
して線順次化し、この線順次化した色差信号で搬送波を
変調して得た搬送色差信号と、輝度信号で他の搬送波を
変調して得た搬送輝度信号とを多重化して磁気記録媒体
に記録し／こ搬送映像信号を再生する映像信号の再生方
式において、前記搬送映像信号を復調して得る色差信号
と、１水平走査期間前に復調され同期間遅延させた他の
色差信号とを同時に選択する同時化スイッチを有すると
ともに、前記搬送映像信号を復調して得る色差信号のう
ち判別パルスが付加された色差信号と、この色差信号を
１水平走査期間遅延させた色差信号とから抜き出した判
別パルスでフリップフロップ回路を交互にセット及びリ
セットし、このフリップフロップ回路の出力信号で１水
平走査期間毎に前記同時化スイッチを交互に切換えるよ
うにしたことを特徴とする映像信号の再生方式。(2) Adding a discrimination pulse to identify one of the two types of color difference signals every horizontal scanning period, and
These two types of color difference signals are alternately selected every horizontal scanning period and made line sequential, and the carrier color difference signal obtained by modulating a carrier wave with this line sequential color difference signal and the other carrier wave are modulated with the luminance signal. In a video signal reproduction method in which the carrier video signal is multiplexed and recorded on a magnetic recording medium and the carrier video signal is reproduced, a color difference signal obtained by demodulating the carrier video signal and a color difference signal obtained by demodulating the carrier video signal are recorded on a magnetic recording medium. It has a synchronization switch that simultaneously selects another color difference signal that was previously demodulated and delayed for the same period, and also includes a color difference signal to which a discrimination pulse has been added among the color difference signals obtained by demodulating the carrier video signal, and this color difference signal. A flip-flop circuit is alternately set and reset using discrimination pulses extracted from a color difference signal obtained by delaying the signal by one horizontal scanning period, and the synchronization switch is alternately set and reset every horizontal scanning period by the output signal of this flip-flop circuit. A video signal reproduction method characterized by switching.
る判別パルスを１水平走査期間毎に付加するとともに、
２種類の色差信号を１水平走査期間毎に交互に選択して
線順次化し、この線順次化した色差信号で搬送波を変調
して得た搬送色差信号と、輝度信号で他の搬送波を変調
して得た搬送輝度信号とを多重化して磁気記録媒体に記
録した搬送映像信号を再生する映像信号の再生方式にお
いて、前記搬送映像信号を復調して得る色差信号と、１
水平走査期間前に復調され同期間遅延させた他の・色差
信号とを同時に選択する同時化スイッチを有するととも
に、前記搬送映像信号を復調して得る色差信号から抜き
出した判別パルスをリセット入力とし水平駆動信号をク
ロックパルスとするフリップフロップ回路の出力信号で
１水平走査期間毎に前記同時化スイッチ、を交互に切換
えるようにしたことを特徴とする映像信号の再生方式。(3) Adding a discrimination pulse to identify one of the two types of color difference signals every horizontal scanning period, and
Two types of color difference signals are alternately selected every horizontal scanning period and made line sequential, and the carrier color difference signal obtained by modulating a carrier wave with this line sequential color difference signal and another carrier wave are modulated with a luminance signal. In a video signal reproduction method for reproducing a carrier video signal recorded on a magnetic recording medium by multiplexing a carrier luminance signal obtained by a carrier video signal, a color difference signal obtained by demodulating the carrier video signal;
It has a synchronization switch that simultaneously selects another color difference signal that was demodulated before the horizontal scanning period and delayed for the same period, and also uses a discrimination pulse extracted from the color difference signal obtained by demodulating the carrier video signal as a reset input to control the horizontal scanning. A video signal reproducing method characterized in that the synchronization switch is alternately switched every horizontal scanning period using an output signal of a flip-flop circuit whose drive signal is a clock pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58158967A JPS6052187A (en) | 1983-09-01 | 1983-09-01 | Recording and reproducing system of video signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58158967A JPS6052187A (en) | 1983-09-01 | 1983-09-01 | Recording and reproducing system of video signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6052187A true JPS6052187A (en) | 1985-03-25 |
Family
ID=15683278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58158967A Pending JPS6052187A (en) | 1983-09-01 | 1983-09-01 | Recording and reproducing system of video signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6052187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62222790A (en) * | 1986-03-25 | 1987-09-30 | Fuji Photo Optical Co Ltd | Recording and reproducing method for electronic camera |
-
1983
- 1983-09-01 JP JP58158967A patent/JPS6052187A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62222790A (en) * | 1986-03-25 | 1987-09-30 | Fuji Photo Optical Co Ltd | Recording and reproducing method for electronic camera |
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