JPS59167188A - Video recorder - Google Patents
Video recorderInfo
- Publication number
- JPS59167188A JPS59167188A JP58041256A JP4125683A JPS59167188A JP S59167188 A JPS59167188 A JP S59167188A JP 58041256 A JP58041256 A JP 58041256A JP 4125683 A JP4125683 A JP 4125683A JP S59167188 A JPS59167188 A JP S59167188A
- Authority
- JP
- Japan
- Prior art keywords
- video
- signal
- synchronizing signal
- component
- recording
- 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
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
Description
【発明の詳細な説明】
この発明はＶＴＲ等の映像記録装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video recording device such as a VTR.
従来の映像記録装置の一例として、第１図にＶＴＲの構
成を示す。図において、（ロ）はビデオ信号（１）を信
号処理しビデオヘッド（７）に供給する録画信号処理回
路で、これは映像増幅器（４）、ＦＭ変調器（５）、記
録増幅器（６）から構成されている。また（２００）は
ビデオヘッド（７）によりテープ（８）から取り出され
た再生信号を信号処理し映像出力０３を得る再生信号処
理回路で、これは再生増幅器（９）、ＩＪミッタα０゜
ＦＭ復調器ａカ、映像増幅器（６）からなる。As an example of a conventional video recording device, FIG. 1 shows the configuration of a VTR. In the figure, (b) is a recording signal processing circuit that processes the video signal (1) and supplies it to the video head (7), which includes a video amplifier (4), an FM modulator (5), and a recording amplifier (6). It consists of Further, (200) is a reproduction signal processing circuit which processes the reproduction signal taken out from the tape (8) by the video head (7) and obtains the video output 03. It consists of a video amplifier (6).
次に動作について説明する。Next, the operation will be explained.
映像記録時、入力されたビデオ信号（１）は録画信号処
理回路（９）により映像増幅、ＦＭ変調、記録増幅され
てビデオヘッド（７）に供給され、テープ（８）上に記
録される。一方再生時、ビデオヘッド（７）で取出した
信号は再生信号処理回路（２００）により再生増幅、リ
ミテイング、ＦＭ／（ｉ［調、映像増幅され、映像出力
α１が得られる。During video recording, an input video signal (1) is subjected to video amplification, FM modulation, and recording amplification by a recording signal processing circuit (9), and is supplied to a video head (7) and recorded on a tape (8). On the other hand, during playback, the signal taken out by the video head (7) is subjected to playback amplification, limiting, FM/(i[key, video amplification) by the playback signal processing circuit (200), and a video output α1 is obtained.
一般にビデオ信号は、映像の情報を含む映像信号部分と
受信装置（テレビジョン）において映像信号を復調する
ために必要な情報を含む同期信号部分とから構成されて
いるために、上記従来装置の構成では、映像情報を含ま
ないビデオ信号（これは真黒な画面に相当する）を記録
することは不可能であった。従って例えばある画面と他
の画面との間に何もない画面、すなわち真黒な画面を挿
入して記録することができず、画面は連続的にしか記録
できないという欠点があった。また、テープ上に無録画
部があると、これが再生の際にノイズとなって復調され
、受信機画面上では白黒のまだら模様が現われ、見苦し
いという欠点があった。Generally, a video signal is composed of a video signal part containing video information and a synchronization signal part containing information necessary for demodulating the video signal in a receiving device (television). With this, it was impossible to record a video signal that did not include image information (this corresponded to a completely black screen). Therefore, for example, a blank screen, that is, a completely black screen, cannot be inserted and recorded between one screen and another, and screens can only be recorded continuously. Furthermore, if there is an unrecorded portion on the tape, this will be demodulated as noise during playback, resulting in a black and white mottled pattern appearing on the receiver screen, which is unsightly.
本発明は上記のような従来のものの欠点を除去するため
になされたもので、従来装置に、映像信号のうち同期信
号成分のみを任意の時間録画できるための装置を加える
ことにより、不要な画面のかわりに真黒の画面を録画で
き、再生時に不要な画面やノイズが現われるのを防ぐこ
とのできる映像記録装置を提供することを目的としてい
る。The present invention was made in order to eliminate the drawbacks of the conventional devices as described above, and by adding a device to the conventional device for recording only the synchronized signal component of the video signal for an arbitrary period of time, unnecessary screen The purpose of the present invention is to provide a video recording device that can record a completely black screen instead, and can prevent unnecessary screens and noise from appearing during playback.
以下、この発明の一実施例を図について説明する。An embodiment of the present invention will be described below with reference to the drawings.
第２図は本発明の一実施例による映像記録装置を示し、
特に本実施例で新たに付加されたものを図示している。FIG. 2 shows a video recording device according to an embodiment of the present invention,
In particular, what is newly added in this embodiment is illustrated.
本実施例装置では、映像増幅器（４）の前に切換器（３
）を置き、同期信号発生器（２）からの信号とビデオ信
号（１）とをこの切換器（３）に入力して器（４）に入
力する様にしている。In this embodiment, the switch (3) is installed before the video amplifier (4).
), and the signal from the synchronizing signal generator (2) and the video signal (1) are input to this switch (3) and then input to the switch (4).
次に動作を第４図を参照して説明する。ここで第４図（
ａ）は映像成分Ｖおよび同期信号Ｓを含むビデオ信号を
、同図（ｂ）は同期信号Ｓを示す。Next, the operation will be explained with reference to FIG. Here, Figure 4 (
3A shows a video signal including a video component V and a synchronization signal S, and FIG. 1B shows a synchronization signal S. FIG.
録画の際に、例えば希望の映像の録画が終了した時に、
スイッチの操作で映像増幅器（４）への入力を第４図（
ａ）に示されるようなビデオ信号（１）から第４図（ｂ
）に示されるような同期信号発生器（２）からの同期信
号へ切換える。この操作を行うことにより記録された映
像を再生すると、必要な映像と映像との間には黒画面が
再生され、不要な映像及びノイズを再生することがなく
なる。When recording, for example, when the recording of the desired video is finished,
The input to the video amplifier (4) is controlled by operating the switch as shown in Figure 4 (
From the video signal (1) as shown in Fig. 4(b)
) Switch to the synchronization signal from the synchronization signal generator (2) as shown in FIG. When a video recorded by performing this operation is played back, a black screen is played between the necessary videos, and unnecessary videos and noise are not played back.
次に第３図は本発明の他の実施例を示し、これは第２図
の同期信号発生器（２）の代わりに、ビデオ信号（１）
のうちの映像成分のみを除去することによって同期信号
を出力する映像成分除去装置α葎を用いたものである。FIG. 3 then shows another embodiment of the invention, in which the synchronization signal generator (2) of FIG. 2 is replaced by a video signal (1).
This uses a video component removal device α that outputs a synchronizing signal by removing only the video component.
本実施例においても上記実施例と同等の効果を得ること
ができる。In this embodiment as well, effects similar to those of the above embodiment can be obtained.
以上のように、本発明によれば、映像信号のうち同期信
号成分のみを任意の時間録画できるよう、同期信号発生
器と、ビデオ信号と該発生器からの同期信号とを切換え
る切換器とを設けたので、不要な画面のかわりに真黒の
画面を録画でき、再生時に不要な画面やノイズが現われ
ることがなくなる効果がある。As described above, according to the present invention, a synchronization signal generator and a switch for switching between the video signal and the synchronization signal from the generator are provided so that only the synchronization signal component of the video signal can be recorded for an arbitrary period of time. Because of this, it is possible to record a pitch black screen instead of an unnecessary screen, which has the effect of eliminating unnecessary screens and noise from appearing during playback.
第１図は従来の映像記録装置を示すブロック図、第２図
および第３図は本発明の一実施例および他の実施例によ
る映像記録装置のうち、特に各々の実施例で付加された
ものを示すブロック図、第４図は通常のビデオ信号およ
び同期信号を示す図である。
（２）・・・同期信号発生器、０３・・・映像成分除去
装置（同期信号発生器） 、（３）・・・切換器、（２
）・・・録画信号処理回路、（７）・・・ビデオヘッド
。
なお図中同一符号は同−又は相当部分を示す。・代理人
葛 野 信 −
第１図
２
第３図
第４図FIG. 1 is a block diagram showing a conventional video recording device, and FIGS. 2 and 3 are video recording devices according to one embodiment and other embodiments of the present invention, particularly those added in each embodiment. FIG. 4 is a block diagram showing normal video signals and synchronization signals. (2)...Synchronization signal generator, 03...Video component removal device (synchronization signal generator), (3)...Switcher, (2
)...recording signal processing circuit, (7)...video head. Note that the same reference numerals in the figures indicate the same or equivalent parts.・Agent Shin Kuzuno - Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
発生する同期信号発生器と、ビデオ信号と上記同期信号
発生器で発生された同期信号とを外部入力に応して切換
出力する切換器と、該切換器の出力を信号処理しビデオ
ヘッドに供給する録画信号処理回路とを備えたことを特
徴とする映像記録装置。(1) In a video recording device, a synchronization signal generator that generates a synchronization signal for a video signal, and a switch that switches and outputs the video signal and the synchronization signal generated by the synchronization signal generator according to an external input. , and a recording signal processing circuit that processes the output of the switch and supplies the signal to a video head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58041256A JPS59167188A (en) | 1983-03-11 | 1983-03-11 | Video recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58041256A JPS59167188A (en) | 1983-03-11 | 1983-03-11 | Video recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59167188A true JPS59167188A (en) | 1984-09-20 |
Family
ID=12603352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58041256A Pending JPS59167188A (en) | 1983-03-11 | 1983-03-11 | Video recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59167188A (en) |
-
1983
- 1983-03-11 JP JP58041256A patent/JPS59167188A/en active Pending
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