JPS59101980A - Magnetic picture recording and reproducing device - Google Patents
Magnetic picture recording and reproducing deviceInfo
- Publication number
- JPS59101980A JPS59101980A JP57212416A JP21241682A JPS59101980A JP S59101980 A JPS59101980 A JP S59101980A JP 57212416 A JP57212416 A JP 57212416A JP 21241682 A JP21241682 A JP 21241682A JP S59101980 A JPS59101980 A JP S59101980A
- Authority
- JP
- Japan
- Prior art keywords
- processing circuit
- signal processing
- output
- recording
- playback
- 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
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
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…気録画再生装閂に閂し、特に、チューナの
ような受信回路が内蔵されたビデオテープレコーダのよ
うな磁気録画再生装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing device, and more particularly to a magnetic recording and reproducing device such as a video tape recorder having a built-in receiving circuit such as a tuner.
最近のビデオチープレコータはチューナが内蔵されてい
て、テレビジョン放送をチューナで受信して磁気テープ
に録画できるようになっている。Recent video recorders have built-in tuners that allow them to receive television broadcasts and record them on magnetic tape.
このようなビデオテープレコーダにおいて、再生時にチ
ューナを含む受信信号処理回路の出力信号をそのまま録
画再生信号処理回路に与えるように構成されたものと、
再生時のみ受信信号処理回路の電源をオフするように構
成したものとがある。In such a video tape recorder, one is configured so that the output signal of a reception signal processing circuit including a tuner is directly applied to a recording/playback signal processing circuit during playback;
Some devices are configured to turn off the power to the received signal processing circuit only during reproduction.
前者の場合、再生時において録画再生信号処理回路の入
力を受信信号処理回路出力から磁気ヘッド側に切換えら
れるが、受信信号処理回路にもｌ［ｌｌＩが供給されて
いるため、その出力信号が録画再生信号処理回路に混入
してしまい、妨害を与えてしまうという欠点がある。後
者の場合は、受信信号処理回路の電源をオフしているた
め、録画再生信号、処理回路に受信出力が混入して妨害
を与えることはないが、たとえば再生時から再生時以外
の録画時に切換わる際に、受信信号処理回路の出力信号
の立上がりが悪くなるという欠点があった。In the former case, during playback, the input of the recording/playback signal processing circuit is switched from the reception signal processing circuit output to the magnetic head side, but since l[llI is also supplied to the reception signal processing circuit, its output signal is not recorded. It has the disadvantage that it mixes into the reproduced signal processing circuit and causes interference. In the latter case, since the power to the received signal processing circuit is turned off, the received output will not mix with the recording/playback signal and the processing circuit and cause interference, but if, for example, the power is turned off during recording from the time of playback to the time of recording other than the time of playback, When switching, there is a drawback that the rise of the output signal of the received signal processing circuit becomes poor.
それゆえに、この発明の主たる目的は、再生時において
受信信号処理回路の出力が録画再生信号処理回路に妨害
を与えることなく、しかも再生時から再生時以外に切換
えた際の受信信号処理回路の立上がり不良を改善し得る
磁気録画再生装置を提供することである。Therefore, the main object of the present invention is to prevent the output of the received signal processing circuit from interfering with the recording and playback signal processing circuit during playback, and to prevent the output of the received signal processing circuit from interfering with the output of the received signal processing circuit when switching from playback to a mode other than playback. It is an object of the present invention to provide a magnetic recording and reproducing device that can improve defects.
この発明を要約すれば、受信回路の出力端に交流的に接
地されるスイッチ手段を接続し、再生時においてこのス
イッチ手段を閉じて受信回路出力に現われる高域成分を
録画再生回路に与えないように構成したものである。To summarize this invention, a switch means grounded in AC is connected to the output end of the receiving circuit, and during playback, this switch means is closed to prevent high-frequency components appearing in the output of the receiving circuit from being applied to the recording/playback circuit. It is composed of
この発明の上述の目的およびその他の目的と特徴は以下
に図面を参照して行なう詳細な説明から一層明らかとな
ろう。The above objects and other objects and features of the present invention will become more apparent from the detailed description given below with reference to the drawings.
図はこの発明の一実施例のｍｘブロック図である。受信
信号処理回路１は従来からよく知られているように、チ
ューナ１１と映像中間周波増幅器１２と映像信号検波増
幅器１３とを含んで４３成される。この受信信号処理回
路１の出力は録画再生信号処理回路２に接続される。こ
の録画再生信号処理回路２は受信信号処理回路１の出力
を受けて、図示しない磁気ヘッドによって磁気テープに
テレビジョン放送を録画したり、あるいは磁気ヘッドで
読取られた磁気テープからの録画内容を受けてモニタ３
に映像を映し出すものである。受信信号処理回路１の出
力端には、この発明の特徴となるスイッチ５の一端が接
続され、スイッチ５の他端はコンデンサ６を介して接地
される。すなわち、スイッチ５を閉じることによって受
信信号処理回路の出力端は交流的に接地され、受信信号
処理回路の出力信号に含まれる高域成分が減衰される。The figure is an mx block diagram of an embodiment of the present invention. As is well known in the art, the received signal processing circuit 1 is composed of 43 components including a tuner 11, a video intermediate frequency amplifier 12, and a video signal detection amplifier 13. The output of this received signal processing circuit 1 is connected to a recording/playback signal processing circuit 2. The recording/reproduction signal processing circuit 2 receives the output of the reception signal processing circuit 1 and records television broadcasting on a magnetic tape using a magnetic head (not shown), or receives recorded content from the magnetic tape read by the magnetic head. monitor 3
The image is displayed on the screen. One end of a switch 5, which is a feature of the present invention, is connected to the output end of the received signal processing circuit 1, and the other end of the switch 5 is grounded via a capacitor 6. That is, by closing the switch 5, the output end of the received signal processing circuit is grounded in an alternating current manner, and the high frequency components contained in the output signal of the received signal processing circuit are attenuated.
なお、スイッチ５はたとえばトランジスタなどのスイツ
チンーグ回路によって構成され、スイッチ切換出力４に
よって制御される。Note that the switch 5 is constituted by a switching circuit such as a transistor, and is controlled by the switch switching output 4.
以上のように、この発明によれば、受信信号処理回路の
出力端に、閉じることによって交流的に接地されるスイ
ッチ手段を設けたので、再生時にスイッチ手段を閉じる
ことによって受信信号処理回路の出力に含まれる高域成
分が録画信号処理回路に与えられなくなり、受信信号処
理回路の出力が妨害を与えるのを防止できる。また、再
生時がら再生ＦＲ以外のたとえば録画時に切換える際に
、スイッチ手段を開けば受信信号処理回路の出力信号を
そのまま録画再生信号処理回路に与えることができるの
で、切換時における受信信号処理回路出力の立上がり不
良を防止できる。As described above, according to the present invention, the output terminal of the received signal processing circuit is provided with the switch means which is grounded in an alternating current manner when closed, so that when the switch means is closed during reproduction, the output of the received signal processing circuit is The high-frequency components included in the signal processing circuit are no longer applied to the recording signal processing circuit, and the output of the receiving signal processing circuit can be prevented from causing interference. In addition, when switching between playback and playback FR, for example during recording, by opening the switch means, the output signal of the reception signal processing circuit can be directly given to the recording and playback signal processing circuit, so that the reception signal processing circuit output at the time of switching. It is possible to prevent startup failure.
図面はこの発明の一実施例の概−８ブロック図である。
図においで、１は受信信号処理回路、２は録画再生信号
処理回路、３はモニタ、４はスイッチ切換出力、５はス
イッチ、６はコンデンサを示す。
代理人 葛 野 信 −（外１名）The drawing is a schematic block diagram of one embodiment of the present invention. In the figure, 1 is a received signal processing circuit, 2 is a recording/reproducing signal processing circuit, 3 is a monitor, 4 is a switch switching output, 5 is a switch, and 6 is a capacitor. Agent Shin Kuzuno - (1 other person)
Claims (1)
も前記受信回路の出力を受（プる録画再生信号処理回路
とを含む…気録側再生装置において、その一端が前記受
信回路出力端に接続され、その他端が交流的に接地され
るスイッチ手段を含み、再生時において、前記スイッチ
手段を閉じて前記受信回路出力に現われる高域成分を前
記録画再生信号処理回路に与えないようにしたことを特
徴とする、磁気録画再生装置。A recording playback device including a receiving circuit that receives a television broadcast signal, and a recording playback signal processing circuit that receives at least an output of the receiving circuit, one end of which is connected to the output end of the receiving circuit, The device further comprises a switch means whose other end is grounded in an alternating current manner, and during playback, the switch means is closed to prevent high-frequency components appearing in the output of the receiving circuit from being applied to the recording and playback signal processing circuit. A magnetic recording and playback device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57212416A JPS59101980A (en) | 1982-12-01 | 1982-12-01 | Magnetic picture recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57212416A JPS59101980A (en) | 1982-12-01 | 1982-12-01 | Magnetic picture recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59101980A true JPS59101980A (en) | 1984-06-12 |
Family
ID=16622220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57212416A Pending JPS59101980A (en) | 1982-12-01 | 1982-12-01 | Magnetic picture recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59101980A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI675949B (en) * | 2014-12-19 | 2019-11-01 | 日商大和縫紉機製造股份有限公司 | Sewing machine for hem |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5465008A (en) * | 1977-11-02 | 1979-05-25 | Hitachi Ltd | Television receiver with magnetic video recorder- reproducer |
| JPS5678231A (en) * | 1979-11-29 | 1981-06-27 | Mitsumi Electric Co Ltd | High-frequency switch |
-
1982
- 1982-12-01 JP JP57212416A patent/JPS59101980A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5465008A (en) * | 1977-11-02 | 1979-05-25 | Hitachi Ltd | Television receiver with magnetic video recorder- reproducer |
| JPS5678231A (en) * | 1979-11-29 | 1981-06-27 | Mitsumi Electric Co Ltd | High-frequency switch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI675949B (en) * | 2014-12-19 | 2019-11-01 | 日商大和縫紉機製造股份有限公司 | Sewing machine for hem |
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