JPH01103983U - - Google Patents

Info

Publication number
JPH01103983U
JPH01103983U JP19786987U JP19786987U JPH01103983U JP H01103983 U JPH01103983 U JP H01103983U JP 19786987 U JP19786987 U JP 19786987U JP 19786987 U JP19786987 U JP 19786987U JP H01103983 U JPH01103983 U JP H01103983U
Authority
JP
Japan
Prior art keywords
signal
recording
synchronization signal
circuit
video 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.)
Granted
Application number
JP19786987U
Other languages
Japanese (ja)
Other versions
JPH0721010Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1987197869U priority Critical patent/JPH0721010Y2/en
Publication of JPH01103983U publication Critical patent/JPH01103983U/ja
Application granted granted Critical
Publication of JPH0721010Y2 publication Critical patent/JPH0721010Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の映像信号記録再生装置の概略
ブロツク図、第２図ａは同期信号伸張回路の概略
ブロツク図、同図ｂは同期信号圧縮回路の概略ブ
ロツク図、第３図ａはクランプ回路から出力され
る映像信号（白１００％）の波形図、同図ｂは同
期信号期間のみ同期信号レベルを６ｄＢ伸張した
波形図、第４図ａは第３図ａに示す映像信号をＦ
Ｍ変調した時の周波数分布図、同図ｂは第３図ｂ
に示す映像信号をＦＭ変調した時の周波数分布図
である。 １……クランプ回路、２……同期分離回路、３
……同期信号伸張回路、４……ＦＭ変調回路、５
……記録アンプ、６……記録ヘツド、７……磁気
テープ、８……再生ヘツド、９……プリアンプ、
１０……ＦＭ復調回路、１１……クランプ回路、
１２……同期分離回路、１３……同期信号圧縮回
路。 Figure 1 is a schematic block diagram of the video signal recording and reproducing apparatus of the present invention, Figure 2a is a schematic block diagram of a synchronizing signal expansion circuit, Figure b is a schematic block diagram of a synchronizing signal compression circuit, and Figure 3a is a clamping circuit. A waveform diagram of the video signal (white 100%) output from the circuit. Figure b is a waveform diagram with the synchronization signal level expanded by 6 dB only during the synchronization signal period. Figure 4a is a waveform diagram of the video signal shown in Figure 3a.
Frequency distribution diagram when M modulated, Figure b is Figure 3b
FIG. 3 is a frequency distribution diagram when the video signal shown in FIG. 1...Clamp circuit, 2...Synchronization separation circuit, 3
... Synchronous signal expansion circuit, 4 ... FM modulation circuit, 5
... Recording amplifier, 6 ... Recording head, 7 ... Magnetic tape, 8 ... Playback head, 9 ... Preamplifier,
10...FM demodulation circuit, 11...clamp circuit,
12... Synchronization separation circuit, 13... Synchronization signal compression circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ＦＭ変調及びＦＭ復調を利用して記録媒体に映
像信号を記録及び再生する装置において、信号記
録系のＦＭ変調回路の前段に映像信号の同期信号
部分を伸張する同期信号伸張手段が設けられると
ともに、信号再生系のＦＭ復調回路の後段に映像
信号の同期信号部分を圧縮する同期信号圧縮手段
が設けられたことを特徴とする映像信号記録再生
装置。 In an apparatus for recording and reproducing video signals on a recording medium using FM modulation and FM demodulation, a synchronization signal decompression means for decompressing a synchronization signal portion of the video signal is provided before an FM modulation circuit of a signal recording system, and A video signal recording and reproducing device characterized in that a synchronization signal compression means for compressing a synchronization signal portion of a video signal is provided at a subsequent stage of an FM demodulation circuit of a signal reproduction system.
JP1987197869U 1987-12-25 1987-12-25 Video signal recording / reproducing device Expired - Lifetime JPH0721010Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987197869U JPH0721010Y2 (en) 1987-12-25 1987-12-25 Video signal recording / reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987197869U JPH0721010Y2 (en) 1987-12-25 1987-12-25 Video signal recording / reproducing device

Publications (2)

Publication Number Publication Date
JPH01103983U true JPH01103983U (en) 1989-07-13
JPH0721010Y2 JPH0721010Y2 (en) 1995-05-15

Family

ID=31488401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987197869U Expired - Lifetime JPH0721010Y2 (en) 1987-12-25 1987-12-25 Video signal recording / reproducing device

Country Status (1)

Country Link
JP (1) JPH0721010Y2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60187195A (en) * 1984-03-07 1985-09-24 Sony Corp Transmitting device of video signal
JPS60201567A (en) * 1984-03-23 1985-10-12 Mitsubishi Electric Corp Magnetic video recording and reproducing device
JPS61228787A (en) * 1985-04-03 1986-10-11 Hitachi Ltd Recording method for video signal
JPS62256588A (en) * 1986-04-30 1987-11-09 Sony Corp Recording and reproducing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60187195A (en) * 1984-03-07 1985-09-24 Sony Corp Transmitting device of video signal
JPS60201567A (en) * 1984-03-23 1985-10-12 Mitsubishi Electric Corp Magnetic video recording and reproducing device
JPS61228787A (en) * 1985-04-03 1986-10-11 Hitachi Ltd Recording method for video signal
JPS62256588A (en) * 1986-04-30 1987-11-09 Sony Corp Recording and reproducing device

Also Published As

Publication number Publication date
JPH0721010Y2 (en) 1995-05-15

Similar Documents

Publication Publication Date Title
JPH02118322U (en)
JPH01103983U (en)
JPS6128152U (en) Audio FM recording system video tape recorder
JPS6213209Y2 (en)
JPS6257484U (en)
JPS6273358U (en)
JPH04259178A (en) Dubbing device for magnetic disk
JPH0380560U (en)
JPS5917054U (en) video tape recorder
JPS59118112U (en) magnetic recording and reproducing device
JPS63168665U (en)
JPS6365167U (en)
JPS63181154U (en)
JPS6269806U (en)
JPH0348983U (en)
JPH01135878U (en)
JPS61163373U (en)
JPH04366465A (en) Digital audio recorder
JPS6365168U (en)
JPS6391859U (en)
JPH02110005U (en)
JPS63200976U (en)
JPS61104689U (en)
JPS6358362U (en)
JPS6412263U (en)