JPS5774810A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS5774810A
JPS5774810A JP55150095A JP15009580A JPS5774810A JP S5774810 A JPS5774810 A JP S5774810A JP 55150095 A JP55150095 A JP 55150095A JP 15009580 A JP15009580 A JP 15009580A JP S5774810 A JPS5774810 A JP S5774810A
Authority
JP
Japan
Prior art keywords
signal
adder
terminal
supplied
subchannel
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
JP55150095A
Other languages
Japanese (ja)
Other versions
JPS6314426B2 (en
Inventor
Shigeyuki Ito
Yoshizumi Wataya
Katsuo Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55150095A priority Critical patent/JPS5774810A/en
Publication of JPS5774810A publication Critical patent/JPS5774810A/en
Publication of JPS6314426B2 publication Critical patent/JPS6314426B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To give the same S/N to both a main channel and a subchannel, by constituting so that the ratio of the maximum frequency shift of a sound carrier wave by a main channel signal and a subchannel signal is made <=1, in a VTR which is capable of recording and reproducing a sound multiple signal. CONSTITUTION:A frequency modulation luminance signal (a) inputted from a terminal 21, and a frequency modulation chromaticity signal (b) inputted from a terminal 22 are synthesized by an adder 23, are amplified and recorded 30 in a magnetic tape 20. Keeping pace with this operation, a sound signal (c) of the first channel is supplied to a frequency modulator 32 from a terminal 28, a subchannel signal (e) which has modulated a carrier wave to be selected in the proximity of 31kHz is set to a prescribed level by a level regulator 27, and is supplied to an adder 25. At the same time, a main channel signal (d) from a terminal 29 is also set to a prescribed level by a level regulator 26, and is supplied to the adder 25. In this case, the ratio of the signal (d) and the signal (e) to the adder 25 is set to <=1. The outputs added 25 in this way are frequency-modulated 24 and are added 23 after S/N ratios of both the signals have been made almost equal.
JP55150095A 1980-10-28 1980-10-28 Magnetic recording and reproducing device Granted JPS5774810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55150095A JPS5774810A (en) 1980-10-28 1980-10-28 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55150095A JPS5774810A (en) 1980-10-28 1980-10-28 Magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS5774810A true JPS5774810A (en) 1982-05-11
JPS6314426B2 JPS6314426B2 (en) 1988-03-30

Family

ID=15489396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55150095A Granted JPS5774810A (en) 1980-10-28 1980-10-28 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5774810A (en)

Also Published As

Publication number Publication date
JPS6314426B2 (en) 1988-03-30

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