JPS5745785A - Voice signal noise eliminating circuit for magnetic record reproducing device - Google Patents

Voice signal noise eliminating circuit for magnetic record reproducing device

Info

Publication number
JPS5745785A
JPS5745785A JP55121050A JP12105080A JPS5745785A JP S5745785 A JPS5745785 A JP S5745785A JP 55121050 A JP55121050 A JP 55121050A JP 12105080 A JP12105080 A JP 12105080A JP S5745785 A JPS5745785 A JP S5745785A
Authority
JP
Japan
Prior art keywords
reproducing
signal
circuit
changeover
reproducing track
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
JP55121050A
Other languages
Japanese (ja)
Other versions
JPH0133990B2 (en
Inventor
Shigeyuki Ito
Yoshizumi Wataya
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 JP55121050A priority Critical patent/JPS5745785A/en
Priority to CA000381532A priority patent/CA1157939A/en
Priority to EP81303210A priority patent/EP0044687B1/en
Priority to DE8181303210T priority patent/DE3174052D1/en
Priority to AT81303210T priority patent/ATE18616T1/en
Priority to US06/283,186 priority patent/US4843488A/en
Publication of JPS5745785A publication Critical patent/JPS5745785A/en
Publication of JPH0133990B2 publication Critical patent/JPH0133990B2/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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/14—Masking or switching periodically, e.g. of rotating heads
    • 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
    • H04N5/911—Television signal processing therefor for the suppression of noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To eliminate noise of large amplitude at the time of changeover of reproducing track without causing disturbance of reproduced picture and deterioration of sound quality by using a reproducing track change signal and a synchronizing reproducing track change signal changing them at need. CONSTITUTION:Reproducing signals are taken out from a magnetic recording medium by a reproducing head 2 or 3 and inputted to a changeover switch circuit 6 through a preamplifier 4 or 5, respectively, and the reproducing track is changed by the circuit 6. When noise is generated in reproducing voice signals, a retriggerable monostable multivibrator 21 is activated to detect the dropout of signal 19, and a changing circuit consisting of AND circuits 22, 23 and an OR circuit 24 is controlled by the detection signal. When the signal 19 is in lacking state, a reproducing track changeover signal 16 is outputted. In other cases, a synchronized reproducing track changeover signal 25 synchronized to zero cross point of periodical noise obtained from the monostable multivibrator 15 and FF17 is outputted to control a holding signal generating circuit 27 and the circuit 6. Thus, noise at the time of reproducing track changeover is eliminated.
JP55121050A 1980-07-14 1980-09-03 Voice signal noise eliminating circuit for magnetic record reproducing device Granted JPS5745785A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP55121050A JPS5745785A (en) 1980-09-03 1980-09-03 Voice signal noise eliminating circuit for magnetic record reproducing device
CA000381532A CA1157939A (en) 1980-07-14 1981-07-10 Noise elimination circuit in a magnetic recording and reproducing apparatus
EP81303210A EP0044687B1 (en) 1980-07-14 1981-07-13 Noise elimination circuit in a magnetic recording and reproducing apparatus
DE8181303210T DE3174052D1 (en) 1980-07-14 1981-07-13 Noise elimination circuit in a magnetic recording and reproducing apparatus
AT81303210T ATE18616T1 (en) 1980-07-14 1981-07-13 CIRCUIT FOR ELIMINATING NOISE IN A MAGNETIC RECORDING AND PLAYBACK DEVICE.
US06/283,186 US4843488A (en) 1980-07-14 1981-07-14 Noise elimination circuit for reproduction of audio signals in a magnetic tape recording and reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55121050A JPS5745785A (en) 1980-09-03 1980-09-03 Voice signal noise eliminating circuit for magnetic record reproducing device

Publications (2)

Publication Number Publication Date
JPS5745785A true JPS5745785A (en) 1982-03-15
JPH0133990B2 JPH0133990B2 (en) 1989-07-17

Family

ID=14801584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55121050A Granted JPS5745785A (en) 1980-07-14 1980-09-03 Voice signal noise eliminating circuit for magnetic record reproducing device

Country Status (1)

Country Link
JP (1) JPS5745785A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539064A (en) * 1993-03-02 1996-07-23 Goo Chemical Industries Co., Ltd. Resist ink composition, printed circuit board produced by using the composition and process for producing the printed circuit board
US5723261A (en) * 1989-11-30 1998-03-03 Tamura Kaken Co., Ltd. Photopolymerizable composition
US6261741B1 (en) 1998-05-20 2001-07-17 Fujitsu Limited Photosensitive heat-resistant resin composition, method of patterning insulating film made of the same, and patterned insulating film obtained thereby
US6756166B2 (en) 2001-09-25 2004-06-29 Tamurakaken Corporation Photosensitive resin composition and printed wiring board

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5723261A (en) * 1989-11-30 1998-03-03 Tamura Kaken Co., Ltd. Photopolymerizable composition
US5539064A (en) * 1993-03-02 1996-07-23 Goo Chemical Industries Co., Ltd. Resist ink composition, printed circuit board produced by using the composition and process for producing the printed circuit board
US6261741B1 (en) 1998-05-20 2001-07-17 Fujitsu Limited Photosensitive heat-resistant resin composition, method of patterning insulating film made of the same, and patterned insulating film obtained thereby
US6756166B2 (en) 2001-09-25 2004-06-29 Tamurakaken Corporation Photosensitive resin composition and printed wiring board

Also Published As

Publication number Publication date
JPH0133990B2 (en) 1989-07-17

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