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JPS54106123A - Luminance signal reproducer - Google Patents

Luminance signal reproducer

Info

Publication number
JPS54106123A
JPS54106123A JP1386478A JP1386478A JPS54106123A JP S54106123 A JPS54106123 A JP S54106123A JP 1386478 A JP1386478 A JP 1386478A JP 1386478 A JP1386478 A JP 1386478A JP S54106123 A JPS54106123 A JP S54106123A
Authority
JP
Japan
Prior art keywords
signal
luminance signal
demodulator
luminance
demodulating
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
JP1386478A
Other languages
Japanese (ja)
Other versions
JPS635957B2 (en
Inventor
Jun Hirai
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP1386478A priority Critical patent/JPS54106123A/en
Publication of JPS54106123A publication Critical patent/JPS54106123A/en
Publication of JPS635957B2 publication Critical patent/JPS635957B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To eliminate the stroke and other noises between tracks by adding the 1st luminance signal obtained by demodulating the signal which is angular-modulated by the luminance signal with the 2nd luminance signal obtained by delaying for one horizontal period and demodulating the modulated signal.
CONSTITUTION: When the recorded NTSC color video signals are reproduced, switches 101∼105 are turned to P side. Reproduced signals St from head 1A and 1B contain FM signal Sf, carrier chrominance signal Sc plus crosstalk Sx and Sk. And signal St is separated to signal Sf through HPF42 and to signal Sc through LPF61 each. Signal Sf enters detector circuit 53 via limiter 43 to detect the presence or absense of drop-out Do. When no DO is detected, signal Sf enters demodulator 44; while the signal controls switch 51 and is put into demodulator 54 after delayed by one horizontal period in case DO is detected. The output of demodulator 44 and 54 are added together to obtain luminance signal Sy. The comb-line filter is formed with circuit 44, 54, 52 and 55, and thus the cross-talk or noise occurring between tracks is interleaved to signal Sy and never appears at signal Sy.
COPYRIGHT: (C)1979,JPO&Japio
JP1386478A 1978-02-09 1978-02-09 Luminance signal reproducer Granted JPS54106123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1386478A JPS54106123A (en) 1978-02-09 1978-02-09 Luminance signal reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1386478A JPS54106123A (en) 1978-02-09 1978-02-09 Luminance signal reproducer

Publications (2)

Publication Number Publication Date
JPS54106123A true JPS54106123A (en) 1979-08-20
JPS635957B2 JPS635957B2 (en) 1988-02-05

Family

ID=11845110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1386478A Granted JPS54106123A (en) 1978-02-09 1978-02-09 Luminance signal reproducer

Country Status (1)

Country Link
JP (1) JPS54106123A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129289A (en) * 1984-07-20 1986-02-10 Hitachi Ltd Signal processing circuit of video signal recording and reproducing device
JPS6231293A (en) * 1985-08-02 1987-02-10 Canon Inc Picture reproducing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129289A (en) * 1984-07-20 1986-02-10 Hitachi Ltd Signal processing circuit of video signal recording and reproducing device
JPS6231293A (en) * 1985-08-02 1987-02-10 Canon Inc Picture reproducing device

Also Published As

Publication number Publication date
JPS635957B2 (en) 1988-02-05

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