JPS54161907A - Counting device of drop-outs - Google Patents

Counting device of drop-outs

Info

Publication number
JPS54161907A
JPS54161907A JP7032778A JP7032778A JPS54161907A JP S54161907 A JPS54161907 A JP S54161907A JP 7032778 A JP7032778 A JP 7032778A JP 7032778 A JP7032778 A JP 7032778A JP S54161907 A JPS54161907 A JP S54161907A
Authority
JP
Japan
Prior art keywords
agc circuit
drop
time constant
agc
outs
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
JP7032778A
Other languages
Japanese (ja)
Other versions
JPS6161185B2 (en
Inventor
Yoshiteru Kosaka
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP7032778A priority Critical patent/JPS54161907A/en
Publication of JPS54161907A publication Critical patent/JPS54161907A/en
Publication of JPS6161185B2 publication Critical patent/JPS6161185B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

PURPOSE: To enable drop-outs to be accurately counted by their duration by applying the levels of the reproduced signal from a recording medium to the second AGC circuit of a smaller time constant from the first AGC circuit and outputting the same as approximately a constant level.
CONSTITUTION: The reproduced frequency-modulated video signal incoming from input terminal 1 is supplied from an AGC circuit 2 of a large time constant to an AGC circuit 3 of an extremely small time constant where it is controlled so as to assume the level optimum for the AGC operation of the AGC circuit 3, after which it is made to an even envelope by an AGC circuit 3 of fast response. Hence, as compared to the drop-out counting device which had so far adjusted the meter while visually observing the same, the input level adjustment operation of the AGC circuit 3 may be performed automatically by the AGC circuit 2 and yet the change quantity of the envelope may be accurately detected.
COPYRIGHT: (C)1979,JPO&Japio
JP7032778A 1978-06-13 1978-06-13 Counting device of drop-outs Granted JPS54161907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7032778A JPS54161907A (en) 1978-06-13 1978-06-13 Counting device of drop-outs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7032778A JPS54161907A (en) 1978-06-13 1978-06-13 Counting device of drop-outs

Publications (2)

Publication Number Publication Date
JPS54161907A true JPS54161907A (en) 1979-12-22
JPS6161185B2 JPS6161185B2 (en) 1986-12-24

Family

ID=13428225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7032778A Granted JPS54161907A (en) 1978-06-13 1978-06-13 Counting device of drop-outs

Country Status (1)

Country Link
JP (1) JPS54161907A (en)

Also Published As

Publication number Publication date
JPS6161185B2 (en) 1986-12-24

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