JPS55135346A - Signal detection system - Google Patents

Signal detection system

Info

Publication number
JPS55135346A
JPS55135346A JP4195879A JP4195879A JPS55135346A JP S55135346 A JPS55135346 A JP S55135346A JP 4195879 A JP4195879 A JP 4195879A JP 4195879 A JP4195879 A JP 4195879A JP S55135346 A JPS55135346 A JP S55135346A
Authority
JP
Japan
Prior art keywords
control
signals
signal
reproduced
fixed
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.)
Pending
Application number
JP4195879A
Other languages
Japanese (ja)
Inventor
Shigeru Yamazaki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP4195879A priority Critical patent/JPS55135346A/en
Publication of JPS55135346A publication Critical patent/JPS55135346A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE: To make mulfunctionless control possible by reproducing control signals, differing in frequency, recorded on a tape alternatey and by using for the control one signal of more than a fixed level among reproduced signals alternated as many as fixed.
CONSTITUTION: Control signals F1 and F2, differing in frequency, recorded on a tape alternately together with an audio signal are reproduced and then applied to rectifying integrating circuits 8 and 11 via BFP's 7 and 10 to generate pulse signals of widths corresponding to continuation periods of signals F1 and F2. As far as those pulse signals are generated, counter 13 is placed in an enable state via OR circuit 12 to count an integral output of signal F1 of more than a fixed level outputted by comparator 9, and the moment alternately repeated reproduced control signals are counted as many as fixed, monostable multivibrators 14 and 15 are triggered. Then, a signal generated only when the level of the reproduced control signal discriminated in terms of a noise, etc., due to reproduction outputs of different frequencies generated alternately is more than a fixed level is used for control, so that malfunctionless control over automatic reverse, etc., can be exercised.
COPYRIGHT: (C)1980,JPO&Japio
JP4195879A 1979-04-09 1979-04-09 Signal detection system Pending JPS55135346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4195879A JPS55135346A (en) 1979-04-09 1979-04-09 Signal detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4195879A JPS55135346A (en) 1979-04-09 1979-04-09 Signal detection system

Publications (1)

Publication Number Publication Date
JPS55135346A true JPS55135346A (en) 1980-10-22

Family

ID=12622689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4195879A Pending JPS55135346A (en) 1979-04-09 1979-04-09 Signal detection system

Country Status (1)

Country Link
JP (1) JPS55135346A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138006A (en) * 1981-02-20 1982-08-26 T C Denshi Kk Recording tape information code system
KR100459964B1 (en) * 1996-05-03 2005-02-07 코닌클리케 필립스 일렉트로닉스 엔.브이. Signal interruption detection circuit device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138006A (en) * 1981-02-20 1982-08-26 T C Denshi Kk Recording tape information code system
KR100459964B1 (en) * 1996-05-03 2005-02-07 코닌클리케 필립스 일렉트로닉스 엔.브이. Signal interruption detection circuit device

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