JPS5645A - Control signal detection system - Google Patents

Control signal detection system

Info

Publication number
JPS5645A
JPS5645A JP7396279A JP7396279A JPS5645A JP S5645 A JPS5645 A JP S5645A JP 7396279 A JP7396279 A JP 7396279A JP 7396279 A JP7396279 A JP 7396279A JP S5645 A JPS5645 A JP S5645A
Authority
JP
Japan
Prior art keywords
signal
control signal
automatic stop
recorded
detection system
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
JP7396279A
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 JP7396279A priority Critical patent/JPS5645A/en
Publication of JPS5645A publication Critical patent/JPS5645A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent misstop of recording and reproducing unit and to obtain the control signal other than automatic stop signal, by using the signal alternately repeating two signals different in the frequency for a given number of times as the automatic stop signal.
CONSTITUTION: The control signal is recorded in the recording medium 1 together with the audio signal. In this control signal, two signals F1, F2 different in frequency as shown in (a), are repetitively recorded for a given number of times and one signal, e.g., F2 is recorded in two different duration times. Since the signal like this is not present in conventional audio and music information, the automatic stop signal as shown in (h) can be obtained without malfunction. Simultaneously, when the signal longer in the signal F2 is used as digital information 1 and shorter one is as digital information O, the control signal having a plurality of functions other than the automatic stop signal, as shown in (i), can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP7396279A 1979-06-14 1979-06-14 Control signal detection system Pending JPS5645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7396279A JPS5645A (en) 1979-06-14 1979-06-14 Control signal detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7396279A JPS5645A (en) 1979-06-14 1979-06-14 Control signal detection system

Publications (1)

Publication Number Publication Date
JPS5645A true JPS5645A (en) 1981-01-06

Family

ID=13533204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7396279A Pending JPS5645A (en) 1979-06-14 1979-06-14 Control signal detection system

Country Status (1)

Country Link
JP (1) JPS5645A (en)

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