JPS5476206A - Signal detection system - Google Patents

Signal detection system

Info

Publication number
JPS5476206A
JPS5476206A JP14369577A JP14369577A JPS5476206A JP S5476206 A JPS5476206 A JP S5476206A JP 14369577 A JP14369577 A JP 14369577A JP 14369577 A JP14369577 A JP 14369577A JP S5476206 A JPS5476206 A JP S5476206A
Authority
JP
Japan
Prior art keywords
control signal
signal
recorded
tracking filter
automatic stop
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
JP14369577A
Other languages
Japanese (ja)
Inventor
Yoshio Maniwa
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 JP14369577A priority Critical patent/JPS5476206A/en
Publication of JPS5476206A publication Critical patent/JPS5476206A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable automatic signal and control signal to be surely detected by using a plurality of burst waves of a low frequency of the same frequency for the stop signal and control signal and detecting these with a tracking filter.
CONSTITUTION: In a circuit consisting of a recording medium I, recording part II reproducing part III, the audio signal from terminal AU is recorded in the recording medium I through a high-pass filter 1, after which the burst waves of the automatic stop signal and control signal are supplied from terminal SC and are recorded. At the reproduction, said automatic stop signal and control signal are detected with a tracking filter 15 constituted by a PLL and the central frequency of the tracking filter 15 is made changeable by a time constant changeover circuit 21, whereby the automatic stop signal and control signal may be recorded at the time of both low and high speed reproductions and the system is so constituted that the number of the burst waves thereof is counted with a counter 18, whereby the control signal is obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP14369577A 1977-11-30 1977-11-30 Signal detection system Pending JPS5476206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14369577A JPS5476206A (en) 1977-11-30 1977-11-30 Signal detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14369577A JPS5476206A (en) 1977-11-30 1977-11-30 Signal detection system

Publications (1)

Publication Number Publication Date
JPS5476206A true JPS5476206A (en) 1979-06-18

Family

ID=15344803

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14369577A Pending JPS5476206A (en) 1977-11-30 1977-11-30 Signal detection system

Country Status (1)

Country Link
JP (1) JPS5476206A (en)

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