JPS5760509A - Control system for horizontal synchronizing signal - Google Patents

Control system for horizontal synchronizing signal

Info

Publication number
JPS5760509A
JPS5760509A JP13383080A JP13383080A JPS5760509A JP S5760509 A JPS5760509 A JP S5760509A JP 13383080 A JP13383080 A JP 13383080A JP 13383080 A JP13383080 A JP 13383080A JP S5760509 A JPS5760509 A JP S5760509A
Authority
JP
Japan
Prior art keywords
decision
contraction
expansion
signal
synchronizing signals
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
JP13383080A
Other languages
Japanese (ja)
Other versions
JPH0145154B2 (en
Inventor
Chitoshi Hibino
Harukuni Kohari
Shigeru Yamazaki
Takao Arai
Masaharu Kobayashi
Takashi Hoshino
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.)
Hitachi Ltd
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Hitachi Ltd
Victor Company of Japan Ltd
Nippon Victor KK
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 Hitachi Ltd, Victor Company of Japan Ltd, Nippon Victor KK filed Critical Hitachi Ltd
Priority to JP13383080A priority Critical patent/JPS5760509A/en
Priority to US06/305,779 priority patent/US4420775A/en
Priority to DE3138310A priority patent/DE3138310C2/en
Priority to GB8128994A priority patent/GB2086177B/en
Publication of JPS5760509A publication Critical patent/JPS5760509A/en
Publication of JPH0145154B2 publication Critical patent/JPH0145154B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1806—Pulse code modulation systems for audio signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/19—Monitoring patterns of pulse trains

Abstract

PURPOSE:To prevent the production of abnormal sound, by avoiding the error in the number of horizontal synchronizing signals, through the decision of expansion and contraction of composite synchronizing signals due to mixture of noise and the fields of odd/even numbers and the control according to the result of decision. CONSTITUTION:To the input of a polarity inversion circuit 28 forming an expansion and contraction deciding circuit J, an output signal 22a from a switching control signal generating circuit which shows if the input is in compensated state, is given. Decision pulses for expansion and contraction are respectively given to the output of AND circuits 24, 25. Thus, the expansion and contraction of composite synchronizing signals can be decided. Next, it is decided as an even number of field if a pulse 7b for decision is presented in a pattern V synchronizing signal 3a of H/2 pulse width and the 7b is presented in a signal delaying the pattern V synchronizing signal 3a by H/2. The control mode changes from the result of decision, allowing to avoid the production of abnormal sound through avoiding the number of horizontal synchronizing signals in error.
JP13383080A 1980-09-26 1980-09-26 Control system for horizontal synchronizing signal Granted JPS5760509A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP13383080A JPS5760509A (en) 1980-09-26 1980-09-26 Control system for horizontal synchronizing signal
US06/305,779 US4420775A (en) 1980-09-26 1981-09-25 Circuit and method for protecting a horizontal synchronous signal
DE3138310A DE3138310C2 (en) 1980-09-26 1981-09-25 Circuit arrangement for controlling the horizontal sync signals for a PCM signal playback device
GB8128994A GB2086177B (en) 1980-09-26 1981-09-25 Circuit and method for monitoring and correcting a faulty horizontal synchronous signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13383080A JPS5760509A (en) 1980-09-26 1980-09-26 Control system for horizontal synchronizing signal

Publications (2)

Publication Number Publication Date
JPS5760509A true JPS5760509A (en) 1982-04-12
JPH0145154B2 JPH0145154B2 (en) 1989-10-02

Family

ID=15114033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13383080A Granted JPS5760509A (en) 1980-09-26 1980-09-26 Control system for horizontal synchronizing signal

Country Status (1)

Country Link
JP (1) JPS5760509A (en)

Also Published As

Publication number Publication date
JPH0145154B2 (en) 1989-10-02

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