JPS61248674A - Detection circuit for frame timing - Google Patents

Detection circuit for frame timing

Info

Publication number
JPS61248674A
JPS61248674A JP60088822A JP8882285A JPS61248674A JP S61248674 A JPS61248674 A JP S61248674A JP 60088822 A JP60088822 A JP 60088822A JP 8882285 A JP8882285 A JP 8882285A JP S61248674 A JPS61248674 A JP S61248674A
Authority
JP
Japan
Prior art keywords
integrator
prescribed
state
line
frame timing
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
JP60088822A
Other languages
Japanese (ja)
Other versions
JPH0666896B2 (en
Inventor
Hiroyuki Iga
Junzo Murakami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP60088822A priority Critical patent/JPH0666896B2/en
Publication of JPS61248674A publication Critical patent/JPS61248674A/en
Publication of JPH0666896B2 publication Critical patent/JPH0666896B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to detect a high definition/high stable frame timing even in a low S/N time by integrating a binary signal which represents the state that a prescribed line is detected coarsely and the state that it is not detected, clearing an integrator when non-detecting states are continuously occurred by prescribed times and generating a pulse when the output of the integrator exceeds a prescribed value.
CONSTITUTION: Using the binary signal which represents a detecting state that the prescribed line representing the frame timing is coarsely detected and the non-detecting state, the binary signal is integrated at an integrator 4a and when the non-detecting states are occurred by the prescribed times continuously, the integrator 4a is cleared and when the output of the integrator 4a is exceeded over the prescribed value, the pulse which represents the state is generated. For example, the output signal f of a 606 line coarsing detection circuit 1 is supplied to the OR gate 33 of a clear circuit 3a, a 1CK delay circuit 31 and an AND gate 2. The outputs Q1∼Q10 of the counter 4a are supplied respectively to the A-inputs A1∼A10 of a comparator 5 and the B-inputs (B1∼B10) of the comparator 5 are connected with a slice level setting circuit 6. And the output signal of the 606 line coarsing detection circuit 1 is integrated at the counter 4a and the integrated result is compared with the prescribed value.
COPYRIGHT: (C)1986,JPO&Japio
JP60088822A 1985-04-26 1985-04-26 Frame timing detection circuit Expired - Lifetime JPH0666896B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60088822A JPH0666896B2 (en) 1985-04-26 1985-04-26 Frame timing detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60088822A JPH0666896B2 (en) 1985-04-26 1985-04-26 Frame timing detection circuit

Publications (2)

Publication Number Publication Date
JPS61248674A true JPS61248674A (en) 1986-11-05
JPH0666896B2 JPH0666896B2 (en) 1994-08-24

Family

ID=13953619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60088822A Expired - Lifetime JPH0666896B2 (en) 1985-04-26 1985-04-26 Frame timing detection circuit

Country Status (1)

Country Link
JP (1) JPH0666896B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61261973A (en) * 1985-05-15 1986-11-20 Sony Corp Frame synchronizing separator circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61261973A (en) * 1985-05-15 1986-11-20 Sony Corp Frame synchronizing separator circuit

Also Published As

Publication number Publication date
JPH0666896B2 (en) 1994-08-24

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