JPS54159125A - Correction circuit - Google Patents

Correction circuit

Info

Publication number
JPS54159125A
JPS54159125A JP6853878A JP6853878A JPS54159125A JP S54159125 A JPS54159125 A JP S54159125A JP 6853878 A JP6853878 A JP 6853878A JP 6853878 A JP6853878 A JP 6853878A JP S54159125 A JPS54159125 A JP S54159125A
Authority
JP
Japan
Prior art keywords
level
error
signal
chroma signal
carrier
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
JP6853878A
Other languages
Japanese (ja)
Other versions
JPS6153911B2 (en
Inventor
Shoji Omori
Kiyonori Tominaga
Atsushi Matsuzaki
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP6853878A priority Critical patent/JPS54159125A/en
Priority to FR7914600A priority patent/FR2428364A1/en
Publication of JPS54159125A publication Critical patent/JPS54159125A/en
Publication of JPS6153911B2 publication Critical patent/JPS6153911B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/47—Colour synchronisation for sequential signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To obtain faster speed for the correction time and to achieve stable correction against noise, by changing the detection level of the circuit correcting error corresponding to the level of chroma signal, and taking the reference level when the reception electric field level is greater and lowering it when the level is small.
CONSTITUTION: The chroma demodulation circuits 6B and 6R demodulate the color difference signals Sb and Sr from the carrier chroma signal of SECAM of PAL system. Further, if the carrier chroma signal or carrier signal fed to the circuits 6B and 6R is in error from the normal signal, this is corrected. That is, the detection level of the circuit 25 correcting error is changed corresponding to the level of the chroma signal Sc, and when the reception electric field level is greater, it is taken as the reference level and when it is small, the level is lowered. Thus, the time until the error is corrected is faster and the correction can stably be made against noise.
COPYRIGHT: (C)1979,JPO&Japio
JP6853878A 1978-06-07 1978-06-07 Correction circuit Granted JPS54159125A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP6853878A JPS54159125A (en) 1978-06-07 1978-06-07 Correction circuit
FR7914600A FR2428364A1 (en) 1978-06-07 1979-06-07 Colour demodulator for video signals in SECAM system - has comparator rapidly correcting erroneous colour identification and restoring proper commutator phase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6853878A JPS54159125A (en) 1978-06-07 1978-06-07 Correction circuit

Publications (2)

Publication Number Publication Date
JPS54159125A true JPS54159125A (en) 1979-12-15
JPS6153911B2 JPS6153911B2 (en) 1986-11-19

Family

ID=13376610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6853878A Granted JPS54159125A (en) 1978-06-07 1978-06-07 Correction circuit

Country Status (2)

Country Link
JP (1) JPS54159125A (en)
FR (1) FR2428364A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5539433A (en) * 1978-09-13 1980-03-19 Toshiba Corp Identification signal detection circuit in secam system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829677B2 (en) * 1975-07-25 1983-06-24 ソニー株式会社 Irofukuchiyou Cairo

Also Published As

Publication number Publication date
FR2428364A1 (en) 1980-01-04
JPS6153911B2 (en) 1986-11-19
FR2428364B1 (en) 1983-02-25

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