The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2000
Filed:
Jan. 30, 1997
Applicant:
Inventor:
Takashi Kagawa, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348616 ; 348609 ; 348607 ; 348665 ; 386 21 ; 386113 ; 386114 ;
Abstract
An output signal of an 1H delaying circuit and a signal received from an input terminal are supplied to a subtracting circuit that forms a comb line filter. Thus, even if a dropout takes place in a luminance signal, not in a chroma signal, the chroma signal can be obtained from an output signal at intervals of 1H. When a dropout takes place, a limit operation of a feedback loop that forms a noise reduction circuit is stopped and the coefficient is increased. This process is performed with a dropout pulse that is delayed by 1H. Thus, the chroma signal can be obtained on the next line of the line having the dropout.