Television – Image signal processing circuitry specific to television – Transition or edge sharpeners
Reexamination Certificate
2005-12-06
2005-12-06
Miller, John (Department: 2614)
Television
Image signal processing circuitry specific to television
Transition or edge sharpeners
C348S625000, C348S776000, C348S380000, C315S371000
Reexamination Certificate
active
06972805
ABSTRACT:
An apparatus displays a video signal (VID) by means of a scan (SCAN). The apparatus may be, for example, a television set. The apparatus comprises a device (SCAVEM) for modulating the scanning rate (Vscan) as a function of the derivative (DLUM) of a luminance signal (LUM) extracted from the video signal (VID). This enables the subjective display quality to be improved. The apparatus has the following characteristic feature in order to obtain an even better quality, notably when the apparatus is used for displaying video signals of different types. The derivative (DLUM) of the luminance signal, as a function of which the scanning rate (Vscan) is modulated, is obtained by means of a difterentiator circuit (DIFF) having a controllable frequency response (CFR).
REFERENCES:
patent: 4261014 (1981-04-01), Lee
patent: 4309725 (1982-01-01), Groeneweg
patent: 5072300 (1991-12-01), Anderson
patent: 5093728 (1992-03-01), Altmanshofer
patent: 5164829 (1992-11-01), Wada
patent: 5179320 (1993-01-01), Tripod
patent: 5196941 (1993-03-01), Altmanshofer
patent: 5351094 (1994-09-01), Washino
patent: 5420645 (1995-05-01), Traa et al.
patent: 5587745 (1996-12-01), Griepentrog et al.
patent: 5600381 (1997-02-01), Griepentrog
patent: 5619279 (1997-04-01), Vacher et al.
patent: 6407519 (2002-06-01), Sakurai
patent: 0723365 (1996-07-01), None
Patent Abstracts of Japan, No. 63-123275, May 27, 1988, “Outline Correcting Device for Video”.
Patent Abstracts of Japan, No. 05-037801, Feb. 12, 1993, “High Definition Television Receiver”.
Bogaert Marnik
Vilard Philippe
Desir Jean W.
Koninklijke Philips Electronics , N.V.
Miller John
LandOfFree
Display of a video signal by means of a line scan does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Display of a video signal by means of a line scan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display of a video signal by means of a line scan will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3498314