Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1993-04-15
1995-10-10
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
348625, H04N 140
Patent
active
054575460
ABSTRACT:
A video signal transient edge enhancing device and method which can clearly display an image by properly enhancing transient edges of video signals having different frequency bands according to the respective frequency bands. The device of the present invention comprises a plurality of transient edge enhancers for enhancing transient edges by respective proper bandwidths with respect to a plurality of input video signals having different frequency bands, and an enhancer selector for selecting one enhancer among the transient edge enhancers according to a selection control signal determined according to bands of the input video signals and outputting a video signal enhanced by the selected enhancer. According to the present invention, widths of the transient edges, which are different from one another according to the frequency bands of the input video signals, are detected and a proper enhancer is selected according to the transient width detecting information, thereby enhancing the corresponding video signal. Accordingly, accurate enhancement for transition edges can be performed regardless of the type of input video signal and noise components can be removed. Also, since the transient edge enhancing process is not performed with respect to a sharp transient edge, a clear image suitable for human visual characteristics can be obtained.
REFERENCES:
patent: 4414564 (1983-11-01), Hitchcock
patent: 4499493 (1985-02-01), Nishimura
patent: 4532548 (1985-07-01), Zwirn
patent: 4541014 (1985-09-01), Yagi
patent: 4739395 (1988-04-01), Johanndeiter
patent: 4918528 (1990-04-01), Oohashi
patent: 5031227 (1991-06-01), Raasch et al.
patent: 5151787 (1992-09-01), Park
Coles Sr. Edward L.
Goldstar Co. Ltd.
Nguyen Madeleine
LandOfFree
Video signal transient edge enhancing device and method for imag does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video signal transient edge enhancing device and method for imag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal transient edge enhancing device and method for imag will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2314170