Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1977-07-01
1980-01-08
Griffin, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 37, H04N 521, H04N 514
Patent
active
041830512
ABSTRACT:
A color television receiving system for NTSC-type signals is provided with signal processing circuitry and methods for reducing the visibility of color and luminance infidelities, such as incorrect or inverted highs, over-modulation and rectification which are visible in regions of sharp transitions from one color to another or in regions of concurrent high color saturation and significant high frequency detail. Such infidelities are substantially reduced by effectively supplementing either the chrominance or the primary color signals with inferred high-frequency chrominance components derived from signal information discovered to be inherently available in NTSC-type signals and their implicit constraints. Specifically, in one form of the invention it has been found that in regions of sharp color transitions and in regions of high color saturation, relevant high frequency chrominance components can be scaled from the high frequency portion of the received monochrome signals in accordance with different respective scaling algorithms. A receiving system is provided with multimode inferred highs correction circuitry responsive to a received NTSC-type signal for automatically deciding which, if any, correction modes are appropriate for a given time and frequency region of the received signal and automatically enabling correction circuitry for providing the appropriate inferred high frequency correction signals.
REFERENCES:
patent: 2905753 (1959-09-01), Loughlin
patent: 3778543 (1973-12-01), Lowry
patent: 3836707 (1974-09-01), Marakami et al.
patent: 3984865 (1976-10-01), Avias
Griffin Robert L.
Psitos Aristotelis M.
Quadricolor Technology L.P.
LandOfFree
Color television receiving system utilizing multimode inferred h does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color television receiving system utilizing multimode inferred h, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color television receiving system utilizing multimode inferred h will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1942479