Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1977-07-01
1980-01-01
Griffin, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 521
Patent
active
041819179
ABSTRACT:
A color television receiving system for NTSC-type signals is provided with signal processing circuitry and methods for reducing the visibility of color infidelities, such as incorrect highs, polarity reversals, and errors in visual luminance, which are visible in regions of sharp color transitions. Such infidelities are substantially reduced by effectively supplementing either the chrominance or the primary color signals with inferred high-frequency chrominance components which components are, respectively, processed from signal information discovered to be inherently available in NTSC-type signals and their implicit constraints. Specifically, it has been found that in regions of sharp color transitions, high frequency chrominance components can be scaled from the high frequency portion of the received monochrome signal in accordance with the respective ratios of the time rate of change of the received reduced bandwidth chrominance signal to the time rate of change of a comparable low frequency component of the received monochrome video signal. Alternatively, inferred high frequency primary color components can be analogously derived. A variety of specific circuit embodiments and methods can be used to process suitable inferred high frequency components.
REFERENCES:
patent: 2905753 (1959-09-01), Loughlin
patent: 3778543 (1973-12-01), Lowry
patent: 3836707 (1974-09-01), Murakami et al.
patent: 3984865 (1976-10-01), Avins
Griffin Robert L.
Psitos Aristotelis M.
Quadricolor Technology L.P.
LandOfFree
Color television receiving system utilizing inferred high freque 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 inferred high freque, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color television receiving system utilizing inferred high freque will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2122147