Digital color encoder using triangular wave modulation

Details Digital color encoder using triangular wave modulation Digital color encoder using triangular wave modulation

1995-02-27

1996-03-12

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Color encoder or chrominance signal modulator

348488, 348660, 348724, H04N 965

Patent

active

054990580

ABSTRACT:
This invention provides a digital color encoder for digitizing color video signals. The encoder forms a digitized color video signal using logic function processing of the digitized luminance signal and color difference signals. The encoder provides an output signal equivalent to the luminance signal added to the color difference signals modulated by triangular wave functions and sampled at the sampling frequency. The sampling frequency is eight times the crominance subcarrier frequency. An analog video signal can easily be recovered from the digital video signal because the fundamental frequency of the triangular wave is easily separated from the higher order harmonics.

REFERENCES:
patent: 4355327 (1982-10-01), Nagumo et al.
patent: 4686520 (1982-08-01), Yamaoka
patent: 4956701 (1990-09-01), Shioda
patent: 4982179 (1991-01-01), Ogawa et al.
patent: 5008740 (1991-04-01), Phillips et al.
patent: 5301015 (1994-04-01), Kim

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