NTSC and PAL compatible digital encoder

Details NTSC and PAL compatible digital encoder NTSC and PAL compatible digital encoder

1992-11-23

1994-04-05

Groody, James J.

Television

Format

Specified color signal format

348505, 348724, 348642, 348441, H04N 1114, H04N 945, H04N 965, H04N 966

Patent

active

053010159

ABSTRACT:
A digital encoder for use in both NTSC and PAL systems includes a demultiplexer for separating a time-division color difference signal R-Y/B-Y into color difference signals R-Y and B-Y. The separated color difference signals R-Y and B-Y are converted by a sub-carrier frequency converter into a sub-carrier frequency, and a digital modulator determines levels and phases of the converted color difference signals. A burst generating circuit generates a burst signal after determining a level and phase of the burst signal, and a chroma encoder produces a chroma signal by mixing an output of the digital modulator with the burst signal.

REFERENCES:
patent: 4217603 (1980-08-01), Hjortzberg
patent: 4355327 (1982-10-01), Nagumo et al.
patent: 4547796 (1985-10-01), Iwase et al.
patent: 4574302 (1986-03-01), Mackereth
patent: 4620222 (1986-10-01), Baba et al.
patent: 4982179 (1991-01-01), Ogawa et al.
patent: 5216496 (1993-06-01), Miyamoto et al.

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