Digital color encoder

Details Digital color encoder Digital color encoder

1981-02-04

1982-10-19

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 13, H04N 907, H04N 918

Patent

active

043553273

ABSTRACT:
A digital color encoder for a television camera in which during digitally modulating a carrier of 3f.sub.sc (f.sub.sc is a color subcarrier frequency) with a digital color signal which is obtained by sampling input video information data at a sampling pulse rate having a frequency of 3(n/m)f.sub.sc (with m and n being relatively small integers) at N line the digital color signal is amplitude modulated by 3-phase modulation vectors each having a phase difference of 2/3.pi. from each other so as to produce a digitally modulated color signal. At N+1 line, the digital color signal is amplitude modulated by the 3-phase modulation vectors each having a phase opposite to that at the N line so as to produce an output of N+1 line which is then phase inverted to provide a digital modulated color signal. Thus, a digital color television signal with color phase having the standard television signal format is obtained.

REFERENCES:
patent: 3946434 (1976-03-01), Shimada
patent: 4258384 (1981-03-01), Tatami
patent: 4288810 (1981-09-01), Drewery
Digital Processing Amplifier and Color Encoder, by Eto, et al., SMPTE Journal, vol. 87, No. 1, Jan. 1978, p. 15-19.

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