Digital color encoder

Details Digital color encoder Digital color encoder

H - Electricity

04

N

350/41

H04N 9/04 (2006.01) H04N 11/14 (2006.01)

Patent

CA 1146263

ABSTRACT OF THE DISCLOSURE In digitally modulating a carrier of 3fsc (fsc is a color subcarrier frequency) by a digital color signal which is obtained by sampling an input video information data with a sampling pulse of a frequency Image (m and n are relatively small integers), at N line the digital color signal is amplitude-modulated by 3-phase modulation vectors each having a phase different by ?.pi. each other thereby to produce a digital 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 thereby 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 having color phase of the standard tele- vision signal is obtained.

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