SECAM-PAL Converter

Details SECAM-PAL Converter SECAM-PAL Converter

1979-01-05

1980-11-11

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 942

Patent

active

042336228

ABSTRACT:
A SECAM-encoded chrominance signal is converted to a chrominance signal of a quasi-PAL form for further processing in PAL decoder apparatus. Converter includes an FM detector serving to demodulate respective SECAM subcarriers sequentially, and a modulator wherein the color-difference signals recovered by the FM detector amplitude modulate in appropriate sequence quadrature-related phases of PAL subcarrier frequency oscillations derived from the PAL decoder. The color-difference signals supplied to the modulator are augmented by line rate pedestals effecting the insertion of bursts in the quasi-PAL signal developed by the modulator. The phasing of the inserted bursts alternates between a first phase corresponding to the oscillation phase subject to modulation by R-Y color-difference signals, and a second phase differing from the first phase by 180.degree.. Insertion of bursts of the first phase immediately precedes the development of R-Y modulated subcarrier waves by the modulator, while insertion of bursts of the second phase immediately precedes the development of B-Y modulated subcarrier waves by the modulator.

REFERENCES:
patent: 4095254 (1978-06-01), Romeas

Affiliated with

Also associated with

Rating

SECAM-PAL Converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with SECAM-PAL Converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SECAM-PAL Converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1694459