System for inexpensive phase coherent subcarrier generation

Details System for inexpensive phase coherent subcarrier generation System for inexpensive phase coherent subcarrier generation

1994-04-01

1997-04-15

Kostak, Victor R.

Television

Synchronization

Phase locking regenerated subcarrier to color burst

348537, 348549, H04N 945, H04N 9455

Patent

active

056214723

ABSTRACT:
The present invention is a system for inexpensive phase coherent subcarrier generation. The subcarrier sequence has a fairly short periodicity (two lines), allowing a relatively short lookup table to hold coded values precisely representing the sampled subcarrier. A variety of modulation techniques may be employed to minimize the error between the reconstructed subcarrier sine wave and an "ideal" subcarrier sine wave. The SCH phase may be easily varied by using a different table of subcarrier sine wave values.

REFERENCES:
patent: 4328513 (1982-05-01), Furihato et al.
patent: 4974082 (1990-11-01), Heitmann
patent: 5025310 (1991-06-01), Sekiya et al.
patent: 5095279 (1992-03-01), Quan et al.
patent: 5298998 (1994-03-01), Furumiya et al.

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