Method and apparatus for sampling a reference signal

Details Method and apparatus for sampling a reference signal Method and apparatus for sampling a reference signal

1992-10-21

1994-10-11

Powell, Mark R.

Television

Synchronization

Phase locking regenerated subcarrier to color burst

348539, 348654, H04N 944

Patent

active

053551729

ABSTRACT:
A method and an apparatus for sampling a reference signal so as to generate an error signal indicative of a phase error between an actual sampling phase and a desired sampling phase. The desired sampling phase is displaceable from an optimum sampling phase, so as to facilitate the sampling of an NTSC color burst signal or to effect hue control during sampling of the modulated chroma sub-carrier. The reference signal is sampled at the frequency of said signal and a plurality of said samples are accumulated. After said samples have been accumulated, said accumulation is multiplied by the sine or by the cosine of the phase displacement angle between the optimum sampling phase and the derived sampling phase.

REFERENCES:
patent: 4598310 (1986-07-01), Brand
patent: 5067011 (1991-11-01), Basile et al.
patent: 5130787 (1992-07-01), Ozaki et al.
patent: 5161005 (1992-11-01), Harradine
patent: 5210619 (1993-05-01), Inoue

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