H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/38
H04N 9/89 (2006.01) H04N 9/83 (2006.01)
Patent
CA 1089977
ABSTRACT OF THE INVENTION An uncorrected composite color television signal, including frequency-modulated luminance and frequency-transposed chrominance components is reproduced from a storage medium and separated by filters into its luminance and chrominance compo- nents. The chrominance component is coupled to a frequency converter for converting it back to its nominal frequency, i.e., its frequency prior to the frequency transposition. The frequency and phase of the output provided by the frequency converter is determined by a chrominance subcarrier reference signal provided by a generator. The uncorrected luminance component is employed to adjust the frequency and phase of the signal provided by the generator so that the provided reference signal is coherent with the uncorrected luminance component. This causes the frequency converted chrominance component to be stabilized to the reference signal and coherent with the uncorrected luminance component. Both components are then combined and coupled to a conventional line-to-line time-base corrector for correcting any time-base errors that are present in the combined components. -2a-
230043
Ampex Corporation
Macrae & Co.
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