Television – Synchronization – Phase locking regenerated subcarrier to color burst
Patent
1996-06-28
1998-07-28
Peng, John K.
Television
Synchronization
Phase locking regenerated subcarrier to color burst
348642, 348508, H04N 506
Patent
active
057868654
ABSTRACT:
A digital amplitude and phase detector for detecting the amplitude and phase of a color burst digital signal used in television systems is provided. The detector comprises a phase lock loop circuit for detecting the phase of said color burst signal and for generating a synchronous constant amplitude sinusoidal signal; multiplying circuit for generating a product signal by multiplying the color burst signal by the constant amplitude sinusoidal signal, wherein said product signal has a high-frequency component and a low-frequency component having an amplitude substantially proportional to that of the color burst signal; and low pass filter circuit coupled to said multiplying circuit for filtering said product signal such that the high-frequency component is substantially suppressed relative to that of the low-frequency component. A video encoder using the digital amplitude and phase detector is also provided.
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Krauss et al., pp. 284-285 ("Product Detectors") in Solid State Radio Engineering, New York: John Wiley & Sons, 1980.
Ayzenberg Oscar
Tsyrganovich Anatoliy V.
Desir Jean W.
Peng John K.
Zilog Inc.
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