Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1988-06-13
1989-09-26
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 16, 329357, H04N 966
Patent
active
048704806
ABSTRACT:
An asymmetrical sideband modulated (ASM) signal, such as an RF NTSC television signal is demodulated into in-phase and quadrature phase components, each of which are sampled at a sampling rate that is less than the Nyquist rate for the components. The signals, each of which includes aliasing distortion, are respective real and imaginary parts of a complex signal that is not subject to aliasing distortion at the chosen sampling frequency. The in-phase component of the signal is recovered by inserting zero-valued samples interstitially into each of the sampled in-phase and quadrature phase signals and then applying the modified signals to a complex filter. The resultant interpolated in-phase signal is a full bandwidth signal and is substantially free of aliasing distortion.
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Bauer Robert M.
Groody James J.
Hayes James B.
Herrmann Eric P.
RCA Licensing Corporation
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