.~.~ Additional modulation of picture carrier (e.g., quadrature)
DEFINITION
Classification: 348/475
Additional modulation of picture carrier (e.g., quadrature):
(under subclass 473) Subject matter wherein the additional signal directly modulates a carrier of the same frequency as the picture carrier.
(1) Note. Most often the addition modulation is amplitude modulation of a carrier at 90 degrees to the picture carrier which is called quadrature modulation. However, both phase and frequency modulation of the carrier before or after amplitude modulation of the carrier by the video are classified herein.
