H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/73
H04B 1/16 (2006.01) H04H 5/00 (2006.01)
Patent
CA 1237479
ABSTRACT Certain, but not all AM stereo radio broadcasting and reception systems suffer from a severe form of reception anomaly wherein the perceived stereo image moves from side to side, back and forth, which effect has come to be known as "Stereo Platform Motion" or simply "Platform Motion". A prior art patent proposed a method far sensing reception conditions conductive to Platform Motion and then switching the receiver from stereo to monophonic reception to avoid Platform Motion. The present invention enables the AM stereo receiver to maintain stereo operation under such reception conditions, and instead of switching the receiver to monophonic operation, it switches the receiver to a different method of stereo reception that does not suffer from Platform Motion. -1-
523805
Johnson Douglas S. Q.c.
Kahn Leonard R.
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