Receiver for compatible FM stereophonic system utilizing companding of difference signal
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United States of America Patent
Stats
-
Sep 6, 1988
Grant Date -
N/A
app pub date -
Jul 9, 1987
filing date -
Jul 9, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the receiver of an FM stereo broadcasting system which transmits both the usual stereo difference signal S and a compressed version S' of the difference signal compressed according to a compression characteristic such that signals in a lower portion of the audio frequency spectrum are not compressed and signals having frequencies above said portion are compressed, according to a desired characteristic, instead of complementarily expanding the compressed difference signal, only those signal frequencies that have been compressed at the transmitter are expanded.
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