H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/37, 325/73
H04B 1/16 (2006.01) H04H 5/00 (2006.01)
Patent
CA 1244520
ABSTRACT A stereophonic broadcasting system incorporat- ing companding of the difference signal in which both the usual difference signal and a compressed version of the difference signal are transmitted to one or more remote receivers. At the receiver the usual difference signal and the compressed difference sig- nal are combined and the resulting signal then ex- panded to obtain a noise-reduced difference signal for matrixing with the sum signal to obtain the orig- inal left and right signals. Utilizing both differ- ence signals increases the effective level of the re- ceived difference signal by 6dB, whereas the noise is increased only 3dB, for a net improvement of 3dB in signal-to-noise ratio. Utilization of both differ- ence signals at the receiver also permits compression of the difference signal according to any desired compression law.
497163
Broadcast Technology Partners
Gowling Lafleur Henderson Llp
LandOfFree
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