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US 5,297,209 AGranted
System for calibrating sound field
AssigneeFujitsu Ten Limited
InventorHiroshi Kowaki
Life of this patent
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Abstract
When a stereophonic broadcasting signal is interrupted because an electric field has weakened, a pilot signal 1 which designates that the electric field is not strong enough to separate an R-channel signal and an L-channel signal from a signal received by the tuner, is also interrupted. This interruption of the pilot signal changes gains and/or phases which act on an R-channel signal and/or an L-channel signal which are applied to a sound field calibrating system.
Claims4
A system for calibrating a sound field when a stereophonic broadcast is interrupted, comprising:
- two means for adjusting the respective amplitudes of an R-channel signal and an L-channel signal output from a stereophonic tuner;
- a means for mixing the R-channel signal and the L-channel signal output from said two amplitude adjusting means;
- a means for generating a calibrating signal in accordance with an output signal from said mixing means;
- a means for controlling the amplitudes and the output polarities of the R-channel signal and the L-channel signal from said two means for adjusting in accordance with the state of a pilot signal output from said stereophonic tuner that designates whether or not the stereophonic broadcast is interrupted.
1 more element
Dependencies are inferred from the claim text.