| 摘要 |
PURPOSE:To eliminate a sense of incongruity of a reproducing sound in case a noise is being generated, by executing a noise elimination processing of a sum signal, executing a reverberation addition processing to the sum signal which has been brought to the noise elimination processing and generating a pseudo difference signal. CONSTITUTION:In case of a normal state, a coefficient K of each multiplier 7-10 is set to '1' and the multiplier 7 and 8 are made to conduct, the multiplier 9 and 10 are cut off, and an L+R signal (sum signal) and an L-R signal (difference signal) of a converter IC 3 are led directly to a multiplexer 4. On the other hand, when a noise has been generated, the coefficient is set to '0' extending over the whole period in which the noise has been generated and the multiplier 7 and 8 are cut off, and the multiplier 9 and 10 are made to conduct, by which an L+R signal from a noise eliminating circuit 5 and a pseudo L-R signal from a reverberation adding circuit (a system of a shredder) 6 are led to the multiplexer 4, respectively. In this way, light and left output signals L, R which are separated by the multiplexer 4 become those which have a pseudo stereo reproducing sense.
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