PURPOSE: To simplify the circuit constitution for suppressing large amplitude changes by adopting the circuit constitution calculating repetitively amplitude data and prescribed data.
CONSTITUTION: When a mute release control circuit 43 is logical 1 and an input is given to a terminal 30 of an arithmetic circuit 37, an intermediate value between high reliability data and data from a latch 36 is calculated and otputted to a data selector 34. On the other hand, a calculated output data is fed again to the latch circuit 36. An intermediate value between the former intermediate data and data inputted to a terminal 31 is outputted at the next period T. Moreover, an intermediate value between the data outputted just before and the high reliability data inputted to the terminal 31 is outputted at the next T period. The data approaches gradually by repeating the procedure above to release the muting.
HIRASAWA KATAHIDE
KOUZUKI SUSUMU
KASHIDA MOTOICHI
TAKEI MASAHIRO
NAGASAWA KENICHI
