JPS6478465A - Digital sound signal regenerating device - Google Patents

Abstract

PURPOSE:To upgrade the quality of a sound signal by constituting the titled device in such a manner that a change-over switch is switched when the level of a sound signal is decided by a decision circuit to be exceeding a threshold. CONSTITUTION:Based on an error correction arithmetic result detected by a C1 error detection circuit 30 or a C2 error detection circuit 31, a distribution recognition circuit 36 recognized a distribution situation. An output from a C12 error detection circuit 32 is a final arithmetic result, and is compared with a calculation result from a counter circuit 37 in a comparator circuit 40, so that whether a muting action is to be executed or not is decided by a decision circuit 22 based on the result of said comparison and an output signal from the circuit 36, and thus the change-over switch S1 is switched. By making use of an interim result of error correction arithmetic operation in such a way as the above, that a mute condition is reached can be avoided utmost. In such a way, the noise due to a muting on the way of the regeneration of a digital sound signal or prehold can be made hardly happening, hence the sound quality can be improved.