AUDIO SIGNAL DEMODULATION CIRCUIT

摘要

PCT No. PCT/JP89/01088 Sec. 371 Date Aug. 6, 1990 Sec. 102(e) Date Aug. 6, 1990 PCT Filed Oct. 14, 1989 PCT Pub. No. WO90/04890 PCT Pub. Date May 3, 1990.An audio signal demodulating circuit comprises a counter circuit (11) for detecting the number of samples for which interpolation is to be successively made by counting the output from an error correction circuit (2) and an AND circuit 10 for taking the logical product of the output from the counter circuit and the mute signal generated when synchronization has been lost. If interpolation is to be successively made for m (integer) or more, an audio differential signal is muted using a mute signal so as to remove the signal with greatly deteriorated audio quality. This can remove large audio distortion generated if interpolation is only successively made for error correction when errors successively occur for samples.