A digital audio signal demodulation circuit comprises a synchronous detection circuit (18) and a muting circuit (17) for muting the output from an interpolation circuit (16) using a synchronization lock signal generated from the synchronous detection circuit (18) when synchronization has been lost. The differential signal output from the interpolation circuit (16) is muted by the muting circuit (17) and thereafter integrated by an integration circuit (19). Thus, an audio signal with high sound quality can be demodulated without producing interruption noise even when synchronization has been lost or forcible muting is done.
申请公布号
US5363384(A)
申请公布日期
1994.11.08
申请号
US19930164996
申请日期
1993.12.10
申请人
MATSUSHITA ELECTRIC INDUSTRIAL, CO., LTD.;NIPPON HOSO KYOKAI