| 摘要 |
PURPOSE:To eliminate glitch by using a switching control signal having a fre quency being an integral number of multiple (>=twice) of a sampling frequency of a digital data to be converted so as to apply ON/OFF control to a switch circuit for deglitch. CONSTITUTION:A digital signal processing circuit 1 de-interleave an incoming recovered data, applies error correction and separates the result into L, R chan nel audio data LAD/RAD, which are given respectively to digital/analog conver sion circuits 2 and 3. Switch circuits 4 and 5 are subjected to ON/OFF operation at a frequency being twice the sampling frequency, outputs PAM signals LPAM/ RPAM not including the effect of the glitch caused by digital/analog conversion, they are smoothed by low-pass filters 6, 7 and outputted as audio signals LAUD/ RAUD.
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