| 摘要 |
During encoding of voice frequency (VF) signal in a PCM channel bank the encoder encounters direct current (d-c) offset component resulting from the particular VF signal. Such d-c offsets cause errors above and beyond the normal errors inherent in the normal encoding process. The present invention alleviates this problem by providing an automatic d-c offset cancellation circuit which closely follows the d-c offset component and provides a d-c component of opposite sign to cancel it.
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