DISPOSITIF DE CODAGE A INTERPOLATION

摘要

An interpolative encoder for a subscriber line audio processing circuit including an interpolative analog-to-digital converter as shown in Fig. 9 for converting an input analog signal to a digital signal including a series of multi-bit binary words each consisting of all 0's or a series of one or more 0's and a series of one or more 1's, logic circuitry (150) for converting each multi-bit binary word into a modified binary word having a new binary format consisting of either all 0's or a single 1 and a plurality of 0's such that the value of each modified word is equal to the value of the corresponding multi-bit word converted such that the least significant bit thereof is doubled and made equal to the second bit in value, and a digital filter as shown in Fig. 17 for filtering the series of modified words.