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A single-chip controller for digital answering machines

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2 Author(s)
Intrater, G. ; National Semiconductor Ltd., Herzelia, Israel ; Falik, O.

A single-chip controller for digital answering machines is introduced. Only two other devices, an audio quality DRAM (ARAM) and a codec, are needed to implement all the digital parts of such an answering machine. The device performs voice compression and decompression algorithms, dual-tone multifrequency (DTMF) detection, voice synthesis, and control functions of digital answering machines

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:39 ,  Issue: 1 )