Telephone answering machine having solid state and magnetic tape

Details Telephone answering machine having solid state and magnetic tape Telephone answering machine having solid state and magnetic tape

1987-10-19

1990-09-25

Faber, Alan

Telephonic communications

Audio message storage, retrieval, or synthesis

Dynamic audio signal recording or reproduction

379 88, H04M 165

Patent

active

049598520

ABSTRACT:
A telephone answering machine having solid state storage of an outgoing announcement (OGA) is improved by magnetic tape apparatus 120 for providing backup protection of the OGA in the event of a power failure. Also stored on the magnetic tape is the time duration of the OGA. Analog to digital conversion of the OGA, for storage in Dynamic Random Access Memories 210, 220 and 230, proceeds at a sampling rate that is inversely proportional to the time duration of the OGA to assure that the available memory space is fully utilized.

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Digital Coding of Waveforms, pp. 408-415, Prentice-Hall, Inc. 1984, N. S. Jayant and Peter Noll.

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