Method and apparatus for intelligible fast forward and reverse playback of time-scale compressed voice messages
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United States of America Patent
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Oct 27, 1998
Issued Date -
N/A
app pub date -
Oct 17, 1997
filing date -
Feb 28, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for providing intelligible fast forward and reverse playback of messages which include time-scale compressed speech using a time scale modification technique. A receiver (2604) receives (2902) a message including speech compressed at a predetermined compression rate and a message rate identifier which identifies the predetermined compression rate which are then stored in a memory by a processor (2610). The processor (2610) processes (2912) the stored message to time-scale expand the compressed speech at an expansion rate that is equal to the predetermined compression defined by the message rate identifier so as to produce a normal speech playback speed. The processor (2610) also processes (3000, 3100) the stored message to time-scale expand the compressed speech at an expansion rate that is lower than the predetermined compression rate defined by the message rate identifier, so as to produce a perceptibly increased speech playback speed.
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