Method and apparatus for identifying speech in telephone signals
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United States of America Patent
Stats
-
Dec 18, 1990
Grant Date -
N/A
app pub date -
May 15, 1989
filing date -
May 15, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for identifying telephone signals which are produced by a human voice. The method includes determining a measure of the energy of predetermined frequency bins of the frequency spectrum of the signal for a frame comprised of a predetermined number of consecutive samples of the signal, if the signal is an analog signal; averaging the measure of the energy of the predetermined frequency bins over a predetermined number of frames to provide a frame group average energy measure; determining the sum of the absolute value of the difference between the frame group average energy measure for all pairs of frame groups which are consecutive in time; and comparing the sum with a predetermined amount to identify the signal as having been produced by a human voice if the sum exceeds the predetermined amount.
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