Voiced/unvoiced decision using sequential decisions
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United States of America Patent
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May 13, 1986
Grant Date -
N/A
app pub date -
Sep 23, 1982
filing date -
Sep 24, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Speech signal is decided voiced or unvoiced by a sequence of unilateral decisions: a first test decides 'unvoiced' if standardized energy E.sub.s is below a threshold, or 'ambiguous' if above the threshold whereby a second test decides 'unvoiced' if the number of zero crossings ZC is above a threshold, and ambiguous if below the threshold. Up to six criteria may be so tested as ambiguous before a 'voiced' decision is made.
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