Transmitter with an improved harmonic speech encoder
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United States of America Patent
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Jun 20, 2000
Grant Date -
N/A
app pub date -
Jul 13, 1998
filing date -
Jul 11, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a harmonic speech encoder (16) a speech signal to be encoded is represented by a plurality of LPC parameters which are determined by a LPC parameter computer (30), a pitch value and a gain value. The speech encoder comprises a (coarse) pitch estimator (38) for determining a coarse pitch, and a refined pitch computer (32) to determine a refined pitch from the coarse pitch value. The refined pitch value is determined in an analysis by synthesis way, in which a refined pitch value is selected which results in a minimum error measure between a representation of a synthesized speech signal and a representation of the original speech signal.
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