TRANSMITTER WITH AN IMPROVED HARMONIC SPEECH ENCODER

摘要

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. This determining of a refined pitch value is done 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 synthetic speech signal and a representation of the original speech signal.