the excitation function being an excitation gain (G10L25/90 takes precedence)

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Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis (in musical instruments G10H) > using predictive techniques > Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters > the excitation function being an excitation gain (G10L25/90 takes precedence)