CONTENTS

 1     Introduction
        1.1     Scope
        1.2     Bit rates
        1.3     Possible input signals
        1.4     Delay
        1.5     Speech coder description
 2     Encoder principles
        2.1     General description
        2.2     Framer
        2.3     High pass filter
        2.4     LPC analysis
        2.5     LSP quantizer
        2.6     LSP decoder
        2.7     LSP interpolation
        2.8     Formant perceptual weighting filter
        2.9     Pitch estimation
       2.10     Subframe processing
       2.11     Harmonic noise shaping
       2.12     Impulse response calculator
       2.13     Zero input response and ringing subtraction
       2.14     Pitch predictor
       2.15     High rate excitation (MP-MLQ)
       2.16     Low rate excitation (ACELP)
       2.17     Excitation decoder
       2.18     Decoding of the pitch information
       2.19     Memory update
       2.20     Bit allocation
       2.21     Coder initialization
 3     Decoder principles
        3.1     General description
        3.2     LSP decoder
        3.3     LSP interpolator
        3.4     Decoding of the pitch information
        3.5     Excitation decoder
        3.6     Pitch postfilter
        3.7     LPC synthesis filter
        3.8     Formant postfilter
        3.9     Gain scaling unit
       3.10     Frame interpolation handling
       3.11     Decoder initialization
 4     Bitstream packing
 5     ANSI C code
 6     Glossary