ITU-T Rec. G.722.1 Annex B (11/2000) Coding at 24 and 32 kbit/s for hands-free operation in systems with low frame loss... 
Summary
Source
FOREWORD
CONTENTS
Annex B - Floating-point implementation for G.722.1
B.1 Introduction
B.2 Algorithmic description
B.3 ANSI C code