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5  Functional description of the encoderPDF-p. 25
5.1  Common processing
5.1.1  High-pass Filtering
5.1.2  Complex low-delay filter bank analysis
5.1.3  Sample rate conversion to 12.8 kHzPDF-p. 27Up
5.1.4  Pre-emphasis
5.1.5  Spectral analysisPDF-p. 30
5.1.6  Bandwidth detectionPDF-p. 32
5.1.7  Bandwidth decisionPDF-p. 34Up
5.1.8  Time-domain transient detectionPDF-p. 37
5.1.9  Linear prediction analysisPDF-p. 38
5.1.10  Open-loop pitch analysisPDF-p. 43
5.1.11  Background noise energy estimationPDF-p. 52
5.1.12  Signal activity detectionPDF-p. 68
5.1.13  Coding mode determinationPDF-p. 90
5.1.13.1  Unvoiced signal classificationPDF-p. 91
5.1.13.2  Stable voiced signal classificationPDF-p. 96
5.1.13.3  Signal classification for FEC
5.1.13.4  Transient signal classificationPDF-p. 99
5.1.13.5  Modification of coding mode in special casesPDF-p. 100
5.1.13.6  Speech/music classificationPDF-p. 101Up
5.1.14  Coder technology selection

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