5.2.3 Excitation coding

5.2.4 Bass post-filter gain quantization

5.2.2 LP filter coding and interpolation

5.2.1 Perceptual weighting

5.2.5 Source Controlled VBR Coding

5.1.11 Background noise energy estimation

5.1.13 Coding mode determination

5.1.12 Signal activity detection

5.2 LP-based Coding

5.1.14 Coder technology selection