6.2.1 General MDCT decoding

26.4453GPPCodec for Enhanced Voice Services (EVS)Detailed algorithmic descriptionRelease 15TS

MDCT based codec frames can be either encoded by the MDCT based TCX or the High Quality Coder. Which mode is actually used, is determined by table 76 in subclause 5.3.1. For those configurations where both modes are switched, a signaling bit determines the MDCT mode.