4.8 Kbps CELP Coder 􀂄 Each frame is divided into 4 subframes. In each subframe, the codebook contains 512 codevectors. 􀂄 The gain is quantized using 5 bits per subframe. 􀂄 The LSP parameters are quantized using 34 bits s

The low­ level speech compression algorithm of the GSM suite is called GSM 06.10 RPE­ LTP (Regular­ Pulse Excitation Long­ Term Predictor). My colleague Dr. Carsten Bormann and I have implemented a GSM 06.10 RPE­ LTP coder and dec