as PDC-EFR: CS-ACELP 8 kbit/s (a.k.a. NTT DoCoMo Hypertalk) and ACELP 6.7 kbit/s (a.k.a. J-PHONE Crystal Voice).

The PDC-EFR CS-ACELP uses G.729. The PDC-EFR ACELP is compatible with the AMR mode AMR_6.70.

PDC-HR

PDC Half Rate is a speech coding