gsm: gsm (Shared libraries for GSM speech compressor) gsm: gsm: Contains runtime shared libraries for libgsm, an implementation of gsm: the European GSM 06.10 provisional standard for full-rate speech gsm: transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse gsm: excitation/long term prediction) coding at 13 kbit/s. gsm: gsm: gsm: gsm: gsm: