 The G.729.1 output bandwidth is 50–4000 Hz at 8 and
12 kbit/s, and 50–7000 Hz from 14 to 32 kbit/s.G.729.1 is also known as G.729 Annex J and G.729EV where EV stands for Embedded Variable (bit rate).The G.729.1 algorithm is based on a three-stage coding structure