G.711.1 is defined in ITU-T Recommendation G.711.1: “Wideband embedded extension for G.711 pulse code modulation”
G.711 is an embedded wideband speech and audio coding algorithm operating at 64, 80 and 96 kbit/s.
When sampled at 16 kHz, the output of the G.711.1 coder can encode signal with a bandwidth of 50-7000 Hz (wideband) at 80 and 96 kbit/s, and for 8-kHz sampling, the output may produce signal with a bandwidth ranging from 50 up to 4000 Hz, operating at 64 and 80 kbit/s. At 64 kbit/s, G.711.1 is compatible with G.711, hence an efficient deployment in existing G.711 based Voice over IP (VoIP) infrastructures is foreseen. The coder operates on 5 ms frames, has a maximum algorithmic delay of 11.875 ms.
The encoder produces an embedded bitstream structured in three layers corresponding to three available bit rates: 64, 80 and 96 kbit/s. The bitstream can be truncated at the decoder side or by any component of the communication system to adjust the bit rate to the desired value.For licensing IPR, please contact www.sipro.com