Overview and performance of CCITT/ANSI embedded ADPCM algorithms

Simulation platform for the planning and design of networks carrying VoIP traffic

“…The core bits are used in the prediction process, both in the encoder and the decoder, while the enhancement bits reduce the quantization noise in the reconstructed signal. Thus, while the core bits must reach the decoder to avoid mistracking, the enhancement bits can be dropped to alleviate congestion [33].…”