A New Channel Bank with Block Companding
K. Niwa, Takashi Araseki, A. Tomozawa · IRE Transactions on Communications Systems · 1982
Performance improvement of the nearly instantaneous companding PCM (or block companding PCM) is discussed. A simplified algorithm is proposed. The design and performance of a channel bank adopting the proposed algorithm is described. The channel bank can transmit 44 voiceband signals on a standard T1 line. It provides commercially acceptable speech quality as well as sufficient transparency for voiceband data up to 4800 bits/s.