DIGITAL TO ANALOG CONVERTER FOR A COMMUNICATION SYSTEM

摘要

A communication system converts compressed pulse code modulated(CPCM) signals into linear delta modulated (LDM) signals. The CPCM signals are converted into lower speed linear pulse code modulated (LPCM) signals. Higher speed LPCM signals are formed which are pairs of repeated ones of the lower speed LPCMsignals. The higher speed LPCM signals are averaged by a digital filter and thencompared to a generated signal for providing LDM signals.