Voice Transmission at 6000 Bits Per Second Using Delta Modulation.
Elias Emmanuel Padouvas · Defense Technical Information Center (DTIC) · 1979
Digital systems are of major importance in modern communications. This research investigates the minimum clock (bit) rate of a commericially available delta modulator/demodulator needed to transmit intelligible voice signals. Intelligible voice and music signals were recovered using a clock rate as low as 6 Kbits/sec. (Author)