M-lcelp Speech Coding at Bit-rates Below 4kbps

This paper presents the M-LCELP (multi-mode Learned Code Excited LPC) speech coder, which has been developed for submission to the competition for setting the North American standards for half-rate digital cellular systems. The MOS subjective test shows that 4.075kbps M-LCELP synthetic speech quality is high, equivalent to that of a 8kbps VSELP full-rate coder.