Should I use MELP rather than MELPe for legacy compatibility considerations?
At 2400 bps the MELPe and MELP uses a similar bit format, therefore a MELPe synthesizer would produce better quality speech than the MELP synthesizer for the same bit-stream. In other words, even if you communicate with a MELP based legacy device, you will improve the speech quality by utilizing a MELPe based new device on your end. So we would certainly recommend using MELPe rather than MELP. Furthermore, combining Compandent’s MELPe++ in a system that already uses MELP (or even MELPe standard reference) on the other end is likely to improve quality on both ends! (compared to MELP or MELPe standard reference on both ends) 5.3 Q: Does MELPe have higher delay than MELP? and What is the MELPe delay? A: At 2400 bps both MELPe and MELP have the same delay. The encoder (algorithmic) delay of MELPe is 42.625ms, 103.75ms and 126.25ms for the 2400, 1200 and 600 bps MELPe, respectively. The total end-to-end delay depends on how one computes it, and that may vary among different networks having
