Mixed Excitation Linear Predictive (MELP) Vocoders

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MELP and MELPe are vocoders used in military applications, satellite communications, and secure voice devices.
MELP was invented by Alan McCree in 1995 and standardized as MIL-STD-3005 in 1997.
MELPe is an enhanced version of MELP, offering better quality and lower bit rates (2400, 1200, and 600 bit/s).
MELPe was adopted as NATO standard STANAG-4591 in 2002 after extensive testing.
MELPe outperformed other vocoders like HSX and SB-LPC in NATO testing.
MELPe includes features like noise preprocessing, improved encoding/decoding, and new postfilters.
MELPe is used in secure communications, VoIP, and cellphone applications.
MELPe is subject to IPR licensing from companies like Texas Instruments, Microsoft, and Thales Group.
Secure communications using MELPe include SCIP-210 and TSVCIS protocols.
MELPe supports variable data rates and includes FEC for error resilience.

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