
Adaptive Digital's enhanced-MELP (MELPe) is a low bit rate vocoder supporting
2400 and 1200 bps. It can operate at half the rate of the
MELP standard.
Enhancements include: Improved encoding/decoding, transcoding between 2400 and
1200 bps bit streams, and noise preprocessing for removing background noise.
MELPe provides better quality than all older military standards, especially in
noisy environments such as battlefield, vehicles and aircraft. MELPe is suitable
for use by OEM customers for VoIP, telecom, military, secure voice & radio,
and other low bit-rate compressed speech applications.
Data sheet: .pdf ![]()
Coding Rate: 2.4, 1.2 kbps
Sampling Rate: 8 kHz
Functions are C-callable
Multiple channel capable
ADT MELPe is available on the TMS320™ DSP Family
C54x™ DSP Generation
All Memory usage is given in units of 16 bit word.
Function |
MIPS |
Program Memory |
Data Memory |
Encode |
20.75 |
- |
- |
Decode |
17.4 |
||
| Encode + Decode | 38.15 | 12997 | 16245 |
| Noise Preprocessor (NPP) | 19.59 | 4376 | 9534 |
Last update: 05/17/2006
InitializeMelpEncoderChannel (. . .) Initializes the MELPe encoder
InitializeMelpDecoderChannel (. . .) Initializes the MELPe decoder
EncodeMelp (. . .) Executes the MELPe encoder
DecodeMelp (. . .) Executes the MELPe decoder
Military communications requiring a lower bit rate, used in narrow band channels.
SITE LINKS
HOMEVOCODERS
ADT 4800 ADT 9600 G.711 G.722 G.722.1 G.722.2 AMR-WB G.723.1 G.726 G.728 G.729, G.729 AB GSM AMR GSM FR LPC EVRC EVRC-B MELP MELPe SMV iLBCRELATED LINKS
G.168 NEC & LEC G.168 Lite G.168 EC CHIP 'C6424 G.168 EC CHIP 'C641x ACOUSTIC EC ACOUSTIC EC G2 LC IPP REFERENCE DESIGN DSP RESOURCE WIZARD