LPC-10

LPC-10, or LPC10 is a Linear Prediction Voice Vocoder that operates at 2.4 Kb/s.

The United State Federal Government has standardized many digital voice solutions over HF and VHF/UHF using this Vocoder and standardized as FED-STD-1015.

The ANDVT Family of secure voice terminals uses this vocoder for communications.

• So called LPC10 because 10 LP coefficients are used
• Bandwidth: 2.4kbps
• Samples/frame : 180 samples
• Bits/frame: 54 bits
• Frame Size: 22.5ms = 44.44 frames/sec
• Target stream : 8khz sampling rate, 16bit quantization

Also see:

• MELP
• Wikipedia:Secure Voice