Linear prediction analysis
To actually calculate the LPC coefficients, the idea is very simple:
for each frame (of 5–10 ms duration) we need to find parameters, a
1 to ap such that the error term e[t
] is as small as possible. However, to put this into practise requires a
knowledge of mathematics beyond the level of this course (see Schroeder
1985: 55–6 for the details). And in general, we do not need to understand
the method in order to use it in practise. See my demonstration program lp_analysis.m, which needs the lpc.m script, which itself
requires the Octave signal
package to be installed and loaded.
Next: Applications of LP analysis