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2 votes
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AR Modeling: Why residual is white noise?

now if $\epsilon[n]$ was not white, we could do further LPC to make a good guess at $\epsilon[n]$ and make a better guess for $x[n]$, but if the coefficients $\epsilon[n]$ are optimal, then we can't make …
robert bristow-johnson's user avatar
1 vote

pitch extraction for speech

it's not "modern", but if done right, correlation methods are quite robust. i personally like Average Squared Difference Function (ASDF) $$ Q_x[n_0,k] = \frac{1}{2L+1} \sum\limits_{n=n_0 - \lfloor k/ …
robert bristow-johnson's user avatar
1 vote

Division by zero in Levinson–Durbin recursion?

of code from long ago: /********************************************************************** * * * Levinson-Durbin Algorithm for LPC … values * * * * output: * * a -> a[0] to a[n] LPC
robert bristow-johnson's user avatar
4 votes

What is the need for prediction filter in PCM and DPCM?

this is what linear predictive coding (LPC) is at the most fundamental. …
robert bristow-johnson's user avatar