Title :
On the estimation error associated with the autocorrelation method LPC estimate
Author :
Attili, Joseph B. ; Anderson, John B. ; Savic, Michael
Author_Institution :
PAR Technol. Corp., New Hartford, NY, USA
Abstract :
The performance of the autocorrelation method of analysis is evaluated along with the effects that certain attributes (e.g. frame length, etc.) have on this performance. Theoretical lower bounds on the mean-square estimation error are derived for linear productive coding (LPC) coefficients and for the vocal-tract filter gain. It is shown that a significant amount of the variability of measured parameters from real speech is due to estimation uncertainty. A speaker recognition experiment is conducted to demonstrate that better recognition accuracy can be achieved by using longer frame lengths.<>
Keywords :
coding errors; correlation methods; encoding; filtering and prediction theory; speech analysis and processing; speech recognition; LPC coefficients; LPC estimate; autocorrelation method; estimation uncertainty; frame length; linear productive coding; lower bounds; mean-square estimation error; measured parameters; recognition accuracy; speaker recognition experiment; vocal-tract filter gain; Autocorrelation; Equations; Estimation error; Filters; Linear predictive coding; Performance analysis; Robustness; Speaker recognition; Speech analysis; Speech enhancement;
Conference_Titel :
Communications, 1988. ICC '88. Digital Technology - Spanning the Universe. Conference Record., IEEE International Conference on
Conference_Location :
Philadelphia, PA, USA
DOI :
10.1109/ICC.1988.13820
