Fig. 3From: Fast fundamental frequency determination via adaptive autocorrelationCalculated characteristics of the AAC algorithm based on DB2. Left: lines with circles (o) show the gross error rates for a 45-ms segment length without filtering (dotted line) and using band-pass filtering (dashed line). Solid lines show the results with band-pass filtering and frequency shaping for a 20-ms (•), a 45-ms (o), and a 70-ms (+) segment length. The exponential peak detector function has been used for all measurements. Right: comparison of the performance of the exponential peak detector (exp. PD) function (solid lines) to a simple constant threshold peak detector (thresh. PD, dotted lines) for 20-, 45-, and 70-ms segment lengths. Scales for the left and the right plots differBack to article page