VOC26

NAME

voc26 - SRUBANK style 26-channel vocoder

SYNOPSIS

voc26 (-i item) (-f) (-q nlevel) file

DESCRIPTION

voc26 is a straightforward implementation of a 26-channel filterbank analyser using two second-order section Butterworth bandpass filters spaced as in Holmes paper in IEE proceedings with SRU extensions at the low and high frequencies. Energy smoothing done at 50Hz to give default 100Hz framerate.

There is no limit to the length of the input signal.

Options and their meanings are:

-I Identify program and version number.

-i item Select input item.

-f Faster frame rate. Sample output at 200 frames/sec, filtering remains at 50Hz to avoid pitch pulses.

-q nlevels Quantise the output energies to 'nlevels'. The top 50dB of the signal is quantised.

INPUT ITEMS

SP Any speech signal sampled at greater than 20kHz.

OUTPUT ITEMS

CO Vocoder energies.

VERSION/AUTHOR

2.0 - Mark Huckvale

SEE ALSO

voc8(1), voc19(1)
Fri Jul 09 14:54:37 2004