


VOC26(SFS1)       MISC. REFERENCE MANUAL PAGES        VOC26(SFS1)



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 Butter-
     worth bandpass filters spaced as  in  Holmes  paper  in  IEE
     proceedings with SRU extensions at the low and high frequen-
     cies.  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.

     -iitem     Select input item.

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

     -qnlevels  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)

SOURCE
     /ptemp/mark/sfs/ucl/voc26.c












SFS                     Last change: UCL                        1



