re do we need the clipper for cheap security gtoal gtoal com graham toal writes can someone tell me if hardware compression is or is not needed to run digital speech down k i think it is i ve heard it s not lets say bit samples would raw data at the corresponding sampling rate be usable if not how fancy does the compression need to be it s all easy with a dsp the olivetti quaderno for example great kg subnotebook palmtop pc sorry for the plug folks but olivetti don t seem to be doing a good job marketing it themselves includes sound digitisation hardware they provide vocoders for their dsp which produce varous bit rates there s one which gives pretty acceptable voice quality at kbit sec just right for a v bis modem their dsp can play and record at the same time too so you wouldn t need to play two way radio you can also download code to the dsp subunit though you d need a software development kit for the dsp in question dunno which it is if you wanted to produce your own vocoder for say v speeds paul paul ducklin duck nuustak csir co za csir computer virus lab box pretoria s africa
