ARM, RISC-V контроллеры

Там вроде все написано http://www.hawksof …hawkvoice/codecs.shtml

Here are some performance results for fixed point codecs on a Pocket PC with a PXA250 400MHz X-Scale (ARM) CPU using the long 25 second voice sample above:

CPU cycles per second for 8KHz sample rate sound.

              encode      decode
LPC-10:       19.0M       13.2M
OpenLPC 1.8K:  8.1M        9.8M
OpenLPC 1.4K:  8.2M        9.8M

Что касается размеров кода и ОЗУ - проще откомпилировать да на симуляторе прогнать. Есть еще один интересный проект по сжатию речи - http://www.ilbcfreeware.org/ iLBC (internet Low Bitrate Codec) is a FREE speech codec suitable for robust voice communication over IP. The codec is designed for narrow band speech and results in a payload bit rate of 13.33 kbit/s with an encoding frame length of 30 ms and 15.20 kbps with an encoding length of 20 ms. The iLBC codec enables graceful speech quality degradation in the case of lost frames, which occurs in connection with lost or delayed IP packets. http://www.ietf.org/rfc/rfc3951.txt - исходник кодека :)) http://www.ilbcfre …ware.org/software.html