1. Make the 700 bit/s codec sound better, to improve speech quality on
low SNR HF channels (beneath 0dB).
2. Develop a higher quality mode in the 2000 to 3000 bit/s range, that
can be used on HF channels with modest SNRs (around 10dB)
Add some examples if requested.
Add some test programs if requested.
N.B. PR is actually against comms/libcodec2 which is a duplicate port.
PR: ports/210186
Submitted by: takefu@
Codec2 is an open source low bit rate speech codec designed for
communications quality speech at 2400 bit/s and below. Applications
include low bandwidth HF/VHF digital radio and VOIP trunking. Codec 2
operating at 2400 bit/s can send 26 phone calls using the bandwidth
required for one 64 kbit/s uncompressed phone call. It fills a gap in
open source, free-as-in-speech voice codecs beneath 5000 bit/s and
is released under the GNU Lesser General Public License (LGPL).
WWW: http://www.rowetel.com/blog/?page_id=452
