All:
ARRL and TAPR 2011 Digital Communications Conference videos are
available to
view for free at
http://arvideonews.com/dcc2011/index.html
Of particular note, take a look at the open source codec2 speech codec
presentation by David Rowe, VK5DGR at
http://arvideonews.com/dcc2011/2011_DCC_CODEC_2.html
Thank you,
David, W2LNX