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