Course on Information Theory, Pattern Recognition, and Neural Networks by David MacKay.
From the description:
A series of sixteen lectures covering the core of the book “Information Theory, Inference, and Learning Algorithms (Cambridge University Press, 2003)” which can be bought at Amazon, and is available free online. A subset of these lectures used to constitute a Part III Physics course at the University of Cambridge. The high-resolution videos and all other course material can be downloaded from the Cambridge course website.
Excellent lectures on information theory, the probability that a message sent is the one received.
Makes me wonder if there is a similar probability theory for the semantics of a message sent being the semantics of the message as received?