What are some good resources for learning about DSP (including the mathematics and algorithms necessary for actually understanding these resources)?
Let's assume that my math skills are rusty from lack of use as well, so a roadmap along the lines of:
would be nice and hopefully result in DSP skills and knowledge approaching "competent".
A Beginner's Guide to Digital Signal Processing
As well as the The Scientist and Engineer's Guide to Digital Signal Processing By Steven W. Smith, there is also the excellent Understanding Digital Signal Processing