Digital Signal Processing DSP Overview study documents Well, I couldn't find better expression to say what I want :(

I'm looking for a DSP study source, that doesn't dive too deep, and covers "all" or most of DSP topics, I just want to have an overview of it, then, as a next step, it will be easier to go deeper.

A PDF file, an online file, video course, tutorial, ... I french we say "Résumé de cours" or "course summary" but it didn't give me what I expected!

Plz, for those having no answer, plz, tell me how to ask about it and google it

Thanks in Advance
There are some books (some free) that cover most DSP topics with a claim of easy approach, probably they cover the most important fundamentals:

1- Understanding Digital Signal Processing_R.Lyons

2- Scientist and Engineer's guide to DSP_S.W.Smith (free from web)

3- Signal Processing First_McClellan