I cannot find a document to prove that the MPEG4 SP codec used in DM355 is free to use and if it's so.
Searching around I found a link that assert that is not necessary to pay royalties for small production quantities (< 50.000 pieces per year) [http://processors.wiki.ti.com/index.php/DM355_Codecs]. Other sources assert that royalty is included in DM355 price.
Could I receive a certain answer, maybe with a document from TI that prove it?
Bests
Matteo Pucci