AAC beaten at low bitrates, why? Reply #50 – 2002-08-08 00:20:51 QuoteOriginally posted by Frank KlemmSubband coding is NOT patented. Read patents very very carefully or don't read it.Perceptional noise substitution is also NOT patented.When reading patents it is necessary to find out what is EXACTLY patented.Sorry, I am not able to understand documents where a large amount of the sentences spans more than 40 lines of text. Those of you who can, can read the patent here http://www.depatisnet.de. English pages are available. Search for Patent "EP 0400755 B1". After reading parts of the description and of the claims, I don't see why musepack does not fall under this patent. Please don't tell me to read the whole thing (and understand it ). Are you aiming at the transmitter/reciever part? Imho this is covered in the claims.Usually a court will decide what exactly is patented or not .What is the difference between the mechanisms described in the patent and the ones implemented in mpc?Where does mpc use patents then?