Ja, methinks (or wethinks) you are confoozing a PV decoder package with the PV branded hardware functions. Nvidia is unlikely to offer those A/V decoders for free because they must at least pay royalties to various companies and organizations for them (Dolby, DTS, MPEG-LA) and unlike arch-nemesis AMD, they don't sell cards to end-users so cannot even include or otherwise account for an overall license being tied to each part -unless they did something wacky like paid per GPU sold which would lead to financial ruin.
As an aside, the PV decoder is not worth it. PowerDVD Super Duper Ultra Mondo Edition can be had for $30 or so with an upgrade from the OEM included with many burners (or available seperately for a pittance). With that you get the same olde timey MPEG-2, plus MPEG-4 AVC and even more audio decoders all useable from any DirectShow player.