Original sentence: As an SMPTE standard, VC-1 is open to implementation by anyone, although implementers are hypothetically required to pay licensing fees to the MPEG LA, LLC licensing body or directly to its members, who claim to hold essential patents on the format (since it is a non-exclusive licensing body).Windows Vista partially supports HD DVD playback by including the VC-1 decoder and some related components needed for playback of VC-1 encoded HD DVD movies
Edited sentence: As an SMPTE standard, VC-1 is open to implementation by anyone, although implementers are hypothetically required to pay licensing fees to the MPEG LA, LLC licensing body or directly to its members who hold essential patents on the format (since it is a non-exclusive licensing body).Windows Vista will partially support HD DVD playback by including the VC-1 decoder and related components needed for playback of VC-1 encoded HD DVD movies