MPEG puts teeth into nothing; it has never done so, and it will never do so (nor does it have anything whatsoever to do with licensing terms, by the way). It was up to the ATSC to voluntarily conform to the full MPEG-2 specification; they choose not to do so (which as you point out was bad form on ATSC's part). By selecting a subset, they suffer the consequences in a world where others have chosen to be fully conformant, and MPEG-2 bitstreams cross DTV domain boundaries increasingly easily. -----Original Message----- From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On Behalf Of Craig Birkmaier Sent: Saturday, January 22, 2005 7:55 AM ... Conformance to the MPEG-2 standard would have been the best approach, but MPEG did not put any teeth into conformance. ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.