As I recall, a lot of the coding inefficiencies with interlace were suffered because industry undertook brute force coding methods in order to avoid having to take license under a Columbia University patent. Al ---------------------------------------------------------------------- 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.