I thought I heard somewhere along the line that the Chinese were using turbo coding in their VSB transmissions, which in theory should bring performance close to the Shannon limit. If this be so, then their VSB is quite a different animal from 8VSB. Does anybody know if coding theorists have been trying turbo or LDPC coding techniques with COFDM? 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.