Mr Blackley said about 30 per cent of Australian homes had free-to-view digital television, but "on encouraging further adoption, as an industry we still have a job to do", he said.
Ten said this week it would launch high-definition digital broadcasting on a new channel, Ten-HD, on December 16.
The channel will feature more than 50 hours weekly of programs that cannot be seen on the existing Ten channel, including some sport streamed from the US, and documentaries.
Mr Blackley predicted that up to 20 per cent of consumers would be able to access HD channels by Christmas.
"Estimates of the number of HD-enabled households range from 15 per cent to possibly 20 per cent by Christmas," he said.
Mr Blackley's figures include not only viewers with an HD television, but those with an HD set-top box that enables them to view channels such as Ten-HD on an older television.
He sees set-top boxes as a key to encouraging viewers to switch over to digital. "These receivers cost just a couple of hundred dollars and the price will continue to decline," he said.
The Australian Digital Industry Suppliers Forum predicts there will be at least one HD TV in a majority of Australian homes within five years.
Full Story by Nick Tabakoff Australian November 23, 2007