What happens to my existing analog TV set?
Free-to-air broadcasters will simulcast (ie, broadcast both analog and digital signals) for at least eight years in an area, so metropolitan viewers will continue to be able to use current analog television sets to receive broadcasts without the need for a set top box until at least the end of 2008.
After the end of simulcasting in an area, the addition of a digital set top box will allow viewers to receive and display digital transmissions on their analog TV sets.
Viewers using set top boxes will be able to receive other features of digital, such as sharper pictures, clearer sound and extra channels. However, as most existing analog sets have a 4:3 screen aspect ratio (shape), using a digital set-top box with a 4:3 analog television set may affect the way widescreen transmissions are displayed. Use of a widescreen analog display will enhance the digital experience.
The full picture quality benefits of digital television, including High Definition pictures, will require a High Definition digital receiver that is capable of receiving High Definition transmissions and a screen that is capable of displaying the HD television signal.