1080i vs 720p


If one has a 720p projector which can output at 1080i, is it better when using regular dvd source or HDTV to watch in 1080i or use my Faroudja processor and watch in 720p, technically speaking that is.
jcbower

Showing 2 responses by kijanki

Cerrot - HDTV programs change format many times being transfered between stations. Standard OTA HDTV signal is digital and compressed to fit 6MHz bandwidth slots. No matter what this signal is my DLP TV always converts it to own TV format where individual pixels of the same color are addressed at once - then next color comes etc. 90 times a second (like color interlacing). Even frequency of update - 90Hz suggest that it has nothing to do with 60Hz interlacing. Other displays like plasma or LCD are perhaps simpler and address each individual pixel - whole screen at once. Screen resolution and update rate are arbitrary and can be rescaled. New Samsung LCD TVs rescale update rate (and approximate pixels) to 120Hz providing more fluid motion.

My TV has 720x1280 pixels resolution. With higher resolution amount of detail would be the same since it is limited by the bandwidth.
"no flat panel TV today actually displays a 1080i signal. They all buffer 1080i and display 1080p."

True, but if they would then 720p should be better in spite of lower resolution, since eye is extremely sensitive to horizontal misalignment.