What kind of wide screen projector should be used?
Besides the points mentioned above, projectors differ in their ability to use different video sources: some are video only projectors, some are DATA (computer) projectors and some have both features, but these are obviously more expensive. DATA only projectors can use video as the source, by employing a device called “line-doubler”, which raises the scan frequency and doubles the video lines so the resulting signal resembles a computer DATA signal. The opposite, using a video only projector for computer DATA presentation, is also possible. This setup requires a scan converter that converts high frequency computer signals to video. This approach is limited in comparison to the one mentioned above because computer data is easily converted to video if the DATA scan rate is 640×480. In PAL, scan rates of 800×600 may also be converted to video, with minimal loss, but higher scan rates and resolutions, such as 1024×768 or 1280×1024, when converted to video, result in a tremendous loss of res
