Evidently no system proponent was willing to give up his format, so all were included. Curiously, the interlaced systems, which had used 960x1408 and 960x1440 in the initial tests, when combined into one, were raised to 1080x1920, thus reviving the NHK system as the natural production standard and providing a potential market for the production equipment already developed by Japanese companies. Foremost among the interlace advocates were Sony, ATSC, the Grand Alliance, and North American Philips. P requires more bandwidth or channel capacity than I for the same resolution. We have to have interlace so that we can have cheaper receivers.
P raises costs for broadcasters.
Many programs that will be used for SDTV transmission already exist in NTSC format. Every one of these arguments proved to be false. There were so many misstatements of facts in these four submissions that I felt obliged to submit a detailed rebuttal for each. In the case of ATSC and Philips, I attempted to get knowledgeable persons known to me in those organizations to deal with my objections, but no response was ever forthcoming. In this short piece, there is insufficient space for presenting the detailed rebuttal of these erroneous statements.