HDTV bandwidth requirements
January 27, 2005
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Much has been made lately of the manufacturers of A/V receivers that feature "video upconversions" to component video and in particular "wide-bandwidth component-video upconversion" to facilitate HDTV resolutions (720p and 1080i). What is the minimum amount of bandwidth required to display HDTV resolutions?
Well, 720p HDTV, the most bandwidth-intensive format broadcast today, requires 37MHz of video bandwidth. So, in theory, any A/V receiver with more bandwidth than that will not affect the video quality of the high-def source. While manufacturers' bandwidth numbers may not be completely accurate or take into account the whole system, in practice, a receiver with 40MHz of switching or conversion bandwidth should preserve all of the source's information.
, a TV reviewer with five years' experience, has color bars and a resolution chart tattooed inside either eyelid.