Sony KP-51WS510 - 720p Questions

Shane Morales

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Does anyone know why this model down converts 720p to 480p? It will take 720p, but for some reason it downconverts to 720p. Is that normal for a CRT rear projection? Any comments on this?

Also, is it true that you can have your HD cable box spit out either 720p or 1080i? Or is it one or the other? Which one is it?
 

Andy_Hamric

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I don't have an OTA Hi-Def tuner box, but from what I read it looks like you can set the output to 720p or 1080i. Not sure if the cable box you mention is the same.

I have the 46" Sony and the manual (for all the TVs in this series) clearly states that 720p is downconverted to 480p (see page 41). I could be wrong but I think this is not that uncommon for non-native 720p sets. Seems silly to me, but then if you have a box doing the conversion to 1080i instead of your TV it's all the same. It has a 2:3 pulldown but my DVD does that so I don't use the feature.
 

ChrisWiggles

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That is relatively normal. 480p and 1080i are roughly equivalent in terms or horizontal scanrate, 720p needs a lot lot more bandwidth, etc.

also, fyi: CRT projection displays do not have "native" resolutions.
 

Jason GT

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Re: HD Cable Boxes -

AFAIK this varies from box to box. For example, the box that I have can output all stuff either @ 1080i or 720p (the box itself performs any conversions).

I understand that others may be able to pass a native signal, and IIRC some of the old SA boxes can only output 1080i. Not being a SA user I cannot confirm, however.
 

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