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My Hitachi 51F510 can only toggle between 1080i and 540p. 720p not possible?

synce
05-23-2005, 03:38 PM
Can anyone help out? I want to know what this means exactly. Does it mean that the highest progressive resolution the TV can support is 540? And does it mean that it also supports all progressive resolution up to 540? I'm very new to the HD scene. A little bit of help would be appreciated. :)

greatgman
05-23-2005, 04:37 PM
i got the same model
what you are confused about is this :
540 p and 1080 i are the tv's VIRTUAL RESOLUTION (not true hd)
to get 720 you need to go full digital via the hdmi input
:o

Smthkd
05-23-2005, 05:24 PM
i got the same model
what you are confused about is this :
540 p and 1080 i are the tv's VIRTUAL RESOLUTION (not true hd)
to get 720 you need to go full digital via the hdmi input
:o
No actually, the Virtual HD on this model like the others is 1080p, which just means it upconvert all incoming signals to 1080p then downconvert it to the native resolution of the set. In this case the native resolution of this CRT based HD set is -1080i. Anyway, your HDtv will accept all the following signal (1080i/720p/480p/480i Input Compatible) but will convert them to either 1080i (for all HD signals) or 540p (for all ED signals usually 480i and 480p) - depending on which you choose!
......540 p and 1080 i are the tv's VIRTUAL RESOLUTION (not true hd)

This statement is only half correct. As mentioned above your VirtualHD is 1080p but down converts to the native resolution. On the other hand 540p isnt true HD, if fact its still consider ED resolution, however 1080i is true HD in fact from the CRT unit you are talking about it has a resolution capability of 1920 x 1080i! But I think he means that you will get true HD in the if you use the HDMI input. You will get a digital to digital feed unlike the component inputs which are digital to analog!

synce
05-23-2005, 06:26 PM
Okay, that helps a lot. Thank you :yippee:

RSawdey
05-24-2005, 11:33 AM
Virtual HD is VIRTUAL... it doesn't exist in reality, just in video memory... it's just an upconversion technique.

The TV's ACTUAL native resolution is 1080i/30. 540p is just an old trick to create a psuedo-progressive mode by putting the same data into both fields. Video games have done the same for ages, creating 240p on a NTSC TV. TV's don't accept "all progressive resolution up to 540" - they are NOT multisync devices like PC monitors. They only accept certain standard formats, 480i, 480p, 1080i, 720p. 960 x 540p is a special case 'trick'.

HD signals must be carried over an HD capable connection, but being digital has nothing to do with it... equally high resolutions can be carried by HDMI, DVI, HD Component, and VGA. This TV can NOT produce 720p/60. If it can accept the signal, it must be format converted for display. TVs that support 720p/60 must have much faster electronics, part of the reason they cost more.

leshabitants24
05-24-2005, 02:12 PM
i think rsawdey has just about wapped it up eh boys and girls. i enjoy his posts.

RSawdey
05-25-2005, 04:01 PM
:D WAP! Dat wascalwy wabbit... :D

JCM
12-26-2005, 12:19 PM
I've had a 51F510 for a year now, and have always been confused about this Virtual HD business. Rsawdey's answer defogged some of the mystery for me, but I'd appreciate it if he spelled things out a little more.

He says the Hitachi's Virtual HD processor puts 540p into "both fields." Is it correct to say he means that, when the Hitachi is set to display 540p, instead of painting a different set of 1080 lines every 30th of a second, it is painting the same 540 lines twice very 30th of a second? While that is a trick that would bother a purist, wouldn't it effectively produce 1080p every 30th of a second? That wouldn't be as good as 1080 every 60th of a second, which is what you get with true 1080p, but maybe it's good enough to avoid jagged lines in fast action most of the time?

I have to say that I have rarely observed jagged lines on my Hitachi even when set at 1080i. Either I'm not very observant (a distinct possibility), or the phenomenon doesn't happen often in practice.

Now here's another issue: I'm considering the purchase of an upconverting DVD player with an HDMI output. The 51F510 upconversion circuitry does a stellar job, in my opinion, so my main justification is to get use of my TV's HDMI input. I'm hoping that I would then be able to use the TV's two component inputs for my Dish 811 and my Xbox. The Xbox currently uses a composite input, and the image quality sucks. I'd like to make use of the Xbox HD accessory, which makes use of component cables and an optical digital cable.

Here's my second question: this means connecting two devices to the Hitachi's Input 1, which covers both the HDMI input and one of the component inputs. Will that work as long as one of those devices is switched off while the other is on? (It's pretty obvious you can't have two devices connected to the same input at the same time if both are on.) I recall reading a while back that the TV will ignore one of the devices when there is a signal from both, but I'm not sure what would happen if there is a signal from only one but two are connected.

Has anybody ever tried this?