Blu Ray resolution question

GuruJockStrap

GuruJockStrap

GuruJockStrap

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Managed to grab a Sony BDP S360 in the sales and have a quick question regarding resolution.

The player is hooked up to my Sony KDL 32V4000 via HDMI.

Now, during the auto setup the on screen graphics state that the output resolution is 1080i.

No way my TV is displaying that as the max is 1366 x 768.

I assume the scaler in the TV is down-scaling the 1080i output to 1366 x 768?

Is it best to set the player to output 720p so the TV has to do little scaling or leave it as it is? Thinking what would be best for image quality.
 
When a 24, 25 or 30fps progressive source (like bluray) is converted to 1080 interlaced, the A/B interlaced subfields are a perfect match, so the TV can convert it back to a true 1080p progressive feed, which it will then run though a frame doubler to provide exactly the same as a 1080p source would be. The conversion normally takes place very fast, but in general you will have around 1 frame's worth of lag while the display performs the conversion, if you use an AV amp and notice any lip sync problems just add a small delay to the sound (a standard option in all av processors).

The only time that 1080i or 1080p really makes a difference is if you have a video camera that records 60fps. The 1080p camera would record 60 unique images per second, while the 1080i camera would record 60 unique subfields, and in this case the TV cant quite recombine them without combing artifacts.

As your tv is very slightly higher resolution than 720 (768 lines v 720 lines) I would personally send it a 1080 signal, and not care if its 1080i or 1080p and then let the TV scale it down to its native resolution.
 
I'd say compare which input looks best as it will depend on how good your TV is at downscaling. My Panasonic 42" Plasma looks a LOT better with the signal input set to 720p rather than 1080i or 1080p. The scaling on this TV doesn't appear to be very good so I leave that job down to the units that are playing, ie. Virgin HD, Blu-Ray player, Xbox360, etc.

It's suprising how big the difference can be, so definately worth comparing yourself.
 
Thanks Corasik, thats the clearest explanation I've seen.


Chong Warrior said:
My Panasonic 42" Plasma looks a LOT better with the signal input set to 720p rather than 1080i or 1080p. The scaling on this TV doesn't appear to be very good so I leave that job down to the units that are playing, ie. Virgin HD, Blu-Ray player, Xbox360, etc.
It's suprising how big the difference can be, so definately worth comparing yourself.
Click to expand...
Which model Panasonic do you have?
 
Chong Warrior said:
I'd say compare which input looks best as it will depend on how good your TV is at downscaling. My Panasonic 42" Plasma looks a LOT better with the signal input set to 720p rather than 1080i or 1080p. The scaling on this TV doesn't appear to be very good so I leave that job down to the units that are playing, ie. Virgin HD, Blu-Ray player, Xbox360, etc.

It's suprising how big the difference can be, so definately worth comparing yourself.
Click to expand...

That's odd I've found my TH42PX80 gives a better picture when it's sent a 1080P signal from my Blu-Ray player, I have a Panasonic BD35 which won't even send a 24P signal if 1080P isn't used so I'd have to deal with judder also.

Everything I've read about the TV is that it works internally at 1080P and then scales the image for the panel, so sending a 720P signal would end up with it being scaled twice, once up to 1080P and then down to 1024x768 which is the panel resolution.
 
Nah not for me. Sending 1080p signal from Sony BD360 looks barely better than upscaled DVD. The difference on Blu-Ray is huge. It's so big even my wife, who is the most uninterested person in such things you'll ever meet, commented on it straight away when I changed to 720p.

The difference isn't as big for Xbox360 or Virgin or Sky HD but still noticeable.
 
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