Originally Posted by vividere
I thought upscaling occured with older DVDs?? I thought the 480i images would be upscaled to 720p? Maybe I am confusing upscaling and up-converting? This is what Toshiba says about the HD-A2:
I interpreted this to mean that I could insert a SD DVD into the HD-A2 and it would up-convert it to 1080i and if connected with a HDMI cable to the TV it would display the image in 1080i. Further, I thought the receiver simply passed the 1080i signal through? Am I misunderstanding this?
What is the difference between the up-converting done in the DVD player vs. the upscaling done in the receiver? Are these two different things and don't have anything to do with each other?
I am assuming what whatever signal received via HDMI is passed through. The upscaling would be video coming in through S-Video, composite, or component? The receiver is doing what the DVD player does? Do they call it up-converting in the DVD side of things and upscaling in the receiver?
Most of my viewing will be DVDs but what happens if I use my VHS player? If I want to watch an older VHS tape which has composite output, what happens with the signal? Will the receiver upscale it to 720P or?? Likewise, what if I hook up an older Nintendo or something that outputs composite video? Same thing with S-Video.. I have some SVHS videos too.
Sorry for all the questions...I just got the HD-DVD player and have just recently been looking at a new receiver so both up-converting and upscaling are new to me and I am confused on what the difference is and what works and what doesn't?
You are pretty much on the right track, but lets clear up the terminology to avoid confusion.
Upscaling is where material has the resolution changed... eg 480 vertical lines gets upscaled to 720.
Upconverting is where one input type (eg composite, svideo or component) is converted to another (eg HDMI).
Also for the record deinterlacing is where an interlaced signal (where alternatingly half the lines for each frame are sent) eg 480i, is turned into a progressive signal where all lines are sent for each frame - eg 480P
In your example of your DVD player, it sounds like the DVD player itself is upscaling your standard DVDs to 1080i, and you are connecting this via HDMI to the onkyo receiver. In this case, you have an upscaling DVD player, and as far as the onkyo receiver is concerned, it is simply accepting a 1080i signal over HDMI and passing that through untouched to the HDMI output. It doesnt know or care that the signal was upscaled, it simply knows that it passes through any HDMI signals untouched.
In your other example, your VCR is connected to the onkyo via composite (or if it has svideo this would be a bit better), and yes the onkyo will upscale this to 480P (or 720P if you set the "secret" menu option to force 720P upscaling), as well as upconverting the signal to HDMI, so you only need the one HDMI cable from the onkyo to the TV.
Upconverting can also happen from composite or svideo, to component. But this doesnt really apply to you since you have a HDMI tv and should obviously connect to it using a HDMI cable. For me personally, i have an older CRT tv and the best inputs it has are component, but at least this means I can have any older composite/svideo devices (not that i use any!) upconverted to component, so i only need to run component video cable from the receiver to my TV. It also means i cant have ANY HDMI sources, since HDMI cannot be downconverted to component or anything lower...
The "downside" of the midrange scaling in the 705 comes into play mainly when dealing with component video sources. Component can carry signals up to 1080P (eg the XBOX 360 non elite only has component output, but can do this at full 1080P resolution). If you want to put this into the onkyo, and upconvert it to HDMI, it actually gets DOWNscaled to 720P if you want it to go out via HDMI. The onkyo does however still pass through the 1080P component signal through the component outputs. So basically xbox360 owners will either have to have their receiver hooked up the TV via both HDMI and component cables, and switch inputs on their TV as well as inputs on the onkyo when they want to use their xbox, or they will have to have their xbox resolution downscaled to 720P (or simply have their xbox output 720P in the first place, since it may actually produce a worse image to have the onkyo downscale the signal compared to if the signal was just output from the xbox at 720P to start with).
Regarding this secret menu setting i talked about, basically the default upscaling setting is AUTO which means that 480 and lower signals and are upscaled/deinterlaced to 480P, and higher than 480 signals (eg 576i from a DVD player) are output at 720P. So by default, some upscaling is to 720P and some is 480P (depending on what it was to begin with). If you set this option from AUTO to 720P, this forces all upscaling to go to 720P (even 480 and lower signals) but apparently this may put black bars on widescreen material, which i guess is why this is a secret menu option and not out of the box functionality, since they either couldnt, or couldnt be bothered to, get it working
Since i have no HDMI i am only relating what i have read and hope that its correct... i have not actually used or tested these things myself. You also have to bear in mind that upscaling may produce artifacts or not as great an image as you had hoped. The more times a signal is messed with the worse it is going to become, and some devices have better upscaling chips in them than others... this is why there are dedicated video scaling devices or higher end devices with REON chips in them etc... basically i wouldnt expect a receiver that costs what this 705 does, to do a fantastic job when it comes to upscaling, but as i have said, i havent experienced this for myself...