Upscaling quality of Sat-Receivers

[marian321]

How are your experiences with the upscaling picture quality of sat receivers?
I have a skymaster dxh80 and its quality in upscaling normal sd-programs (resolution 720 * 576 by ~5 mb/s) to 720p or 1080i is average - not really brilliant.
I've seen mutch better results with the same sd-material on other hardware.

[Fireflyer]

Re: Upscaling quality of Sat-Receivers

I use a Zehnder "HX7133". The quality is the same as you discribed.

What hardware do you mean for better results in upscaling?

[marian321]

Re: Upscaling quality of Sat-Receivers

The "art of upscaling" a sd-picture to HD-resolution needs good grafic quality routines. There are some special processors in good homecinema-receivers which do this very well, e.g. reon hqv or faroudja dcdi...
They do this job even better then the upscaling of some tv-providers, who sell their sd-material as hd-tv.
Therefore this topic question, because I plan to buy a new hd-receiver with (I hope so) better upscaling quality.

[DirtyDonki]

Re: Upscaling quality of Sat-Receivers

Upscaling only resizes it does not improve the picture quality. How could it?

[thecrazybandit]

Re: Upscaling quality of Sat-Receivers

I have never noticed that much difference in a upscaling unit than standard sd picture

[marian321]

Re: Upscaling quality of Sat-Receivers

Upscaling only resizes it does not improve the picture quality. How could it?

Ohh, it could!
Reon hqv or Faroudja dcdi (and a view other) do not only strech the picture, they work with coulor and structur interpolation, sharpening etc.
So they have exellent results on normal sd material.
The skymaster only streches to 720p or 1080i. Another chance is to upscale extern. With my dbox2 and Humax5400 I get good results this way.
How is the upscale result with a dreambox500 or 800?

[Fireflyer]

Re: Upscaling quality of Sat-Receivers

What do you mean with "external upscale"?

I have a normal older receiver with only Scart-RGB? How can I upscale this one? Is this possible?

[thecrazybandit]

Re: Upscaling quality of Sat-Receivers

no not possible must have hdmi output

[marian321]

Re: Upscaling quality of Sat-Receivers

Yes, it is possible with the help of e.g. a good dvd/hdd-recorder. They have a scart input (RGB-signals with 576i) and convert this signal to 720p, 1080i or 1080p. When you have one with good upscaling hardware (Sony, LG, Panasonic etc.) you will get a really good picture. HD-Sat Receivers and HD-TV Broadcasters do the same with their SD-Material.

[besit]

Re: Upscaling quality of Sat-Receivers

Yes, it is possible with the help of e.g. a good dvd/hdd-recorder. They have a scart input (RGB-signals with 576i) and convert this signal to 720p, 1080i or 1080p. When you have one with good upscaling hardware (Sony, LG, Panasonic etc.) you will get a really good picture. HD-Sat Receivers and HD-TV Broadcasters do the same with their SD-Material.

I disagree
What you described is not upscaling, it's called digitizing.
Vintage receiver takes digital picture and preparing it to show on analog TV (composite, s-video), making PAL or NTSC signal. Recorder takes this analogue signal and digitizes it on it's algorithm.
Upscale procedure is like this
You have SD digital signal (480i or 576i, not pal/secam/ntsc)
To make it HD (720p, 1080i or p) you have multiply pixels with some algorythm (bilinear, trilinear,spline, Lanczos e t c)
Simplest way is just duplicate pixels
Hardest but best way is to compare two pixels and to place between them pixel with middle properties.

I haven't seen no receiver that could improve SD channel quality with upscaling.
On the other hand there are some providers broadcasting SD content with a high bitrate so the quality is very good. I mean it's kind early to say good bye to SD TV content.

[pan1300]

Re: Upscaling quality of Sat-Receivers

Yes, it is possible with the help of e.g. a good dvd/hdd-recorder. They have a scart input (RGB-signals with 576i) and convert this signal to 720p, 1080i or 1080p. When you have one with good upscaling hardware (Sony, LG, Panasonic etc.) you will get a really good picture. HD-Sat Receivers and HD-TV Broadcasters do the same with their SD-Material.

hi

me too, a bit critical, I have a dvd/hdd-recorder (sony) with such 'upscaling', as you say has scart input and hdmi output, but I never found the result very impressive ...

[marian321]

Re: Upscaling quality of Sat-Receivers

This is quite philosophic. First digitalisation, then upscaling.
The method with extern upscale means you have a sd-signal and transfer it to hd. When you do this e.g. with an Onkyo 905 (Reon HQV) you can see exellent results. But I think that a sat reciever doesn't have such a solution.

[Satphoenix]

Re: Upscaling quality of Sat-Receivers

I've also heard that some receivers can lift up a sd picture to better quality in hd. But I think that this are the more expensive ones!?

[marian321]

Re: Upscaling quality of Sat-Receivers

Absolutly yes! A good example for upscaling is the ps3. It has a powerfull grafic hardware in which recorded sd-sat streams get nearly hd-quality in 720p, 1080i or 1080p scaling. I started this topic because perhaps a good hd-receiver can reach equal results in upscaling. I expect equal results if you use the ps3 as dvb-t receiver with playTV.

[runmo]

Re: Upscaling quality of Sat-Receivers

keep it to the topic of "udate qualitiy sat-receivers", thank you