Weak signal, bad picture?

Robbiewright

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Cairo, Egypt
#1
I have a 2.4 meter prime focus dish here in Egypt. Like most things here, it is all a bit wobbly and the L.N.B is held on with a great amount of gaffer tape which make fine adjustments almost impossible. Anyhow, my question is, will a weak signal give you a bad picture? Not breaking up and crackly noise, but a slight loss of picture quality, annoying bad but still watchable. I was led to believe with digital you either have it or you don't. I have all the channels I think I am going to get here with no break up and good sound but the quality isn't the best. Will more tweaking help?
 

Llew

cerca trova...
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#2
No, the quality of the picture you are receiving depends on the standard of resolution the provider is transmitting.

Best for standard definition signals is 720X576, below that you begin to see a drop in quality of your picture (worst is 352X288, which some cheapo providers use).

Llew
 

Robbiewright

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#3
Thanks Llew, That's what I thought, can you answer another question for me. Is Sky one provider or is it made up of lots of providers? U.K, Discovery, etc?
 

rolfw

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#4
It is lots of providers Robbie, all being broadcast under the sky package.

Bad picture quality could be to do with the scart leads you use, if a good quality lead and an RGB TV is used, then there should be a good picture on pretty much all of the channels, I certainly haven't noticed too much in the way poor picture quality.
 

dxsat

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#5
Seeing as you have a 50" plasma, it would be worth getting a HD receiver. Standard definition is really crummy blown up to that size.
The answer to your original question is that provided there are no breakups of the signal, that is over threshold, there is no difference between that and the strongest signal. So long as you have 100% of data you'll see a perfect picture. The Pace V3 Sky+ box has a slightly better quality output via scart than standard boxes.
 

Likvid

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#6
SD definition look great on a 50" plasma as i have one myself, problem being that you need to buy a expensive scaler/processor to get this kind of quality.

I own a Crystalio VPS2300 processor with builtin Faroudja processing and noise reduction features and the picture is incredible compared to without it.

Mine costed £2,500 but you can get other models that are cheaper that also will improve SD.
 

Zorba

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#7
If you are connected to the tv with a scart lead make sure you are on RGB not PAL in the picture settings menu.
I am not impressed with some lcd/plasma tvs with sky digiboxes.A lot of them give a grainy type picture and some are bad on fast moving scenes.Sometimes top quality cables help.
 

dxsat

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#8
Likvid said:
SD definition look great on a 50" plasma as i have one myself, problem being that you need to buy a expensive scaler/processor to get this kind of quality.
It may be possible to improve SD quality using expensive interpolation hardware, but RobbieWright has a Sky box, and these always look terrible on large screens at normal viewing distances. His Pace Sky+ is better than most. If 10847 V is receivable, anyone with a 50" plasma would see a huge increase in quality with only £100 investment in a Pace 810XE, to receive the BBC HD channel. The picture quality (particularly on Planet Earth) is really stunning. It's not just the extra detail, colour fidelity is better as well, and the sound is 5.1 Dolby Digital.
 

Robbiewright

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#9
At the moment I am using the Svideo out put, I will try and change to a scart lead, if not I will just have to wait until the next time I get ti the U.K and try and pick up a HD box.
 

PaulR

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#10
If you have an S-video out then you must have either a Grundig Digibox or a $ly plus box. S-video is pretty good, nearly as good as RGB, and certainly noticeably better than ordinary composite video. Frankly, the quality of your SD picture at this point is down to your TV. Good ones will have pixel multiplication software and other clever things to get the best out of the signal.

I don't have HD yet, probably won't for quite a while, but I am still impresssed by the job my Philips TV does with its Pixelplus processing with a standard signal. Given the limited amount of HD material around I would say that, at the moment, how an HD TV treats an SD signal is still important.

As ever, being able to see a working example of a TV is a good idea.
 

PaulR

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#11
D'ohhh

Just seen in your system details that you have a Sky plus V3, so this explains the S -video output. What TV do you have and does it have any video processing capabilities?
 

Robbiewright

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#12
It's a Samsung and I can't find a model number on it or the book.
It has DNIe. It's all quite watch-able, just a bit disappointed with the quality on some of the channels.
 

Robbiewright

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#13
Digital NR, it has that too. I really should read the book.
 

PaulR

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#14
Robbiewright said:
I really should read the book.
That could be a mantra for a great many people - and I include myself there!
 
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