RGB vs. CVBS

37 replies

Yes you problem whit text left to right is related to the feature box, thats handles 100 Hz but is not a fault.

your TV works as it shout...

the problem whit chancing quality between the channels, comes down to what the TV channel pays for the transmission. Film channels like canal plus (or sky movie or whats it called in the UK😁) has a hi bit rate and low compression = good quality. Channels like BBC World has a low bit rate and hi compression = poor quality. And lots of channels lies in between, some with OK some with poor quality, the picture on the screen is only as good as the feed to it.

best regards

Cheers again guys, I will try and get that photo.

The problem isn't realted to channel (that I am aware of) so much as program - I've had problems on BBC1 / ITV (which I'd expect to get as much bandwidth as any those being the main 2 TV channels in the UK) as well as on terrestrial analogue (I think, but need to confirm).

I've been trying to work out for a while a common element to the problem, it isn't channel or, source,

One other theory I had (but not managed to prove yet) is whether it could be a problem relating to aspect ratio - e.g. if my STB is set to 16:9 and the program is broadcast in 4:3 and the Bv3 is showing in 15:9 (? it's a sort of zoomed in 4:3) it would have to take a certain number of pixels of width and put them in more pixels when it displays in 15:9 which I can imagine being a problem.

Maybe when a program is broadcast in 16:9 and I watch it so I have no problem?

The problem with this theory is it is difficult to know how a program is broadcast and so to prove it.
 

Jeddy 

find format in list and press go it tells you what format its in

Right here is a picture from todays weather... (it was taken at 1/60 so there should only be 1 frame (2 at most) here).

 have a look at

 http://picasaweb.google.co.uk/jezzastone/BOPicture1/photo#5080439040253933282

I'm having trouble inserting the picture inline.

 

As you can see, subsequent frames seem to be separated by half a characters width - e.g. the S in Southampton.

It took the S approx 4 seconds to go from right to left (66cm) and the S is 0.8cm wide itself. So at 25fps that is less then .66mm per frame it should be moving. So why do I have 2 adjacent frames (even superimposed frames) 4mm apart?

Although I can't prove it with a picture, it also looks like the frames really are superimposed on each other rather than coming one after the other. Surely 100Hz may be interpolating the frames, but duplicating them??

The picture is actually not a bad representation of what I see, i.e. you really can't tell it is Southampton withouth knowing it.

Help please.

Thanks,

Jeddy 

Jeddy,

Based on your picture and description, you certainly have a problem with your BeoVision 3.

This problem is nothing to do with 100Hz or RGB and in my view this is a fault with the TV.

Has this problem existed ever since you owned the BeoVision 3 or if not, how long has it existed ?

This problem is almost certainly going to require a dealer to change the micro-processor board which is the main board in the TV.

Location: Hampshire, England

Hi Keith,

I've had the set for nearly a  year now and it has always been like this (I've been trying to find out on and off what the problem is since then).

This sounds expensive - I wonder if this is why such a new set was passed on!!! I think I may have been done. 🙁

I'm not having a lot of luck with TVs these days, the main reason I went for a B&O is because I've had two pre-owned ones in the past which lasted years with faultless service and after the Loewe failed so soon.

Thanks,
Jeddy

Hi Jeddy

Just to ensure that no stone is left unturned......

I too have been querying this whole rgb/cvbs issue. I recently had to replace my BV4 after builders smashed it(!!) - the "new" preowned screen was definitely an improvement on the old from a picture quality perspective. However, I have a Beomedia (oh dear!) so needed the VGA input on the beosystem2 that drives the monitor. That meant "upgrading" the beosystem 2 to the mkIII version.

Beomedia is now much better thanks to VGA input (still rubbish really as the s/w is pants, previous scart/phono converter was a joke), but the picture quality from my Sky box is not as good. The txt on the Sky menus is dire. To me this seems to be a weakness in the beosystem  - at some stage I may have the chance to swap to an alternative boesystem2 and will let you know my findings......

Troubleshooting like this is so often the unexpected so I thought I'd add my 2penneth!

 Keep us in the picture!

 

Mark


 

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