NZ TV3 is stuttering and fast movements are blurred

[AlBoyo]

Can anyone please advise on the following?

My TV3 NZ is a little jumpy and fast movements, for example a news presenters mouth appear quite blurred and non-distinct.

The other channels are fine but then they are lower res aren't they...

I have the following setup for codecs etc...

Mpeg 2
Video is the Cyberlin decoder that comes witht he TV card
Audio is ffdshow
Audio renderer is the onboard realtek high def

Advanced codec (Which I assume is giving me the problem)

H.264 is Cyberlink H.264/AVC Decoder (PCM45)
AAC Decoder is Monogram AAC
HE-AAC is Monogram AAC

I'm running Vista Home Premium on a core duo 2.4 with gig Ram, Nvidia GeForce 7600 GT, Haupagge HVR 4000 hooked in to a panasonic Viera PY800 42 inch 1080p. I currently have the DVI output from the graphics card being converted to VGA for the PC input on the TV as I dont have any other option. Desktop resolution is 1280 * 768

Any help would be appreciated.

Oh and if it matters, for some reason when I maximise GB-PVR, I can still see the window it is sitting in, with all the maximise and minise buttons just visible...

Thanks....

[sub]

Assuming this is TV3 via DVB-T, then it'll be the advanced codec settings that are relevent.

TV3 is 1080i, which is hardest on the PCs. A lot of people find this channel not smooth unless they use hardware decoded with Cyberlink or Arcsoft decoder. Unfortunately your video card doesnt support H.264 acceleration though. You could maybe try the "VMR9 Fullscreen Exclusive" video renderer option to see if it helps.

[AlBoyo]

Dam, I figured when I bought got a media PC with a hi def drive in it, I wouldn't have to worry about the graphics card not being able to support stuff. Any suggestions for a suitable replacement graphics card?

[sub]

The nvidia 8500/8600 cards seem to be a pretty good match with our highdef system.