Puzzled - TV refresh rates (1 Viewer)

[Jay_UK]

MediaPortal Version: MP 1.1 RC2 (with Owlroost's V4 DLL & Morpheus's TSreader and TSwriter)
MediaPortal Skin: Blue3 Wide
Windows Version: W7x64 (fully patched)
CPU Type: AMD Phenom II X3 705e
HDD: Samsung 1TB
Memory: 8GB 1333MHz (5GB Timeshift)
Motherboard: M4A785TD-M EVO
Video Card: Integrated ATI HD4200
Video Card Driver: 10.3
Sound Card: Integrated
Sound Card AC3: Integrated
Sound Card Driver: W7's
1. TV Card: Hauppuage Nova S/S2
1. TV Card Type: DVBS/S2
1. TV Card Driver: W7's
2. TV Card: Hauppuage Nova S/S2
2. TV Card Type: DVBS/S2
2. TV Card Driver: W7's
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: SAF 4 (Unlocked) - PDVD9
MPEG2 Audio Codec: SAF 4 (Unlocked) - FFDAudio (upscaled)
h.264 Video Codec: SAF 4 (Unlocked) - PDVD9
Satelite/CableTV Provider: Astra 28.2E
HTPC Case: Antec
Cooling: Scythe Ninja Mini (passive), Nocturna case
Power Supply: Antec
Remote: Harmony 525
TV: Samsung LE37B650
TV - HTPC Connection: HDMI to TV, Optical to Sony AV

All,

I puzzled (doesn't take much)... My samsung supports 1080i@50Hz, 1080p@50Hz and 24p

Not quite sure what 1080i@50Hz is?? As 1080i should be 25Hz??

By default I have my HTPC set at 1080p. When I watch a movie or series the TV switches to 24Hz, once finished switches back to the default (50Hz) - So far so good. I see 50 fps via Shift1 when watching TV (and 23.xxx when watching Movies)

I occassionally suffer dropped frames (although a reboot solves it), so I thought I'd switch the TV to 1080i@50Hz by default - to see if it fixes the issue.

I use the ATI profiles to manually switch profiles (the 1080i profile forces the frequency to 25iHz) and let MePo do it automatically when needed.

I then noticed two weird things in 1080i mode:

When watching a movie, the TV does not switch to 24p???
Shift1 is still reporting 50fps??

Anyone got any ideas? Is it ATI not actually running at 25Hz, or is it the Samsung TV not running at 25Hz? Or MePo not handling it right?

Thanks,

J.

 

[nfox]

Can't help you much, but maybe this will help clear up some confusion: 1080i = 25fps @ 50Hz. In other words, because the frames are interlaced (i.e you get the odd lines from a frame, then the even lines, alternately) you only see a complete frame 25 times a second, even though the screen is refreshing 50 times a second.

 

[Spragleknas]

^ What he said
If you want to know more about interlacing, check this What is deinterlacing? The best method to deinterlace movies (didn't work with FireFox here, but Chrome worked).