The de-interlacing thread

[syam]

There are quite a few PCH owners (me included) who need to use it for interlaced video. Examples: people who watch direct DVD rips (iso or vob files), and video made with camcorders. I've seen a few threads here were people complained about de-interlacing artifacts with PCH.

I heard the PCH's CPU can do de-interlacing. I decided to check that. I am from NTSC world, so I used NTSC version of HQV Benchmark DVD (SD), which I ripped to my PC and streamed the vob files to PCH. For HD, I used the free video test patterns from here (1920x1080). My setup: full HD TV connected to PCH via HDMI. On PCH, I set 1920x1080x60p output.

The results: terrible! PCH failed big time all the de-interlacing tests, both SD and HD. Everything was very bad: motion based de-interlacing (which applies to home-made video), 2:3 pulldown (most of commercial NTSC DVDs), 2:2 pulldown (modern HD camcorders with 30p frame rate), etc. For comparison, I ran all the HQV tests on my Samsung Blu-Ray player (BD-P1200), connected the same way (1920x1080x60p) to my TV, also via HDMI. Results - almost perfect. (This player uses a state of the art HQV video chip, so it was not surprising.)

I have a big problem with this. I've made a lot of home (SD) videos in the recent years, and plan to buy an HD camcorder. Now it looks like PCH cannot properly (or at all) de-interlace these sources. I see two possible explanations: (1) SMP8635 does a very bad job in de-interlacing, or (2) SMP8635 can do de-interlacing well, but PCH doesn't enable this functionality. In the first case, we are all screwed, in the second, there is some hope that the situation can improve via a firmware fix.

Has anyone else made similar tests? Please post your results here!

[booster]

My configuration:
Sony 32V4500 TV
PCH-A110
HDMI connection, 720p

I have problem with .ts-video (sat. transport stream) maked by DreamBox 500.
Popcorn Hour does not deinterlacing video files.
At viewing characteristic "comb" is visible.
Test file - http://yy.lv/upload/index.php?ACT=4&f=39984

Interlaced screenshot - http://www.imagebam.com/image/42e5fb34183878

[spawn]

#Syam and booster

If you have lots of interlaced sources, you could output interlaced instead of progressive, and let your TV do the deinterlacing.
Just change output to 1080i instead of 1080p for these sources.

Im aware it doesnt "solve" the problem of poor deinterlacing, but its a workaround for now.

[booster]

(05-05-2009 02:25 PM)spawn Wrote:  If you have lots of interlaced sources, you could output interlaced instead of progressive, and let your TV do the deinterlacing.
Just change output to 1080i instead of 1080p for these sources.

I use a player for viewing of different files and I do not wish to change settings each time.
I tried to change the resolution to 1080i, but it has not given any results on quality of video.

(05-05-2009 02:25 PM)spawn Wrote:  Im aware it doesnt "solve" the problem of poor deinterlacing, but its a workaround for now.

Sigma 8635 processor has in specifications this feature:
http://www.sigmadesigns.com/public/Produ...630_br.pdf
.....
Motion adaptive deinterlacing
....
Such feature is intended just for such cases?
Source is interlaced, output - progressive, why deinterlacing dos not work?
It is an error in Syabas firmware or Sigma SDK? Hardware problem?

[mcmillyonaire]

Retail dvds are 24p. Why would you need to deinterlace?

[booster]

(05-05-2009 02:57 PM)mcmillyonaire Wrote:  Retail dvds are 24p. Why would you need to deinterlace?

I have problem with interlaced satellite records (.ts)
DVDs is OK.

Bugs with deinterlacing confirms?
Do you try to play examlpe file?

[mcmillyonaire]

I was referring to Syam, I didn't realize his post was that old though. I'm downloading your example file. I will let you know.

[spawn]

Quote:Motion adaptive deinterlacing
....
Such feature is intended just for such cases?
Source is interlaced, output - progressive, why deinterlacing dos not work?
It is an error in Syabas firmware or Sigma SDK? Hardware problem?

No - it doesnt deinterlace because your source file are flagged wrong - its flagged as being progressive.
You need to fix your transport streams first

General
ID : 1
Complete name : E:\spawn\Video\recordfile\110_000_1241043924_1241043925.ts
Format : MPEG-TS
File size : 22.8 MiB
Duration : 45s 983ms
Overall bit rate : 4 161 Kbps

Video
ID : 321 (0x141)
Menu ID : 10102 (0x2776)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, Matrix : Default
Duration : 45s 983ms
Bit rate mode : Variable
Bit rate : 3 803 Kbps
Nominal bit rate : 15.0 Mbps
Width : 704 pixels
Height : 576 pixels
Display aspect ratio : 4/3
Frame rate : 25.000 fps
Colorimetry : 4:2:0
Scan type : Progressive
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.375

[booster]

(05-05-2009 03:41 PM)spawn Wrote:  Scan type : Progressive

Thanks for the help!
I will find out at developers a satellite receiver.
With the help of what program can I to see and change the information in .ts files?

[spawn]

You can see the information using a software called mediainfo - but I cant remember a tool off my head that will let you manually change the header

http://mediainfo.sourceforge.net

But Try the TS-doctor tool created to repair digitv recordings by a member here called Cypheros - and ask in his thread about changing the header - he knows lots about transport streams and how they are constructed.

http://www.networkedmediatank.com/showth...p?tid=5624