[mythtv-users] Temporal 2x vs Temporal-Spatial 2x

[Neil Cooper]

--- On Tue, 2/7/12, Steven Adeff <adeffs.mythtv at gmail.com> wrote:

> From: Steven Adeff <adeffs.mythtv at gmail.com>
> Subject: Re: [mythtv-users] Temporal 2x vs Temporal-Spatial 2x
> To: "Discussion about MythTV" <mythtv-users at mythtv.org>
> Date: Tuesday, February 7, 2012, 10:20 AM
> On Tue, Feb 7, 2012 at 11:58 AM, Neil
> Cooper <neilcoo at yahoo.co.uk>
> wrote:
> > --- On Mon, 2/6/12, Govindarajan <govind.rajan at gmail.com>
> wrote:
> >> From: Govindarajan <govind.rajan at gmail.com>
> >> Subject: [mythtv-users] Temporal 2x vs
> Temporal-Spatial 2x
> >> To: "Discussion about MythTV" <mythtv-users at mythtv.org>
> >> Date: Monday, February 6, 2012, 7:09 PM
> >> Could anyone point me to an objective
> >> analysis of the two types of
> >> de-interlacing techniques in VDPAU? Also, is the
> difference
> >> noticeable? I am thinking of getting nvidia gt520
> (silent
> >> card) but it
> >> looks like it can only do Temporal 2x at NTSC frame
> rates.
> >> My quest
> >> for the mythical silent (non atom) FE/BE set up
> continues,
> >> hopefully
> >> not for long.
> >>
> >> -Govind
> >> _______________________________________________
> >> mythtv-users mailing list
> >> mythtv-users at mythtv.org
> >> http://www.mythtv.org/mailman/listinfo/mythtv-users
> >>
> >
> > I have this card.
> > http://www.newegg.com/Product/Product.aspx?Item=N82E16814162081
> > Its perfect for MythTV.
> > I'm pretty sure I have mine set to best everything
> quality settings with no issues, but I'll double-check when
> I get home.
> 
> I didn't think the 520 could do Advanced 2x on 1080i? I
> would like to
> know if you are indeed using it, and if you don't get
> skipped frames.
> 
> I have a GT220, fan cooled. Fan died recently though and I
> had stand
> an old case fan in front of it, but it's really loud...
> I want to replace it but can't find anything worth buying
> for under
> $100, I'm not worried about space but I do need Advanced 2x
> and would
> like fanless, or at least a very quiet fan that will
> hopefully not die
> after a few months of use....
> 
> >From my experience, the quality difference for
> Advanced2x is only
> really noticeable >=46", with fast moving content, ie
> sports and such.
> The bigger the screen the more noticeable on slower moving
> content,
> though quick pans and fast movement are the big things. On
> my 1080p
> 50" plasma I can tell with sports, on my parent's 1080i 55"
> rear
> projection the difference is more obvious. I have two Nvidia
> Ion
> systems with a 26" and a 32" tv and my parents have one with
> a 24" and
> one with a 26", in my testing on these monitors with the
> GT220's I
> could not tell the difference watching sports at a
> reasonable
> difference. Only my 26" is 1080p though, the other three are
> 720p
> (1366x768p?)
> 
> I am very picky though...
> 
> -- 
> Steve
> http://www.mythtv.org/wiki/User:Steveadeff
> Before you ask, read the FAQ!
> http://www.mythtv.org/wiki/index.php/Frequently_Asked_Questions
> then search the Wiki, and this list,
> http://www.gossamer-threads.com/lists/mythtv/
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> 


I checked/confirmed this last night. My settings with my GT520 are VDPAU Advanced (2X) for everything.

I have never experienced problems with playing back anything with this setting, including recorded analog, 480p, 720, and 1080i shows, and DVD and Blu-Ray ISOs.

Furthermore since upgrading to GT520 (from on-board nvidia 9400 graphics), I can now playback my Pink Floyd PULSE DVD. With VDPAU + nvida 9400, it played every DVD I threw at it but that one. For some reason it wassn't able to decode that one DVD's mpeg video stream properly, (it looked all blocky and wierd) yet the same rip plays fine with my GT520.

There's an interesting article about VDPAU on wikipedia that lists all the VDPAU capabilites of various nvidia chipsets:

http://en.wikipedia.org/wiki/Nvidia_PureVideo

According to the table there, the 410M and GT520 are currently the only card with VDPAU feature set D, which introduced 4K resolution / QFHD video decoding at up to 3840 x 2160 pixels, including MVC (Multiview Video Coding H.264 decoding support for Blu-ray 3D and other Full HD 3D at 1080p, and HD audio (Dolby TrueHD and DTS-HD Master Audio) bitstreaming / passthrough support.

it Seems to me that if you are buying a card now, the GT520 would be a no-brainer.