[mythtv-users] nVidia's SD processing better than Panasonic's (was LED or Plasma)

Paul Gardiner lists at glidos.net
Sun May 30 14:32:04 UTC 2010

Alasdair Macdonald wrote:
> On 27 May 2010 09:11, Paul Gardiner <lists at glidos.net> wrote:
>> Alasdair Macdonald wrote:
>>> On 11 May 2010 13:28, Paul Gardiner <lists at glidos.net> wrote:
>>>> I want the Plasma, don't I? Tell me I want the Plasma... go on...
>>>> go on! :-)
>>> Well, the topic came up at the perfect time for me; I've been
>>> following it for the past several days, took advice that was offered
>>> earlier in the discussion, and have placed my online order (Panasonic
>>> TX-P50G20B) just a few minutes ago.
>> Are you seeing a lot of posterization from yours in darker images,
>> especially on walls and faces? At first I thought it was just the
>> TV being larger than I was used to showing up poor sources, but
>> I'm seeing it in all sources. Also, if I pause and adjust the
>> brightness, the colour bands move, which also indicates that it's
>> the TV not the source. It's bad enough that I'm considering
>> returning it. Although maybe this is a problem with all modern
>> TVs.
> I think the answer is No. I haven't yet seen any issues that I would
> identify as being specific to this model. That is to say where I am
> seeing weaknesses in the picture, they are the same weaknesses that
> were observable on my old CRT, and are inherent to compressed digital
> video. (And I think that the main issue is the same as what you are
> describing, but I don't often notice it these days except when I
> search for it. My main video source is higher bitrate UK DVB-S
> broadcasts, undoubtedly more and more artefacts creep in with lower
> bitrate broadcasts).

Now that I have MythTv working on my ION-based board, I'm no longer
seeing any significant posterization from the Panasonic TX-P50G20B.
It's a real suprise: I'm getting a much better picture having vdpau
do the deinterlacing and upscaling than when the TV decodes directly.
It's also better than when the TV plays my MythTv recordings directly
using DLNA, and it's better than when I drive the TV from Myth using
a 576i mode (although driving with 576i wasn't really a good comparison
because it was via component rather than HDMI and using a via chip set).

Anyway, all sorted. I'm now getting a superb picture.


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