[mythtv-users] What's the point of MythTV HD?
richardwoelk at yahoo.ca
Thu Jan 3 01:15:56 UTC 2008
> Hi George / MythTV Users,
> On Mon, 2007-12-03 at 22:18 -0600, George Mari wrote:
>> David Linville wrote:
>> The best resolution you can get this way is wide-screen 480i. This is
>> the same way anamorphic DVD content works. You takes a 16:9 content
>> stream, send it out your STB S-Video output, it gets squished
>> horizontally to record at 720x480 pixels (4:3 aspect ratio) by analog
>> tuner/encoder card, and stretched back out horizontally by MythTV to
>> it's proper aspect ratio. The only difference between this and
>> anamorphic DVD is that DVD content is usually 480p (progressive) versus
>> 480i (interlaced).
>> I just researched all this a few weeks ago when I upgraded from SD
>> DirecTV to HD DirecTV. The High-def DirecTV set top boxes (Dish too,
>> probably cable boxes also) let you set the format of the signal being
>> sent out any of it's outputs. You tell it whether you have a 4:3 or
>> 16:9 TV, and you tell it how it should display programs that don't match
>> the aspect ratio of your TV - letter box, pillar box, squished
>> horizontally, etc. You can even cycle through the formats with a button
>> on your remote.
>> I get better results with Widescreen 480i than I did stretching 4:3
>> programs to fit my 16:9 TV. I see fewer artifacts, and just better
>> overall quality. It's not HD, but it's better than 4:3 SD, at least to
>> my eyes. Part of that could be that the DirecTV HD signal is less
>> overcompressed than the SD signal was, but whatever.
> A few quick, hopefully not too dumb, questions about this approach...
> I currently have two standard DirecTV STBs which are connected via
> s-video to ivtv cards. My main MythTV host is connected to a HD TV.
> Unfortunately, one of my STBs is dying and I'm told by DirecTV it'll
> cost $69 to replace. It appears that for an additional $30 I can get a
> HD STB, so I am considering going that route.
> When the HD STB is configured to display 16:9, does Myth automatically
> detect this and display full screen? Currently, it appears that 16:9
> content is being displayed in a 4:3 window. I can manually zoom/scale,
> but I find this annoying and I'm wondering if this approach gets around
> that problem.
> Are there extra costs that I'm missing with this option? It looks like
> it'll cost an extra $10/month for HD service. I'm assuming you felt the
> picture improvement of capturing HD as SD was worth that.
> If I get a new HD dish and HD STB, can I continue to use my working
> non-HD STB? Just wondering if I have to replace both STBs, since the
> second one isn't used all that often.
I do this with my HD satellite receiver. Mythtv doesn't
automatically detect the 16:9 content, you have to set that up in your
I changed my "high quality" profile to be widescreen, which is
anamorphic widescreen, while I left "default" as 4:3
When I record from an HD channel, I use the high-quality profile, and
from SD, I use default.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the mythtv-users