Re: Bad quality in Live and Recorded TV...
- From: "JW" <nospam@xxxxxxx>
- Date: Tue, 7 Feb 2006 19:49:12 -0800
I agree with what you say and another point in the food chain that can cause
very poor SD PQ is the upscaling of the less than .4 mega pixels per frame
720x480 image from a DVD or from SD TV to the 1 megapixel per frame of a
720p display or the 2.1 megapixel per frame of a 1080p display. The
upscaling algorithime used by either the PC's graphic card or by the
displays firmware may do a very poor job of inventing the content of the
additional pixels required and thus cause pixelation or what is known as the
"clay face' images.
The best DVD Decoders currently avaialble appear to be the ones that are now
availble for the ATI XP 1300 Pro or better or the NVIDIA 6600gt or the new
NVIDIA 7300 GS video cards.
"Michael J. Mahon" <mjmahon@xxxxxxx> wrote in message
news:vcWdncr-lds-yXTeRVn-uQ@xxxxxxxxxxxxxx
But you should also consider that there are many DVD recorders on
the market that do an *excellent* job encoding 720x480 in real time,
and they are, at most, one or two chips and a memory chip.
In fact, the only "artifact" that I have seen is an occasional
breakup of the detail when movie credits are being scrolled in white
on black with lots of lines of small type! After a second or so, the
motion estimator recovers, and all is well. (It appears that a "crawl
mode" should be implemented as a mode in the next models. ;-)
So if you are seeing quality less than off-the-air analog SD, there
may indeed be something wrong elsewhere in the processing chain.
-michael
JW wrote:
You are completly correct the MPEG2 compression/encoder chips used on
the current analog tuners are pretty lowend when you consider that the
networks and the DVD manufacturers use MPEG2 encoder hardware costing
many thousands of $.
NVIDIA is supposed to be bringing out a new PureVideo dual tuner card
later this month that they claim will do a better job of encoding the
incoming TV.
Check out the following Link:
http://www.techpowerup.com/reviews/NVIDIA/PureVideo/4
"Bob F13" <BobF13@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:FF33A408-EB70-4DAB-A942-960B48BC3A51@xxxxxxxxxxxxxxxx
I've got a month old Dell e510 also with the 19" ultrasharp FP and have
been
similarly unimpressed by the video quality of live/recorded TV. I've been
perusing this newsgroup for solutions but have not had much luck. I've
tried
the nvidia decoder and did not see a noticeable difference. Someone
suggested
using an RF amplifier to boost the signal on the cable, but it made only
a
very slight improvement and actually made some channels look worse.
I guess I've come to the realization that I need to lower my
expectations,
it's just not possible to get video quality anywhere close to the "pool
players" video with all of the A to D to A to D conversion that takes
place
when viewing TV. I suspect that the turner card (which I guess does the A
to
D conversion) Dell uses is a low end model and not up to the task, but
I'm
not yet ready to explore that route yet.
I'll keep checking on this newsgroup though in case someone comes up with
a
solution.
BF
"ccchhhrrriiisss" wrote:
I just received my new Dell E310 2005 Media Center Computer with otional
Media Card and Remote. The computer is a 3.2 MgHz P-4 HT with 1 Gig
RAM. I
have a 19" UltraSharp Digital Flat Panel.
I hooked up the computer, and everything looks great -- except for the
LIVE
and RECORDED TV. I have a regular coaxial cable hooked up from the wall
directly into my Tuner Card into my computer. Even though the Record
Quality
is set at BEST, the TV quality is still poor.
While setting up the program, the "pool players" setup video looked
incredibly good! The resolution, sharpness and picture quality for the
monitor is great for everything except for LIVE and RECORDED TV. I
spoke
with a friend of mine, and he told met that Live TV looks wonderful on
his
2005 Microsoft Media Center PC -- even though he uses a coaxial cable.
However, my quality is much "fuzzier" than what is found on my regular
televison.
Is there any way to improve the quality? It looks quite fuzzy. It
looks as
if the picture has bad "stretched out" resolution, since the smaller
screen
looks decent (when I continue watching TV while doing other things in
the
Media Center). Could it just be that a setting needs to be changed?
This
experience is quite disappointing, since I hoped to see to use this to
record
Live TV and burn to a DVD.
Please help! I have searched through these threads, and it seems that
there
are ALOT of people experiencing the same problems -- but there are alot
of
different suggestions, and many of the suggestions do not seem to work
for
those individuals. Help!!!
.
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