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Potentially stupid Sharp Aquos HDMI Menu Question

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Old 02-04-2006, 08:36 PM   #1
jmk
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Default Potentially stupid Sharp Aquos HDMI Menu Question

Hi, I'm relatively new to HDTV and brand new to this forum. We got a 32" Sharp Aquos a few weeks ago and I just got DirectTV with the HD receiver, which I have connected to the Aquos with an HDMI cable. I'm still finding all the bells and whistles on the Aquos and today I noticed for the first time that there's an HDMI Setup Menu on the Aquos. What is confusing me is the "signal type" options, and so far no one at DirectTV or any of my tech-head buddies knows the answer, so I thought maybe someone here would.

The Signal Type menu has 3 options: RGB, YCbCr 4:4:4 and YCbCr 4:2:2. The Aquos manual specifically states that these options refer to the signal coming from the external source, in this case the DirectTV box. Does anyone know which one I should use? It's defaulted to RGB, and I tried the two others with no noticeable change. If you choose RGB, you then have two "sub-choices", for Color Matrix: ITU601 or ITU709. I haven't futzed with either of those yet.

One other thing that I'm finding a little weird--I initially had the DirectTV going to the Aquos with component cables, but upgraded to the HDMI. The picture is great, but I get a little audio "pop" when I change channels with the HDMI input, which did not happen with the components. A DirectTV tech person said this was normal, but it's a little annoying. Any ideas of how to circumvent this? (I've just defaulted to having the mute on when I change channels).

Thanks in advance for any help you can send my way.
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Old 02-05-2006, 12:12 AM   #2
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Ya I have that pop on my Sharp Aquos while using HDMI as well. It's also there when im playing DVDs, i.e. changing menus. I guess i got used to it.
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Old 02-12-2008, 08:59 AM   #3
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could be a grounding issue... i would try and check ur outlets... maybe if u upgrade the 6 way to something alil more robust it will take the pop out...just a suggestion .. not a definite solution...
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Old 02-12-2008, 12:37 PM   #4
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Quote:
Originally Posted by jmk View Post
The Signal Type menu has 3 options: RGB, YCbCr 4:4:4 and YCbCr 4:2:2. The Aquos manual specifically states that these options refer to the signal coming from the external source, in this case the DirectTV box. Does anyone know which one I should use? It's defaulted to RGB, and I tried the two others with no noticeable change. If you choose RGB, you then have two "sub-choices", for Color Matrix: ITU601 or ITU709. I haven't futzed with either of those yet.
And here's the rub, I'll bet there's not one person at DTV that can answer the question of what "signal" is coming from the DTV box,
nor does it offer that information in the User Manual. Right?

Anyway, all of the choices refer to different "flavors" of "color space encoding". Truth is, there's really no way to know what your DTV box is going to be delivering as it is probably not sensing, decoding and recoding every signal that it receives.
The best option is to stay with RGB, and if you "must" select either ITU601 (NTSC color space) or ITU709 (ATSC color space), try them both to see if there is any visible difference - if none, don't worry.

After making this selection, calibrate your color and hue and things will be "just fine".
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