Sharp LC-70C7450U, Denon Receiver and HD-DVR - AVS Forum
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post #1 of 11 Old 05-31-2012, 08:15 AM - Thread Starter
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Hey guys...

I just purchased this a Sharp LC-70C7450U and I have a DirecTV HD-DVR (sorry not sure of the model...it's piano gloss black if that helps) and a Denon (fairly new) receiver - everything connected with HDMI.

So last night I was watching baseball in HD and wanted to watch something the DVR recorded in SD (480i)...

It switched to the show but it got out of sync and never would display video or sound. The ONLY way I could get the TV back up was to hit stop, then turn the TV off, wait for it to reset on the Denon and turn it back on.

So I dug around and found that my HD-DVR native setting was ON. I turned it OFF and was able to watch the 480i program but with the "noise" on the top of the screen.

What's the best settings here? Why is my new TV giving me fits? Anyone else have the same experience?

Any direction here would be great - thanks in advance.

-Mike

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post #2 of 11 Old 05-31-2012, 08:42 AM
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The noise you see at the top is inherent in the signal and not the fault of the TV. Not sure what the technical reason but it has to do with how the NTSC signal is packaged with blanking intervals and retrace timings. I avoid this by using the zoom feature on the set or simply by not watching content that is Standard Definition.

The reason for the loss of video and sound is the handshaking of the hdmi signal that is happening between the STB, AVR and the TV. You should use 1080i mode on the STB to minimize this. With regards to scaling and deinterlacing on the Denon, I would have that set to auto as well to allow it to pass thru the signal unaltered to the Sharp. It may be the case that the Denon has better scaling and deinterlacing than the Sharp, one would have to test to verify. If you output 1080p from the Denon then the Sharp is just displaying what it gets, if however you output something other than 1080p then the Sharp will scale and deinterlace the signal to display it in 1080p.
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post #3 of 11 Old 05-31-2012, 11:21 AM - Thread Starter
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imws, thanks for the reply!

So just to be clear...

On the DirecTV box, set the resolution to the higher resolutions only (1080p, 1080i, 720p) and set the Native to OFF.

On the Denon, there are video settings (scaling and deinterlacing) - set to AUTO.

Leave the TV alone.

Let me know if I have screwed this up

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post #4 of 11 Old 05-31-2012, 04:12 PM
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That's correct set the DirecTV box to output 1080i, set the Denon to auto so it will pass whatever it gets to the Sharp. That should work well for you and it will minimize hdmi handshakes between the devices.

Now if you have a recent Denon you may want to try setting the I/P scaler to 1080p or 1080p24 depending on what you are watching Directv, if film based then 1080p24 is best as it reassembles the 24 frame cadence that films are shot with and this will minimize judder. I have a Denon 3311CI and the ABT scaler is not very good so I use it in pass thru mode. You will have to try both ways to determine if the Denon scaling is worth it.

For bluray players I recommend you set them to 1080p and enable 24p mode for the best quality.
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post #5 of 11 Old 05-31-2012, 05:35 PM
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I'd love to hear -- how do you like the TV? Have you tried 3D with it? How is it with sources such as Blu-ray, DirecTV, etc.?
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post #6 of 11 Old 06-01-2012, 05:41 AM - Thread Starter
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Thanks guys for the info - I will set this up tonight and report back...

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post #7 of 11 Old 06-01-2012, 05:45 AM - Thread Starter
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Quote:
Originally Posted by dkongzoom View Post

I'd love to hear -- how do you like the TV? Have you tried 3D with it? How is it with sources such as Blu-ray, DirecTV, etc.?

Well there's a bit of a backstory...

I announced to the wife I was in the market for a 70 incher...and I had my sights set on the Sharp Aquos 240mhz that was hovoring around $3200 at Best Buy...

My buddy went to Fry's on their anniversary sale and saw this TV (a 120mhz) and it was $1999

So I raced up and got it.

So far I could not be more happy...except for this HDMI handshake issue.

Blu's look outstanding...I have not tried 3D yet as it didn't come with glasses...and so far DirecTV looks really good as well.

Although I haven't calibrated anything too much also...

So far I love it!!!

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post #8 of 11 Old 06-04-2012, 05:56 AM - Thread Starter
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Quote:
Originally Posted by imws View Post

That's correct set the DirecTV box to output 1080i, set the Denon to auto so it will pass whatever it gets to the Sharp. That should work well for you and it will minimize hdmi handshakes between the devices.

Now if you have a recent Denon you may want to try setting the I/P scaler to 1080p or 1080p24 depending on what you are watching Directv, if film based then 1080p24 is best as it reassembles the 24 frame cadence that films are shot with and this will minimize judder. I have a Denon 3311CI and the ABT scaler is not very good so I use it in pass thru mode. You will have to try both ways to determine if the Denon scaling is worth it.

For bluray players I recommend you set them to 1080p and enable 24p mode for the best quality.

This setup seems to be working nicely...thx!

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post #9 of 11 Old 08-25-2013, 06:51 AM
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Did you ever wind up getting calibration settings for your Sharp lc-70c8470u? I have a friend who asked me to come over and help "tweak" his television picture but have been unable to find any calibrated settings for this model. The closest I have come are settings for the LC-60LE745U but I have no real idea if this is a good place to start or not.

Any help would be greatly appreciated. Thanks!
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post #10 of 11 Old 08-28-2013, 12:39 PM - Thread Starter
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I had Best Buy come out and do a professional calibration...

When he was done is was WAY too warm...once I cooled the picture with the temp settings it looks outstanding...

WAY too many settings to post here...sorry frown.gif

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post #11 of 11 Old 08-28-2013, 05:49 PM
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Understood. If you don't mind, can you share the base picture settings (i.e., which default mode does your picture start with and what are the first bunch of core settings such as color, brightness, etc.). Anything you can share will help me get started with my friends TV thanks.

Glad the picture came out so well.
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