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Adventures in Home Theater Calibration
One man's attempt to calibrate his high-definition home entertainment system.
Home Theater Calibration
May 28, 2008 | by Phil Lozen

After about an hour of working with the video test patterns, I made pretty good progress. Here’s how things changed, my old settings first:

Contrast - 89 to 92
Brightness - 54 to 58
Sharpness - 39 to 11
Color - 54 to 60

You can see that my sharpness setting number dropped by more than a third. According to the disc’s HD Video Calibration section, this control is actually a holdover from the early days of color TV. In most cases, this control doesn’t need to be active for HD signals. Sure enough, using the Overscan test pattern, I was able to see I had mine set way too high.

My display performed miserably in the Overscan test (screen area). When looking at that pattern I can see I’m losing the bottom five percent of the picture, the left three percent, the top two percent and the right two percent. I also learned that my picture is rotated ever so slightly clockwise. Unfortunately I can’t fix any of the Overscan issues without getting into the TV’s service menu. I did buy an extended warranty with my TV, so hopefully I can get some of these issues resolved with a technician, and maybe convince him to show me the service menu while he’s at it.

Once I finished with the calibration, I went to the disc’s demo material, which is broken up into both 720p and 1080p material filmed at both 24 and 60 frames per second. My set’s limits showed themselves again when trying to process the 24FPS material using a 3:2 pulldown. Make sure to watch the 1080p material with Joe Kane’s narration even if you have a 720p set, as he does a great job of explaining what to look for in the demo material.

An unexpected benefit of my efforts was how much better my Comcast HD signal looked when I used these same settings on that connection.

Audio Tests
Calibrating the audio proved to be slightly less time consuming, and having someone help you would make it even quicker. The majority of the tests on the disc are video tests, but it includes everything you need to properly calibrate your audio. Be sure to have a sound pressure level meter with you when performing these tests.

Using the Band Limited Pink Noise Multi-Channel Levels and Balance (whew) test signal along with my SPL meter, I was able to get my receiver putting out 75dB at reference level on all my speakers. I flipped to my receiver’s built-in test tones just for comparison and found that they were about 2dB off from the disc’s tones and nowhere near as uniform, varying by as much as 2dB from tone to tone. Here are the results of my audio calibration, original settings first:

Front left - +4 to +2
Center - +2 to -1
Front right - +2 to -1
Rear right - +4 to -3
Rear left - +4 to 0
Subwoofer – Settings stayed the same

All told I spent about four hours with the disc. It was a great exercise and I’m getting renewed enjoyment out of my set now that the picture is back to looking its best. Certainly, hiring a professional to calibrate your discs to ISF standards will yield the best results, but for only the price of the disc and sound meter, you too can have your set looking its best.

Read more about home theater calibration on ElectronicHouse.com:
Calibrate Your Own Audio and Video
Get the Best Picture from Your New TV



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Comments (9) Most recent displayed first.
Posted by Smith Weil-Sandiego Personal Injury lawyers  on  01/23/09  at  07:30 AM

Now this is something which I was talking about a real house, full loaded with electronic gadgets. Really this post is Heaven.

Posted by htwaits  on  05/29/08  at  02:13 PM

I’m sorry you had such a bad experience. That doesn’t seem to be the case for most folks. There are a few “over-reactors” in any very large group.

Posted by wtf?  on  05/29/08  at  02:06 PM

“If you had visited http://www.avsforum.com when you bought your Samsung DLP you would have discovered several things.”

What I discovered when I went there is what a cesspit of flamers and haters dwell there.

I’ll grant you that there are some really helpful people there, and I salute them for putting up with all the ugliness. But you need a very tough skin to stick around long enough to find these “good” people among all the bad. God help you if you ask what is seen as a ‘stupid’ or “newbie” question. You’ll get flamed so hard you’ll make a point never to return. I know I did.

Posted by htwaits  on  05/28/08  at  07:34 PM

If you had visited http://www.avsforum.com when you bought your Samsung DLP you would have discovered several things.

The “sharpness” control does nothing so most owner’s at AVS have it set to zero.

All the Samsung Image enhancement features should be turned off.

Entering the service menu is easy to do, and once there adjusting the image location on the screen is no more than clicking on up, down, right and left.

There is nothing in the service menu that can damage your Samsung DLP, but using it to correct gray scale and color is a job for a professional with the right tools and experience.

The best that your DLP RPTV can do by adjusting the user controls isn’t the best that your TV can deliver. I calibrated our Samsung HL-P5063 DLP RPTV using the earlier edition of the one you used. My results were no where near the quality of the professional calibration that was done later.

Owner’s who want to improve on the PQ that comes out of the box can learn a lot by going to AVS, and checking into an owner’s thread for their model.

Posted by Rod Weeks  on  05/28/08  at  03:24 PM

Hi Phil
Yep - I’ve noticed that for newer releases, especially BD, that my “normal” settings are usually fine.  It seems like it’s mostly older material, and some stuff off the dish that need specific tweaks.  One should also try to understand what the director or DP might have had in mind.  You could go nuts trying to get a so called “normal” picture out of “Sin City” or “The 300”.


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