THX Optimizer and picture/contrast - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 11 Old 09-06-2009, 09:43 PM - Thread Starter
Member
 
dark scorpio's Avatar
 
Join Date: Jun 2009
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
on somebodys advice, i decided to throw in one of my daughters Pixar dvd's for the test. well it starts out with the calibration for contrast. ok so heres where im confused: i turned the contrast all the way up and could still see all four shades distinctly. i thought if it was too high youd just see all white. am i wrong?????



secondary dumb question: ok just in case i did it wrong, you dont adjust the picture when it shows the little white box up in the corner right? I did it when i clicked on "Play Test" and the big image of the shades of white were displayed. just makin sure

I want to shoot my TV
dark scorpio is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 09-06-2009, 10:36 PM
AVS Special Member
 
cavu's Avatar
 
Join Date: Apr 2005
Location: CANADA
Posts: 6,886
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 13
Quote:
Originally Posted by dark scorpio View Post

i turned the contrast all the way up and could still see all four shades distinctly. i thought if it was too high youd just see all white. am i wrong?

You probably have some 'magic' automatic mode engaged on your TV set which makes such settings almost impossible.

What is the model number of your TV?
Quote:


I did it when i clicked on "Play Test" and the big image of the shades of white were displayed. just makin sure

You did it properly.

"The greatest obstacle to discovery is not ignorance  it is the illusion of knowledge." - Daniel Boorstin
"Our lives begin to end the day we become silent about things that matter.
" - MLK

cavu is offline  
post #3 of 11 Old 09-06-2009, 10:48 PM - Thread Starter
Member
 
dark scorpio's Avatar
 
Join Date: Jun 2009
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by cavu View Post

You probably have some 'magic' automatic mode engaged on your TV set which makes such settings almost impossible.

What is the model number of your TV?


magic?

im not on an HDTV (forgot to mention that if it matters)

its a Sony FD Trinitron Wega: KV-32FS120

I want to shoot my TV
dark scorpio is offline  
post #4 of 11 Old 09-07-2009, 01:48 AM
AVS Special Member
 
cavu's Avatar
 
Join Date: Apr 2005
Location: CANADA
Posts: 6,886
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 13
Quote:
Originally Posted by dark scorpio View Post

magic?

Page 22 of the TV manual says there is a "Vivid" video mode.

That setting should probably be set to "Movie".

Then try your calibration again.

You might also want to set the Color Temp to "Warm"and turn the "Clear Edge VM" to "OFF.

Without being there or having that set, these are best guesses.

"The greatest obstacle to discovery is not ignorance  it is the illusion of knowledge." - Daniel Boorstin
"Our lives begin to end the day we become silent about things that matter.
" - MLK

cavu is offline  
post #5 of 11 Old 09-07-2009, 04:24 AM
AVS Special Member
 
Michael TLV's Avatar
 
Join Date: Feb 2000
Location: THX/ISF Calibrationist/Instructor, Calgary, AB, Canada
Posts: 6,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Liked: 129
Greetings

Contrast test on THX disc does not apply to CRT displays. You need a light meter for a CRT. 30 fL is the goal based on a 100% white window box pattern.

regards

Michael Chen @ The Laser Video Experience
ISF/THX/TLV Video Instructor
The Video Calibration Education Hub - www.TLVEXP.com

Michael TLV is offline  
post #6 of 11 Old 09-07-2009, 02:14 PM - Thread Starter
Member
 
dark scorpio's Avatar
 
Join Date: Jun 2009
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by cavu View Post

Page 22 of the TV manual says there is a "Vivid" video mode.

That setting should probably be set to "Movie".

Then try your calibration again.

You might also want to set the Color Temp to "Warm"and turn the "Clear Edge VM" to "OFF.

Without being there or having that set, these are best guesses.

i dont use the vivid mode. i am on standard mode but i could try testing out movie. i have already turned off the VM. I have color temp set to off. What is the advantage to setting it to warm?

I want to shoot my TV
dark scorpio is offline  
post #7 of 11 Old 09-07-2009, 03:28 PM
AVS Special Member
 
cavu's Avatar
 
Join Date: Apr 2005
Location: CANADA
Posts: 6,886
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 13
Quote:
Originally Posted by dark scorpio View Post

What is the advantage to setting it to warm?

"Warm" is usually closest to the D65 standard color temperature.

"The greatest obstacle to discovery is not ignorance  it is the illusion of knowledge." - Daniel Boorstin
"Our lives begin to end the day we become silent about things that matter.
" - MLK

cavu is offline  
post #8 of 11 Old 09-08-2009, 05:59 AM - Thread Starter
Member
 
dark scorpio's Avatar
 
Join Date: Jun 2009
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by Michael TLV View Post

Greetings

Contrast test on THX disc does not apply to CRT displays. You need a light meter for a CRT. 30 fL is the goal based on a 100% white window box pattern.

regards

light meter????

oh and does this also mean that the brightness test wasnt accurate?

I want to shoot my TV
dark scorpio is offline  
post #9 of 11 Old 09-08-2009, 09:43 PM
AVS Special Member
 
Michael TLV's Avatar
 
Join Date: Feb 2000
Location: THX/ISF Calibrationist/Instructor, Calgary, AB, Canada
Posts: 6,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Liked: 129
Greetings

The brightness test is fine with the drop shadow. The contrast test is designed for digital displays.

regards

Michael Chen @ The Laser Video Experience
ISF/THX/TLV Video Instructor
The Video Calibration Education Hub - www.TLVEXP.com

Michael TLV is offline  
post #10 of 11 Old 09-09-2009, 07:13 AM - Thread Starter
Member
 
dark scorpio's Avatar
 
Join Date: Jun 2009
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
it just seems odd that the test is only for hdtv's but has been around since Toy Story 1 & 2, back when nobody had an hdtv.

I want to shoot my TV
dark scorpio is offline  
post #11 of 11 Old 09-09-2009, 07:32 AM
Senior Member
 
Lee Gallagher's Avatar
 
Join Date: Mar 2006
Location: Phoenix, Arizona
Posts: 205
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
Quote:
Originally Posted by dark scorpio View Post

it just seems odd that the test is only for hdtv's but has been around since Toy Story 1 & 2, back when nobody had an hdtv.

You can see where not to set your contrast with the THX contrast pattern on a CRT. However, it isn't the ideal pattern to set contrast on these types of displays. If you see any blooming (the boxes become larger) then your contrast control is set too high.
Also remember that contrast and brightness are interactive. If you adjust one, be sure to check and re-adjust the other, if necessary.

Lee Gallagher
Imaging Science Professional
THX Certified Professional

Advanced Audio Visual
www.advancedaudiovisual.tv
Lee Gallagher is offline  
Reply Display Calibration

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off