AT&T Community Forums

screen is way too dark on HDMI

photo 1.JPG this is component cable see how you can clearly see everything in this movie now watch this when i switch too HDMI scroll down thanks

photo 2.JPG now this is HDMI you can see a big diffrence between component and HDMI this is a big problem with the Att reciver that needs too be fixed i dont want too watch my shows on low quality component

Please call **** this is a issue i want too know is being worked on or can not be fixed

Another good example for people who think its just the show i will post 2 more photos first is component

second picture is HDMI on reciver

component on reciver

130$ aduio quest HDMI cable on reciver as you can see there is a grahpic bug on the reciver

would like too know whats up with that component cables are too slow for the sony TV so it has a

lag too the picture

[edited for privacy-please do not post personal information]

4 Attachments

photo 1.JPG

photo 2.JPG

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Responses

adambird

Tutor

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8 Messages

10 years ago

Sent from my iPhone

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JefferMC

ACE - Expert

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35.1K Messages

10 years ago

@mac1679 wrote:

...

Anyway, I completely agree we are not getting out monies worth from att. I have made my concerns well known with tech support but 99% of them ('my thoughts' excluded) are less than no help. They read from their que cards and don't know anything about the inner workings of the uverse sysytem. I realize this wasn't a very productive post on my part, just wanted to let you know you aren't alone in this battle. Lets hope for the best in the next software update so we can get what we pay for.

The issue is that there are two ways of interpreting the numeric color values in the HDMI spec. One interpretation uses all of the possible values in one 8 bit octet, or byte. The other interpretation ignores the difference in the values from 0-15 (treating them all as 0) and 240-255 (treating them all as 255). You get crushed blacks when the receiver and the TV use different intepretations. Sometimes your TV will have "black level" setting you can change that will correct this by matching the receiver's interpretation. As will Component Cabling of good quality, by avoiding this HDMI spec issue. As you have found, the quality of your HDMI cable will not correct this issue.

The really sad thing is that this problem existed in the first generation of U-verse TV receivers and was fixed in firmware. Then they came out with a new generation of receivers and the problem returned for the new generation.

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