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General discussion

Current HDMI-question

by hormeltom Mar 30, 2006 1:38PM PST

Other than the HP MD80N line of tvs, nothing else right now takes a true 1080p signal from HDMI. So my question is what happens in the following situation:

-blu-ray hooked up to a 1920x1080 native res (1080p) tv that cant accept true 1080p from HDMI. So we set Blu-ray to 1080i output through hdmi. So, the tv de-interlaces the image and makes it progressive......and my questions
1) is what I typed correct?
2) if so, how much compromise in picture quality are we looking at when a 1080p native displays true 1080p signal as opposed to 1080p native displaying a 1080i signal.

Discussion is locked

7 Posts
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Here's your answer...
by kena10 Mar 30, 2006 1:55PM PST

Blu-Ray (if outputting 1080p) will not downconvert any signals. What happens is that the BD player will send a 1080

- Blu-Ray player will send out a 1080p singal to the tv via HDMI

- The tv (since you mention it doesn't accept a true 100p signal), will downconvert the signal to 1080i and..

- Since the tv's resolution is actually 1080p, the tv will upconvert the signal it downconverted when the incoming signal from the blu-ray player went into the tv so it can actually match the tv's resolution.

Sounds confusing but it's going to be a 3-way operation. Of course this only takes fractions of a second to happpen but, in the end, you will not see any compromise in picture quality because the signal will be brought back to its original resolution in the end.

if anyone else like to add anything else, please do so.

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I c
by hormeltom Mar 30, 2006 10:26PM PST

That was informative, thanks. Anyone else care to confirm the answer?

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Current HDMI-question
by jcrobso Mar 31, 2006 12:04AM PST

Keep in mind that 1080i and 1080p are BOTH 1920x1080!!!
They have the same number of pixels!!!!
The difference is in how the frame is delivered!!!
This realy hard to answer since there are no Blue-Ray players on the market.
A lot depends on the what the TV does and this is a BIG what!!!
HDMI is suppose to have the HD-DVD/Blue Ray player and the TV talk to each other and come up with the best signal for the TV to display. So a lot realy depends on the needs of TV and what it can do, there is no one answer for all combonations.
I have two HD-TVs, a CRT-RP, it has 3 scan modes 540p for analog and DVD component signals, 720p and 1080i and a DVI input for computer.
The other is a CRT Direct view as it makes everthing progressive.
All PC DVD player software scan converts the video to the resoultion that the monitor is set for and displies it progressively. Some HDTV do this, some don't. John

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4674 GOTCHA
by stewart norrie Mar 31, 2006 7:03AM PST

Spent hours checking this out last nite . I found the only way You can get a 1080P picture is to use firewire from the blue ray player to your t.v. In closing I go to Frys to buy d.v.d. movies and small stuff like cables. also why are you bashing me all the time Iam not perfect , but Iam here to share technical information and Iam not always rite and I will post a reply saying so . Every time I post something You make a nasty remark back . Anyway If I offend you please let me know stewart

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4674 NOW I HAVE TO EAT CROW HA HA
by stewart norrie Mar 31, 2006 8:20AM PST

I got my information at Frys and circut, and a post I read here saying h.d.m.i. would not carry 1080P, well I called several hi-end home theater stores and was told h.d.m.i. will carry 1080P so sorry

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You're right
by kena10 Mar 31, 2006 3:13PM PST

However, you will not be able to hook up a blu-ray dvd player to a tv using i.LINK . It is my understanding that the ilink ports will only be used to transfer digital video from a video camera and or from other sources like a vcr or sacd player.

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4674 STILL PUZZLED
by stewart norrie Apr 1, 2006 5:36AM PST

After Iam done here Iam hedding to Frys and check these 1080P set up I was told they were using a firewire set up, but after reading your post I dont think so, Will let you know The good part if the blue ray looks as good as the 1080P demo does, using h.d.m.i. Then the few folks that have 1080P sets are going to love it have a nice day stewart

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