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Where Did Those "Black Bars" Come From? - Page 4

post #91 of 109
on the 5689S, is there a way to adjust the picture so that regular channels are stretched to fit the screen, this happens automatically on my LCD 5071
post #92 of 109
Thread Starter 
Quote:
Originally Posted by rav4man View Post

on the 5689S, is there a way to adjust the picture so that regular channels are stretched to fit the screen, this happens automatically on my LCD 5071

You can find out in the owner's thread for your model.

2007 Samsung LED Owner's Thread (HLT XX87/89S)
post #93 of 109
Comcast in Chicago -

seems like occasionally i notice captions or words near the bottom of the screen are cut off. especially noticeable on commercials. also, the station logos are usually cut off on the right edge. this is while viewing in HD. my TV letterboxes HD.

i'm using a Sony KV27HS420 27 Inch FD Trinitron Wega Hi-Scan TV w/Component 1080i.

any ideas? is it overscanning somehow? it seems the ratio is correct, so i'm not sure what to do about that.
post #94 of 109
Thread Starter 
Quote:
Originally Posted by briansemerick View Post

Comcast in Chicago -

seems like occasionally i notice captions or words near the bottom of the screen are cut off. especially noticeable on commercials. also, the station logos are usually cut off on the right edge. this is while viewing in HD. my TV letterboxes HD.

i'm using a Sony KV27HS420 27 Inch FD Trinitron Wega Hi-Scan TV w/Component 1080i.

any ideas? is it overscanning somehow? it seems the ratio is correct, so i'm not sure what to do about that.

Yes it's overscan. There has been overscan since day one of CRT based TV sets. I don't know your set, but I doubt that you can do anything about it. Overscan is used to protect viewers from static at the edges of the analog transmission. Maybe as we get further into the digital age, they will stop building overscan into displays.
post #95 of 109
yeah but it's not analog, it's HD. so there shouldn't be overscan because there is no caption track at the top, right? odd that it would still build that into the picture. oh well.
post #96 of 109
Thread Starter 
Quote:
Originally Posted by briansemerick View Post

yeah but it's not analog, it's HD. so there shouldn't be overscan because there is no caption track at the top, right? odd that it would still build that into the picture. oh well.

Overscan is designed into all TV sets. There are a few where you can reduce the overscan to almost zero. A Pioneer Kuro 1080p plasma receiving a 1080p or 1080i signal is one example. For almost all HDTV sets that's not possible.
post #97 of 109
thanks for the responses. i'm looking at Kuro's, so that's good to know.
post #98 of 109
i'm getting this cutoff on channels like ABC with their logo:



kinda hard to see, sorry - but look at the ABC HD logo - you can only see half the "H"

also, i'm getting text cutoff on most channels, but here's an example on TLC:



here's another one where you can barely make out the tips of words at the bottom that should be there:



here's my setup:




any ideas? or is this kind of overscan normal?
post #99 of 109
Thread Starter 
Quote:
Originally Posted by briansemerick View Post

any ideas? or is this kind of overscan normal?

All CRT direct view displays, like yours, have always has a large amount (5%-8%) of overscan. With newer technology, like thin panels and microchip RPTVs, the amount of overscan can vary quite a bit depending on how the displays are configured (0% -5%).

At some point in the future overscan should disappear.
post #100 of 109
should it really be overscanning that much on a digital source though? it's an HDTV, you'd think it would be smart enough to realize it doesn't need much if any. it's got ClearEdge enhancement - is that just sharpness or could that be a setting i could change to fix some overscan?
post #101 of 109
Thread Starter 
Quote:
Originally Posted by briansemerick View Post

should it really be overscanning that much on a digital source though? it's an HDTV, you'd think it would be smart enough to realize it doesn't need much if any. it's got ClearEdge enhancement - is that just sharpness or could that be a setting i could change to fix some overscan?

There are no displays that I'm aware of that can adjust the amount of overscan themselves. Some sets have options that you can select that will reduce overscan.

The 2007 1080p Pioneer Kuro plasmas have a setting that results in zero overscan if the input signal is either 1080i or 1080p. If the input signal is 720p these sets will switch to a mode with a small amount of overscan even though 720p is both digital and HD.
post #102 of 109
thanks for the info, i didn't realize that. dot-for-dot is the setting on Pio's right? That's what I'm getting in June.
post #103 of 109
Thread Starter 
Quote:
Originally Posted by briansemerick View Post

thanks for the info, i didn't realize that. dot-for-dot is the setting on Pio's right? That's what I'm getting in June.

That's right if you get a 1080p set.

If you select Dot by Dot, then the set will automatically switch to Full if the input isn't 1080i or P. I'm not sure what happens if you select Full and then input a 1080i or P signal. I think you will get a small amount of overscan and remain in Full size mode. I keep our 6010 in Dot by Dot mode, and our cable box set to output 1080i for all channels.
post #104 of 109
Thread Starter 
The following is quoted from "The Official Pioneer 9G Elite KURO Owner's Discussion Thread".

Quote:
Originally Posted by Frank J Manrique View Post

Can't believe that with all of the pertinent information that is available--and has for a long time--on the Internet regarding film and video transfers aspect ratios that many folks are still confused as to what they should be seeing on display devices. Am glad you make that distinction perfectly clear.

Simply put, the wider the film format a given movie was shot in, the wider the black bars above and below the active video area are going to appear...period. It was true with 4:3 TV sets, and still holds true with 16x9 displays.
Personally, I absolutely abhor TV channels that crop native aspect ratios to "fit the screen," even HD channels; it destroys the original intent of the movie directors' careful framing of their films, the ONLY exception being movies that were shot in Super35 (full aperture framing); these can be modified practically at will under the supervision of Directors for video mastering and subsequent transfers purposes.
Movies like T-2 and other Cameron's movies were shot in Super35 which for theatrical presentation were formatted in a bastard (as I call it being that is not true anamorphic lensing) "scope" format; these can be altered for video transfering without messing up the original framing intent.
True Lies is a good example of this; HBO had a new HD transfer of this movie done for them, which was aired in the 16x9 AR video format some time back--it looks absolutely gorgeous, and its framing suffers very little in the translation when compared to the "scope" version.
Oh, yes...as with SD widescreen transferred movies, the addition of 33% of more vertical lines of resolution also aids 16x9 transfers for after all black bars are ACTIVE video too! Man, I wish HD was anamorphically "enhanced"!

Anyway, the most extreme widescreen movies to be encountered are those that were filmed in Ultra-Panavision; 1959's Ben-Hur, The Greatest Story Ever Told, The Allelujah Trail, The Fall of the Roman Empire, and Mutiny on the Bounty are examples of this (a fairly recent transmission of Ben-Hur by Cinemax finally gave this glorious widescreen Epic its overdue HD treatment, something that can be sampled to a lesser extent in the magnificent DVD box set that Warners put out not long ago. Can't hardly wait Ben-Hur is given the Blu Ray treatment too! Oh, well...HD video tapes of that transmission and 35mm IB Technicolor road show plus S-8mm prints of this movie will keep me at bay until that happens. But now looks like am going to need a KURO to view it with! )...

-THTS

Quote:
Originally Posted by Frank J Manrique View Post

Happy to oblige!

You might also like to consider the following:

With a 16x9 (1:78:1) display movies shot in the "Academy Aspect Ratio" (1:34:1 but 4:3 or 1:33:1 on video) will normally show black bars to either side of the active image.

For films shot in Cinerama (a precious few, alas!) the AR would be 2:55:1...the very same AR Fox used to shoot their initial CinemaScope55 movies (The Robe, The King and I, et al) --black bars larger than "normal" scope films (35mm Panavision, CinemaScope, et al, 2:35:1 AR...subsequently 2:40:1 from the late 60s to the present) above and below the active image area will be displayed.

Spherical or "flat" 70mm (Todd-AO, Super-Panavision, et al) with an AR of 2:21:1 will show even smaller blacks bars.

"Flat" or spherical 35mm films (1:85:1 AR) will exhibit yet smaller bars...as will VistaVision, an 8-perf horizontal film format (movies like The Ten Commandments, The Buccaneer, Vertigo, West by Northwest, et al, were filmed in that superb 35mm optical format).

Movies that were filmed in the "flat" or spherical standard European format, which has a 1:66:1 AR, will show hardly any black bars.

And as stated in my post above, Ultra-Panavision (anamorphic Camera 65--70mm for practical purposes--2:76:1 AR) will display the most radical and dimensionally larger black bars of them all.

Super35, which is a wide open aperture 35mm film format, can be shown in just about any AR desired depending upon selected framing for both theatrical and video exhibitions, also stated in my previous post.

...and all video content shot in true HD (1:78:1 AR) will have no black bars to contend with, of course...

-THTS
post #105 of 109
Quote:
Originally Posted by htwaits View Post

If you know a film was transfered as "Anamorphic" then the correct aspect mode for a Sony GWIII LCD RPTV is "Full". In the same situation a Samsung HLN RPTV should have it's aspect mode set to "Wide" or "Wide (TV) depending on the input you are using. "Letterbox" would be set to "Zoom" on either one, and an old "4x3 Academy Ratio" film would be set to "Normal" on a Samsung.

The greatest benefit of anamorphic enhancement (not to be confused to be the same as the photographic anamorphic lensing process of film formats) for video applications is that 33% more VERTICAL lines of resolution are added back to the active image, which otherwise is resolution wasted by blacks bars...which are ACTIVE lines of resolution themselves.
This is something that even high-definition video SHOULD have been factored in at its inception for the very same reasons given above.

To sum up this little tirade, the greater the aspect ratio a given movie was photographed in, the greater the benefit afforded by anamorphic "enhancement" in terms of video reproduction...

-THTS
post #106 of 109
>>This is something that even high-definition video SHOULD have been factored in at its inception for the very same reasons given above.<<

Amen! Hi-Definition video should have an anamorphic mode for anything wider than 16x9 to maintain full vertical resolution. With Scope films the vertical resolution drops to only 700 or 800 lines (depending on exact AR) due to the letterbox bars and that creates a severe H/V inequality when compared to the horizontal resolution of 1920 pixels (with a 1125-line image - i.e. 1080p).

The other technical feature HD needs is "true" Constant Luminance performance - but that's another argument.
post #107 of 109
Quote:
Originally Posted by Disclord View Post

Amen! Hi-Definition video should have an anamorphic mode for anything wider than 16x9 to maintain full vertical resolution. With Scope films the vertical resolution drops to only 700 or 800 lines (depending on exact AR) due to the letterbox bars and that creates a severe H/V inequality when compared to the horizontal resolution of 1920 pixels (with a 1125-line image - i.e. 1080p).

The other technical feature HD needs is "true" Constant Luminance performance - but that's another argument.

Folks...he's absolutely right...do the math and see what would be gained by having anamorphically "enhanced" HD material!

I agree that Constant Luminance would be another real nice feature to have with HD content but heck, we're lucky if we even get TRUE HD transmissions 'cuz a lot of what is being passed as HD is anything but!
So for the time being we must rely on unenhanced optical (and tape) HD formats to obtain "the best that it can be"...

-THTS
post #108 of 109
Quote:
Originally Posted by RSawdey View Post

"Anamorphic" means 'different shape'... the wider image is horizontally compressed before recording, so it can be horizontally expanded on playback to full width. No effect on the vertical axis. You're still limited to the same number of pixels, but anamorphic has wide 4:3 pixels instead of square ones. The 'anamorphic' version of the film is output instead of the standard version when display type is set to 16:9 widescreen.

The anamorphic SD video enhancenment adds 33% of VERTICAL lines (or pixels depending on the display device being used) of resolution which otherwise is a percentage wasted in the reproduction of black bars above and below a given widescreen film; such bars are ACTIVE lines of resolution.

This should also apply to even HD movies because they also suffer the same problem as the wider the aspect ratio is, the lesser the vertical resolution becomes.
Had the powers-that-be factored-in such feature we would have greater resolution from all widescreen films transferred to HD video but, alas, that was not to be...

-THTS
post #109 of 109
Thread Starter 
It's been a long time since I posted here. The "black bar" questions still come up.
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