Will an HDMI up-convert receiver improve picture quality

[Kees77]

Hello

I just installed a Yamaha HTR6080 receiver and am debating whether to buy a DVI to HDMI cable to go to my sony projection TV (DVI input, 720P/1080i) from the receiver. I do not have an HD satellite or DVD player and currently use Component Cables from my DVD player and Satellite Receiver. Would the up convert feature truly improve image quality on DVD's and satellite tv. I've searched for info on this feature and find more info on the up convert DVD players. What's your take on the receivers and my set up?

Thanks for you help.

 

[Seth=L]

I would guess the HTR-6080 has a pretty basic scaler, but you could give it a shot and see how it does.

What make and model is the television?

 

[Kees77]

My TV is a 51" Sony KP 51WS520 - rear projection TV. What type of gain can I expect?

Cheers

 

[no. 5]

What type of gain can I expect?

DVDs and non-HD material is 480i, no amount of processing can add detail that was never there.

Have you done any calibration to the TV? Better colors and grayscale do more for picture quality than resolution.

 

[Seth=L]

That looks to be a slightly older set, so it is pretty likely that the scaling in the HTR-6080 will be superior to that of the TV. (all HDTVs have scalers, because they have to display at their native resolution. So a 480i input would be scaled to the display's native resolution of 1080i.)

 

[Seth=L]

DVDs and non-HD material is 480i, no amount of processing can add detail that was never there.

Have you done any calibration to the TV? Better colors and grayscale do more for picture quality than resolution.

Scaling has it's fine points, it can make standard Def material look better.

 

[no. 5]

all HDTVs have scalers, because they have to display at their native resolution.

From what I've read (not much, information on CRTs is hard to find), some CRT based HDTV treat HD and SD content differently than fixed pixel displays; 480i and 480p being displayed as 540p, and 720p and 1080i being displayed as 1080i.

Scaling has it's fine points, it can make standard Def material look better.

Oh I agree, but scaling can't add what was never there.

 

[Seth=L]

Oh I agree, but scaling can't add what was never there.

Agreed, but it can make it look better.

Oh, what about fixed pixel displays? I thought that CRTs are fixed as well?

 

[mouettus]

Agreed, but it can make it look better.

Oh, what about fixed pixel displays? I thought that CRTs are fixed as well?

Depends on what CRT you have.

TVs are fixed. But think about your computer monitor that can change resolution. Damn that picture quality miss me

 

[no. 5]

Oh, what about fixed pixel displays? I thought that CRTs are fixed as well?

They can be if the manufacture chooses to, but unlike a fixed pixel display which has a resolution that is limited by the number of physical pixels, a CRTs resolution is limited by how tightly the electron beam can be controlled.
A CRT can change the size of pixel it's displaying to allow different resolutions to be displayed without need for scaling. Not that they all do, however.

Old information on CRT HDTVs... but '04 is when CRT displays were still around.

 

[mtrycrafts]

They can be if the manufacture chooses to, but unlike a fixed pixel display which has a resolution that is limited by the number of physical pixels, a CRTs resolution is limited by how tightly the electron beam can be controlled.
A CRT can change the size of pixel it's displaying to allow different resolutions to be displayed without need for scaling. Not that they all do, however.

Old information on CRT HDTVs... but '04 is when CRT displays were still around.

NTSC type CRTs has 525 scanned lines in interlaced mode, but not all are utilized for video info that we see. It has 480 lines, hence the 480i, 240 every 1/60 of sec. If that is in progressive mode you still have only 480p. Not sure where the link gets 540 lines. CRTs also have rasters and color phosphor that the beam excites. These are also of fixed size and number.
A CRT that displays more must have smaller holed in the rasters and more colored phosphors to excite to display. Some could accept other video signals and internally scale it to the TVs display capability. So, in essence, a CRT also has a designed in limits of resolution.
But, I could be way off

 

[TLS Guy]

Hello

I just installed a Yamaha HTR6080 receiver and am debating whether to buy a DVI to HDMI cable to go to my sony projection TV (DVI input, 720P/1080i) from the receiver. I do not have an HD satellite or DVD player and currently use Component Cables from my DVD player and Satellite Receiver. Would the up convert feature truly improve image quality on DVD's and satellite tv. I've searched for info on this feature and find more info on the up convert DVD players. What's your take on the receivers and my set up?

Thanks for you help.

If you do that I doubt you will get a picture. I have fielded a few questions about that. Once you put the receiver in an HDMI loop you have to have repeated handshakes of the six digital keys. I can tell from peoples problems that once you use a DVI adapter, it will not transmit the repeated six digital keys required. Unfortunately you will have to purchase a projector HDCP compliant to the latest specifications. That will keep you current for about six months!

http://forums.audioholics.com/forums/showthread.php?t=39089

 

[no. 5]

NTSC type CRTs has 525 scanned lines in interlaced mode, but not all are utilized for video info that we see. It has 480 lines, hence the 480i, 240 every 1/60 of sec. If that is in progressive mode you still have only 480p. Not sure where the link gets 540 lines. CRTs also have rasters and color phosphor that the beam excites. These are also of fixed size and number.
A CRT that displays more must have smaller holed in the rasters and more colored phosphors to excite to display. Some could accept other video signals and internally scale it to the TVs display capability. So, in essence, a CRT also has a designed in limits of resolution.
But, I could be way off

Are you ever way off?

Would a CRT made for ATSC content be different? My assumption was something like this: 540 lines of phosphor "pixels" on the screen and the electron beam being able to go "wide" and energize the whole phosphor, or "narrow" and energize half the phosphor, therefore allowing 540 lines or 1080 lines.

But I'm just guessing.

 

[Kees77]

Wow

You guys amaze me. I thought i was smart but you made me feel like a 5th grader. I'll be trying the up convert feature and let you know how it goes. I'm hoping it will be a noticeable difference.

Thanks all