atapul
I have a movie projector with 1024x576 native resolution. I play DVD's with it. Regular TV seems to grainy so I don't do it. Would Blu Ray player make any difference? Is the projector's resolution high enough to make a distinction between DVD and BluRay or would I have to replace my projecor with a higher resolution TV or another projector to get some benefits from a bluray upgrade? And what is a native 1024x576 anyways? what is native about it?
And can someone please tell me what the resolution is for a standard US DVD vs BluRay? I want to see where my projector stands in between...
Answer
As it stands... DVD's only output at 720x576 at a maximum in terms of pixel resolution. US which primarily uses NTSC DVDs output frames of 720x480 at 60hz which achieves about 29fps. EU PAL DVDs achieve the higher resolution of 720x576 but subsequently only at 50hz or about 23fps due to data constraints on SCART/Composite/Component. A Blu-Ray disk will offer a resolution of 1920x1080 at 100hz which is just shy of 60fps. Plus, blu-ray supports progressive scan where each image is built up from first to last pixel as opposed to interlacing used in DVD whereby the even lines are built up in one cycle followed by the odd lines (or vice versa i dont remember which)
1st, a Blu-Ray player, on paper, would make a difference, though it would only be a negligable difference. Its called a native 1024x576 since that is the resolution it is designed for. It will be able to handle lower resolutions for the visually impaired but a resolution of 640x480 would not be 'native'. Since a US DVD only outputs at 720x480 then you would be able to get more out the projector from a blu-ray source. But it would be wasted in that a blu ray will do 1920x1080.
If you choose to upgrade to blue ray you need to invest in the source (blu ray player, PS3, etc), the output (HDTV, HD projector - not sure if or where you can get them), and the connectivity (HDMI cable). If you get a good source and output, dont be tempted by a cheaper cable. Insufficient connectivity will destroy the benefits of blu ray. Invest in a cable that can carry the 4.95 Gbps that blu ray requires, such as a 750 series monster cable :)
As it stands... DVD's only output at 720x576 at a maximum in terms of pixel resolution. US which primarily uses NTSC DVDs output frames of 720x480 at 60hz which achieves about 29fps. EU PAL DVDs achieve the higher resolution of 720x576 but subsequently only at 50hz or about 23fps due to data constraints on SCART/Composite/Component. A Blu-Ray disk will offer a resolution of 1920x1080 at 100hz which is just shy of 60fps. Plus, blu-ray supports progressive scan where each image is built up from first to last pixel as opposed to interlacing used in DVD whereby the even lines are built up in one cycle followed by the odd lines (or vice versa i dont remember which)
1st, a Blu-Ray player, on paper, would make a difference, though it would only be a negligable difference. Its called a native 1024x576 since that is the resolution it is designed for. It will be able to handle lower resolutions for the visually impaired but a resolution of 640x480 would not be 'native'. Since a US DVD only outputs at 720x480 then you would be able to get more out the projector from a blu-ray source. But it would be wasted in that a blu ray will do 1920x1080.
If you choose to upgrade to blue ray you need to invest in the source (blu ray player, PS3, etc), the output (HDTV, HD projector - not sure if or where you can get them), and the connectivity (HDMI cable). If you get a good source and output, dont be tempted by a cheaper cable. Insufficient connectivity will destroy the benefits of blu ray. Invest in a cable that can carry the 4.95 Gbps that blu ray requires, such as a 750 series monster cable :)
Can a 16:9 aspect ratio projector display a 720p hd resolution?
Dallas247
My projector has a 1024 x 768 Native Resolution which I have been told is equivalent to 720p. However, I have also been told that on a 4:3 screen a 1024 x 768 Native Resolution (720p) cannot be displayed without cropping down the image and reducing the resolution.So the projector basically down-scales the image quality to fit on the screen. What I want to know is will a 16:9 aspect ratio be able to display 720p without cropping the image down and loosing hd quality. Thanks so much
PsychologyGuy:
No, I dont mean black bands on the sides of the image. I do not have the projector yet, It is being shipped. But, What I mean by down-scaling is the resolution. So just the basic image quality. Like pixel-wise i guess you could say. Uhm ya someone online told me this information, So i could be completely wrong. Help is appreciated.
Answer
The first respondent stated:
"The resolution you are talking about is width by height. You can have a display that is 1024x768 that is <720p, 720p, or 1080p."
This is not accurate. This is why.
For the last few years we have heard the numbers 720 and 1080 used frequently when discussing high definition images. But what do those numbers mean? Well, those numbers represent the number of rows of pixels that make up the display or image. An "HD 720" display has 720 rows of pixels available and happens to have 1,280 columns of pixels. An "HD 1080" display has 1,080 rows of pixels with 1,920 columns. As you see, there are more columns than rows. This is what makes the image wider than tall. Both HD 720 and HD 1080 are 16:9 ratio.
A 1024 x 768 resolution happens to be a computer resolution. This resolution is called XGA and happens to be a 4:3 ratio as opposed to the 6:19 ratio you get with 720 and 1080.
Having said this, let's look at how an HD 720 image will fit within a 1024 x 768 display.
Of course the 720 rows of pixels found in the image will fit within the 768 rows the display is capable of producing. But the 1,280 columns of pixels of an HD 720 image will obviously not fit within the 1024 columns the display is capable of producing.
This means that 256 columns of pixels (128 columns on each side of the HD 720 image) will be cropped off the image to fit onto the 1024 x 768 display. Either that, or the pixel density can be adjusted so that the HD 720 image can image can fit. But unfortunately, by doing so, you no longer have a true HD 720 image and this is where you get the black lines on the top and bottom of the screen known as letter boxing.
PsychologyGuy also said...
"that is more of an issue with the fact that most things (even brand spankin new LCD/LED televisions) don't utilize precise 16:9 aspect ratios. For example, I have a Samsung 6 series widescreen LCD TV that still has the banding on 16:9 movies."
This is also not true. If you do the math, HD 720 and HD 1080 are both precisely 16:9 ratios. The reason why his TV still has the letter boxing (black bands on top and bottom) is because movies are not filmed in 16:9 ratio, but instead a 2.40:1 ratio is used.
When displaying a 2.40:1 ratio image (which is more than twice as wide as the hight of the image) on a 16:9 display (which has a width less than double the height) the picture must be shown in letterbox format in order to prevent picture distortion or cropping.
The first respondent stated:
"The resolution you are talking about is width by height. You can have a display that is 1024x768 that is <720p, 720p, or 1080p."
This is not accurate. This is why.
For the last few years we have heard the numbers 720 and 1080 used frequently when discussing high definition images. But what do those numbers mean? Well, those numbers represent the number of rows of pixels that make up the display or image. An "HD 720" display has 720 rows of pixels available and happens to have 1,280 columns of pixels. An "HD 1080" display has 1,080 rows of pixels with 1,920 columns. As you see, there are more columns than rows. This is what makes the image wider than tall. Both HD 720 and HD 1080 are 16:9 ratio.
A 1024 x 768 resolution happens to be a computer resolution. This resolution is called XGA and happens to be a 4:3 ratio as opposed to the 6:19 ratio you get with 720 and 1080.
Having said this, let's look at how an HD 720 image will fit within a 1024 x 768 display.
Of course the 720 rows of pixels found in the image will fit within the 768 rows the display is capable of producing. But the 1,280 columns of pixels of an HD 720 image will obviously not fit within the 1024 columns the display is capable of producing.
This means that 256 columns of pixels (128 columns on each side of the HD 720 image) will be cropped off the image to fit onto the 1024 x 768 display. Either that, or the pixel density can be adjusted so that the HD 720 image can image can fit. But unfortunately, by doing so, you no longer have a true HD 720 image and this is where you get the black lines on the top and bottom of the screen known as letter boxing.
PsychologyGuy also said...
"that is more of an issue with the fact that most things (even brand spankin new LCD/LED televisions) don't utilize precise 16:9 aspect ratios. For example, I have a Samsung 6 series widescreen LCD TV that still has the banding on 16:9 movies."
This is also not true. If you do the math, HD 720 and HD 1080 are both precisely 16:9 ratios. The reason why his TV still has the letter boxing (black bands on top and bottom) is because movies are not filmed in 16:9 ratio, but instead a 2.40:1 ratio is used.
When displaying a 2.40:1 ratio image (which is more than twice as wide as the hight of the image) on a 16:9 display (which has a width less than double the height) the picture must be shown in letterbox format in order to prevent picture distortion or cropping.
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