Difference between revisions of "Talk:High Definition Disk Formats"

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The quality difference is easily discernible on a large screen or when comparing the two next to one another.  Subjecting *any* digital media to a transcode, especially one which cuts bitrate to a quarter of the original, results in a loss of visual quality.  Whether it's discernible to your eyes on your particular screen is immaterial.  At identical resolutions and processing, bitrate is the mathematical expression of quality.  Think of the Blu-ray as "Copy one."  Turning that into a pirated movie (and thus, in most cases, reducing the bitrate down to something close to 10 Mbit/s) requires another transcode, which is making a "copy of a copy."  So you have quality loss associated with the bitrate reduction, and quality loss associated with adding an extra transcode into the mix.  Perception is, as you say, up to the viewer.  That'll be affected by quality of screen, output resolution, output cabling, user standards, etc.  Mathematically, however, the quality of a Blu-ray download is heavily compromised (in most cases-- there are instances where entire direct rips are available, untranscoded-- these are usually 20-30 GB).  --[[User:Iamlindoro|Iamlindoro]] 17:41, 20 February 2008 (UTC)
 
The quality difference is easily discernible on a large screen or when comparing the two next to one another.  Subjecting *any* digital media to a transcode, especially one which cuts bitrate to a quarter of the original, results in a loss of visual quality.  Whether it's discernible to your eyes on your particular screen is immaterial.  At identical resolutions and processing, bitrate is the mathematical expression of quality.  Think of the Blu-ray as "Copy one."  Turning that into a pirated movie (and thus, in most cases, reducing the bitrate down to something close to 10 Mbit/s) requires another transcode, which is making a "copy of a copy."  So you have quality loss associated with the bitrate reduction, and quality loss associated with adding an extra transcode into the mix.  Perception is, as you say, up to the viewer.  That'll be affected by quality of screen, output resolution, output cabling, user standards, etc.  Mathematically, however, the quality of a Blu-ray download is heavily compromised (in most cases-- there are instances where entire direct rips are available, untranscoded-- these are usually 20-30 GB).  --[[User:Iamlindoro|Iamlindoro]] 17:41, 20 February 2008 (UTC)
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The page mentions two formats: EVO and M2TS -- but doesn't describe much about how to play M2TS.  Can anyone address this?

Revision as of 00:32, 12 May 2008

"The advantage to this method is that the quality is vastly superior when viewing an untranscoded rip."

Hardly "vastly superior", I think that is just opinion rather than fact. Having downloaded Bluray movies prior to purchasing, I have been surprised to find little difference in quality on-screen. Perhaps technically, the quality is very much different due to sheer bitrate differences, but on-screen I can't tell. If you need to stand 2 feet away from the screen or compare frames individually, then that isn't "vastly". --Stalks 01:03, 20 February 2008 (UTC)

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The quality difference is easily discernible on a large screen or when comparing the two next to one another. Subjecting *any* digital media to a transcode, especially one which cuts bitrate to a quarter of the original, results in a loss of visual quality. Whether it's discernible to your eyes on your particular screen is immaterial. At identical resolutions and processing, bitrate is the mathematical expression of quality. Think of the Blu-ray as "Copy one." Turning that into a pirated movie (and thus, in most cases, reducing the bitrate down to something close to 10 Mbit/s) requires another transcode, which is making a "copy of a copy." So you have quality loss associated with the bitrate reduction, and quality loss associated with adding an extra transcode into the mix. Perception is, as you say, up to the viewer. That'll be affected by quality of screen, output resolution, output cabling, user standards, etc. Mathematically, however, the quality of a Blu-ray download is heavily compromised (in most cases-- there are instances where entire direct rips are available, untranscoded-- these are usually 20-30 GB). --Iamlindoro 17:41, 20 February 2008 (UTC)

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The page mentions two formats: EVO and M2TS -- but doesn't describe much about how to play M2TS. Can anyone address this?

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