Why Xbox Live Video Marketplace Competes Well Visually With HD-DVD

 I have to point out going into this I was expecting that Xbox Live Video Marketplace to be better than DirectTV, but to pale next to HD-DVD.  This doesn’t appear to be the case anno 1800 where to download.

What Marketplace got right:

Lets start with the Basics.  HD-DVD has the potential to be 36.55 Megabits per second, but tends to average about half of that.   Marketplace videos or at least the one I checked out ‘V for Vendetta’ Is 6.5 Megabits VBR.  Account for 720p vs 1080p and you are looking at about 2.25 more pixels so pixels per bit the two are pretty close bluetooth for laptop for free german.

Above is a Graph of the Delta in Signal to Noise between “V” on HD-DVD and from marketplace.  0 is when there is no difference between the two.   The spike that hits -17.5 and the spike that hits 21.5 are places where the Cadence of the output were not quite lined up (the content is encoded at 23.976 FPS and was captured at 59.94)

From the graph you can see there is very little difference between the two files.  The spot with the highest differential is an explosion herunterladen.

Which looks pretty good on both encodes.  Certainly not what I would call much in the way of quantization artifacts (macroblocking) java runtime environment herunterladen.

Macro block ExplosionMacro block Explosion

Here is that same frame from Marketplace with just the Blocking visible herr der ringe fonten for free.

There is some blockiness amount the edge of the letterbox.  But other than that there isn’t much to see.

Most of what you are missing in the Marketplace version of the file is Film Grain and noise Download apps.

This differenced frame shows that other than noise there isn’t much missing.  Perhaps a little crispness around the edges, but the Noise Reduction on your display would have taken that out anyway herunterladen.

Interestingly, the Marketplace version of the content which does block a bit more during explosions and high motion, actually does better in scenes following lots of action.  This is probably the result of the VBR mode the HD-DVD was encoded in, or some scene by scene reprocessing that was done to make the explosions look better.   (Green is HD-DVD, Red is Marketplace VOD, Lower is better). 

What isn’t quite right:

The above image shows the only complaint I do have with the Marketplace encode.  The Black levels are wrong.  This is most likely  because the Marketplace encode is done in the 601 color space instead of the 709.  I did my own encode from the HD-DVD source and the result was similar.   I also feel that the Content should have been encoded Cropped so that the Black bars of the letter boxing would not have used up valuable bits, but also to prevent noise in the letterboxing videos gratisen.

So what does this all mean to you the end user?

HD-DVD is spectacular I was unable to find a single artifact in the copy of ‘V’ the same was true for Tokyo Drift which is rather hard content to encode.  Marketplace videos on most TV’s in most home theatres, also spectacular.   You being the Video enthusiast and cocky SOB that you probably think you have a home theatre that the quality difference will matter, well you are probably wrong etka download deutsch kostenlos.

Unless you have:

A 1080p Display, that really runs at 1920×1080 as its native resolution. 

Have paid someone to calibrate the TV to reference, not the Dynamic, or Vibrant mode that many TV’s are set to. 

Have disabled noise reduction on your TV logisim herunterladen.

Are Viewing in a theatre lit room.

You are deluding yourself if:

You want to argue that your 1080i display would take advantage of this.

You don’t have a 1080i display they don’t exist.   I have one at work it weighs 300 pounds and is only 23 inches.  Everyone that has a non-CRT has a progressive display, those 1080i in’s are scaled to something.

You want to argue that you calibrated your display and can do a better job than the technician from Samsung.

I calibrated my display using professional gear including a sensor that measure’s NIT, Lumens, Color Temperature, and about 20 other variables, it took me 20+ hours I should have paid the technician the $300.  Do you know what NIT is?  No? then you didn’t do a better job. 

How this was done:

The output of the Xbox was captured via Component, and saved as uncompressed RGB files at 59.94 FPS 720p.  This does disadvantage the 1080p content, but not for most home displays.  The files were then analyzed using VQM software from Compression.Ru.  Other analysis was done using AVISynth, and VirtualDub.