Quote:
Originally Posted by that1guypictures
Also, in compression, the bandwidth is the same when compressing 2 images or 1. Since Blu-ray is high enough to support 2 images at once without a large drop in quantity this isn't the biggest issue. But as we all know a higher bit rate can improve things at times, therefore, if the 2-D image is on a separate disc (like it is with Christmas Carol) you are getting the best 2-D and the best 3-D by separating the discs.
On films shorter than 90 minutes or so (and presented on a BD-50) a single disc holding both versions should be more than sufficient.
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3D Blu-Ray can support peak bitrates 50% higher then 2D Blu-Rays can support. 2D Blu-Ray limits the disc to 40 mps while 3D Blu-Rays allow you to go up to 60. A Christmas Carol is less then 2 hours and 2.35 (meaning vertical resolution is reduced 25% from full 1080p) therefore there is no reason they can't max out the bitrate from both 2D and 3D versions without needing two discs. Especially since Monsters vs Aliens 3D has an average bitrate less then 30 mps yet preserves all the detail and quality of the 2D Blu-Ray.