It looks similar because it is. DVDs use MP2 lossy compression.
There are a lot of variables at work here. CRT I assume that this is an analog SD TV VRS your 46" HDTV.
DVDs are 720x480(ED) or so pixels, the analog TV is somewhat less than that, the DVD player has to down scale the video and convert to analog to view on your CRT-TV.
For the HDTV are you using component cables or HDMI???
Anyway the DVD will send the 720x480 MP2 to the HDTV, the HDTV will rescale this to it's native resoultion of 1280x720 or 1920x1080, to do this is uses dithering.
Some HDTVs do a good job of this and some don't. Many are using a upscaling DVD player to help out with this problem. John
I have a Samsung 4663 (46'') widescreen HDTV. Lately I have been noticing during darker parts of a movie (on DVD) I can barely make out what I'm looking at. It seems like there are different levels of colors (halos). For example: If I am watching a night scene with a light in the middle, the light projected on the wall behind it shows up in layers. The first circle is the brightest and then there is a sharp line between this halo and the next which is a little darker and this continues a few times until there is no light to see. It looks similar to dithering, but I really don't think it is this. I used the same DVD on a (crt) TV with a DVD player and it looks fine. I also eliminated the DVD player by using another one on my Samsung. Does anyone know what causes this; or better yet how to fix it?