As UHD tv's come out and the continuing improvement to 3d, dvd will not stay around any longer, but blu-ray will for some time.
- Blu-ray > DVD.
- You can still get blu-rays cheap, best buy tends to have sales the most where the price drops to $9.99 or $5.99 or $3.99 and best buy has this deal every so often where every dvd you trade in you get $5,00 off from a blu-ray purchase.ect
= You will not notice the difference without having a hd-tv, hd-receiver+with surround speakers, using a hd cable like hdmi, and using a device capable of outputting+playing hd disk/file.
Blu-ray.
- Can be up to 1920x1080 resolution (16:9 aspect ratio) = 2,073,600 pixels. Can support bit depths (color quality) up to 48-60, and soon produces will start using higher fps/hz than DVD's.
- Can be up to 7.1 at 24 bit/sample depth and 96,000 hz sample rate OR 5.1 surround sound at 24 bit/sample depth and 192,000 hz sample rate. = Surround sound formats: Up to DTS-HD-MA at 24.5 Mbps OR up to Dolby TrueHD at 18.0 Mbps OR DTS-HD-HR/Dolby Digital Plus up to 6.0 Mbps OR DTS at 1,536 kbps (or 1,509 kbps) OR Dolby Digital at 640 kbps.
DVD.
- Can be up to 720x480 (NTSC countries) resolution (3:2 aspect ratio) = 345,600 pixels OR up to 720x576 (PAL/SECAM countries) resolution (5:4 aspect ratio) = 414,720 pixels. Can support bit depths (color quality) up to 8-24-32, and fps/hz up to 24p or 30p / 50i or 60i.
- Can be up to 5.1 surround sound at 24 bit/sample depth and 48,000 hz sample rate. = Surround sound formats: Up tp DTS at 1,536 kbps (or 1,509 kbps, but I think on DVD it may only be 768 kbps or 512 kbps for DTS) OR up to Dolby Digital at 448 kbps.