AVS Forum Addicted Member
Join Date: Jan 2001
Location: upstate NY
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DVDs have a resolution of 768x480 (if they're NTSC; PAL and SECAM are 768x540). That's less than half the maximum HD resolution of 1920x1080. When DVDs have been recorded by carefully converting a high quality HD or film source, they can look very good indeed, better than Blu-ray discs which have been generated from poor sources, or than highly compressed "HD" cable video.
On the other hand, if a DVD was mastered from a VHS tape (I have a commercial pressing like that), it can look absurdly bad.
Marantz SR7009 avr + MM9000 amp --> Atmos 7.1.4
Fronts=NHT 2.9+AC2, FH+TM=DefTech PM1000, LCR+TM amped