Here is a comparison of the first three minutes of the 12th season show "School for Assassins" between a dub taken from a TV broadcast and the remastered DVDs. Much of the TV dub is almost unwatchable, despite the fact it was taken from KONG-TV in Seattle, which ran syndicated prints that were virtually complete. The TV broadcast copy was dubbed from an original recording to a second tape to cut out the commercials, then copied again from the resulting VHS tape via some USB gizmo to my computer, then converted to an AVI file and a subsequent FLV (Flash video) file and then to an MP4 file (as was the DVD dub for the last two steps). Still, there is a point to be made...
TV BROADCAST
DVD