The key difference between DVD and Blu-ray/HD-DVD is that DVD is a standard definition format in which disc information is encoded in 480i resolution, while Blu-ray/HD-DVD disc information can be encoded up to 1080p.
Definition of Understatement. Understatement is way of speaking which minimizes the significance of something. When using understatement, a speaker or writer often employs restraint in describing the situation at hand and uses an expression with less emphasis or strength than would be expected.
Understatement is generally intended to be humorous. However, the use of understatement can also be modest or polite, since it can downplay things that it would be boastful or inappropriate to say directly. Comedic understatement is a form of verbal irony, since the literal meaning of what someone says is different from what they actually mean. The opposite of understatement is overstatement, in which a statement is made with more strength than is actually warranted. How to Pronounce Understatement