With virtually imperceptible quality degradation, MPEG-2 can reduce this to 16M bit/sec for contribution-quality video -- used during the editing process -- and to 4M bit/sec or 5M bit/sec for distribution-quality video as received by end users.

• MPEG-2能在质量降低到实际观察不到的境况下，把传输率降到16兆位/秒（编辑过程中用的投稿质量视频）和4兆或5兆位/秒（最终用户收到的分配质量视频）。