The DTV standard has introduced its share of headaches, but it might actually eliminate one: the migraine viewers get from inconsistent audio levels. It is a scenario familiar to anyone who has wielded a remote: You change the channel, and the sudden bump in volume rattles your brain. The audio portion of the digital-television transmission standard has a feature called Dialnorm, which brings the audio levels of all HDTV- and DTV-delivered channels within the same range, so viewers no longer have to adjust the volume as they channel-surf.
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