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INTERACTION DESIGN PRINCIPLES FOR INTERACTIVE ...

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BROADBAND<br />

A network capable of delivering high bandwidth, used by Internet and cable television<br />

providers.<br />

DIGITAL TELEVISION (DTV)<br />

DTV, which will ultimately replace the analog NTSC signal in the U.S., uses digital<br />

modulation and compression to broadcast video, audio and data signals. DTV allows for<br />

more channels to be carried in the same amount of bandwidth, high definition<br />

programming, and a switchover to the 16:9 aspect ratio.<br />

DIGITAL VIDEO RECORDER (DVR)<br />

A DVR records television programming onto a hard disk in digital format, which enables<br />

users to time-shift through recorded media. Commercial examples include TiVo and<br />

ReplayTV.<br />

ELECTRONIC PROGRAMMING GUIDE (EPG)<br />

An EPG allows viewers to have interactive access to television broadcast schedules and<br />

additional information about programs. Additional functionalities and features, depending<br />

on the device and service, can include one-touch recording, program summaries, search<br />

by genre or channel, immediate access to the selected program, reminders, picture-in-<br />

picture, and parental control functions.<br />

ENHANCED TELEVISION (ETV)<br />

See Interactive Television<br />

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