Digital TV What You Need To Know.
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Digital TV: What You Need to Know
Overview
Digital TV is here, and it's important to know how to prepare for the transition. This guide will help you understand what you need to know.
Understanding Analog TV
Traditional televisions operate on analog signals, encoding picture and sound continuously, drawing entire frames at once. Even when there's no new information, analog signals keep transmitting.
The Shift to Digital TV
Digital TVs use digital signals, a revolutionary technology set to replace analog systems. These signals are transmitted as computer code in the form of ones and zeroes, offering greater efficiency and less interference, resulting in superior picture and sound quality.
Benefits of Digital TV
Digital transmissions use significantly less bandwidth. This efficiency allows for additional digital channels and services like pay-multimedia, multicasting (multiple programs on one channel), electronic program guides, and interactive features.
Digital TV Quality Levels
Digital TV is available in several quality tiers:
1. Standard Definition TV (SDTV): Offers quality comparable to today's analog television.
2. Enhanced Definition TV (EDTV): Provides improved quality with Dolby digital surround sound.
3. High Definition TV (HDTV): Delivers the highest quality picture with Dolby digital surround sound.
Current Broadcasting Landscape
Most U.S. TV stations broadcast both digital and analog signals, so you can watch your favorite shows regardless of your TV type. However, after February 17, 2009, full-power stations will cease analog broadcasts.
Transitioning from Analog to Digital
If you own an analog TV, you'll need a digital-to-analog converter box or a new digital TV to continue watching. The National Telecommunications and Information Administration (NTIA) offers $40 coupons to qualifying households to help purchase a converter box. For eligibility details, visit [ntia.doc.gov](http://www.ntia.doc.gov).
Note: While a converter allows you to view digital broadcasts on an analog TV, the quality won't be fully digital.
Receiving Digital TV
Digital TV is accessible over the air with a standard antenna, digital cable, or satellite. Regardless of how you receive your signal, you'll need a digital converter or a digital TV for viewing.
In Technology with You,
Adam White
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