Editing Digital television (section)

=== Effects of poor reception ===
Changes in signal reception from factors such as degrading antenna connections or changing weather conditions may gradually reduce the quality of analog TV. The nature of digital TV results in a perfectly decodable video initially, until the receiving equipment starts picking up interference that overpowers the desired signal or if the signal is too weak to decode. Some equipment will show a garbled picture with significant damage, while other devices may go directly from perfectly decodable video to no video at all or lock up.<ref>{{Cite web |date=2013-09-25 |title=Digital TV Info |url=https://www.antennadirect.com.au/digital-tv-info/ |access-date=2022-07-22 |website=Antenna Direct |language=en-US}}</ref> This phenomenon is known as the digital cliff effect.<ref>{{Cite web |date=2010-03-01 |title=Steering clear of the digital cliff |url=https://connectedmag.com.au/steering-clear-digital-cliff/ |access-date=2024-01-05 |website=Connected Magazine |language=en-AU}}</ref>

[[Block error]]s may occur when transmission is done with compressed images. A block error in a single frame often results in black boxes in several subsequent frames, making viewing difficult.

For remote locations, distant channels that, as analog signals, were previously usable in a snowy and degraded state may, as digital signals, be perfectly decodable or may become completely unavailable. The use of higher frequencies add to these problems, especially in cases where a clear line-of-sight from the receiving antenna to the transmitter is not available because usually higher frequency signals can't pass through obstacles as easily.