ATSC is the family of digital television standards used in North America. It defines how broadcast TV is encoded, transmitted, and decoded by receivers, including channel structure, compression, and signal framing. In practice, ATSC is what lets televisions, set-top boxes, and tuners turn over-the-air radio signals into digital video and audio.
In cyber security, ATSC matters because broadcast systems are a mix of long-lived hardware, firmware, and parser logic. Weaknesses can appear in tuner software, demodulators, or media-processing code that handles malformed or unexpected signals. Defenders care about ATSC compatibility when updating receivers, validating firmware, and planning transitions between standards, because old devices may fail or misbehave when the ecosystem changes. Even without a classic network intrusion, broadcast standards can create operational risk if devices cannot safely process the input they receive.