digital signage GLOSSARY

HDMI

HDMI (High-Definition Multimedia Interface) is the dominant audio-video connection standard between digital signage players and displays. A single HDMI cable carries video, audio and control signals, making it the practical default for external media players (BrightSign, Fire TV Stick, mini-PCs) connected to professional displays or consumer-grade TVs.

Current HDMI versions support increasingly demanding content: HDMI 2.0 handles 4K at 60Hz, while HDMI 2.1 supports 8K, dynamic HDR, and high refresh rates. In digital signage, HDMI cable quality and length become operationally relevant on long runs and 4K/8K installations — passive cables degrade beyond ~10m, requiring active extenders or HDBaseT solutions. Livesignage works across all HDMI-connected hardware, abstracting the cabling layer from the content workflow.

Use Cases

HDMI considerations in real signage deployments:

- External players: HDMI is the standard interface to consumer-grade and professional displays.
- Video walls: HDMI distribution amplifiers or dedicated processors handle multi-display feeds.
- Long-run installations: HDBaseT or fiber-over-HDMI for runs above 10m.
- Multi-source signage: HDMI inputs as content sources within composite playlists (e.g. live broadcast).
- 4K and 8K deployments: HDMI 2.1-rated cables and ports throughout the signal chain.