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HDMI Bandwidth Calculator
Estimate uncompressed video payload and the HDMI cable certification class that is typically discussed for that mode.
Result
Premium High Speed HDMI
Active video × 1.10 blanking estimate
Uncompressed active video is about 11.94 Gbps (24 bits/pixel). That is not the HDMI link rate. Encoding, blanking, audio, and DSC can change the real requirement.
How this was calculated
- Active video Gbps = H × V × refresh × bits_per_pixel / 1e9, with bits_per_pixel from chroma × bit depth.
- Payload estimate applies a documented 1.10 blanking factor. This is not the HDMI link rate.
- Compared with TMDS 8.16 / 14.4 Gbps payloads and FRL 48G ~42.67 Gbps payload after line encoding.
- User-facing cable labels are High Speed, Premium High Speed, and Ultra High Speed HDMI — not a version-named cable nickname.
Limitations
- DSC, VRR, audio, and vendor timings can change the real requirement.
- HDR metadata is small; 10-bit signaling is the usual bandwidth-relevant companion.
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