Vsif Hdmi

Reference monitors receive HDR static metadata via VSIF HDMI, allowing accurate mastering (e.g., 10,000 nits peak, BT.2020 color space). Without VSIF, only limited HDMI 2.0 HDR static metadata (HDR10) would be possible.

Often confused with VSIF, the CEA-861 VSDB is an EDID extension block. In contrast, is an InfoFrame transmitted during live HDMI operation (not just during handshake). vsif hdmi

| Feature | VSIF HDMI (DisplayID) | CEA-861 Vendor Specific DB | EDID 1.4 | |---------|------------------------|----------------------------|----------| | Transport | Live InfoFrame (TMDS) | EDID block (DDC) | DDC only | | Max size | 31 bytes per packet | 31 bytes total | 256 bytes | | Dynamic updates | Yes (per frame) | No (static) | No | | VRR range support | Yes (precise) | Limited (fixed few values) | No | | Tiled displays | Yes | No | No | | HDR dynamic metadata | Yes (Dolby Vision/HDR10+) | No | No | Reference monitors receive HDR static metadata via VSIF

Here is a "good piece" of code (a C-style struct and helper function) to construct an HDR VSIF packet. This is compliant with CTA-861-G standards. In contrast, is an InfoFrame transmitted during live