HDMI ports and HDMI 2.1 features
The number of HDMI inputs.
- Standard
- ISO/IEC 21118 Table 1
- ISO 21118
- ISO 21118 required
4K at 60 Hz, 10-bit 4:4:4 needs a 594.0 MHz pixel clock and 17.82 Gbps of video data, which is 22.28 Gbps on a TMDS link or about 20.05 Gbps on an FRL link. HDMI 2.0 (TMDS) (18 Gbps) cannot carry it; HDMI 2.1 FRL 40G (40 Gbps) carries it; HDMI 2.1 FRL 48G (48 Gbps) carries it.
Required rate counts blanking, using CTA-861 total raster sizes. For FRL this is a conservative estimate: real FRL packs blanking more efficiently, so results close to a limit can go either way. DSC compression is not modelled. Fractional rates (59.94 Hz) need 0.1% less.
- Pixel clock
- 594.0 MHz4400 × 2250 total raster
- Video data
- 17.82 Gbps30 bits/pixel
- TMDS line rate
- 22.28 Gbps743 MHz TMDS clock
- FRL line rate (est.)
- 20.05 Gbpsvideo × 18/16
Show the numbers
| Total raster | 4400 × 2250 px |
|---|---|
| Pixel clock | 594.00 MHz |
| Bits per pixel on the wire | 30 |
| Video data rate | 17.82 Gbps |
| TMDS line rate (×10/8 via clock) | 22.28 Gbps |
| FRL line rate estimate (×18/16) | 20.05 Gbps |
| HDMI 2.0 (TMDS) | 18 Gbps raw · 14.40 Gbps payload |
| HDMI 2.1 FRL 40G | 40 Gbps raw · 35.56 Gbps payload |
| HDMI 2.1 FRL 48G | 48 Gbps raw · 42.67 Gbps payload |
How to compare it
HDMI port count
Count *full-feature* ports. Often only one carries 4K HDR or eARC.
Max input signal
The highest resolution and refresh accepted, e.g. 4K120, 4K60, 1080p240.
Only means anything next to native resolution. 4K input on a 1080p device is a downscale.
Standard: ISO/IEC 21118 items 17.1/17.2
Marketing traps
- Max input signal: 'Supports 4K' is the most common resolution lie on budget listings.
Across the catalogue
HDMI port count
21 of 24 projectors list it- Epson EpiqVision Ultra LS8003
- Hisense L9H TriChroma Laser TV3
- Hisense PX3-PRO3
- Optoma UHZ503
- Valerion VisionMaster Pro 23
Terms on this page
Supported (input) resolution
The highest signal the projector will accept. ⚠ This is the standard Amazon trap: "Supports 4K" on a 720p-native LCD. Never use input resolution as the headline resolution. ⚖ inputs.max_input_resolution
HDMI version & ports
Count, version (1.4/2.0/2.1), max bandwidth (HDMI 2.0: 18 Gbps; 2.1: up to 48 Gbps, with some chips limited to lower FRL rates such as 40; HDMI 2.2, released June 2025: 96 Gbps), HDCP version (Netflix requires HDCP 2.2 or later for 4K). ⚖ inputs.hdmi_count, inputs.hdmi_version_max, inputs.hdmi_bandwidth_gbps, inputs.hdcp_version