RetroTINK 4K Video Timings Calculator

A simplified RT4K derivative of Tom Verbeure's original calculator.

Input Parameters

Predefined Mode
Horizontal Pixels		Ok
Vertical Pixels		Ok
Refresh Rate (Hz)		Ok
Bits per Component
Color Format
Video Optimized

Timings

	CVT	CVT-RB	CVT-RBv2	CEA-861	DMT	Custom
Aspect Ratio
Pixel Clock							MHz
H Total							Pixels
H Active							Pixels
H Blank							Pixels
H Front Porch							Pixels
H Sync							Pixels
H Back Porch							Pixels
H Sync Polarity
H Freq							kHz
H Period							us
V Total							Lines
V Active							Lines
V Blank							Lines
V Blank Duration							us
V Front Porch							Lines
V Sync							Lines
V Back Porch							Lines
V Sync Polarity
V Freq							Hz
V Period							ms
Peak BW (10/8)							Gbps
DMT ID
DMT timing standard
Std 2-byte code
CVT 3-byte code
VIC
HDMI 2.0 (bandwidth)
RT4K (600 MHz)							Max 18 Gbps
RT4K Custom Modelines
CVT
CVT-RB
CVT-RBv2
CEA-861
DMT
Custom
RT4K Input Modes (square pixels, progressive scan)
CVT
CVT-RB
CVT-RBv2
CEA-861
DMT
Custom

WARNING: 600 MHz is the RT4K's HDMI output pixel clock limit, but there are other limits that may prevent you from reaching that high. Internal memory bandwidth limits are one example: 1080p inputs with output refresh rates above 120 Hz are known to be problematic.

WARNING: If you use the input modes, it's only a starting point, you will need to tweak it. It always assumes square pixels (PAR of 1.0) and progressive scan, it always specifies mode slot 1. You may also need to tweak the first 7 parameters to tighten the detection window. You should consult the custom input mode documentation before using these.

When looking up a DMT or CEA-861 resolution for a particular refresh rate, the tool rounds the specified refresh rate to the closest integer and then matches against rounded DMT and CEA refresh rates. For example, if you specify a refresh rate of 60.1Hz, the tool will show DMT and CEA refresh rates of 59.94Hz.

There are some CEA VIC numbers with multiple timings that differ slightly in their Vtotal, and thus in their refresh rates. For example, VIC timings 23 and 24 have a resolution of 1440x288 can have a refresh rate of 50.080Hz, 49.920Hz, and 49.761Hz. When you search for one of those exostic timings, the tool will choose one of the options, but not the other. The exact behavior is undefined.