Tetratune
The Videworks Tetratune HDMI video processor, LUT Box, & TPG enables accurate Closed Loop display calibration with ColourSpace via 3D LUTs, as well as providing full Patch Generation operation via full ColourSpace Integration.
- ColourSpace INF/XPT/PRO/CAL/LTE HTX/HTP/HTL
- Manufacturer Specific ColourSpace Tetratune HTP/HTL
- Capacity for one hundred 33^3 LUTs
- Split screen operation LUT on/off
- Tetrahedral interpolation for highest performance
- HDCP 1.4, 2.2 & 2.3 support
- Multiple bit depths
- Small size
- TPG Operation
Overview
Tetratune is a HDMI video processor, LUT box, and Test Patch Generator. It is ideal for use with any HDMI Home Cinema image workflows, making it a perfect for Home Cinema applications where precise colour management is required.
With HDMI input/output, the Tetratune can also be used within professional colour grading and on-set monitoring applications, when HDMI monitors are in use.
Tetratune has been designed by Videworks specifically to work with Light Illusion's ColourSpace software. It offers outstanding colour tuning performance through its multiple 33^3 LUTs with tetrahedral interpolation. With HDMI 2.0b input and output this device supports video formats up to 4K60, including HDR and YCbCr as well as RGB colour formats. Encrypted content is also handled seamlessly with HDCP support, allowing tuning of DRM protected video from Blu-ray players, streaming devices, etc.
The Look, London, beta tests the Tetratune LUT Box
We have been looking for a simple and elegant solution for very accurate calibration of HDMI monitors for years. Whether this is for TVs or Projectors, the ability to load a calibration LUT from Light Illusion's ColourSpace software into a HDMI to HDMI box, and do it cost effectively for each monitor has been a great addition to the facility. The option to bypass or split screen LUTs, and to go quickly between LUTs from the WebUI means integration has been very smooth.
Specifications
- 100 individually selectable 3D LUTs
- Split screen operation LUT on/off
- Tetrahedral interpolation of LUTs for highest performance
- Built-in colour calibration test pattern generator
- Fully integrated with ColourSpace calibration software
- HDCP 1.4, 2.2 & 2.3 support
- 8-bit & 10-bit colour depth (12-bit pass through)
- RGB and YCbCr colour formats supported, including 4:4:4, 4:2:2 & 4:2:0 subsampling
- WebUI integrated control
- Dedicated PSU with additional PoE capability
- Compact form factor
For LUT generation and upload, as well as TPG operation, a compatible ColourSpace license is required.
Once LUTs have been uploaded, Tetratune operation can be managed via ColourSpace, as well as a browser based control panel, with auto LUT switching via input signal standards.
ColourSpace Integration
Teratune operation and function is controlled via the Hardware Options menu, accessed via the Profiling window.
Initial Setup
- If required, make sure the correct drivers are installed
(If necessary, verify via Windows Device Manager) - Connect input/output signal cables to the Tetratune, connecting the signal out to the display to be profiled and calibrated
(Make sure a valid input signal is being input into Tetratune) - Connect the Tetratune to the ColourSpace PC via a network cable, and start ColourSpace
- Set the desired set-up options via the ColourSpace Settings menu, as required
- Open a ColourSpace Profiling window, select Hardware Options, and select Tetratune from the Hardware drop-down list
- Using the Network Address window enter the required IP address, and select Connect
(The IP address can be seen on-screen by removing the input HDMI signal, or located via your router) - To perform a new profile for LUT generation select either the Bypass LUT Slot or an Empty slot, and set the required TPG Settings
(Set the required TPG values including General, Colour, and HDR as required) - Using Calibration Patches select the desired patch option to use for profiling
(If possible, Auto uses the patch settings defined within the ColourSpace Settings window, or else the closest available patch settings)
Note: The keyboard 'O' key can be used within the Manual Measure and Hardware menus to quickly Disable/Enable the TPG
As soon as a Calibration Patches selection is made the output of Tetratune will display the patch colour as defined within the ColourSpace Measure and Characterisation menus, also potentially using the TPG Settings with the Tetratune Options menu.
Profiling Operation
To use Tetratune as a Patch Generator with ColourSpace navigate to the desired profiling mode - Manual Measure or Display Characterisation.
Output of Tetratune will mimic the colour displayed, using the patch settings defined via the Hardware Options and Settings menus.
Note: the TPG Settings within Tetratune Options can be used to override the default input video signal values.
Profiling can then be performed as normal, using the probe connected to ColourSpace, and with Tetratune displaying the required patches on the display being profiled.
LUT Upload
After profiling, a Calibration LUT can be generated as normal within ColourSpace LUT Tools.
With the LUT still held within ColourSpace navigate back to the Hardware Options menu, and select the desired LUT from within the Select LUT options, and Upload to the desired LUT slot using a unique combination of Input, Screen, and Mode names. The uploaded LUT name will set the LUT Slot name.
Note: The LUT Slot used for LUT Upload is defined not just by the selection of the LUT Slot, but also by having a combination of Input, Screen, and Mode text values that are unique.
An active LUT Slot can be reset back to Empty by performing a Unity Bypass Upload.
Demo Mode can be used to split-screen between the LUT and bypass mode, to see the effect of the LUT.
