OBM-8K/4K Series Overview
The OBM-8K/4k Series incorporates 4 x 12G SDI inputs and active loop outs (x4), 1-HDMI 2.0 input and 2-SFP cages. The OBM-8K/4K Series accepts up to 7680×4320/60/59.94/5op signals. HDR support includes EOTFs for PQ (SMPTE ST 2084), Hybrid Log Gamma and S-Log3 and wide color gamuts conforming to DCI-P3 and ITU-R BT.2020.
The OBM-8K/4k Series offers professional performance and features, including excellent quality black level reproduction and accurate calibrated colorimetry, making the OBM-8K/4k series monitors ideal for 8K/4K live production, versatile studio monitoring applications, and field production applications. In addition, the OBM-8K/4k Series supports integrated 3D LUTs, Waveform, Vector
Display Functions
Wide Color Space Support including DCI-P3 and ITU-R BT.2020 is controlled with an advanced 3D LUT (Look Up Table) to reproduce various color spaces accurately with smooth, artifact-free grayscale steps. Available color gamuts are DCI-P3, ITU-R BT.2020, ITU-R BT.709, SMPTE-C, EBU, and Native.
Versatile 4K/QFHD Input Capability
The OBM-U** 8K/4K series is equipped with standard 12G-SDI input interface(x4) and support 4K/8K Quad Link 2-sample inter-leave signals and 4K Quad Link Square Division signals.
The OBM-U** 8K/4K Series can accept up to 7680×4320/23.98,24,25,29.97,30,50,59.94,60p and 8192×4320/23.98, 24, 25, 29.97, 30, 50, 59.94, 60p.
Custom 3D LUT File Import
The OBM-U**8K/4K Series allow the user to import 3D Look-up Table for accurate and consistent color match- ing between indivisual displays as well as using customized ‘looks’ that have been created by 3rd party color-grading applications. 32^3, 33^3, 64^3 and 65^3 cube file is supported.
Camera Log Selection
The OBM-U**8K series have the built-in camera LUT of the various camera manufacturers. It allows users to load the following camera logs. Log-C, C-Log / S-Log2, S-Log3 / J-Log1
The more camera LUTs will be updated.
The LUT-converted content can then be output to downstream devices/monitors via the SDI loop out.
High Dynamic Range(HDR) Display Function
The OBM U**8K/4K series provides the function to display the High Dynamic Range footage.
Postium HDR function allows users to view both highlights and shadow detail of scenes at the same time, thus resulting in more natural and realistic images.
The OBM U**8K/4K series supports PQ EOTF (SMPTE ST 2084), Hybrid Log Gamma and S-Log3.
OBM-HDR provides the function of comparing HDR and SDR(Standard Dynamic Range) on the displayed image on the OBM series simultaneously.
Focus Assist controls the aperture level of a video signal and displays images on screen with sharpened edges to help camera focus operation.
False Color indicates the Luma (Y) level of the input image. If a certain Y level is set, the pixels with the designated Luma (Y) level are displayed with a zebra pattern or a color pattern. There are display modes – Zebra, Variable, ARRI, and Comparison.
Gamut Error Type can be observed in 3 modes. In Type 1, when the targeted color space is selected as BT.709, the pixels outside of the targeted color space are displayed as Black Zebra.
The pixels over Y Maximum, Chroma Maximum, RGB Maximum are displayed as Black Zebra, and the pixels below Y Minimum, Chroma Minimum, RGB Minimum are also displayed as Black Zebra.
In Type 2, when the targeted color space is selected as BT.709, the pixels outside of the targeted color space are displayed as Black or White Zebra.
The pixels over Y Maximum, Chroma Maximum, RGB Maximum are displayed as Black Zebra, and the pixels below Y Minimum, Chroma Minimum, RGB Minimum are displayed as White Zebra.
In Type 3: Mono, when the targeted color space is selected as BT.709, the pixels inside of the targeted color space are displayed as Mono, and the pixels outside of the targeted color space are displayed as the color. In this type, black and white area is not recognized.
Black Stretch increases visibility in dark areas without degradation of image quality in bright areas. This mode can be used to increase shadow detail without changing absolute black level and without affecting mid-tones.
4K HDR Waveform Monitor and Vector Scope Display modes enable users to monitor sources using the internal Waveform and Vector Scope individually or simultaneously.
The position of Waveform and Vector Scope can be moved between Top Left, Top Right, Bottom Right, and Bottom Left.
Adjustable Gamma control allows for incremental compensation between gamma correction values of 1.0 and 3.0 — thereby ensuring that the decoded image isn’t too bright (no gamma correction) or too dark (over correction).
4K/QFHD Mode
The LCD panel resolution of OBM-U318K/278K/248K is QFHD(16:9) 3840×2160, so if the input signal is 3840×2160 1:1 mapping is supported. If the input signal is DCI 4K(4096×2160), 1:1 mapping is not supported.
[Zero Scan]
When the 4096×2160 signal is fed, if you select Zero Scan using [Scan] button on the front panel, the picture is scaled to be displayed on the panel of 3840×2025 resolution with maintaining 1.89:1 ratio.
[1:1 Scan]
When 1:1 Scan mode is selected with the [Scan] button in 1920×1080, 1280×720 mode, etc., it is placed in the center of the screen as above. A 1:1 mapped image is output.
Various Frame Markers/Mattes are available on the OBM-U series, including aspect, area, and center markers. In addition, the detailed display settings of each marker are allowed. For example, the color, brightness, horizontal/vertical position, and thickness of aspect markers can all be adjusted.
Input Signal Format Support
Single Link 12G/6G/3G/HD-SDI, Dual-Link 6G/3G-SDI, Quad Link 12G/6G/3G/-SDI signals can be
Input to the SDI In connectors of this monitor.
Up to 4-channel Single Link 12G/6G/3G/HD-SDI signals, 1-channel Dual-Link 6G/3G-SDI or 1-channel Quad-Link 12G/6G/3G-SDI signals can be input. Use the appropriate input connectors depending on the input signal, referring to the table below.
Various 4k/12G Display Modes
Single Link 12G-SDI
Dual Link 2-Sample Interleave(2-SI)
Quad Link 2 Sample Interleave (2SI)
Each link contains a full image at 1/4 resolution. 2SI mode uses four Sub-image and alternates the samples every two pixels and every line instead of slitting the image into four quadrants.
Supports 12G-SDI Single Link Square Division signal format
The OBM-U**8K series can display 12G-SDI Single Link 4K/UHD signals as well as 3G-SDI Quad Link signals. This is already a very useful feature, compared to competitors’ monitors.
Most of the single link 12G-SDI signals are displayed as 2-S.I. format on the screen. But, the single link 12G-SDI signals with Square Division format are increasing. In order to meet this requirement in the location and studio, the OBM-U**8K series support both 12G-SDI Single Link 2-S.I. mode and 12G-SDI Single Link Square Division mode.
Meets the Return Loss Standard, SMPTE ST 2082-1:2015 
In the professional broadcasting video industry, Return Loss is an important parameter that measures the reflected signal that bounces back from a terminated device. If the broadcast monitor has the poor return loss, the level of reflected signal negatively impacts the signal integrity of the loop-out signal.
The OBM-U**8K monitors meets the requirements of Return Loss specified in SMPTE ST 2081-1:2015, so that the OBM-U**8K monitors provides the high signal fidelity.
12G-SDI (ST 2022-6) over IP is supported in the OBM-U**8K series via an SFP interface, which allows the use of various SFP modules. The OBM-U series monitors can display the 12G-SDI over fiber and the 12G-SDI Single Link over IP through the integrated SFP interface.
