Postium 4K 55 inch LCD Monitor

Overview
The Postium OBM-U Series offers a versatile 4K/QFHD input capability and various 4K/12G display modes. With its fast mode, false colour modes, and waveform monitor and vector scope display, it is designed for UHD/4K production and broadcast QC monitoring. It also has an HDR display function, HDR waveform, adjustable gamma, camera log, and remote control via Ethernet.

Available in five models ranging from 9″ to 55″, all equipped with standard 12G/6G/3G-SDI input interfaces and HDMI 2.0 input, the OBM-U Series supports various colour spaces including DCI-P3 and ITU-R BT.2020. It also has built-in camera log to linear conversion LUTs and HDR emulation, allowing users to view both highlights and shadow details simultaneously. Other features include focus assist, false colour modes, gamut error type, and black stretch. The OBM-U Series is a comprehensive solution for UHD/4K production and broadcast QC monitoring.

Summary
Screen Size: 55 Inch
Resolution: 3840 x 2160
Inputs:
12G-SDI
3G-SDI
6G-SDI
BNC
HDMI
SFP
Outputs:
12G-SDI
3G-SDI
6G-SDI
BNC
SD-SDI
Power Supply: AC
Recording: No
Included in box
1x Postium OBM-U550L 4K 12G-SDI LCD Monitor
1x Power Cable

About the Postium 4K 55 inch LCD Monitor
The Postium OBM-U Series is designed for UHD/4K production and broadcast QC monitoring and encompasses five models from 9” to 55”. The OBM-U090 and U171 display UHD/4K signals scaled-down to native 1920×1080 resolution. The U-240 and U550L both utilise native 3840×2160 UHD resolution and the U311 is native 4096×2160 4K-DCI resolution.

All five models are equipped with standard 12G/6G/3G-SDI input interfaces (x2) and HDMI 2.0 input and support both 4K Quad Link 2-Sample Interleave and 4K Quad Link Square Division signals via SDI and SFP (no SFP input on OBM-U090). Analog Composite/Component I/O supported in OBM-U090 ONLY.

Closed Captioning decode and display for CEA-708(HD-SDI closed captioning standard) and CEA-608(SD-SDI closed captioning standard) is supported via SDI input. The OBM-U series accepts up to 3840×2160/24,25,30,50,60p and 4096×2160/24.25.30,50,60p signals.

Display Functions

Wide Colour Space Support including DCI-P3 and ITU-R BT.2020 is controlled with an advanced 3D LUT (Look Up Table) to reproduce various colour spaces accurately with smooth, artifact-free grayscale steps. Available colour gamuts are DCI-P3, ITU-R BT.2020, ITU-R BT.709, SMPTE-C, EBU, and Native.

3D Look-up Table import is supported for accurate and consistent colour matching between individual displays as well as using customised ‘looks’ that have been created by 3rd party colour-grading applications. 32ˆ³, 33ˆ³, 64ˆ³, 65ˆ³ cube file are supported.

In addition, the OBM-U series has Built-in Camera Log to Linear conversion LUTs from various camera manufacturers including Log-C, C-Log / S-Log2, S-Log3 / J-Log1 and more.

The LUT-converted content can then be output to downstream devices/monitors via the SDI loop out.

High Dynamic Range (HDR) Emulation applies a High Dynamic Range display gamma curve to HDR content. The OBM-U Series supports PQ EOTF (SMPTE ST 2084), Hybrid Log Gamma and S-Log3. Postium’s HDR function allows users to view both highlights and shadow details within scenes simultaneously, thus resulting in more natural and realistic reproduction.

SDR/HDR Display modes provide both full-frame HDR and SDR viewing as well as simultaneous side-by-side split screen comparison.

Colour Space / Dynamic Range / Gamma Comparison (Side by Side, Wipe position) allows users to compare different colour spaces, gammas, HDR / SDR, camera logs, and other colour settings side by side simultaneously. The comparison area can be selected and moved with a vertical wipe pattern.

Focus Assist controls the aperture level of a video signal and displays images on screen with sharpened edges to help camera focus operation.

False Colour 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 colour 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 colour space is selected as BT.709, the pixels outside of the targeted colour 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 colour space is selected as BT.709, the pixels outside of the targeted colour 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 colour space is selected as BT.709, the pixels inside of the targeted colour space are displayed as Mono, and the pixels outside of the targeted colour space are displayed as the colour. In this type, black and white area is not recognised.

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. Waveform Wide mode is also supported on the OBM-U170.

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).

Scan Mode allows full frame viewing of 4096 x 2160 (1.89:1) signals fed to the 1920×1080 (16:9) resolution screen. When Zero Scan mode is selected, the entire picture is displayed on the screen, maintaining a 1.89:1 ratio.

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 colour, brightness, horizontal/vertical position, and thickness of aspect markers can all be adjusted.

Input Signal Format Support

The OBM-U series is equipped with standard 12G-SDI input interface(x2), 3G/HD-SDI input interface(x2) and support 4K Quad Link 2-Sample Interleave signals and 4K Quad Link Square Division signals. Resolutions up to 3840×2160/24,25,30,50,60p and 4096×2160/24.25.30,50,60p signals are supported.

Single Link 4K/12G

Dual Link 2-Sample Interleave (2SI) up to 2160/60p.

Quad Link 2 Sample Interleave (2SI) uses four ¼ resolution full-frame sub-images and alternates the samples every two pixels and every line rather than splitting the image into four quadrants.

Quad Link Square Division. Each link contains one quarter square of the original image.

12G-SDI (ST 2022-6) over IP is supported in the OBM-U 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.

Input
4x BNC 12G/6G/3G/HD/SD-SDI-1/2, 3G/HD/SD-SDI-3/4
1x HDMI HDMI 2.0
1x SFP Optical
Output
4x BNC 12G/6G/3G/HD/SD-SDI-1/2, 3G/HD/SD-SDI-3/4 Active Loop Output
Input Signal Format
SMPTE ST 2082 2160p(60/59.94/50)
SMPTE ST 2081 2160p(30/29.97/25/24/23.98)
SMPTE ST 425-AB 1080p(60/59.94/50/30/29.97/25/24/23.98/30sF/29.97sF/25sF/24sF/23.98sF) / 1080i (60/59.94/50)
SMPTE ST 274 1080p(30/29.97/25/24/23.98/24sF/23.98sF) / 1080i (60/59.94/50)
SMPTE ST 296 720p(60/59.94/50)
SMPTE ST 260 1920 x 1035i(60/59.94)
SMPTE ST 2048 2048 x 1080p(24/23.98/24sF/23.98sF)
SMPTE ST 125 480i(59.94)
ITU R-BT 656 576i(50)
HDMI 2.0 ~ 2160p(60)
SFP 12Gbps, 6Gbps, 2.970Gbps, 1.485Gbps, 270Mbps
Audio In/Out
1x Phone Jack In Line In(Stereo)
1x Phone Jack Out H/P Out(Front, Stereo)
2x Speaker Out Stereo
Display
Size 55 inch
Resolution 3840 x 2160 (16:9)
Pixel Pitch 0.315mm
Colour 1.073B Colors (8bit+2bit FRC)
Viewing Angle 178(H), 178(V)
Luminance of White 450cd/m²
Contrast 4000:1
Display Area 1209.6 x 680.4 (mm)
General
2x Ethernet Control/Update, RJ-45P Input / Output
1x GPIO GPI-7 Port, RJ-45P Jack
2x Serial RS-422 Jack, RJ-45P Input / Output
1x USB For Firmware Update, Colour Calibration
Power Requirements AC(100V~230V,50/60Hz)
Power Consumption 220W
Operating Temperature 0°C ~ 40°C (32°F ~ 104°F)
Operating Humidity 20% ~ 80% RH
Weight 37kg / 81.57lbs
Dimensions with stand (W x H x D) 1258 x 815 x 270mm / 49.52 x 32.08 x 10.62inch
Accessories Power Cable
Option Wall Mount Kit / Carrying Case

Versatile 4K/QFHD Input Capability
Various 4K/12G Display Modes
Fast Mode
False Colour Modes
Waveform Monitor and Vector Scope Display
HDR Display Function
HDR Waveform
Adjustable Gamma
Camera Log
Remote Control via Ethernet