Overview

Rugged, compact, and designed for professional workflows, the UDC-4K is our most versatile Mini-Converter. The UDC-4K is a broadcast-quality Up/Down/Cross Mini-Converter that can seamlessly convert between 4K/UHD and 2K/HD video formats. Not only does it perform raster and frame rate conversions, but it can also function as a frame synchronizer and as a 1x4 12G-SDI DA, supporting video formats up to 4Kp60. With both 12G-SDI and HDMI 2.0 inputs and outputs, the UDC-4K makes SDI and HDMI signal conversion simple and efficient.

Designed on AJA’s industry-leading conversion technology, the UDC-4K offers the highest-quality required in professional broadcasting, live events, and other critical AV environments. UDC-4K’s wide range of conversion possibilities makes it ideal for aligning disparate sources to a common format and timing reference, integrating legacy signals into higher resolution workflows, and handling many production challenges that may arise. It even offers utility frame rate conversion to convert 59.94 to 50/60 or 50/60 to 59.94 frame rates.

The UDC-4K features 12G-SDI and HDMI 2.0 inputs, four 12G-SDI outputs, and one HDMI 2.0 output. The multiple SDI outputs function as a distribution amplifier, or DA, enabling the transmission of a clean or processed signal to multiple destinations. It offers SDI and HDMI loop outputs for simple confidence monitoring or pass-through to the next device. A reference input enables the UDC-4K to lock to an external reference, or it can lock to the SDI or HDMI input, providing frame synchronization capabilities for untimed video signals.

It also offers the ability to convert 12G-SDI to HDMI 2.0 and vice versa with pristine image fidelity and support up to 60p for 4K/UHD. The UDC-4K is also “HDR-aware” supporting HDR workflows with proper SDI VPID and HDMI Infoframe metadata signaling management.

The UDC-4K can easily be configured with its built-in button control panel and LCD display as a stand-alone device, or via AJA’s free Mini-Config software for Windows and macOS.

These features make it the preferred solution for “all-in-one” Mini-Converter needs. The UDC-4K should be included in every professional AV, film/TV production, live production, broadcast, and DIT tool kit!

Features

• Up, down, cross-conversion of 4K/UHD/2K/HD signals
• Frame sync, aligns output signals to a reference
• Utility frame rate conversion
• Converts 12G-SDI to/from HDMI 2.0, up to 4Kp60
• Supports 12-bit workflows
• Scaling technology utilizes AJA’s high-quality multi-tap polyphase scaling algorithm
• Motion adaptive deinterlacer
• HDR signaling metadata pass-through and optional override
• EDID Emulation up to UHDp60
• Loss of input management
• HDMI embedded audio support 8-channel 24-bit
• SDI embedded audio support 16-channel 24-bit
• Embedded audio pass-through of AC-3 (Dolby Digital) and E-AC-3 (Dolby Digital Plus) compressed audio, including DD+ Atmos (aka DD+ JOC)
• Supports up to 100 frames of audio delay
• 12G-SDI and HDMI 2.0 loop outputs
• 4x 12G-SDI outputs can be used as a 1-to-4 distribution amplifier
• Genlock: External Reference Input, SDI Input, HDMI Input, or Free Run
• Configuration via built-in button control panel and LCD display, or free AJA Mini-Config software for Windows and macOS
• Universal power supply included
• Five year warranty and technical support

Specifications

Video Formats

• (4K) 4096x2160p
• (UHD) 3840x2160p
• (2K) 2048x1080p
• (HD) 1920x1080p
• (HD) 1920x1080i
• (HD) 1280x720p

Note: Raster and Frame Rate Dependent, please see UDC-4K Video Formats in the Download / Documents section of the website product page.

Video Input and Output SDI

• 1x 12G-SDI Input BNC, SMPTE ST 292/424/2081/2082
• 4x 12G-SDI Output BNCs, SMPTE ST 292/424/2081/2082
  • HDR VPID decoder and generation with pass-through or override for Colorimetry and Transfer Characteristic, SMPTE ST 352
  • YCbCr 4:2:2/4:4:4
  • RGB 4:4:4, SMPTE or Full level
  • 10 or 12-bit*
• 1x 12G-SDI
  • (4K) 4096x2160p 23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60
  • (UHD) 3840x2160p 23.98, 24, 25, 29.97, 30, 50, 59.94, 60
• 1x 6G-SDI
  • (4K) 4096x2160p 29.97, 30
  • (UHD) 3840x2160p 29.97, 30
• 1x 3G-SDI (Level A or B Dual Link)
  • (2K) 2048x1080p 23.98, 24, 25, 47.95, 48, 50, 59.94, 60
  • (2K) 2048x1080PsF 23.98, 24, 25, 29.97, 30
  • (HD) 1920x1080p 23.98, 24, 25, 29.97, 30, 50, 59.94, 60
  • (HD) 1920x1080PsF 23.98, 24, 25, 29.97, 30
  • (HD) 1920x1080i 50, 59.94, 60
  • (HD) 1280x720p** 50, 59.94, 60
• 1x 1.5G-SDI
  • (2K) 2048x1080p 23.98, 24, 25, 29.97, 30
  • (2K) 2048x1080PsF 23.98, 24, 25, 29.94, 30
  • (HD) 1920x1080p 23.98, 24, 25, 29.97, 30
  • (HD) 1920x1080PsF 23.98, 24, 25, 29.97, 30
  • (HD) 1920x1080i 50, 59.94, 60
  • (HD) 1280x720p 50, 59.94, 60

*Some 12-bit formats not supported, please see UDC-4K Video Formats in the Download / Documents section of the website product page.
**1280x720p is Level A Only

Video Input and Output HDMI

• 1x HDMI Input Type A connector, HDMI v2.0b
• 1x HDMI Output Type A connector*, HDMI v2.0b
• HDR Infoframe decoder and generation with pass-through or override for Colorimetry and Transfer Characteristic as defined in CTA-861.3 and HDMI v2.0b
• YCbCr 4:2:2/4:4:4/4:2:0
• RGB 4:4:4, SMPTE or Full level
• 24, 30, or 36 Bits Per Pixel (HFR 4K/UHD 4:4:4 limited to 24 BPP)
• (4K) 4096x2160p 23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60
• (UHD) 3840x2160p 23.98, 24, 25, 29.97, 30, 50, 59.94, 60
• (2K) 2048x1080p 23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60
• (HD) 1920x1080p 23.98, 24, 25, 29.97, 30, 50, 59.94, 60
• (HD) 1920x1080i 50, 59.94, 60
• (HD) 1280x720p 50, 59.94, 60

*If a connected monitor doesn’t support HDMI protocol, the unit automatically switches to DVI protocol (which does not pass audio).

Note: Raster and Frame Rate Dependent, please see UDC-4K Video Formats in the Download / Documents section of the website product page.

HDCP

• Does not encode the HDMI output with HDCP encryption
• Does not accept HDCP input
• SDI outputs are unencrypted

Reference Input

• External, 1x BNC
• 75-ohm terminating
• Blackburst or tri-level sync

Genlock

• Ext Ref
• SDI In
• HDMI In
• Free Run based on Temperature Compensated Crystal Oscillator

Audio Pass-Through Formats

• PCM
• Dolby Digital (AC-3)
• Dolby Digital Plus (E-AC-3), including Atmos Immersive Sound (JOC)

Audio Input Digital

• SDI embedded audio, 24-bit, 16-channel
• HDMI embedded audio, 24-bit, 8-channel

Audio Output Digital

• SDI embedded audio, 24-bit, 16-channel
• HDMI embedded audio, 24-bit, 8-channel

User Interface

• Color LCD Display
• 4x dedicated, backlit navigation and selection buttons
• USB-C port used with supplied cable and Mini-Config software application to configure and view device status via Mac or Windows

Video Processing

• Frame synchronization
• Up, down, cross-conversion
• Format conversion
• Frame rate conversion
• Polyphase scaling algorithm
• Motion adaptive deinterlacer
• Hardware 12-bit
• Nominal video delay 2 frames, (Interlaced and PsF formats increase delay)
  • Frame sync can be 1 frame when locked to input

Audio Processing

• High quality Sample Rate Conversion supported on all audio inputs
• SRC bypass for non-PCM audio (e.g., Dolby E, AC-3, etc.)
• Delay audio 0 to 100 video frames in 1/16 of a frame increments

Ancillary Data

• Supports pass-through of PCM embedded audio
• Supports pass-through of non-PCM audio when source is in time with the selected ref (SDI In, HDMI In, or Ext Ref).  Non-PCM audio is not supported during frame sync operation.

Size (w x d x h)

• 5.0" x 8.09" x 1.65" (127.0 x 205.5 x 41.8 mm)

Weight

• 2.0 lb (0.9 kg)

Power

• External power supply required
  • Enclosure: 10-18VDC regulated, 4-pin mini-XLR, 25W max
  • AC Adapter, included: 100-240VAC, 50/60 Hz, universal input, 60W
  • Optional spare AC adapter sold separately, AJA-PWR-12-60W

Environment

• Safe Operating Temperature: 0 to 40 C (32 to 104 F)
• Safe Storage Temperature (Power OFF): -40 to 60 C (-40 to 140 F)
• Operating Relative Humidity: 10-90% noncondensing
• Operating Altitude: <3,000 meters (<10,000 feet)