AJA 4K2HD 4K/UHD to 3G/HD/SD-SDI and HDMI Downconverter

AJA 4K2HD 4K/UHD to 3G/HD/SD-SDI and HDMI Downconverter

AJA 4K2HD 4K/UHD to 3G/HD/SD-SDI and HDMI Downconverter

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Product Highlights

  • 4K and UltraHD Input Signals Supported
  • Simultaneous SDI and HDMI Output
  • Supports 4K/UHD at 50/60 fps
  • 3G, HD, and SD Input Support
  • Control via MiniConfig Software over USB
  • Universal 5 VDC Power Supply Included
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B&H $500 Gift Card Dash

Share for a chance to win a $500 B&H Gift Card!

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Share a favorite product for chances to win one of eight $500 B&H Gift Cards!
1 new winner announced every Monday starting Nov 5th!
Limit 1 entry per day: Come back every day to increase your chance of winning.

Be sure to mention #BHWishList when you share!

Congrats to our winners so far:

Next winner: Nov 19th

James Z. (Wk 1)

Ralph H. (Wk 2)

Official Rules


NO PURCHASE IS NECESSARY TO ENTER OR WIN. The B&H $500.00 Gift Card Dash (the "Sweepstakes") is void where prohibited by law and is sponsored by B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 ("Sponsor"). It is not sponsored or endorsed by Facebook or Twitter in any way.

Entry Period/Methods of Entry. The Sweepstakes will run from on or about October 28, 2018 until on or about December 23, 2018 (the "Entry Period"). Entries received outside the Entry Period are void. Enter the Sweepstakes via either one of the following methods. (1) Share any product found on the B&H website (the "Website") on Facebook or Twitter via the dedicated links contained on the website using the hashtag #BHWishlist; or (2) Mail a postcard (postmarked during the Entry Period) containing your name, address, phone number, and email address, and indicate the subject(s), if any, about which you are interested in receiving future emails from B&H (e.g. photo, video, audio, computers, home theater, portable entertainment ) (optional) to: B&H $500.00 Gift Card Dash Sweepstakes, c/o B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 (either option, an "Entry"). Entries must not, in the sole and absolute discretion of the Sponsor, contain obscene, provocative, defamatory, sexually explicit, or otherwise objectionable or inappropriate content. Entries deemed by Sponsor to be inappropriate will be disqualified. Entries owned by a third party, or the use of any trademarks, service marks, logos, brands, or products owned by a third party are not acceptable for entry into the Sweepstakes. Limit 1 entry per person, per day.

Winner Selection/Prizes/Odds. The B&H Social Team will randomly select a winner from among all eligible entries every Monday during the Entry Period, for a total eight (8) winners (each a "Winner"). Each Winner will receive a B&H Gift Card pre-valued in the amount of $500.00. No cash or other substitutions will be offered. Winner selection is in the sole and absolute discretion of the B&H Social Team. Any taxes are the sole responsibility of the winner. Winners will be notified and receive their prize at the email address associated with the account to which their Entry was posted or the email account provided with a mail-in entry. The odds of winning depend on the number of eligible entries received.

Identity of Winners/Eligible Participants. Winners will be identified by the email account associated with the Facebook or Twitter account from which their Entry was submitted or the email account provided with a mail-in entry. An email account holder shall mean the natural person assigned to such email account by the internet access or online service provider or other organization responsible for assigning email addresses for the domain associated with such email account. Any issues regarding the identity of a Winner shall be resolved by Sponsor in its sole discretion. The Sweepstakes is only open to residents of the United States that are at least eighteen (18) years of age on their entry date and is not open to employees of Sponsor, their immediate family, any person domiciled with such employees, or any affiliates or subsidiaries of Sponsor.

Entry Ownership/Entrant Agreements. Entrants retain full ownership and copyrights to their Submission. However, by entering the Sweepstakes entrants grant Sponsor permission to use their Entries for promotional purposes on their respective social media channels with proper credit. Entrants also agree: (a) to be bound by these Official B&H $500.00 Gift Card Dash Sweepstakes Rules; (b) that any claims related to this Sweepstakes shall be resolved individually without resort to any form of class action and that awards, shall be limited to actual out-of-pocket costs incurred in entering the Sweepstakes, and shall not include incidental or consequential damages or attorneys fees; and (c) that any actual or perceived ambiguities in these rules shall be interpreted by Sponsor in their sole discretion.

Limitation of Liability/Sponsor Modification/Cancellation Rights/ Choice of Law/ Venue/ Winners List. Sponsor is not responsible for incomplete entries or for failure to receive entries due to technical failures or human error of any kind. Winners agree that Sponsor will have no responsibility for losses or damage of any kind resulting from the acceptance, possession, or use of the prizes. Except where prohibited, participation in the Sweepstakes constitutes entrant's consent to the publication of his or her name by Sponsor in any media for commercial or promotional purposes without limitation or further compensation subject to Sponsor's respective Privacy Policies. Sponsor may modify or discontinue the Sweepstakes at any time and may disqualify from the Sweepstakes any person it determines, in its sole discretion, to have attempted to or actually tampered with or otherwise abused any aspect of the Sweepstakes. Entrants agree that in the unlikely event a dispute arises in connection with this Sweepstakes, it will be governed by the laws of the State of New York and heard exclusively in a court of applicable jurisdiction in the County and State of New York irrespective of any choice of law provisions to the contrary. To receive names of the winners by U.S. mail, please mail a self-addressed stamped envelope to: B&H Foto & Electronics Corp., Attn: B&H $500.00 Gift Card Dash Sweepstakes, 440 Ninth Avenue, New York, NY 10001. Any Winners List request must be received by B&H within one (1) year of the date the Sweepstakes is conducted.

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AJA 4K2HD overview

  • 1Description

The 4K2HD 4K/UHD to 3G/HD/SD-SDI and HDMI Downconverter from AJA allows you to convert professional SDI 4K and Ultra HD signals to HD or SD resolutions. It outputs simultaneously to one 3G/HD/SD-SDI output and one HDMI output, allowing you to send the downcoverted signals to SDI and HDMI devices for on set monitoring or live broadcasting.

The 4K2HD features four SDI connections for four 1.5GHz, two dual-stream 3GHz, and four 3GHz 4K (4096x2160) and UHD (3840x2160) input signals. It supports multiple frame rates up to 50 and 60 fps at full 4K resolution. The output signal will have a matching frame rate for accurate viewing of your footage. The 4K2HD also supports HD and NTSC/PAL SD input signals, allowing the device to function as a 3G/HD/SD-SDI to HDMI converter.

Configure the 4K2HD using AJA's free MiniConfig software for Mac or PC over the USB 2.0 connection. The software provides an easy-to-use graphical interface with detailed information about input and output formats as well as all configuration parameters. Additionally, external DIP switches on the device let you configure the V2Digital without computer access. A universal 5 VDC universal power supply comes included.

Additional Features
  • Aspect ratio conversion from full 4K to HD
  • One-to-one pixel center crop of original 4K frame supported for focus checks
  • 24-bit, 8-channel audio embedded in SDI and HDMI outputs
In the Box
AJA 4K2HD 4K/UHD to 3G/HD/SD-SDI and HDMI Downconverter
  • DWP-U-R1 Worldwide Power Supply for AJA Mini-Converters
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description

    AJA 4K2HD specs

    Input Formats 4K Inputs supported:

    4 x 1.5GHz SDI:
    • 4 x 1920x1080p 4:2:2, 23.98, 24, 25, 29.97, 30
    • 4 x 1920x1080psf 4:2:2, 23.98, 24, 25, 29.97, 30
    • 4 x 2048x1080p 4:2:2, 23.98, 24
    • 4 x 2048x1080psf 4:2:2, 23.98, 24

    2 x dual-stream 3GHz SDI (level B):
    • 2 x 2 x 1920x1080p 4:2:2, 23.98, 24, 25, 29.97, 30
    • 2 x 2 x 1920x1080psf 4:2:2, 23.98, 24, 25, 29.97, 30
    • 2 x 2 x 2048x1080p 4:2:2, 23.98, 24
    • 2 x 2 x 2048x1080psf 4:2:2, 23.98, 24

    4 x 3GHz SDI:
    • 4 x 1920x1080p 4:2:2, 50, 59.94, 60 (25, 29.97, 30 output)
    • 4 x 1920x1080p 4:4:4, 23.98, 24, 25, 29.97, 30
    • 4 x 1920x1080psf 4:4:4, 23.98, 24, 25, 29.97, 30
    • 4 x 2048x1080p 4:4:4, 23.98, 24
    • 4 x 2048x1080psf 4:4:4, 23.98, 24

    HD Inputs supported (4:2:2 if Single Link or 4:4:4 if Dual Link)
    • 720p 50, 59.94
    • 720p 23.98, 24, 25, 29.97, 30, 50, 59.94
    • 1080i 25, 29.97, 30
    • 1080p 23.98, 24, 25, 29.97, 50, 59.94, 60
    • 1080psf 23.98, 24, 25, 29.97, 50, 59.94, 60

    SD Inputs Supported:
    • 525i
    • 625i


    Video Inputs 4 x BNC, 3G/HD/SD-SDI (auto-selected)
    Video Outputs 1 x BNC, 3G/HD/SD-SDI
    1 x HDMI 1.4 Type A, 30/36 bits per pixel, RGB or YUV
    Audio Input SDI embedded audio, 24-bit, 8-channel
    Audio Output SDI embedded audio, 24-bit, 8-channel
    HDMI embedded audio, 24-bit, 8-channel
    USB Connection 1 x USB 2.0 (for connection to Mac or PC)
    Power +5 VDC regulated, 3 watts
    Dimensions 5.76 x 4.02 x 0.90" (14.63 x 10.21 x 2.29 cm)
    Weight Not specified by manufacturer
    Packaging Info
    Package Weight 1.6 lb
    Box Dimensions (LxWxH) 7.3 x 5.8 x 4.3"

    AJA 4K2HD reviews

    4K2HD 4K/UHD to 3G/HD/SD-SDI and HDMI Downconverter is rated 4.5 out of 5 by 2.
    Rated 4 out of 5 by from Small but likely vital niche item For a long, long time I have been looking for a simultaneous 4K/UHD & HD display solution for viewing native resolution on a client monitor while also working with an HD Grade monitor and outboard waveform-vector scope. Not an easy thing to do, or to find... or then to integrate and coax into functionality. Because we are now dealing with an alphabet-soup list of resolutions, frame rates, bit-depths, bit-densities (bps), color spaces, sampling Y/C components and (all with their own sub-families of sub-lists), the Auto feature is much, much appreciated. Coupled with its on-screen menu, this device also has the capability of helping with some aspects of format analysis. The last star could be earned with some refinements of its input analysis, as it can be spoofed into Dual Link if two valid SDI inputs are applied - in my case because I use a Videohub for routing picture. The workaround requires manual input on the operator's part to describe the change to explicitly configure a singlelink feed if you're switching back and forth between UHD and HD timelines from within an application like Resolve. Worth the wait.
    Date published: 2016-07-04
    Rated 5 out of 5 by from The AJA 4K2HD has proven to be very helpful. The AHA 4K2HD made it possible to view my 4K productions on my SDI HD Color Correction Monitor. It's easy to use, just download the AJA Config, and you're off to the races.
    Date published: 2018-10-24
    • y_2018, m_11, d_15, h_17
    • bvseo_bulk, prod_bvrr, vn_bulk_2.0.9
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_2
    • loc_en_US, sid_1005908, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
    • clientName_bhphotovideo
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    AJA 4K2HD Q&A

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