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DTA-2178 - Eight 12G-SDI/ASI Ports for PCIe  


Eight 12G-SDI/ASI Ports for PCIe

High density, attractive price. Eight ports that can do SD to 3G, and ASI, in any mix. Ports 1 and 5 can receive or transmit full 12G-SDI to stream two times 2160p50/60. Each port can scale 4K to 2K, enabling the monitoring of eight 12G-SDI signals.


Key Characteristics

Ports 8x 12G-SDI/ASI in/out
1x genlock in

All 8 SDI/ASI ports can input 12G by scaling to 3G. Ports 1 and 5 can handle full 12G-SDI input or output.

Features 10-bit full frame access
Low latency
A/V/ANC extraction/insertion
Scaling: 1/4, 1/16
API DekTec Matrix API® 2.0

Matrix API is part of DTAPI


Connectors 9x 75-Ω micro BNC
Cable length ASI/SD-SDI - 350m
HD-SDI - 200m
3G-SDI - 150m
6G-SDI - 55m
12G-SDI - 50m
PCI Express Low-profile PCIe gen3 x8

We advise using the DTA-2178 in a PCIe x16 slot as experience with demanding applications shows that it is easier to sustain high througput.


Link 12G-SDI - SMPTE 2082
6G-SDI - SMPTE 2081
3G-SDI - SMPTE 424M (A+B)
4K multi-link SMPTE 425-5
Video formats 2160p, 1080p, 1080psf
1080i, 720p, 525i, 625i

All common formats supported

DVB-ASI EN50083-9 (coax)
0 to 214 Mbps

PC Support

OS Windows 10, 11
Windows Server 16, 19, 22
Linux ≥2.6.18, 3.x, 4.x, 5.x
Processor Core i5 minimum
Core i7 recommended

Or equivalent AMD CPUs


StreamXpress Playout TS- and SDI files
SpRcApi StreamXpress remote-control API for automated playout
StreamXpert Our industry-standard transport-stream analyzer
SdEye SDI analyzer for detailed inspection of audio, video and ancillary data
VF-REC SDI/TS recorder with looping, scheduling and more
DekTec SDKs Create your own application


The DTA-2178 is controlled by firmware that is located in on-board flash memory. You can upgrade or downgrade the firmware in the field.

Please refer to the DTA-2178 firmware page to view available firmware versions, and how to upgrade or downgrade to a specific firmware version.


The DTA-2178 is part of the DekTec-for-Developers range. Attractive OEM arrangements are available, please contact DekTec to discuss your options.

DTA-21781.139Stock: 25+
Eight 12G-SDI/ASI ports for PCIe.

The DTA-2178 comes with a full-height PCIe bracket mounted and a low-profile bracket in the box (except for OEM sales). Use DTA-2178-LP to order a DTA-2178 with low-profile bracket mounted.

DTA-2178-SLP1.379Stock: 25+
Eight 12G-SDI/ASI ports for PCIe with StreamXpert Lite and StreamXpress player software.
DTA-2178-SXP2.505Stock: 25+
Eight 12G-SDI/ASI ports for PCIe with StreamXpert analyzer and StreamXpress player software.
DTA-2178-SY-SXP3.327Stock: 25+
Eight 12G-SDI/ASI ports for PCIe with SdEye and StreamXpert analyzer and StreamXpress player software.

Prices exclude applicable sales tax, shipping charges and customs duties. Quantity discounts may be available, please request a quotation.


BNC to micro-BNC conversion cable (25cm).
Micro-BNC circular nut driver. Tool for loosening and tightening micro-BNC nuts for swapping PCIe brackets.

If the total order amount is less than EUR 200, shipping/handling costs of EUR 25 will be charged.


  • Eight independently configurable ASI/SDI ports on a single-slot low-profile PCIe card!
  • Ideal general-purpose card for interfacing uncompressed and compressed digital video streams to PCs, from ASI to 4K UHD.
  • External synchronization of SDI outputs with analogue genlock port that accepts bi- and tri-level sync signals.


  • Software-based UHD decoder and/or encoder with 12G-SDI or quad-link 3G-SDI interfacing.
  • Multi-port SDI and/or ASI applications, e.g.:
    • Live production mixers
    • Transport-stream multiplexers
    • SDI and ASI multiviewer systems
    • Multi-channel playout
    • Stream processors or transcoders
    • Compliance recorders

Firmware Variants

The DTA-2178 has three firmware variants, described in detail in application note DT-AN-2178-1. An overview of the three variants is shown below.

Variant 1 - Eight 3G-SDI/ASI channels with 12G-SDI to 3G scaling

Each channel can be configured independently as input or output, as ASI or SDI (SD, HD or 3G), or as copy of another port in a group of 4 ports. 12G-SDI input is supported by scaling to 3G in the 4K-to-2K block. Similarly, 6G-SDI can be scaled to HD.

  Variant 1 does not support 12G- or 6G-SDI output.

Variant 2 - Dual 4K channels over 12G-SDI or quad link

This variant supports two full 4K UHD streams: 2x 4K input, 2x 4K output, or 4K input + 4K output. Each 4K stream can be carried over 12G-SDI or over SMPTE 425-5 quad-link 3G.

Variant 3 - Dual 12G-SDI with ASI/SDI side channel

Two 12G-SDI input or output channels with "side channels" that can be used for downscaled SDI output (up to 3G-SDI, downscaling to be handled by the software), or an independent ASI or SDI input or output. If the side channel is an output, it can be triply-buffered on ports 2/3/4 or 6/7/8.

DekTec Matrix API® 2.0

The Matrix-API framework decodes incoming SDI data into pixels (in a programmable format), audio samples and ANC data structures. When a new frame has been received, the framework calls a user-supplied "frame-processor callback" for processing of the data. The user callback can create output video, audio and ANC data, which is encoded by the framework into SDI frames.

Synchronization of multiple input streams is straightforward: The video/audio/anc data of all SDI frames supplied to the callback function have the same arrival time by definition. Past frames can be accessed by an integer frame index. The framework ensures that if frames from different input ports have the same frame index, they have entered the system at the same time instance.

Related Products

DekTec Matrix API® 2.0 supports the DTA-2178 and all products listed below. Applications designed for one of these cards will run virtually unaltered on any of the other cards.

DTA-2178 Bird's Eye View