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ASI/SDI Interface Cards for PCI Express

Redesigned from the ground up using state-of-the-art technology, this new line of professional SDI cards for 24/7 operation have a price-performance ratio that is unrivaled in the industry.
All cards share the same powerful real-time API that is easy to use.


"Colorado" Line

DTA-2175 DTA-2172 DTA-2174B DTA-2178 DTA-2178-ASI
List price The suggested retail price for the product. Quantity discounts and OEM arrangements may apply. Please direct OEM queries directly to one of the DekTec offices.
€ 495 € 495 € 725 € 995 € 795
#SDI ports 2 2 4 8 8
Connectors BNC
micro BNC Miniaturized version of a standard BNC connector, allowing for higher connector density.
Please note that DekTec does not supply micro-BNC to BNC patch cables with these boards. For best performance, do not use patch cables. Instead, system-interconnect cables should be directly fitted with micro-BNC connectors.
micro BNC micro BNC micro BNC
Bidirectional ports ASI/SDI port that can be configured from software, as input or output, and as SDI or ASI. Each ports can be configured independently from the other ports.
1 in, 1 out
3G-SDI level A+B Standard: SMPTE ST 425-0:2014
ST 425 describes three different mapping schemes for transporting video, audio and ancillary data into a serial digital interface operating at a nominal rate of 3 Gbit/s (1080p50/60). DekTec SDI cards support both Level A direct mapping and Level B Dual Link (B-DL) mapping.
Relay bypass Hardware relay that automatically connects the SDI/ASI input to the output upon an application crash or PC power failure. This feature enables highly-available system configurations without requiring an external failover switch.
Genlock Method to synchronize SDI outputs to a 'genlock' signal that is connected to the genlock input port of the card. Both bi- and tri-level sync signals are accepted.
Genlock Genlock
Low profile
PCI Express Gen2 x1 Gen2 x4 Gen3 x4 Gen3 x8 Gen3 x8
DTA-2175 DTA-2172 DTA-2174B DTA-2178 DTA-2178-ASI
Payload identifier Standard: SMPTE ST 352:2013
The "payload identifier" is an ancillary data packet that describes the characteristics of the SDI signal, including the picture rate, sampling structure, aspect ratio, bit depth and link assignment.
The Matrix API allows easy insertion/or and extraction of the payload identifier.
4K 2SI mapping Standard: SMPTE ST 425-5:2015, ST 435-1:2012
2-sample interleave division, a method to map a 4K image to four sub-images.
2SI is defined in ST-435-1. Each sample in a 2x2 block is put in a different sub-image. Each sub-image contains the full image, downsampled by a factor of 2 in horizontal and vertical direction.
2SI is the offical method prescribed by SMPTE ST 425-5, but in practice the informal quadrants method is used a lot.
4K quad link Standard: SMPTE ST 425-5:2015
Method to transport 4K images over four 3G-SDI links.
DekTec cards support two mappings from 4K images to four links: 4K 2SI mapping and 4K quadrant mapping. The mapping method can be selected by software.
4K quadrants Standard: SMPTE ST 425-5:2015, ST 435-1:2012
The "Quadrant" method to map 4K images to four sub-images: Each sub-image is one quadrant (one quarter) of the 4K image. This method is described in Annex B of the ST 425-5. This is an "informative" (=not normative) annex, yet in practice this method is used a lot.
4K to HD scaling Scaling 12G-SDI to 3G-SDI in hardware. The 4K UHD image is scaled down by a factor of 2 horizontally and vertically. HANC and VANC are taken from sub-image 1 (quadrant 1) in the 12G-SDI image. The software receives 3G-SDI, reducing PCIe bus bandwidth by a factor of 4. This feature can be used for monitoring or for creating a mosaic of 12G-SDI signals.


DTA-2175 DTA-2172 DTA-2174B DTA-2178 DTA-2178-ASI
#Audio channels For SD and HD formats, the maximum number of audio channels is 16. For full HD (3G-SDI) it is 32 and for UHD 128 channels of audio are supported. Matrix API allows easy insertion (embedding) or extraction of all audio channels.
16 16/32 16/32/128 16/32/128
Audio bit depth Standard: SMPTE ST 272M:200
Each audio channel can carry 16, 20, or 24 bits per audio sample.
16/20/24bit 16/20/24bit 16/20/24bit 16/20/24bit
Audio sample rate Standard: SMPTE ST 272M:2004
DekTec products support 48Khz sampling rate for all the audio channels.
48kHz 48kHz 48kHz 48kHz
Dolby® D/E Standard: SMPTE ST 337:2015
Each audio channel can carry Dolby D/E® compressed audio (non PCM audio). Matrix API allows easy insertion/or and extraction of Dolby® D/E data.

Ancillary Data

DTA-2175 DTA-2172 DTA-2174B DTA-2178 DTA-2178-ASI
Ancillary data Standard: SMPTE ST 291M:2011
Ancillary data (also: ANC data) is non-video information embedded in an SDI stream. The DekTec Matrix API reads all ANC data packets present in an SDI frame and makes them available to your application, optionally filtered by DID (Data Identifier) and SDID (Secondary Data Idenfier).
Audio is also ANC data, but for ease of use, the Matrix API audio supports audio with dedicated data structures and API functions.
Closed captioning Standard: SMPTE ST 334-1
ST 334-1 defines the structure of packets carrying CEA-708, as well as CEA-608 closed captioning data, time code data, and ATSC A/65 closed caption descriptor information. Ancillary data packets with closed captioning are available to your application via the Matrix API by filtering on DID=0x61 and SDID=0x101 (CEA-708) or SDID=0x102 (CEA-608).
HDR/WCG metadata Standard: SMPTE ST 2108-1:2018
ST 2108 defines the transport of High Dynamic Range (HDR) and Wide Color Gamut (WCG) metadata in ancillary data packets. These HDR/WCG packets are available to your application via the Matrix API by filtering on DID=0x41 and SDID=0x0C.
Time code Standard: SMPTE ST 12-1:2014, ST 12-2:2014
ST 12-1 and ST 12-2 specify the format of time codes to label video frames, and the way time codes are encoded in ancillary data packets. Time codes in ancillary data packets are available to your application by filtering on DID=0x60 and SDID=0x60.
VBI data Standard: SMPTE ST 2031:2007
ST 2031 specifies how to carry data streams carried in MPEG-2 transport streams such as subtitles, teletext, WSS, SCTE127, AMOL, VITC, and CEA-608 data as ancillary data packets in the vertical ancillary data space (VANC). Ancillary data packets with VBI data are available to your application by filtering on DID=0x41 and SDID=0x08.


DTA-2175 DTA-2172 DTA-2174B DTA-2178 DTA-2178-ASI


DTA-2175 DTA-2172 DTA-2174B DTA-2178 DTA-2178-ASI
Windows 7, 8, 10 7, 8, 10 7, 8, 10 7, 8, 10 7, 8, 10
Windows Server 12, 16, 19 12, 16, 19 12, 16, 19 12, 16, 19 12, 16, 19
Linux ≥2.6.18 ≥2.6.18 ≥2.6.18 ≥2.6.18 ≥2.6.18
Power consumption 2.6W 6.4W 10.5W 15W 15W
LxWxH card For PCI Express cards only: dimensions of the card without PCIe bracket.
75 x 69 x 15mm 120 x 69 x 15mm 120 x 69 x 15mm 120 x 69 x 15mm 120 x 69 x 15mm
LxWxH full (-LP) Dimensions of the full product. For low-profile PCI Express cards, the dimensions of the product with the low-profile bracket mounted are shown.
95 x 80 x 18mm 131 x 80 x 18mm 131 x 80 x 18mm 131 x 80 x 18mm 131 x 80 x 18mm