VN-Matrix 325

3G‑SDI Over IP Codec
Key Features
  • Streams serial digital video with embedded audio
  • Supports 3G‑SDI, HD‑SDI, or SDI signals
  • Low latency streaming - 35 ms encode and 35 ms decode
  • 10‑bit YCrCb 4:2:2 encoding
  • Supports resolutions up to 1080p/60
  • Embedded audio
The Extron VN-Matrix 325
Model Version Description Part #
VNC 325 3G-SDI Codec for 3G-SDI 60-1249-01

The VN‑Matrix® 325 streams 3G‑SDI, HD‑SDI, or SDI video and embedded audio over IP networks to meet the emerging need for low delay, production quality transport of SD and HD video over enterprise networks. The VN‑Matrix 325 codec uses Extron's PURE3® codec which exceeds many of the performance characteristics of standards-based compression formats, delivering visually lossless imagery with low latency, and a high immunity against network errors. The VN‑Matrix 325 codec is switchable between encode and decode functionality and video decoding can be genlocked to an external SDI reference. VN‑Matrix 325 is ideal for quality-critical applications such as live video delivery across a campus, production collaboration, studio-to-studio media exchange, and original video source contribution.

PURE3 Codec

The Extron PURE3 codec applied in VN‑Matrix 325 streams audio and video across networks with very low latency, visually lossless image quality, 4:2:2 color sampling, and 10-bit color depth, maintaining original source quality. The codec can be used in real time, interactive, or collaborative applications where bi-directional communication or remote video device control would be hampered by delay. Low delay streaming can also reduce the total production and delivery time for audio and video, making it an attractive solution in many applications. PURE3 error concealment is highly immune to network errors, preserving quality even under conditions of heavy packet loss, without the typical need for additional delay or bandwidth seen with error correction technologies. PURE3 error concealment can also eliminate the need for expensive high QoS managed network services. The performance delivered by PURE3 allows VN‑Matrix 325 to be operated on a variety of network connections.

True High Definition Quality

The PURE3 codec in the VN‑Matrix 325 codec can deliver visually lossless image quality. It is ideal for applications that test and evaluate quality such as remote color grading. It can also be used to contribute real-time content into live video productions.

Extensive Bit Rate Management

The processing speed, capacity, compression and bit rate management offered by the PURE3 codec make VN‑Matrix 325 flexible for use in a wide range of applications. The demanding quality requirements of production and broadcast applications will be well served using very high bit rates, while presentation, collaboration, and monitoring applications may use moderate to low bit rates. The variety of quality and bit rate controls available in VN‑Matrix systems make them capable of fulfilling unique applications that are not served well by encoders designed for specific, mainstream applications.

Embedded Audio

The VN‑Matrix 325 supports streaming of embedded audio transparently passing four channels of lossless, synchronized audio per ancillary - ANC data block. Up to four ANC data blocks can be streamed with video carrying 16 audio channels. Alternatively, two channels of audio can be streamed alone in stereo mode delivering mono, stereo, or 5.1 surround sound in applications requiring use of lower bandwidth. Video can also be streamed without audio.

Synchronized Decoding

The VN‑Matrix 325 also supports genlocked decoding of audio and video streams across multiple decoders even when network errors are experienced. This is valuable for preserving synchronization across multiple camera feeds and video sources in production environments.

Network Flexibility

With network error concealment, the VN‑Matrix 325 does not require a dedicated network connection, managed QoS, or error correction to ensure reliable video quality. It supports both Unicast and Multicast transport protocols.


  • Live Video Delivery Across a Campus
  • Production Collaboration
  • Studio to Studio Media Exchange
  • Delivery of Contribution or Primary Distribution
  • Sports and Live Event Streaming
  • Signal Distribution Over Networks
  • Video Monitoring
  • In-house Signal Distribution and Routing
  • Virtual Switching on Networks
  • Remote Video Device Control


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VN-Matrix® 325
   Signal type SDI, HD-SDI, 3G-SDI digital video
   Resolution 8 or 10 bits, automatic
   Data rates 270 Mbps, 1.485 Gbps, 2.970 Gbps.
   Operation standards SMPTE 259M, SMPTE 296M, SMPTE 424M
   Auto data rate lock Yes
Video input and loop through — encoder configuration
   Number/signal type 1 digital component video with loop through
10 bit, 4:2:2, with auto-detection
   Connectors 3 female BNC: 1 for input, 2 for loop through (1 with messaging overlay option)
   Nominal level 0.8 Vp-p
   Impedance 75 ohms
   Data rates 1.5 Gbps to 3.0 Gbps
   Vertical frequency 23.97 Hz to 60 Hz, depending on signal format
   Resolution range 525i, 625i, 720p, 1080i, 1080p, 1080psf
Video processing — codec
   Compression PURE3® Codec
   Frame rate delay 35 ms (70 ms encoding/decoding end-to-end)
   Bit rate 6 Mbps to 250 Mbps
   Bit and frame rate control Selectable
   Frame rate Up to 60 fps @ 1080p
Video output — decoder configuration
   Number/signal type 1 digital component video
10 bit, 4:2:2, with auto-detection
    NOTE     Output signal format follows the input format at the encoder.
   Connectors 1 female BNC
   Nominal level 0.8 Vp-p
   Impedance 75 ohms
   Vertical frequency 23.97 Hz to 60 Hz, depending on signal format
   Resolutions 525i, 625i, 720p, 1080i, 1080p, 1080psf
Sync — genlock — decoder configuration
   External sync (genlock) 0.8 Vp-p (digital component video)
   Genlock connector 1 female BNC
   Output impedance 75 ohms
   Vertical frequency 23.97 Hz to 60 Hz, depending on signal format
Audio input and output
   Number/signal type 4 groups of 4 channels, embedded with video signal
   Connectors 1 female BNC (shared with video input and output)
    NOTE     Output mode (transparent pass-through or stereo) is user selectable.
Audio processing
   Transparent pass-through mode (selectable) 
      Format Embedded audio (ANC) data is transported as received.
      Compression None
      Sampling rates and bit depth 48 kHz (synchronous)
20 or 24 bit digital audio
      Standards SMPTE 299M, SMPTE 272M-A
      Transmitted payload SDI: 8 Mbps per group of 4 audio channels
HD-SDI and 3G-SDI: 16 Mbps per group of 4 audio channels
   Stereo mode (selectable) 
      Format PCM: a single stereo pair is transported.
AC3/Dolby Digital: 5.1 channels are transported.
      Compression Samping rate and bit depth decimation can be applied for uncompressed PCM audio data.
16, 20, or 24 bit digital audio; full sampling rate
16 bit digital audio, half sampling rate
16 bit digital audio, quarter sampling rate
      Sampling rates and bit depth 48 kHz
20 or 24 bit digital audio
      Standards SMPTE 299M, SMPTE 272M-A
      Transmitted payload 2.43 Mbps uncompressed
Control — host ports
   Serial host control port (1) RS-232, male 9-pin D connector (labeled "Remote") for VNC 325 configuration
   Baud rate and protocol 115200 baud, 8 data bits, 1 stop bit, no parity, no flow control
   Serial control pin configurations 1 = DCD, 2 = Rx, 3 = Tx, 4 = DTR, 5 = GND, 6 = DSR, 7 = RTS, 8 = CTS, 9 = ring
   Ethernet control port 1 female RJ-45
1 female SPF IP module
   Ethernet data rate 10/100/1000Base-T, half/full duplex with autodetect
   Ethernet protocol See the network transport section below.
   System control VN-Matrix Enterprise Controller
VN-Matrix web server
   Program control Extron Command Line Interface (CLI)
Microsoft® Internet Explorer® and other web browsers, Telnet
Control — serial port (RS-232 pass-through over LAN)
   Serial control port (1) RS-232, male 9-pin D connector (labeled "RS-232 over LAN") for third party device control across a network
   Baud rate and protocol 2400 to 115200 baud (115200 baud = default); 7 or 8 (default) data bits; 1 (default) or 2 stop bits; no parity (default), or even or odd parity; no flow control (default), or hardware or software flow control
Network transport
   Ethernet data rate 10/100/1000Base-T, half/full duplex with autodetect
   Ethernet protocol 
      Streaming RTP, RTCP
      Transport TCP, UDP (unicast or multicast)
      All supported ICMP (ping), IP, TCP, RTP, RTCP, UDP, DHCP, HTTP, SNMP V3, Telnet
   Video input/output PURE3® Codec compression
   Audio input/output Transparent pass-through or stereo, selectable
   Power supply External
Input: 100-240 VAC, 50-60 Hz
Output: 12 VDC, 3 A, 36 watts
   Power consumption 30 watts nominal, 60 watts max., 12 VDC
   Temperature/humidity Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +41 to +95 °F (5 to +35 °C) / 10% to 85%, noncondensing
   Cooling Fan, vents front to back
      Rack mount Yes
   Enclosure type Metal
   Enclosure 1.7" H* x 8.75" W x 12.2" D (1U high, half rack wide)
(4.3 cm H* x 22.2 cm W x 30.9 cm D)
*Height with feet is 2.1" (5.3 cm).
(Depth includes connectors.)
   Product weight 2.8 lbs (1.3 kg) each
   Shipping weight 8 lbs (4 kg)
   Regulatory compliance 
      Safety CE, c-UL, UL
      EMI/EMC CE, C-tick, FCC Class A, ICES, VCCI
      Environmental Complies with the appropriate requirements of RoHS, WEEE
   Product warranty 3 years parts and labor
   Everlast power supply warranty 7 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    60-1249-01 4.75" (12.1 cm) 16.25" (41.3 cm) 17.0" (43.2 cm) 7.3 lbs (3.31 kg)


Panel Drawing

Panel Drawing
© 2020 Extron. Specifications are subject to change without notice.