Secure Reliable Transport

• Offer more contentto your customers to a low operating cost by transmitting over the public Internet rather than broadcasting via expensive satellite links
• SRT optimizes streaming performance across unpredictable networks with secure streams and easy firewall traversal, bringing the best quality live video to users.
• Due to advanced low latency packet loss recovery methods the streams are transported reliably over long distances in un-managed networks.

How does SRT work?

ARQ

SRT uses a retransmission technology known as Adaptive Repeat reQuest (ARQ). ARQ is the optimal method to handle the most common errors when transmitting video and audio data over the internet, such as random bursts of lost packets. ARQ works by first establishing a two-way connection between the source and destination points. Each data packet is given a unique sequence number. The receiver uses this sequence to determine if all packets have been received correctly and in the right order. If packets are missing or contain errors, the receiver creates a list of these sequence numbers and automatically requests the sender to retransmit.

Simplified Firewall Traversal

SRT uses encrypted streams and ensures easy firewall traversal by using a caller/listener handshake concept. The handshaking process used by SRT respects and maintains existing corporate security policies by allowing outbound connections without requiring dangerous, permanent exterior ports to be opened in a firewall. Chameleon, Tangram and Inca support all SRT transmission modes: caller, listener, or rendezvous.

Why use SRT?

FEC can be wasteful

Forward Error Correction (FEC) appends extra data to a transmitted signal which a receiver can use to recover corrupted or missing data. For this this technique to work, extra bandwidth for the FEC data is required. Also, FEC packets are sent whether they are needed or not. This means that if the data connection is working well, the additional bandwidth used for the FEC packets is wasted.

Non-proprietary

There are other solutions out there that can be used to deliver high-bandwidth, low-latency video streams over unmanaged networks. Most of these are proprietary solutions that can be very expensive and are only implemented in a handful of products.

Being open-source, SRT is available to all video processing developers and has been integrated into multiple platforms on the market. With the reliance on the same underlying code base, interoperability between distribution and contribution devices is simplified.

Why choose WISI for your SRT project?

• Option to transcode between MPEG-2, MPEG-4 and HEVC at contribution or distribution endpoint
• Encryption and decryption options using Verimatrix, BISS, LG Pro:Idiom, Philips VSecure or Samsung LYNK
• Receive SRT streams and output as IP, QAM, Analog, ASI or SDI
• Small footprint with power-efficient, modular solutions in 1RU
• Powerful management and monitoring tools
• Rapid configuration and deployment with an intuitive, web-based UI
• Reliable 24/7 operation thanks to quality engineering and strong technical support