Episode 3: Inside LiveU’s LRT: How Adaptive Bitrate, FEC & Packet Recovery Power Unbreakable Streams
By Stephanie R
When you’re broadcasting live from the field, one dropped packet can ruin a viewer’s experience. Enter LiveU Reliable Transport (LRT), a purpose-built protocol that keeps live video smooth, even when networks aren’t.
Here’s how it works:
1. Adaptive Bitrate Encoding
Rather than maintaining a fixed video bitrate, LRT uses adaptive bitrate to optimize quality based on available bandwidth. If network congestion hits, it scales down to avoid buffering — and scales back up as conditions improve.
2. Dynamic Forward Error Correction (FEC)
LiveU’s FEC inserts redundant data packets into the stream. If part of the video is lost, the system can reconstruct missing pieces on the fly, making the stream more tolerant to errors.
3. Acknowledgment & Resend
LRT uses a two-way communication system. It tracks packet delivery in real time, and if a packet is lost or corrupted, it’s quickly resent without disrupting the viewer’s experience.
4. Packet Reordering
In real-world networks, packets often arrive out of order. LRT reassembles them in the correct sequence before decoding, essential for synchronized video and audio.
Watch the full episode below::
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