The Internet Video Problem:

The Internet was never designed for Video

"Best-Effort” Transport Only

No Prioritization

Routers Drop Packets to Alleve Congestion

Dynamic Load Balancing Reorders Packets

Traffic is either UDP or TCP

UDP Transport is Real-Time, but Lossy

No Inherent Packet Recovery

No Guarantees on Packet Order

TCP Uses Positive Acknowledgement Packet Recovery

Not Real-time: Pauses for Unrecoverable Packets

Max Bitrate Limited by Distance & Node Hops

The Internet Video Solution: ARQ - Automatic Repeat Request

Automatic Repeat reQuest

Feedback Requests Resending Lost Packets

Receiver Delay to Allow Time for Recovery

Add Receiver Buffer to Create Delay

More Resilience → Larger Buffer

Lower Latency → Smaller Buffer

Capable of 100% Recovery

Capable of Full Recovery with Large Loss %

Zero Overhead on a Clean (Lossless) Network

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