Kevin Liedtke
Preserving Streaming Experience Through Protocol Offload
Reducing latency and variability by aligning system architecture with user expectations for smooth, continuous media playback.
At a Glance
The move: shift packet formation off the host CPU and onto dedicated hardware so playback timing stays predictable even as load increases.
The Challenge: Performance Variability Users Can Feel
Streaming media workloads are highly sensitive to latency and timing. Even when average throughput looks fine, brief spikes in processing time show up to viewers as stutters, dropped frames, or inconsistent quality. Traditional architectures make this worse: media repeatedly crosses transcoding stages as it is processed and packaged, and each crossing adds CPU overhead and resource churn, especially under load.
That variability lands on viewers first, but it also makes the platform harder to build on, for the application developers working on top of it and the platform architects and validation engineers trying to reason about it predictably. The core challenge was not peak performance, it was cutting the overhead and variability that made streaming behavior feel arbitrary under load.
My Role: UX Architect & Systems Designer
I led the UX-driven architectural effort to protect media streaming quality by addressing the root causes of performance variability in the execution path, rather than treating playback issues as an application-level problem.
- Identified where repeated transcoding transitions created overhead and resource churn, then defined architectural models and data flows that reduced context switching while preserving lower-cost storage and flexible processing pipelines.
- Translated user expectations for consistent playback into architectural requirements around execution predictability.
- Collaborated with platform, network, and firmware engineers to evaluate where protocol responsibilities could be reassigned to reduce variability.
- Contributed to invention and patent development to formalize the approach and guide future implementation.
Approach: Reducing Variability Through Architectural Offload
This work reframed packet formation and protocol handling as an architectural responsibility, not a byproduct of application-level processing. Instead of assembling streaming protocol packets on the host CPU alongside competing workloads, the architecture moved that work closer to the hardware, cutting CPU contention and decoupling streaming execution from transient load on the host.
Key tradeoffs:
Execution churn over peak throughput
Cut repeated packet assembly and transcoding transitions that caused instability, rather than chasing peak throughput numbers.
Consistency over isolated metrics
Framed the architecture around perceived playback smoothness under load, not isolated throughput or subsystem benchmarks.
Complexity moves to the platform
Shifted complexity to the platform layer so the user-facing experience stayed simple and predictable.
Cost tradeoffs stay invisible to users
Kept using lower-cost storage and flexible pipelines without letting that tradeoff leak into playback quality.
Results, Impact, and Influence
This architecture was never implemented in shipping products during my tenure, adoption depended on future resourcing and platform roadmap timing, but it changed how streaming performance problems were framed and discussed across platform and architecture teams. Instead of treating playback instability as an application-level tuning issue, it established variability as a system-level responsibility with direct UX implications.
I authored and co-authored a patent filing that formalized the approach, capturing the UX rationale, system model, and intended integration path as a durable reference for future roadmap planning.
Key outcomes:
Reframed around predictability
Reframed streaming performance around predictability and perceived quality, not raw throughput.
Clear architectural model
Defined a clear model for cutting transcoding overhead and execution churn in the pipeline.
Ready when resourcing allows
Left a concrete, UX-aligned direction ready to adopt when platform priorities and resourcing allow.
Informed platform roadmap
Shaped longer-term hardware and platform discussions about protecting playback quality under load.
Why This Work Matters
Streaming sets a high bar for trust. Small disruptions are immediately noticeable, and users rarely attribute a stutter to system load or an architectural tradeoff, they just experience a broken product. This project is a case for treating performance variability as a UX problem to design around, not just a technical inefficiency to optimize in isolation, the same instinct I bring wherever system behavior violates what users expect.