Lionel Ph'd
Software Engineer at Google
Greater Stockholm Metropolitan Area Sweden
Summary
👤
Senior🎓
Top SchoolLionel Ph'd is a software engineer and signal-processing specialist with 13 years of experience building production audio systems for companies like Google, Cirrus Logic and Skype. He blends deep research credentials (PhD in Signal Processing) with hands-on embedded and firmware work—contributing to high-profile open-source projects such as Sound Open Firmware where he integrated Google AEC and made architecture-level changes for Xtensa. His expertise spans real-time audio algorithms, fixed-point embedded implementations, multirate processing and measurement-driven tuning for meeting-room and amplifier systems. Comfortable moving between MATLAB prototypes, C/C++ firmware and Python tooling, he focuses on robust, production-ready audio quality and protection algorithms. Based in the Stockholm area, he pairs a passion for music with hobbies in sailing, handcrafts and privacy-minded computing, reflecting an engineer who values both craftsmanship and thoughtful system design.
13 years of coding experience
15 years of employment as a software developer
Master's degree Signal Processing Acoustics Image and Optinimization, Master's degree Signal Processing Acoustics Image and Optinimization at Toulouse INPIngénieur électronique et traitement du signal, Ingénieur électronique et traitement du signal at ENSEEIHTDoctor of Philosophy - PhD Signal Processing, Doctor of Philosophy - PhD Signal Processing at Toulouse University
German, Swedish, French, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (10)
c1710
firmware10
audio10
embedded10
c1110
dspic10
sys10
dspace10
xtensa10
topology8
Programming languages (5)
Github contributions (5)
thesofproject/sof
Dec 2021 - Jul 2022
Sound Open Firmware
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:79 reviews, 54 commits, 47 PRs in 6 months
Contributions summary:Lionel made significant contributions to the Sound Open Firmware (SOF) project, focusing on audio processing and firmware development. They implemented core changes, including modifications to iterator types for audio muxing, and added atomic operations for Xtensa architecture. Additionally, the user integrated a Google Acoustic Echo Cancellation (AEC) component, which involved setting up buffers, and implementing the necessary API calls to the google audio processing library. Several topology updates demonstrate a focus on platform integration.
firmwaremidiaudiodspsound
lkoenig/sof
Dec 2021 - Oct 2022
Sound Open Firmware
Contributions:41 pushes, 57 branches in 10 months
midifirmwaresoundaudio
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