Abstract: The present invention describes a privacy-preserving audio-visual (AV) processing system. The system is configured to transform raw AV data into non-reconstructable embeddings in real-time, immediately discarding the original sensitive data within milliseconds. This process enables AI-based event analysis solely on these secure embeddings, significantly mitigating privacy risks associated with traditional surveillance. Furthermore, the system incorporates a cryptographically auditable override mechanism, allowing authorized temporary access to buffered raw data, with all such events immutably logged, often via blockchain technology, ensuring accountability and regulatory compliance. The innovation's value is emphasized through its unique combination of these existing technologies, making it particularly suitable for sensitive environments like healthcare facilities and private homes where strict privacy is paramount.