# Secure echo‐hiding audio watermarking method based on improved PN sequence and robust principal component analysis

> Research article (IET Signal Processing, 2020) · cited 10× · AI/ML

**Wikidata**: [openalex:W3006811850](https://www.wikidata.org/wiki/openalex:W3006811850)  
**Source**: https://4ort.xyz/entity/secure-echohiding-audio-watermarking-method-based-on-improved-pn-sequence-and-robust-principal-component-analysis