Methods of Time-Frequency Analysis in Authentication of Digital Audio Recordings
Rafał Korycki · International Journal of Electronics and Telecommunications · 2010
Methods of Time-Frequency Analysis in Authentication of Digital Audio Recordings This paper describes the problem of tampering detection and discusses the main methods used for authenticity analysis of digital audio recordings. For the first topic, two frequency measurement algorithms based on electric network frequency criterion are applied. Time-frequency analysis is used and improved with reassignment method for purpose of visual inspection of modified recordings. The algorithms are shortly described and exemplary plots are presented with interpretation. The last described method, recently proposed, is based on checking frame offsets in compressed audio files.