Signal Processing, Perceptual Coding and Watermarking of Digital Audio: Advanced Technologies and Models

He (SRS Labs) proposes a psychoacoustic model for digital perceptual audio coding and digital audio watermarking. The model takes advantage of the flexibility of discrete wavelet packet transform (DWPT) decomposition to closely approximate the critical bands and allows precise masking thresholds, resulting in increased inaudible spectrum and reduction of sum to signal masking ratio (SSMR). The final chapter presents a fast and robust synchronization algorithm for watermarking which exploits the consistency of the signal energy distribution under varying transformation conditions and uses matched filter detection to determine the precise watermark location. Annotation ©2011 Book News, Inc., Portland, OR (booknews.com)