Fourteen contributions describe audio watermarking methods based on spread spectrum, parametric synthesis, correlation detection, chaotic signal, echo hiding, peak point extraction, and time frequency approaches. Later chapters evaluate the robustness of patchwork algorithms, the quality of watermarked data, speech watermarking algorithms, and watermarking security. The preface and most chapters would have benefited from review by a native English editor. Annotation ©2007 Book News, Inc., Portland, OR (booknews.com)