Time-Frequency Analysis and Its Applications to Multimedia Signals

"Time-frequency analysis has been intensively investigated and developed in the last two decades. A variety of time-frequency distributions have been developed to provide efficient analysis of signals with a time-varying spectral content. In most cases, signal analyses in the joint time-frequency domain outperform the traditional frequency-domain approaches. Generally, the time-frequency distributions have found fruitful applications in many important fields dealing with nonstationary signals, such as biomedical, radar, seismic, telecommunications, and mechanical engineering. Additionally, a large number of applications are related to multimedia signals in speech, audio/music, image, and video signal processing, where time-frequency analysis can be employed to broaden and enhance the signal processing capabilities. Because each type of multimedia signals has its specific nature that may significantly differ from others, the applicability and method of time-frequency analysis depend on the multimedia data to be processed. This fact opens a number of challenging directions for research in the field of time-frequency analysis and its applications to multimedia signals. For instance, having the different dimensionalities of multimedia signals in mind, time-frequency analysis for one-, two-, and three-dimensional signals should be used." -- from p1.