We present a review of the diversity of concepts and motivations for improving the
concentration and resolution of timefrequencydistributions (TFDs) along the individual …

An in-depth treatment of algorithms and standards for perceptual coding of high-fidelity
audio, this self-contained reference surveys and addresses all aspects of the field. Coverage …

In this paper, we introduce a novel watermark representation for audio watermarking, where
we embed linear chirps as watermark signals. Different chirp rates, ie, slopes on the time …

A distributed virtual reality system allows remote users to share and to view a common
virtual environment via connected networks. However, network latency and bandwidth are …

This dissertation makes contributions to the sparse approximation and efficient
representation of complex signals, eg, acoustic signals, using greedy iterative descent …

With the development of the Internet and the multimedia tools, reproduction and
redistribution of digital data, such as images, audio and video have become easier than …

We propose a novel approach to detect the watermark message embedded in images under
the form of a linear frequency modulated chirp. Localization of several time-frequency …

Abstract Analysis of nonstationary signals is a challenging task. True nonstationary signal
analysis involves monitoring the frequency changes of the signal over time (ie, monitoring …

Most of the real-world signals in nature are non-stationary, ie, their statistics are time variant.
Extracting the time-varying frequency characteristics of a signal is very important in …

A new robust image watermarking algorithm that embeds multiple watermark bits in the host
image is proposed. Linear chirps are embedded as watermark messages, where the slopes …