Proceedings of the IEEE

This tutorial paper reviews the theory and design of codes for hiding or embedding information in signals such as images, video, audio, graphics,and text. Such codes have also been called watermarking codes; they can be used in a variety of applications, including copyright protection for digital media, content authentication, media forensics, data binding, and covert communications. Some of these... View full abstract»

Unlike traditional passive harmonic filters, modern active harmonic filters have the following multiple functions: harmonic filtering, damping,isolation and termination, reactive-power control for power factor correction and voltage regulation, load balancing, voltage-flicker reduction, and/or their combinations. Significant cost reductions in both power semiconductor devices and signal processing... View full abstract»

This paper presents an overview of the state of the art in reactive power compensation technologies. The principles of operation, design characteristics and application examples of Var compensators implemented with thyristors and self-commutated converters are presented. Static Var generators are used to improve voltage regulation, stability, and power factor in ac transmission and distribution sy... View full abstract»

The article presents a survey of the history of electrical and electronics engineering as seen in the 136 special issues and special sections of the Proceedings of the IEEE, from 1963 to 1987, in seven areas: Circuits and Devices(microelectronics and lasers and electrooptics); Computers; Communications; Signals, Systems, and Control; Electromagnetics; Energy, Power, and Industry and Engineering an... View full abstract»