Telcordia Technologies

About: Telcordia Technologies is a based out in . It is known for research contribution in the topics: Network packet & Node (networking). The organization has 3097 authors who have published 4737 publications receiving 237882 citations.

A system and method for automatically screening and directing incoming calls

Abstract: A system and method that allow a subscriber to have incoming telephone calls automatically screened and directed is described The system allows a subscriber to automatically manage his incoming communications in a way that is easy to control and which requires a minimum of unnecessary interruptions The system includes a graphical user interface (GUI) which is accessible through the subscriber's personal digital assistant (200), a Network Interface (304), a service control module (306), and a database (308) The system and method allow a subscriber to have all of his incoming telephone calls screened in order to identify those that are of the high importance to the subscriber The subscriber controls this system by user-friendly interfaces to a name and telephone number database and an appointment calendar database By entering schedule information into an appointment calendar (including times and locations of meetings and other events) and by entering client's information into the name and telephone number database, the subscriber indicates how to locate the subscriber so that important calls will reach him immediately These databases also tell the system which clients are of high priority to the subscriber so that lower priority calls can be directed to a voice mail system for access at the subscriber's convenience or routed to an attendant for action

Halftone Visual Cryptography Via Error Diffusion

Abstract: Halftone visual cryptography (HVC) enlarges the area of visual cryptography by the addition of digital halftoning techniques. In particular, in visual secret sharing schemes, a secret image can be encoded into halftone shares taking meaningful visual information. In this paper, HVC construction methods based on error diffusion are proposed. The secret image is concurrently embedded into binary valued shares while these shares are halftoned by error diffusion-the workhorse standard of halftoning algorithms. Error diffusion has low complexity and provides halftone shares with good image quality. A reconstructed secret image, obtained by stacking qualified shares together, does not suffer from cross interference of share images. Factors affecting the share image quality and the contrast of the reconstructed image are discussed. Simulation results show several illustrative examples.

SuperBook: an automatic tool for information exploration—hypertext?

Abstract: The goals and methods of the text browser, SuperBook, are compared with those of hypertext systems in general. SuperBook, intended to provide improved access to text existing in electronic form, employs cognitive tools arising from human computer interaction research, such as full-text indexing, adaptive aliasing, and dynamic views of hierarchical information. Superbook automatically preprocesses on-line text written for paper publication, and produces a multi-window display, including a dynamic table of contents, pages of text, and a history of search words. Although SuperBook and hypertext share common goals of improved search and navigation, SuperBook is designed for accessing existing documents while most hypertext systems are better suited for authoring new information structures. Further studies are needed to evaluate the effectiveness of each of these kinds of systems.

Encoding and decoding of femtosecond pulses

Abstract: We demonstrate the spreading of femtosecond optical pulses into picosecond-duration pseudonoise bursts. Spreading is accomplished by encoding pseudorandom binary phase codes onto the optical frequency spectrum. Subsequent decoding of the spectral phases restores the original pulse. We propose that frequency-domain encoding and decoding of coherent ultrashort pulses could form the basis for a rapidly reconfigurable, code-division multiple-access optical telecommunications network.