Multimedia Applications by Ralf Steinmetz, Klara Nahrstedt (auth.)

By Ralf Steinmetz, Klara Nahrstedt (auth.)

Multimedia Applications discusses the elemental features of multimedia rfile dealing with, programming, protection, human desktop interfaces, and multimedia software companies. the general objective of the publication is to supply a extensive figuring out of multimedia structures and functions in an built-in demeanour. A consumer enjoys a multimedia software provided that all items of the end-to-end answer healthy jointly. which means a multimedia program and its person interface has to be constructed in an built-in style with underlying multimedia middleware, working structures, networks, defense, and multimedia devices.

In this ebook we'll current basic details and homes of hypermedia record dealing with, multimedia protection and numerous facets of multimedia purposes. specially of curiosity to the readers may be information regarding record dealing with and their criteria, programming of multimedia functions, layout of multimedia info at human laptop interfaces, multimedia safety demanding situations corresponding to encryption and watermarking, multimedia in schooling, in addition to multimedia functions to help training, processing and alertness of multimedia content material.

Ralf Steinmetz is Professor of Multimedia Communications on the Technische Universität Darmstadt, Germany, and he's chairman of the Board of the Telemedia heart httc.. including greater than 20 researchers, he's practising his imaginative and prescient of "truly seamless multimedia communications". He has co-authored over two hundred refereed guides, serves as a member of the board of various specialist committees, is an ICCC Governor, and is a Fellow of either the IEEE and the ACM.

Klara Nahrstedt is the Ralph and Catherine Fisher Professor on the division of desktop technology, college of Illinois at Urban-Champagne, united states. She is knowledgeable within the region of multimedia structures and networks and makes a speciality of caliber of carrier administration difficulties. presently, she serves because the editor-in-chief of the ACM/Springer Multimedia platforms Journal.

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Application Development Approaches Development tools, mainly for publishing documents in electronic form or the creation of presentations, have been used to allow authors with little or no knowledge of a (multimedia) programming language to create and edit such applications. These development tools are called authoring systems. Another approach is based on visual programming. This approach attempts to use audiovisual technologies to improve conventional software development. Chapter 3 • Programming 30 Authoring Systems Authoring systems are based on either of the following approaches: • Script-based systems, such as the HyperCard system developed for the Macintosh in 1987, are the oldest authoring systems.

Directlnput supports access to user interaction devices (mouse, keyboard, joystick). This collection of interfaces forms the so-called hardware abstraction layer (HAL). To achieve further hardware independence, DirectX Foundation additionally includes a hardware emulation layer (HEL). , 3D functions in graphics accelerator cards), which are not directly supported by the actual hardware. , animations, media streaming, synchronization of multimedia elements, and user interactions. The DirectX Media Layer includes the following components: DirectShow, DirectAnimation, Direct3D Retained Mode, and DirectPlay.

Objects communicate among themselves by exchanging messages. When an object receives a message, it executes a method that specifies how the object has to respond when it receives that message. Sending messages between objects can be compared to functional or procedural calls in functional or procedural languages. Methods and Messages 34 Chapter 3 • Programming Aggregation When objects are built so that they use other objects, we speak of aggregation. Aggregation can be used to describe an is-part-oJ relationship between objects.

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