How the Internet helps build collaborative multimedia applications

Abstract

ApplicationsStart with the Internet itself for freely available software technologieSj then add some custom software. T FOR PROGRAMMERS, DESIGNING AND IMPLEmenting distributed multimedia applications used to be a formidable challenge. As recently as five years ago, tools were scarce for developing and integrating multimedia content, as was system support for realtime media streaming and its control. Application pioneers had little choice but to custom-build most of the technology needed for their distributed multimedia applications. Custom building typically involved such sophisticated elements as authoring tools 16], reliable audio-video transport mechanisms [9], connection management schemes [8], and agents to coordinate the behavior of cooperating application components dispersed throughout a network [5].Aside from the heavy labor requirement implied by this approach, another practical consequence was the difficulty of achieving application portability.The recent Internet revolution has greatly affected construction of networked multimedia applications. New approaches to distributing application logic (such as Java applets) and coordinating distributed processing (such as CORBA) have claimed the attention of application developers 14]. And Web browsers, such as Netscape Navigator and Microsoft Internet Explorer, now offer a universally available container in which to assemble and integrate rich interactive software components. Moreover, the range of today's multimedia toolkits and component

Un Sistema De Enseñanza Adaptativa a Distancia Basado en Tareas Y Reglas Docentes

“…Se han realizado algunos trabajos relacionados con la creación de en-tornos de enseñanza colaborativos accesibles a través de Internet (Hmelo, 1998;Maly, 1997). También se ha analizado la viabilidad de utilizar la Web como el marco de construcción de estas aplicaciones, observándose que el tiempo de desarrollo y evaluación de estos sistemas es muy largo (Nicol, 1999).…”

Self-Configuring User-Centric Communication Services

“…Nicol et al [13] developed a prototype distributed multimedia application using ready-made component technology [13], the methodology however does not address multiple communication providers. There are products such as Trillian [2], Qnext [14], and Eclipse Communication Framework (ECF) [4] that provide platforms to support multiple communication providers, while aggregating the accounts of the providers into one interface.…”

“…Collaborative multimedia application pioneers had little choice but to custom-build most of the technology needed for their distributed multimedia applications [13]. Major strides have been made over the last decade to improve the methodologies for the development of these applications, as well as the availability of multimedia toolkits to support such development.…”

Abstractions to Support Dynamic Adaptation of Communication Frameworks for User-Centric Communication

“…Unlike [76], the NCB support COTS as well as custom-built components. This work also differs from [10,54,60,62] as the NCB is viewed as a composite component and hence provides converged reusable services. While [20] provides reuse of it's services, the use of each service and provider pair needs to be explicitly stated.…”

“…Previous work in the areas of collaborative communication tend to (1) be limited in their ability to support reuse of their communication components [10,54,60,62]; (2) lack the support for automated reconfiguration at runtime of these communication components [20], (3) provide low-level interfaces defined for programmers [9,28,65,67,75] and (4) be limited in support for end user interactions [5,9,43].…”