Universal multimedia access from wired and wireless systems

Abstract

Abstract. Personal computing and communication devices such as computers, personal digital assistants (PDAs), and mobile phones are moving to their next generation in which the end user will be able to access a multitude of information with a single device either locally or through a network. One likely trend in future personal computing and personal communication is that there will not be a single but several equivalent devices available to users allowing access to information in various forms. Each user, depending on his/her needs would access one or several among them depending on the situation and his/her preference. Using existing protocol mechanisms, in this case, a mapping and negotiation of resources during connection setup would be performed, which would remain in place throughout the life of the connection.This paper provides an overview of universal multimedia access (UMA), a concept for accessing multimedia content through a variety of possible schemes, and discusses some of the issues that arise regarding its deployment. In particular, UMA will provide a solution for adapting the delivered content when users attempt to access their choice irrespective of their terminal characteristics and communication infrastructure, as opposed to the assumption that the content remains fixed and the objective is to deliver the original content at all times. This recognition represents the impetus for the development of media descriptions and hence UMA; that is, the notion that valuable information can be derived from a variety of conversions of a multimedia content source.The issues discussed are future requirements on content servers and multimedia viewers, media conversions, UMA protocols, and UMA network architectures. The problems addressed are quality of service issues in network solutions for multimedia communications

An Objective Perceptual Quality-Based ADTE for Adapting Mobile SVC Video Content

“…However, the diverse properties of present-day networks (e.g., bandwidth, delay, and jitter) and devices (e.g., display resolution and energy consumption) impose restrictions on the way multimedia resources can be accessed and consumed. This observation explains the need for multimedia services that are in line with the vision of Universal Multimedia Access (UMA) [1].…”

MPEG-based personalized content delivery

“…In application domains like TV-on-demand, the WWW and mobile telecommunications, personalization enables different users and terminals to access rich multimedia content transparently. This is referred to as Universal Multimedia Access (UMA) [1]. This paper describes a personalized content delivery system that is based on ISO's Moving Picture Experts Group (MPEG) standards family.…”

“…The concepts underlying the present work were set out by Perkis et al in a paper on UMA from wired and wireless systems [1]. In their paper [2], Fossbakk et al describe a test bed for simulating a UMA enabled system using members of the MPEG family for its realization.…”

Dynamic multimedia adaptation and updating of media streams with MPEG-21

“…It is used by all the players in the delivery and consumption chain [2]. This paper focuses on the Digital Item Adaptation (DIA) Tools part of MPEG-21 which specifies metadata and mechanisms related to the usage environment and to media resource adaptability.…”

“…These tools are the basis for the proposed test-bed. Since the scope of MPEG-21 is very broad, interested readers are referred to references for information on the other areas of MPEG-21 [1,2,3].…”