Search

Recently, MPEG has opened activity to standardize scene representation for lightweight applications such as in mobile phones. The standard is named lightweight applications scene representation (LASeR) and can be applied to improve and make efficient rich media applications and services on mobile devices. In this standard, we proposed an efficient type codec for point data to maximize the bit efficiency of LASeR. In this paper, we describe the new method and the test results of the proposed scheme.

With the continuing explosion of multimedia information in today's society, searching for multimedia information by the con tents of interest is becoming more demanding. It will require an efficient metadata modeling scheme and ease-of-use querying mecha nism. In this paper, we propose a new metadata description scheme for image and video data which employs the well-defined formality of the Dublin Core description to describe the semantic feature part and the powerful facility of the MPEG-7 description to describe the vi sual and media feature part of visual information all in the XML/DTD form. It will benefit both Dublin Core users who desire to describe multimedia in their textual documents and MPEG-7 users who want to describe semantic features more formally using Dublin Core struc ture. The proposed scheme is used in the development of a metadata repository system called MRS for an easy XML/DTD manipulation of complex multimedia document description. MRS provides an easy-of-use user interface as a DTD editor and dictionary function to generate a uniform construct of multimedia document description according to the proposed scheme. This work has been conducted as a partial development of the Visual Information Repository System (VIRS) which is presently implemented under the project funding of a university-industry collaboration research program.

This paper introduces an interactive contents authoring system which can easily and conveniently produce interactive contents for the Terrestrial Digital Multimedia Broadcasting (T-DMB). For interactive broadcasting service, T-DMB adopted MPEG-4 Systems technology. In order to the interactive service becomes flourishing on the market, various types of interactive contents should be well provided prior to the service. In MPEG-4 Systems specification, broadcasting contents are described by the combination of a large number of nodes, routes and descriptors. In order to provide interactive data services through the T-DMB network, it is essential to have an interactive contents authoring system which allows contents authors to compose interactive contents easily and conveniently even if they lack any background on MPEG-4 Systems technology. The introduced authoring system provides powerful graphical user interface and produces interactive broadcasting contents in the forms of binary and textual format. Therefore, the interactive contents authoring system presented in this paper would vastly contribute to the flourishing interactive service.

In recent years, we have seen a vast increase in interactive broadcasting content research based on MPEG-4 and multimedia content description research based on the MPEG-7 standard. Also, there is a rising research area to compromise between the MPEG-4 and the MPEG-7 standard for a new application domain such as the interactive broadcasting server, and so on. Especially, MPEG-4 and MPEG-7 based interactive content allows a user to watch preferred broadcasting programs by using retrieval functionalities. In this paper, we present the first results of the MPEG-7 over MPEG-4 research and introduce the prototype of an interactive broadcasting contents authoring and searching system using the MPEG-7 over MPEG-4 scheme

Interactive broadcasting is now considered as a next generation broadcasting service, which covers territorial, mobile and wireless terminals. In interactive broadcasting, viewers not only watch the broadcasting programs but also pass their requirements to program providers. In order to represent this interactivity, it is considered that the MPEG-4 is a well-adopted standard because of its object-based scene description scheme, which is in the binary (BIFS) and textual (XMT) formats. We describe the XMT tools that can generate, manipulate and translate an XML document for the interactive broadcasting content description, and also introduce an authoring system based on the provided XMT tools. Since the XMT is a textual format, content authors can easily exchange contents with other creators, applications and tools. This exchangeability of the XMT enables the authors to create interactive broadcasting contents more efficiently and rapidly. Therefore, our XMT tools become core component modules for developing interactive broadcasting contents.

Lately, there has been a vast increase in interactive broadcasting contents research using the MPEG-4 standard and in multimedia content description research using the MPEG-7 standard. Also, there are few researches into a compromise between the MPEG-4 standard and the MPEG-7 standard for newer applications, such as an interactive broadcasting contents server, which is able to query and search. The paper presents the first results of research on the MPEG-7 interface over MPEG-4 systems, which makes it easy to search MPEG-4 content. We have developed an MPEG-7 interface embedded in MPEG-4 systems and an MPEG-4 player that provides a query function and a search function.