MPEG-7 Systems: overview

Abstract

This paper gives an overview of Part 1 of ISO/IEC 15939 (MPEG-7 Systems). It first presents the objectives of the MPEG-7 Systems activity. In the MPEG-1 and MPEG-2 standards, "Systems" referred only to overall architecture, multiplexing, and synchronization. In MPEG-4, in addition to these issues, the Systems part encompasses interactive scene description, content description, and programmability. MPEG-7 brings new challenges to the Systems expertise, such as languages for description representation, binary representation of descriptions, and delivery of descriptions either separate or jointly with the audiovisual content. The paper then presents the description of the MPEG-7 Systems specification, starting from the general architecture up to the description of the individual MPEG-7 Systems tools. Finally, a conclusion describes the status of the standardization effort, as well as future extensions of the specification.

Content on demand video adaptation based on MPEG-21 digital item adaptation

“…MPEG-7 defined both syntactic and semantic decompositions to describe syntactic and semantic content in parallel [28,29]. [28] gave an overview of the MPEG-7 description definition language.…”

“…[28] gave an overview of the MPEG-7 description definition language. Besides objectives and specification of MPEG-7 systems, new challenges were discussed in [29], such as the delivery of descriptions either separate or jointly with the audio-visual content, and the like. Recently, media adaptation was achieved by using MPEG-21 digital item adaptation framework [30,31].…”

The MPEG-7 visual standard for content description-an overview

“…The MPEG-7 Description Definition Language allows to flexibly define MPEG-7 Description Schemes based on XML schema [11]. Finally, how descriptors or description schemes are being stored, accessed or transmitted will be specified in the MPEG-7 Systems specification [12]. …”

“…The purpose of this paper is to provide a broad overview of the MPEG-7 content-based visual descriptors. For an overall overview of the MPEG-7 Standard, more detailed descriptions of MPEG-7 content-based visual, audio and speech descriptors, the reader is referred to the literature in [2], [3] and to the remaining papers of this Special Issue on MPEG-7 in [5]- [12].…”

Video Compression by Neural Networks

“…The application areas that benefit from audiovideo content description are multiple, from web search of multimedia contents to media broadcasting, from services in arts (e.g. in art galleries) to home entertainment, to database (of multimedia data) applications [67]- [70]. Descriptions provided by MPEG-7 are independent of the compression method and have to be meaningful just in the context of the considered application.…”