Retrieval in multimedia presentations (original) (raw)

PressBase : a presentation synchronization database for distributed multimedia systems

IEEE Transactions on Multimedia, 2006

Multimedia presentations are the basic objects of multimedia databases. Since a multimedia presentation is not an instant display of a query result, the control knowledge (or synchronization requirements) has to be incorporated into the database and necessary precautions have to be taken for a lengthy presentation. Active databases provide a mechanism for incorporation of control knowledge by using Event-Condition-Action (ECA) rules. In this paper, we describe how multimedia synchronization can be handled within a database using ECA rules. We present a prototype presentation synchronization database, named as PressBase, for distributed multimedia systems. We have adopted one of the synchronization models, SynchRuler [5], and then incorporated into a relational database system.

Managing synchronization and time factors in multimedia presentation

Information and Software Technology, 1993

We propose a simple and efficient way to synchronize multimedia presentation. First, we introduce a conceptual multimedia system architecture in which synchronization actions are performed globally by a Global Synchronization Manager (GSM) which is part of the Multimedia Database Management System, and locally by Media Specific Synchronizers. Next, we propose a presentation scenario convention that is easy to create and manipulate. We assume that synchronization is driven by real time and not by synchronization events, and that coordination of scenario entries with Global Time (GT) is managed by the GSM. User interaction with the presentation creates entries in the GSM log of special events which in coordination with the relationship matrix will adjust the actual time included in the scenario entries. Entries in the presentation scenario contain presentation actions that are fired (activated) when the time field of that entry rendezvous with the GT. multimedia data, system architecture, synchronization, time factor, interaction Vol

Avoiding retrieval contention for composite multimedia objects

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON VERY LARGE DATA BASES, 1995

An important requirement for multimedia presentations is the ability to compose new multimedia objects from the existing ones using temporal relationships. When compositions of continuous media objects are speci ed dynamically, the task of displaying these objects poses new challenges. These challenges are addressed in this paper. We show that in the case of a single composite object retrieval, a prefetching technique, simple sliding, provides an approach to reduce latency and bu ering requirements. We extend ...

Automated Annotation of Synchronized Multimedia Presentations

Semantic annotation of multimedia data for improving search engine performance is an important issue. We have focused on the automated annotation of video recordings of university lectures. Most times these lectures are supported by a desktop presentation provided by the lecturer. This presentation in general contains an outline of the given lecture and thus, enables automated annotation of the corresponding video recording. We have implemented a tool for automated MPEG-7 annotation of video recorded lectures, which enables efficient content based search within a video database. Given a particular search term our search engine prototype is able to deliver only the relevant sequences of the matching video recordings.

Automated annotations of synchronized multimedia presentations

… the Gap: From Information Extraction to Semantic …, 2006

Multimedia Presentation System Harmony with Temporal and Active Media

1991

This paper proposes a multimedia presentation system Harmony which can deal with temporal and active media such as motion video, computer animation, and music sounds. Harmony is based on the notion of a hyperobject which integrates a hypertext system with an object-oriented framework. Each object is considered a node as is usual in hypertext systems, and the relations between objects are represented as links between nodes. Harmony extends the ordinary notion of a link. A link in Harmony consists of three components: objects connected by the link, conditions specifying when the link is navigated, and messages sent to the target object. In addition to such an extension, each object can include internal objects called subobjects which specify parts of an object and can become a source/destination of a link. Furthermore, the notion of a group object is introduced to represent a synchronization of parallel displayed media information. Through these extended notions of a hypertext model, temporal and active media can be easily handled through the description of temporal relations from the media in hypermedia documents. Based on the design of Harmony, we have implemented a prototype multimedia presentation system which deals with text, music, graphics, motion video, and computer animation as objects. Harmony consists of three subsystems: link manager subsystem (Harmony/LM), user interface subsystem (Harmony/UI), and object-oriented database (Harmony/DB), where a commercial objectoriented database was employed as the Harmony/DB. Scenario viewer was developed for displaying the structure of scenario in a tree graph which can reduce a cognitive overhead in a hypermedia document. The whole system was constructed based on C++ language.

Synchronization Relation Tree: A model for temporal synchronization in multimedia presentations

1992

Schemes for specifying synchronization relations between multimedia data have important rami cations from user level speci cation to system level schedule generation. This paper examines the problems of synchronizing multimedia objects in a multimedia presentation. We present a scheme to handle the general problem of temporal relationship speci cation and scheduling. The scheme proposes a two phased approach with a speci cation phase and a scheduling phase. The rst phase focuses on assisting users to construct a consistent temporal relationship speci cation. The second phase ensures that the actual presentation proceeds according to the consistent temporal relationship speci cation despite dynamic factors such as resource contention. The use of Synchronization Relation Tree (SRT) as a formal temporal relationship speci cation to capture the temporal information is proposed. Consistency checks can be performed on the SRT during the speci cation phase. In order to guarantee the temporal relationships among various media objects as speci ed in a SRT, a pair of message passing protocols is proposed to generate the accurate timing values required for actual presentation of the multimedia objects.

Retrieval in multimedia presentations (original) (raw)

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