<title>Personal video retrieval and browsing for mobile users</title>

Abstract

The latest camera-equipped mobile phones and faster cellular networks have increased the interest in mobile multimedia services. But for content consumption, delivery and creation, the limited capabilities of mobile terminals require special attention. This paper introduces the Candela platform, an infrastructure that allows the creation, storage and retrieval of home videos with special consideration of mobile terminals. Candela features a J2ME-based video recording and annotation tool which permits the creation and annotation of home videos on mobile phones. It offers an MPEG-7-based home video database which can be queried in an intelligent and user-oriented manner exploiting users' personal domain ontologies. The platform employs terminal profiling techniques to deliver video retrieval user interfaces that personalize the search results according to the user's preferences and terminal capabilities, facilitating effective retrieval of home videos via various both mobile and fixed terminals. For video playout, Candela features a meta player, a video player augmented by an interactive metadata display which can be used for fast content-based in-video browsing, helping to avoid the consumption and streaming of uninteresting video parts, thus reducing network load. Thereby, Candela forms a comprehensive video management platform for mobile phones fully covering mobile home video management from acquisition to delivery.Keywords: home video management, mobile multimedia, home video ontology, adaptive user interfaces, video personalization 1 This work was carried out under the tenure of an ERCIM fellowship.

A mobile phone-based context-aware video management application

“…This is either one of the off-the-self video players or Candela video browser which shows visualized metadata in addition to the video itself. The visualization allows the user to navigate through the video and find the relevant parts of it easily [5].…”

“…The clip annotation starts from the Metadata Selection Screen (Screenshot 1) where the user has options to annotate clip using terms in a predefined domain ontology stored in the user's personal profile (Screenshots 3-5), add text descriptions by typing the nine-button keypad (Screenshot 2), and edit settings to update personal profile information, which is automatically added to the video clip metadata. When annotating via the Ontology Screen, the domain ontology can be accessed along a three-level hierarchical structure: the main level view (3) contains top-level concepts, which are then expanded in the sub-level menus (4,5). All three levels are recorded to the clip.…”

“…An important part of the entire architecture is the MCP application MobiCon, which can be used both on a standalone basis and as part of the entire system, as shown in Figure 2. Before delving in the details of the MobiCon architecture, we briefly introduce the Candela system; more details about the Candela architecture are given in [5,6]. …”

Candela-Storage, Analysis, and Retrieval of Video Content in Distributed Systems: Personal Mobile Multimedia Management

“…In this paper, we present the CANDELA platform for personal mobile multimedia management [10]. The platform covers the full home video process from video creation, analysis and storage to personalized retrieval and delivery for various user terminals, ranging from mobile phones to PCs.…”

MobiCon: mobile video recording with integrated annotations and DRM

“…They propose leveraging contextual metadata at the point of capture to address problems of semantic and sensory gaps. The evaluated video application, MobiCon, combines point-of-capture metadata annotations and DRM parameters with a video delivery and sharing clips via the CANDELA video server [3,4].…”