Jin-Woo Hong

MovieMine: personalized movie content search by utilizing user comments

User comments are one of the common online resources that reflect users evaluative opinions about multimedia contents. The words used in user comments provide many clues about the users and about what they like or dislike. In this paper, we propose a novel query expansion method that utilizes user comments in order to consider users different preferences in finding movies. We propose a personalized search system, called MovieMine, built upon this proposed method to provide personalized search results by expanding queries on the basis of earlier comments left by the user. Using an actual movie review dataset obtained from a large movie portal, we show that our system produces a significant performance improvement compared to the baseline condition. We expect our approach to be readily applicable to personalized searching of multimedia contents.

Interactive contents player for rich media service

This paper presents an interactive rich media player based on MPEG-4 LASeR. Compared to the old and plain AV centric multimedia services, Rich media services provide attractive characteristics include dynamic updates of contents and interactivities among various forming multimedia data such as audio, video, graphics and text. Presented player provides necessary functionalities to supports dynamic and active characteristics of rich media services. Detailed implementation of the interactive rich media player and its capabilities are presented along with usage examples.

An architecture of augmented broadcasting service for next generation smart TV

In this paper, we propose augmented broadcasting service for next generation smart TV and verify the related technologies. The next generation smart TV is not a simple joint connection between broadcasting and broadband but a truly convergence beyond limitation of classic viewing or constrained UI/UX, and aims at truly viewer-centric broadcasting, straightforward multimedia consuming, and social network participating. Augmented broadcasting as its new broadcasting application service is to show enhanced broadcasting content on large TV screen as AR in mobile device shows the mixed content at a right position. Now the one-sided broadcasting service using AR has already been tried in virtual advertisement of sports broadcasts. Because it is to handle all augmentation before the video image is transmitted, the viewer at home may never influence this compositing, no interaction for the user is possible unless the viewer has a direct connection to the content producer. The proposed technology enables viewers to watch the mixed broadcasting contents when they want only the service and to watch the original broadcasting content when they dont. Also the method of content rendering on a receiving terminal makes every viewer choose own preferred contents or control them via UI/UX1.

A new timing model design for MPEG Media Transport (MMT)

During the recent years, broadcasting services and mobile services have started converging and it is expected that this trend will continue with other services. In order to deploy efficient solutions for the transport of MPEG media in an interoperable fashion, especially given the recent increased demand of multimedia delivery in the heterogeneous network environment, MPEG has launched a new standardization work item, called MPEG Media Transport (MMT) since the middle of 2010. In this paper, we propose an appropriate timing model for MPEG Media Transport (MMT) to support media synchronization in MMT system based media service.

Design and implementation of headend servers for downloadable CAS

This paper presents the design and implementation of headend servers for a downloadable conditional access system (DCAS) that can securely transmit CA code via a bi-directional communication channel. To design DCAS headend server, we define core functions to be performed in headend and categorize them into four sections such as authentication, provisioning, personalization and key management. Using this classification, system architecture for DCAS headend and functional block for each server are designed. DCAS headend servers based on an enhanced DCAS protocol are implemented. In order to verify the stability and effectiveness of the implemented headend servers, we construct a test-bed using them and a legacy cable headend system in a laboratory. The experimental results show that the DCAS headend servers are well designed.

Metadata Design and Verification Test Bed System for Augmented Broadcasting

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Loss-aware rate-distortion optimization for redundant picture allocation in H.264/AVC

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Design and Implementation of TV-Anytime System based on Digital Cable Television

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Audio Watermarking Techniques

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Hierarchical video encoding/decoding method for complete spatial scalability and apparatus thereof

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