• 제목/요약/키워드: Broadcast Indexing

검색결과 58건 처리시간 0.044초

Retrieval of Broadcast News Using Audio Content Analysis

  • Kim, Hyoung-Gook
    • The Journal of the Acoustical Society of Korea
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    • 제26권3E호
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    • pp.74-79
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    • 2007
  • In this paper, we report our recent work on a indexing and retrieval system of broadcast news using audio content analysis. Key issues addressed in this work are two major parts of the audio indexing system: anchorperson detection based on audio segmentation, and phone-based spoken document retrieval, developed in the framework of the emerging MPEG-7 standard. Experiments are conducted on a database of Britisch broadcast news videos. We discuss the development of the retrieval system, and the evaluation of each part and the retrieval system.

Design and Implement of a Framework for a Hybrid Broadcast System using Voronoi Diagram for NN Search

  • Seokjin Im
    • International Journal of Internet, Broadcasting and Communication
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    • 제15권2호
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    • pp.22-30
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    • 2023
  • The portable mobile devices with high performance and high speed 5G network activate and explode the demands for ubiquitous information services that remove the limitations of time for the communication and places to request for the information. NN (Nearest Neighbor) search is one of the most important types of queries to be processed efficiently in the information services. Various indexes have been proposed to support efficient NN search in the wireless broadcast system. The indexes adopting Hilbert curve, grid partition or Voronoi diagram enable the clients to search for NN quickly in the wireless broadcast channel. It is necessary that an efficient means to evaluate the performances of various indexes. In this paper, we propose an open framework that can adopt a variety of indexing schemes and evaluate and compare the performances of them. The proposed framework is organized with open and flexible structure that can adopt hybrid indexing schemes extensible to Voronoi diagram as well as simple indexing schemes. With the implemented framework, we demonstrate the efficiency and scalability and flexibility of the proposed framework by evaluating various indexing schemes for NN query.

이동 컴퓨팅을 위한 K-Level Indexing Broadcast 기법의 성능분석 (Performance Analysis K-Level Indexing Data Broadcast Schemes for Resilient Mobile Computing)

  • 정의종;김재훈
    • 한국정보과학회:학술대회논문집
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    • 한국정보과학회 2000년도 가을 학술발표논문집 Vol.27 No.2 (3)
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    • pp.505-507
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    • 2000
  • 이동 컴퓨팅에서 사용되는 단말기는 배터리의 제약과 이동통신망의 높은 장애율로 사용에 불편을 느낀다. 여러 mobile client는 공통 관심이 있는 데이터를 서버로부터 받는 방법으로 broadcasting을 많이 쓰는데, 이때 indexing 기법을 이용해 클라이언트는 원하는 데이터를 filtering해서 수신함으로서 에너지의 효율적 사용을 기할 수 있다. index를 중복시킴으로써 원하는 데이터 접근(access) 시간을 줄이고 무선 통신망의 장애에 따른 성능저하를 줄일 수 있다. 본 논문에서는 K-level indexing 기법을 위한 장애율에 따른 최적의 중복회수를 구하고 데이터 수신시 데이터 시간과 튜닝(tuning)시간을 구한다.

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모바일 데이터 브로드캐스팅을 위한 트리 기반의 인덱싱 방법 (A Tree-Based Indexing Method for Mobile Data Broadcasting)

  • 박미화;이용규
    • 한국컴퓨터정보학회논문지
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    • 제13권4호
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    • pp.141-150
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    • 2008
  • 무선 모바일 환경에서 통신 장비의 에너지와 전송 대역폭 효율을 위해 방송 기법이 널리 사용되고 있다. 기존에는 비계층적 데이터를 대상으로 한 인덱싱 연구들이 있었으나, 웹과 이동통신 환경에서 널리 사용되는 XML 데이터에 대한 방송 인덱싱 연구는 미미한 실정이다. 본 연구에서는 XML문서에 대한 새로운 방송 인덱싱 방법으로 TOP 트리를 제안한다. TOP 트리는 XML 문서에 포함된 엘리먼트들을 같은 경로를 갖는 엘리먼트 그룹으로 분류한 후, 해당 그룹을 순서화된 고유 ID가 부여된 노드로 구성하고 엘리먼트 그룹간의 관계를 간선으로 연결한 경로 요약 트리이다. 본 논문에서는 TOP 트리 기반 방송 스트림 생성 방법과다중 경로 질의 처리 방법을 제안하고 실험을 통해 제안 방법의 우수성을 입증한다.

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Speaker Tracking Using Eigendecomposition and an Index Tree of Reference Models

  • Moattar, Mohammad Hossein;Homayounpour, Mohammad Mehdi
    • ETRI Journal
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    • 제33권5호
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    • pp.741-751
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    • 2011
  • This paper focuses on online speaker tracking for telephone conversations and broadcast news. Since the online applicability imposes some limitations on the tracking strategy, such as data insufficiency, a reliable approach should be applied to compensate for this shortage. In this framework, a set of reference speaker models are used as side information to facilitate online tracking. To improve the indexing accuracy, adaptation approaches in eigenvoice decomposition space are proposed in this paper. We believe that the eigenvoice adaptation techniques would help to embed the speaker space in the models and hence enrich the generality of the selected speaker models. Also, an index structure of the reference models is proposed to speed up the search in the model space. The proposed framework is evaluated on 2002 Rich Transcription Broadcast News and Conversational Telephone Speech corpus as well as a synthetic dataset. The indexing errors of the proposed framework on telephone conversations, broadcast news, and synthetic dataset are 8.77%, 9.36%, and 12.4%, respectively. Using the index tree structure approach, the run time of the proposed framework is improved by 22%.

A Novel Air Indexing Scheme for Window Query in Non-Flat Wireless Spatial Data Broadcast

  • Im, Seok-Jin;Youn, Hee-Yong;Choi, Jin-Tak;Ouyang, Jinsong
    • Journal of Communications and Networks
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    • 제13권4호
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    • pp.400-407
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    • 2011
  • Various air indexing and data scheduling schemes for wireless broadcast of spatial data have been developed for energy efficient query processing. The existing schemes are not effective when the clients' data access patterns are skewed to some items. It is because the schemes are based on flat broadcast that does not take the popularity of the data items into consideration. In this paper, thus, we propose a data scheduling scheme letting the popular items appear more frequently on the channel, and grid-based distributed index for non-flat broadcast (GDIN) for window query processing. The proposed GDIN allows quick and energy efficient processing of window query, matching the clients' linear channel access pattern and letting the clients access only the queried data items. The simulation results show that the proposed GDIN significantly outperforms the existing schemes in terms of access time, tuning time, and energy efficiency.

XML 기반 CCR 문서의 무선 데이터 방송을 위한 프레임워크의 설계와 구현 (Design and Development of Framework for Wireless Data Broadcast of XML-based CCR Documents)

  • 임석진;황희정
    • 한국인터넷방송통신학회논문지
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    • 제15권5호
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    • pp.169-175
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    • 2015
  • ICT 기술과 의료기술이 융합된 의료 정보기술에서 XML 기반의 CCR 문서는 환자 데이터의 연속성과 이동성을 확보해 준다. 대규모의 클라이언트들이 CCR 문서를 동시에 액세스할 때 클라이언트의 수에 상관없이 데이터 배표가 가능하게 해주는 확장성을 가진 무선 데이터 방송은 효율적인 정보 전달을 위한 하나의 대안이 된다. 본 논문은 무선데이터방송을 이용한 CCR 문서 전달을 위해 다양한 CCR 문서 스케줄링 기법과 인덱스 기법을 적용하여 최적의 클라이언트 성능을 낼 수 있도록 방송환경을 구축할 수 있는 무선 데이터 방송 시뮬레이션 프레임워크를 설계하고 구현한다. 구현된 프레임워크에 다양한 스케줄링 기법과 인덱스를 적용한 시뮬레이션을 통해 제안된 프레임워크의 효율성을 보였다.

무선통신 장애를 고려한 indexing broadcast 기법의 성능분석 (Analysis and Measurement of Data Broadcast Schemes on Error Prone Wireless Link for Resilient Mobile Computing)

  • 정의종;김재훈
    • 한국정보과학회:학술대회논문집
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    • 한국정보과학회 2000년도 봄 학술발표논문집 Vol.27 No.1 (A)
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    • pp.262-264
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    • 2000
  • 현재의 이동 컴퓨팅 환경은 더욱 보편화되고 있다. 그러나 베터리의 제약과 이동통신망의 높은 장애율로 사용에 불편을 느낀다. 여러 mobile client는 공통 관심이 있는 데이터를 서버로부터 받는 방법으로 broadcasting을 많이 쓰는데, 이때 indexing 기법을 이용해 클라이언트는 원하는 데이터를 filtering 해서 수신함으로서 에너지의 효율적 사용을 기할 수 있다. index를 중복시킴으로서 원하는 데이터의 access 시간을 줄이고 무선 통신망의 장애에 따른 성능 저하를 줄일 수 있다. 본 논문에서는 장애율에 따른 최적의 중복회수를 구하고 데이터 수신시 access 시간과 tuning 시간을 구한다.

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An Efficient Adaptive Bitmap-based Selective Tuning Scheme for Spatial Queries in Broadcast Environments

  • Song, Doo-Hee;Park, Kwang-Jin
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제5권10호
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    • pp.1862-1878
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    • 2011
  • With the advances in wireless communication technology and the advent of smartphones, research on location-based services (LBSs) is being actively carried out. In particular, several spatial index methods have been proposed to provide efficient LBSs. However, finding an optimal indexing method that balances query performance and index size remains a challenge in the case of wireless environments that have limited channel bandwidths and device resources (computational power, memory, and battery power). Thus, mechanisms that make existing spatial indexing techniques more efficient and highly applicable in resource-limited environments should be studied. Bitmap-based Spatial Indexing (BSI) has been designed to support LBSs, especially in wireless broadcast environments. However, the access latency in BSI is extremely large because of the large size of the bitmap, and this may lead to increases in the search time. In this paper, we introduce a Selective Bitmap-based Spatial Indexing (SBSI) technique. Then, we propose an Adaptive Bitmap-based Spatial Indexing (ABSI) to improve the tuning time in the proposed SBSI scheme. The ABSI is applied to the distribution of geographical objects in a grid by using the Hilbert curve (HC). With the information in the ABSI, grid cells that have no objects placed, (i.e., 0-bit information in the spatial bitmap index) are not tuned during a search. This leads to an improvement in the tuning time on the client side. We have carried out a performance evaluation and demonstrated that our SBSI and ABSI techniques outperform the existing bitmap-based DSI (B DSI) technique.

Object segmentation and object-based surveillance video indexing

  • Kim, Jin-Woong;Kim, Mun-Churl;Lee, Kyu-Won;Kim, Jae-Gon;Ahn, Chie-Teuk
    • 한국방송∙미디어공학회:학술대회논문집
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    • 한국방송공학회 1999년도 KOBA 방송기술 워크샵 KOBA Broadcasting Technology Workshop
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    • pp.165.1-170
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    • 1999
  • Object segmentation fro natural video scenes has recently become one of very active research to pics due to the object-based video coding standard MPEG-4. Object detection and isolation is also useful for object-based indexing and search of video content, which is a goal of the emerging new standard, MPEG-7. In this paper, an automatic segmentation method of moving objects in image sequence is presented which is applicable to multimedia content authoring for MPEG-4, and two different segmentation approaches suitable for surveillance applications are addressed in raw data domain and compressed bitstream domains. We also propose an object-based video description scheme based on object segmentation for video indexing purposes.