• Title/Summary/Keyword: Program Map Table

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Implementation of Play and Copy Control of DMB contents using Watermarking and Encryption on PMP (워터마킹과 암호화를 이용한 DMB 콘텐츠의 재생 및 복사 제어를 PMP에 구현)

  • Jeong, Yong-Jae;Moon, Kwang-Seok;Kim, Jong-Nam
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.46 no.2
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    • pp.52-57
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    • 2009
  • Recently, the regular service of a terrestrial digital multimedia broadcasting(T-DMB) made faster distribution of T-DMB receiver. The problem of an illegal distribution is increasing owing to a large distribution of T-DMB receiver. In this paper, we propose a watermarking and encryption method on T-DMB bit-stream for a copy and Play control to prevent an illegal distribution of T-DMB contents. We implement our proposed method on a portable multimedia player (PMP) which has T-DMB receiver. The proposed method insert the encrypted information for control of copy and play after finding padding area of program map table (PMT) and program association table (PAT) from analysis of transport stream (TS) of T-DMB. In implementation result, we can control use of contents according to information of copy and play control. The proposed method can be used to content Protection software for blocking of an illegal distribution of T-DMB contents on a mobile T-DMB receivers.

Synchronization Issues for Stereoscopic High-Definition Video Delivery over IP Networks (고화질 스테레오 비디오 전송 시스템을 위한 동기화 기법)

  • Kim, Jong-Ryool;Lee, Seok-Hee;Kim, Jong-Won
    • 한국HCI학회:학술대회논문집
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    • 2006.02a
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    • pp.1373-1378
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    • 2006
  • 대용량의 네트워크 인프라가 확대되고, 네트워크를 통한 DV, HD 급의 고화질 비디오 전송이 보편화 되면서, 고화질의 비디오에 몰입감, 현실감을 증진시키기 위한 스테레오 HD 비디오 전송이 가능하게 되었다. 본 논문은 IP 네트워크를 통해서 스테레오 HD 비디오 전송을 가능하게 해주는 소프트웨어 기반의 HD 비디오 전송 시스템에서 효과적으로 몰입감과 입체감을 제공하기 위해 충족되어야 하는 좌우 영상의 동기화에 필요한 요소들을 다룬다. 제안된 동기화 기법은 수신 측에서 최종적으로 동기화된 좌우 영상을 통해 스테레오 HD 비디오를 얻기 위해서 좌우 카메라로부터 영상의 획득 시, 획득된 영상의 네트워크 전송 시, 또 수신된 영상의 재생 시 좌우 영상의 동기화한다. 결과적으로 동기화 된 좌우 영상을 통하여 몰입감과 현실감을 가지는 스트레오 HD 비디오를 실시간으로 감상할 수 있다.

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TotalStation and System2000 Implementation for Digital Cartographic Map (토탈스테이션과 시스템2000을 이용한 수치지형도 제작)

  • Yang, Ok-Jin;Jung, Young-Dong;Kang, Sang-Gu
    • Journal of Korean Society for Geospatial Information Science
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    • v.9 no.2 s.18
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    • pp.55-62
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    • 2001
  • The development of electronic technology brings the advent of GPS and electronic total station which measures, stores and records automatically angles, distances and 3d coordinates Electronic totalstation is the surveying equipment and system2000 is the supporting program that enables totals tation to get 3d terrain information, construction of the database and automatic drafting of the cartographic map. In this study, we aims at studying the system which can produce automatically the digital cartographic map by using total station and system2000. For this study, cartographic maps of a region are produced by total station and system2000, and then builded digital cartographic map on the autocad2000 environment and also we analysed two digital cartographic maps. As a results of this study, it is found that digital cartographic map by total station and system2000 are much more accurate and efficient than cartographic map by electronic plan table surveying.

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Realtime Generation of Grid Map for Autonomous Navigation Using the Digitalized Geographic Information (디지털지형정보 기반의 실시간 자율주행 격자지도 생성 연구)

  • Lee, Ho-Joo;Lee, Young-Il;Park, Yong-Woon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.14 no.4
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    • pp.539-547
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    • 2011
  • In this paper, a method of generating path planning map is developed using digitalized geographic information such as FDB(Feature DataBase). FDB is widely used by the Army and needs to be applied to all weapon systems of newly developed. For the autonomous navigation of a robot, it is necessary to generate a path planning map by which a global path can be optimized. First, data included in FDB is analyzed in order to identify meaningful layers and attributes of which information can be used to generate the path planning map. Then for each of meaningful layers identified, a set of values of attributes in the layer is converted into the traverse cost using a matching table in which any combination of attribute values are matched into the corresponding traverse cost. For a certain region that is gridded, i.e., represented by a grid map, the traverse cost is extracted in a automatic manner for each gird of the region to generate the path planning map. Since multiple layers may be included in a single grid, an algorithm is developed to fusion several traverse costs. The proposed method is tested using a experimental program. Test results show that it can be a viable tool for generating the path planning map in real-time. The method can be used to generate other kinds of path planning maps using the digitalized geographic information as well.

Combination of Set Top Box and Asymmetric Cryptosystem for Secure Storage of Digital Broadcasting Contents (디지털 방송 콘텐츠의 안전한 저장을 위한 Set Top Box와 비대칭 암호 시스템의 결합)

  • 이혜주;최형기;홍진우
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2003.05a
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    • pp.782-786
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    • 2003
  • It requires protection technologies to permit consumer to store a digital broadcasting content and at the same time to protect the intellectual property from illegal action. There is content encryption as one of protection technologies. In this paper, we proposed a protection scheme for digital broadcasting content that broadcasting server. Multiplexes the encryption key into MPEG-2 TS(transport stream) to be able to encrypt received TS at set top box. The proposed method is to modify PMT(program map table) for the information related encryption key and to multiplex key as TS packets. After then the encryption key is extracted from TS stream which is encrypted in set top box.

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The Development of Data Base Program on the Catch of Long-Iine Tuna (원양 다랭이 연승어업의 어획량 데이터 베이스 프로그램 개발)

  • 배봉성
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.32 no.4
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    • pp.356-362
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    • 1996
  • In order to suggest the useful information of fishing ground, a data base system on 32bit personal computer was developed and handled by using the catch data of Korean tuna long -line. This data base system was programmed using Quick Basic, and consisted of three kinds of programs, one for displaying the catch rate on the fishing ground by fishing area and year ranges, another for indicating the catch rate or number on table or graph, and the other for estimating the fishing ground in economical points, mainly targeting total tunas, yellowfin and bigeye tuna respectively. When this system was started, the map of oceans such as the Pacific, the Indian and the Atlantic, is drawn on the monitor. And then the catch rates of all species and each one are indicated by the figured symbols on the sea divisions of$5^{\circ}$ space of latitute and longitude.

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Comparison of Traffic Crash Characteristics Using Spatio-temporal Analysis in GIS-T (GIS-T 환경에서 시공간분석을 이용한 교통사고 특성 비교 - 도로 폐쇄 전후비교를 중심으로-)

  • Kim, Ho-Yong;Baik, Ho-Jong;Kim, Ji-Sook
    • Journal of the Korean Association of Geographic Information Studies
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    • v.13 no.2
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    • pp.41-53
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    • 2010
  • Traffic safety assessment is often accomplished by analyzing the number of crashes occurring in some geographic space over certain specific time duration. In this paper, we introduce a procedure that can efficiently analyze spatial and temporal changes in traffic crashes before-and-after implementation of a certain traffic controlling measure. For the analysis, crash frequency data before-and-after closing a major highway around St. Louis in Missouri was collected through Transportation Management System(TMS) database that is maintained by Missouri Department of Transportation (MoDOT). In order to identify any spatial and temporal pattern in crashes, each crash is pinpointed on a map using the dynamic segmentation in GIS. Then, the identified pattern is statistically confirmed using an analysis of variance table. The advantage of this approach is to easily assess spatial and temporal trend of crashes that are not readily attainable otherwise. The results from this study can possibly be applied in enhancing the highway safety assessment procedure. This paper also makes several suggestions for future development of a comprehensive transportation data system in Korea which is similar to MoDOT's TMS database.

Precision Evaluation of Scanning the Digital Dental Abutment Impression and Dental Gypsum Model according to 3-dimensional Superimposing Different Skills (3차원 중첩 기술 차이에 따른 디지털 치과용 지대치 인상체 및 경석고 모형의 스캐닝 정밀도 평가)

  • Jeon, Jin-Hun
    • The Journal of the Korea Contents Association
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    • v.18 no.12
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    • pp.639-645
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    • 2018
  • The objective of this research was to compare the precision of scanning the digital abutment impression and gypsum model according to 3-dimensional superimposing different skills. There were made with the abutment impression and gypsum model of a maxillary 1st premolar, blue light scanner scanned to obtain the stereolithography (STL) file. After the same process was performed 10 more times without moving them on the scanner table about the abutment impression and gypsum model, respectively (n=11, per types). By superimposing the date of scanning the abutment impression and gypsum model used with no control and best-fit-alignment skills, 10 color-difference maps and root mean square (RMS) data were obtained. The independent t-test was performed to compare RMS data between the each other groups (${\alpha}=0.05$). In the scanning abutment impressions, $RMS{\pm}SD$ of no control, best-fit-alignment showed $6.86{\pm}0.94$, $5.04{\pm}0.24$. in the scanning gypsum model, $4.98{\pm}1.16$, $3.39{\pm}0.07$, all groups showed a significant difference (P<0.001). Trough the this study's result, not only best-fit-alignment but no control is used with digital dental computer-aided design/computer-aided manufacturing (CAD/CAM) research and clinical part.