• Title/Summary/Keyword: video program

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Selective Quality Control of Multiple Video Programs for Digital Broadcasting Service (디지털 방송 서비스를 위한 다수의 비디오 프로그램들의 선택적 화질 제어)

  • 홍성훈;유상조
    • Journal of Broadcast Engineering
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    • v.6 no.2
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    • pp.148-159
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    • 2001
  • This paper presents a selective duality control system to control relative picture quality among the video programs in terms of Peak Signal-to-Noise Ratio (PSNR) . The selective quality control system allows variable bit rate (VBR) for each video program to maintain the pre-determitted relative picture Quality among aggregated video programs while keeping a constant bit rate for alt programs to be transmitted over a single constant bit rate (CBR) channel. Thus is achieved by simultaneous controlling the video encoders to generate VBR video streams at the central controller. furthermore, we also suggest a buffer regulation method based on the analysis of the constraints Imposed by sender/receiver buffer sizes and the total transmission rate. Through various simulation results, it is found that the proposed quality control system guarantees that the video buffers neither overflow nor underflow and the quality control errors do not exceed 0.1 dB.

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Video Abstracting Using Scene Change Detection and Shot Clustering for Construction of Efficient Video Database (대용량 비디오 데이터베이스 구축을 위하여 장면전환 검출과 샷 클러스터링을 이용한 비디오 개요 추출)

  • Shin Seong-Yoon;Pyo Seong-Bae
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.2 s.40
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    • pp.111-119
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    • 2006
  • Video viewers can not understand enough entire video contents because most video is long length data of large capacity. This paper propose efficient scene change detection and video abstracting using new shot clustering to solve this problem. Scene change detection is extracted by method that was merged color histogram with $\chi2$ histogram. Clustering is performed by similarity measure using difference of local histogram and new shot merge algorithm. Furthermore, experimental result is represented by using Real TV broadcast program.

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Development of a Smoking Prevention Video for Youth (흡연예방을 위한 청소년 교육방향 -교육용 비디오 효과분석율 중심으로-)

  • 최은진
    • Korean Journal of Health Education and Promotion
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    • v.17 no.2
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    • pp.75-85
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    • 2000
  • The National Health Promotion Law passed in 1995 was a milestone for initiating a national health promotion program in Korea, and local governments and health related organizations are developing and providing health promotion programs for the public. The purpose of this study was to explore the effectiveness of a smoking prevention video for adolescents. There was no educational video on smoking prevention for school students in Korea. Based on funding from the National Health Promotion Fund, an educational video on smoking prevention has been developed and tested for the effectiveness. The primary subject of the video was middle school students. The result of the study has shown that there was a statistically significant difference between pre-and post test among middle school students and elementary school students. Students' knowledge on the harm of smoking has been increased after the video education. In addition, more than half of the students responded that the educational video was interesting and helpful. To reduce initiation of smoking among adolescents, both policies and school health education programs should be reinforced. Policies on tobacco should focus on demand of smokers and potential smokers. So government officials should keep monitor obedience of the law on prohibition of smoking for those under age 19. School teachers should focus on social influence of smoking for adolescents.

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Video Abstracting Construction of Efficient Video Database (대용량 비디오 데이터베이스 구축을 위한 비디오 개요 추출)

  • Shin Seong-Yoon;Pyo Seong-Bae;Rhee Yang-Won
    • KSCI Review
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    • v.14 no.1
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    • pp.255-264
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    • 2006
  • Video viewers can not understand enough entire video contents because most video is long length data of large capacity. This paper propose efficient scene change detection and video abstracting using new shot clustering to solve this problem. Scene change detection is extracted by method that was merged color histogram with ${\chi}^2$ histogram. Clustering is performed by similarity measure using difference of local histogram and new shot merge algorithm. Furthermore, experimental result is represented by using Real TV broadcast program.

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The Effects of Supportive Nursing Intervention Using Video-Program of Operating Room Nurses before Operation on Laparoscopic Hysterectomy Patient's Anxiety (수술 전 수술실간호사의 동영상 프로그램을 활용한 지지간호중재가 자궁적출술 환자의 불안에 미치는 효과)

  • Eo, Yong-Sook;Lee, Nae-Young;Lee, Ji-Won;Cha, Hyeon-Jun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.4
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    • pp.2639-2646
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    • 2015
  • This study was to identify the effects of supportive nursing intervention using video-program of operating room nurses before operation on laparoscopic hysterectomy patient's anxiety. This study was nonequivalent control group pre-post test design. The data were collected from May 1 to Jun 20, 2013 and analyzed by $x^2-test$, Fisher's exact test and t-test using SPSS 20.0 program. Experimental group(who received supportive nursing intervention) and control group(who received booklet education) was respectively consisted of 25 patients who were laparoscopy hysterectomy. The anxiety(p=.002) of experimental group was significantly lower than control group. The systolic(p=.012) and diastolic(p=.045) pressure of experimental group was significantly lower than control group, but pulse wasn't. The supportive nursing intervention for preoperative patient is considered effective and useful in reducing anxiety. Further research is warranted to investigate the supportive nursing intervention long-term effect.

Effectiveness of Education Program Using Video Recording and Feedback on Skill Competency for Students of Majors in Health Care: A Meta-Analysis (동영상 촬영과 피드백을 이용한 실습교육이 보건의료전공 대학생의 술기수행능력에 미치는 효과: 메타분석)

  • Shin, Yun Hee;Kim, Sun Kyung;Kim, Hyunjoo
    • Journal of Korean Academy of Fundamentals of Nursing
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    • v.25 no.2
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    • pp.120-133
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    • 2018
  • Purpose: A meta-analysis was conducted to evaluate effectiveness of education programs using video recording and feedback in the improvement of competency in clinical skills for health care majors. Methods: Six databases were searched and inclusion criteria were randomized controlled trials (RCTs) or non-randomized controlled trials (NRTs) reporting level of skill competency using numerical measurements. Data analysis and synthesis were performed using Comprehensive Meta-Analysis software and Revman program. Results: Of 1,568 records, 11 studies met inclusion criteria. Statistically significant effectiveness of education programs using video recording and feedback was identified. A low risk of bias was detected among both RCTs and NRTs. Meta-analysis showed that the intervention groups had more effective improvements in skill competency (standardized mean difference [SMD]: 0.74; 95% CI: 0.33~1.16). Results of subgroup analysis showed higher effects when interventions dealt with one skill, used self-reflection with expert feedback, and included instruction from instructor in the education programs. Conclusion: Findings suggest that schools for health care majors should actively adopt video and feedback based skill training allowing educators to design effective programs. Potential is higher for students to achieve higher competency when they train with one skill at a time, use of instruction and receive feedback from experts.

A Viewer Preference Model Based on Physiological Feedback (CogTV를 위한 생체신호기반 시청자 선호도 모델)

  • Park, Tae-Suh;Kim, Byoung-Hee;Zhang, Byoung-Tak
    • Journal of the Korean Institute of Intelligent Systems
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    • v.24 no.3
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    • pp.316-322
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    • 2014
  • A movie recommendation system is proposed to learn a preference model of a viewer by using multimodal features of a video content and their evoked implicit responses of the viewer in synchronized manner. In this system, facial expression, body posture, and physiological signals are measured to estimate the affective states of the viewer, in accordance with the stimuli consisting of low-level and affective features from video, audio, and text streams. Experimental results show that it is possible to predict arousal response, which is measured by electrodermal activity, of a viewer from auditory and text features in a video stimuli, for estimating interestingness on the video.

DTV Lip-Sync Test Using Embedded Audio-Video Time Indexed Signals (숨겨진 오디오 비디오 시간 인덱스 신호를 사용한 DTV 립싱크 테스트)

  • 한찬호;송규익
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.41 no.3
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    • pp.155-162
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    • 2004
  • This paper concentrated on lip synchronization (lip sync) test for DTV with respect to audio and video signals using a finite digital bitstream In this paper, we propose a new lip sync test method which does not effect on the current program by use of the transient effect area test signals (TATS) and audio-video time index lip sync test signals (TILS).the experimental result shows that the time difference between audio and video signal can be easily measured by captured oscilloscope waveform at any time.

Storage Allocation in Multi-level VOD Network Using Dynamic Programming (동적계획법을 이용한 다계층 VOD 망의 저장량 결정)

  • Kim, Yeo-Keun;Cho, Myoung-Rai;Kim, Jae-Yun
    • IE interfaces
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    • v.9 no.3
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    • pp.202-213
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    • 1996
  • Video-on-demand is an interactive service that provides programs (movie, home shopping, etc.) to users connected to a network. This service will require high bandwidth network and video servers with a large amount of storage capacity. From the viewpoint of system analysis, there are optimization problems to be solved. In this paper, we present a dynamic programming method for allocating the storage for programs being served in a multi-level video-on-demand network. In the optimization of the network resource, we consider the three kinds of costs: installation cost for video servers, program storage cost, and transmission (or communication) cost. The factors related to the costs are investigated. An example is shown to illustrate the proposed method.

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