• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2009년도 학술대회
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• pp.538-541
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• 2009

본 논문에서는 촉각기반 비디오 및 오디오 스트리밍 기술 개발을 설명한다. 제안하는 스트리밍 기술은 촉각정보를 포함한 비디오 프레임과 함께 진동정보를 가진 오디오를 실시간으로 전송해주는 방법에 대한 구현을 설명한다. 촉각정보 전송을 위하여 비디오 화면을 일정한 크기의 셀로 나누어 각 셀에 비디오 화면의 콘텐츠에 대응하는 촉각정보를 적용시켜 주었다. 이 정보들은 특정 형식으로 파일로 저장되게 되고 촉각정보 전송에 사용되게 된다. 촉각정보 전송은 비디오 프레임과 교차하며 전송된다. 이렇게 전송된 비디오와 촉각정보는 클라이언트 컴퓨터에서 병렬적으로 처리되어 화면에 출력시켜준다. 진동정보를 가진 오디오를 전송하기 위해서는 사운드를 분석하여 특정 사운드에 적합한 진동을 적용시켜 주었다. 이런 방법으로 저장된 진동정보는 사운드 스트리밍과 동기화되어 사용자에게 전송되며 이를 통해 사용자는 관람하고 있는 비디오 화면을 만짐으로써 화면 콘텐츠의 재질을 느낄 수 있고 음향에 따라 다양한 패턴의 진동을 느낄 수 있다.

• 한국콘텐츠학회논문지
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• 제17권11호
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• pp.312-318
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• 2017

최근 고화질 영상 입력장치가 일반화 되고 있으며, 실시간으로 입력된 영상을 한 곳에서 동시에 볼 수 있는 중앙관제시스템이 필수 요소가 되고 있다. 이때 프로그램을 따로 설치하지 않고, 웹을 통한 접근을 하려는 시도들이 있으나, 여러 개의 고화질 영상을 동시에 웹 브라우저를 통해 시청하려하면, 웹 브라우저가 강제 종료되는 현상이 발생된다. 본 논문에서는 실시간 고화질 영상에 대한 웹기반의 HLS 멀티뷰 시스템을 제안한다. 화면으로 보이는 멀티뷰 화면을 트랜스코딩을 통해서 재구성하였고, 보안의 취약점이 있는 ActiveX를 사용하지 않으면서도, 통시에 웹브라우저를 통해서 여러 영상 입력을 모니터링 할 수 있는 시스템을 구현 하였다.

• 인터넷정보학회논문지
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• 제18권1호
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• pp.37-41
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• 2017

본 논문에서는 PPL(Product Placement)을 변경할 수 있는 위치기반 실시간 비디오 클립을 스트리밍하는 스마트 플랫폼을 제안한다. 제안하는 플랫폼은 LTE 위치인식 기반의 GPS 좌표 값과 비콘 기술을 활용하여 Active Push형태로 사용자에게 촬영지의 드라마 영상을 제공한다. 또한 비디오 클립 내의 PPL 객체에 대한 사진, 동영상, 음악, URI(Uniform Resource Identifier) 형태의 DB를 구성하였다. 제안한 플랫폼에서는 비디오 클립 스트리밍 서비스 상황에서 PPL 객체 DB에 대한 인터액티브 태그 동기화를 통해 PPL 객체의 색깔과 모양을 변경할 수 있도록 하였다. 제안하는 플랫폼에서는 서비스 제공자의 요구에 따라 PPL 변경이 가능한 위치 기반 실시간 비디오 스트리밍을 가능하게 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권8호
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• pp.3025-3047
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• 2021

This paper presents the latest Ethernet standardization of in-vehicle network and the future trends of automotive Ethernet technology. The proposed system provides design and optimization algorithms for automotive networking technology related to AVB (Audio Video Bridge) technology. We present a design of in-vehicle network system as well as the optimization of AVB for automotive. A proposal of Reduced Latency of Machine to Machine (RLMM) plays an outstanding role in reducing the latency among devices. RLMM's approach to real-world experimental cases indicates a reduction in latency of around 41.2%. The setup optimized for the automotive network environment is expected to significantly reduce the time in the development and design process. The results obtained in the study of image transmission latency are trustworthy because average values were collected over a long period of time. It is necessary to analyze a latency between multimedia devices within limited time which will be of considerable benefit to the industry. Furthermore, the proposed reliable camera and video streaming through optimized AVB device settings would provide a high level of support in the real-time comprehension and analysis of images with AI (Artificial Intelligence) algorithms in autonomous driving.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권6호
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• pp.1209-1221
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• 2010

Three dimensional (3D) video is expected to be an important application for broadcast and IP streaming services. One of the main limitations for the transmission of 3D video over IP networks is network bandwidth mismatch due to the large size of 3D data, which causes fatal decoding errors and mosaic-like damage. This paper presents a novel selective frame discard method to address the problem. The main idea of the proposed method is the symmetrical discard of the two dimensional (2D) video frame and the depth map frame. Also, the frames to be discarded are selected after additional consideration of the playback deadline, the network bandwidth, and the inter-frame dependency relationship within a group of pictures (GOP). It enables the efficient utilization of the network bandwidth and high quality 3D IPTV service. The simulation results demonstrate that the proposed method enhances the media quality of 3D video streaming even in the case of bad network conditions.

• Educational Technology International
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• 제14권1호
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• pp.1-26
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• 2013

This study is to identify whether three types of online instruction (text-based, video-based, and video-based instruction without text) and age category have a different influence on students' comprehension and motivation. Online students were randomly assigned to one of six groups, and they attended two-week online lectures via Course Management System. The comprehension test and the short form of IMMS were implemented when 114 participants accomplished two-week online lectures. The results revealed that using instructional video in online instruction is more effective instructional medium than text only in order to promote learner's motivation. Besides, older adults aged 41-60 are significantly different from younger adults (21-40 years old) in terms of students' comprehension. Furthermore, three types of online instructions are likely to be influenced by age category.

• 디지털산업정보학회논문지
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• 제13권4호
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• pp.213-219
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• 2017

Streaming server is that an image produced in real time or a file form of image produced ahead consists of SNS service, and the relay module of streaming server includes output management module that set an output channel more than 2 and control transmission of video content. This thesis intends to suggest how to stream through plural output channel that contains output channel of external streaming server using relay module and do streaming provided to terminal receiving image, and streaming server, streaming system for this. Thus, by extending output channel sending out image to output channel of external streaming server, the scale of streaming server is not limited and the process allotting external streaming server into output channel sending the image becomes simple, so management of output channel becomes efficient even when sending several images.

• 전기학회논문지P
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• 제63권3호
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• pp.206-211
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• 2014

In this Paper, We proposed the HLS(Http Live Streaming) transmitter which is operated easily and cheap in all networks and client environments compared to the exist video live streaming transmitter. We analyzed the HLS protocol and then implemented for making the HLS transmitter cheaper and portable. After designing the HLS transmitter hardware using the RISC processor of Arm11 core, we ported the Linux Operating System and implemented the HLS protocol using the open source FFmpeg and Segmenter. For the performance evaluation of the developed HLS transmitter, we made the testing environment which is including the notebook, iPhone, and aroid Phone. In this testing environment, we analysed the received video data at the client displayer. As a results of the performance evaluation, we could certify that the proposed HLS transmitter has a higher performance than the Apple company's HLS.

• ETRI Journal
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• 제35권6호
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• pp.960-968
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• 2013

To implement a cloud game service platform supporting multiple users and devices based on real-time streaming, there are many technical needs, including game screen and sound capturing, audio/video encoding in real time created by a high-performance server-generated game screen, and real-time streaming to client devices, such as low-cost PCs, smart devices, and set-top boxes. We therefore present a game service platform for the running and management of the game screen, as well as running the sound on the server, in which the captured and encoded game screen and sound separately provide client devices through real-time streaming. The proposed platform offers Web-based services that allow game play on smaller end devices without requiring the games to be installed locally.

• International Journal of Advanced Culture Technology
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• 제12권2호
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• pp.30-35
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• 2024

With the recent commercialization of the 5th generation mobile communication technology (5G), interest is focused on full-fledged wireless communication service products in related industries that apply the technology. In this paper, "the problems of the cloud-based video game streaming service market, which has been stagnant for a long time due to the existing 4G-based transmission delay, processing delay, and price issues, and the problems of 5G mobile communication, which began commercialization in 2019." We contains information about what type of positive changes a cloud-based video game streaming service incorporating technology will bring.