Journal of the Korea Society of Computer and Information (한국컴퓨터정보학회논문지)

Korean Society of Computer Information (한국컴퓨터정보학회)
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A Study on the Design of Uniform Quality Guaranteed Streaming Video System

균일 화질 보장을 위한 스트리밍 비디오 시스템 설계에 관한 연구

  • Park, Young-Hwan (Dept. of Computer & Information Engineering, Chongju University) ;
  • Park, Chan-Khon (Dept. of Computer & Information Engineering, Chongju University)
  • 박영환 (청주대학교 컴퓨터정보공학과) ;
  • 박찬곤 (청주대학교 컴퓨터정보공학과)
  • Received : 2013.06.04
  • Accepted : 2013.08.06
  • Published : 2013.08.30
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Abstract

The existing research on the QoS of the Streaming video system(SVS) adjust the video stream being sent from the network perspective, the focus is to prevent data loss and delay. The other hand, changing the quality of the video stream will not receive the guaranteed QoS from the perspective of the users who want uniform quality. In order to solve these problems, this paper applied to ensure that the benefits in the amount of bits per frame occurs Encoder CBR streaming video is kept constant and uniform picture quality advantages of VBR streaming video VBR to CBR Encoder and CBR to VBR Decoder, Video was designed to control the playback stream for And to ensure a uniform quality of the user based on the design and implementation of uniform quality guaranteed SVS. PSNR evaluated for several characteristics of the sample video to demonstrate the superiority of the SVS ensure uniform quality, the proposed Performance evaluation of the SVS ensure uniform quality CBW the ABR from 100% to ensure uniform image quality from 85% to environmental excellence is proved.

스트리밍 비디오 시스템(SVS)의 QoS에 관한 기존 연구는 네트워크 관점에서 전송되는 비디오 스트림을 조절하여 데이터의 손실과 지연을 방지하는데 중점을 두고 있다. 반면 비디오 스트림의 화질이 변화되면 균일화질을 원하는 사용자 입장에서의 QoS는 보장 받지 못하는 것이다. 이러한 문제를 해결하기 위하여 본 논문에서는 Encoder에서 프레임 당 발생 비트량이 일정하게 유지되는 CBR 스트리밍 비디오의 장점과 균일한 화질을 보장하는 VBR 스트리밍 비디오의 장점을 적용한 VBR to CBR Encoder와 CBR to VBR Decoder, 비디오 스트림에 대한 재생 제어를 설계하였다. 그리고 이를 기반으로 사용자에게 균일한 화질의 제공을 보장하는 균일 화질 보장 SVS를 설계하고 구현하였다. 본 논문에서 제안한 균일 화질 보장 SVS의 우수성을 입증하기 위하여 여러 특성의 샘플 비디오에 대한 PSNR을 평가하였다. 평가결과 균일 화질 보장 SVS의 성능이 CBW가 ABR 100%부터 85%까지의 환경에서 균일한 화질을 보장하여 우수성을 입증하였다.

Keywords

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