와이맥스 망에서 FGS 코딩 기반의 모바일 IPTV 전송 시스템

FGS Coding-based Mobile IPTV Transmission System over WiMAX Network

  • 주현철 (포항공과대학교 컴퓨터공학과 멀티미디어 통신/네트워킹 연구실) ;
  • 송황준 (포항공과대학교 컴퓨터공학과 멀티미디어 통신/네트워킹 연구실)
  • 발행 : 2009.08.31

초록

본 논문은 와이맥스 망에서 FGS 기법을 통해 인코딩된 영상을 효율적으로 전송하기 위한 모바일 IPTV 시스템을 제안한다. 제안하는 시스템은 한정된 무선 자원 내에서, 가능한 많은 사용자에게 고화질의 영상 서비스 제공을 목적으로 한다. 이를 위해 기지국은 셀 내에 향상 계층을 제공받는 사용자의 수와 그들의 영상 화질사이의 상관관계를 고려하여, 사용자들의 링크 상태를 기반으로 향상 계층에 대한 물리 계층상의 변조 기법 및 부호화율을 결정하고 향상 계층의 일부 비트스트림만을 전송한다. 실험 결과에서 제안한 시스템이 효과적으로 모바일 IPTV 서비스를 제공할 수 있음을 보인다.

This paper presents the mobile IPTV system for the transmission of FGS-encoded video stream over WiMAX network. The proposed system is implemented to provide more subscribers with an improved mobile IPTV service considering the scarce resource constraint. The proposed system pursues an efficient tradeoff between the number of subscribers that receive the enhancement layer stream and their IPTV service quality. In the proposed system, some parts of the enhancement layer are transmitted with the modulation scheme and the coding rate adaptive to wireless link states of subscribers. Finally, experimental results are provided to show the performance of proposed mobile IPTV system.

키워드

참고문헌

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