WiMAX 상에서 H.264/AVC의 향상된 Queue Management 기법
Advanced Queue Management of H.264/AVC in WiMAX Systems
- 주제(키워드) WiMAX , H.264/AVC , Queue Management
- 주제(KDC) 모바일 와이맥스
- 주제(DDC) 큐 매니지먼트
- 발행기관 아주대학교
- 지도교수 최영준
- 발행년도 2012
- 학위수여년월 2012. 2
- 학위명 석사
- 학과 및 전공 일반대학원 컴퓨터공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000012283
- 본문언어 한국어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
본 논문에서는 Mobile WiMAX의 하향링크에서 H.264/AVC로 인코딩 된 동영상의 질을 높이기 위해 새로운 큐 관리 기법을 제 안한다. 동영상 패킷의 GoP, 프레임 타입과 프레임 순서를 파악함 으로써, 큐 길이가 임계치 이상 길어졌을 때, 중요성이 떨어지는 P 또는 B 프레임 패킷을 삭제함으로써 Queue overflow를 미연에 방 지하고, Overflow 발생 시에도 큐에서 손실된 패킷의 타입을 파악 함으로써, 패킷이 전송되어도 복호화가 불가능한 패킷의 전송을 사 전에 차단하는 방법을 제안했다. 제안한 방법을 검증하기 위해 H.264/AVC로 생성한 비디오 트래픽을 분석했고, 각 프레임의 손상 이 동영상 질에 미치는 영향을 측정했다. 제안한 방법을 ns-2 시뮬 레이터와 Evalvid 모듈을 사용해 PSNR 값을 구한 결과 MOS 등 급이 약 8% 향상되었음을 알 수 있었다.
more목차
제 1장 서론 ····················································································1
제 2장 기본 이론 ··········································································4
제 1절 mobile WiMAX의 QoS ····················································· 4
제 2절 H.264/AVC ·········································································6
제 3장 Queue Management 기법 ·············································9
제 4장 모의 실험 및 결과 ························································13
제 5장 결론 ··················································································19
참고문헌 ························································································20
Abstract ························································································22
