Earticle

초록

영어

Wireless video transmission suffers from degrading the quality of video service due to dynamic change of the wireless network environment. Packet-level forward error correction (FEC) enables video to be transmitted robustly as adding the redundant packets. This paper proposes two cross-layer strategies to improve the quality of video using the adaptive packet-level FEC over IEEE 802.11 networks. These strategies adaptively produce redundant packets according to the types of video frames encoded by H.264. Among the frame types, I frame (Intra frame) is the most important because it is referenced by other frames as well as decoded by itself without the prediction of any other frames. One approach, named AFEC_PI (Adaptive FEC with Priority to Intra frames), generates FEC packets only for Intra frames. The other, named AFEC_BI (Adaptive FEC with Both Intra and Inter frames), makes FEC packets for all frames, but applies differential level according to the types of frames. By using the two approaches, the received video quality is estimated based on the various error rates in wireless networks. Experimental results show that AFEC_PI improves video quality as generating fewer FEC packets than the traditional packet-level FEC and AFEC_BI increases PSNR more than AFEC_PI at a low error rate.

목차

Abstract
 1. Introduction
 2. Background
  2.1. H.264
  2.2. Packet-Level FEC Mechanism
 3. Adaptive Packet-level FEC Algorithm
 4. Simulation and Evaluation
  4.1. Simulation Environment
  4.2. Evaluation of FEC Efficiency
  4.3. Results
 5. Conclusions
 References

키워드

저자

• Yejin Sohn [ Department of Computer Science, Seoul Women’s University ]
• Jun Hwang [ Department of Computer Science, Seoul Women’s University ]
• Seung-Seok Kang [ Department of Computer Science, Seoul Women’s University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Software Engineering and Its Applications

• 간기

  월간

• pISSN

  1738-9984

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605