Cross-Layer Detection of Visual Impairments in H.264/AVC Video Sequences streamed over UMTS Networks
Incorrectly received packets in low-rate video sequences result in the loss of considerably large picture areas that have to be concealed. The performance of error concealment decreases with the size of the interpolated picture area. The incorrectly received packets may still contain some correct information that can be exploited at the decoder. In this work we propose the utilization of information from the link layer of UMTS (Universal Mobile Telecommunications System) at the application layer for better pre-localization of errors in the bitstream domain. Syntax check together with the detection of impairments in the pixel domain decide which part of the incorrectly received packets will be concealed. We evaluate the results using error traces from the live UMTS network and H.264/AVC (Advanced Video Coding) encoded video stream. Apart from reduced complexity facilitated by the cross-layer approach, the proposed method gains 1.09 dBs of Y-PSNR compared to a slice rejection mechanism.
Video streaming UMTS H.264/AVC error resilience error detection cross-layer
Luca Superiori Olivia Nemethova Wolfgang Karner Markus Rupp
Institute of Communications and Radio-Frequency EngineeringVienna University of Technology, AustriaG Institute of Communications and Radio-Frequency Engineering Vienna University of Technology, Austria
国际会议
首届无线通信跨层设计国际学术研讨会(1st International Workshop on Cross Layer Design)
济南
英文
1-4
2007-09-20（万方平台首次上网日期，不代表论文的发表时间）