Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Comparison of Error Protection Methods for Audio-Video Broadcast over DVB-H | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID71801 12 pages doi 2007 71801 Research Article Comparison of Error Protection Methods for Audio-Video Broadcast over DVB-H Miska M. Hannuksela 1 Vinod Kumar Malamal Vadakital 2 and Satu Jumisko-Pyykko3 1 Nokia Research Center . Box 1000 33721 Tampere Finland 2 Institute of Signal Processing Tampere University of Technology . Box 553 33101 Tampere Finland 3 Institute of Human-Centered Technology Tampere University of Technology . Box 553 33101 Tampere Finland Received 1 September 2006 Revised 21 February 2007 Accepted 16 April 2007 Recommended by Anthony Vetro The paper discusses methods for robust audio-video broadcast over the digital video broadcasting-handheld DVB-H system. DVB-H includes a link-layer forward error correction FEC scheme known as multiprotocol encapsulation MPE FEC which provides equal error protection EEP to the transmitted media streams. Several approaches for unequal error protection UEP have been proposed in the literature and the applicability of some of them to DVB-H is analyzed in the paper. A link-layer UEP method based on priority segmentation of the media streams is chosen for more detailed analysis. According to the method audio and the most important coded video pictures are protected by MPE-FEC more robustly compared to the remaining coded pictures. In order to compare EEP and UEP in a DVB-H environment an error-prone DVB-H channel was simulated audio-visual clips were sent through it and a comprehensive subjective quality evaluation was conducted in a controlled laboratory environment. The results of the subjective evaluation revealed that the use of UEP improves the subjective quality of some test clips noticeably when the channel conditions were severe while in other tested channel conditions and clips UEP and EEP performed equally well. Copyright 2007 Miska M. Hannuksela et al. This is an open access article .
