000052251 001__ 52251
000052251 005__ 20190316233442.0
000052251 02470 $$2ISI$$aA1997BJ70Q00017
000052251 037__ $$aREP_WORK
000052251 245__ $$aReliable Transmission of MPEG-2 VBR Video Streams over New Network Adaptation and ATM Adaptation Layers
000052251 269__ $$a1997
000052251 260__ $$c1997
000052251 336__ $$aReports
000052251 520__ $$aThis paper adresses the transmission of VBR MPEG-2 video streams on top of both Network Adaptation (NAL) and ATM Adaptation Layers (AAL) for real-time multimedia applications. The NAL, specific to MPEG-2, provides a selective data protection mechanism based on syntactic criteria. The AAL provides a reliable transmission by applying per-cell sequence numbering combined with a selective Forward Error Correction (FEC) mechanism based on Burst Erasure codes. Studies carried out with Constant Bit Rate (CBR) video streams showed improvements in terms of network performance evaluated by the cell loss ratio (CLR) as well as in terms of user perceived quality compared to the performance obtained with AAL5 under the same network conditions. This paper proposes improvements at the NAL and presents the results obtained for the transmission of Variable Bit Rate (VBR) video streams. To evalute the impact of cell losses at the application level, we apply a perceptual quality measure to the decoded MPEG-2 sequences which allows us to evaluate performance at the user level.
000052251 700__ $$aAdanez, Xavier Garcia
000052251 700__ $$aVerscheure, Olivier
000052251 700__ $$0241061$$g101475$$aFrossard, Pascal
000052251 8564_ $$uhttps://infoscience.epfl.ch/record/52251/files/IC_TECH_REPORT_199724.pdf$$zn/a$$s847069
000052251 909C0 $$xU10851$$0252393$$pLTS4
000052251 909CO $$ooai:infoscience.tind.io:52251$$qGLOBAL_SET$$pSTI$$preport
000052251 937__ $$aEPFL-REPORT-52251
000052251 970__ $$a199724/IC
000052251 973__ $$sPUBLISHED$$aEPFL
000052251 980__ $$aREPORT