tailieunhanh - Báo cáo hóa học: "Research Article Graceful Degradation in 3GPP MBMS Mobile TV Services Using H.264/AVC Temporal Scalability"

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 Graceful Degradation in 3GPP MBMS Mobile TV Services Using Temporal Scalability | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 207210 15 pages doi 2009 207210 Research Article Graceful Degradation in 3GPP MBMS Mobile TV Services Using AVC Temporal Scalability Cornelius Hellge 1 2 Thomas Schierl 1 Jorg Huschke 3 Thomas Rusert 3 Markus Kampmann 3 and Thomas Wiegand1 2 Hmage Processing Department Fraunhofer Institute for Telecommunications-Heinrich Hertz Institute Einsteinufer 37 10587 Berlin Germany 2Image Communications Group Department of Telecommunication Systems Technische Universitãt Berlin Einsteinufer 17 10587 Berlin Germany 3Ericsson Research Mobile Multimedia Networks Ericsson GmbH Eurolab R D Ericsson Allee 1 52134 Herzogenrath Germany Correspondence should be addressed to Cornelius Hellge Received 6 January 2009 Revised 19 June 2009 Accepted 26 August 2009 Recommended by Farid Ahmed These days there is an increasing interest in Mobile TV broadcast services shown by customers as well as service providers. One general problem of Mobile TV broadcast services is to maximize the coverage of users receiving an acceptable service quality which is mainly influenced by the user s position and mobility within the cell. In this paper graceful degradation is considered as an approach for improved service availability and coverage. We present a layered transmission approach for 3GPP s Release 6 Multimedia and Broadcast Service MBMS based on temporal scalability using AVC Baseline Profile. A differentiation in robustness between temporal quality layers is achieved by unequal error protection approach based on either application layer Forward Error Correction FEC or unequal transmit power for the layers or even a combination of both. We discuss the corresponding MBMS service as well as network settings and define measures allowing for evaluating the amount of users reached with a certain mobile terminal play-out quality while .