tailieunhanh - Báo cáo hóa học: "Robust System and Cross-Layer Design for H.264/AVC-Based Wireless Video Applications"

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: Robust System and Cross-Layer Design for Wireless Video Applications | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article 1D8937I Pages 1-15 DOI ASP 2006 89371 Robust System and Cross-Layer Design for AVC-Based Wireless Video Applications Thomas Stockhammer BenQ Mobile Haidenauplatz 1 81667 Munich Germany Received 18 March 2005 Revised 30 September 2005 Accepted 4 October 2005 AVC is an essential component in emerging wireless video applications thanks to its excellent compression efficiency and network-friendly design. However a video coding standard itself is only a single component within a complex system. Its effectiveness strongly depends on the appropriate configuration of encoders decoders as well as transport and network features. The applicability of different features depends on application constraints the availability and quality of feedback and cross-layer information andthe accessible quality-of-service QoS tools in modern wireless networks. We discuss robust integration of AVC in wireless real-time video applications. Specifically the use of different coding and transport-related features for different application types is elaborated. Guidelines for the selection of appropriate coding tools encoder and decoder settings as well as transport and network parameters are provided and justified. Selected simulation results show the superiority of lower layer error control over application layer error control and video error resilience features. Copyright 2006 Hindawi Publishing Corporation. All rights reserved. 1. INTRODUCTION Most of the emerging and future mobile client devices will significantly differ from those being used for speech communications only handheld devices will be equipped with color displays and cameras and they will have sufficient processing power which allows presentation recording and encod-ing decoding of video sequences. In addition emerging and future wireless systems will provide sufficient bitrates to support video communication

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