tailieunhanh - Báo cáo hóa học: " Research Article A Complexity-Aware Video Adaptation Mechanism for Live Streaming Systems"

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 A Complexity-Aware Video Adaptation Mechanism for Live Streaming Systems | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 47921 10 pages doi 2007 47921 Research Article A Complexity-Aware Video Adaptation Mechanism for Live Streaming Systems Meng-Ting Lu 1 Jason J. Yao 1 and Homer H. Chen2 1 Department of Electrical Engineering Graduate Institute of Communication Engineering National Taiwan University Taipei 10617 Taiwan 2 Department of Electrical Engineering Graduate Institute of Communication Engineering and Graduate Institute of Networking and Multimedia National Taiwan University Taipei 10617 Taiwan Received 3 October 2006 Accepted 21 March 2007 Recommended by Alex Kot The paradigm shift of network design from performance-centric to constraint-centric has called for new signal processing techniques to deal with various aspects of resource-constrained communication and networking. In this paper we consider the computational constraints of a multimedia communication system and propose a video adaptation mechanism for live video streaming of multiple channels. The video adaptation mechanism includes three salient features. First it adjusts the computational resource of the streaming server block by block to provide a fine control of the encoding complexity. Second as far as we know it is the first mechanism to allocate the computational resource to multiple channels. Third it utilizes a complexity-distortion model to determine the optimal coding parameter values to achieve global optimization. These techniques constitute the basic building blocks for a successful application of wireless and Internet video to digital home surveillance IPTV and online games. Copyright 2007 Meng-Ting Lu et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Multimedia streaming is one of the most challenging services .