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 Quality Variation Control for Three-Dimensional Wavelet-Based Video Coders | Hindawi Publishing Corporation EURASIP Journal on Image and Video Processing Volume 2007 Article ID 83068 8 pages doi 2007 83068 Research Article Quality Variation Control for Three-Dimensional Wavelet-Based Video Coders Vidhya Seran and Lisimachos P Kondi Department of Electrical Engineering State University of New York at Buffalo 332 Bonner Hall Buffalo NY 14260 USA Received 15 August 2006 Revised 8 January 2007 Accepted 9 January 2007 Recommended by James E. Fowler The fluctuation of quality in time is a problem that exists in motion-compensated-temporal-filtering MCTF- based video coding. The goal of this paper is to design a solution for overcoming the distortion fluctuation challenges faced by wavelet-based video coders. We propose a new technique for determining the number of bits to be allocated to each temporal subband in order to minimize the fluctuation in the quality of the reconstructed video. Also the wavelet filter properties are explored to design suitable scaling coefficients with the objective of smoothening the temporal PSNR. The biorthogonal 5 3 wavelet filter is considered in this paper and experimental results are presented for 2D t and t 2D MCTF wavelet coders. Copyright 2007 V. Seran and L. P. Kondi. 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 Research in image sequence compression or video coding is a natural extension of research in image compression coding. Beyond the removal of spatial and spectral redundancy in response to our human visual system HVS video coding exploits further temporal correlation between consecutive frames. Owing to high similarity between adjacent frames efficient video coding significantly relies on effective removal of temporal redundancy in the source video. Wavelet-based image coding has enabled not only good compression .
