کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6959122 1451954 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A class of DCT approximations based on the Feig-Winograd algorithm
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
پیش نمایش صفحه اول مقاله
A class of DCT approximations based on the Feig-Winograd algorithm
چکیده انگلیسی
A new class of matrices based on a parametrization of the Feig-Winograd factorization of 8-point DCT is proposed. Such parametrization induces a matrix subspace, which unifies a number of existing methods for DCT approximation. By solving a comprehensive multicriteria optimization problem, we identified several new DCT approximations. Obtained solutions were sought to possess the following properties: (i) low multiplierless computational complexity, (ii) orthogonality or near orthogonality, (iii) low complexity invertibility, and (iv) close proximity and performance to the exact DCT. Proposed approximations were submitted to assessment in terms of proximity to the DCT, coding performance, and suitability for image compression. Considering Pareto efficiency, particular new proposed approximations could outperform various existing methods archived in literature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Signal Processing - Volume 113, August 2015, Pages 38-51
نویسندگان
, , ,