標題: A unified fast algorithm for cosine modulated filter banks in current audio coding standards
作者: Liu, CM
Lee, WC
資訊工程學系
Department of Computer Science
公開日期: 1-Dec-1999
摘要: Current audio coding standards, such as MPEG-I layers 1-3, MPEG-II layers 1-4, MPEG-IV, and AC-3, have adopted for compression various forms of the cosine modulated filter banks (CMFBs). It is demonstrated that all modulated cosine transforms can be divided into two modules-the permutation and discrete cosine transform. The derived discrete cosine transforms are either type II, type III, or type IV. A fast computing algorithm is proposed that will compute all three types of transforms uniformly. The new fast algorithm has good features with regard to regularity, complexity, and general applicability.
URI: http://hdl.handle.net/11536/30912
ISSN: 0004-7554
期刊: JOURNAL OF THE AUDIO ENGINEERING SOCIETY
Volume: 47
Issue: 12
起始頁: 1061
結束頁: 1075
Appears in Collections:Conferences Paper