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Method for realising reversible integer type-IV discrete cosine transform

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4 Author(s)
Huang, H. ; Inst. for Infocomm Res., Agency for Sci., Singapore ; Yu, R. ; Lin, X. ; Rahardja, S.

A novel method for realising reversible integer discrete cosine transform type IV (DCT-IV) is presented. The method is derived by first constructing a transform matrix using DCT-IV matrix, then factorising the transform matrix into the product of three lifting matrices. The proposed method exhibits low rounding number and is the most accurate to the floating-point DCT-IV transform.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 8 )

Date of Publication:

15 April 2004

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