Record number :
104828
Title of article :
Fast IMDCT and MDCT algorithms - a matrix approach
Author/Authors :
Cheng، Mu-Huo نويسنده , , Hsu، Yu-Hsin نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
-220
From page :
221
To page :
0
Abstract :
This paper presents a systematic investigation of the modified discrete cosine transform/inverse modified discrete cosine transform (MDCT/IMDCT) algorithm using a matrix representation. This approach results in new understanding of the MDCT/IMDCT, enables the development of new algorithms, and makes clear the connection between the algorithms. We represent in a matrix form the IMDCT as the product of the type-IV DCT with simple scaling, sign-changing, and permutation operations such that fast algorithms for the type-IV DCT can be simply modified for the IMDCT, and vice versa. Then, the simple symmetry and inversion properties of the type-IV DCT are used to develop new algorithms and establish the connection between existing fast IMDCT algorithms. This approach also enables us to show that MDCT and IMDCT share common core operation and present an efficient architecture for implementing both the MDCT and the IMDCT in one hardware.
Keywords :
Power-aware
Journal title :
IEEE TRANSACTIONS ON SIGNAL PROCESSING
Journal title :
IEEE TRANSACTIONS ON SIGNAL PROCESSING
Serial Year :
2003
Link To Document :
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