Title :
A fast algorithm of integer MDCT for lossless audio coding
Author :
Haibin, Huang ; Rahardja, Susanto ; Rongshan, Yu ; Xiao, Lin
Author_Institution :
Inst. for Infocomm Res., Singapore, Singapore
Abstract :
A new fast algorithm to implement integer modified discrete cosine transform (IntMDCT) is proposed. It is shown that the total rounding operations required for this algorithm are only 2.5N, where N is the block size. As a result, its approximation error is far less than that of directly converted integer transforms. At the same time, the complexity is greatly reduced, which results in improved performance of a lossless audio coding system employing the IntMDCT in terms of compression ratio and complexity costs.
Keywords :
approximation theory; audio coding; computational complexity; discrete cosine transforms; matrix algebra; transform coding; approximation error; complexity costs; compression ratio; directly converted integer transforms; integer modified DCT; integer modified discrete cosine transform; lossless audio coding; permutation matrix; transform matrix; Approximation error; Audio coding; Costs; Discrete cosine transforms; Discrete transforms; Image sampling; Matrix decomposition; Neural networks; Performance loss; Prototypes;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1326792
