Abstract
In this transactions brief, we propose new fixed-coefficient recursive structures for computing discrete cosine transforms with the power-of-two length. The fixed-coefficient recursive structures are developed by exploring the periodicity embedded in transform bases, whose indices can form a complete residue system or a complete odd residue system. After simple data manipulation, the proposed filtering structures requiring fixed-coefficient multipliers are better than the previous recursive methods which need general multipliers in filter realization. In particular, we found that the properly selected fixed-coefficient filters achieve lower roundoff errors than the nominal variable-coefficient ones for computing DCT's in finite-word-length machines.
Original language | English |
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Pages (from-to) | 211-216 |
Number of pages | 6 |
Journal | IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing |
Volume | 46 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1999 Feb |
All Science Journal Classification (ASJC) codes
- Signal Processing
- Electrical and Electronic Engineering