A scaled DCT architecture with the CORDIC algorithm
| Autor: | Sungwook Yu, E.E. Swartzlander |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Scale factor (computer science)
Signal processing Digital signal processor Scale (ratio) Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Parallel computing Scale factor Compensation (engineering) Computer Science::Hardware Architecture Computer Science::Multimedia Signal Processing Discrete cosine transform Hardware_ARITHMETICANDLOGICSTRUCTURES Electrical and Electronic Engineering Architecture CORDIC Algorithm |
| Zdroj: | IEEE Transactions on Signal Processing. 50:160-167 |
| ISSN: | 1053-587X |
| DOI: | 10.1109/78.972492 |
| Popis: | This paper presents an efficient approach for computing the N-point (N=2/sup n/) scaled discrete cosine transform (DCT) with the coordinate rotation digital computer (CORDIC) algorithm. The proposed algorithm is based on an indirect approach for computing the DCT so that the vector rotations are completely separated from the other operations and placed at the end of the DCT unit. As a result, unlike the other CORDIC-based DCT architectures, the proposed scaled DCT architecture does not require scale factor compensation. The number of CORDIC iterations is minimized through the optimal angle recoding method based on the three-value CORDIC algorithm. Although this three-value CORDIC algorithm results in different scale factors for different angles, this does not incur any extra hardware in the proposed scaled DCT architecture. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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