Title :
Direct transform to transform computation
Author :
Skodras, Athanassios N.
Author_Institution :
Electron. Lab., Patras Univ., Greece
Abstract :
An efficient direct method for the computation of a length-N discrete cosine transform (DCT) given two adjacent length-(N/2) DCT coefficients, is presented. The computational complexity of the proposed method is lower than the traditional approach for lengths N>8. Savings of N memory locations and 2N data transfers are also achieved.
Keywords :
computational complexity; data compression; discrete cosine transforms; signal processing; transform coding; DCT coefficients; computational complexity; data transfers; discrete cosine transform; efficient direct method; memory locations saving; signal compression; Computational complexity; Discrete cosine transforms; Discrete transforms; Flow graphs; Image coding; Image resolution; Signal resolution; Transcoding; Transform coding; Video compression;
Journal_Title :
Signal Processing Letters, IEEE
