Abstract

Reports on a new recursive discrete cosine transform (DCT) architecture that is more efficient in terms of area and power in comparison with recently published recursive DCT architectures. Our approach employs A-, B- and C-type Goertzel filters. These three different realizations of Goertzel filters, together with a multiplier-less implementation of loop multiplications, are used so as to reduce the area, the multiplier delay and undesirable transitions, and hence the power consumption. The newly proposed DCT structure has been compared with conventional recursive implementations at different transform lengths, to observe that there are potential savings both in area and power.

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