대한전자공학회논문지 (Journal of the Korean Institute of Telematics and Electronics)
- 제26권11호
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- Pages.1880-1885
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- 1989
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- 1016-135X(pISSN)
DFT에 의한 비데오 코덱용 DCT의 단순한 시스톨릭 어레이
A Simple Discrete Cosine Transform Systolic Array Based on DFT for Video Codec
초록
In this paper, a new approach for systolic array realizing the discrete cosine transform (DCT) based on discrete Fourier transform (DFT) of an input sequence is presented. The proposed array is based on a simple modified DFT(MDFT) version of the Goertzel algorithm combined with Kung's approach and is proved perfectly. This array requires N cells, one multiplier and takes N clock cycles to produce a complete N-point DCT and also is able to process a continuous stream of data sequences. We have analyzed the output signal-to-noise ratio(SNR) and designed the circuit level layout of one-PE chip. The array coefficients are static adn thus stored-product ROM's can be used in place of multipliers to limit cost as eliminate errors due to coefficients quantization.
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