A Simple Discrete Cosine Transform Systolic Array Based on DFT for Video Codec

DFT에 의한 비데오 코덱용 DCT의 단순한 시스톨릭 어레이

  • 박종오 (전북대학교 전자공학과) ;
  • 이광재 (전북대학교 전자공학과) ;
  • 양근호 (전북대학교 전자공학과) ;
  • 박주용 (전북대학교 정보통신공학과) ;
  • 이문호 (전북대학교 정보통신공학과)
  • Published : 1989.11.01

Abstract

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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