DCT-like Transform for Image and Video Compression Requires 10 Additions Only.
Renato J. Cintra, Fábio M. Bayer, Vítor A. Coutinho, Sunera Kulasekera, Arjuna Madanayake · arXiv (Cornell University) · 2014
A multiplierless pruned approximate 8-point discrete cosine transform (DCT) requiring only 10 additions is introduced. The proposed algorithm was assessed in image and video compression, showing competitive performance with state-of-the-art methods. Digital implementation in 45 nm CMOS technology up to place-and-route level indicates clock speed of 255 MHz at a 1.1 V supply. The 8x8 block rate is 31.875 MHz.The DCT approximation was embedded into HEVC reference software; resulting video frames, at up to 327 Hz for 8-bit RGB HEVC, presented negligible image degradation.