DCT approximation for low bit rate coding using a conditional transform
Ricardo Lopes de Queiroz · Proceedings - International Conference on Image Processing · 2003
A transform approximation is explored for speeding up the software compression of images and video. It is used to replace the regular DCT whenever only a few DCT coefficients are actually encoded. A conditional transform is proposed to transform only the data that it determines to be relevant. The approximation is applicable to environments combining the requirements of high compression and low complexity.