DCT approximation for low bit rate coding using a conditional transform

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 few DCT coefficients are actually encoded. A conditional transform is proposed to only transform the data that it determines to be relevant. The approximation is applicable to environments combining the requirements of high compression and low complexity.

• Type: Conference
• Year: 2002
• Where: ICIP
• Authors: Ricardo L. de Queiroz
• Keywords: Conditional Transform, DCT Coefficients, ICIP 2002, Image Processing, Transform Approximation