VORRICHTUNG UND VERFAHREN ZUR QUANTISIERUNG UND WIEDERHERSTELLUNG VON MEHRDIMENSIONALEN DIGITALEN BILDSIGNALEN

摘要

The method and apparatus of the present invention performs the quantization, sampling, and final digital image signal reconstruction in a way that reduces quantization artifacts such as contouring while retaining desired spatial (temporal) frequency response and resolution. The technique of the present invention features a spatially varying quantization step, a low pass filtering step, a second spatially varying quantization step, and a comparison step to determine the reconstructed signal.