HIGH SPEED DISCRETE WAVELET TRANSFORMERDWT CAPABLE OF FASTLY ENCODING STILL IMAGE BASED ON ENERGY BY BLOCK AND METHOD THEREOF

摘要

A high-speed block discrete wavelet transform apparatus which can wavelet encoded still images on the basis of specific energy is disclosed. High-speed discrete wavelet transformation device is an energy calculation on the pixel size of the input image in the energy calculating unit, a block unit for calculating the energy in units of blocks consisting of a sub-sampling unit, the sub-sampled predetermined pixels the image for performing a sub-sampling to reduce the ratio given have values ​​depending on the size of the adaptive image decomposition unit for variably determines the lifting converted level value, and the determined lifting encoding to perform encoding of the input image on the basis of lifting the lifting converted level value portion.