SELECTION OF THE MAXIMUM DYNAMIC RANGE OF TRANSFORMED DATA AND THE DATA PRECISION OF TRANSFORM MATRICES ACCORDING TO THE BIT DEPTH OF INPUT DATA

摘要

A method of encoding image data, including: frequency-transforming input image data to generate an array of frequency-transformed input image coefficients by a matrix-multiplication process, according to a maximum dynamic range of the transformed data and using transform matrices having a data precision; and selecting the maximum dynamic range and/or the data precision of the transform matrices according to the bit depth of the input image data.