Patent ID: 7689052
Filing Date: 2010-03-30
Classification: G06F

Abstract:
1. A method of multi-media signal processing using a processor, the method comprising using the processor to perform actions of: separating an input multi-media signal into possibly overlapping data blocks; and applying a fixed-point approximation of an ideal linear transformation to at least some of the blocks, where the fixed-point approximation of the ideal linear transformation is structured as a decomposition of the ideal linear transformation formed by factoring one or more parts of the ideal linear transformation into a cascade of simpler transformations, the simpler transformations comprising one or more primitive operations that can be performed by a multiplication of the input data by a constant fixed-point number, where the value of one or more of the constant fixed-point numbers differs from the closest fixed-point approximation of an ideal constant multiplier value in the simpler transformation in a manner having the effect of increasing the precision of the approximation relative to the ideal linear transformation.