Patent ID: 6898325
Filing Date: 2005-05-24
Classification: G11B,H04N

Abstract:
1. A method comprising: applying an inverse wavelet transform having a 5,3 wavelet transform filter to data repeatedly for a plurality of decomposition levels during quantization of wavelet coefficients that is performed using a plurality of stages including one or more intermediate stages and a final stage; and for each of the plurality of decomposition levels, clipping, after each application of the inverse wavelet transform during the one or more intermediate stages prior to the final stage, any value generated as a result of application of the inverse wavelet transform that exceeds a predetermined range associated with that decomposition level subband of the inverse wavelet transform including, after the inverse wavelet transform for 8-bit input samples, clipping low-pass coefficients exceeding the respective predetermined range to a value ranging from approximately −191 to 191.