Patent ID: 6483946
Filing Date: 2002-11-19
Classification: H04N

Abstract:
A method for encoding an input image using a wavelet transform to produce a wavelet tree having a plurality of nodes organized in a parent-child relationship, said method comprising the steps of:generating a wavelet tree for the input image, said wavelet tree having a plurality of coefficients, where each of said coefficients in said plurality of coefficients corresponds to a node of said wavelet tree; reorganizing said plurality of coefficients in said wavelet tree into a plurality of wavelet blocks where each wavelet block represents a depth first pattern of coefficients of said input image at a given spatial location in said input image; quantizing said plurality of coefficients in a depth first pattern by quantizing each wavelet block, wherein quantizing a particular wavelet block quantizes the coefficients in that particular block in a death first pattern; assigning a symbol to each of said plurality of quantized coefficients; and coding said plurality of coefficient symbols.