Patent ID: 6956903
Filing Date: 2005-10-18
Classification: H04N

Abstract:
1. A method of applying an inverse three-dimensional discrete wavelet transformation (3D IDWT) to a plurality of transformed video image sub-blocks, said sub-blocks comprising transformed frames, and said frames comprising rows and columns, said method comprising: inverse transforming the sub-blocks of transformed video images by: (1) applying a bit-based conditional decoding to the embedded zero tree encoded DWT coefficients of the block to obtain a DWT coefficient matrix; (2) up-sampling respective sub-blocks of the DWT coefficient matrix by row, column and frame; (3) filtering and combining one or more respective pairs of up-sampled sub-blocks to produce an up-sampled sub-block corresponding to each respective pair; (4) reapplying (3) to any produced up-sampled sub-block pairs until one up-sampled sub-block remains; (5) multiplying the one remaining up-sampled sub-block by eight to produce a block at the next higher resolution.