Method, apparatus and system for encoding and decoding video data

METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING A system and method for generating a precinct of video data from a video bitstream, the precinct of video data including one or more subbands. The method comprises decoding(802) an offset table from the video bitstream, the offset table defining a set of non-uniform quantisation offsets, each quantisation offset of the set of non-uniform quantisation offsets applied to a group of subband coefficients of the video data, wherein the offset table is generated (706) to decrease a precision afforded to subband coefficients of portions of the subband containing greater magnitude coefficients relative to portions of the subband containing relatively lower magnitude coefficients. The method further comprises decoding a group of subband coefficients for a subband from the video bitstream by applying the decoded offset table to determine a number of bits to read for each coefficient based on the quantisation offset for the group of sub-band coefficients (804); and applying an inverse wavelet transform to the decoded group of sub-band coefficients to generate the precinct of video data (808). 12799018_1 CCY) CC~) co' 0 c CC) co c