Patent ID: 7454075
Filing Date: 2008-11-18
Classification: H04N

Abstract:
1. A picture encoding apparatus comprising: memory means for writing and storing an input picture comprising a plurality of blocks from one line to another; wavelet transform means for applying wavelet transforms in the horizontal and vertical directions each time the input picture stored in the memory means reaches a predetermined number of lines required for the wavelet transforms to be applied, the wavelet transforms dividing the blocks of the input picture into a plurality of sub-bands and generating wavelet transform coefficients; quantization means for quantizing the wavelet transform coefficients and outputting quantization coefficients; and entropy encoding means for resolving the quantization coefficients into a plurality of bit planes resolved from most significant bit (MSB) to least significant bit (LSB), shifting bit planes of a plurality of blocks present in a same sub-band by a pre-set number of bits to form shifted bit planes, and entropy encoding the shifted bit planes entropy encoding means has received a predetermined number of quantization coefficients.