Patent ID: 7016546

Claim:
A picture encoding apparatus comprising: memory means for writing and storing an input picture from one line to another; wavelet transform means for applying a wavelet transform in the horizontal and vertical directions each time a number of lines required for the wavelet transform is stored in said memory means; thereby generating wavelet transform coefficients for a plurality of sub-bands; quantization means for quantizing wavelet transform coefficients for each sub-band obtained from said wavelet transform means; block picture analysis means for analyzing the motion information in a block picture and the degree of fineness of the texture for each block area in said input picture; and entropy encoding means for entropy encoding quantized coefficients for each sub-band from said quantization means in units of block areas when the number of samples of said quantized coefficients has reached the size of a block area required for entropy encoding; wherein said quantization means includes means for determining ultimate weighting coefficients for quantizing using both a table of weighting coefficients for each sub-band generated at the time of the wavelet transform and weighting coefficients for each block area derived from the analyzed motion information.