Patent ID: 6819800
Filing Date: 2004-11-16
Classification: H04N

Abstract:
A moving image compression/decompression apparatus comprising:an A/D converter for converting moving image data into digital data: a wavelet transformer for dividing the digital data converted by said A/D converter into a plurality of level regions and wavelet-transforming the divided data; a quantizer for quantizing the data wavelet-transformed by said wavelet transformer with predetermined weight corresponding to each of the level regions; an SZT coder for performing a lossless DPCM coding with respect to the data quantized by said quantizer sequentially from high level region to low level region using a similarity between the level regions based on a predetermined SZT map; a Huffman coder for encoding the data subject to SZT coding by said SZT coder based on the probability of high frequency components which exist in each of the level regions; and a stream file generator for outputting the data encoded by said Huffman coder as bit stream.