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    • 1. 发明授权
    • Image encoder and image decoder
    • 图像编码器和图像解码器
    • US06956974B1
    • 2005-10-18
    • US09508813
    • 1998-09-03
    • Norio ItoShinya HasegawaHiroshi KusaoHiroyuki KatataTomoko Aono
    • Norio ItoShinya HasegawaHiroshi KusaoHiroyuki KatataTomoko Aono
    • H04N19/60G06T3/40G06T9/00H04N1/41H04N19/423H04N19/426H04N19/46H04N19/59H04N19/635H04N19/70H04N19/86H04N19/91G06K9/36
    • G06T3/4084H04N19/124H04N19/167H04N19/46H04N19/63H04N19/645H04N19/70H04N19/98
    • An image encoder/decoder by which a partial image is encoded easily with a resolution meeting the user's demand, wherein the encoded amount of data is not increased and a necessary capacity of memory can be reduced. The image encoder has a tile decomposition portion which divides image data into tiles of N pixels×M pixels, a wavelet transform coding portion which extrapolates predetermined data at the peripheries of the tiles outputted from the tile decomposition portion and performs subdivision to perform wavelet encoding. A management information generating portion generates information for managing the encoded data in order that the encoded data outputted from the wavelet transform coding portion can be decoded for each tile and for each subband of the wavelet encoding. Also, a coded data integration portion links the encoded data encoded by wavelet encoding for each tile by using the output of the management information generating portion and adds the managing information to the encoded data.
    • 一种图像编码器/解码器,通过该图像编码器/解码器以满足用户需求的分辨率容易地编码部分图像,其中编码的数据量不增加,并且可以减少必要的存储容量。 图像编码器具有将图像数据分割成N像素×M像素的片的瓦片分解部,小波变换编码部,其在从瓦片分解部输出的瓦片的周边外推外部的预定数据,并进行细分以进行小波编码。 管理信息生成部分生成用于管理编码数据的信息,以便可以对每个瓦片和小波编码的每个子带对从小波变换编码部分输出的编码数据进行解码。 此外,编码数据合成部分通过使用管理信息生成部分的输出来链接每个片段的小波编码编码的编码数据,并将管理信息添加到编码数据。