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    • 65. 发明申请
    • ERROR RESILIENT STILL IMAGE PACKETIZATION METHOD AND PACKET STRUCTURE
    • 错误恢复静态图像封装方法和分组结构
    • WO00054511A2
    • 2000-09-14
    • PCT/US2000/006174
    • 2000-03-09
    • G06T9/00H04N7/26H04N21/2383H04N21/242H04N21/81
    • H04N21/242H04N19/63H04N19/65H04N19/68H04N19/89H04N21/2383H04N21/8146
    • A packetization method and packet structure improve the robustness of a bitstream generated when a still image is decomposed with a wavelet transform. The wavelet coefficients of one "texture unit" are scanned and coded in accordance with a chosen scanning method to produce a bitstream. The bitstreams for an integral number of texture units are assembled into a packet, each of which includes a packet header. Each packet header includes a resynchronization marker to enable a decoder to resynchronize with the bitstream if synchronization is lost, and an index number which absolutely identifies one of the texture units in the packet to enable a decoder to associate following packets with their correct position in the wavelet transfer domain. The domain information enables a channel error to be localized to a particular packet, preventing the effects of the error from propagating beyond packet boundaries. The invention is applicable to the pending MPEG-4 and JPEG-2000 image compression standards.
    • 分组方法和分组结构提高了当利用小波变换分解静止图像时产生的比特流的鲁棒性。 根据选择的扫描方法对一个“纹理单元”的小波系数进行扫描和编码以产生比特流。 用于整体数量的纹理单元的比特流被组合成分组,每个分组包括分组报头。 每个分组报头包括重新同步标记,以使解码器能够在同步丢失时与比特流重新同步;以及索引号,其绝对地标识分组中的一个纹理单元,以使解码器能够将后续分组与其中的正确位置相关联 小波转移域。 域信息使得信道错误能够被定位到特定分组,从而防止错误的影响超出分组边界。 本发明适用于未决的MPEG-4和JPEG-2000图像压缩标准。