First, the SPIHT coded streams is segmented by LIP and LIS. CRC code is implemented to conceal error propagations within each segment.

首先，SPIHT编码流根据LIP和LIS分段，应用于每一段码流的CRC检错码把错误的传播限制在每一段内。

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This method build a dictionary library that take the strokes and stroke segment as the index parameters by making use of the stroke segment and chain code character;

该方法借鉴笔段链码特征，建立以笔画一笔段数目作为检索参数的字典库；

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