... 件字数 Word Count 有效字数 effective character number 字数字段 alphanumeric field ...
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This algorithm, which based on relational databases' character and the number of quantitative data's effective bits, combines with the theory of error correction in the field of digital communication.
理论分析和实验结果表明，该算法具有隐蔽性好，水印恢复不需要原始数据库，水印的鲁棒性及可嵌入的信息量可以通过调整参数取值进行调节等特点。
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