%0 Journal Article %A WANG Yishou %A XU Jiangfeng %T Improved PPCT hybrid coding scheme %D 2012 %R %J Computer Engineering and Applications %P 107-111 %V 48 %N 34 %X The software watermark technology is not mature, and there are a lot of problems. CollBerg and Thomborson make a classification of software watermark, and put forward data structure based watermark embedding method, but the efficiency dynamic figure coding of PPCT is low. Combining with radix-k encoding and PPCT encoding, mixed encoding is done. The right pointer of the leaf node can point to the all nodes, using leaves nodes to  code, improving the data embedding rate, and using the left pointer of the leaf node to check, improving robustness. %U http://cea.ceaj.org/EN/abstract/article_29707.shtml