摘要
本文介绍了PDF417条码实现中的模式切换、子模式切换和纠错码计算等难点,实现了文本模式、字节模式和数字模式下的数据压缩算法,给出了码字符号长度最短的优化编码算法。针对PDF417条码采用的Reed-Solomon错误控制码算法,本文提出了一种优化的查表算法。
The difficulties of encoding barcode PDF417 are introduced, such as compaction mode switching and subschema switching, error correction code calculation. The data compression algorithms in text mode, byte mode and number mode are implemented, an optimization encoding algorithm of the shortest length of codewords is presented, and an optimization check-table algorithm is presented for calculating error correction code words using the Reed Solomon techniques.
出处
《计算机工程与科学》
CSCD
2007年第4期78-80,共3页
Computer Engineering & Science
