基于CDMA技术，实现数字水印的嵌入与提取，具有嵌入容量大，抗干扰能力强的优点-Based on CDMA technology, the realization of digital watermark embedding and extraction with embedded large capacity, the advantages of anti-interference ability

实现cdma、cor 数字水印信息的嵌入与恢复-To achieve cdma, cor digital watermark embedding and recovery

dither modulation for embedding watermark