发明授权
US07715588B2 Two level cross-correlation based system for watermarking continuous digital media 有权
用于水印连续数字媒体的两级互相关系统

Two level cross-correlation based system for watermarking continuous digital media
摘要:
A two level cross-correlation based system for watermarking continuous digital media at the system application level. It is a post-compression process for watermarking where no a priori knowledge of the underlying compression algorithm is required. Per each compressed media frame, a current unique digital signature is generated based on the data from the current compressed frame plus the digital signature that has been previously generated. The signature thus generated is then used in conjunction with the next compressed frame to generate the next unique digital signature. All digital signatures are correlated according to the above process until a “reset” signal is issued. A new chain of correlated digital signatures is produced by the system with a pre-determined initial signature.
信息查询
0/0