发明申请
- 专利标题: METHODS AND APPARATUS FOR ENHANCING THE ROBUSTNESS OF WATERMARK EXTRACTION FROM DIGITAL HOST CONTENT
- 专利标题(中): 从数字主机内容增强水印提取的可靠性的方法和装置
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申请号: US12567620申请日: 2009-09-25
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公开(公告)号: US20100111355A1公开(公告)日: 2010-05-06
- 发明人: Rade Petrovic , Babak Tehranchi , Joseph M. Winograd , Kanaan Jemili
- 申请人: Rade Petrovic , Babak Tehranchi , Joseph M. Winograd , Kanaan Jemili
- 专利权人: Verance Corporation
- 当前专利权人: Verance Corporation
- 主分类号: G06K9/00
- IPC分类号: G06K9/00 ; G10L19/00
摘要:
Methods and apparatus for enhancing the robustness of watermark extraction from digital host content are provided. Embedded watermarks may be extracted from received digital host content in accordance with a stego key. A first watermark is extracted and a number of errors in the first extracted watermark is assessed. If the number of errors is above a first pre-determined value, at least a second watermark is extracted from the host content. A number of errors in at least the second extracted watermark is assessed. If the number of errors in at least the second extracted watermark is above a second pre-determined value, the extraction results for the extracted watermarks are combined in order to cumulatively assess the validity of the first extracted watermark and at least the second extracted watermark.