发明授权
US08806215B2 Method and system for robust watermark insertion and extraction for digital set-top boxes
有权
用于数字机顶盒鲁棒水印插入和提取的方法和系统
- 专利标题: Method and system for robust watermark insertion and extraction for digital set-top boxes
- 专利标题(中): 用于数字机顶盒鲁棒水印插入和提取的方法和系统
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申请号: US13604914申请日: 2012-09-06
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公开(公告)号: US08806215B2公开(公告)日: 2014-08-12
- 发明人: Sherman Xuemin Chen , Stephane Rodgers
- 申请人: Sherman Xuemin Chen , Stephane Rodgers
- 申请人地址: US CA Irvine
- 专利权人: Broadcom Corporation
- 当前专利权人: Broadcom Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- 主分类号: H04L9/32
- IPC分类号: H04L9/32 ; H04N7/167
摘要:
Methods and systems for robust watermark insertion and extraction for digital set-top boxes are disclosed and may include descrambling, detecting watermarking messages in a received video signal utilizing a watermark message parser, and immediately watermarking the descrambled video signal utilizing an embedded CPU. The embedded CPU may utilize code that may be signed by an authorized key, encrypted externally to the chip, decrypted, and stored in memory in a region off-limits to other processors. The video signal may be watermarked in a decompressed domain. The enabling of the watermarking may be verified utilizing a watchdog timer. The descriptors corresponding to the watermarking may be stored in memory that may be inaccessible by the main CPU. The watermark may comprise unique identifier data specific to the chip and a time stamp, and may be encrypted utilizing an on-chip combinatorial function.