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US07409556B2 Hybrid digital watermarking for video authentication 失效
用于视频认证的混合数字水印

Hybrid digital watermarking for video authentication
摘要:
A hybrid digital watermarking system for video authentication includes an authenticated acquisition subsystem for digitally watermarking video data and a video management subsystem in signal communication with the authenticated acquisition subsystem for verifying the digitally watermarked video data, where the authenticated acquisition subsystem may include a watermarking device for applying each of an identity signature and a control signature to the video data within a hybrid digital watermark, and the hybrid digital watermark may achieve progressively varying robustness by means of error-correcting signature coding and/or rate-distortion guided bit embedding.
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