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Method and apparatus for recording and reproducing electronic watermark information, and recording medium 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G06K-009/00
출원번호 US-0984029 (2001-10-26)
우선권정보 JP-0238029 (1997-09-03)
발명자 / 주소
  • Kimura, Hiroyuki
  • Arai, Takao
  • Takeuchi, Toshifumi
  • Yoshiura, Hiroshi
출원인 / 주소
  • Hitachi, Ltd.
대리인 / 주소
    Antonelli, Terry, Stout & Kraus, LLP
인용정보 피인용 횟수 : 11  인용 특허 : 137

초록 ▼

When a video signal having electronic watermark information embedded therein is recorded on a recording medium, a reference signal is inserted in the video signal at a position different from a position of embedment of the electronic watermark information. The electronic watermark information is emb

대표청구항 ▼

When a video signal having electronic watermark information embedded therein is recorded on a recording medium, a reference signal is inserted in the video signal at a position different from a position of embedment of the electronic watermark information. The electronic watermark information is emb

이 특허에 인용된 특허 (137)

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  10. Zhao, Jian; Picard, Justin; Thorwirth, Niels, Visible authentication patterns for printed document.
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  11. Zhao, Jian; Picard, Justin; Thorwirth, Niels, Visible authentication patterns for printed document.
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