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热词
    • 57. 发明授权
    • Reproduction apparatus and decoding apparatus
    • 再现装置和解码装置
    • US06882728B1
    • 2005-04-19
    • US09392564
    • 1999-09-09
    • Masaru TakahashiToshifumi TakeuchiOsamu Kawamae
    • Masaru TakahashiToshifumi TakeuchiOsamu Kawamae
    • G09C3/00G11B20/10H04N5/93H04N7/167
    • H04N5/913H04N5/85H04N9/8042H04N2005/91335H04N2005/91364
    • Information or contents cannot be reproduced even from a regular storage medium which is encrypted in accordance with a predetermined encryption system, due to erroneous detection of watermarks.Detection of the watermarks and restriction over reproduction depending thereon is conducted only in a case where the medium is not encrypted. In case of detecting that the data is not encrypted in accordance with a predetermined encryption system by an encryption detection circuit (10) and when the watermarks are detected by a watermark detection circuit (20), reproduction of the data is stopped by a reproduction restricting circuit (30). In a case that it is detected to be encrypted in the predetermined encryption system by the encryption detection circuit (10), the reproduction restricting circuit (30) will not stop the reproduction thereof.
    • 由于水印的错误检测,信息或内容甚至不能由根据预定加密系统加密的常规存储介质再现。 水印的检测和依赖于其的再现的限制仅在介质未加密的情况下进行。 在检测到数据未被加密检测电路(10)根据预定的加密系统进行加密的情况下,并且当水印检测电路(20)检测到水印时,通过再现限制来停止数据的再现 电路(30)。 在通过加密检测电路(10)检测到在预定加密系统中被加密的情况下,再现限制电路(30)将不停止其再现。