发明授权
US6112008A Duplication control system using two differently generated control
signals superimposed on the information signal
失效
复制控制系统使用两个不同的生成的控制信号叠加在信息信号上
- 专利标题： Duplication control system using two differently generated control signals superimposed on the information signal
- 专利标题（中）： 复制控制系统使用两个不同的生成的控制信号叠加在信息信号上
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申请号： US968119申请日： 1997-11-12
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公开(公告)号： US6112008A公开(公告)日： 2000-08-29
- 发明人: Takehiro Sugita , Akira Ogino , Takashi Usui
- 申请人： Takehiro Sugita , Akira Ogino , Takashi Usui
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-322330 19961118
- 主分类号： G06F21/10
- IPC分类号： G06F21/10 ; G11B20/00 ; G11B20/10 ; H04N5/91 ; H04N5/913 ; H04N7/08 ; H04N7/081 ; H04N7/167 ; H04N7/171 ; H04N21/435 ; H04N21/442 ; H04N21/8355
摘要：
The invention intends to reliably the control of duplicating information signals. In the duplication control method according to the invention, a main information signal containing a duplication control information transformed into a spread spectrum signal to be superimposed and a duplication control information superimposed by a processing different from the spectrum spreading is transmitted. The duplication control information transformed into a spread spectrum signal is extracted from the main information signal by reverse spectrum spreading, and the duplication control information superimposed by the different processing is extracted from the main information signal. Information closest to duplication prohibition is selected as an output duplication control information out of the plural extracted duplication control information. On the basis of the selected output duplication control information, the main information signal is controlled on duplication.