发明名称 |
Information output device, information recording device, information duplication control system and recording medium of the same |
摘要 |
The invention intends to secure 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 the reverse spectrum spreading, and the duplication control information superimposed by the different processing is extracted from the main information signal. One information most 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.
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申请公布号 |
US6381402(B1) |
申请公布日期 |
2002.04.30 |
申请号 |
US20000636204 |
申请日期 |
2000.08.10 |
申请人 |
SONY CORPORATION |
发明人 |
SUGITA TAKEHIRO;OGINO AKIRA;USUI TAKASHI |
分类号 |
H04N7/171;G11B20/00;G11B20/10;H04N5/91;H04N5/913;H04N7/08;H04N7/081;H04N7/167;(IPC1-7):H04N5/91 |
主分类号 |
H04N7/171 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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