发明授权
US5897218A Signal recording/reproducing method and apparatus in which key
information for descrambling is recorded in an area on the signal
recording medium
失效
信号记录/再现方法和设备，其中用于解扰的密钥信息被记录在信号记录介质上的区域中
- 专利标题： Signal recording/reproducing method and apparatus in which key information for descrambling is recorded in an area on the signal recording medium
- 专利标题（中）： 信号记录/再现方法和设备，其中用于解扰的密钥信息被记录在信号记录介质上的区域中
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申请号： US867516申请日： 1997-06-02
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公开(公告)号： US5897218A公开(公告)日： 1999-04-27
- 发明人: Keizo Nishimura , Takao Arai
- 申请人： Keizo Nishimura , Takao Arai
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX6-020867 19940218
- 主分类号： H04N5/91
- IPC分类号： H04N5/91 ; G06F21/10 ; G06F21/62 ; H04N5/92 ; H04N5/926 ; H04N7/16 ; H04N7/167 ; H04N21/41 ; H04N21/433 ; H04N21/4405 ; H04N5/76
摘要：
By receiving a key signal for descrambling before reproducing a program signal so as to record the scrambled program signal as it is and descramble and view it by a decoder at the time of reproducing or by reading and reproducing the record, a signal recording/reproducing method and apparatus therefor wherein a possibility that a program which is distributed for specified viewers with payment is viewed by the public at an optional location without payment is eliminated and on the other hand, a viewer can view a broadcasted program freely at any time he wants is provided.
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