发明授权
- 专利标题： Method and apparatus for broadcasting data with access control
- 专利标题（中）： 用于通过访问控制广播数据的方法和装置
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申请号： US09293079申请日： 1999-04-16
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公开(公告)号： US06473858B1公开(公告)日： 2002-10-29
- 发明人: Tsutomu Shimomura , Steve Waltman , Mark Peting , Castor Fu , Dag H. Johansen , Geoff Mulligan
- 申请人： Tsutomu Shimomura , Steve Waltman , Mark Peting , Castor Fu , Dag H. Johansen , Geoff Mulligan
- 主分类号： G06F124
- IPC分类号： G06F124
摘要：
A data broadcasting system is disclosed. The data broadcasting system operates by receiving source material from a number of different sources. The source material is processed by performing adding error correction encoding and in some cases, encryption. The source material from the different sources is then multiplexed together and broadcast on a broadcast medium. The multiplexed digital broadcast is received by a plurality of receiver systems. The receiver systems demultiplex the multiplexed digital stream to obtain desired digital streams. The desired streams are then decrypted if necessary.