发明名称 |
Digital radio prepaid music recording system |
摘要 |
A device for prepaid recording of digital audio signals. In a system where digital radio signals are received in an encoded format, a digital converter that is enabled by a smartcard module is employed to convert encoded digital signals to decoded digital signals for recording onto a digital storage media. A smartcard having a prepaid account balance is employed to authorize and control the recording of digital signals. A buffer is advantageously employed to store a quantity of digital signals prior to recording.
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申请公布号 |
US6563805(B1) |
申请公布日期 |
2003.05.13 |
申请号 |
US19990434751 |
申请日期 |
1999.11.05 |
申请人 |
XM SATELLITE RADIO, INC. |
发明人 |
MA HIEN DUC;CHATZIPETROS ARGYRIOS A. |
分类号 |
G07F7/00;G07F7/02;G07F17/16;G07F17/28;(IPC1-7):H04B7/204 |
主分类号 |
G07F7/00 |
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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