发明名称 |
Method of modifying pseudo-random sequences and device for scrambling or descrambling information components |
摘要 |
For dynamically modifying pseudo-random sequences of a pseudo-random sequence generator which is re-initialized at each start of the packet of information components, the information component itself is derived, delayed and combined with one of the series of bits present in the pseudo-random sequence generator. After having delayed the derived information component by a given delay (20), the component is modified by passing it through an EXCLUSIVE-OR gate (23) and by delaying the output signal of said gate with a delay (21) equal to that (20) used for said derived information component, and by feeding it back to the input of the gate.
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申请公布号 |
US5351300(A) |
申请公布日期 |
1994.09.27 |
申请号 |
US19930087647 |
申请日期 |
1993.07.06 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
QUISQUATER, JEAN-JACQUES;RAKHODAI, ISSA |
分类号 |
G09C1/00;H04L9/22;H04N7/167;H04N7/169;(IPC1-7):H04L9/00 |
主分类号 |
G09C1/00 |
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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