发明名称 |
Video signal scrambling and descrambling apparatus |
摘要 |
A common circuit is used for scrambling and descrambling video signals. A memory stores key data. During scrambling the output of the memory is transmitted to a read address counter through an address generating circuit. Scrambling is effected by executing line rotation from a cut point. Descrambling is effected by the reverse of the aforementioned process.
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申请公布号 |
US5488658(A) |
申请公布日期 |
1996.01.30 |
申请号 |
US19940228220 |
申请日期 |
1994.04.15 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
HIRASHIMA, MASAYOSHI |
分类号 |
H04N7/169;(IPC1-7):H04N7/167;H04L9/02 |
主分类号 |
H04N7/169 |
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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