发明名称 |
Automatic homing system for a subscription television signal decoder |
摘要 |
An automatic homing system for a subscription television signal decoder comprises a tuning system responsive to a decoder off-command signal for operation in a search mode wherein successive television channels are sequentially tuned until a subscription television signal is detected. As a result, the memory circuits of the decoder may be refreshed with updated subscriber authorization data in response to a transmitted subscription television signal even though the decoder is turned off.
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申请公布号 |
US4503462(A) |
申请公布日期 |
1985.03.05 |
申请号 |
US19810312040 |
申请日期 |
1981.10.16 |
申请人 |
ZENITH ELECTRONICS CORPORATION |
发明人 |
KELLY, GORDON E.;MERRELL, RICHARD G.;NAKANISHI, MUTSUO |
分类号 |
H04N7/167;(IPC1-7):H04N7/16;H04K1/04 |
主分类号 |
H04N7/167 |
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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