CN101001393A - 卫星数字电视入侵检测方法和设备 - Google Patents
卫星数字电视入侵检测方法和设备 Download PDFInfo
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- CN101001393A CN101001393A CN 200610023213 CN200610023213A CN101001393A CN 101001393 A CN101001393 A CN 101001393A CN 200610023213 CN200610023213 CN 200610023213 CN 200610023213 A CN200610023213 A CN 200610023213A CN 101001393 A CN101001393 A CN 101001393A
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Abstract
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入侵状态 | 信号状态 |
可能入侵 | 1电平不变,信噪比大幅度下降,下降幅度超过第二下降幅值L2。(对应入侵前期阶段) |
2电平很大,大于第二上限U2但信噪比很低,低于下限D1。(对应入侵中期阶段) | |
3电平大幅度增加,增幅超过第二上升幅值R2,信噪比无明显上升,且原信噪比不是很大。(对应入侵后期阶段) | |
4电平猛然大幅度增加,增幅超过第三上升幅值R3。(对应入侵信号猛然大幅度增强的情况) | |
入侵 | 1电平很大,大于第一上限U1,但高频头仍然处于失锁状态。(对应入侵中期阶段) |
2电平增幅超过第一上升幅值R1,信噪比降低幅度超过第一下降幅值L1。(对应入侵前期和中期阶段) |
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CN200610023213A CN101001393B (zh) | 2006-01-12 | 2006-01-12 | 卫星数字电视入侵检测方法和设备 |
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CN101001393A true CN101001393A (zh) | 2007-07-18 |
CN101001393B CN101001393B (zh) | 2010-05-12 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109788259A (zh) * | 2018-12-06 | 2019-05-21 | 安徽站乾科技有限公司 | 一种高频头自动切换卫星电视的方法及系统 |
CN110996076A (zh) * | 2019-12-20 | 2020-04-10 | 电子科技大学 | 一种卫星电视信号异常告警方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104270633B (zh) * | 2013-06-08 | 2016-05-04 | 青岛橡胶谷知识产权有限公司 | 卫星数字电视节目播放质量检测系统 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN1395425A (zh) * | 2002-08-09 | 2003-02-05 | 顾士平 | 模拟、数字、网络广播电视节目监控系统实现方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109788259A (zh) * | 2018-12-06 | 2019-05-21 | 安徽站乾科技有限公司 | 一种高频头自动切换卫星电视的方法及系统 |
CN110996076A (zh) * | 2019-12-20 | 2020-04-10 | 电子科技大学 | 一种卫星电视信号异常告警方法 |
CN110996076B (zh) * | 2019-12-20 | 2021-10-15 | 电子科技大学 | 一种卫星电视信号异常告警方法 |
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