发明名称 |
CATV pay per view interdiction system method and apparatus |
摘要 |
Off-premises cable television pay per view apparatus is coupled between first and second diplexers of off-premises subscriber service providing equipment. The diplexers separate the transmission path between a headend and a subscriber into downstream or forward and upstream or reverse transmission paths. A radio frequency transmitter is coupled between a controller and the upstream diplexer which may actuate a selected one of a plurality of data channels in the notoriously noisy subsplit 5-30 megahertz transmission spectrum for reporting billable events. On-premises equipment is minimized to comprise only a unidirectional data transmitter. The data transmission is sent repetitively over a predetermined period of time before the data transmitter, comprising a microprocessor, turns itself off to conserve power. Thus, data transmitted from the subscriber in a first format is received at off-premises equipment, service is authorized there if appropriate, and then data is transmitted over a data channel selected so as to avoid noisy portions of the spectrum in a second format to a headend.
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申请公布号 |
US5505901(A) |
申请公布日期 |
1996.04.09 |
申请号 |
US19940218037 |
申请日期 |
1994.03.25 |
申请人 |
SCIENTIFIC-ATLANTA, INC. |
发明人 |
HARNEY, MICHAEL P.;PARIKH, HIMANSHU R.;WEST, JR., LAMAR E.;FARMER, JAMES O.;SCHUTTE, MARK E. |
分类号 |
H04H20/78;H04H60/97;H04N7/16;(IPC1-7):H04N7/10 |
主分类号 |
H04H20/78 |
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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