发明名称 |
WIRELESS TRANSMISSION FROM THE TELEVISION SET TO THE TELEVISON STATION |
摘要 |
Query signals are transmitted by wireless means from the television station to the television set. Response units at receiver locations have a radio frequency transmitter send a response to the station inquiry sent on horizontal lines of the T.V. signal at controlled times identifying each station. This response is a simple r-f beep synchronized with the T.V. signal, in such a way that each set transmitter emits the beep only in its unique time slot. Simplified response units are tuned to the standard intermediate frequency of the T.V. sets and thus need not be wired in and need not have a channel selector. |
申请公布号 |
EP0232446(B1) |
申请公布日期 |
1992.04.22 |
申请号 |
EP19860101763 |
申请日期 |
1986.02.12 |
申请人 |
TV ANSWER INTERNATIONAL, INC. |
发明人 |
MORALES-GARZA, FERNANDO;MORALES-GARZA, OSCAR;ORTIZ-SALINAS, JORGE E. |
分类号 |
H04H60/33;H04H60/44;H04H60/90;H04N7/00;H04N7/085;H04N7/173 |
主分类号 |
H04H60/33 |
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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