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公开(公告)号：US4755871A
公开(公告)日：1988-07-05
申请号：US934866
申请日：1986-11-25
CPC分类号： H04N7/17309 , H04H20/72 , H04H60/33 , H04H60/90 , H04N2007/17372
摘要： In a TV answer back system where many receiver stations communicate with a TV transmitter station by means of rf pulses generated by rf oscillators at the receiver station, the requirement for keeping all oscillators on frequency is achieved without crystal temperature control by automatically controlling the rf oscillator frequency using synchronization signals carried in the video signal received from the TV studio. By this invention it has been possible to control the frequency of multiple megahertz oscillator as accurately as desired from relatively low frequency synchronizing signals such as the vertical and horizontal video sync pulses. Thus an oscillations counter is gated for a very accurate time period by the sync pulses, and the oscillation count is compared with a datum count representing the desired oscillation frequency. The requirement to prevent receiver stations from answering with rf pulses in response to queries contained in home video recordings of previously broadcast signals is achieved by encoding broadcast time on all query containing TV transmissions, and by comparing at receiver stations broadcast time information from received signal with time from a local battery backed clock contained at each receiver station, thus discrimination of video recordings is possible by comparing received video broadcast time with local time.
摘要翻译： 在电视应答系统中，许多接收机站通过在接收站的rf振荡器产生的rf脉冲与电视发射台进行通信，通过自动控制射频振荡器来实现保持所有振荡器频率的要求，而不需要晶体温度控制 频率使用从电视演播室接收的视频信号中携带的同步信号。 通过本发明，可以从诸如垂直和水平视频同步脉冲的相对低频同步信号中精确地控制多兆赫兹振荡器的频率。 因此，振荡计数器通过同步脉冲选通非常精确的时间周期，并且将振荡计数与表示期望的振荡频率的数据计数进行比较。 通过在包含TV传输的所有查询上对广播时间进行编码，并且通过在接收站处对来自接收信号的广播时间信息进行比较来实现，以响应于先前广播信号的家庭视频记录中包含的查询来防止接收站应答rf脉冲的要求 从每个接收站处包含的本地电池支持的时钟的时间，因此通过将接收到的视频广播时间与当地时间进行比较来识别视频记录。
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公开(公告)号：US4591906A
公开(公告)日：1986-05-27
申请号：US739083
申请日：1985-05-29
CPC分类号： H04N7/17309 , H04H60/33 , H04H60/44 , H04H60/90 , H04N21/4758 , H04N21/6112 , H04N21/6162 , H04N7/002 , H04N7/085 , H04N2007/17372
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.
摘要翻译： 查询信号通过无线方式从电视台传输到电视机。 接收机位置处的响应单元具有无线电频率发射器发送对在T.V.信号的水平线上发送的站查询的响应，在受控时间标识每个站。 该响应是与T.V.信号同步的简单的r-f蜂鸣声，使得每个发送器仅在其唯一的时隙中发出蜂鸣声。 简化的响应单元被调谐到T.V.集合的标准中间频率，因此不需要被连线并且不需要具有频道选择器。
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3.发明授权Central data processing station for satellite communication with local area audience response station 失效中央数据处理站，用于与当地观众响应台进行卫星通信
公开(公告)号：US5257099A
公开(公告)日：1993-10-26
申请号：US741249
申请日：1991-07-26
CPC分类号： H04H20/18 , H04H20/33 , H04H60/90 , H04N21/2543 , H04N21/4722 , H04N21/47805 , H04N21/812 , H04N7/03 , H04N7/0882 , H04N7/0884 , H04N7/17309
摘要： A network of local area audience response systems is coupled together at a central audience response processing station by a satellite communication system for real time audience response analysis, nationally or internationally. Each local area station and each response unit may be identified and verified by allocation of specific time slots for response preferably synchronously related to a TV picture program transmission carrying the audience questions to be answered. Wireless transmission of the question and answer signals in digital format of beeps of a single frequency keeps transmission channels narrow. The system may be operated in conjunction with TV broadcasting or independently.
摘要翻译： 本地区域听众响应系统的网络由卫星通信系统在中央听众响应处理站耦合在一起，用于全国或国际上的实时观众响应分析。 可以通过分配用于响应的特定时隙来识别和验证每个局域站和每个响应单元，优选地同时涉及携带要回答的观众问题的电视图像节目传输。 数字格式的单频哔声的问答信号的无线传输使传输通道变窄。 该系统可以与TV广播或独立地一起操作。
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4.发明授权公开(公告)号：US11129011B2
公开(公告)日：2021-09-21
申请号：US17112800
申请日：2020-12-04
摘要： A smart cellphone application is used as sound pressure level meter for determining if ambient noise infringes the legal limit, and sends evidence to prove the infringement to the law enforcement agency. The application play in the speaker at least one reference burst tone, and use Fast Fourier Transform (FFT) to achieve the mentioned functionality.
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5.发明授权Cellular repeater stations in a wireless audience response system for satellite communication 失效用于卫星通信的无线听众响应系统中的蜂窝中继站
公开(公告)号：US5223923A
公开(公告)日：1993-06-29
申请号：US741250
申请日：1991-07-26
CPC分类号： H04H20/18 , H04H20/33 , H04H60/90 , H04N21/2543 , H04N21/4722 , H04N21/47805 , H04N21/812 , H04N7/03 , H04N7/0882 , H04N7/0884 , H04N7/17309
摘要： A network of local area audience response systems is coupled together at a central audience response processing station by means of a satellite communication system for real time audience response analysis, nationally or internationally. Each local area station and each response unit may be identified and verified by allocation of specific time slots for response, preferable synchronously related to a TV picture program transmission carrying the audience questions to be answered. Wireless transmission of the question and answer signals in digital format of beeps of a single frequency keep transmission channels narrow. The system may be operated in conjunction with TV broadcasting or independently.
摘要翻译： 本地区域听众响应系统的网络通过卫星通信系统在中央听觉响应处理站耦合在一起，用于全国或国际上的实时观众响应分析。 可以通过分配用于响应的特定时隙来识别和验证每个局域站和每个响应单元，优选地与携带有要回答的观众问题的电视图像节目传输同步相关。 无线传输问题和应答信号以数字格式的单频哔哔声保持传输通道狭窄。 该系统可以与TV广播或独立地一起操作。
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6.发明授权Wide area real-time T-V audience polling system with local area stations linked by satellite 失效广域实时T-V观众轮询系统，与卫星连接的局域站
公开(公告)号：US5101267A
公开(公告)日：1992-03-31
申请号：US390073
申请日：1989-08-07
IPC分类号： H04H1/00 , H04H20/38 , H04H60/33 , H04H60/45 , H04N7/03 , H04N7/088 , H04N7/173 , H04N21/2543 , H04N21/4722 , H04N21/478 , H04N21/81
CPC分类号： H04H60/33 , H04H20/38 , H04N21/2543 , H04N21/4722 , H04N21/47805 , H04N21/812 , H04N7/03 , H04N7/0882 , H04N7/0884 , H04N7/17309 , H04H20/06 , H04H60/45
摘要： A network of local area audience response systems is coupled together at a central audience response processing station by means of a satellite communication system for real time audience response analysis, nationally or internationally. Each local area station and each response unit may be identified and verified by allocation of specific time slots for response, preferable synchronously related to a TV picture program transmission carrying the audience questions to be answered. Wireless transmission of the question and answer signals in digital format of beeps of a single frequency keep transmission channels narrow. The system may be operated in conjunction with TV broadcasting or independently.
摘要翻译： 本地区域听众响应系统的网络通过卫星通信系统在中央听觉响应处理站耦合在一起，用于全国或国际上的实时观众响应分析。 可以通过分配用于响应的特定时隙来识别和验证每个局域站和每个响应单元，优选地与携带有要回答的观众问题的电视图像节目传输同步相关。 无线传输问题和应答信号以数字格式的单频哔哔声保持传输通道狭窄。 该系统可以与TV广播或独立地一起操作。
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