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1. 发明申请

WO1997003523A1 SELECTIVE INTERDICTION OF TELEVISION CHANNELS 审中-公开
标题翻译：电视频道的选择性界限
公开(公告)号：WO1997003523A1
公开(公告)日：1997-01-30
申请号：PCT/US1995016827
申请日：1995-12-21
申请人： CALIFORNIA AMPLIFIER
发明人： CALIFORNIA AMPLIFIER , MILIANI, Pablo , PETREE, David, L. , LIE, Yat, Sen
IPC分类号： H04N07/167
CPC分类号： H04N7/1713 , H04N7/165 , H04N7/1675 , H04N7/171
摘要： With the present decoder/interdiction device combination (566), the microcontroller (518) receives authorization data from a data receiver (568) via its data output (570) that has been inserted at the headend to identify authorized subscribers (preferably identified with a predefined subscriber or box code in the microcontroller (518). The same microcontroller (518) that controls the common decrypting of a commonly encrypted input source (572), loads the channel interdiction table (516) according to the authorization data, e.g., according to tiers. The data in the interdiction table (516) is then used to control the operation of the frequency synthesizer/VCO (516) and the mute switch (522) using the control interface (528) and mute control signal (534) according to the previously described algorithm. This improved combination now permits the simultaneous reception of multiple unencrypted signals (suitable for picture-in-picture use) while still permitting the provider to withhold access to selected channels.
摘要翻译：利用本解码器/截断装置组合（566），微控制器（518）经由其数据输出（570）从数据接收器（568）接收授权数据，该数据输出（570）已经插入到头端以识别授权订户（优选地以控制共同加密的输入源（572）的公共解密的相同微控制器（518）根据授权数据加载信道停止表（516），例如根据然后，截断表（516）中的数据用于使用控制接口（528）和静音控制信号（534）来控制频率合成器/ VCO（516）和静音开关（522）的操作，并根据这种改进的组合现在允许同时接收多个未加密的信号（适合于画中画使用），同时仍然允许提供商扣留 s到选定的频道。

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