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1. 发明授权

US5319709A System for broadband descrambling of sync suppressed television signals 失效
标题翻译：用于同步抑制电视信号的宽带解扰系统
公开(公告)号：US5319709A
公开(公告)日：1994-06-07
申请号：US715080
申请日：1991-06-13
申请人： James E. Raiser , Julius B. Bagley , Michael T. Hayashi , Michael P. Harney , James O. Farmer , Kinney C. Bacon , Alex M. Cook, Jr.
发明人： James E. Raiser , Julius B. Bagley , Michael T. Hayashi , Michael P. Harney , James O. Farmer , Kinney C. Bacon , Alex M. Cook, Jr.
IPC分类号： H04N7/171 , H04N7/167
CPC分类号： H04N7/1713
摘要： A television system having sync suppression scrambling and descrambling which includes in band and out of band signaling methods. The in band signaling method modulates the IF sound carrier of a premium video channel with timing and data pulses while the out of band signaling method modulates the previously modulated IF sound on a separate carrier onto a separate out of band data carrier. The in band signaling method uses a descrambler which tunes a channel before demodulating the timing and data pulses from the sound carrier while the out of band signaling method tunes a selected data carrier to demodulate the timing and data pulses. In both methods, the timing pulses are used to restore the levels of the synchronization pulses in the sync suppressed video signal, and thus descramble the signal, while the data pulses are used for addressable messaging to the descrambler including authorization. The out of band descrambler provides broadband sync restoration for a particular channel and thus does not need a broadband tuner for the video signal.
摘要翻译：具有同步抑制加扰和解扰的电视系统，其包括频带和带外信令方法。带内信令方法利用定时和数据脉冲调制高级视频信道的IF声音载波，而带外信令方法将单独载波上的先前调制的IF声音调制到单独的带外数据载体上。带内信令方法使用解扰器，其在解调来自声载波的定时和数据脉冲之前调谐信道，而带外信令方法调谐所选择的数据载波以解调定时和数据脉冲。在两种方法中，定时脉冲用于恢复同步抑制的视频信号中的同步脉冲的电平，并且因此使信号解扰，同时数据脉冲用于包括授权的解扰器的可寻址消息传递。带外解扰器为特定信道提供宽带同步恢复，因此不需要用于视频信号的宽带调谐器。

2. 发明授权

US06622308B1 Automatic digital television (DTV) bypass for a CATV converter using a CATV tuner 有权
标题翻译：使用CATV调谐器的CATV转换器的自动数字电视（DTV）旁路
公开(公告)号：US06622308B1
公开(公告)日：2003-09-16
申请号：US09274643
申请日：1999-03-23
申请人： James E. Raiser
发明人： James E. Raiser
IPC分类号： H04N716
CPC分类号： H04N7/106 , H04N5/4401 , H04N5/46 , H04N21/42638 , H04N21/6118
摘要： A cable converter box is a capable of receiving a cable signal that includes both NTSC and digital television (DTV) formatted signals. When the converter box is tuned to a channel, the converter box determines whether the channel carries an NTSC or DTV signal. If the signal is NTSC, the signal passes through an up/down converter, is demodulated in a conventional manner, and is remodulated in order to be provided to the TV on a pre-selected channel. If the signal is DTV, the signal passes through the up/down converter, but not through the demodulator, prior to being output to a DTV-compatible TV on the same pre-selected channel as the NTSC signal. This prevents the user from having to change the tuner on the TV when the cable converter is changed to a DTV channel.
摘要翻译：电缆转换盒能够接收包括NTSC和数字电视（DTV）格式信号的电缆信号。当转换器盒被调谐到通道时，转换器盒决定通道是否携带NTSC或DTV信号。如果信号为NTSC，则信号通过上/下转换器，以常规方式进行解调，并且被重新调制以便在预先选择的频道上提供给TV。如果信号为DTV，则信号在与NTSC信号相同的预选通道输出到与DTV兼容的电视机之前通过上/下转换器，但不能通过解调器。这样当电缆转换器变为数字电视频道时，可防止用户在电视机上更换调谐器。

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