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1. 发明公开

EP1191787A1 Broadcast data receiver and method of use thereof 有权
标题翻译： Rundfunkdatenempfängerund Verfahren zu seiner Verwendung
公开(公告)号：EP1191787A1
公开(公告)日：2002-03-27
申请号：EP01122497.9
申请日：2001-09-20
申请人： Pace Micro Technology PLC
发明人： Newton, Mark
IPC分类号： H04N5/44 , H04N5/935
CPC分类号： H04N5/76 , H04N5/4401 , H04N5/781 , H04N21/42607 , H04N21/42661 , H04N21/4348
摘要： A broadcast data receiver (BDR) is provided and a method of using the BDR for the production of a pseudo stable reference control for the reliable generation of composite video signals. The BDR receives video, audio and/or auxiliary data from a broadcaster can stored a part of all of the data in storage means, typically in the form of a hard disk drive. When the BDR is deriving video data from the hard disk due to the BDR being disconnected from the signal feed from the broadcaster, the BDR uses a pseudo stable reference produced by deriving one or more values from stable frequency information embedded in incoming data. The pseudo stable reference is used to control the frequency of a VCXO in the BDR, thereby allowing accurate colour subcarrier frequency generation for the generation of a final video output. The one or more values can be average stable reference control values extracted from the incoming data or the one or more values can be derived from locking the frequency of the VCXO to an off air incoming data stream.
摘要翻译：提供广播数据接收机（BDR）以及使用BDR制作伪稳定参考控制以便可靠地生成复合视频信号的方法。 BDR从广播者接收视频，音频和/或辅助数据可以将存储装置中的所有数据的一部分存储，通常以硬盘驱动器的形式存储。当BDR由于BDR与来自广播者的信号馈送断开而从硬盘导出视频数据时，BDR使用通过从输入数据中嵌入的稳定频率信息导出一个或多个值而产生的伪稳定参考。伪稳定参考用于控制BDR中的VCXO的频率，从而允许精确的彩色副载波频率产生用于产生最终的视频输出。一个或多个值可以是从输入数据提取的平均稳定参考控制值，或者可以从VCXO的频率锁定到空中输入数据流中导出一个或多个值。

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