公开(公告)号：US20020059647A1

公开(公告)日：2002-05-16

申请号：US09960135

申请日：2001-09-21

Applicant: PACE MICRO TECHNOLOGY PLC.

Inventor： Mark Newton

IPC: H04N007/16

CPC classification number: H04N5/76 ,  H04N5/4401 ,  H04N5/781 ,  H04N21/42607 ,  H04N21/42661 ,  H04N21/4348

Abstract: 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 color sub-carrier 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.

Abstract translation: 提供了一种广播数据接收机（BDR），以及使用该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从广播公司接收视频，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的参考控制值，或者可以通过将VCXO的频率锁定到空中输入数据流来导出一个或多个值。