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1. 发明授权

US06834384B2 Methods and apparatus for upgrading firmware in an embedded system 失效
标题翻译：用于升级嵌入式系统固件的方法和装置
公开(公告)号：US06834384B2
公开(公告)日：2004-12-21
申请号：US09808370
申请日：2001-03-14
申请人： Daniel Charles Fiorella, III , Ronald L. Gebhardt, Jr. , Marlin F. McGregor, Jr.
发明人： Daniel Charles Fiorella, III , Ronald L. Gebhardt, Jr. , Marlin F. McGregor, Jr.
IPC分类号： G06F944
CPC分类号： G06F8/656
摘要： The present invention provides methods and apparatus for upgrading firmware in an embedded system, without impacting the system. More specifically, the present invention enables an embedded system to be upgraded without any system downtime, by providing two application areas in non-volatile programmable read only memory. A processor can boot up and run from either application area. A fixed vector table is provided, which, in cooperation with a software vector table, enables the processor to maintain proper interrupt vector addresses while being able to run from either application area. Upgraded firmware can be loaded into one application area while the system is running from the other application area. Resetting the processor allows the system to run the upgraded version of firmware.
摘要翻译：本发明提供了在不影响系统的情况下升级嵌入式系统中的固件的方法和装置。更具体地说，通过在非易失性可编程只读存储器中提供两个应用区域，本发明使嵌入式系统能够在没有任何系统停机的情况下升级。处理器可以从任一应用程序区域启动并运行。提供了一个固定向量表，它与软件向量表配合使得处理器能够在能够从任一应用程序区域运行的同时保持适当的中断向量地址。升级的固件可以在系统从其他应用程序区域运行时加载到一个应用程序区域。重置处理器允许系统运行升级版本的固件。

2. 发明授权

US06567132B1 Upconverter for a television signal headend distribution center handling analog and digital signals and method of making and using the same 有权
标题翻译：上变频器用于电视信号头端分配中心处理模拟和数字信号及其制作和使用方法
公开(公告)号：US06567132B1
公开(公告)日：2003-05-20
申请号：US09265814
申请日：1999-03-10
申请人： Donald E. Groff , Marlin F. McGregor, Jr.
发明人： Donald E. Groff , Marlin F. McGregor, Jr.
IPC分类号： H04N538
CPC分类号： H04N5/46 , H04J1/06 , H04N5/40 , H04N5/4401 , H04N5/4446 , H04N7/0803 , H04N7/10
摘要： An upconverter for converting IF television signals to VHF or UHF signals prior to broadcast is configured to process either analog or digital television signals. The upconverter identifies the type of incoming television signal and generates an appropriate reference signal depending on whether the incoming television signal is digital or analog. In an analog format, the reference signal is used by the modulator generating the IF signal to synchronize phase with the signals output by various other upconverters. In a digital format, the reference signal is used, for example, as a test signal for the upconversion circuit.
摘要翻译：用于在广播之前将IF电视信号转换为VHF或UHF信号的上变频器被配置为处理模拟或数字电视信号。上变频器识别输入电视信号的类型，并根据输入的电视信号是数字还是模拟产生适当的参考信号。在模拟格式中，参考信号由生成IF信号的调制器使用，以使其与各种其它上变频器输出的信号同步。在数字格式中，参考信号例如用作上变频电路的测试信号。

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