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公开(公告)号：US4849688A
公开(公告)日：1989-07-18
申请号：US247049
申请日：1988-09-16
IPC分类号： H04Q1/448
CPC分类号： H04Q1/448
摘要： Apparatus for detecting a single-frequency signal having a predetermined frequency in an analog signal includes means for converting the analog signal to a differentially encoded digital signal and detection means for detecting a single-frequency signal having the predetermined frequency from the differentially encoded digital signal. In a preferred embodiment, the detection means includes: means for detecting one cycle of the analog signal by detecting a signal maximum followed by detecting a signal minimum which is followed, in turn, by detecting another signal maximum; means for determining the length of the cycle, for determining whether the length is within predetermined bounds, and for keeping a count of such occurrences; and means for determining whether the count has reached a predetermined amount, whereby a single-frequency signal having the predetermined frequency has been detected.
摘要翻译： 用于在模拟信号中检测具有预定频率的单频信号的装置包括用于将模拟信号转换为差分编码数字信号的装置和用于从差分编码数字信号检测具有预定频率的单频信号的检测装置。 在优选实施例中，检测装置包括：用于通过检测信号最大值检测模拟信号的一个周期的装置，随后检测信号最小值，依次检测另一信号最大值; 用于确定所述周期的长度的装置，用于确定所述长度是否在预定范围内，以及用于保持此类事件的计数; 以及用于确定计数是否已经达到预定量的装置，由此已经检测到具有预定频率的单频信号。
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2.发明授权Techniques to reduce information loss and translation costs in a system populated with data sources and sinks communicating with multiple data representations 失效减少信息丢失和翻译成本的技术，其中填充有与多个数据表示通信的数据源和接收器公开(公告)号：US07372871B2
公开(公告)日：2008-05-13
申请号：US10112279
申请日：2002-03-27
申请人： Joseph J. Grecco , Paul B. Ranford
发明人： Joseph J. Grecco , Paul B. Ranford
IPC分类号： H04J3/18
摘要： Techniques for reducing overall information loss and processing costs due to data translation in a network populated with communicating data sources and sinks of multiple data representations is described. By employing an “optimization” technique for negotiating “least cost” data representations to be communicated between data source(s) and sink(s) where the “least cost” can be relative to, for example, fidelity requirements and processing costs of the system or the user of the system.
摘要翻译： 描述了用网络中的数据转换来减少总体信息丢失和处理成本的技术，该网络填充有多个数据表示的通信数据源和汇点。 通过采用“优化”技术来协商“数据源”和“数据源”之间的“最小成本”数据表示，“最小成本”可以相对于例如保真度要求和 系统或系统的用户。
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