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公开(公告)号：US08125988B1
公开(公告)日：2012-02-28
申请号：US11809964
申请日：2007-06-04
CPC分类号： H04L45/00 , H04L29/0653 , H04L49/351 , H04L65/604 , H04L69/22
摘要： A network audio receive terminal. A receive terminal includes a network interface that receives network packets and a network packet scanner coupled to the network interface that sequentially scans received network packets in accordance with scan criteria. A content selector is coupled to the network packet scanner, and selects network packets containing units of audio content from the scanned network packets based on selection criteria, including pertinence data. An audio content processor is coupled to the content selector, and processes the audio content in the selected network packets. The network packets may include directory packets containing audio content addresses, in which case, the content selector further selects directory packets based on selection criteria. An audio packet requestor requests audio packets through the network identified by the audio content addresses that correspond to the selected directory packets.
摘要翻译： 网络音频接收终端。 接收终端包括接收网络分组的网络接口和耦合到网络接口的网络分组扫描器，其根据扫描标准顺序扫描接收到的网络分组。 内容选择器被耦合到网络分组扫描器，并且基于包括针对性数据在内的选择标准从所扫描的网络分组中选择包含音频内容单元的网络分组。 音频内容处理器耦合到内容选择器，并处理所选网络分组中的音频内容。 网络分组可以包括包含音频内容地址的目录分组，在这种情况下，内容选择器基于选择标准进一步选择目录分组。 音频包请求者通过由对应于所选择的目录分组的音频内容地址标识的网络请求音频分组。
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公开(公告)号：US07548735B1
公开(公告)日：2009-06-16
申请号：US11284908
申请日：2005-11-23
CPC分类号： H04B1/1027
摘要： The invention provides an apparatus and a method for determining the frequency of a radio frequency signal. The coherency of a received signal is determined and only the frequency of a coherent signal is determined. Zero amplitude transitions of coherent signals are counted in respective time periods. If the counts in each time period agree within a quantization error, the accumulated counts for a fixed time period are employed to determine a frequency. The frequency determining apparatus and method are particularly useful with a frequency agile radio receiver for detecting the presence of radio frequency signals from nearby mobile and stationary transmitters. Upon determination of the frequency of the nearby transmitter, the channel of transmission can be determined from a memory within the receiver and the receiver can be tuned to monitor the transmission. Additional tests to verify the frequency determination may be applied using squelch and window detector circuits of the radio receiver.
摘要翻译： 本发明提供一种用于确定射频信号的频率的装置和方法。 确定接收信号的一致性，并且仅确定相干信号的频率。 相关信号的零幅度转换在各个时间段内进行计数。 如果每个时间段内的计数在量化误差内同意，则采用固定时间段的累计计数来确定频率。 频率确定装置和方法对于用于检测来自附近移动和固定发射机的射频信号的存在的频率捷变无线电接收机特别有用。 在确定附近发射机的频率时，可以从接收机内的存储器确定传输信道，并且可以调谐接收机来监视传输。 可以使用无线电接收机的静噪和窗口检测器电路来应用用于验证频率确定的附加测试。
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公开(公告)号：US07006797B1
公开(公告)日：2006-02-28
申请号：US09860506
申请日：2001-05-21
CPC分类号： H04B1/1027
摘要： The invention provides an apparatus and a method for determining the frequency of a radio frequency signal. The coherency of a received signal is determined and only the frequency of a coherent signal is determined. Zero amplitude transitions of coherent signals are counted in respective time periods. If the counts in each time period agree within a quantization error, the accumulated counts for a fixed time period are employed to determine a frequency. The frequency determining apparatus and method are particularly useful with a frequency agile radio receiver for detecting the presence of radio frequency signals from nearby mobile and stationary transmitters. Upon determination of the frequency of the nearby transmitter, the channel of transmission can be determined from a memory within the receiver and the receiver can be tuned to monitor the transmission. Additional tests to verify the frequency determination may be applied using squelch and window detector circuits of the radio receiver.
摘要翻译： 本发明提供一种用于确定射频信号的频率的装置和方法。 确定接收信号的一致性，并且仅确定相干信号的频率。 相关信号的零幅度转换在各个时间段内进行计数。 如果每个时间段内的计数在量化误差内同意，则采用固定时间段的累计计数来确定频率。 频率确定装置和方法对于用于检测来自附近移动和固定发射机的射频信号的存在的频率捷变无线电接收机特别有用。 在确定附近发射机的频率时，可以从接收机内的存储器确定传输信道，并且可以调谐接收机来监视传输。 可以使用无线电接收机的静噪和窗口检测器电路来应用用于验证频率确定的附加测试。
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公开(公告)号：US06519472B1
公开(公告)日：2003-02-11
申请号：US09399146
申请日：1999-09-20
IPC分类号： H04B700
CPC分类号： H04W24/00
摘要： A method and apparatus for passively monitoring communications in a trunked communication system. Digital messages transmitted over a control channel at a particular frequency are monitored with a receiver. Transmitted communication signals are demodulated and stored. The stored signals are tested to identify messages and to extract talk group and channel assignment codes. If the talk group is a talk group of interest, the receiver is tuned to the frequency corresponding to the channel assignment code so that voice communications are monitored. The receiver is tuned to the control channel after each voice communication so that a communication including multiple transmissions on different frequencies is coherently monitored by retuning the receiver in accordance with the received channel assignment codes. In an alternative embodiment, separate receivers are provided for the control channel and for voice communications. The voice receiver is continually tuned to different working channels in response to talk group and channel assignment codes extracted from stored information received by the control channel receiver.
摘要翻译： 一种用于被动监测集群通信系统中的通信的方法和装置。 以特定频率通过控制信道发送的数字消息由接收机监视。 发送的通信信号被解调并存储。 测试存储的信号以识别消息并提取通话组和信道分配代码。 如果通话组是感兴趣的通话组，则将接收机调谐到对应于频道分配码的频率，以便监视语音通信。 在每个语音通信之后，接收机被调谐到控制信道，使得通过根据所接收的信道分配码重新接收接收机来相干地监视包括不同频率上的多个传输的通信。 在替代实施例中，为控制信道和语音通信提供单独的接收机。 响应于从由控制信道接收机接收的存储信息中提取的通话组和信道分配码，语音接收器不断地被调谐到不同的工作信道。
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公开(公告)号：US08856267B2
公开(公告)日：2014-10-07
申请号：US11600476
申请日：2006-11-16
CPC分类号： H04L67/16 , H04L29/12047 , H04L61/15 , H04L65/1059 , H04L65/4084
摘要： A system and method of communicating audio through a network. The method includes detecting audio content from an audio source by a first network terminal, sending a directory packet including a network address of the detected audio content to a second network terminal, and requesting the audio content through the network by the second audio terminal. The further step of storing the detected audio content in a buffer for audio packets identified by packet identities may be added. The sending a directory packet step may include sending a packet identity, and the requesting step may include specifying an audio packet according to the packet identity. A further step of sending a source packet including the network address of the detected audio content to a network directory server by the first network terminal may be added. The network directory server may execute the sending a directory packet step.
摘要翻译： 一种通过网络传送音频的系统和方法。 该方法包括：通过第一网络终端从音频源检测音频内容，向第二网络终端发送包括检测到的音频内容的网络地址的目录分组，以及通过第二音频终端通过网络请求音频内容。 可以添加将检测到的音频内容存储在由分组标识识别的音频分组的缓冲器中的进一步步骤。 发送目录分组步骤可以包括发送分组标识，并且请求步骤可以包括根据分组标识指定音频分组。 可以添加由第一网络终端向网络目录服务器发送包括检测到的音频内容的网络地址的源分组的另一步骤。 网络目录服务器可以执行发送目录包步骤。
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公开(公告)号：US20080117899A1
公开(公告)日：2008-05-22
申请号：US11600476
申请日：2006-11-16
IPC分类号： H04L12/56
CPC分类号： H04L67/16 , H04L29/12047 , H04L61/15 , H04L65/1059 , H04L65/4084
摘要： A system and method of communicating audio through a network. The method includes detecting audio content from an audio source by a first network terminal, sending a directory packet including a network address of the detected audio content to a second network terminal, and requesting the audio content through the network by the second audio terminal. The further step of storing the detected audio content in a buffer for audio packets identified by packet identities may be added. The sending a directory packet step may include sending a packet identity, and the requesting step may include specifying an audio packet according to the packet identity. A further step of sending a source packet including the network address of the detected audio content to a network. directory server by the first network terminal may be added. The network directory server may execute the sending a directory packet step.
摘要翻译： 一种通过网络传送音频的系统和方法。 该方法包括：通过第一网络终端从音频源检测音频内容，向第二网络终端发送包括检测到的音频内容的网络地址的目录分组，以及通过第二音频终端通过网络请求音频内容。 可以添加将检测到的音频内容存储在由分组标识识别的音频分组的缓冲器中的进一步步骤。 发送目录分组步骤可以包括发送分组标识，并且请求步骤可以包括根据分组标识指定音频分组。 将包括检测到的音频内容的网络地址的源分组发送到网络的另一步骤。 可以添加第一网络终端的目录服务器。 网络目录服务器可以执行发送目录包步骤。
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7.发明授权Method for determining the frequency of a radio signal and monitoring communications with a radio receiver 有权用于确定无线电信号的频率并监视与无线电接收机的通信的方法公开(公告)号：US07190937B1
公开(公告)日：2007-03-13
申请号：US11386718
申请日：2006-03-23
CPC分类号： H04B17/382
摘要： A method and apparatus provide for monitoring radio frequency signals and, in conjunction with the monitoring, determining frequency of a received dominant radio frequency signal. Zero amplitude transitions of the signal are counted in primary and secondary sampling periods to determine frequency and frequency stability. The method and apparatus can be used to tune to radio frequency signals having frequencies in a list of frequencies to be monitored and detecting signals in the radio frequency spectrum on other frequencies. The monitoring and scanning may occur simultaneously, sequentially, or in any order or sequence. The frequencies of dominant signals received are determined and added to the list for monitoring. The receiver may be tuned to a frequency determined immediately upon determination of the frequency determined, after storage of the frequency determined, only after a signal on the currently monitored frequency terminates, or upon other conditions. A user of the apparatus can build a list of frequencies to be monitored automatically without sophisticated knowledge or equipment.
摘要翻译： 一种方法和装置，用于监测射频信号，并结合监测确定接收到的主要射频信号的频率。 在一次和二次采样周期中对信号的零幅度转变进行计数，以确定频率和频率稳定性。 该方法和装置可用于调谐具有要监视的频率列表中的频率的射频信号，并且在其它频率上的无线电频谱中检测信号。 监视和扫描可以同时，顺序或以任何顺序或顺序发生。 确定接收到的主要信号的频率并将其添加到列表中进行监视。 只有在当前监视频率的信号终止之后，或者在其他条件下，接收机可以被调谐到在确定所确定的频率之后立即确定的频率。 该设备的用户可以在没有复杂知识或设备的情况下自动建立待监控的频率列表。
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公开(公告)号：US5956648A
公开(公告)日：1999-09-21
申请号：US820338
申请日：1997-03-12
CPC分类号： H04W24/00
摘要： A method and apparatus for passively monitoring communications in a trunked communication system. Digital messages transmitted over a control channel at a particular frequency are monitored with a receiver. When a first bit pattern is detected in a digital message, subsequently transmitted data is stored. Information is extracted from the stored data to obtain a channel assignment code indicating a frequency over which communications take place and a talk group identification code identifying a talk group in the trunked communication system participating in a communication. If the talk group is a talk group of interest, the receiver is tuned to the frequency corresponding to the channel assignment code so that voice communications are successfully monitored. The receiver is tuned to the control channel after each voice communication so that a communication including multiple transmissions on different frequencies is coherently monitored by retuning the receiver in accordance with the received channel assignment codes. In an alternative embodiment, separate receivers are provided for the control channel and for voice communications. The voice receiver is continually tuned to different working channels in response to talk group and channel assignment codes received by the control channel receiver.
摘要翻译： 一种用于被动监测集群通信系统中的通信的方法和装置。 以特定频率通过控制信道发送的数字消息由接收机监视。 当在数字消息中检测到第一位模式时，随后发送的数据被存储。 从所存储的数据中提取信息，以获得指示进行通信的频率的信道分配码和识别参与通信的集群通信系统中的通话组的通话组识别码。 如果通话组是感兴趣的通话组，则将接收机调谐到对应于频道分配码的频率，以便成功地监视语音通信。 在每个语音通信之后，接收机被调谐到控制信道，使得通过根据所接收的信道分配码重新接收接收机来相干地监视包括不同频率上的多个传输的通信。 在替代实施例中，为控制信道和语音通信提供单独的接收机。 响应于由控制信道接收机接收的通话组和信道分配码，语音接收机被不断地调到不同的工作信道。
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公开(公告)号：US09100272B1
公开(公告)日：2015-08-04
申请号：US13354009
申请日：2012-01-19
IPC分类号： H04L12/28 , H04L12/701 , H04L12/931 , H04J1/16
CPC分类号： H04L45/00 , H04L29/0653 , H04L49/351 , H04L65/604 , H04L69/22
摘要： A network audio feed source terminal, for coupling units of audio content from an audio source to a network. The feed terminal includes a source interface that receives audio content from the audio source and a content monitor that identifies audio content in accordance with monitoring criteria. The feed terminal also includes a means for capturing a selected portion of the identified audio content as units of audio content in accordance with capture criteria, and, a network interface that couples the units of audio content into the network.
摘要翻译： 网络音频馈送源终端，用于将来自音频源的音频内容的单元耦合到网络。 馈送终端包括从音频源接收音频内容的源接口和根据监视标准识别音频内容的内容监视器。 馈送终端还包括用于根据捕获准则捕获所识别的音频内容的所选部分作为音频内容的单位的装置，以及将音频内容的单元耦合到网络中的网络接口。
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10.发明授权Method and apparatus for determining the frequency of a radio signal during periods of stability and monitoring communications with a radio receiver 有权用于在稳定和监视与无线电接收机的通信期间确定无线电信号的频率的方法和装置公开(公告)号：US07046964B1
公开(公告)日：2006-05-16
申请号：US11003460
申请日：2004-12-06
CPC分类号： H04B17/318
摘要： A method and apparatus provide for monitoring radio frequency signals and, in conjunction with the monitoring, determining frequency of a received dominant radio frequency signal. Zero amplitude transitions of the signal are counted in primary and secondary sampling periods to determine frequency and frequency stability. The method and apparatus can be used to tune to radio frequency signals having frequencies in a list of frequencies to be monitored and detecting signals in the radio frequency spectrum on other frequencies. The monitoring and scanning may occur simultaneously, sequentially, or in any order or sequence. The frequencies of dominant signals received are determined and added to the list for monitoring. The receiver may be tuned to a frequency determined immediately upon determination of the frequency determined, after storage of the frequency determined, only after a signal on the currently monitored frequency terminates, or upon other conditions. A user of the apparatus can build a list of frequencies to be monitored automatically without sophisticated knowledge or equipment.
摘要翻译： 一种方法和装置，用于监测射频信号，并结合监测确定接收到的主要射频信号的频率。 在一次和二次采样周期中对信号的零幅度转变进行计数，以确定频率和频率稳定性。 该方法和装置可用于调谐具有要监视的频率列表中的频率的射频信号，并且在其它频率上的无线电频谱中检测信号。 监视和扫描可以同时，顺序或以任何顺序或顺序发生。 确定接收到的主要信号的频率并将其添加到列表中进行监视。 只有在当前监视频率的信号终止之后，或者在其他条件下，接收机可以被调谐到在确定所确定的频率之后立即确定的频率。 该设备的用户可以在没有复杂知识或设备的情况下自动建立待监控的频率列表。
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