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公开(公告)号：US5473367A
公开(公告)日：1995-12-05
申请号：US85997
申请日：1993-06-30
申请人： Bruce M. Bales , Ted M. Fidder , John G. Fijolek , Donald D. Gallagher , Robert L. Lien , Stephen M. Thieler , Vojislav V. Vucetic
发明人： Bruce M. Bales , Ted M. Fidder , John G. Fijolek , Donald D. Gallagher , Robert L. Lien , Stephen M. Thieler , Vojislav V. Vucetic
摘要： A switching system for allowing any one conferee on a video conference to assume the role of manually manipulating the video picture that will be seen by all conferees (chair view). In addition, each individual conferee is allowed to determine their own video picture content or to select the chair view. Further, anyone of conferees can assume the role of determining the chair view. In addition, for the video classroom, a chair view video picture is composed such that the picture displays the visual aid with an insert for an instructor and an insert for a student asking a question. Further, the instructor selects by using a button or mouse which student is to be displayed in the student insert, and the video picture automatically displays that student. In another embodiment of the system, the students request permission to ask a question by actuation of a switch on their telephone set, and the names of students asking questions are displayed on a computer display screen. The instructor then can select the student by manipulating the cursor on the computer display to select the desired student.
摘要翻译： 用于允许视频会议上的任何一个与会者承担手动操纵所有与会者将看到的视频图片的角色的切换系统（椅子视图）。 此外，每位个人的同伴都可以自行决定自己的视频图片内容或选择椅子视图。 此外，任何与会者都可以承担确定椅子视图的角色。 另外，对于视频教室，组成椅子视图视频图片，使得图片显示视觉辅助，插入教师和插入学生提问。 此外，教师通过使用学生在学生插入中显示学生的按钮或鼠标进行选择，并且视频画面自动显示该学生。 在系统的另一个实施例中，学生通过致动其电话机上的开关请求问题的许可，并且在计算机显示屏幕上显示询问问题的学生姓名。 然后，教师可以通过操纵计算机显示屏上的光标来选择学生，以选择所需的学生。
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公开(公告)号：US4475010A
公开(公告)日：1984-10-02
申请号：US491905
申请日：1983-05-05
CPC分类号： H04W36/0083 , H04B7/2621
摘要： In a cellular mobile telecommunication system, a method and apparatus for controlling the process of locating a mobile unit from the cell sites. When a mobile unit goes beyond the radio range of its associated controlling cell site, that cell site sends a message to nearby cell sites to measure and report the strength of the received signal from that mobile on each of their directional antennas and to report radio channel availability. These reports are returned to the controlling cell site which compares the received signal strength mesurements against stored thresholds. The controlling cell site generates and transmits to the mobile telecommunications switching office (MTSO) a hand-off request message including a list of candidate hand-off cell sites and directional antennas. The MTSO then selects an available channel associated with one of the candidate cell sites and antennas and generates a sequence of messages to hand-off communications control from the controlling cell site to a candidate cell site.
摘要翻译： 在蜂窝移动电信系统中，一种用于控制从小区站点定位移动单元的过程的方法和装置。 当移动单元超出其相关联的控制小区站点的无线电范围时，该小区站点向附近的小区站点发送消息，以测量并报告来自该移动站的每个定向天线的接收信号的强度并报告无线电信道 可用性。 这些报告被返回到控制小区站点，该站点将接收到的信号强度测量值与存储的阈值进行比较。 控制小区站点生成并向移动电信交换局（MTSO）发送包括候选切换小区站点和定向天线的列表的切换请求消息。 然后，MTSO选择与候选小区站点和天线之一相关联的可用信道，并产生一个消息序列，以将通信控制从控制小区站点切换到候选小区站点。
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公开(公告)号：US5396492A
公开(公告)日：1995-03-07
申请号：US54332
申请日：1993-04-28
申请人： Robert L. Lien
发明人： Robert L. Lien
CPC分类号： H04N21/4305 , H04J3/0632 , H04N21/64307 , H04Q11/0478 , H04L2012/5674
摘要： An adaptive clock recovery arrangement for deriving a synchronous clock from an asynchronous, packet stream such as an asynchronous transfer mode (ATM) cell stream. The deviation in the magnitude of information stored in a first-in-first-out memory is continually monitored, and the synchronous clock frequency, referred to as the adaptive line clock frequency, is adjusted in a plurality of modes, under the control of a processor. The adjustment is made in response to a detected increasing condition of the monitored deviation. The adjustments are open-loop adjustments made without continually adjusting the adaptive line clock frequency based on the monitored deviation. Damping is substantially reduced compared with "conventional" PLL arrangements because the open-loop adjustments result in a rapid frequency correction with perfect or nearly perfect deadbeat damping, i.e. without the frequency oscillations that continue after the correct frequency is reached in closed-loop arrangements.
摘要翻译： 一种用于从诸如异步传输模式（ATM）信元流之类的异步分组流导出同步时钟的自适应时钟恢复装置。 连续地监视存储在先进先出存储器中的信息的大小的偏差，并且在多个模式中调整被称为自适应线路时钟频率的同步时钟频率，在一个 处理器。 响应于检测到的监视偏差的增加状况进行调整。 调整是进行开环调整，而不是根据监测的偏差不断调整自适应线路时钟频率。 与“常规”PLL装置相比，阻尼显着降低，因为开环调节导致快速频率校正，具有完美或接近完美的无节拍阻尼，即没有在闭环装置中达到正确频率之后继续的频率振荡。
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公开(公告)号：US5261090A
公开(公告)日：1993-11-09
申请号：US536819
申请日：1990-06-12
申请人： Robert L. Lien
发明人： Robert L. Lien
IPC分类号： G06F7/02 , G06F17/30 , G06F7/22 , G06F15/417
CPC分类号： G06F17/30988 , G06F7/026 , Y10S707/99933
摘要： A range of data that is included in a data file is represented among the records of the file by a record of a lower limit of the range and a separate, sequential, record of an upper limit of the range. Each searchable representation of a record, such as a table entry, has a pair of flags to identify the record as a range low limit or a range high limit, or neither. When a conventional binary search of the ordered file records is performed and completed and the sought-for datum is not found, the record last examined during the search is checked. If that last record is lower in the order than the sought-for datum and its low range limit flag is set, or if the record is higher in the order than the sought-for datum and its high range limit flag is set, then the sought-for datum is in the file and is a member of the included range.
摘要翻译： 包含在数据文件中的数据范围通过范围的下限和范围的上限的单独的，顺序的记录的记录在文件的记录之间表示。 记录的每个可搜索的表示（例如表条目）具有一对标记，以将该记录识别为范围下限或范围上限，或者两者都不是。 当执行并完成订购的文件记录的常规二进制搜索并且找不到寻找的数据时，检查在搜索期间检查的记录。 如果该最后一条记录的顺序低于所寻求的数据，并且其低范围限制标志被设置，或者如果记录的顺序比所寻求的数据高，并且其高范围限制标志被设置，则 寻找的基准在文件中，并且是包含范围的成员。
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