专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5576844A Computer controlled video interactive learning system 失效
标题翻译：计算机控制视频交互式学习系统
公开(公告)号：US5576844A
公开(公告)日：1996-11-19
申请号：US300990
申请日：1994-09-06
申请人： Ronald K. Anderson , Duane F. Benson , Michael K. Crock , Bruine R. Hack , James E. Howard , Ray S. McKaig , John Peers
发明人： Ronald K. Anderson , Duane F. Benson , Michael K. Crock , Bruine R. Hack , James E. Howard , Ray S. McKaig , John Peers
IPC分类号： G09B5/06 , G09B7/04 , G11B27/028 , G11B27/031 , H04N5/91 , G11B27/02 , H04N5/76 , H04N9/79
CPC分类号： G11B27/031 , G09B5/065 , G09B7/04 , G11B27/028
摘要： A computer controlled video interactive courseware system is designed for the generation, viewing, and duplication of interactive instructional video tapes. An interactive instructional videotape contains video segments located on the stereo-video portion of a tape containing live-motion video images for the presentation of a lesson. Portions of the stereo-video portion of the tape contains video signals that contain digitally encoded information which is retrieved by the computer during playback of the tape. The digital information extracted from the videotape contains computer instructions to provide interactivity with students. Interactivity could include a presentation of questions to the student and based on the student's response to the question presenting selected video segments from the video tape. Preferably, the video cassette recorder is S-VHS which provides for increased bandwidth and uses a higher quality tape medium than standard VHS tape medium.
摘要翻译：计算机控制的视频交互课件系统被设计用于生成，观看和复制交互式教学录象带。交互式教学录像带包含位于录像带的实时动态视频图像的磁带的立体声视频部分上的视频段，用于呈现课程。磁带的立体视频部分的部分包含包含数字编码信息的视频信号，该数字编码信息在磁带重放期间由计算机检索。从录像带提取的数字信息包含计算机指令，以提供与学生的互动。交互性可以包括向学生介绍问题，并根据学生对从视频磁带中呈现所选视频片段的问题的回答。优选地，录像机是S-VHS，其提供增加的带宽并且使用比标准VHS磁带介质更高质量的磁带介质。

2. 发明授权

US06920632B2 Dynamic multilevel task management method and apparatus 失效
标题翻译：动态多层次任务管理方法和装置
公开(公告)号：US06920632B2
公开(公告)日：2005-07-19
申请号：US10227050
申请日：2002-08-23
申请人： Brian Donovan , Ray S. McKaig , William B. Dress
发明人： Brian Donovan , Ray S. McKaig , William B. Dress
IPC分类号： G06F9/48 , G05B13/02 , G05B19/18 , G06F9/00 , G06F9/38 , G06F9/46 , G06F15/16
CPC分类号： G06F9/4881 , G06F9/3851
摘要： A method for the orderly execution of multiple tasks in a data processing system and a circuit for implementing that method include a plurality of task modules which construct bids based upon the order of the task and its priority. The highest priority highest order number tasks are switched to available system execution resources. The system permits the orderly execution of round-robin task sets in an environment of dynamically changing priorities. When a round-robin task set is interrupted, the system is able to return to the round-robin task set after execution of the higher priority task at the exact point the interruption occurred.
摘要翻译：用于在数据处理系统中有序执行多个任务的方法和用于实现该方法的电路的方法包括：多个任务模块，其基于任务的顺序及其优先级构建投标。最高优先级的最高订单号任务切换到可用的系统执行资源。该系统允许在动态改变优先级的环境中有序地执行循环任务集。当循环任务集中断时，系统能够在发生中断的确切点执行较高优先级任务后返回循环任务集。

3. 发明授权

US06850177B2 Digital to analog convertor 有权
标题翻译：数模转换器
公开(公告)号：US06850177B2
公开(公告)日：2005-02-01
申请号：US10477684
申请日：2002-05-13
申请人： Brian Donovan , Ray S. McKaig
发明人： Brian Donovan , Ray S. McKaig
IPC分类号： H03M1/82 , H03M1/68
CPC分类号： H03M1/68 , H03M1/822
摘要： A method and circuit are provided for converting a digital signal to an analog signal in the form of a pulse width modulated (PWM) pulse (20). The PWM pulse is generated during an output cycle of a pulse generator to form a pulsetrain output of pulses at a fixed frequency whose widths are determined by dynamically changing digital input data. The method includes the steps of dividing the digital data signal into most significant bit (MSB) and least significant bit (LSB) portions. A PWM pulse is initiated at the beginning of an output cycle and continues while the MSB portion counts down in a counter (24). At the same time, the LSB portion of the digital data signal is converted to a precise phase delay signal which is a subcycle of an oscillator controlling the counter. This phase delay signal is generated after the termination of the MSB count, and halts the high period of the PWM pulse during the output cycle. When the output cycle ends, the process is repeated with the next digital signal.
摘要翻译：提供一种方法和电路，用于将数字信号转换成脉冲宽度调制（PWM）脉冲（20）形式的模拟信号。在脉冲发生器的输出周期期间产生PWM脉冲以形成固定频率的脉冲的脉冲串输出，其宽度通过动态地改变数字输入数据来确定。该方法包括将数字数据信号分成最高有效位（MSB）和最低有效位（LSB）部分的步骤。 PWM脉冲在输出周期开始时启动，并在MSB部分在计数器（24）中向下计数时继续。同时，数字数据信号的LSB部分被转换为精确的相位延迟信号，该相位延迟信号是控制计数器的振荡器的子周期。该相位延迟信号在MSB计数结束后产生，并在输出周期中停止PWM脉冲的高电平周期。当输出周期结束时，使用下一个数字信号重复该过程。

4. 发明授权

US06445326B1 High speed precision analog to digital convertor 失效
标题翻译：高速精密模数转换器
公开(公告)号：US06445326B1
公开(公告)日：2002-09-03
申请号：US09602596
申请日：2000-06-22
申请人： Brian T. Donovan , Ray S. McKaig , William B. Dress
发明人： Brian T. Donovan , Ray S. McKaig , William B. Dress
IPC分类号： H03M112
CPC分类号： H03M1/14 , H03M1/502 , H03M1/504
摘要： An analog to digital convertor includes a pulse width modulated circuit (PWM) responsive to an analog parameter of an analog signal. The PWM circuit generates a pulse having a duty cycle proportional to the analog parameter. A counter generates a plurality of counterpulses during the pulse duty cycle and a sub-cycle pulse generator generates a series of subcycle pulses during each of the counterpulses. A latch circuit latches the state of the subcycle pulse generator at a predetermined time relative to the termination of the PWM pulse and a logic circuit counts the number of counterpulses which are generated during the PWM pulse. A most significant bit number is represented by the number of counter-pulses and a least significant bit number is determined by the state of the subcycle pulses in the latch. These two numbers added together provide a digital number representative of the analog parameter.
摘要翻译：模数转换器包括响应于模拟信号的模拟参数的脉宽调制电路（PWM）。 PWM电路产生具有与模拟参数成比例的占空比的脉冲。计数器在脉冲占空比期间产生多个反向脉冲，并且子周期脉冲发生器在每个对称脉冲期间产生一系列子周期脉冲。锁存电路相对于PWM脉冲的终止在预定时间锁存子周期脉冲发生器的状态，并且逻辑电路对在PWM脉冲期间产生的反向脉冲数进行计数。最高有效位数由反脉冲数表示，最低有效位数由锁存器中的子循环脉冲的状态决定。这两个数字相加在一起提供了代表模拟参数的数字数字。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式