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    • 4. 发明授权
    • Data transmission method and apparatus by period shift keying (TSK)
    • 数据传输方法和装置通过周期移位键控(TSK)
    • US4926444A
    • 1990-05-15
    • US187978
    • 1988-04-29
    • Scott L. HamiltonMichael P. HarneyDavid J. NaddorJames O. FarmerRichard B. FrederickRandolph J. Schaubs
    • Scott L. HamiltonMichael P. HarneyDavid J. NaddorJames O. FarmerRichard B. FrederickRandolph J. Schaubs
    • H04L27/10
    • H04L27/10
    • Apparatus for transmitting and receiving a period shift keyed data stream comprises a data processor such as a microprocessor which may control the generation of the waveform as well as the determination of the bit values of an incoming signal. When the data to be transmitted comprises a plurality of data values, each data value is represented by a different predetermined frequency. Further, each data value is represented by the transmission of the predetermined frequency for a predetermined transitionary interval plus one cycle or period. One portion of the transitionary interval precedes and the remaining portion follows the one cycle. For example, the data value may be represented by a three cycle burst of frequency such that, in determining the represented data value, two cycles of transitionary interval are detected but ignored and the central cycle of the three cycle burst is timed for determining the data value by edge detection techniques. Consequently, transitionary influences caused by changes in frequency do not adversely affect data value determination.
    • 用于发送和接收周期移位键控数据流的装置包括诸如微处理器的数据处理器,其可以控制波形的产生以及确定输入信号的比特值。 当要发送的数据包括多个数据值时,每个数据值由不同的预定频率表示。 此外,每个数据值由预定转换间隔加上一个周期或周期的预定频率的传输来表示。 转换间隔的一部分先于其余部分跟随一个周期。 例如,数据值可以由三个周期的频率突发来表示,使得在确定所表示的数据值时,检测到两个周期的转换间隔但被忽略,并且三个周期脉冲串的中心周期被定时以用于确定数据 边缘检测技术的价值。 因此,由频率变化引起的过渡影响不会对数据值确定产生不利影响。
    • 8. 发明授权
    • HD barcode
    • 高清条形码
    • US08360333B2
    • 2013-01-29
    • US13079661
    • 2011-04-04
    • David J. Naddor
    • David J. Naddor
    • G06K19/06
    • G06K19/06028G06K19/06075
    • A bi-directional two-dimensional (2D) matrix barcode symbology for use with bar code, cell phones and other optical readers. A finder structure includes indicia for locating data blocks containing bytes of information encoded through bi-directional and orthogonal lines containing individual bits of information. Individual blocks contain error correction information, and are formed into 2×2 superblocks used to build larger codes. Intrinsic prefix information provides a redundant geometric identification for individual blocks within the overall structure, providing a built-in mapping of the overall structure, even when portions are missing or undecodable. The overall symbol has a second set of error correction parameters for further redundancy. The symbology is a versatile symbology in that the number of check data blocks is user selectable to provide the desired level of error correction.
    • 一种用于条码,手机和其他光学读取器的双向二维(2D)矩阵条形码符号。 取景器结构包括用于定位包含通过包含各个信息位的双向和正交线编码的信息字节的数据块的标记。 单个块包含纠错信息,形成2×2个超级块,用于构建较大的代码。 内部前缀信息为整个结构中的各个块提供冗余的几何标识,即使当部分丢失或不可解码时,也提供了整体结构的内置映射。 整体符号具有第二组纠错参数,用于进一步的冗余。 符号系统是一种通用符号系统,其中检查数据块的数量是用户可选择的,以提供期望的纠错水平。
    • 9. 发明申请
    • HD Barcode
    • 高清条形码
    • US20110240749A1
    • 2011-10-06
    • US13079661
    • 2011-04-04
    • David J. Naddor
    • David J. Naddor
    • G06K19/06
    • G06K19/06028G06K19/06075
    • A bi-directional two-dimensional (2D) matrix barcode symbology for use with bar code, cell phones and other optical readers. A finder structure includes indicia for locating data blocks containing bytes of information encoded through bi-directional and orthogonal lines containing individual bits of information. Individual blocks contain error correction information, and are formed into 2×2 superblocks used to build larger codes. Intrinsic prefix information provides a redundant geometric identification for individual blocks within the overall structure, providing a built-in mapping of the overall structure, even when portions are missing or undecodable. The overall symbol has a second set of error correction parameters for further redundancy. The symbology is a versatile symbology in that the number of check data blocks is user selectable to provide the desired level of error correction.
    • 一种用于条码,手机和其他光学读取器的双向二维(2D)矩阵条形码符号。 取景器结构包括用于定位包含通过包含各个信息位的双向和正交线编码的信息字节的数据块的标记。 单个块包含纠错信息,形成2×2个超级块,用于构建较大的代码。 内部前缀信息为整个结构中的各个块提供冗余的几何标识,即使当部分丢失或不可解码时,也提供了整体结构的内置映射。 整体符号具有第二组纠错参数,用于进一步的冗余。 符号系统是一种通用符号系统,其中检查数据块的数量是用户可选择的,以提供期望的纠错水平。
    • 10. 发明授权
    • Ultrasonic control disk drive system
    • 超声波控制磁盘驱动系统
    • US5412585A
    • 1995-05-02
    • US140836
    • 1993-10-25
    • Scott L. HamiltonDavid J. Naddor
    • Scott L. HamiltonDavid J. Naddor
    • G06F1/32G04F1/00G04F3/00
    • G06F1/3215G06F1/3268Y02B60/1246
    • The invention also known as "Disk-saver" employs a novel method of controlling the power to the hard disk drive of an electronic digital computer. A "Terminate and Stay Resident" (TSR) program is executed in the electronic digital computer which provides the timing function to determine when the hard disk drive should be turned off. When the decision is reached to turn the power on or off, the TSR program generates an ultrasonic coded signal which is sent to a loudspeaker to which the disk-saver module of this invention is connected to monitor the ultrasonic coded signal. When the signal is generated the Disk-saver module of this invention turns the power to the disk drive on or off as directed by the coded ultrasonic signal.
    • 本发明也称为“磁盘保护器”采用控制电子数字计算机的硬盘驱动器的电源的新颖方法。 在电子数字计算机中执行“终止和驻留”(TSR)程序,其提供定时功能以确定何时应该关闭硬盘驱动器。 当达到打开或关闭电源的决定时,TSR程序产生一个超声波编码信号,该信号被发送到与本发明的磁盘保护模块连接的扬声器,以监视超声编码信号。 当产生信号时,本发明的磁盘保护模块根据编码的超声波信号的指示将磁盘驱动器的电源打开或关闭。