公开(公告)号：US4763207A

公开(公告)日：1988-08-09

申请号：US941205

申请日：1986-12-12

申请人： J. B. Podolak ,  Douglas R. Adler ,  Ronald B. Saluski

发明人： J. B. Podolak ,  Douglas R. Adler ,  Ronald B. Saluski

IPC分类号： G11B20/10 ,  H03M1/12 ,  G11B5/09 ,  H03M1/00

CPC分类号： G11B20/10527 ,  H03M1/127

摘要： There is disclosed herein a method of and system for reproducing an analog signal using digital techniques. The system includes means for encoding the analog signal in digital form and means for decoding the encoded analog signal. The encoding means includes means for detecting the upper bandwidth limit of the input analog signal during each of a plurality of successive sample intervals. Means coupled to the detecting means are included for sampling the input analog signal at a sampling rate determined in accordance with the detected upper bandwidth limits to derive a series of voltage levels which together define a sampled approximation of the input analog signal. Means are coupled to the sampling means for converting each voltage level and the sampling rate at which such voltage level was derived into digital signals. Also included are means for detecting when the input analog signal is at substantially a zero level, means for developing a digital indication of the length of time the signal is at such level and means for combining the digital indication with the digital signals to develop a digital representation of the input analog signal. The decoding means includes means for sequentially retrieving the digital signals, means coupled to the retrieving means for converting the digital signals into the sampled approximation of the input analog signal and a low-pass filter coupled to the converting means having a cut-off frequency determined in accordance with the encoded sampling rate for filtering the sampled approximation to reproduce the input analog signal.

摘要翻译： 这里公开了使用数字技术再现模拟信号的方法和系统。 该系统包括用于对数字形式的模拟信号进行编码的装置和用于对编码的模拟信号进行解码的装置。 编码装置包括用于在多个连续采样间隔的每一个期间检测输入模拟信号的上限带宽的装置。 包括耦合到检测装置的装置用于以根据检测到的上限带宽确定的采样速率对输入的模拟信号进行采样，以导出一系列电压电平，这些电压电平共同限定了输入模拟信号的采样近似。 装置耦合到采样装置，用于将每个电压电平和将该电压电平导出的采样率转换成数字信号。 还包括用于检测输入模拟信号何时基本上为零电平的装置，用于开发信号处于这种电平的时间长度的数字指示的装置，以及用于将数字指示与数字信号组合以形成数字信号的装置 表示输入模拟信号。 解码装置包括用于顺序检索数字信号的装置，耦合到检索装置的装置，用于将数字信号转换为输入模拟信号的采样近似值;以及耦合到转换装置的低通滤波器，其具有确定的截止频率 根据用于滤波采样近似的编码采样率来再现输入的模拟信号。

公开(公告)号：US07155672B1

公开(公告)日：2006-12-26

申请号：US09576754

申请日：2000-05-23

申请人： Douglas R. Adler ,  Gregory J. Nawrocki ,  Peter A. Korp ,  Masakatsu Yoneda

发明人： Douglas R. Adler ,  Gregory J. Nawrocki ,  Peter A. Korp ,  Masakatsu Yoneda

IPC分类号： G06F17/21 ,  G06F17/28 ,  G06F17/24

CPC分类号： G06F17/214

摘要： Methods and system for dynamic font subsetting. One or more directives are inserted into electronic content to identify one or more glyph sub-sets needed to display the multiple characters in one or more desired languages for electronic content. A directive identifies a glyph sub-set including set of glyphs identified in the electronic content and an encoding scheme used to encode the set of glyphs. The glyph sub-set identifies only those glyphs needed to display the electronic content. When electronic content with the one or more directives is processed the one or more directives are identified. If the electronic device does not have the glyph sub-sets needed to display the electronic content, requests are sent to an intermediate network device to obtain glyph sub-sets. These method and system may allow an electronic device with limited resources, such as a wireless telephone, personal digital assistant, network appliance, set-top box, etc., to display electronic content from a computer network such as the Internet or an intranet, with virtually any font, even if the fonts from the electronic content do not exist on the electronic device. Electronic content written in languages such as Chinese, Japanese, Korean, Vietnamese, etc. can be displayed on an electronic device with limited resources using a small number of glyphs from the multiple thousands of possible glyphs that represent characters in such languages.

摘要翻译： 动态字体子集的方法和系统。 将一个或多个指令插入到电子内容中以识别用于以电子内容的一种或多种所需语言显示多个字符所需的一个或多个字形子集。 指令识别包括在电子内容中识别的字形集合的字形子集和用于对字形集合进行编码的编码方案。 字形子集仅识别显示电子内容所需的字形。 当处理具有一个或多个指令的电子内容时，识别一个或多个指令。 如果电子设备没有显示电子内容所需的字形子集，则将请求发送到中间网络设备以获得字形子集。 这些方法和系统可以允许诸如无线电话，个人数字助理，网络设备，机顶盒等的有限资源的电子设备从诸如因特网或内部网的计算机网络显示电子内容， 即使来自电子内容的字体不存在于电子设备上，几乎具有任何字体。 使用中文，日语，韩语，越南语等语言的电子内容可以使用有限的资源使用来自代表这些语言的字符的数千个可能字形中的少量字形来显示。

公开(公告)号：US5818605A

公开(公告)日：1998-10-06

申请号：US699528

申请日：1996-08-19

申请人： Albert Crewe ,  George B. Thiel ,  Douglas R. Adler ,  Riyazhassan M. Asaria

发明人： Albert Crewe ,  George B. Thiel ,  Douglas R. Adler ,  Riyazhassan M. Asaria

IPC分类号： B41C1/045 ,  G01B7/34 ,  H04N1/00 ,  B41C1/04

CPC分类号： H04N1/00015 ,  B41C1/045 ,  G01B7/34 ,  H04N1/00002 ,  H04N1/00034 ,  H04N1/0005 ,  H04N1/00063 ,  H04N1/00082 ,  Y10T409/30784 ,  Y10T409/308064

摘要： Method and apparatus for high resolution sensing of engraving stylus movement for dynamic control of an engraving machine while engraving, improved calibration and as a tool used to assist in selecting acceptable gravure cylinders and improving the manufacturing process of making gravure cylinders is described. A variety of sensors are described in conjunction with measuring engraving stylus movement, specifically, sensors that measure small changes in capacitance, resistance, impedance, optical reflections, optical interference patterns, induced eddy currents and voltages induced in a two-material piezoelectric rod which corresponding to positional changes of the engraving stylus.

摘要翻译： 描述了用于雕刻触针运动的高分辨率感测的方法和装置，用于雕刻机的动态控制，改进的校准以及用作辅助选择可接受的凹版滚筒并改进制造凹版滚筒的制造工艺的工具。 多种传感器结合测量雕刻触针的运动进行描述，具体来说，可测量电容，电阻，阻抗，光学反射，光学干涉图案，感应涡流以及在双材料压电棒中产生的电压的微小变化的传感器 到刻印笔的位置变化。