公开(公告)号：US09506882B2

公开(公告)日：2016-11-29

申请号：US13352865

申请日：2012-01-18

Applicant: Udayan Dasgupta ,  Murtaza Ali

Inventor： Udayan Dasgupta ,  Murtaza Ali

IPC: G06K9/00 ,  G01N23/223 ,  G06T1/20 ,  G06T5/00

CPC classification number: G01N23/223 ,  G01N2223/076 ,  G06T1/20 ,  G06T5/004 ,  G06T2207/10121 ,  G06T2207/20012 ,  G06T2207/20182 ,  G06T2207/30021 ,  G06T2207/30101

Abstract: A system for processing real-time fluoroscopy image sequences. A first image frame is loaded into an upper level memory of a hierarchical memory system that is coupled to at least one processing core. The first image frame is processed with an object detection filter to form a likelihood image frame. The first image frame and the likelihood image frame is spatially filtered using a spatial filter look up table (LUT) stored in an L1 level memory of the processing core. The likelihood image frame is temporally filtering using a temporal filter LUT stored in the L1 level memory.

Abstract translation: 一种用于处理实时荧光透视图像序列的系统。 第一图像帧被加载到耦合到至少一个处理核的分层存储器系统的上层存储器中。 用对象检测滤波器处理第一图像帧以形成似然图像帧。 使用存储在处理核心的L1级存储器中的空间滤波器查找表（LUT）对第一图像帧和似然图像帧进行空间滤波。 使用存储在L1级存储器中的时间滤波器LUT对似然图像帧进行时间滤波。

公开(公告)号：US07352823B2

公开(公告)日：2008-04-01

申请号：US10748998

申请日：2003-12-30

Applicant: Udayan Dasgupta ,  Fernando A. Mujica ,  Murtaza Ali

Inventor： Udayan Dasgupta ,  Fernando A. Mujica ,  Murtaza Ali

IPC: H04L5/12 ,  H04L23/02

CPC classification number: H04L25/067 ,  H04L1/0054 ,  H04L1/0059 ,  H04L27/2649 ,  H04L27/3438

Abstract: Method for computing distances to received data points. A preferred embodiment comprises determining a first point on a grid nearest to the received point, computing a second point closest to the received point inside a specified area, wherein the second point is a point in a first coset, computing a third, fourth, and fifth point, wherein each point is a member of a different coset and each point is the closest point in its coset to the received point, and computing a distance from the received point to each of the second, third, fourth, and fifth points.

Abstract translation: 计算接收数据点距离的方法。 优选实施例包括确定最接近接收点的网格上的第一点，计算最接近指定区域内的接收点的第二点，其中第二点是第一陪集中的点，计算第三，第四和 第五点，其中每个点是不同陪集的成员，并且每个点是其对接收点的陪集中的最近点，并且计算从接收点到第二，第三，第四和第五点中的每一个的距离。

公开(公告)号：US20060095581A1

公开(公告)日：2006-05-04

申请号：US11220089

申请日：2005-09-06

Applicant: Murtaza Ali ,  Shahedolla Molla ,  Narasimhan Venkatraman ,  Channamallesh Hiremath ,  Umashankar Iyer ,  Udayan Dasgupta ,  Austin Hunt ,  Dennis Mannering

Inventor： Murtaza Ali ,  Shahedolla Molla ,  Narasimhan Venkatraman ,  Channamallesh Hiremath ,  Umashankar Iyer ,  Udayan Dasgupta ,  Austin Hunt ,  Dennis Mannering

IPC: G06F15/16

CPC classification number: H04M11/062

Abstract: A client premises digital subscriber line (DSL) modem having multi-mode capability is disclosed. In initialization, the modem estimates whether channel conditions are such that digital processing of the received data according to a lower data rate DSL standard, such as ADSL2, may result in a higher effective data rate than receipt and processing according to a higher data rate DSL standard, such as ADSL2+. If so, the DSL modem configures itself, such as by configuring its filter characteristics and sampling frequency, to receive and process data according to the lower data rate DSL standard; the transmitting modem, for example at a central office or service area interface, may continue to operate according to the higher data rate standard (with its bit loading corresponding to a subset of subchannels). The receiving DSL modem processes the payload data according to the lower standard, while processing control messages according to the higher standard.

公开(公告)号：US09015452B2

公开(公告)日：2015-04-21

申请号：US12708180

申请日：2010-02-18

Applicant: Udayan Dasgupta

Inventor： Udayan Dasgupta

IPC: G06F9/302 ,  G06F9/30 ,  G06F9/38 ,  G06F7/48 ,  G06F7/535 ,  G06F7/548 ,  G06F7/552

CPC classification number: G06F9/30014 ,  G06F7/4806 ,  G06F7/535 ,  G06F7/548 ,  G06F7/552 ,  G06F9/30036 ,  G06F9/30065 ,  G06F9/3887 ,  G06F9/3891 ,  G06F2207/3828 ,  G06F2207/5354 ,  G06F2207/5525

Abstract: A digital signal processor (DSP) includes an instruction fetch unit, an instruction decode unit, a register set and a plurality of work units in communication with the instruction decode unit. A first embodiment calculates two divisions on packed numerators and packed denominators. The DSP work units calculate indexes into a 1/d look-up table and make a final sign correction. A second embodiment calculates an approximation of a vector magnitude of a complex number x+jy. The approximation is based upon √(x2+y2)≈α*max(|x|, |y|)+β*min(|x|, |y|). The DSP work units calculate the absolute values, find the maxima and minima, and form the packed results of two vector magnitude calculations.

Abstract translation: 数字信号处理器（DSP）包括与指令解码单元通信的指令获取单元，指令解码单元，寄存器组和多个工作单元。 第一实施例计算包装分子和包装分母上的两个部分。 DSP工作单元将索引计算到1 / d查找表中，并进行最终符号校正。 第二实施例计算复数x + jy的矢量幅度的近似。 近似值基于√（x2 + y2）≈α* max（| x |，| y |）+＆bgr; * min（| x |，| y |）。 DSP工作单元计算绝对值，找到最大值和最小值，并形成两个矢量幅度计算的压缩结果。

公开(公告)号：US08830106B2

公开(公告)日：2014-09-09

申请号：US13599491

申请日：2012-08-30

Applicant: Udayan Dasgupta ,  Ganesan Thiagarajan ,  Venugopal Gopinathan

Inventor： Udayan Dasgupta ,  Ganesan Thiagarajan ,  Venugopal Gopinathan

IPC: H03M1/12 ,  H03M1/18

CPC classification number: H03M1/12 ,  H03M1/125 ,  H03M1/127 ,  H03M1/182

Abstract: A method is provided. An analog signal is received. The analog input signal is compared to first and second reference signals to generate a first comparison result, and the first comparison result and a first time stamp corresponding to the first comparison result are registered. A first portion of a digital signal is generated from the first comparison result. At least one of the first and second reference signals is adjusted. A second comparison result is generated if the analog signal reaches an adjusted one of the first and second reference signals within a predetermined interval, and a second portion of the digital signal is generated from the second comparison result.

Abstract translation: 提供了一种方法。 接收模拟信号。 将模拟输入信号与第一和第二参考信号进行比较以产生第一比较结果，并且登记与第一比较结果对应的第一比较结果和第一时间戳。 从第一比较结果生成数字信号的第一部分。 调整第一和第二参考信号中的至少一个。 如果模拟信号在预定间隔内达到第一和第二参考信号中调整的一个，并且从第二比较结果产生数字信号的第二部分，则产生第二比较结果。

公开(公告)号：US08754797B2

公开(公告)日：2014-06-17

申请号：US13599539

申请日：2012-08-30

Applicant: Venugopal Gopinathan ,  Udayan Dasgupta ,  Ganesan Thiagarajan

Inventor： Venugopal Gopinathan ,  Udayan Dasgupta ,  Ganesan Thiagarajan

IPC: H03M1/12 ,  H03M1/10

CPC classification number: H03M1/12 ,  H03M1/10 ,  H03M1/125 ,  H03M1/126 ,  H03M1/127 ,  H03M1/18 ,  H03M1/181

Abstract: An apparatus is provided. A comparison circuit is configured to receive an analog signal. A reference circuit is coupled to the comparison circuit and is configured to provide a plurality of reference signals to the comparison circuit. A conversion circuit is coupled to the comparison circuit and is configured to detect a change in the output of the comparison circuit. A time-to-digital converter (TDC) is coupled to the comparison circuit. A timer is coupled to the comparison circuit. A rate control circuit is coupled to the conversion circuit. An output circuit is coupled to the rate control circuit and the TDC, where the output circuit is configured to output at least one of a synchronous digital representation of the analog signal and an asynchronous digital representation of the analog signal.

Abstract translation: 提供了一种装置。 比较电路被配置为接收模拟信号。 参考电路耦合到比较电路，并被配置为向比较电路提供多个参考信号。 A转换电路耦合到比较电路，并被配置为检测比较电路的输出的变化。 时间数字转换器（TDC）耦合到比较电路。 定时器耦合到比较电路。 速率控制电路耦合到转换电路。 输出电路耦合到速率控制电路和TDC，其中输出电路被配置为输出模拟信号的同步数字表示和模拟信号的异步数字表示中的至少一个。

公开(公告)号：US20140062734A1

公开(公告)日：2014-03-06

申请号：US13599452

申请日：2012-08-30

Applicant: Ganesan Thiagarajan ,  Udayan Dasgupta ,  Venugopal Gopinathan

Inventor： Ganesan Thiagarajan ,  Udayan Dasgupta ,  Venugopal Gopinathan

IPC: H03M1/50

CPC classification number: H03M1/12 ,  H03M1/125 ,  H03M1/1255 ,  H03M1/127 ,  H03M3/458 ,  H03M3/498

Abstract: A method is provided. An analog signal is received. The analog input signal is compared to first and second reference signals to generate a first comparison result, and the first comparison result and a first time stamp corresponding to the first comparison result are registered. A first portion of a digital signal is generated from the first comparison result. If the comparison result remains substantially the same for a predetermined interval, an ADC is enabled to generate a second comparison result at a sampling instant. A second time stamp that corresponds to the sampling instant is generated. The second comparison result and a second time stamp corresponding to the first comparison result are registered, and a second portion of the digital signal is generated from the second comparison result.

Abstract translation: 提供了一种方法。 接收模拟信号。 将模拟输入信号与第一和第二参考信号进行比较以产生第一比较结果，并且登记与第一比较结果对应的第一比较结果和第一时间戳。 从第一比较结果生成数字信号的第一部分。 如果比较结果在预定间隔内保持基本相同，则ADC能够在采样时刻产生第二比较结果。 产生对应于采样时刻的第二时间戳。 登记与第一比较结果相对应的第二比较结果和第二时间戳，并且从第二比较结果生成数字信号的第二部分。

公开(公告)号：US07298207B2

公开(公告)日：2007-11-20

申请号：US10966981

申请日：2004-10-15

Applicant: Susan Yim ,  Udayan Dasgupta ,  Sandeep Oswal ,  Murtaza Ali

Inventor： Susan Yim ,  Udayan Dasgupta ,  Sandeep Oswal ,  Murtaza Ali

IPC: H03F3/04 ,  H03F3/68

CPC classification number: H03G3/001 ,  H03G1/0088 ,  H03G3/3036

Abstract: Systems and methods are disclosed for providing automatic gain control of a multi-stage system. A method can include defining at least one parameter that is adapted to at least one of maximize hardware capacity of each of a plurality of gain stages and mitigate part-to-part variations of the multi-stage system. An order is selected for training the plurality of stages based on relative noise dominance for the plurality of stage. For a given stage of the plurality of stages, which is selected according to the selected order, output signals of the multi-stage system are measured over a plurality of gain settings for the given stage. A gain setting of the given stage of the multi-stage system also is configured based on the measured output signals relative to the at least one parameter defined for the given stage. The plurality of gain stages can include an analog equalizer as well programmable gain amplifiers connected in series.

Abstract translation: 公开了用于提供多级系统的自动增益控制的系统和方法。 一种方法可以包括定义至少一个适于至少一个参数的参数，其中最小化多个增益级中的每一个的硬件容量并减轻多级系统的部分变化。 选择用于基于多个级的相对噪声优势来训练多个级的顺序。 对于根据所选择的顺序选择的多个级的给定级，在给定级的多个增益设置上测量多级系统的输出信号。 基于相对于为给定阶段定义的至少一个参数的测量输出信号，配置多级系统的给定级的增益设置。 多个增益级可以包括串联连接的模拟均衡器以及可编程增益放大器。

公开(公告)号：US20060062289A1

公开(公告)日：2006-03-23

申请号：US11233452

申请日：2005-09-22

Applicant: Channamallesh Hiremath ,  Udayan Dasgupta ,  Zigang Yang ,  Umashanker Iyer ,  Michael Locke

Inventor： Channamallesh Hiremath ,  Udayan Dasgupta ,  Zigang Yang ,  Umashanker Iyer ,  Michael Locke

IPC: H04L5/16 ,  H04K1/10

CPC classification number: H04L5/006 ,  H04L1/0071 ,  H04L1/04 ,  H04L5/0007 ,  H04L5/0044 ,  H04L27/2647

Abstract: A system and method for reordering tones of a DMT signal within a communication system is described. Cross tone correlated noise in a received signal is identified and rearranged such that tones with correlated noise are spread out throughout the received signal before being processed by a decoder such as, Viterbi decoder. In an embodiment, two tones with the most correlated noise are placed at each end of the sequence of tones presented to the Viterbi decoder. In some embodiment, the tones with correlated noise can be spread such that two adjacent tones with correlated noise have a minimum distance of at least three tones between them at the input to the Viterbi decoder. In other embodiment, tones in the received signal can be processed in various kinds of interleavers for reordering according to the interleaver scheme.

Abstract translation: 描述了用于在通信系统内重新排序DMT信号的音调的系统和方法。 识别和重新排列接收信号中的交叉音相关噪声，使得具有相关噪声的音调在由诸如维特比解码器之类的解码器处理之前，在整个接收信号中被扩展。 在一个实施例中，具有最相关噪声的两个音调被放置在呈现给维特比解码器的音调序列的每一端。 在一些实施例中，可以扩展具有相关噪声的音调，使得具有相关噪声的两个相邻音调在维特比解码器的输入处具有至少三个音调的最小距离。 在其他实施例中，可以根据交织器方案在各种交织器中处理接收信号中的音调以进行重新排序。

公开(公告)号：US20050026572A1

公开(公告)日：2005-02-03

申请号：US10628160

申请日：2003-07-28

Applicant: Udayan Dasgupta ,  Zigang Yang ,  Arthur Refern ,  Murtaza Ali

Inventor： Udayan Dasgupta ,  Zigang Yang ,  Arthur Refern ,  Murtaza Ali

IPC: H04L1/20 ,  H04B1/04

CPC classification number: H04L1/20 ,  H04B3/487

Abstract: A noise determiner for use with a communications system, a method of determining noise in a communications system and a digital subscriber line (DSL) modem. In one embodiment, the noise determiner includes (1) a crosstalk identifier that detects directly a noise source in a frequency domain from observed noise associated with the communications system and (2) a crosstalk estimator coupled to the crosstalk identifier and that provides a corresponding level of the noise source.

Abstract translation: 用于通信系统的噪声确定器，确定通信系统和数字用户线（DSL）调制解调器中的噪声的方法。 在一个实施例中，噪声确定器包括（1）串扰标识符，其从与通信系统相关联的观察到的噪声直接检测频域中的噪声源，以及（2）耦合到串扰标识符的串扰估计器，并且提供相应级别 的噪声源。