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    • 2. 发明授权
    • Method and apparatus for self-throttling video FIFO
    • 自我调节视频FIFO的方法和装置
    • US5767862A
    • 1998-06-16
    • US616546
    • 1996-03-15
    • Subramanian KrishnamurthyJames PetersonPaul Shupak
    • Subramanian KrishnamurthyJames PetersonPaul Shupak
    • G09G5/00G09G5/395
    • G09G5/395
    • A method and an apparatus for writing display data to and reading display data from a FIFO. In one embodiment of the present invention, a memory controller coupled to a memory is configured to retrieve display data from the memory and write the retrieved data to a FIFO. The memory controller retrieves the display data from the memory in response to a FIFO write signal received from an output display controller. The output display controller is further configured to generate a FIFO read signal which is received by the FIFO. In response to the FIFO read signal, display data entries are sequentially read from the FIFO and transferred to an output display. The present invention features a programmable memory circuit such as a register, configured to store the value pointing to a particular display data entry in the FIFO. When the particular display data entry is read, a subsequent FIFO write signal is issued to the memory controller. The value stored in the programmable memory circuit is chosen to minimize the occurrences of overflow and underflow conditions in the FIFO. In addition, the present invention features a self-adjusting, or self-throttling aspect which provides the present invention with the capability to dynamically adapt to different computer system configurations having different system clock and video clock frequencies.
    • 一种用于向FIFO写入显示数据并从其读取显示数据的方法和装置。 在本发明的一个实施例中,耦合到存储器的存储器控​​制器被配置为从存储器检索显示数据并将检索的数据写入FIFO。 存储器控制器响应于从输出显示控制器接收到的FIFO写信号,从存储器检索显示数据。 输出显示控制器还被配置为产生由FIFO接收的FIFO读信号。 响应于FIFO读信号,显示数据条目从FIFO顺序读取并传送到输出显示。 本发明具有诸如寄存器的可编程存储器电路,其被配置为存储指向FIFO中的特定显示数据条目的值。 当读取特定显示数据条目时,向存储器控制器发出随后的FIFO写入信号。 存储在可编程存储器电路中的值被选择以最小化FIFO中溢出和下溢条件的发生。 此外,本发明具有自调节或自节流方面,其提供本发明动态适应具有不同系统时钟和视频时钟频率的不同计算机系统配置的能力。
    • 3. 发明授权
    • Pixel engine pipeline processor data caching mechanism
    • 像素引擎管道处理器数据缓存机制
    • US5761720A
    • 1998-06-02
    • US616540
    • 1996-03-15
    • Subramanian KrishnamurthyJames PetersonGlenn PooleWalt Donovan
    • Subramanian KrishnamurthyJames PetersonGlenn PooleWalt Donovan
    • G06F9/38G06F12/08G06T1/20G06T1/60
    • G06F12/0862G06F12/0875G06F9/383G06F12/0848
    • A method and an apparatus for providing requested data to a pipeline processor. A pipeline processor in a graphics computer system is provided with a data caching mechanism which supplies requested data to one of the stages in the pipeline processor after a request from a prior stage in the pipeline processor. With the sequential nature of the pipeline processor, a prior stage which knows in advance the data which will be requested by a subsequent stage can make a memory request to the data caching mechanism. When processing reaches the subsequent stage in the pipeline processor, the displayed data caching mechanism provides the requested data to the subsequent processing stage with minimal or no lag time from memory access. In addition, the data caching mechanism includes an adaptive cache memory which is optimized to provide maximum performance based on the particular mode in which the associated pipeline processor is operating. Furthermore, the adaptive cache includes an intelligent replacement policy based on a direction in which data is being read from memory as well as the particular mode in which the associated pipeline processor is operating.
    • 一种用于向流水线处理器提供所请求的数据的方法和装置。 在图形计算机系统中的流水线处理器设置有数据缓存机制,该数据缓存机制在流水线处理器中的先前阶段的请求之后,将所请求的数据提供给流水线处理器中的一个级。 利用流水线处理器的顺序性质,预先知道将由后续阶段请求的数据的先前阶段可以向数据高速缓存机制提供存储器请求。 当处理到达流水线处理器的后续阶段时,显示的数据高速缓存机制将所请求的数据提供给随后的处理级,具有从存储器访问的最小或没有滞后时间。 另外,数据高速缓存机制包括一个自适应高速缓冲存储器,该自适应缓存存储器被优化以根据相关流水线处理器正在操作的特定模式来提供最大性能。 此外,自适应高速缓存包括基于从存储器读取数据的方向以及相关联的流水线处理器正在操作的特定模式的智能替换策略。
    • 5. 发明申请
    • COMPENSATION OF ELECTROMAGNETIC INTERFERING FIELDS
    • 电磁干扰场的补偿
    • US20110144953A1
    • 2011-06-16
    • US12814754
    • 2010-06-14
    • Peter KroppSubramanian Krishnamurthy
    • Peter KroppSubramanian Krishnamurthy
    • G06F19/00
    • G05F7/00
    • A system for compensating electromagnetic interfering fields is provided that includes two triaxial magnetic field sensors for outputting real sensor signals; six compensation coils, which are arranged as a cage around an object to be protected, and may individually be actuated; a control unit having six inputs, and six outputs, and a digital processor receiving the sensor signals on the input side, and processing the signals to control signals for the compensation coils. The real sensor signals are converted to virtual sensor signals by a first matrix multiplication for mapping the interfering fields at the location of the object. The virtual sensor signals are made to modified signals by an operator describing the controller structure. The modified signals are converted to real control signals by a second matrix multiplication, which control signals are individually fed to the six compensation coils.
    • 提供一种用于补偿电磁干扰场的系统,其包括用于输出实际传感器信号的两个三轴磁场传感器; 六个补偿线圈被布置为围绕待保护物体的笼,并且可以单独地致动; 具有六个输入和六个输出的控制单元,以及在输入侧接收传感器信号的数字处理器,并处理该信号以控制补偿线圈的信号。 通过第一矩阵乘法将真实的传感器信号转换成虚拟传感器信号,用于映射对象位置处的干扰场。 虚拟传感器信号由描述控制器结构的操作员进行修改的信号。 修改的信号通过第二矩阵乘法转换为实际控制信号,该控制信号被分别馈送到六个补偿线圈。
    • 7. 发明授权
    • Non-intrusive network-based analysis of facsimile transmissions
    • 传真传输的非侵入式网络分析
    • US5490199A
    • 1996-02-06
    • US839972
    • 1992-02-21
    • Richard C. FullerThomas W. GoeddelR. B. HeickMartin HerzlingerSubramanian Krishnamurthy
    • Richard C. FullerThomas W. GoeddelR. B. HeickMartin HerzlingerSubramanian Krishnamurthy
    • H04L12/26H04N1/00H04M11/00H04M1/24
    • H04N1/0001H04L12/26H04L43/00H04N1/00002H04N1/00029H04N1/00034H04N1/00039H04N1/0005H04N1/00061H04N1/00074
    • Non-intrusive monitoring and analysis of real-time facsimile transmissions is accomplished. Analog impairment measurements are made on the high speed page signal in those transmissions and protocol analysis is made on the low speed control messages in those transmissions. These measurements and analysis are a powerful tool for trouble shooting service problems afflicting facsimile transmissions. Real customer traffic can be monitored to detect circuit impairments and to evaluate service being provided. A selected incoming trunk of a central office switch is accessed and a monitoring function with respect to that trunk is established. A signal classification operation is performed, which identifies the presence of a facsimile transmission and what kind of facsimile transmission it is. When the classification operation has determined the presence and nature of a facsimile transmission, a series of non-intrusive impairment measurements is made using the page information sent in the course of the facsimile transmission. Analog transmission impairments are identified along with signal to noise performance. Echo and delay measurements are also taken and the protocols are tracked. The measurement data is collected and analyzed to ascertain whether or not the facsimile transmission was normal. A diagnostic module uses the measurements to determine why any given transmission was abnormal.
    • 实现了实时传真传输的非侵入式监控和分析。 在这些传输中对高速页面信号进行模拟损伤测量,并对这些传输中的低速控制消息进行协议分析。 这些测量和分析是影响传真传输的服务问题的有效工具。 可以监控真实的客户流量以检测电路损伤并评估所提供的服务。 访问中心局交换机的选定的进入中继线,并建立相对于该中继线的监控功能。 执行信号分类操作,其识别传真传输的存在以及它是什么样的传真传输。 当分类操作确定传真传输的存在和性质时,使用在传真传输过程中发送的页面信息进行一系列非侵入性损害测量。 识别模拟传输损伤以及信噪比性能。 还进行回波和延迟测量,并跟踪协议。 收集和分析测量数据,以确定传真传输是否正常。 诊断模块使用测量来确定为什么给定的传输异常。
    • 9. 发明授权
    • Compensation of electromagnetic interfering fields
    • 电磁干扰场补偿
    • US08433545B2
    • 2013-04-30
    • US12814754
    • 2010-06-14
    • Peter KroppSubramanian Krishnamurthy
    • Peter KroppSubramanian Krishnamurthy
    • H03F1/26H01J29/06H01H47/00G01C17/38
    • G05F7/00
    • A system for compensating electromagnetic interfering fields is provided that includes two triaxial magnetic field sensors for outputting real sensor signals; six compensation coils, which are arranged as a cage around an object to be protected, and may individually be actuated; a control unit having six inputs, and six outputs, and a digital processor receiving the sensor signals on the input side, and processing the signals to control signals for the compensation coils. The real sensor signals are converted to virtual sensor signals by a first matrix multiplication for mapping the interfering fields at the location of the object. The virtual sensor signals are made to modified signals by an operator describing the controller structure. The modified signals are converted to real control signals by a second matrix multiplication, which control signals are individually fed to the six compensation coils.
    • 提供一种用于补偿电磁干扰场的系统,其包括用于输出实际传感器信号的两个三轴磁场传感器; 六个补偿线圈被布置为围绕待保护物体的笼,并且可以单独地致动; 具有六个输入和六个输出的控制单元,以及在输入侧接收传感器信号的数字处理器,并处理该信号以控制补偿线圈的信号。 通过第一矩阵乘法将真实的传感器信号转换成虚拟传感器信号,用于映射对象位置处的干扰场。 虚拟传感器信号由描述控制器结构的操作员进行修改的信号。 修改的信号通过第二矩阵乘法转换为实际控制信号,该控制信号被分别馈送到六个补偿线圈。