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    • 55. 发明授权
    • Dynamic parity inversion for I/O interconnects
    • I / O互连的动态奇偶校验反转
    • US06718512B2
    • 2004-04-06
    • US10360339
    • 2003-02-06
    • Randy B. OsborneJasmin Ajanovic
    • Randy B. OsborneJasmin Ajanovic
    • G06F1100
    • H04L1/0061H04L1/004H04L7/0083H04L7/048
    • A method of detecting synchronization errors during the transfer of data in which a transmitting agent sends to the receiving agent either: (a) data parity encoded with a data parity function when the transmitting agent encodes data in one or more clock signals, or (b) header parity encoded with a header parity function when the transmitting agent encodes header information in the one or more clock signals. A synchronization error condition is detected when the receiving agent either: (a) is configured to receive the data parity and actually receives the header parity, or (b) is configured to receive the header parity and actually receives the data parity.
    • 或者(b)在发送代理向接收代理发送的数据的传送期间检测同步错误的方法:(a)当发送代理在一个或多个时钟信号中对数据进行编码时,(a)用数据奇偶校验功能编码的数据奇偶校验, )标题奇偶校验,当发送代理编码一个或多个时钟信号中的标题信息时,用标题奇偶校验功能编码。 当接收方:(a)被配置为接收数据奇偶校验并且实际接收到标题奇偶校验时,或者(b)被配置为接收标题奇偶校验并实际接收数据奇偶校验,则检测到同步错误状况。
    • 57. 发明授权
    • Super-sampling and gradient estimation in a ray-casting volume rendering system
    • 射线投射体绘制系统中的超采样和梯度估计
    • US06483507B2
    • 2002-11-19
    • US09862901
    • 2001-05-22
    • Randy B. OsborneIngmar BitterHanspeter PfisterJames KnittelHugh C. Lauer
    • Randy B. OsborneIngmar BitterHanspeter PfisterJames KnittelHugh C. Lauer
    • G06T1500
    • G06T15/08G06T15/005G06T15/10
    • A volume rendering processor renders a two-dimensional image from a volume data set of voxels constituting a three-dimensional representation of an object. Voxel memory interface logic retrieves the voxels from a voxel memory in a scanned order with respect to X, Y and Z coordinate axes, the Z axis being the axis most nearly parallel to a predefined viewing direction. The set of voxels having equal Z coordinate values are referred to as a “slice” of voxels. Interpolation logic calculates a sequence of samples from the retrieved voxels such that (i) each sample lies along a corresponding imaginary ray extending through the object parallel to the viewing direction, (ii) each sample results from interpolating the eight voxels surrounding the sample in the XYZ coordinate system. “Supersampling” in the Z dimension is performed such that the number of samples calculated for each ray is greater than the number of slices of voxels in the volume data set. Gradient calculation logic calculates for each sample respective gradients in the X, Y and Z directions for use by classification and illumination logic. The X and Y gradients are calculated from the samples emitted by the interpolation logic, and Z gradients are calculated by (i) calculating Z gradients at the voxel positions from voxel values retrieved from memory, and (ii) interpolating the voxel Z gradients to arrive at the Z gradients at the sample positions.
    • 体绘制处理器从构成对象的三维表示的体素数据集合呈现二维图像。 体素存储器接口逻辑以相对于X,Y和Z坐标轴的扫描顺序从体素存储器检索体素,Z轴是最接近平行于预定观察方向的轴。 具有相等Z坐标值的一组体素被称为体素的“切片”。 插值逻辑从所检索的体素计算样本序列,使得(i)每个样本沿着平行于观察方向延伸穿过物体的相应假想射线位于(ii)每个样本由内插样本周围的八个体素 XYZ坐标系。 执行Z维度中的“超采样”,使得针对每个射线计算的样本数量大于体数据集中体素的数量。 梯度计算逻辑计算X,Y和Z方向上每个样本各个梯度的分类和照明逻辑使用的梯度。 由内插逻辑发射的样本计算X和Y梯度,并且(i)通过(i)从存储器检索的体素值计算体素位置处的Z梯度来计算Z梯度,以及(ii)内插体素Z梯度以到达 在Z样品位置的梯度。
    • 58. 发明授权
    • Volume rendering pipelines
    • 体积渲染管线
    • US06243098B1
    • 2001-06-05
    • US09318344
    • 1999-05-25
    • Hugh C. LauerRandy B. OsborneHanspeter Pfister
    • Hugh C. LauerRandy B. OsborneHanspeter Pfister
    • G06T1500
    • G06T15/08G06T1/60G06T15/005G06T15/40
    • An apparatus renders a volume data set including a plurality of voxels stored in a voxel memory. The apparatus includes a plurality of pipelines operating in parallel. Each pipeline includes a buffer storing at least one block of at least two voxels of the volume data set. An interpolation stage reads the at least one block of at least two voxels from the buffer. A gradient estimation stage receives an output from the interpolation stage. A compositing stage receives an output from the gradient estimation stage. The apparatus also includes a plurality of interface devices, wherein each interface device couples a particular stage only to an adjacent identical stage in a neighboring pipeline so that identical stages of the pipelines are connected in a ring.
    • 装置呈现包括存储在体素存储器中的多个体素的体数据集。 该装置包括并行操作的多条管线。 每个流水线包括存储体数据集的至少两个体素的至少一个块的缓冲器。 内插级从缓冲器读取至少两个体素的至少一个块。 梯度估计级接收来自插值级的输出。 合成阶段接收梯度估计阶段的输出。 该设备还包括多个接口设备,其中每个接口设备仅将特定级联在相邻管线中的相邻相同级,使得管道的相同级连接在环中。
    • 59. 发明授权
    • Network interface having support for allowing remote operations with
reply that bypass host computer interaction
    • US5909546A
    • 1999-06-01
    • US614834
    • 1996-03-08
    • Randy B. Osborne
    • Randy B. Osborne
    • G06F13/00G06F13/12H04L12/56H04Q3/00G06F15/16
    • G06F13/128H04L49/90
    • A network interface for a connection-based communication network has support for remote operations with reply, such as a remote read operation, that bypass host computer interaction. Such a network interface has support for general message processing operations which bypass host processor involvement. Message processing is low level processing of message between the host computer and the network. Such processing is performed on transmission in response to control information provided by the host and is performed on reception in response to control information included in incoming messages. Message processing includes low latency remote read and remote write operations, message filtering, and message demultiplexing. Such a network interface handles incoming messages containing destination control information indicating an operation to be performed, and possibly one or more operands. The network interface processes destination control information from a received message using a message coprocessor or equivalent operational logic. For such a network interface to support message processing, it includes mechanisms for extracting destination control information from a message and for inserting destination control information into a message. The network interface maintains information for each connection that indicates where the destination control information is located in any message received or transmitted over the connection. By providing for a queue of transmit requests between the receive and transmit sides on the network interface, support is provided for remote read operations or other operations invoking a reply which bypass the host processor. The queue can be appended by the receive side in response to a message processing operation performed on a received message. The queue is read by the transmit side to generate an outgoing message as if the queue provided transmit requests like the host computer.