公开(公告)号：US20050141611A1

公开(公告)日：2005-06-30

申请号：US10504050

申请日：2003-02-12

申请人： Daniel Snook ,  Yves Ramanzin

发明人： Daniel Snook ,  Yves Ramanzin

IPC分类号： H03M7/30 ,  H04N7/24 ,  H04N7/26 ,  H04N7/32 ,  H04N7/46 ,  H04N7/12

CPC分类号： H04N21/23406 ,  H04N19/103 ,  H04N19/132 ,  H04N19/149 ,  H04N19/152 ,  H04N19/31 ,  H04N19/50 ,  H04N19/577 ,  H04N19/587 ,  H04N21/234327

摘要： The invention relates to encoding of an input sequence of digital images delivering a base and an enhancement layer bitstream for transmission of video data in real time over a fluctuating-rate transmission channel. The method distributes the encoded data for the images of said sequence between two subsequences of base and an enhancement layer and evaluates degree of occupation of two associated buffers. A notional (virtual, dummy) bi-directional image is created in one of the subsequences which is intended to receive stuffing data, when the degree of occupation on the buffer associated with said subsequences isbelow a predetermined threshold. This method enables the adding of stuffing data in a case not provided for by the MPEG-4 standard, for example, for a sequence encoded in the rectangular mode and having no (regularly coded) bi-directional images (B-frames).

摘要翻译： 本发明涉及一种数字图像的输入序列的编码，该数字图像传送用于在波动率传输信道上实时传输视频数据的基本和增强层比特流。 该方法在基站和增强层的两个子序列之间分配用于所述序列的图像的编码数据，并评估两个相关缓冲器的占用程度。 当与所述子序列相关联的缓冲器上的占用程度低于预定阈值时，在旨在接收填充数据的子序列之一中创建概念（虚拟，虚拟）双向图像。 该方法能够在不由MPEG-4标准提供的情况下添加填充数据，例如，对于以矩形模式编码并且没有（有规则编码的）双向图像（B帧）的序列。

公开(公告)号：US20050013692A1

公开(公告)日：2005-01-20

申请号：US10620365

申请日：2003-07-17

申请人： Daniel Snook ,  Peter Cleveland

发明人： Daniel Snook ,  Peter Cleveland

IPC分类号： F01D5/14 ,  F01D5/20 ,  F01D5/22 ,  B63H1/16

CPC分类号： F01D5/225 ,  F05D2250/70

摘要： A turbine bucket includes a bucket airfoil having a tip shroud with leading and trailing edges defining leading and trailing edge profiles substantially in accordance with Cartesian coordinate values of X and Y at points 12-20 and 1-11, respectively, set forth in Table I. The X and Y values are distances in inches which, when respective points 12-20 and 1-11 are connected by smooth, continuing arcs, define the leading and trailing edge tip shroud profiles. An airfoil profile at 95% span is defined by Cartesian coordinate values of X, Y and Z in Table II having the same X, Y origin along the radial Z axis as the origin of Table I. The profiled leading and trailing edges of the tip shroud relative to the airfoil profile afford optimum tip shroud mass distribution which maximizes creep life of the bucket. Stage efficiency is also improved by providing a tip shroud covering the airfoil throat.

摘要翻译： 涡轮机桶包括具有尖端护罩的铲斗翼型件，其前缘和后缘基本上根据表I中所示的点12-20和1-11处的X和Y的笛卡尔坐标值来定义前缘和后缘轮廓 X和Y值是以英寸为单位的距离，当各个点12-20和1-11通过平滑连续的弧连接时，可以定义前缘和后缘尖端护罩轮廓。 95％跨度的翼型轮廓由表II中的X，Y和Z的笛卡尔坐标值定义为具有相同的X，Y原点沿着径向Z轴作为表I的原点。尖端的成型前缘和后缘 相对于翼型轮廓的护罩提供最佳的尖端护罩质量分布，其最大化铲斗的蠕变寿命。 通过提供覆盖翼型喉部的尖端护罩也提高了阶段效率。

公开(公告)号：US06654420B1

公开(公告)日：2003-11-25

申请号：US09698771

申请日：2000-10-27

申请人： Daniel Snook

发明人： Daniel Snook

IPC分类号： H04N712

CPC分类号： H04N19/105 ,  H04N19/112 ,  H04N19/137 ,  H04N19/56 ,  H04N19/577

摘要： The MPEG-4 standard describes four prediction modes: a direct prediction mode, a bidirectional prediction mode, a forward prediction mode, and a backward prediction mode. These modes may be used for the encoding of a block on the basis of a past reference frame and a future reference frame. Thus, for the encoding of a given block, the invention provides an advantageous strategy leading to the choice of a well adapted prediction mode among the four possible ones. The proposed strategy works in favor of the direct mode and gives criteria to be satisfied when using this particular prediction mode.

摘要翻译： MPEG-4标准描述了四种预测模式：直接预测模式，双向预测模式，前向预测模式和后向预测模式。 这些模式可以用于基于过去的参考帧和未来参考帧的块的编码。 因此，对于给定块的编码，本发明提供了一种有利的策略，导致在四个可能的块中选择良好适应的预测模式。 所提出的策略有利于直接模式，并在使用这种特定的预测模式时给出满足的标准。

公开(公告)号：US20050259732A1

公开(公告)日：2005-11-24

申请号：US10531027

申请日：2003-10-13

申请人： Marc Drieux ,  Francoise Groliere ,  Daniel Snook

发明人： Marc Drieux ,  Francoise Groliere ,  Daniel Snook

IPC分类号： G06T9/00 ,  H04N7/36 ,  H04N7/50 ,  H04N7/12

CPC分类号： H04N19/114 ,  H04N19/139 ,  H04N19/503 ,  H04N19/61

摘要： The present invention relates to an encoding method processing video object planes (VOPs) of I, P or B type and including a dynamic allocation of said VOPs. According to said method, for each input frame a preliminary forward motion estimation is carried out between current and previous frames. Current and previous motion fields are then used to evaluate a coherence factor, expressed as connected to the sums of local differences within current and previous motion field. According to the value of the coherence factor with respect to an empirically determined threshold, a decision is finally taken on the type of the frame to be coded.

摘要翻译： 本发明涉及一种处理I，P或B类视频对象平面（VOP）的编码方法，包括所述VOP的动态分配。 根据所述方法，对于每个输入帧，在当前帧和先前帧之间执行初步前向运动估计。 然后使用当前和先前的运动场来评估相干因子，表示为与当前运动场和先前运动场中的局部差异之和相关。 根据相干因子相对于经验确定的阈值的值，最终决定要编码的帧的类型。

公开(公告)号：US06442204B1

公开(公告)日：2002-08-27

申请号：US09559896

申请日：2000-04-26

申请人： Daniel Snook ,  Françoise Groliere ,  Jean Gobert

发明人： Daniel Snook ,  Françoise Groliere ,  Jean Gobert

IPC分类号： H04N736

CPC分类号： H04N19/577 ,  H04N19/107 ,  H04N19/114 ,  H04N19/137 ,  H04N19/139 ,  H04N19/142 ,  H04N19/177 ,  H04N19/179 ,  H04N19/61 ,  H04N19/87

摘要： In the Improved PB-frames mode, one of the options of the H.263+ Recommendation, a macroblock of a B-frame may be encoded according to a forward, a backward or a bidirectional prediction mode. The invention relates to a method of encoding a sequence of pictures defining a strategy for the choice of a prediction mode among the three possible ones in the encoding of B-macroblock. This strategy is based upon SAD(Sum of Absolute Difference) calculations and motion vectors coherence and allows to use backward prediction when scene cuts occur. The calculations are here performed on original pictures allowing less calculation and reduction in CPU burden. The invention also relates to an encoding system for carrying out said method and including a computer-readable medium storing instructions that allow the implementation of this method.

摘要翻译： 在改进的PB帧模式中，可以根据前向，后向或双向预测模式对H.263 +建议书的选项之一，B帧的宏块进行编码。 本发明涉及一种对B帧的编码中的三个可能的预测模式的选择策略进行定义的图像序列的编码方法。 该策略基于SAD（绝对差值）计算和运动矢量相干性，并允许在出现场景切换时使用反向预测。 这些计算在原始图片上执行，允许较少的计算和减少CPU负担。 本发明还涉及一种用于执行所述方法并包括存储允许实施该方法的指令的计算机可读介质的编码系统。

公开(公告)号：US20080101938A1

公开(公告)日：2008-05-01

申请号：US11586765

申请日：2006-10-26

申请人： William Zemitis ,  Christopher Johnson ,  Daniel Snook

发明人： William Zemitis ,  Christopher Johnson ,  Daniel Snook

IPC分类号： F01D5/30

CPC分类号： F01D5/30 ,  F05D2230/10 ,  F05D2260/941

摘要： A turbine blade that may include an airfoil and a blade dovetail, the blade dovetail being shaped corresponding to a dovetail slot in a turbine disk. The blade dovetail may include a dovetail backcut sized and positioned according to blade geometry to maximize a balance between stress reduction on the disk, stress reduction on the blade, a useful life of the turbine blade, and maintaining or improving the aeromechanical behavior of the turbine blade. A start point of the dovetail backcut, which defines a length of the dovetail backcut along a dovetail axis, may be determined relative to a datum line positioned a fixed distance from a forward face of the blade dovetail along a centerline of the dovetail axis. The start point of the dovetail backcut may be at least approximately 1.645 inches in an aft direction from the datum line.

摘要翻译： 涡轮机叶片，其可以包括翼型件和叶片燕尾榫，叶片燕尾形成对应于涡轮盘中的燕尾槽。 刀片燕尾形可以包括根据叶片几何尺寸和定位的燕尾形后刀，以最大化盘上的应力减小，叶片上的应力减小，涡轮叶片的使用寿命以及维持或改善涡轮机的机械性能之间的平衡 刀。 可以相对于沿着燕尾轴线的中心线与叶片燕尾榫的前面定位的固定距离的基准线来确定燕尾形背切的开始点，其沿着燕尾轴线限定燕尾背部的长度。 燕尾背切的起始点可以距离基准线在后方至少约1.645英寸。

公开(公告)号：US20080101937A1

公开(公告)日：2008-05-01

申请号：US11586764

申请日：2006-10-26

申请人： William Zemitis ,  Robert St. Louis ,  Daniel Snook

发明人： William Zemitis ,  Robert St. Louis ,  Daniel Snook

IPC分类号： F01D5/30

CPC分类号： F01D5/3007 ,  F05D2230/10 ,  F05D2250/70 ,  F05D2260/941

摘要： A turbine blade that may include an airfoil and a blade dovetail, the blade dovetail being shaped corresponding to a dovetail slot in a turbine disk. The blade dovetail may include a dovetail backcut sized and positioned according to blade geometry to maximize a balance between stress reduction on the disk, stress reduction on the blade, a useful life of the turbine blade, and maintaining or improving the aeromechanical behavior of the turbine blade. A start point of the dovetail backcut, which defines a length of the dovetail backcut along a dovetail axis, may be determined relative to a datum line positioned a fixed distance from a forward face of the blade dovetail along a centerline of the dovetail axis. The start point of the dovetail backcut may be at least approximately 1.539 inches in an aft direction from the datum line.

摘要翻译： 涡轮机叶片，其可以包括翼型件和叶片燕尾榫，叶片燕尾形成对应于涡轮盘中的燕尾槽。 刀片燕尾形可以包括根据叶片几何尺寸和定位的燕尾形后刀，以最大化盘上的应力减小，叶片上的应力减小，涡轮叶片的使用寿命以及维持或改善涡轮机的机械性能之间的平衡 刀。 可以相对于沿着燕尾轴线的中心线与叶片燕尾榫的前面定位的固定距离的基准线来确定燕尾形背切的开始点，其沿着燕尾轴线限定燕尾背部的长度。 燕尾背切的起始点可以距离基准线在后方向至少约1.539英寸。

公开(公告)号：US20060275129A1

公开(公告)日：2006-12-07

申请号：US11476109

申请日：2006-06-28

申请人： Daniel Snook

发明人： Daniel Snook

IPC分类号： F01D5/30

CPC分类号： F01D5/3007 ,  F05D2230/10 ,  F05D2250/70 ,  F05D2260/941

摘要： Blade load path on a gas turbine disk can be diverted to provide a significant disk fatigue life benefit. A plurality of gas turbine blades are attachable to a gas turbine disk, where each of the gas turbine blades includes a blade dovetail engageable in a correspondingly-shaped dovetail slot in the gas turbine disk. In order to reduce gas turbine disk stress, an optimal material removal area is defined according to blade and/or disk geometry to maximize a balance between stress reduction on the gas turbine disk, a useful life of the gas turbine blade, and maintaining or improving the aeromechanical behavior of the gas turbine blade. Removing material from the material removal area effects the maximized balance.

摘要翻译： 可以转向燃气轮机盘上的叶片负载路径以提供显着的盘疲劳寿命益处。 多个燃气轮机叶片可附接到燃气涡轮盘，其中每个燃气轮机叶片包括可接合在燃气涡轮盘中的相应形状的燕尾槽中的叶片燕尾榫。 为了减少燃气轮机盘应力，根据叶片和/或盘几何形状来定义最佳材料去除面积，以最大化燃气轮机盘上的应力减小，燃气轮机叶片的使用寿命和维持或改进之间的平衡 燃气轮机叶片的机械性能。 从材料去除区域去除材料会最大化平衡。

公开(公告)号：US06608937B1

公开(公告)日：2003-08-19

申请号：US09558775

申请日：2000-04-26

申请人： Daniel Snook ,  Jean Gobert

发明人： Daniel Snook ,  Jean Gobert

IPC分类号： G06K936

CPC分类号： H04N19/577 ,  H04N19/107 ,  H04N19/114 ,  H04N19/137 ,  H04N19/142 ,  H04N19/176 ,  H04N19/177 ,  H04N19/179 ,  H04N19/61 ,  H04N19/87

摘要： In the Improved PB-frames mode, one of the options of the H.263+ Recommendation, a macroblock of a B-frame may be encoded according to a forward, a backward or a bidirectional prediction mode. The invention relates to a method of encoding a sequence of pictures defining a strategy for the choice of a prediction mode among the three possible ones in the encoding of B-macroblock. This strategy is based upon SAD(Sum of Absolute Difference) calculations and motion vectors coherence and allows to use backward prediction when scene cuts occur. In the proposed strategy, the SAD of the bidirectional prediction is not necessarily derived when the motion is non linear allowing less calculation and reduction in CPU burden. The invention also relates to an encoding system for carrying out said method and including a computer-readable medium storing instructions that allow the implementation of this method.

摘要翻译： 在改进的PB帧模式中，可以根据前向，后向或双向预测模式对H.263 +建议书的选项之一，B帧的宏块进行编码。 本发明涉及一种对B帧的编码中的三个可能的预测模式的选择策略进行定义的图像序列的编码方法。 该策略基于SAD（绝对差值）计算和运动矢量相干性，并允许在出现场景切换时使用反向预测。 在提出的策略中，当运动非线性时，双向预测的SAD不一定会导致较少的计算和减少CPU负担。 本发明还涉及一种用于执行所述方法并包括存储允许实施该方法的指令的计算机可读介质的编码系统。

公开(公告)号：US20070009349A1

公开(公告)日：2007-01-11

申请号：US11160809

申请日：2005-07-11

申请人： John Ward ,  Kevin Worley ,  Daniel Snook

发明人： John Ward ,  Kevin Worley ,  Daniel Snook

IPC分类号： F03B11/00

CPC分类号： F01D25/246 ,  F01D11/08 ,  F01D25/12 ,  F05D2240/11 ,  F05D2260/201

摘要： An impingement box for a turbine shroud. The impingement box may include a first side with an air access aperture positioned therein and a second side with a number of impingement holes positioned therein. The second side may be positioned a predetermined distance above a floor of the shroud such that the impingement holes provide a cooling flow to the floor of the shroud.

摘要翻译： 用于涡轮机护罩的冲击箱。 冲击箱可以包括具有定位在其中的空气进入孔的第一侧和其中定位有多个冲击孔的第二侧。 第二侧可以定位在护罩的地板上方的预定距离处，使得冲击孔提供到护罩的地板的冷却流。