公开(公告)号：US07170933B2

公开(公告)日：2007-01-30

申请号：US10318846

申请日：2002-12-13

申请人： Jack L. Kouloheris ,  Ligang Lu ,  Zhou Wang

发明人： Jack L. Kouloheris ,  Ligang Lu ,  Zhou Wang

IPC分类号： H04N7/12

CPC分类号： H04N17/004 ,  H04N19/154 ,  H04N19/61 ,  H04N19/86

摘要： A method to predict visual quality of a DCT (discrete cosine transform) based compressed image or video stream without referring to its source. When applied to an MPEG video stream, the method is based on (1) an estimation of quantization errors using MPEG quantization scales and statistics of the inverse quantized DCT coefficients, (2) a blind estimation of the 8×8 and 16×16 blocking effect, and (3) an adaptive combination of the quantization error estimation and the blocking effect estimation using the MPEG motion vector information. The method may be used in many applications, such as network video servers, switches and multiplexers for automatic quality monitoring and control of video services, video encoders, decoders, transcoders, and statistical multiplexers for picture quality optimization.

摘要翻译： 一种用于预测基于DCT（离散余弦变换）的压缩图像或视频流的视觉质量而不参考其源的方法。 当应用于MPEG视频流时，该方法基于（1）使用MPEG量化尺度的量化误差的估计和逆量化DCT系数的统计，（2）8×8和16×16阻塞效应的盲目估计，以及（ 3）使用MPEG运动矢量信息的量化误差估计和阻塞效应估计的自适应组合。 该方法可用于诸如网络视频服务器，交换机和多路复用器的许多应用中，用于视频服务的自动质量监控和控制，视频编码器，解码器，代码转换器和用于图像质量优化的统计复用器。

公开(公告)号：US07058127B2

公开(公告)日：2006-06-06

申请号：US09748832

申请日：2000-12-27

申请人： Ligang Lu ,  Cesar A. Gonzales ,  Jack L. Kouloheris ,  Shu Xiao

发明人： Ligang Lu ,  Cesar A. Gonzales ,  Jack L. Kouloheris ,  Shu Xiao

IPC分类号： H04B1/66

CPC分类号： H04N19/40

摘要： A system for transcoding compressed video signal, including a plurality of pictures, comprising an estimator to gather information and estimate the signal characteristics about the video signal; a decoder to completely or partially decode the compressed video signal; and an encoder to compress the reconstructed video signal according to a coding scheme devised on the estimated signal characteristics from the estimator.

公开(公告)号：US09268777B2

公开(公告)日：2016-02-23

申请号：US13557633

申请日：2012-07-25

申请人： Ligang Lu ,  Michael Peter Perrone

发明人： Ligang Lu ,  Michael Peter Perrone

IPC分类号： G06F17/30 ,  G06F19/00 ,  G01V1/00 ,  G01V1/38

CPC分类号： G06F17/30067 ,  G01V1/003 ,  G01V1/3808 ,  G01V2200/14 ,  G01V2210/667 ,  G06F17/30286 ,  G06F17/30592 ,  G06F17/30595 ,  G16H50/50

摘要： Systems and techniques for directing data collection. Upon an initial data collection, the uncertainty of all or of a portion or portions of the collected data is evaluated. The collected data may be associated with a region, with portions of the collected data associated with subregions. Further data collection, including changes to or refinement of collection techniques, is undertaken based on evaluations of the uncertainty. Further data collection may be undertaken only for portions of the data for which uncertainty exceeds a threshold. Uncertainty evaluation may be performed at least in part using a model. The model may be an initial hypothesis model, and the model may be optimized as further data is collected, and the optimized model may be used to guide further data collection techniques, with iterations of data collection and model optimization being carried out concurrently.

公开(公告)号：US09268776B2

公开(公告)日：2016-02-23

申请号：US13531887

申请日：2012-06-25

申请人： Ligang Lu ,  Michael Peter Perrone

发明人： Ligang Lu ,  Michael Peter Perrone

IPC分类号： G06F17/30 ,  G06F19/00 ,  G01V1/00 ,  G01V1/38

CPC分类号： G06F17/30067 ,  G01V1/003 ,  G01V1/3808 ,  G01V2200/14 ,  G01V2210/667 ,  G06F17/30286 ,  G06F17/30592 ,  G06F17/30595 ,  G16H50/50

摘要： Systems and techniques for directing data collection. Upon an initial data collection, the uncertainty of all or of a portion or portions of the collected data is evaluated. The collected data may be associated with a region, with portions of the collected data associated with subregions. Further data collection, including changes to or refinement of collection techniques, is undertaken based on evaluations of the uncertainty. Further data collection may be undertaken only for portions of the data for which uncertainty exceeds a threshold. Uncertainty evaluation may be performed at least in part using a model. The model may be an initial hypothesis model, and the model may be optimized as further data is collected, and the optimized model may be used to guide further data collection techniques, with iterations of data collection and model optimization being carried out concurrently.

摘要翻译： 用于指导数据收集的系统和技术。 在初始数据收集时，评估所收集数据的全部或部分或部分的不确定性。 收集的数据可以与区域相关联，其中部分收集的数据与子区域相关联。 根据对不确定性的评估，进一步收集数据，包括收集技术的改变或改进。 可以仅对不确定性超过阈值的数据的部分进行进一步的数据收集。 可以至少部分地使用模型来执行不确定性评估。 该模型可以是初始假设模型，并且可以在收集进一步数据时优化模型，并且可以使用优化模型来指导进一步的数据收集技术，同时进行数据收集和模型优化的迭代。

公开(公告)号：US09207991B2

公开(公告)日：2015-12-08

申请号：US13531799

申请日：2012-06-25

申请人： Ligang Lu ,  Michael Peter Perrone

发明人： Ligang Lu ,  Michael Peter Perrone

IPC分类号： G06F9/46 ,  G06F15/173 ,  G06F9/50

CPC分类号： G06F9/5083

摘要： Systems and techniques for computational load balancing. A problem space is partitioned into subspaces and the subspaces are assigned to processing nodes. The load of nodes associated with outer subspaces is compared with the load of nodes associated with inner subspaces, and partition boundary adjustments are made based on the relative loads of outer versus inner subspaces.

摘要翻译： 用于计算负载平衡的系统和技术。 问题空间被划分为子空间，子空间被分配给处理节点。 将与外部子空间相关联的节点的负载与与内部子空间相关联的节点的负载进行比较，并且基于外部与内部子空间的相对负载进行分区边界调整。

公开(公告)号：US20120316785A1

公开(公告)日：2012-12-13

申请号：US13363999

申请日：2012-02-01

申请人： Lurng-Kuo Liu ,  Ligang Lu ,  Michael P. Perrone

发明人： Lurng-Kuo Liu ,  Ligang Lu ,  Michael P. Perrone

IPC分类号： G06F19/00

CPC分类号： G01V1/303

摘要： A system, method and computer program product for seismic imaging implements a seismic imaging algorithm utilizing Reverse Time Migration technique requiring large communication bandwidth and low latency to convert a parallel problem into one solved using massive domain partitioning. Several aspects of the imaging problem are addressed, including very regular and local communication patterns, balanced compute and communication requirements, scratch data handling and multiple-pass approaches. The partitioning of the velocity model into processing blocks allows each sub-problem to fit in a local cache, increasing locality and bandwidth and reducing latency. The RTM seismic data processing utilizes data that includes combined shot data, i.e., shot data selected from amongst a plurality of shots that are combined at like spatial points of the volume.

摘要翻译： 用于地震成像的系统，方法和计算机程序产品使用需要大的通信带宽和低等待时间的逆时间迁移技术来实现地震成像算法，以将并行问题转换为使用大量域分割解决的问题。 解决了成像问题的几个方面，包括非常规则和本地通信模式，平衡的计算和通信要求，暂存数据处理和多通路方法。 将速度模型划分为处理块允许每个子问题适合本地缓存，增加局部性和带宽并减少延迟。 RTM地震数据处理利用包括组合拍摄数据的数据，即从在体积相似的空间点上组合的多个拍摄中选择的拍摄数据。

公开(公告)号：US08259804B2

公开(公告)日：2012-09-04

申请号：US11619560

申请日：2007-01-03

申请人： Ligang Lu

发明人： Ligang Lu

IPC分类号： H04N7/36

CPC分类号： H04N19/567 ,  H04N19/105 ,  H04N19/117 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/19 ,  H04N19/523 ,  H04N19/61 ,  H04N19/82

摘要： A method (and system) for coding a signal includes comparing a first prediction which is based upon a previously reconstructed signal to an actual signal to determine a first prediction error, comparing a second prediction which is based upon temporal filtering to the actual signal to determine a second prediction error, and selecting one of the first prediction error and the second prediction error.

摘要翻译： 用于编码信号的方法（和系统）包括将基于先前重建的信号的第一预测与实际信号进行比较，以确定第一预测误差，将基于时间滤波的第二预测与实际信号进行比较，以确定 第二预测误差，并且选择第一预测误差和第二预测误差中的一个。

公开(公告)号：US20110235869A1

公开(公告)日：2011-09-29

申请号：US12731579

申请日：2010-03-25

申请人： Ligang Lu ,  Brent Paulovicks ,  Michael Peter Perrone ,  Vadim Sheinin

发明人： Ligang Lu ,  Brent Paulovicks ,  Michael Peter Perrone ,  Vadim Sheinin

IPC分类号： G06K9/00

CPC分类号： G06T17/05 ,  G06T1/20 ,  G06T2200/28 ,  G06T2210/52

摘要： Techniques are disclosed for parallel computing of a line of sight (LoS) map (e.g., view-shed) in a parallel computing system. For example, a method for computing an LoS map comprises the following steps. Data representing at least one image is obtained. An observation point in the at least one image is identified. A portion of the data that is associated with a given area in the image is partitioned into a plurality of sub-areas. The plurality of sub-areas are assigned to a plurality of processor elements of a parallel computing system, respectively, such that the data associated with each one of the plurality of sub-areas is processed independent from the data associated with each other of the plurality of sub-areas, wherein results of the processing by the processor elements represents the LoS map. The parallel computing system may be a multicore processor.

摘要翻译： 公开了用于并行计算并行计算系统中的视线（LoS）映射（例如，视图）的技术。 例如，用于计算LoS映射的方法包括以下步骤。 获得表示至少一个图像的数据。 识别至少一个图像中的观察点。 与图像中的给定区域相关联的数据的一部分被划分为多个子区域。 多个子区域分别被分配给并行计算系统的多个处理器元件，使得与多个子区域中的每一个子区域相关联的数据被独立于与多个子区段中的彼此相关联的数据进行处理 的子区域，其中由处理器元件处理的结果表示LoS映射。 并行计算系统可以是多核处理器。

公开(公告)号：US20110206122A1

公开(公告)日：2011-08-25

申请号：US12712717

申请日：2010-02-25

申请人： Ligang Lu ,  Peter Westerink

发明人： Ligang Lu ,  Peter Westerink

IPC分类号： H04N7/32

CPC分类号： H04N19/137 ,  H04N19/107 ,  H04N19/14 ,  H04N19/172

摘要： Methods and apparatus are provided for encoding video, such as surveillance video. A video frame is encoded by evaluating a level of activity in video frame relative to one or more neighboring frames; encoding the video frame using an inter-coding technique if the evaluation satisfies one or more predefined inter-coding criteria, wherein said inter-coding technique is applied to said video frame without a Group of Picture structure having a maximum number of consecutive inter-coded frames; and encoding the video frame using an intra-coding technique if the evaluation satisfies one or more predefined intra-coding criteria. The evaluating step may comprise, for example, determining whether differences between the video frame and the one or more neighboring frames exceed a predefined threshold.

摘要翻译： 提供了编码视频的方法和装置，如监视视频。 通过评估视频帧中相对于一个或多个相邻帧的活动水平来编码视频帧; 如果评估满足一个或多个预定义的帧间编码标准，则使用帧间编码技术对视频帧进行编码，其中所述帧间编码技术被应用于所述视频帧，而不具有最大数量的连续帧间编码的图像组 框架 以及如果所述评估满足一个或多个预定义的内部编码标准，则使用帧内编码技术来编码所述视频帧。 评估步骤可以包括例如确定视频帧与一个或多个相邻帧之间的差异是否超过预定阈值。

公开(公告)号：US07844002B2

公开(公告)日：2010-11-30

申请号：US12131268

申请日：2008-06-02

申请人： Ligang Lu ,  Vadim Sheinin

发明人： Ligang Lu ,  Vadim Sheinin

IPC分类号： H04N7/12 ,  G06F15/16

CPC分类号： H04N19/194 ,  H04N19/102 ,  H04N19/15 ,  H04N19/61

摘要： A real-time MPEG video coding system with information look-ahead for constant bit rate (CBR) applications, such as, for example, Video-on-Demand (VoD) over ADSL. This scheme employs two MPEG encoders. The second encoder has a buffer to delay the input by an amount of time relative to the first encoder to create a look-ahead window. In encoding, the first encoder collects the information of statistics and rate-quality characteristics. An on-line information processor then uses the collected information to derive the best coding strategy for the second encoder to encode the incoming frames in the look-ahead window. The second encoder uses the encoding parameters from the processor as the coding guide to execute the coding strategy and generate the final bitstream.

摘要翻译： 一种实时MPEG视频编码系统，其具有针对恒定比特率（CBR）应用的信息，例如通过ADSL的视频点播（VoD）。 该方案采用两个MPEG编码器。 第二编码器具有缓冲器，用于将输入延迟相对于第一编码器的时间量以创建预览窗口。 在编码中，第一编码器收集统计信息和速率质量特征。 然后，在线信息处理器使用所收集的信息来导出用于第二编码器的最佳编码策略，以对前进窗口中的输入帧进行编码。 第二编码器使用来自处理器的编码参数作为编码指南来执行编码策略并生成最终比特流。