公开(公告)号：US08494290B2

公开(公告)日：2013-07-23

申请号：US13169959

申请日：2011-06-27

申请人： Robert A. Cohen ,  Anthony Vetro ,  Huifang Sun

发明人： Robert A. Cohen ,  Anthony Vetro ,  Huifang Sun

IPC分类号： G06K9/36

CPC分类号： G06T9/40 ,  H04N19/119 ,  H04N19/122 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

摘要： A bitstream includes coded pictures, and split-flags for generating a transform tree. The bit stream is a partitioning of coding units (CUs) into Prediction Units (PUs). The transform tree is generated according to the split-flags. Nodes in the transform tree represent transform units (TU) associated with the CUs. The generation splits each TU only if the corresponding split-flag is set. For each PU that includes multiple TUs, the multiple TUs are merged into a larger TU, and the transform tree is modified according to the splitting and merging. Then, data contained in each PU can be decoded using the TUs associated with the PU according to the transform tree.

摘要翻译： 比特流包括编码图像，以及用于生成变换树的分割标志。 比特流是将编码单元（CU）划分成预测单元（PU）。 转换树根据分裂标志生成。 变换树中的节点表示与CU相关联的变换单元（TU）。 仅当相应的分割标志被设置时，该代码才能分割每个TU。 对于包含多个TU的每个PU，将多个TU合并成一个较大的TU，根据分割和合并修改变换树。 然后，可以使用根据变换树与PU相关联的TU来解码包含在每个PU中的数据。

公开(公告)号：US07394855B2

公开(公告)日：2008-07-01

申请号：US10717826

申请日：2003-11-20

申请人： Hao-Song Kong ,  Wei-Ying Kung ,  Anthony Vetro ,  Huifang Sun

发明人： Hao-Song Kong ,  Wei-Ying Kung ,  Anthony Vetro ,  Huifang Sun

IPC分类号： G06K9/40

CPC分类号： H04N19/895 ,  H04N19/159

摘要： A method conceals errors in an infra-frame of compressed video. The intra-frame is decoded to multiple macroblocks. Each macroblock including pixels arranged in a rectangular array. A lost macroblock is identified during the decoding. Pixels along an outer boundary of the lost macroblock are concealed from nearest candidate pixels along outer boundaries of macroblocks immediately adjacent to the lost macroblock. All other pixels in the lost macroblock are concealed from nearest candidate pixels selected from previously concealed pixels in the lost macroblock.

摘要翻译： 一种方法隐藏了压缩视频的帧内错误。 帧内解码为多个宏块。 每个宏块包括以矩形阵列排列的像素。 在解码期间识别丢失的宏块。 沿着与丢失的宏块紧邻的宏块的外边界沿着离开的宏块的外边界的像素被隐藏起来。 丢失的宏块中的所有其他像素从丢失宏块中的先前隐藏的像素中选择的最近的候选像素中隐藏。

公开(公告)号：US07142601B2

公开(公告)日：2006-11-28

申请号：US10413250

申请日：2003-04-14

申请人： Hao-Song Kong ,  Anthony Vetro ,  Huifang Sun

发明人： Hao-Song Kong ,  Anthony Vetro ,  Huifang Sun

IPC分类号： H04B1/66 ,  H04N7/12

CPC分类号： H04N19/59 ,  H04N19/126 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/40 ,  H04N19/60

摘要： A method and system transcodes an input video to a lower spatial resolution. The input video is first decoded into pictures. Each picture includes a set of macroblocks. Each picture sub-sampled to a downscaled picture having a lower spatial resolution. A quantization scale is selected for each macroblock in the downscaled picture. A set of motion vectors is generated for each macroblock in the downscaled picture. A multiplier value based on the quantization scale is determined for each macroblock in the downscaled picture. One of a plurality of encoding modes is selected for each macroblock in the downscaled picture according to the quantization scale, the motion vectors, and the multiplier value. Then, each macroblock in each downscaled picture is encoded according to the quantization scale, the selected encoding mode, and the set of motion vectors to produce an output video having a lower spatial resolution that the input video.

摘要翻译： 方法和系统将输入视频转码为较低的空间分辨率。 输入视频首先被解码为图片。 每个图片包括一组宏块。 每个图像被子采样到具有较低空间分辨率的缩小图像。 对于缩小图像中的每个宏块选择量化比例。 对于缩小图像中的每个宏块生成一组运动矢量。 对于缩小图像中的每个宏块确定基于量化比例的乘数值。 根据量化尺度，运动矢量和乘数值，对缩小图像中的每个宏块选择多个编码模式之一。 然后，根据量化尺度，所选择的编码模式和运动矢量集合对每个缩小图像中的每个宏块进行编码，以产生输入视频具有较低空间分辨率的输出视频。

公开(公告)号：US20050175109A1

公开(公告)日：2005-08-11

申请号：US10776571

申请日：2004-02-11

申请人： Anthony Vetro ,  Minghui Xia ,  Bede Liu ,  Huifang Sun

发明人： Anthony Vetro ,  Minghui Xia ,  Bede Liu ,  Huifang Sun

IPC分类号： H03M7/30 ,  H04N7/12 ,  H04N19/89 ,  H04N19/895

CPC分类号： H04N19/68 ,  H04N19/107 ,  H04N19/126 ,  H04N19/147 ,  H04N19/172 ,  H04N19/19 ,  H04N19/40 ,  H04N19/61 ,  H04N19/89 ,  H04N19/895

摘要： A method transcodes an input video to an output video, which can have a lower bit rate than the input video. Sets of rate values and corresponding sets of distortion values are determined for each components of the output video. There is one set of rate values and one corresponding set of distortion values for each component in the output video. The components include a requantization of the input video, inserted resynchronization markers, and inserted intra-blocks. Then, bits are allocated to each of the components in the output video according to the associated set of rate values and the associated corresponding set of distortion values.

摘要翻译： 一种方法将输入视频转码为输出视频，其可以具有比输入视频更低的比特率。 为输出视频的每个组件确定速率值和相应的失真值集合。 输出视频中的每个组件有一组速率值和一组对应的失真值。 这些组件包括输入视频的重新排序，插入的重新同步标记和插入的块内块。 然后，根据相关联的一组速率值和相应的对应的失真值组，将比特分配给输出视频中的每个分量。

公开(公告)号：US20050111557A1

公开(公告)日：2005-05-26

申请号：US10717826

申请日：2003-11-20

申请人： Hao-Song Kong ,  Wei-Ying Kung ,  Anthony Vetro ,  Huifang Sun

发明人： Hao-Song Kong ,  Wei-Ying Kung ,  Anthony Vetro ,  Huifang Sun

IPC分类号： H04N7/12 ,  H04N19/895

CPC分类号： H04N19/895 ,  H04N19/159

摘要： A method conceals errors in an intra-fame of compressed video. The intra-frame is decoded to multiple macroblocks. Each macroblock including pixels arranged in a rectangular array. A lost macroblock is identified during the decoding. Pixels along an outer boundary of the lost macroblock are concealed from nearest candidate pixels along outer boundaries of macroblocks immediately adjacent to the lost macroblock. All other pixels in the lost macroblock are concealed from nearest candidate pixels selected from previously concealed pixels in the lost macroblock.

摘要翻译： 一种方法隐藏压缩视频内部的错误。 帧内解码为多个宏块。 每个宏块包括以矩形阵列排列的像素。 在解码期间识别丢失的宏块。 沿着与丢失的宏块紧邻的宏块的外边界沿着离开的宏块的外边界的像素被隐藏起来。 丢失的宏块中的所有其他像素从丢失宏块中的先前隐藏的像素中选择的最近的候选像素中隐藏。

公开(公告)号：US20050100235A1

公开(公告)日：2005-05-12

申请号：US10703809

申请日：2003-11-07

申请人： Hao-Song Kong ,  Anthony Vetro ,  Huifang Sun

发明人： Hao-Song Kong ,  Anthony Vetro ,  Huifang Sun

IPC分类号： G06T5/20 ,  G06K9/00 ,  G06K9/36 ,  G06K9/40 ,  G06T5/00 ,  H04N1/41 ,  H04N5/21 ,  H04N7/24 ,  H04N19/00

CPC分类号： H04N19/176 ,  G06T7/11 ,  G06T7/143 ,  G06T2207/20012 ,  G06T2207/20021 ,  H04N19/117 ,  H04N19/14 ,  H04N19/61 ,  H04N19/86

摘要： A method classifies pixels in an image. The image can be a decompressed image that was compressed using a block-based compression process. A filter is applied to each pixel in the image to determine a mean intensity value of the pixel. The mean is used to determine a mean-square intensity for each pixel, which in turn is used to determine a variance of the intensity for each pixel. The mean-square represents an average power of a DC component in the image, and the variance represents an average power of AC frequency components in the image. The pixels are then classified according to the variance as being either smooth, edge, or texture pixels. Blocks in the image can then be classified according to the classified pixels, and blocking artifacts and ringing artifacts in the blocks can then be filtered according to the block classification.

摘要翻译： 一种方法对图像中的像素进行分类。 图像可以是使用基于块的压缩过程压缩的解压缩图像。 将滤波器应用于图像中的每个像素以确定像素的平均强度值。 该平均值用于确定每个像素的均方强度，其依次用于确定每个像素的强度的方差。 均方根表示图像中的直流分量的平均功率，方差表示图像中的交流频率分量的平均功率。 然后将像素根据方差分类为平滑，边缘或纹理像素。 然后可以根据分类的像素对图像中的块进行分类，然后可以根据块分类来过滤块中的块伪影和振铃伪像。

公开(公告)号：US20050013249A1

公开(公告)日：2005-01-20

申请号：US10619358

申请日：2003-07-14

申请人： Hao-Song Kong ,  Huai-Rong Shao ,  Anthony Vetro ,  Huifang Sun

发明人： Hao-Song Kong ,  Huai-Rong Shao ,  Anthony Vetro ,  Huifang Sun

IPC分类号： H04L29/06 ,  H04L29/14 ,  H04L12/28

CPC分类号： H04L65/4084 ,  H04L29/06027 ,  H04L65/602 ,  H04L65/80 ,  H04L69/40

摘要： A method transmits a video over a network as a bit stream of packets. Real-time feedback information on conditions of the network is received while transmitting the packets. A probability of packet loss is based on the real-time feedback. Then, redundant packets are generated for selected packets of the bit stream if the probability of packet loss is greater than a predetermined threshold.

摘要翻译： 一种方法通过网络发送视频作为分组的比特流。 在发送数据包时接收到网络状况的实时反馈信息。 丢包的概率是基于实时反馈。 然后，如果分组丢失的概率大于预定阈值，则为比特流的所选分组生成冗余分组。

公开(公告)号：US06266443B1

公开(公告)日：2001-07-24

申请号：US09219062

申请日：1998-12-22

申请人： Anthony Vetro ,  Huifang Sun ,  I-Jong Lin ,  Sun-Yuan Kung

发明人： Anthony Vetro ,  Huifang Sun ,  I-Jong Lin ,  Sun-Yuan Kung

IPC分类号： G06K948

CPC分类号： G06T7/143 ,  G06T7/12 ,  G06T2207/10016 ,  G06T2207/20081

摘要： A method detects a boundary in a sequence of two-dimensional images where each image has multiple intensity value points. Filtering and motion analysis is applied on each image to produce motion enhanced images. Initial search parameters are determined from a dynamic snake model applied to the motion enhanced images. Each motion enhanced image is searched for a potential boundary using the search parameters. The potential boundary is projected into the motion enhanced image of a previous, current, and next image, and the search parameters of the previous, current, and next images are updated. The searching, projecting, and updating repeat until a predetermined level of convergence is reached.

摘要翻译： 一种方法检测二维图像序列中的边界，其中每个图像具有多个强度值点。 对每个图像应用滤波和运动分析以产生运动增强图像。 从应用于运动增强图像的动态蛇模型确定初始搜索参数。 使用搜索参数搜索每个运动增强图像的潜在边界。 潜在边界被投影到先前，当前和下一个图像的运动增强图像中，并且更新先前，当前和下一图像的搜索参数。 搜索，投影和更新重复，直到达到预定的收敛水平。

公开(公告)号：US20120230396A1

公开(公告)日：2012-09-13

申请号：US13250972

申请日：2011-09-30

申请人： Robert A. Cohen ,  Shantanu Rane ,  Anthony Vetro ,  Huifang Sun

发明人： Robert A. Cohen ,  Shantanu Rane ,  Anthony Vetro ,  Huifang Sun

IPC分类号： H04N7/26

CPC分类号： H04N19/467 ,  H04N19/18 ,  H04N19/196 ,  H04N19/463 ,  H04N19/48 ,  H04N19/61 ,  H04N19/70

摘要： A method decodes a picture in a form of a bit-stream. The picture is encoded and represented by vectors of coefficients. Each coefficient is in a quantized form. A specific coefficient is selected in each vector based on a scan order of the vector. Then, a set of modes is inferred based on characteristics of the specific coefficient. Subsequently, the bit-stream is decoded according to the set of modes.

摘要翻译： 一种方法以比特流的形式对图像进行解码。 图像被编码并由系数矢量表示。 每个系数都是量化的形式。 基于向量的扫描顺序在每个向量中选择特定系数。 然后，基于特定系数的特征推断出一组模式。 随后，根据模式集合解码比特流。

公开(公告)号：US20110090954A1

公开(公告)日：2011-04-21

申请号：US12603177

申请日：2009-10-21

申请人： Robert A. Cohen ,  Sven Klomp ,  Huifang Sun ,  Anthony Vetro

发明人： Robert A. Cohen ,  Sven Klomp ,  Huifang Sun ,  Anthony Vetro

IPC分类号： H04N7/24

CPC分类号： H04N19/463 ,  H04N19/122 ,  H04N19/13 ,  H04N19/147 ,  H04N19/196 ,  H04N19/197

摘要： An encoded video in the form of a bitstream includes a sequence of frames, and each frame is partitioned into encoded blocks. A context for decoding is selected for each encoded block. The bitstream is entropy decoded based on the context to obtain a transform indicator difference. The transform index, which indicates a transform type and a transform direction, is based on the transform indicator difference and a predicted transform indicator. Transform coefficients are obtained from the bitstream, and inverse transformed according to the transform index to produce a decoded video.

摘要翻译： 以比特流形式的编码视频包括一系列帧，每帧被划分成编码块。 为每个编码块选择用于解码的上下文。 基于上下文对比特流进行熵解码以获得变换指示符差异。 指示变换类型和变换方向的变换索引基于变换指标差和预测变换指标。 从比特流获得变换系数，并根据变换索引进行逆变换以产生解码视频。