Directional Transforms for Video and Image Coding
    41.
    发明申请
    Directional Transforms for Video and Image Coding 审中-公开
    视频和图像编码的定向变换

    公开(公告)号:US20110090952A1

    公开(公告)日:2011-04-21

    申请号:US12603100

    申请日:2009-10-21

    IPC分类号: H04N7/50

    摘要: A bitstream includes a sequence of frames. Each frame is partitioned into encoded blocks. For each block, a set of paths is determined at a transform angle determined from a transform index in the bitstream. Transform coefficients are obtained from bitstream. The transform coefficients include one DC coefficient for each path. An inverse transform is applied to the transform coefficients to produce a decoded video.

    摘要翻译: 比特流包括一系列帧。 每帧被划分成编码块。 对于每个块,以从比特流中的变换索引确定的变换角确定一组路径。 从比特流获得变换系数。 变换系数包括每个路径的一个DC系数。 将逆变换应用于变换系数以产生解码视频。

    Resource-constrained encoding of multiple videos
    42.
    发明授权
    Resource-constrained encoding of multiple videos 失效
    资源受限的多个视频编码

    公开(公告)号:US07324592B2

    公开(公告)日:2008-01-29

    申请号:US10639951

    申请日:2003-08-13

    IPC分类号: H04B1/66 H04N7/12 H04N11/02

    摘要: A method acquires a plurality of input videos. The frames of each input video are acquired at a fixed sampling rate. Joint analysis is applied concurrently and in parallel to the input videos to determine a variable and non-uniform temporal sampling rate for each input video so that a combined distortion is minimized and a combined frame rate constraint is satisfied. Each input video is then sampled at the associated variable and non-uniform temporal sampling rate to produce output videos having variable temporal resolutions.

    摘要翻译: 方法获取多个输入视频。 以固定的采样率获取每个输入视频的帧。 联合分析同时并行地应用于输入视频,以确定每个输入视频的可变和非均匀时间采样率,使得组合失真被最小化并且组合的帧速率约束被满足。 然后以相关联的变量和非均匀时间采样率对每个输入视频进行采样,以产生具有可变时间分辨率的输出视频。

    Extraction of high-level features from low-level features of multimedia content
    45.
    发明授权
    Extraction of high-level features from low-level features of multimedia content 有权
    从多媒体内容的低级功能中提取高级功能

    公开(公告)号:US06763069B1

    公开(公告)日:2004-07-13

    申请号:US09610763

    申请日:2000-07-06

    IPC分类号: H04N712

    CPC分类号: G06K9/00711

    摘要: A method extracts high-level features from a video including a sequence of frames. Low-level features are extracted from each frame of the video. Each frame of the video is labeled according to the extracted low-level features to generate sequences of labels. Each sequence of labels is associated with one of the extracted low-level feature. The sequences of labels are analyzed using learning machine learning techniques to extract high-level features of the video.

    摘要翻译: 一种方法从包括帧序列的视频中提取高级特征。 从视频的每个帧中提取低级功能。 视频的每个帧根据提取的低级特征进行标记,以生成标签序列。 标签的每个序列与提取的低级特征之一相关联。 使用学习机器学习技术来分析标签序列以提取视频的高级特征。

    Estimating rate-distortion characteristics of binary shape data
    47.
    发明授权
    Estimating rate-distortion characteristics of binary shape data 失效
    估计二进制形状数据的速率 - 失真特性

    公开(公告)号:US06542545B1

    公开(公告)日:2003-04-01

    申请号:US09410552

    申请日:1999-10-01

    IPC分类号: H04N1102

    摘要: A method estimates rate and distortion characteristics of a video object. First and second object shape features are respectively extracted at a first and second resolution of the video object. First and second rate distortion characteristics of the video object are respectively determined from the extracted first and second object shape features according to first and second modeling parameters. The extracted object shape features can be discrete, such as states of binary shape patterns of the video object, or the object shape features can be continuous such as a set of statistical moments representing a probability density function of the video object.

    摘要翻译: 方法估计视频对象的速率和失真特性。 分别以视频对象的第一和第二分辨率提取第一和第二对象形状特征。 根据第一和第二建模参数,从所提取的第一和第二对象形状特征分别确定视频对象的第一和第二速率失真特性。 所提取的对象形状特征可以是离散的,诸如视频对象的二进制形状图案的状态,或者对象形状特征可以是连续的,例如表示视频对象的概率密度函数的一组统计矩。

    Method for ordering image spaces to search for object surfaces
    48.
    发明授权
    Method for ordering image spaces to search for object surfaces 失效
    用于排序图像空间以搜索对象表面的方法

    公开(公告)号:US06400846B1

    公开(公告)日:2002-06-04

    申请号:US09326750

    申请日:1999-06-04

    IPC分类号: G06K936

    摘要: A method determines a surface of an object in a sequence of images. The method begins by estimating a boundary of the object in each image of the sequence using motion information of adjacent images of the sequence. Then, portions of each image of the sequence are ordered to produce an ordered sequence of images. The ordered portions are exterior to the estimated object boundary. Edges in each ordered image are filtered using the motion information, and each ordered image of the sequence is searched to locate the filtered edges to form a new boundary outside the estimated boundary. The filtering and searching are repeated, while projecting the new object boundaries over the sequence of images, until the new object boundaries converges to a surface of the object.

    摘要翻译: 方法确定图像序列中的对象的表面。 该方法通过使用序列的相邻图像的运动信息来估计序列的每个图像中的对象的边界来开始。 然后,序列的每个图像的部分被排序以产生有序的图像序列。 有序部分在估计对象边界的外部。 使用运动信息对每个有序图像中的边缘进行滤波,并且搜索序列的每个有序图像以定位经滤波的边缘以在估计边界外部形成新的边界。 重复过滤和搜索,同时在图像序列上投影新对象边界,直到新对象边界收敛到对象的表面。

    Method for Coding Pictures Using Hierarchical Transform Units
    49.
    发明申请
    Method for Coding Pictures Using Hierarchical Transform Units 有权
    使用分层变换单元编码图像的方法

    公开(公告)号:US20120281928A1

    公开(公告)日:2012-11-08

    申请号:US13169959

    申请日:2011-06-27

    IPC分类号: G06K9/36

    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。

    Method and system for randomly accessing multiview videos with known prediction dependency
    50.
    发明授权
    Method and system for randomly accessing multiview videos with known prediction dependency 有权
    随机访问具有已知预测依赖关系的多视点视频的方法和系统

    公开(公告)号:US07903737B2

    公开(公告)日:2011-03-08

    申请号:US11385620

    申请日:2006-03-21

    摘要: A method randomly accesses multiview videos. Multiview videos are acquired of a scene with corresponding cameras arranged at poses, such that there is view overlap between any pair of cameras. V-frames are generated from the multiview videos. The V-frames are encoded using only spatial prediction. Then, the V-frames are inserted periodically in an encoded bit stream to provide random temporal access to the multiview videos. Additional view dependency information enables the decoding of a reduced number of frames prior to accessing randomly a target frame for a specified view and time, and decoding the target frame.

    摘要翻译: 一种随机访问多视点视频的方法。 多视点视频被采集到具有以姿势布置的相应摄像机的场景,使得在任何一对摄像机之间存在视图重叠。 V帧是从多视角视频生成的。 V帧仅使用空间预测编码。 然后,将V帧周期性地插入到编码比特流中,以便为多视点视频提供随机的时间访问。 附加的视图依赖性信息使得能够在对指定的视图和时间的随机访问目标帧之前对减少数量的帧进行解码,以及对目标帧进行解码。