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    Hierarchical Bi-Directional P Frames
    21.
    发明申请
    Hierarchical Bi-Directional P Frames 审中-公开
    分层双向P帧

    公开(公告)号：US20100008419A1

    公开(公告)日：2010-01-14

    申请号：US12339735

    申请日：2008-12-19

    申请人： Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Xiaosong ZHOU ,  Gianluca FILIPPINI ,  Ionut HRISTODORESCU

    发明人： Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Xiaosong ZHOU ,  Gianluca FILIPPINI ,  Ionut HRISTODORESCU

    IPC分类号： H04N7/32

    CPC分类号： H04N19/105 ,  H04N19/31 ,  H04N19/577

    摘要： Embodiments of the present invention provide systems, methods and apparatuses for generating forward, backward or bi-directional P frames. Prior to encoding a sequence of video frames, P frames within the video sequence can be reordered to include causal and/or non-causal references to one or more reference frames. This allows any block partition of a bi-directional P frame to include a single reference to a reference frame that is temporally displayed either before or after the bi-directional P frame. Compression and visual quality can therefore be improved. Hierarchical frame structures can be constructed using bi-directional P frames to better accommodate low complexity decoding profiles. Multilayered encoded video bitstreams can be generated based on the hierarchical frame structures and can include a first layer of anchor frames and one or more second layers that include bi-directional P frames that reference the anchor frames and/or any frame in any lower level layer.

    摘要翻译： 本发明的实施例提供用于产生前向，后向或双向P帧的系统，方法和装置。 在对一系列视频帧进行编码之前，视频序列内的P帧可以被重新排序，以包括对一个或多个参考帧的因果和/或非因果引用。 这允许双向P帧的任何块分区包括在双向P帧之前或之后临时显示的参考帧的单个引用。 因此可以提高压缩和视觉质量。 可以使用双向P帧来构建分层帧结构，以更好地适应低复杂度的解码简档。 可以基于分级帧结构来生成多层编码视频比特流，并且可以包括第一层锚帧和一个或多个第二层，其包括引用锚帧和/或任何较低级别层中的任何帧的双向P帧 。

    Complexity-aware encoding
    23.
    发明授权
    Complexity-aware encoding 有权
    复杂性感知编码

    公开(公告)号：US08830092B2

    公开(公告)日：2014-09-09

    申请号：US13156610

    申请日：2011-06-09

    申请人： Jim Normile ,  Thomas Pun ,  Xiaojin Shi ,  Xin Tong ,  Hsi-Jung Wu

    发明人： Jim Normile ,  Thomas Pun ,  Xiaojin Shi ,  Xin Tong ,  Hsi-Jung Wu

    IPC分类号： H03M7/00

    CPC分类号： H04N19/154 ,  H04N19/156 ,  H04N19/164

    摘要： Techniques for encoding data based at least in part upon an awareness of the decoding complexity of the encoded data and the ability of a target decoder to decode the encoded data are disclosed. In some embodiments, a set of data is encoded based at least in part upon a state of a target decoder to which the encoded set of data is to be provided. In some embodiments, a set of data is encoded based at least in part upon the states of multiple decoders to which the encoded set of data is to be provided.

    摘要翻译： 公开了至少部分地基于编码数据的解码复杂度的意识和目标解码器解码编码数据的能力对数据进行编码的技术。 在一些实施例中，至少部分地基于要提供编码数据集合的目标解码器的状态对数据集进行编码。 在一些实施例中，一组数据至少部分地基于要提供编码数据集的多个解码器的状态进行编码。

    ACCELEROMETER / GYRO-FACILITATED VIDEO STABILIZATION
    24.
    发明申请
    ACCELEROMETER / GYRO-FACILITATED VIDEO STABILIZATION 有权
    加速度计/ GYRO-FACIA-VIDEO STABILIZATION

    公开(公告)号：US20110234825A1

    公开(公告)日：2011-09-29

    申请号：US12755620

    申请日：2010-04-07

    申请人： Yuxin LIU ,  Xiaojin SHI ,  James Oliver NORMILE ,  Hsi-Jung WU

    发明人： Yuxin LIU ,  Xiaojin SHI ,  James Oliver NORMILE ,  Hsi-Jung WU

    IPC分类号： H04N5/228

    CPC分类号： H04N5/23248 ,  H04N5/23254 ,  H04N5/23258 ,  H04N5/23267

    摘要： Embodiments of the present invention provide a control system for video processes that selectively control the operation of motion stabilization processes. According to the present invention, motion sensor data indicative of motion of a mobile device may be received and processed. A determination may be made by comparing processed motion sensor data to a threshold. Based on the determination, motion stabilization may be suspended on select portions of a captured video sequence.

    摘要翻译： 本发明的实施例提供了一种用于视频过程的控制系统，其选择性地控制运动稳定过程的操作。 根据本发明，可以接收并处理表示移动设备的运动的运动传感器数据。 可以通过将经处理的运动传感器数据与阈值进行比较来确定。 基于该确定，可以在拍摄的视频序列的选择部分上暂停运动稳定。

    Joint Bandwidth Detection Algorithm For Real-Time Communication
    25.
    发明申请
    Joint Bandwidth Detection Algorithm For Real-Time Communication 有权
    用于实时通信的联合带宽检测算法

    公开(公告)号：US20110149087A1

    公开(公告)日：2011-06-23

    申请号：US12646065

    申请日：2009-12-23

    申请人： Hyeonkuk JEONG ,  Xiaosong ZHOU ,  Joe ABUAN ,  Xiaojin SHI ,  Hsi-Jung WU ,  James Oliver NORMILE

    发明人： Hyeonkuk JEONG ,  Xiaosong ZHOU ,  Joe ABUAN ,  Xiaojin SHI ,  Hsi-Jung WU ,  James Oliver NORMILE

    IPC分类号： H04N7/26 ,  H04N5/225

    CPC分类号： H04N7/148 ,  H04N19/115 ,  H04N19/166 ,  H04N19/192 ,  H04N19/196 ,  H04N19/197 ,  H04N19/46

    摘要： A video coding system and method for increasing a transmitted output bit rate of a video encoding system by altering the content of the bit stream. A video encoder may receive a coding mode signal from a computer application for coding source video data, the coding mode signal indicating a target bit rate having a risk factor related to transmission error associated to the target bit rate. The coded bitstream may be modified based on the risk factor indicated in the coding mode signal. A modified coded bitstream may be outputted at the target bit rate and at a reduced coding efficiency, and the channel may be tested for transmission errors. Based on the test results, a revised coding mode signal indicating the same target bit rate, but a revised risk factor may be provided. The coded bitstream may be revised by removing the modifications previously made to the coded bitstream and a revised coded bitstream having greater coding efficiency may be output at the target bit rate.

    摘要翻译： 一种用于通过改变比特流的内容来增加视频编码系统的发送的输出比特率的视频编码系统和方法。 视频编码器可以接收来自用于编码源视频数据的计算机应用的编码模式信号，编码模式信号指示具有与目标比特率相关联的传输错误的风险因子的目标比特率。 可以基于编码模式信号中指示的危险因素来修改编码比特流。 可以以目标比特率和降低的编码效率输出经修改的编码比特流，并且可以测试该信道的传输错误。 基于测试结果，可以提供指示相同目标比特率的修订的编码模式信号，但是可以提供经修订的风险因子。 可以通过去除先前对编码比特流进行的修改来修改编码比特流，并且可以以目标比特率输出具有较高编码效率的修订编码比特流。

    Facial Pose Improvement with Perspective Distortion Correction
    26.
    发明申请
    Facial Pose Improvement with Perspective Distortion Correction 有权
    透视畸变修正的面部姿态改善

    公开(公告)号：US20110090303A1

    公开(公告)日：2011-04-21

    申请号：US12581043

    申请日：2009-10-16

    申请人： Hsi-Jung Wu ,  Chris Yoochang Chung ,  Xiaojin Shi ,  James Normile

    发明人： Hsi-Jung Wu ,  Chris Yoochang Chung ,  Xiaojin Shi ,  James Normile

    IPC分类号： H04N7/15 ,  H04N5/217

    CPC分类号： G06K9/00228 ,  G06T3/00 ,  G06T5/006 ,  G06T2207/20104 ,  G06T2207/30201 ,  H04N5/217 ,  H04N5/23219 ,  H04N5/23258 ,  H04N5/23267

    摘要： Methods, systems, and apparatus are presented for reducing distortion in an image, such as a video image. A video image can be captured by an image capture device, e.g. during a video conferencing session. Distortion correction processing, such as the application of one or more warping techniques, can be applied to the captured image to produce a distortion corrected image, which can be transmitted to one or more participants. The warping techniques can be performed in accordance with one or more warp parameters specifying a transformation of the captured image. Further, the warp parameters can be generated in accordance with an orientation of the image capture device, which can be determined based on sensor data or can be a fixed value. Additionally or alternatively, the warp parameters can be determined in accordance with a reference image or model to which the captured image should be warped.

    摘要翻译： 呈现了用于减少诸如视频图像的图像中的失真的方法，系统和装置。 视频图像可以由图像捕获设备捕获，例如， 在视频会议期间。 畸变校正处理，例如应用一个或多个翘曲技术，可以应用于所捕获的图像，以产生可以发送到一个或多个参与者的失真校正图像。 翘曲技术可以根据指定捕获图像的变换的一个或多个翘曲参数来执行。 此外，可以根据可以基于传感器数据确定的图像捕获装置的取向来生成翘曲参数，或者可以是固定值。 附加地或替代地，可以根据捕获的图像应该翘曲的参考图像或模型来确定翘曲参数。

    IMAGE ACQUISITION AND ENCODING SYSTEM
    27.
    发明申请
    IMAGE ACQUISITION AND ENCODING SYSTEM 审中-公开
    图像采集和编码系统

    公开(公告)号：US20100309987A1

    公开(公告)日：2010-12-09

    申请号：US12533927

    申请日：2009-07-31

    申请人： Davide CONCION ,  Xiaosong ZHOU ,  Guy COTE ,  Cecile FORET ,  Haitao (Harry) GUO ,  Ionut HRISTODORESCU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Hsi-Jung WU

    发明人： Davide CONCION ,  Xiaosong ZHOU ,  Guy COTE ,  Cecile FORET ,  Haitao (Harry) GUO ,  Ionut HRISTODORESCU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Hsi-Jung WU

    IPC分类号： H04N7/26 ,  H04N7/24

    CPC分类号： H04N5/772 ,  H04N5/765 ,  H04N5/781 ,  H04N5/85 ,  H04N9/7921 ,  H04N9/8042 ,  H04N9/8205 ,  H04N19/107 ,  H04N19/124 ,  H04N19/139 ,  H04N19/14 ,  H04N19/40 ,  H04N19/46 ,  H04N19/85

    摘要： A method and system are provided to encode a video sequence into a compressed bitstream. An encoder receives a video sequence from an image-capture device, together with metadata associated with the video sequence, and codes the video sequence into a first compressed bitstream using the metadata to select or revise a coding parameter associated with a coding operation. Optionally, the video sequence may be conditioned for coding by a preprocessor, which also may use the metadata to select or revise a preprocessing parameter associated with a preprocessing operation. The encoder may itself generate metadata associated with the first compressed bitstream, which may be used together with any metadata received by the encoder, to transcode the first compressed bitstream into a second compressed bitstream. The compressed bitstreams may be decoded by a decoder to generate recovered video data, and the recovered video data may be conditioned for viewing by a postprocessor, which may use the metadata to select or revise a postprocessing parameter associated with a postprocessing operation.

    摘要翻译： 提供了将视频序列编码为压缩比特流的方法和系统。 编码器从图像捕获装置接收视频序列以及与视频序列相关联的元数据，并且使用元数据将视频序列编码为第一压缩比特流，以选择或修改与编码操作相关联的编码参数。 可选地，视频序列可以由预处理器进行调节，预处理器也可以使用元数据来选择或修改与预处理操作相关联的预处理参数。 编码器本身可以产生与可与编码器接收的任何元数据一起使用的第一压缩比特流相关联的元数据，以将第一压缩比特流转码为第二压缩比特流。 压缩比特流可以由解码器解码以产生恢复的视频数据，并且恢复的视频数据可以被调整为由后处理器进行查看，后处理器可以使用元数据来选择或修改与后处理操作相关联的后处理参数。

    DYNAMIC DITHERING FOR VIDEO COMPRESSION
    29.
    发明申请
    DYNAMIC DITHERING FOR VIDEO COMPRESSION 有权
    动态压缩视频压缩

    公开(公告)号：US20100246689A1

    公开(公告)日：2010-09-30

    申请号：US12463859

    申请日：2009-05-11

    申请人： Gianluca FILIPPINI ,  Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Xiaosong ZHOU ,  Ionut HRISTODORESCU

    发明人： Gianluca FILIPPINI ,  Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Xiaosong ZHOU ,  Ionut HRISTODORESCU

    IPC分类号： H04N7/26

    CPC分类号： H04N19/90 ,  H04N19/124 ,  H04N19/136 ,  H04N19/154 ,  H04N19/86

    摘要： A method and device for dithering video from a decoder. The method and device provide: selecting a segment of video frames from the video; computing a noise map for the segment of the video, the noise map computed from differences among pixels selected from spatially-distributed sampling patterns in the segment; determining contours of quantization artifacts within the video frame based on the noise map and a histogram of pixel values in the video frame; computing a gradient measurement of pixel values along the contours; identifying regions along the contours of quantization artifacts to apply dithering based on the noise map and the gradient measurement; determining a dithering strength based on the noise map and the gradient measurement; and applying dithering noise to the identified regions at the determined dithering strength.

    摘要翻译： 一种从解码器抖动视频的方法和装置。 该方法和设备提供：从视频中选择一段视频帧; 计算视频段的噪声映射，根据从片段中的空间分布采样模式中选择的像素之间的差异计算的噪声图; 基于噪声图和视频帧中的像素值的直方图确定视频帧内的量化伪像的轮廓; 计算沿着轮廓的像素值的梯度测量; 识别沿着量化伪影轮廓的区域，以基于噪声图和梯度测量应用抖动; 基于噪声图和梯度测量确定抖动强度; 并以确定的抖动强度对所识别的区域施加抖动噪声。

    VIDEO CODER PROVIDING IMPROVED VISUAL QUALITY DURING USE OF HETEROGENEOUS CODING MODES
    30.
    发明申请
    VIDEO CODER PROVIDING IMPROVED VISUAL QUALITY DURING USE OF HETEROGENEOUS CODING MODES 审中-公开
    视频编码器在使用异构编码模式时提供改进的视觉质量

    公开(公告)号：US20110038416A1

    公开(公告)日：2011-02-17

    申请号：US12541773

    申请日：2009-08-14

    申请人： Xiaosong ZHOU ,  Ionut HRISTODORESCU ,  Hsi-Jung WU ,  Xiaojin SHI

    发明人： Xiaosong ZHOU ,  Ionut HRISTODORESCU ,  Hsi-Jung WU ,  Xiaojin SHI

    IPC分类号： H04N11/04

    CPC分类号： H04N19/194 ,  H04N19/103 ,  H04N19/109 ,  H04N19/11 ,  H04N19/154 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182 ,  H04N19/61

    摘要： A video coding system reduces perceptible artifacts introduced to coded video due to selection of disparate coding modes among adjacent partitions of video. When coding modes are assigned to partitions of video that likely would introduce visually perceptible coding artifacts during decode, the partitions may be subject to a coding process in which a selected partition is coded according to coding modes that correspond to neighboring partitions, then decoded. The decoded data of the selected partition may be recoded according to a different coding mode. Coding artifacts that otherwise might be introduced by the different coding mode may be avoided by first coding the corresponding partition in a manner that is consistent with neighboring partitions, then decoding the coded partition and re-coding the decoded data according to the different mode. In an embodiment, a quantization parameter may be reduced between a first code and the recode. The coding technique may be applied to partitions of various scales—e.g., to pixel blocks or frames.

    摘要翻译： 视频编码系统由于在相邻的视频分区之间选择不同的编码模式，减少了引入编码视频的可察觉的伪像。 当编码模式被分配给可能在解码期间引入视觉上可感知的编码伪像的视频分区时，分区可以经受编码处理，其中根据与相邻分区对应的编码模式对所选择的分区进行编码，然后进行解码。 可以根据不同的编码模式重新编码所选分区的解码数据。 可以通过以与相邻分区一致的方式对相应的分区进行编码，然后根据不同的模式对编码的分区进行解码并重新编码解码的数据，可以避免不同的编码模式可能引入的编码人造物。 在一个实施例中，可以在第一代码和重新编码之间减少量化参数。 编码技术可以应用于各种尺度的分区，例如，应用于像素块或帧。