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    Accelerometer / gyro-facilitated video stabilization
    1.
    发明授权
    Accelerometer / gyro-facilitated video stabilization 有权
    加速度计/陀螺促进视频稳定

    公开(公告)号：US08558903B2

    公开(公告)日：2013-10-15

    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
    2.
    发明授权
    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：US08638851B2

    公开(公告)日：2014-01-28

    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： H04N7/12

    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更大编码效率的修改编码比特流。

    Hypothetical reference decoder
    3.
    发明授权
    Hypothetical reference decoder 有权
    假设参考解码器

    公开(公告)号：US08345774B2

    公开(公告)日：2013-01-01

    申请号：US12013094

    申请日：2008-01-11

    申请人： Hsi-Jung Wu ,  Barin Geoffry Haskell ,  Xiaojin Shi ,  James Oliver Normile

    发明人： Hsi-Jung Wu ,  Barin Geoffry Haskell ,  Xiaojin Shi ,  James Oliver Normile

    IPC分类号： H04N7/12

    CPC分类号： H04N19/44 ,  H04N19/149 ,  H04N19/152

    摘要： Disclosed is a system and method of controlling a video decoder, including a reviewing channel data representing coded video data generated by an encoder to identify parameters of a hypothetical reference decoder (HRD) used by the encoder during coding operations. A parameter representing an exit data rate requirement of a coded picture buffer (CPB) of the HRD is compared against exit rate performance of the video decoder. If the exit rate performance of the video coder matches the exit rate requirement of the HRD, the coded video data is decoded, otherwise, a certain decoding degradation scheme can be applied, including disabling decoder from decoding the coded video data.

    摘要翻译： 公开了一种控制视频解码器的系统和方法，包括：代表由编码器产生的编码视频数据的查看频道数据，以识别由编码器在编码操作期间使用的假设参考解码器（HRD）的参数。 将表示HRD的编码图像缓冲器（CPB）的退出数据速率要求的参数与视频解码器的退出速率性能进行比较。 如果视频编码器的退出速率性能与HRD的退出率要求相匹配，则编码的视频数据被解码，否则可以应用某种解码劣化方案，包括禁止解码器解码编码的视频数据。

    Dynamic dithering for video compression
    4.
    发明授权
    Dynamic dithering for video compression 有权
    用于视频压缩的动态抖动

    公开(公告)号：US08270498B2

    公开(公告)日：2012-09-18

    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： H04N7/12 ,  G06K9/40

    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。

    HYBRID SCALABLE CODING
    5.
    发明申请
    HYBRID SCALABLE CODING 审中-公开
    混合可扩展编码

    公开(公告)号：US20080181298A1

    公开(公告)日：2008-07-31

    申请号：US11627457

    申请日：2007-01-26

    申请人： Xiaojin Shi ,  Hsi-Jung Wu ,  James Oliver Normile

    发明人： Xiaojin Shi ,  Hsi-Jung Wu ,  James Oliver Normile

    IPC分类号： H04N7/32 ,  H04N7/26

    CPC分类号： H04N21/23439 ,  H04N19/156 ,  H04N19/30 ,  H04N19/40 ,  H04N19/46 ,  H04N21/234327 ,  H04N21/235 ,  H04N21/2662 ,  H04N21/435 ,  H04N21/84

    摘要： Systems, apparatuses and methods whereby coded bitstreams are delivered to downstream end-user devices having various performance capabilities. A head-end encoder/video store generates a primary coded bitstream and metadata for delivery to an intermediate re-encoding system. The re-encoding system recodes the primary coded bitstream to generate secondary coded bitstreams based on coding parameters in the metadata. Each secondary coded bitstream is matched to a conformance point of a downstream end-user device. Coding parameters for each conformance point can be derived from the head-end encoder encoding original source video to generate the secondary coded bitstreams and extracting information from the coding process/results. The metadata can then can be communicated as part of the primary coded bitstream (e.g., as SEI) or can be communicated separately. As a result, the complexity of the secondary coded bitstream is appropriately scaled to match the capabilities of the downstream end-user device to which it is delivered.

    摘要翻译： 其中编码比特流被传送到具有各种性能能力的下游终端用户设备的系统，设备和方法。 头端编码器/视频存储器产生主编码比特流和元数据以传送到中间重编码系统。 重编码系统基于元数据中的编码参数来重新编码主编码比特流以生成辅助编码比特流。 每个辅助编码比特流与下游终端用户设备的一致性点匹配。 可以从编码原始源视频的前端编码器导出用于每个一致性点的编码参数，以生成辅助编码比特流并从编码处理/结果中提取信息。 然后可以将元数据作为主编码比特流的一部分（例如，作为SEI）传送或者可以单独通信。 结果，二次编码比特流的复杂度被适当地缩放以匹配其被传递到的下游终端用户设备的能力。

    Refresh pixel group selection and coding adjustment
    8.
    发明授权
    Refresh pixel group selection and coding adjustment 有权
    刷新像素组选择和编码调整

    公开(公告)号：US08780986B2

    公开(公告)日：2014-07-15

    申请号：US12415478

    申请日：2009-03-31

    申请人： Hsi-Jung Wu ,  Xiaosong Zhou ,  Xiaojin Shi ,  Yuxin Liu

    发明人： Hsi-Jung Wu ,  Xiaosong Zhou ,  Xiaojin Shi ,  Yuxin Liu

    IPC分类号： H04N7/68 ,  H04N7/48 ,  H04N7/32 ,  H04N7/34 ,  H04N7/26 ,  H04N7/50 ,  H04N7/36

    CPC分类号： H04N7/26031 ,  H04N7/5086 ,  H04N19/107 ,  H04N19/137 ,  H04N19/176 ,  H04N19/61

    摘要： Apparatuses and methods for improving coding processes and coding parameters for coding video data are provided for. A coder may select coding parameters for video data according to a default coding policy. The default coding policy may include selection of prediction modes (e.g., intra-coding or inter-coding) for each pixel group in each frame. A video coder may select some pixel groups in a frame to be coded as refresh pixel groups as an exception to the default assignment policies. The selection of refresh pixel groups may be based on prediction relationships among multiple frames of source video data. The default coding of the refresh pixel groups is then modified to enhanced the coding of the refresh pixel groups. The refresh pixel groups may permit fewer intra (I) frames be sent and/or may improve the quality of the recovered video.

    摘要翻译： 提供了用于改进用于编码视频数据的编码处理和编码参数的装置和方法。 编码器可以根据默认编码策略选择视频数据的编码参数。 默认编码策略可以包括对每个帧中的每个像素组的预测模式（例如，帧内编码或帧间编码）的选择。 视频编码器可以将要编码的帧中的一些像素组选择为刷新像素组，作为默认分配策略的例外。 刷新像素组的选择可以基于源视频数据的多个帧之间的预测关系。 然后修改刷新像素组的默认编码以增强刷新像素组的编码。 刷新像素组可以允许更少的帧内（I）帧被发送和/或可以提高恢复的视频的质量。

    Complexity-aware encoding
    9.
    发明授权
    Complexity-aware encoding 有权
    复杂性感知编码

    公开(公告)号：US07969333B2

    公开(公告)日：2011-06-28

    申请号：US12256271

    申请日：2008-10-22

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

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

    IPC分类号： H03M7/34 ,  H03M7/38

    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。

    Facial pose improvement with perspective distortion correction
    10.
    发明授权
    Facial pose improvement with perspective distortion correction 有权
    透视失真校正的面部姿态改善

    公开(公告)号：US08599238B2

    公开(公告)日：2013-12-03

    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： H04N7/14

    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。