公开(公告)号：US20060215058A1

公开(公告)日：2006-09-28

申请号：US11091853

申请日：2005-03-28

申请人： Tiehan Lu ,  Jorge Caviedes ,  Walid Ali ,  Tsung-Hsin Lu ,  Raju Hormis

发明人： Tiehan Lu ,  Jorge Caviedes ,  Walid Ali ,  Tsung-Hsin Lu ,  Raju Hormis

IPC分类号： H04N7/01

CPC分类号： H04N7/012 ,  H04N5/142 ,  H04N7/014 ,  H04N7/0142

摘要： A method includes determining a lowest-score interpolation direction among a plurality of interpolation directions. The method further includes calculating a candidate pixel value by interpolating along the lowest-score interpolation direction. The method further includes applying a median function to a set of pixel values. The set of pixel values includes (a) the candidate pixel value, (b) at least one pixel value from a line of pixels that is immediately above a pixel location that is currently being interpolated, and (c) at least one pixel value from a line of pixel values that is immediately below the pixel location that is currently being interpolated.

公开(公告)号：US20070103485A1

公开(公告)日：2007-05-10

申请号：US11270429

申请日：2005-11-08

申请人： Tiehan Lu ,  Jorge Caviedes ,  Walid Ali

发明人： Tiehan Lu ,  Jorge Caviedes ,  Walid Ali

IPC分类号： G09G5/00

CPC分类号： G09G5/003 ,  G09G2310/0229 ,  G09G2320/0261 ,  H04N5/142 ,  H04N7/012 ,  H04N7/0142

摘要： One implementation of a method for edge directed video de-interlacing in accordance with the disclosed invention includes obtaining at least a portion of a field of input video data including at least portions of four consecutive rows of field pixels including first, second, third, and fourth rows of field pixels. The method further includes selecting an orientation over which to de-interlace the input video data based, at least in part, on a measure of the deviation in pixel values among the four consecutive rows of field pixels and a fifth row of pixels located between the second and third rows of field pixels, the fifth row of pixels including previously interpolated pixel values and pixel values obtained by line averaging between pixel values in the second and third rows of field pixels. The method further includes interpolating along the selected orientation to determine a value for a pixel to be interpolated.

摘要翻译： 根据所公开的发明的用于边缘定向视频去隔行扫描方法的一种实施方式包括：获得输入视频数据的场的至少一部分，其包括包括第一，第二，第三和第 第四行字段像素。 该方法还包括：至少部分地基于四个连续的场像素行之间的像素值的偏差的测量值以及位于第二行像素之间的第五行像素来选择用于去除交错输入视频数据的取向 第二行和第三行像素，第五行像素包括先前内插的像素值和通过在第二和第三行场像素行中的像素值之间的线平均而获得的像素值。 所述方法还包括沿着所选定的方向进行内插以确定要内插的像素的值。

公开(公告)号：US07653257B2

公开(公告)日：2010-01-26

申请号：US11184688

申请日：2005-07-19

申请人： Walid Ali ,  Jorge Caviedes

发明人： Walid Ali ,  Jorge Caviedes

IPC分类号： G06K9/40

CPC分类号： G06T5/003 ,  G06T5/20 ,  G06T2207/10016 ,  G06T2207/20012 ,  G06T2207/20192

摘要： A method of selectively sharpening video data may include, for at least some pixels in the video data, generating a sharpening value for a pixel value in an image. The sharpening value may be amplified in a non-linear manner to produce an amplified value. The pixel value and the amplified value may then be combined.

摘要翻译： 选择性地锐化视频数据的方法可以包括对于视频数据中的至少一些像素，为图像中的像素值生成锐化值。 锐化值可以以非线性方式放大以产生放大值。 然后可以组合像素值和放大值。

公开(公告)号：US20070019880A1

公开(公告)日：2007-01-25

申请号：US11184688

申请日：2005-07-19

申请人： Walid Ali ,  Jorge Caviedes

发明人： Walid Ali ,  Jorge Caviedes

IPC分类号： G06K9/40

CPC分类号： G06T5/003 ,  G06T5/20 ,  G06T2207/10016 ,  G06T2207/20012 ,  G06T2207/20192

摘要： A method of selectively sharpening video data may include, for at least some pixels in the video data, generating a sharpening value for a pixel value in an image. The sharpening value may be amplified in a non-linear manner to produce an amplified value. The pixel value and the amplified value may then be combined.

摘要翻译： 选择性地锐化视频数据的方法可以包括对于视频数据中的至少一些像素，为图像中的像素值生成锐化值。 锐化值可以以非线性方式放大以产生放大值。 然后可以组合像素值和放大值。

公开(公告)号：US06810083B2

公开(公告)日：2004-10-26

申请号：US09996003

申请日：2001-11-16

申请人： Yingwei Chen ,  Jorge Caviedes

发明人： Yingwei Chen ,  Jorge Caviedes

IPC分类号： H04N712

CPC分类号： H04N17/004 ,  H04N19/60 ,  H04N19/85

摘要： The present invention relates to a method and system for evaluating the quality of encoded video data without gaining access to the source data or the compressed video bitstream. The system is configured to decode compressed video data using an MPEG decoder to produce decompressed video data. The decoded data is analyzed to determine whether the decompressed video data is intra-coded. If so, a discrete cosine transform (DCT) is performed to produce a set of DCT coefficients for at least one AC frequency band in the decompressed video data. At the same time, quantization matrix data of a frame of the decompressed video data as well as a quantizer scale for each block of the decompressed video data are extracted. Thereafter, the variance of the converted DCT coefficients is obtained, and then an average quantization error for each set of said DCT coefficients is determined based on the variance, the quantization matrix, and the quantizer scale. Lastly, a peak signal to noise ratio (PSNR) is calculated based on the resultant average quantization error.

摘要翻译： 本发明涉及一种用于评估编码视频数据的质量而不获取对源数据或压缩视频比特流的访问的方法和系统。 该系统被配置为使用MPEG解码器对压缩的视频数据解码以产生解压缩的视频数据。 分析解码数据以确定解压缩的视频数据是否被帧内编码。 如果是这样，则执行离散余弦变换（DCT）以在解压缩的视频数据中产生用于至少一个AC频带的一组DCT系数。 同时，解压缩的视频数据的帧的量化矩阵数据以及解压缩的视频数据的每个块的量化器标度被提取。 此后，获得转换的DCT系数的方差，然后基于方差，量化矩阵和量化器尺度确定每组所述DCT系数的平均量化误差。 最后，基于所得到的平均量化误差来计算峰值信噪比（PSNR）。

公开(公告)号：US6104705A

公开(公告)日：2000-08-15

申请号：US1319

申请日：1997-12-31

申请人： Nermeen Ismail ,  Hugo J. Strubbe ,  Jorge Caviedes ,  Max Wu

发明人： Nermeen Ismail ,  Hugo J. Strubbe ,  Jorge Caviedes ,  Max Wu

IPC分类号： H04N7/15 ,  H04J3/16 ,  H04N21/6377 ,  H04N21/658 ,  H04L12/16

CPC分类号： H04N21/658 ,  H04N21/6377

摘要： A method by which video compression parameters of different video streams are changed to optimize overall bandwidth utilization according to rules related to the varying interactions among group members. Different video streams are allocated different portions of the overall bandwidth based on a priority scheme. The priority scheme is based upon group dynamics. A controller (central or distributed) receives a group dynamics monitoring signal which monitors the various activities of group members. The controller (central or distributed) uses the network congestion control feedback signal and the priorities assigned to the different video streams to send feedback signals to the different video transmitters requesting the transmitters to adhere to, increase, or decrease their video data rates by changing parameters controlling the video encoding process.

摘要翻译： 通过改变不同视频流的视频压缩参数以根据与组成员之间的变化交互相关的规则来优化总带宽利用率的方法。 基于优先级方案，不同的视频流被分配到总带宽的不同部分。 优先方案是基于群体动力学。 控制器（中央或分布式）接收组动态监控信号，监视组成员的各种活动。 控制器（中央或分布式）使用网络拥塞控制反馈信号和分配给不同视频流的优先级将反馈信号发送到不同的视频发射机，请求发射机通过改变参数来遵守，增加或减少其视频数据速率 控制视频编码过程。

公开(公告)号：US07057636B1

公开(公告)日：2006-06-06

申请号：US09218554

申请日：1998-12-22

申请人： Eric Cohen-Solal ,  Adrian Martel ,  Soumitra Sengupta ,  Hugo Strubbe ,  Jorge Caviedes ,  Mohamed Abdel-Mottaleb ,  Ahmed Elgammal

发明人： Eric Cohen-Solal ,  Adrian Martel ,  Soumitra Sengupta ,  Hugo Strubbe ,  Jorge Caviedes ,  Mohamed Abdel-Mottaleb ,  Ahmed Elgammal

IPC分类号： H04N7/14

CPC分类号： H04N7/15 ,  G01S3/7864 ,  H04N5/232

摘要： A video conferencing system and method which automatically determines the appropriate preset camera parameters corresponding to participants participating in the video conference. A camera zooms out or pans the video conference space and looks for participants based on their faces. When a participant is detected, the preset camera parameters for that participant are calculated for when the center of the participant is in the center of the camera's view. This is continued for all the participants in the room. The optimal position for each participant and corresponding camera parameters are determined based on cultural preferences. Updates in the presets can be made periodically by the camera zooming out or panning the room. Multiple cameras can be used to continually update the presets.

摘要翻译： 视频会议系统和方法，其自动确定与参加视频会议的与会者对应的适当的预设摄像机参数。 相机放大或平移视频会议空间，并根据他们的脸部寻找参与者。 当检测到参与者时，计算参与者的中心在相机视图中心的参与者的预设摄像机参数。 房间里的所有参与者都会继续进行。 每个参与者的最佳位置和相应的摄像机参数是根据文化偏好确定的。 可以通过相机缩小或平移房间来定期更新预设。 可以使用多台摄像机来持续更新预设。

公开(公告)号：US20060139497A1

公开(公告)日：2006-06-29

申请号：US11021779

申请日：2004-12-23

申请人： Jorge Caviedes

发明人： Jorge Caviedes

IPC分类号： H04N5/14

CPC分类号： H04N5/147 ,  H04N19/503 ,  H04N19/61 ,  H04N19/87

摘要： A method for detecting scene cuts and similar pictures in a video sequence, including receiving pictures in a video sequence, extracting a set of features from two temporally consecutive pictures, computing a sum of square errors for the set of features with respect to the features of the previous picture, determining whether the error exceeds a predefined threshold and in response to the error exceeding the predefined threshold, detecting a scene change, and determining whether the error is less than a certain threshold thus detecting a similar picture has been found.

摘要翻译： 一种用于检测视频序列中的场景切割和类似图像的方法，包括以视频序列接收图像，从两个时间上连续的图像中提取一组特征，计算该特征集合的平方误差之和相对于 已经找到前一图像，确定误差是否超过预定阈值，并且响应于超过预定阈值的误差，检测到场景变化，并且确定误差是否小于特定阈值，从而检测到类似图像。

公开(公告)号：US07778330B2

公开(公告)日：2010-08-17

申请号：US10536846

申请日：2003-11-24

申请人： Arnaud Bourge ,  Jorge Caviedes

发明人： Arnaud Bourge ,  Jorge Caviedes

IPC分类号： H04N7/12 ,  G06K9/46

CPC分类号： H04N19/90 ,  H04N19/117 ,  H04N19/136 ,  H04N19/176 ,  H04N19/40 ,  H04N19/527 ,  H04N19/80

摘要： The invention relates to a method of measuring blocking artefacts on the basis of video data encoded in accordance with a block encoding technique. This method comprises a step of computing a monodimensional inverse discrete transform (31) of a first row of a first block of encoded video data, suitable for supplying a value of a first virtual border pixel (vep1). It also comprises a step of computing a monodimensional inverse discrete transform (32) of a first row of a second block of encoded video data, the second block being adjacent to the first block, suitable for supplying a value of a second virtual border pixel (vep2). Finally, the method comprises a step of computing (33) a blocking artefact level (VEP-L) on the basis of an absolute value of the difference between the values of the first and second virtual pixels. This method finds its application, for example, in video encoders, decoders and transcoders.

摘要翻译： 本发明涉及一种基于根据块编码技术编码的视频数据来测量分块伪影的方法。 该方法包括计算适于提供第一虚拟边界像素（vep1）的值的第一编码视频数据块的第一行的一维离散离散变换（31）的步骤。 它还包括计算第二块编码视频数据的第一行的一维逆离散变换（32）的步骤，第二块与第一块相邻，适于提供第二虚拟边界像素的值（ vep2）。 最后，该方法包括基于第一和第二虚拟像素的值之间的差的绝对值来计算（33）阻塞伪影级（VEP-L）的步骤。 该方法可以应用于例如视频编码器，解码器和代码转换器中。

公开(公告)号：US20070071356A1

公开(公告)日：2007-03-29

申请号：US11238710

申请日：2005-09-29

申请人： Jorge Caviedes ,  Mahesh Subedar ,  Wen-Tsung Tang ,  Rony Ferzli

发明人： Jorge Caviedes ,  Mahesh Subedar ,  Wen-Tsung Tang ,  Rony Ferzli

IPC分类号： G06K9/40 ,  G06K9/36

CPC分类号： H04N19/865 ,  H04N19/61 ,  H04N19/86

摘要： A method includes detecting vertical edge pixels in an image and analyzing the detected vertical edge pixels by horizontal location in the image to detect a spatial periodicity in the detected vertical edge pixels. The method further includes detecting horizontal edge pixels in the image, and analyzing the detected horizontal edge pixels by vertical location in the image to detect a spatial periodicity in the detected horizontal edge pixels.

摘要翻译： 一种方法包括检测图像中的垂直边缘像素，并通过图像中的水平位置分析所检测的垂直边缘像素，以检测检测到的垂直边缘像素中的空间周期。 该方法还包括检测图像中的水平边缘像素，以及通过图像中的垂直位置分析检测到的水平边缘像素，以检测检测到的水平边缘像素中的空间周期。