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173 条记录 (耗时 0.029 秒)

    Transcoder for scalable multi-layer constant quality video bitstreams
    1.
    发明授权
    Transcoder for scalable multi-layer constant quality video bitstreams 失效
    用于可扩展多层恒定质量视频比特流的转码器

    公开(公告)号：US06925120B2

    公开(公告)日：2005-08-02

    申请号：US09961987

    申请日：2001-09-24

    申请人： Ximin Zhang ,  Anthony Vetro ,  Yun-Qing Shi ,  Huifang Sun

    发明人： Ximin Zhang ,  Anthony Vetro ,  Yun-Qing Shi ,  Huifang Sun

    IPC分类号： H04N7/26 ,  H04N21/2343 ,  H04N21/2365 ,  H04N21/24 ,  H04N21/2662 ,  H04N21/434 ,  H04N21/4402 ,  H04N7/12

    CPC分类号： H04N21/2662 ,  H04N19/147 ,  H04N19/154 ,  H04N19/19 ,  H04N19/33 ,  H04N19/34 ,  H04N19/40 ,  H04N21/234327 ,  H04N21/23655 ,  H04N21/2402 ,  H04N21/4347

    摘要： A method codes an output bitstream of an input video so the decoded output bitstream has a constant perceived quality. A base layer bitstream having a constant bit-rate is generated from the input video, and an input enhancement layer bitstream is generated from a difference between the input video and the base layer bitstream. Rate and distortion characteristics are extracted from the base layer bitstream and the input enhancement layer bitstream, and an output enhancement layer bitstream having a variable bit-rate is generated from the input enhancement layer bitstream according to the rate and distortion characteristics. The base layer bitstream and the output enhancement layer bitstream, in combination, form an output bitstream having a variable bit-rate and a constant distortion.

    摘要翻译： 一种方法对输入视频的输出比特流进行编码，使得解码的输出比特流具有恒定的感知质量。 从输入视频产生具有恒定比特率的基本层比特流，并且从输入视频和基本层比特流之间的差异生成输入增强层比特流。 从基本层比特流和输入增强层比特流中提取速率和失真特性，并且根据速率和失真特性从输入增强层比特流生成具有可变比特率的输出增强层比特流。 基本层比特流和输出增强层比特流组合形成具有可变比特率和恒定失真的输出比特流。

    System and method for adaptive field and frame video encoding using motion activity
    2.
    发明授权
    System and method for adaptive field and frame video encoding using motion activity 失效
    使用运动活动的自适应场和帧视频编码的系统和方法

    公开(公告)号：US07092442B2

    公开(公告)日：2006-08-15

    申请号：US10325986

    申请日：2002-12-19

    申请人： Ximin Zhang ,  Anthony Vetro ,  Huifang Sun

    发明人： Ximin Zhang ,  Anthony Vetro ,  Huifang Sun

    IPC分类号： H04N7/12

    CPC分类号： H04N19/137 ,  H04N19/112 ,  H04N19/172

    摘要： A method adaptively encodes a video including a sequence of images, where each image is a picture of two fields. Each image is first separated into a top-field and a bottom-field. Motion activity is extracted from the top-field and the bottom-field, and each image is encoded using either frame encoding or field encoding depending on the extracted motion activity.

    摘要翻译： 一种自适应地编码包括图像序列的视频，其中每个图像是两个场的图像。 每个图像首先分为顶场和底场。 从顶场和底场提取运动活动，并且根据提取的运动活动，使用帧编码或场编码对每个图像进行编码。

    System and method for determining coding modes, DCT types and quantizers for video coding
    3.
    发明授权
    System and method for determining coding modes, DCT types and quantizers for video coding 失效
    用于确定编码模式的系统和方法，用于视频编码的DCT类型和量化器

    公开(公告)号：US07280597B2

    公开(公告)日：2007-10-09

    申请号：US10602963

    申请日：2003-06-24

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

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

    IPC分类号： H04N7/12 ,  H04N11/02

    CPC分类号： H04N19/192 ,  H04N19/112 ,  H04N19/122 ,  H04N19/124 ,  H04N19/147 ,  H04N19/149 ,  H04N19/172 ,  H04N19/19 ,  H04N19/196 ,  H04N19/197 ,  H04N19/61

    摘要： A method encodes a video by first measuring a variance of pixel intensities in a current frame. A number of bits to encode the current frame is assigned according to rate and buffer fullness constraints. A multiplier value is determined directly as a function of only the variance and the number of bits assigned to the current frame. Motion vectors between a reference frame and the current frame are estimated, and a sum of absolute difference (SAD) is based on a motion compensated residual between the reference frame and the current frame. An encoding mode is determined for each macro block in the current frame based on the sum of absolute difference, the motion vectors and the multiplier value. Then, the motion compensated residual is encoded based on the encoding mode, multiplier value and the number of allocated bits.

    摘要翻译： 一种方法通过首先测量当前帧中的像素强度的方差来对视频进行编码。 根据速率和缓冲区满足约束来分配对当前帧进行编码的位数。 根据分配给当前帧的方差和比特数，直接确定乘数值。 估计参考帧与当前帧之间的运动向量，并且绝对差（SAD）之和基于参考帧与当前帧之间的运动补偿残差。 基于绝对差，运动矢量和乘数值之和确定当前帧中的每个宏块的编码模式。 然后，基于编码模式，乘数值和分配位数来对运动补偿残差进行编码。

    Method and System for Decoding Multiview Videos with Prediction Dependencies
    4.
    发明申请
    Method and System for Decoding Multiview Videos with Prediction Dependencies 有权
    用预测依赖关系解码多视点视频的方法和系统

    公开(公告)号：US20100322311A1

    公开(公告)日：2010-12-23

    申请号：US12871249

    申请日：2010-08-30

    申请人： Anthony Vetro ,  Huifang Sun ,  Jun Xin ,  Emin Martinian ,  Alexander Behrens

    发明人： Anthony Vetro ,  Huifang Sun ,  Jun Xin ,  Emin Martinian ,  Alexander Behrens

    IPC分类号： H04N7/32

    CPC分类号： H04N19/615 ,  H04N19/105 ,  H04N19/13 ,  H04N19/46 ,  H04N19/597 ,  H04N19/61 ,  H04N19/63

    摘要： 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. The method also decodes multiview videos by maintaining a reference picture list for a current frame of a plurality of multiview videos, and predicting each current frame of the plurality of multiview videos according to reference pictures indexed by the associated reference picture list.

    摘要翻译： 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。 该方法还通过维护多个多视角视频的当前帧的参考图片列表，并根据由相关参考图片列表索引的参考图片来预测多个多视角视频中的每个当前帧来对多视点视频进行解码。

    Error resilient encoding method for inter-frames of compressed videos
    8.
    发明授权
    Error resilient encoding method for inter-frames of compressed videos 失效
    压缩视频帧间错误弹性编码方法

    公开(公告)号：US07324698B2

    公开(公告)日：2008-01-29

    申请号：US10717679

    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： G06K9/36

    CPC分类号： H04N19/513 ,  H04N19/895

    摘要： A method encodes an inter-frame of a compressed video, the inter-frame including multiple macroblocks in a predetermined order. Each macroblock has an associated motion vector. For each current macroblock in the predetermined order, a set of near macroblocks are identified. An index is assigned to each near macroblock. A difference between the motion vector of the current macroblock and the motion vector of each near macroblocks is determined. The indices of the near macroblocks are then sorted in order of the differences and appended to the inter-frame.

    摘要翻译： 方法对压缩视频的帧间进行编码，帧间以预定顺序包括多个宏块。 每个宏块具有相关的运动矢量。 对于按照预定顺序的每个当前宏块，识别一组近似的宏块。 索引被分配给每个近似的宏块。 确定当前宏块的运动矢量与每个近似宏块的运动矢量之间的差异。 然后按照差异的顺序对近宏块的索引进行排序并附加到帧间。

    Method and system for synthesizing multiview videos
    10.
    发明申请
    Method and system for synthesizing multiview videos 有权
    合成多视点视频的方法和系统

    公开(公告)号：US20060146138A1

    公开(公告)日：2006-07-06

    申请号：US11292167

    申请日：2005-11-30

    申请人： Jun Xin ,  Emin Martinian ,  Alexander Behrens ,  Anthony Vetro ,  Huifang Sun

    发明人： Jun Xin ,  Emin Martinian ,  Alexander Behrens ,  Anthony Vetro ,  Huifang Sun

    IPC分类号： H04N5/225

    CPC分类号： H04N19/615 ,  H04N19/103 ,  H04N19/105 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/597 ,  H04N19/61 ,  H04N19/63

    摘要： A system and method synthesizes multiview videos. Multiview videos are acquired of a scene with corresponding cameras arranged at a poses such that there is view overlap between any pair of cameras. A synthesized multiview video is generated from the acquired multiview videos for a virtual camera. A reference picture list is maintained for each current frame of each of the multiview videos and the synthesized video. The reference picture list indexes temporal reference pictures and spatial reference pictures of the acquired multiview videos and the synthesized reference pictures of the synthesized multiview video. Then, each current frame of the multiview videos is predicted according to reference pictures indexed by the associated reference picture list during encoding and decoding.

    摘要翻译： 系统和方法合成多视点视频。 获取多视角视频，其中相应的相机布置成姿势，使得在任何一对相机之间存在视图重叠。 从获取的用于虚拟相机的多视点视频生成合成的多视角视频。 为每个多视角视频和合成视频的每个当前帧维护参考图片列表。 参考图片列表索引所获取的多视角视频的时间参考图片和空间参考图片以及合成的多视角视频的合成参考图片。 然后，在编码和解码期间，根据由相关联的参考图片列表索引的参考图片来预测多视图视频的每个当前帧。