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    Video transcoder with spatial resolution reduction
    1.
    发明授权
    Video transcoder with spatial resolution reduction 有权
    具有空间分辨率降低的视频转码器

    公开(公告)号：US06671322B2

    公开(公告)日：2003-12-30

    申请号：US09853394

    申请日：2001-05-11

    申请人： Anthony Vetro ,  Huifang Sun ,  Peng Yin ,  Bede Liu ,  Tommy C. Poon

    发明人： Anthony Vetro ,  Huifang Sun ,  Peng Yin ,  Bede Liu ,  Tommy C. Poon

    IPC分类号： H04N712

    CPC分类号： H04N19/40 ,  G06T3/4084 ,  H04N19/48 ,  H04N19/90

    摘要： A method transcodes groups of macroblocks of a partially decoded input bitstream. The groups of macroblocks include intra-mode and inter-mode macroblocks. Each macroblock includes DCT coefficients, and at least one motion vector. The modes of each group of macroblocks are mapped to be identical only if there is an inter-mode block and an intra-mode macroblock in the group. If any of the macroblocks in the group are mapped, then the DCT coefficients and the motion vector for such mapped macroblocks are modified in accordance with the mapping to generate reduced-resolution macroblock for an output compressed bitstream to compensate for drift.

    摘要翻译： 一种方法对部分解码的输入比特流的宏块组进行转码。 宏块组包括帧内模式和模式间宏块。 每个宏块包括DCT系数和至少一个运动矢量。 每组宏块的模式只有在组中有模式间模块和模式内宏块时才被映射为相同模式。 如果组中的任何宏块被映射，则根据映射来修改这些映射宏块的DCT系数和运动矢量，以生成用于输出压缩比特流的减小分辨率的宏块以补偿漂移。

    Video transcoder with spatial resolution reduction and drift compensation
    2.
    发明授权
    Video transcoder with spatial resolution reduction and drift compensation 有权
    具有空间分辨率降低和漂移补偿的视频转码器

    公开(公告)号：US07170932B2

    公开(公告)日：2007-01-30

    申请号：US10046366

    申请日：2002-01-14

    申请人： Anthony Vetro ,  Huifang Sun ,  Peng Yin ,  Bede Liu

    发明人： Anthony Vetro ,  Huifang Sun ,  Peng Yin ,  Bede Liu

    IPC分类号： H04B1/66

    CPC分类号： G06T3/4084 ,  H04N19/40 ,  H04N19/48 ,  H04N19/90

    摘要： A method and system reduces the spatial resolution of a compressed bitstream of a sequence of frames of a video signal by first decoding the frames, and storing the decoded frames in a first frame buffer. While performing the decoding, motion compensating is performed with full resolution motion vectors of the stored decoded frames. The decoded frames are then down-sampled to a reduced resolution, and stored in a second frame buffer. The reduced resolution frames are partially encoded to produce a reduced resolution compressed bitstream of the video. While performing the partial encoding, motion compensation is performed with reduced resolution motion vectors of the stored reduced resolution frames.

    摘要翻译： 一种方法和系统通过首先对帧进行解码并将解码的帧存储在第一帧缓冲器中来降低视频信号的帧序列的压缩比特流的空间分辨率。 在执行解码时，利用所存储的解码帧的全分辨率运动矢量来执行运动补偿。 然后将经解码的帧进行下采样以降低分辨率，并存储在第二帧缓冲器中。 缩小分辨率帧被部分编码以产生视频的降低分辨率的压缩比特流。 在执行部分编码的同时，利用所存储的分辨率降低的帧的分辨率降低的运动矢量执行运动补偿。

    Video transcoder with drift compensation
    3.
    发明授权
    Video transcoder with drift compensation 有权
    具有漂移补偿的视频转码器

    公开(公告)号：US07088780B2

    公开(公告)日：2006-08-08

    申请号：US09854020

    申请日：2001-05-11

    申请人： Anthony Vetro ,  Huifang Sun ,  Peng Yin ,  Bede Liu ,  Tommy C. Poon

    发明人： Anthony Vetro ,  Huifang Sun ,  Peng Yin ,  Bede Liu ,  Tommy C. Poon

    IPC分类号： H04N7/12

    CPC分类号： H04N19/59 ,  H04N19/107 ,  H04N19/40 ,  H04N19/51 ,  H04N19/61

    摘要： A method compensates for drift in macroblocks of a partially decoded input bitstream. The macroblocks include intra-mode and inter-mode macroblocks, and each macroblock includes DCT coefficients, and at least one motion vector. An estimate of drift is measured in the partially decoded input bitstream. The estimated drift is translated into an intra refresh rate. The modes of inter-mode macroblock are mapped to intra-mode macroblock according to the refresh rate. The DCT coefficients and the motion vector for each changed macroblock are modified in accordance with the mapping for each changed macroblock.

    摘要翻译： 一种补偿部分解码的输入比特流的宏块中的漂移的方法。 宏块包括帧内模式和帧间模式宏块，并且每个宏块包括DCT系数和至少一个运动矢量。 在部分解码的输入比特流中测量漂移的估计。 估计漂移被转换成内部刷新率。 模式间宏块的模式根据刷新率映射到模式内宏块。 根据每个改变的宏块的映射来修改每个改变的宏块的DCT系数和运动矢量。

    Optimal bit allocation for error resilient video transcoding
    6.
    发明申请
    Optimal bit allocation for error resilient video transcoding 审中-公开
    用于错误弹性视频转码的最佳位分配

    公开(公告)号：US20050175109A1

    公开(公告)日：2005-08-11

    申请号：US10776571

    申请日：2004-02-11

    申请人： Anthony Vetro ,  Minghui Xia ,  Bede Liu ,  Huifang Sun

    发明人： Anthony Vetro ,  Minghui Xia ,  Bede Liu ,  Huifang Sun

    IPC分类号： H03M7/30 ,  H04N7/12 ,  H04N19/89 ,  H04N19/895

    CPC分类号： H04N19/68 ,  H04N19/107 ,  H04N19/126 ,  H04N19/147 ,  H04N19/172 ,  H04N19/19 ,  H04N19/40 ,  H04N19/61 ,  H04N19/89 ,  H04N19/895

    摘要： A method transcodes an input video to an output video, which can have a lower bit rate than the input video. Sets of rate values and corresponding sets of distortion values are determined for each components of the output video. There is one set of rate values and one corresponding set of distortion values for each component in the output video. The components include a requantization of the input video, inserted resynchronization markers, and inserted intra-blocks. Then, bits are allocated to each of the components in the output video according to the associated set of rate values and the associated corresponding set of distortion values.

    摘要翻译： 一种方法将输入视频转码为输出视频，其可以具有比输入视频更低的比特率。 为输出视频的每个组件确定速率值和相应的失真值集合。 输出视频中的每个组件有一组速率值和一组对应的失真值。 这些组件包括输入视频的重新排序，插入的重新同步标记和插入的块内块。 然后，根据相关联的一组速率值和相应的对应的失真值组，将比特分配给输出视频中的每个分量。

    Method and System for Decoding Multiview Videos with Prediction Dependencies
    7.
    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
    10.
    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。