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    SKIP MODES FOR INTER-LAYER RESIDUAL VIDEO CODING AND DECODING
    51.
    发明申请
    SKIP MODES FOR INTER-LAYER RESIDUAL VIDEO CODING AND DECODING 有权
    用于层间残留视频编码和解码的跳过模式

    公开(公告)号：US20100061447A1

    公开(公告)日：2010-03-11

    申请号：US12205689

    申请日：2008-09-05

    申请人： Chengjie Tu ,  Shankar Regunathan ,  Shijun Sun ,  Chih-Lung Lin

    发明人： Chengjie Tu ,  Shankar Regunathan ,  Shijun Sun ,  Chih-Lung Lin

    IPC分类号： H04N7/12

    CPC分类号： H04N21/234381 ,  H04N19/103 ,  H04N19/132 ,  H04N19/147 ,  H04N19/176 ,  H04N19/187 ,  H04N19/33 ,  H04N19/51 ,  H04N19/61 ,  H04N21/2383

    摘要： Techniques and tools for skip modes in encoding and decoding of inter-layer residual video are described. For example, an encoder encodes multiple macroblocks of a picture of inter-layer residual video. For a current macroblock that is skipped, the encoder selects a skip mode from among multiple available skip modes and uses the selected skip mode when encoding the current macroblock. The skip modes can include intra skip mode and predicted-motion skip mode. A corresponding decoder, for the current macroblock, selects and uses the skip mode for the current macroblock during decoding. As another example, an encoder encodes multiple channels of a picture of inter-layer residual video. For each channel, the encoder determines whether to skip the channel. The encoder signals channel skip information to indicate which channels are skipped. A corresponding decoder parses the channel skip information and determines on a channel-by-channel basis whether to skip the respective channels.

    摘要翻译： 描述了层间残差视频编码和解码中跳过模式的技术和工具。 例如，编码器编码层间残留视频的图像的多个宏块。 对于跳过的当前宏块，编码器从多个可用跳过模式中选择跳过模式，并且在对当前宏块进行编码时使用所选择的跳过模式。 跳过模式可以包括帧内跳过模式和预测运动跳过模式。 对于当前宏块，对应的解码器在解码期间选择并使用当前宏块的跳过模式。 作为另一示例，编码器对层间残留视频的图像的多个信道进行编码。 对于每个通道，编码器确定是否跳过通道。 编码器信号通道跳过信息以指示哪些通道被跳过。 相应的解码器解析信道跳过信息，并且逐个信道地确定是否跳过相应的信道。

    Method for reducting IDCT calculations in video decoding
    53.
    发明申请
    Method for reducting IDCT calculations in video decoding 有权
    在视频解码中减少IDCT计算的方法

    公开(公告)号：US20070223828A1

    公开(公告)日：2007-09-27

    申请号：US11805172

    申请日：2007-05-22

    申请人： Shijun Sun ,  Shawmin Lei

    发明人： Shijun Sun ,  Shawmin Lei

    IPC分类号： G06K9/36

    CPC分类号： G06F17/147 ,  G06T9/007

    摘要： Reduced complexity inverse discrete cosine transform (IDCT) masks and a method for reducing the number of IDCT calculations in video decoding are provided. The method comprises: accepting an n×m matrix of DCT coefficients; performing (n−y) horizontal IDCT operations, where y is greater than 0; performing y scaling operations; and, generating an n×m block of pixel information. Some aspects of the method further comprise: performing (m−z) vertical IDCT operations, where z is in the range between 0 and m/2. In some aspects, performing (n−y) horizontal ICDT operations includes performing IDCT operations for the first (n−y) horizontal rows. Then, performing y scaling operations includes: selecting the DC component from the first position of each horizontal row; scaling the selected DC component; and, copying the scaled DC component into the remaining positions of each of horizontal row.

    摘要翻译： 提供了复杂度降低的离散余弦变换（IDCT）掩模和减少视频解码中IDCT计算次数的方法。 该方法包括：接受DCT系数的n×m矩阵; 执行（n-y）水平IDCT操作，其中y大于0; 执行y缩放操作; 并且生成像素信息的n×m块。 该方法的一些方面还包括：执行（m-z）垂直IDCT操作，其中z在0和m / 2之间的范围内。 在一些方面，执行（n-y）个水平ICDT操作包括执行第一（n-y）个水平行的IDCT操作。 然后，执行y缩放操作包括：从每个水平行的第一位置选择DC分量; 缩放选定的直流分量; 并且将缩放的直流分量复制到水平行中的每一个的剩余位置。

    Intra prediction skipping in mode selection for video compression
    55.
    发明申请
    Intra prediction skipping in mode selection for video compression 审中-公开
    帧内预测在视频压缩模式选择中跳过

    公开(公告)号：US20070140353A1

    公开(公告)日：2007-06-21

    申请号：US11313074

    申请日：2005-12-19

    申请人： Shijun Sun

    发明人： Shijun Sun

    IPC分类号： H04N11/04 ,  H04N7/12

    CPC分类号： H04N19/577 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176 ,  H04N19/196 ,  H04N19/51

    摘要： Video compression wherein intra mode selection is accelerated by examining the coding mode of neighboring blocks: With respect to a macroblocks in a P picture, the following macroblocks are examined to determine whether or not the intra mode calculations for a particular macroblock can be skipped: a) The neighboring macroblock above the particular macroblock. b) The neighboring macroblock to the left of the particular macroblock. c) The collocated macroblock in the first available reference picture. d) The neighboring macroblock below the collocated macroblock in the first available reference picture. e) The neighboring macroblock to the right of the collocated macroblock in the first available reference picture. With respect to macroblocks in a B picture, the following blocks are examined to determine whether or not the intra mode calculations for a particular macroblock can be skipped: a) The collocated macroblock in the first available forward reference picture. b) The collocated macroblock in the first available backward reference picture.

    摘要翻译： 视频压缩，其中通过检查相邻块的编码模式来加速帧内模式选择：对于P图像中的宏块，检查以下宏块以确定是否可跳过特定宏块的帧内模式计算：a ）特定宏块之上的相邻宏块。 b）特定宏块左侧的相邻宏块。 c）第一可用参考图片中的并置宏块。 d）第一可用参考图像中并置宏块下面的相邻宏块。 e）第一可用参考图片中并置宏块右侧的相邻宏块。 对于B图像中的宏块，检查以下块以确定是否可以跳过特定宏块的帧内模式计算：a）第一可用的前向参考图像中的并置宏块。 b）第一个可用的后向参考图片中的并置宏块。

    Method and apparatus for dynamically adjusting quantization offset values
    56.
    发明申请
    Method and apparatus for dynamically adjusting quantization offset values 有权
    用于动态调整量化偏移值的方法和装置

    公开(公告)号：US20070140334A1

    公开(公告)日：2007-06-21

    申请号：US11313553

    申请日：2005-12-20

    申请人： Shijun Sun

    发明人： Shijun Sun

    IPC分类号： H04N11/04 ,  H04N7/12

    CPC分类号： H04N19/126

    摘要： An encoding scheme dynamically adjusts a quantization rounding offset parameter used for encoding pictures according to statistics of previously encoded pictures of similar type. A look-up table can be used to store different relative quantization rounding offset parameters associated with different numbers of bits required to encode the pictures. The dynamically adjusted quantization rounding offset scheme achieves better coding performance at high bit rates. In one example, the dynamic quantization offset values are applied to a Uniform-Reconstruction-Quantizer (URQ) used for Laplacian sources.

    摘要翻译： 编码方案根据先前编码的类似图像的图像的统计，动态地调整用于编码图像的量化舍入偏移参数。 可以使用查找表来存储与编码图片所需的不同比特数相关联的不同相对量化舍入偏移参数。 动态调整的量化舍入偏移方案在高比特率下实现更好的编码性能。 在一个示例中，动态量化偏移值被应用于用于拉普拉斯源的均匀重建量化器（URQ）。

    Method and apparatus for global motion estimation
    57.
    发明授权
    Method and apparatus for global motion estimation 有权
    全球运动估计的方法和装置

    公开(公告)号：US07227896B2

    公开(公告)日：2007-06-05

    申请号：US10094043

    申请日：2002-03-08

    申请人： Shijun Sun

    发明人： Shijun Sun

    IPC分类号： H04N7/12 ,  G06K9/36

    CPC分类号： H04N19/527 ,  H04N5/145 ,  H04N19/61

    摘要： Different combinations of global motion parameters are estimated for a current frame interpolated to derive local motion vectors for individual image blocks. Image blocks in a reference frame identified by the local motion vectors are compared to the image blocks in the current frame. The estimated global motion parameters that provide the best match between the image blocks in the current frame and the reference frame are selected for encoding the current frame. Selected sub regions of temporally consecutive image frame s can be used in order to release the computational burden for global motion estimation and provide more robust global motion estimation results. A data truncation method can also be used to remove bias caused by foreground moving objects.

    摘要翻译： 针对内插的当前帧估计全局运动参数的不同组合，以导出各个图像块的局部运动矢量。 将由局部运动矢量标识的参考帧中的图像块与当前帧中的图像块进行比较。 选择在当前帧中的图像块与参考帧之间提供最佳匹配的估计全局运动参数用于对当前帧进行编码。 可以使用时间上连续的图像帧的选择的子区域，以便释放全局运动估计的计算负担并且提供更加鲁棒的全局运动估计结果。 数据截断方法也可以用来消除由前景移动对象引起的偏差。