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    METHOD AND APPARATUS FOR RATE CONTROL ACCURACY IN VIDEO ENCODING
    4.
    发明申请
    METHOD AND APPARATUS FOR RATE CONTROL ACCURACY IN VIDEO ENCODING 有权
    视频编码中速率控制精度的方法与装置

    公开(公告)号：US20110051807A1

    公开(公告)日：2011-03-03

    申请号：US12735441

    申请日：2009-01-15

    申请人： Yali Liu ,  Qian Xu ,  Xiaoan Lu ,  Cristina Gomila

    发明人： Yali Liu ,  Qian Xu ,  Xiaoan Lu ,  Cristina Gomila

    IPC分类号： H04N7/26

    CPC分类号： H04N19/192 ,  H04N19/124 ,  H04N19/149 ,  H04N19/172 ,  H04N19/176 ,  H04N19/61

    摘要： A method and apparatus are provided for rate control accuracy in video encoding. The apparatus includes a video encoder for encoding image data in a single encoding pass using rate control. The rate control involves defining a quantization step size value and a rounding offset value and refining at least the rounding offset value. The image data is encoded responsive to the quantization step size value and the refined rounding offset value.

    摘要翻译： 提供了一种用于视频编码中的速率控制精度的方法和装置。 该装置包括用于使用速率控制在单个编码通道中对图像数据进行编码的视频编码器。 速率控制涉及定义量化步长值和舍入偏移值，并且至少精炼舍入偏移值。 响应于量化步长值和精化舍入偏移值来编码图像数据。

    Method and apparatus for joint quantization parameter adjustment
    5.
    发明申请
    Method and apparatus for joint quantization parameter adjustment 有权
    联合量化参数调整的方法和装置

    公开(公告)号：US20100290524A1

    公开(公告)日：2010-11-18

    申请号：US12800263

    申请日：2010-05-12

    申请人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    发明人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    IPC分类号： H04N7/32

    CPC分类号： H04N19/00157 ,  H04N19/124 ,  H04N19/14 ,  H04N19/154 ,  H04N19/176 ,  H04N19/61

    摘要： The present principles provides a method and apparatus for jointly adjusting the rounding offset and the quantization step size on a macroblock level to improve the perceptual quality of the fine details of the encoded image. In one implementation, the content of the pictures is analyzed and the smooth regions are identified. A quantization step size value for the picture is initially defined and a rounding offset is adaptively assigned to each macroblock based on the content characteristics. The quantization step size is then calculated for the a particular macroblock according to another content characteristic of the macroblock such that the encoding of the particular macroblock is performed in response to the calculated quantization step size and the rounding offset value of the first block.

    摘要翻译： 本发明提供了一种用于在宏块级别上联合调整舍入偏移量和量化步长的方法和装置，以提高编码图像的精细细节的感知质量。 在一个实现中，分析图像的内容并且识别平滑区域。 最初定义图像的量化步长值，并且基于内容特征对每个宏块自适应地分配舍入偏移。 然后根据宏块的另一内容特性，针对特定宏块计算量化步长，使得响应于计算出的量化步长和第一块的舍入偏移值执行特定宏块的编码。

    METHODS AND APPARATUS FOR IMPROVED QUANTIZATION ROUNDING OFFSET ADJUSTMENT FOR VIDEO ENCODING AND DECODING
    7.
    发明申请
    METHODS AND APPARATUS FOR IMPROVED QUANTIZATION ROUNDING OFFSET ADJUSTMENT FOR VIDEO ENCODING AND DECODING 有权
    用于改进视频编码和解码的改进量化偏移调整的方法和装置

    公开(公告)号：US20120051421A1

    公开(公告)日：2012-03-01

    申请号：US13319779

    申请日：2010-05-12

    申请人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    发明人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    IPC分类号： H04N7/26

    CPC分类号： H04N19/179 ,  H04N19/124 ,  H04N19/14 ,  H04N19/159 ,  H04N19/17 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176

    摘要： There are provided methods and apparatus for improved quantization rounding offset adjustment for video encoding and decoding. An apparatus includes a video encoder for encoding an input coding unit by determining a residual for the input coding unit corresponding to a difference between the input coding unit and a reference coding unit, applying a transform to the residual to obtain at least one transform coefficient, and quantizing the at least one transform coefficient by selecting a particular quantization step size and a rounding offset.

    摘要翻译： 提供了用于改进用于视频编码和解码的量化舍入偏移调整的方法和装置。 一种装置，包括：视频编码器，用于通过确定与输入编码单元和参考编码单元之间的差异对应的输入编码单元的残差来对输入编码单元进行编码，向残差应用变换以获得至少一个变换系数， 以及通过选择特定的量化步长和舍入偏移量化所述至少一个变换系数。

    Method and apparatus for joint quantization parameter adjustment
    8.
    发明授权
    Method and apparatus for joint quantization parameter adjustment 有权
    联合量化参数调整的方法和装置

    公开(公告)号：US08848788B2

    公开(公告)日：2014-09-30

    申请号：US12800263

    申请日：2010-05-12

    申请人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    发明人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    IPC分类号： H04N7/32 ,  H04N19/124 ,  H04N19/154 ,  H04N19/61 ,  H04N19/14 ,  H04N19/176

    CPC分类号： H04N19/00157 ,  H04N19/124 ,  H04N19/14 ,  H04N19/154 ,  H04N19/176 ,  H04N19/61

    摘要： The present principles provides a method and apparatus for jointly adjusting the rounding offset and the quantization step size on a macroblock level to improve the perceptual quality of the fine details of the encoded image. In one implementation, the content of the pictures is analyzed and the smooth regions are identified. A quantization step size value for the picture is initially defined and a rounding offset is adaptively assigned to each macroblock based on the content characteristics. The quantization step size is then calculated for the a particular macroblock according to another content characteristic of the macroblock such that the encoding of the particular macroblock is performed in response to the calculated quantization step size and the rounding offset value of the first block.

    摘要翻译： 本发明提供了一种用于在宏块级别上联合调整舍入偏移量和量化步长的方法和装置，以提高编码图像的精细细节的感知质量。 在一个实现中，分析图像的内容并且识别平滑区域。 最初定义图像的量化步长值，并且基于内容特征对每个宏块自适应地分配舍入偏移。 然后根据宏块的另一内容特性，针对特定宏块计算量化步长，使得响应于计算出的量化步长和第一块的舍入偏移值执行特定宏块的编码。

    Methods and apparatus for enhanced performance in a multi-pass video recorder
    10.
    发明申请
    Methods and apparatus for enhanced performance in a multi-pass video recorder 有权
    用于在多路视频录像机中增强性能的方法和装置

    公开(公告)号：US20090323803A1

    公开(公告)日：2009-12-31

    申请号：US12309249

    申请日：2007-06-15

    申请人： Cristina Gomila ,  Xiaoan Lu ,  Gokce Dane

    发明人： Cristina Gomila ,  Xiaoan Lu ,  Gokce Dane

    IPC分类号： H04N7/66 ,  H04N7/24 ,  H04N7/26

    CPC分类号： H04N19/86 ,  H04N19/115 ,  H04N19/117 ,  H04N19/154 ,  H04N19/156 ,  H04N19/162 ,  H04N19/172 ,  H04N19/179 ,  H04N19/192 ,  H04N19/61 ,  H04N19/82

    摘要： There are provided methods and apparatus for enhanced performance in a multi-pass video encoder. An apparatus includes a video encoder for encoding a video bitstream. The apparatus further includes a video quality analyzer, in signal communication with the encoder, for performing a video quality analysis of the video bitstream for a given encoding pass to detect encoder compression artifacts in the video bitstream, and providing to the encoder information relating to the encoder compression artifacts to enable a re-encoding setup of the encoder to reduce an occurrence of the encoder compression artifacts in subsequent re-encoding passes. At least one of the video quality analysis and the re-encoding setup are automated.

    摘要翻译： 提供了用于在多通道视频编码器中增强性能的方法和装置。 一种装置包括用于对视频比特流进行编码的视频编码器。 该装置还包括与编码器进行信号通信的视频质量分析器，用于对于给定的编码遍进行视频比特流的视频质量分析，以检测视频比特流中的编码器压缩伪像，并向编码器提供与 编码器压缩伪影以使编码器的重新编码设置能够减少随后的重新编码遍中的编码器压缩伪影的发生。 视频质量分析和重新编码设置中的至少一个是自动化的。