公开(公告)号：US09338478B2

公开(公告)日：2016-05-10

申请号：US14578304

申请日：2014-12-19

Applicant: Cisco Technology, Inc.

Inventor： Wen-hsiung Chen ,  Yian Xu

IPC: H04N19/176 ,  H04N19/91 ,  H03M7/40 ,  H04N19/46 ,  H04N19/13 ,  H04N19/134 ,  H04N19/124 ,  H04N19/60

CPC classification number: H04N19/91 ,  H03M7/40 ,  H04N19/124 ,  H04N19/13 ,  H04N19/134 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60

Abstract: Classifying a series of quantized transform coefficients of a block of image data into one of a pre-defined plurality of classes for entropy coding, and entropy coding the block. A class is defined by at least the size of the block and typically but not necessarily one or more other factors. The classified series is coded by one of a set of pre-defined entropy coding methods, e.g., variable length coding methods for the pre-defined classes.

公开(公告)号：US09369702B2

公开(公告)日：2016-06-14

申请号：US14185403

申请日：2014-02-20

Applicant: Cisco Technology Inc.

Inventor： Dihong Tian ,  Wen-hsiung Chen ,  Pi Sheng Chang

IPC: H04B1/66 ,  H04J13/00 ,  H04N19/124 ,  H04N19/176 ,  H04N19/196 ,  H04N19/13 ,  H04N19/60 ,  H04N19/167

CPC classification number: H04N19/124 ,  H04N19/13 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/60

Abstract: A coding method, apparatus, and medium with software encoded thereon to implement a coding method. The coding method includes encoding the position of non-zero-valued coefficients in an ordered series of quantized transform coefficients of a block of image data, including encoding events using variable length coding using a plurality of variable length code mappings that each maps events to codewords, the position encoding including switching between the code mappings based on the context. The coding method further includes encoding amplitudes of the non-zero-valued coefficients using variable dimensional amplitude coding in the reverse order of the original ordering of the series.

Abstract translation: 一种编码方法，装置和介质，其上编码有软件以实现编码方法。 编码方法包括编码图像数据块的有序序列量化变换系数中的非零值系数的位置，包括使用可变长度编码的编码事件，该多个可变长度编码映射将事件映射到码字 ，位置编码包括基于上下文的代码映射之间的切换。 编码方法还包括使用可变维度幅度编码以与序列的原始顺序相反的顺序来编码非零值系数的幅度。

公开(公告)号：US20150103893A1

公开(公告)日：2015-04-16

申请号：US14578304

申请日：2014-12-19

Applicant: Cisco Technology, Inc.

Inventor： Wen-hsiung Chen ,  Yian Xu

IPC: H04N19/91 ,  H04N19/60 ,  H04N19/124

CPC classification number: H04N19/91 ,  H03M7/40 ,  H04N19/124 ,  H04N19/13 ,  H04N19/134 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60

Abstract: Classifying a series of quantized transform coefficients of a block of image data into one of a pre-defined plurality of classes for entropy coding, and entropy coding the block. A class is defined by at least the size of the block and typically but not necessarily one or more other factors. The classified series is coded by one of a set of pre-defined entropy coding methods, e.g., variable length coding methods for the pre-defined classes.

Abstract translation: 将图像数据块的一系列量化变换系数分类为用于熵编码的预定义多个类中的一个，以及对该块进行熵编码。 一个类至少由块的大小定义，通常但不一定是一个或多个其他因素。 分类序列由一组预定义熵编码方法中的一种编码，例如用于预定义类的可变长度编码方法。

公开(公告)号：US20130136185A1

公开(公告)日：2013-05-30

申请号：US13749588

申请日：2013-01-24

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Dihong Tian ,  J. William Mauchly ,  Joseph T. Friel ,  Wen-hsiung Chen

IPC: H04N7/26

CPC classification number: H04N19/00569 ,  H04N19/23 ,  H04N19/50 ,  H04N19/537 ,  H04N19/553 ,  H04N19/573 ,  H04N19/61

Abstract: A video coder includes a forward coder and a reconstruction module determining a motion compensated predicted picture from one or more previously decoded pictures in a multi-picture store. The reconstruction module includes a reference picture predictor that uses only previously decoded pictures to determine one or more predicted reference pictures. The predicted reference picture(s) are used for motion compensated prediction. The reference picture predictor may include optical flow analysis that uses a current decoded picture and that may use one or more previously decoded pictures together with affine motion analysis and image warping to determine at least a portion of at least one of the reference pictures.

Abstract translation: 视频编码器包括前向编码器和重构模块，其从多图像存储器中的一个或多个先前解码的图像确定运动补偿预测图像。 重建模块包括参考图像预测器，其仅使用先前解码的图像来确定一个或多个预测参考图像。 预测的参考图像用于运动补偿预测。 参考图像预测器可以包括使用当前解码图像的光流分析，并且可以使用一个或多个先前解码的图像以及仿射运动分析和图像扭曲来确定至少一个参考图片的至少一部分。

公开(公告)号：US20140169453A1

公开(公告)日：2014-06-19

申请号：US14185403

申请日：2014-02-20

Applicant: Cisco Technology Inc.

Inventor： Dihong Tian ,  Wen-hsiung Chen ,  Pi Sheng Chang

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/196 ,  H04N19/167

CPC classification number: H04N19/124 ,  H04N19/13 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/60

Abstract: A coding method, apparatus, and medium with software encoded thereon to implement a coding method. The coding method includes encoding the position of non-zero-valued coefficients in an ordered series of quantized transform coefficients of a block of image data, including encoding events using variable length coding using a plurality of variable length code mappings that each maps events to codewords, the position encoding including switching between the code mappings based on the context. The coding method further includes encoding amplitudes of the non-zero-valued coefficients using variable dimensional amplitude coding in the reverse order of the original ordering of the series.

Abstract translation: 一种编码方法，装置和介质，其上编码有软件以实现编码方法。 编码方法包括编码图像数据块的有序序列量化变换系数中的非零值系数的位置，包括使用可变长度编码的编码事件，该多个可变长度编码映射将事件映射到码字 ，位置编码包括基于上下文的代码映射之间的切换。 编码方法还包括使用可变维度幅度编码以与序列的原始顺序相反的顺序来编码非零值系数的幅度。

公开(公告)号：US08644384B2

公开(公告)日：2014-02-04

申请号：US13749588

申请日：2013-01-24

Applicant: Cisco Technology, Inc.

Inventor： Dihong Tian ,  J. William Mauchly ,  Joseph T. Friel ,  Wen-hsiung Chen

IPC: H04N11/02

CPC classification number: H04N19/00569 ,  H04N19/23 ,  H04N19/50 ,  H04N19/537 ,  H04N19/553 ,  H04N19/573 ,  H04N19/61

Abstract: A video coder includes a forward coder and a reconstruction module determining a motion compensated predicted picture from one or more previously decoded pictures in a multi-picture store. The reconstruction module includes a reference picture predictor that uses only previously decoded pictures to determine one or more predicted reference pictures. The predicted reference picture(s) are used for motion compensated prediction. The reference picture predictor may include optical flow analysis that uses a current decoded picture and that may use one or more previously decoded pictures together with affine motion analysis and image warping to determine at least a portion of at least one of the reference pictures.

Abstract translation: 视频编码器包括前向编码器和重构模块，其从多图像存储器中的一个或多个先前解码的图像确定运动补偿预测图像。 重建模块包括参考图像预测器，其仅使用先前解码的图像来确定一个或多个预测参考图像。 预测的参考图像用于运动补偿预测。 参考图像预测器可以包括使用当前解码图像的光流分析，并且可以使用一个或多个先前解码的图像以及仿射运动分析和图像扭曲来确定至少一个参考图片的至少一部分。