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：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。