公开(公告)号：EP1530829A4

公开(公告)日：2005-08-31

申请号：EP03762835

申请日：2003-07-09

申请人： NOKIA CORP

发明人： HALLAPURO ANTTI ,  LAINEMA JANI ,  KARCZEWICZ MARTA

IPC分类号： H04N7/32 ,  G06T9/00 ,  H03M7/36 ,  H04N7/12 ,  H04N7/26 ,  H04N7/36 ,  H04B1/66

CPC分类号： H04N19/577 ,  H04N19/117 ,  H04N19/139 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/51 ,  H04N19/523 ,  H04N19/573 ,  H04N19/587 ,  H04N19/80

摘要： A method and system for coding a video sequence based on motion compensated prediction, wherein an interpolation filter is used to generate predicted pixel values for picture blocks in the video sequence. The interpolation filter for use in conjunction with a multi-picture type is shorter or having fewer coefficients than the interpolation filter for use in conjunction with a single-picture type. As such, the complexity of the interpolation filter for the multi-picture type can be reduced. Furthermore, the interpolation filter may be changed based on the characteristics of the block, the size and/or the shape of the block.

摘要翻译： 一种用于基于运动补偿预测对视频序列进行译码的方法和系统（642），其中内插滤波器（640）被用于产生视频序列中的图像块的预测像素值。 与多画面类型一起使用的插值滤波器比与单画面类型结合使用的插值滤波器更短或具有更少的系数。 这样，可以减少用于多图像类型的内插滤波器的复杂度。 此外，内插滤波器可以基于块的特性，块的大小和/或形状而改变。

公开(公告)号：EP2619985A4

公开(公告)日：2015-03-11

申请号：EP11826505

申请日：2011-09-23

申请人： NOKIA CORP

发明人： LAINEMA JANI ,  UGUR KEMAL

IPC分类号： H04N19/12 ,  H04N19/109 ,  H04N19/11 ,  H04N19/122 ,  H04N19/14 ,  H04N19/46 ,  H04N19/61

CPC分类号： H04N19/11 ,  H04N19/107 ,  H04N19/109 ,  H04N19/122 ,  H04N19/13 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61

公开(公告)号：EP1486065A4

公开(公告)日：2006-01-04

申请号：EP03744467

申请日：2003-03-14

申请人： NOKIA CORP

发明人： LAINEMA JANI

IPC分类号： H04N7/26 ,  H04N7/50 ,  H04N5/91

CPC分类号： H04N19/527 ,  H04N19/109 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/463 ,  H04N19/52 ,  H04N19/61

摘要： A method of motion-compensated video encoding that enables a video sequence with a global motion component to be encoded in an efficient manner. A video encoder (600) is arranged to assign macroblocks to be coded to specific coding modes including a skip mode, which is used to indicate one of two possible types of macroblock motion: (a) zero motion, or (b) global or regional motion. As each macroblock is encoded, a previously encoded region surrounding the macroblock is examined and the characteristics of motion in that region determined. With the skip mode, the macroblock to be coded and a motion vector describing the global motion or regional motion is associated with the macroblock if the motion in the region is characteristic of global motion or regional motion. If the region exhibits an insignificant level of motion, a zero valued motion vector is associated with the macroblock.

摘要翻译： 运动补偿视频编码的方法使得能够以有效的方式编码具有全局运动分量的视频序列。 安排视频编码器（600）将要编码的宏块分配给包括跳过模式的特定编码模式，所述跳过模式用于指示两种可能类型的宏块运动中的一种：（a）零运动，或（b）全局或区域 运动。 随着每个宏块被编码，检查宏块周围的先前编码的区域，并确定该区域中的运动特征。 如果该区域中的运动是全局运动或区域运动的特征，则利用跳过模式，将要编码的宏块和描述全局运动或区域运动的运动矢量与宏块相关联。 如果该区域表现出不显着的运动水平，则将零值运动矢量与该宏块相关联。

公开(公告)号：EP2599315A4

公开(公告)日：2014-01-22

申请号：EP11811919

申请日：2011-07-27

申请人： NOKIA CORP

发明人： LAINEMA JANI ,  UGUR KEMAL ,  HALLAPURO ANTTI OLLI

IPC分类号： H04N7/26

CPC分类号： H04N19/463 ,  H04N19/13 ,  H04N19/70

摘要： A method, apparatus and computer program product are provided to enable the provision of efficient processing in the area of video coding and decoding by employing complexity balanced entropy coding in order to provide a high level of capability with respect to video coding and decoding in a cost effective manner. A method includes categorizing a plurality of syntax elements of video content into first and second categories based on a frequency of occurrence of the syntax elements in the video content. The method also entropy codes symbols that correspond to the first category of syntax elements and that have been subjected to a context update. Further, the method entropy codes symbols that correspond to the second category of syntax elements and that have bypassed context updating. A corresponding apparatus and computer program product are also provided.

公开(公告)号：EP1497990A4

公开(公告)日：2011-03-16

申请号：EP03747183

申请日：2003-04-23

申请人： NOKIA CORP

发明人： LAINEMA JANI

IPC分类号： H04N7/30 ,  G06T9/00 ,  H03M7/36 ,  H04N5/00 ,  H04N7/26 ,  H04N7/32 ,  H04N7/50 ,  G06K9/36 ,  H04B1/66

CPC分类号： H04N19/463 ,  H04N19/126 ,  H04N19/136 ,  H04N19/174 ,  H04N19/196 ,  H04N19/61 ,  H04N19/70

摘要： A method and device for coding of digital video sequence, wherein an indication of quantization parameter (QP) is provided in the encoded bit-stream for decoding purposes. The QP related information is indicated by introducing a sequence level quantization parameter value SQP. More specifically, instead of coding the absolute values of picture/slice QPs, an indication of the difference DeltaQP between the sequence level quantization parameter SQP and the picture/slice QP is provided. This eliminates the need to transmit a full QP for every picture/slice, and enables a statistically smaller difference value to be transmitted, thus providing a reduction in transmission bit-rate. The difference value is subsequently used in a corresponding decoder to reconstruct the picture/slice QP.

公开(公告)号：EP1500269A4

公开(公告)日：2007-09-19

申请号：EP03747184

申请日：2003-04-25

申请人： NOKIA CORP

发明人： LAINEMA JANI

IPC分类号： H04N7/32 ,  G06T9/00 ,  H03M7/36 ,  H03M7/40 ,  H04N1/00 ,  H04N7/26 ,  H04N7/50 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC分类号： H03M7/40 ,  H04N19/61 ,  H04N19/91

摘要： A method and system for entropy coding, where parameters indicative of a coded signal (20) are mapped into codeword indexes (128) so that a decoder (50) can reconstruct the coded signal from the codeword indexes (128). When the parameter space is limited such that the coding is inefficient in that the codewords are not arranged in an orderly or contiguous fashion corresponding to the parameters, a sorting step is used to sort the parameters into different groups so that parameters in different groups are mapped into the codeword indexes in different manners such that the codeword indexes corresponding to the parameters are assigned in a contiguous and orderly manner. The sorting can be based on the absolute values of the parameters in relation with a selected value. In the decoding process, the codewords indexes are also sorted into different groups based on the value of codewords indexex in relation to the selected value.

公开(公告)号：EP1466477A4

公开(公告)日：2006-10-25

申请号：EP03729301

申请日：2003-01-14

申请人： NOKIA CORP

发明人： LAINEMA JANI

IPC分类号： G06K9/36 ,  G06T9/00 ,  H03M7/36 ,  H04N19/50 ,  H04N19/80 ,  H04N19/89

CPC分类号： H04N19/523 ,  H04N19/117 ,  H04N19/136 ,  H04N19/172 ,  H04N19/176 ,  H04N19/196 ,  H04N19/197 ,  H04N19/46 ,  H04N19/463 ,  H04N19/61 ,  H04N19/80 ,  H04N19/89

摘要： A video coding system for coding a video sequence comprising a sequence of video frames each having an array of pixel values, wherein an interpolation filter is defined in order to reconstruct the pixel values in the decoding process. The system codes coefficients of an interpolation filter differentially with respect to a predefined base filter in order to provide a set of difference values. As the base filter coefficients are known to both encoder and decoder and can be statistically reasonably close to the actual filters used in the video sequence, the decoder can reconstruct the pixel values based on the set of difference values.

公开(公告)号：EP2522145A4

公开(公告)日：2014-08-06

申请号：EP11731722

申请日：2011-01-07

申请人： NOKIA CORP

发明人： LAINEMA JANI ,  UGUR KEMAL

IPC分类号： H04N19/117 ,  H04N19/14 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61 ,  H04N19/82 ,  H04N19/86

CPC分类号： H04N19/00781 ,  H04N19/117 ,  H04N19/14 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61 ,  H04N19/82 ,  H04N19/86

摘要： There is disclosed apparatuses, methods and computer program products for coding and decoding and specifically but not only for coding and decoding of image and video signals. It is determined whether two adjacent blocks of pixels of an image have a flat nature. The result of the determining is used to select a filter among at least a first filter and a second filter for filtering a block boundary between two adjacent blocks of pixels. The second filter is selected when said determining indicates that there are two adjacent blocks of pixels having a flat nature. At least a first reference value and a second reference value are selected for the second filter and used in filtering the block boundary.

公开(公告)号：EP2371066A4

公开(公告)日：2014-06-04

申请号：EP09830057

申请日：2009-11-23

申请人： NOKIA CORP

发明人： HALLAPURO ANTTI ,  LAINEMA JANI ,  UGUR KEMAL

IPC分类号： H03M7/46 ,  G06T9/00 ,  H03M7/30 ,  H03M7/48 ,  H04N19/00 ,  H04N19/13 ,  H04N19/14 ,  H04N19/61 ,  H04N19/91

CPC分类号： H03M7/6094 ,  H03M7/48 ,  H04N19/13 ,  H04N19/14 ,  H04N19/18 ,  H04N19/61

公开(公告)号：EP2522144A4

公开(公告)日：2014-03-19

申请号：EP11731721

申请日：2011-01-07

申请人： NOKIA CORP

发明人： LAINEMA JANI ,  UGUR KEMAL

IPC分类号： H04N19/80 ,  H04N19/103 ,  H04N19/122 ,  H04N19/14 ,  H04N19/147 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/46 ,  H04N19/59 ,  H04N19/61 ,  H04N19/86

CPC分类号： H04N7/32 ,  H04N19/00 ,  H04N19/103 ,  H04N19/122 ,  H04N19/14 ,  H04N19/147 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/46 ,  H04N19/50 ,  H04N19/59 ,  H04N19/61 ,  H04N19/80 ,  H04N19/86

摘要： An apparatus, a method and a computer program product for video coding are provided including selecting an encoding method from a set of encoding methods comprising at least a first encoding method and a second encoding method for encoding a block of pixels of an image; selecting at least one control point among the pixels of the block of pixels, wherein the control pixel is selected from any pixel of the block of pixels; and selecting a first reference point different from the control point; determining values of the other pixels of the selected block of pixels on the basis of the value of the control point and the value of the at least one reference point.

摘要翻译： 提供一种用于视频编码的装置，方法和计算机程序产品，包括从包括至少第一编码方法和第二编码方法的编码方法集合中选择编码方法，用于对图像的像素块进行编码; 在所述像素块的像素中选择至少一个控制点，其中所述控制像素从所述像素块的任何像素中选择; 以及选择与所述控制点不同的第一参考点; 基于所述控制点的值和所述至少一个参考点的值来确定所选择的像素块的其他像素的值。