公开(公告)号：US20180014020A1

公开(公告)日：2018-01-11

申请号：US15700979

申请日：2017-09-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN ,  Jeong-hoon PARK

IPC: H04N19/14 ,  H04N19/463 ,  H04N19/103 ,  H04N19/186 ,  H04N19/13 ,  H04N19/91 ,  H04N19/82 ,  H04N19/86

CPC classification number: H04N19/14 ,  H04N19/103 ,  H04N19/13 ,  H04N19/186 ,  H04N19/463 ,  H04N19/82 ,  H04N19/86 ,  H04N19/91

Abstract: The present disclosure relates to signaling of sample adaptive offset (SAO) parameters determined to minimize an error between an original image and a reconstructed image in video encoding and decoding operations. An SAO decoding method includes obtaining context-encoded leftward SAO merge information and context-encoded upward SAO merge information from a bitstream of a largest coding unit (MCU); obtaining SAO on/off information context-encoded with respect to each color component, from the bitstream; if the SAO on/off information indicates to perform SAO operation, obtaining absolute offset value information for each SAO category bypass-encoded with respect to each color component, from the bitstream; and obtaining one of band position information and edge class information bypass-encoded with respect to each color component, from the bitstream.

公开(公告)号：US20170064317A1

公开(公告)日：2017-03-02

申请号：US15352312

申请日：2016-11-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Yoon-mi HONG ,  Woo-jin HAN

IPC: H04N19/36 ,  H04N19/124 ,  H04N19/63 ,  H04N19/159 ,  H04N19/625 ,  H04N19/61 ,  H04N19/13

CPC classification number: H04N19/36 ,  H04N19/124 ,  H04N19/13 ,  H04N19/159 ,  H04N19/174 ,  H04N19/184 ,  H04N19/40 ,  H04N19/42 ,  H04N19/61 ,  H04N19/625 ,  H04N19/63 ,  H04N19/98

Abstract: Provided are a method and apparatus for encoding a video signal and a method and apparatus for decoding a video signal. The method of encoding the video signal includes: determining an optimum scaling bit depth of the video signal in consideration of a maximum bit number of an intermediate value obtained during transformation of the video signal and a maximum bit precision of the video signal; scaling the video signal according to a local shift value corresponding to a difference between the determined optimum scaling bit depth and an original bit depth of the video signal; and transforming the scaled video signal.

公开(公告)号：US20170064315A1

公开(公告)日：2017-03-02

申请号：US15352203

申请日：2016-11-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Yoon-mi HONG ,  Woo-jin HAN

IPC: H04N19/36 ,  H04N19/124 ,  H04N19/63 ,  H04N19/159 ,  H04N19/625 ,  H04N19/61 ,  H04N19/13

CPC classification number: H04N19/36 ,  H04N19/124 ,  H04N19/13 ,  H04N19/159 ,  H04N19/174 ,  H04N19/184 ,  H04N19/40 ,  H04N19/42 ,  H04N19/61 ,  H04N19/625 ,  H04N19/63 ,  H04N19/98

Abstract: Provided are a method and apparatus for encoding a video signal and a method and apparatus for decoding a video signal. The method of encoding the video signal includes: determining an optimum scaling bit depth of the video signal in consideration of a maximum bit number of an intermediate value obtained during transformation of the video signal and a maximum bit precision of the video signal; scaling the video signal according to a local shift value corresponding to a difference between the determined optimum scaling bit depth and an original bit depth of the video signal; and transforming the scaled video signal.

Abstract translation: 提供了一种用于对视频信号进行编码的方法和装置以及用于对视频信号进行解码的方法和装置。 视频信号的编码方法包括：考虑在视频信号的变换期间获得的中间值的最大位数和视频信号的最大位精度，确定视频信号的最佳缩放比特深度; 根据与确定的最佳缩放比特深度和视频信号的原始比特深度之间的差对应的本地移位值对视频信号进行缩放; 并转换缩放的视频信号。

公开(公告)号：US20160337651A1

公开(公告)日：2016-11-17

申请号：US15110439

申请日：2015-01-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA

IPC: H04N19/187 ,  H04N19/70 ,  H04N19/33 ,  H04N19/59 ,  H04N19/132 ,  H04N19/182

CPC classification number: H04N19/187 ,  H04N19/132 ,  H04N19/182 ,  H04N19/33 ,  H04N19/59 ,  H04N19/70

Abstract: Provided is a video decoding apparatus including an encoding information obtainer configured to obtain, from a bitstream, reference layer size information, reference layer offset information, current layer size information, and current layer offset information, a scale ratio determiner configured to determine a scale ratio indicating a difference between a size of a reference area and a size of an expanded reference area, according to the size of the reference area which is determined from the reference layer size information and the reference layer offset information and the size of the expanded reference area which is determined from the current layer size information and the current layer offset information, and an up-sampling unit configured to determine the expanded reference area by up-sampling the reference area according to the reference layer offset information, the current layer offset information, and the scale ratio.

Abstract translation: 提供了一种视频解码装置，包括：编码信息获取器，被配置为从比特流获得参考层大小信息，参考层偏移信息，当前层大小信息和当前层偏移信息;比例确定器，被配置为确定比例比 根据从参考层尺寸信息和参考层偏移信息确定的参考区域的尺寸以及扩展参考区域的尺寸，指示参考区域的尺寸和扩展参考区域的尺寸之间的差异 根据当前层大小信息和当前层偏移信息确定的上采样单元;以及上采样单元，被配置为通过根据参考层偏移信息对参考区域进行上采样来确定扩展参考区域，当前层偏移信息， 和比例。

公开(公告)号：US20160286213A1

公开(公告)日：2016-09-29

申请号：US15180649

申请日：2016-06-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sun-il LEE ,  Elena ALSHINA ,  Yin-ji PIAO

IPC: H04N19/117 ,  H04N19/184 ,  H04N19/463 ,  H04N19/44 ,  H04N19/176 ,  H04N19/182

Abstract: Provided is a video decoding method for signaling of sample adaptive offset (SAO) parameters, the video decoding method including obtaining, from a bitstream, position information of each of a plurality of bandgroups with respect to a current block comprised in a video; obtaining, from the bitstream, offsets with respect to bands comprised in each of the plurality of bandgroups; determining the plurality of bandgroups so as to compensate for a pixel sample value of the current block, based on the position information of each of the plurality of bandgroups; and compensating for a sample value of a reconstructed pixel comprised in the current block, by using the obtained offsets. In this regard, each of the plurality of determined bandgroups comprises at least one band.

Abstract translation: 提供了一种用于信号采样自适应偏移（SAO）参数的视频解码方法，所述视频解码方法包括从比特流获得相对于包含在视频中的当前块的多个频带组中的每一个的位置信息; 从所述比特流获得关于包括在所述多个频带组中的每一个中的频带的偏移量; 基于所述多个频带组中的每一个的位置信息，确定所述多个频带组以便补偿所述当前块的像素采样值; 以及通过使用所获得的偏移来补偿包括在当前块中的重构像素的采样值。 在这点上，多个确定的频带组中的每一个包括至少一个频带。

公开(公告)号：US20150237357A1

公开(公告)日：2015-08-20

申请号：US14632155

申请日：2015-02-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Alexander ALSHIN ,  Elena ALSHINA ,  Jianle CHEN ,  Woo-jin HAN ,  Nikolay SHLYAKHOV ,  Yoon-mi HONG

IPC: H04N19/43 ,  H04N19/523 ,  H04N19/186 ,  H04N19/82 ,  H04N19/117 ,  H04N19/182 ,  H04N19/59

CPC classification number: H04N19/86 ,  G06F17/17 ,  G06F17/175 ,  G06T3/4007 ,  G06T5/002 ,  H04N19/117 ,  H04N19/182 ,  H04N19/186 ,  H04N19/42 ,  H04N19/43 ,  H04N19/521 ,  H04N19/523 ,  H04N19/59 ,  H04N19/635 ,  H04N19/80 ,  H04N19/82

Abstract: Provided are a method of interpolating an image by determining interpolation filter coefficients, and an apparatus for performing the same. The method includes: differently selecting an interpolation filter, from among interpolation filters for generating at least one sub-pel-unit pixel value located between integer-pel-unit pixels, based on a sub-pel-unit interpolation location and a smoothness; and generating the at least one sub-pel-unit pixel value by interpolating, using the selected interpolation filter, pixel values of the integer-pel-unit pixels.

公开(公告)号：US20150189317A1

公开(公告)日：2015-07-02

申请号：US14644684

申请日：2015-03-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/523 ,  H04N19/82 ,  H04N19/52

CPC classification number: H04N19/523 ,  G06T3/4007 ,  H04N19/117 ,  H04N19/167 ,  H04N19/182 ,  H04N19/52 ,  H04N19/537 ,  H04N19/59 ,  H04N19/61 ,  H04N19/82

Abstract: A sub-pel-unit image interpolation method using a transformation-based interpolation filter includes, selecting, based on a sub-pel-unit interpolation location in a region supported by a plurality of interpolation filters for generating at least one sub-pel-unit pixel value located between integer-pel-unit pixels, one of a symmetric interpolation filter and an asymmetric interpolation filter from among the plurality of interpolation filters; and using the selected interpolation filter to generate the at least one sub-pel-unit pixel value by interpolating the integer-pel-unit pixels.

公开(公告)号：US20150189314A1

公开(公告)日：2015-07-02

申请号：US14643766

申请日：2015-03-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/523 ,  H04N19/537

CPC classification number: H04N19/523 ,  G06T3/4007 ,  H04N19/117 ,  H04N19/167 ,  H04N19/182 ,  H04N19/52 ,  H04N19/537 ,  H04N19/59 ,  H04N19/61 ,  H04N19/82

Abstract: A sub-pel-unit image interpolation method using a transformation-based interpolation filter includes, selecting, based on a sub-pel-unit interpolation location in a region supported by a plurality of interpolation filters for generating at least one sub-pel-unit pixel value located between integer-pel-unit pixels, one of a symmetric interpolation filter and an asymmetric interpolation filter from among the plurality of interpolation filters; and using the selected interpolation filter to generate the at least one sub-pel-unit pixel value by interpolating the integer-pel-unit pixels.

公开(公告)号：US20150189295A1

公开(公告)日：2015-07-02

申请号：US14656383

申请日：2015-03-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/65

CPC classification number: H04N19/176 ,  H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/182 ,  H04N19/186 ,  H04N19/463 ,  H04N19/65 ,  H04N19/82 ,  H04N19/96

Abstract: A video decoding method includes extracting offset mergence information of a current largest coding unit (LCU), the offset mergence information indicating whether to adopt a second offset parameter as a first offset parameter of the current LCU; reconstructing the first offset parameter of the current LCU based on the offset mergence information, the first offset parameter including an offset type, an offset value, and an offset class of the current LCU; determining whether the current LCU is an edge type or a band type, based on the offset type; determining an edge direction according to the edge type or a band range according to the band type, based on the offset class; determining a difference value between reconstructed pixels and original pixels included in the offset class, based on the offset value; and adjusting pixel values of reconstructed pixels based on the difference value.

公开(公告)号：US20150189287A1

公开(公告)日：2015-07-02

申请号：US14656354

申请日：2015-03-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/136 ,  H04N19/176

CPC classification number: H04N19/176 ,  H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/182 ,  H04N19/186 ,  H04N19/463 ,  H04N19/65 ,  H04N19/82 ,  H04N19/96

Abstract: A video decoding method includes extracting offset mergence information of a current largest coding unit (LCU), the offset mergence information indicating whether to adopt a second offset parameter as a first offset parameter of the current LCU; reconstructing the first offset parameter of the current LCU based on the offset mergence information, the first offset parameter including an offset type, an offset value, and an offset class of the current LCU; determining whether the current LCU is an edge type or a band type, based on the offset type; determining an edge direction according to the edge type or a band range according to the band type, based on the offset class; determining a difference value between reconstructed pixels and original pixels included in the offset class, based on the offset value; and adjusting pixel values of reconstructed pixels based on the difference value.