Patents by Inventor Elena Alshina

Elena Alshina has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Video encoding method and video encoding apparatus and video decoding method and video decoding apparatus for signaling SAO parameters
    Patent number: 9787992
    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.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: October 10, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Alexander Alshin, Jeong-hoon Park
  • VIDEO ENCODING METHOD AND APPARATUS, OR VIDEO DECODING METHOD AND APPARATUS THAT PERFORM INTRA PREDICTION BASED ON ONE OR MORE SAMPLE VALUES AND ONE OR MORE PATTERNS THAT ARE DETERMINED WITH RESPECT TO BLOCK
    Publication number: 20170244974
    Abstract: Provided is an image encoding method including determining at least one sample value related to a first block, based on sample values of previously-reconstructed reference samples; determining at least one pattern in which samples of the first block are to be arranged; generating one or more candidate prediction blocks for the first block, based on the at least one sample value and the at least one pattern; and determining prediction values of the samples of the first block, based on one of the one or more candidate prediction blocks.
    Type: Application
    Filed: May 5, 2017
    Publication date: August 24, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-hye MIN, Elena ALSHINA, Mikhail MISHUROVSKIY, Yin-ji PIAO
  • Method and apparatus for encoding video by compensating for pixel value according to pixel groups, and method and apparatus for decoding video by the same
    Patent number: 9736499
    Abstract: Provided are a method and apparatus of encoding a video by compensating for a pixel value and a method and apparatus of decoding a video by compensating for a pixel value. The method of encoding the video includes: encoding image data; decoding the encoded image data and generating a restored image by performing loop filtering on the decoded image data; determining a compensation value corresponding to errors between a predetermined group restored pixels in the restored image and corresponding original pixels, and a pixel group including a restored pixel to be compensated for by using the compensation value; and encoding the compensation value and transmitting the encoded compensation value and a bitstream of the encoded image data.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: August 15, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Alexander Alshin, Elena Alshina, Nikolay Shlyakhov
  • DETERMINING INTRA PREDICTION MODE OF IMAGE CODING UNIT AND IMAGE DECODING UNIT
    Publication number: 20170223364
    Abstract: A method for decoding an image including performing intra prediction on a chrominance block according to whether the intra prediction mode of the chrominance block is equal to an intra prediction mode of a luminance block.
    Type: Application
    Filed: April 13, 2017
    Publication date: August 3, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-hye MIN, Elena ALSHINA, Woo-jin HAN
  • Video encoding method and video encoding apparatus and video decoding method and video decoding apparatus, which perform deblocking filtering based on tree-structure encoding units
    Patent number: 9712822
    Abstract: A method of encoding a video is provided, the method includes: determining a filtering boundary on which deblocking filtering is to be performed based on at least one data unit from among a plurality of coding units that are hierarchically configured according to depths indicating a number of times at least one maximum coding unit is spatially spilt, and a plurality of prediction units and a plurality of transformation units respectively for prediction and transformation of the plurality of coding units, determining filtering strength at the filtering boundary based on a prediction mode of a coding unit to which pixels adjacent to the filtering belong from among the plurality of coding units, and transformation coefficient values of the pixels adjacent to the filtering boundary, and performing deblocking filtering on the filtering boundary based on the determined filtering strength.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: July 18, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo-jin Han, Elena Alshina, Jung-hye Min, Alexander Alshin, Il-koo Kim, Nikolay Shlyakhov, Tammy Lee, Sun-il Lee, Min-su Cheon, Jianle Chen, Vadim Seregin, Yoon-mi Hong
  • Determining intra prediction mode of image coding unit and image decoding unit
    Patent number: 9667974
    Abstract: A method for decoding an image including performing intra prediction on a chrominance block according to whether the intra prediction mode of the chrominance block is equal to an intra prediction mode of a luminance block.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: May 30, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-hye Min, Elena Alshina, Woo-jin Han
  • Method and apparatus for entropy encoding/decoding
    Patent number: 9661326
    Abstract: Provided are methods and apparatuses for entropy-encoding and entropy-decoding an image. The method for entropy-encoding an image includes operations of arithmetically encoding a binary value of a current coding symbol, by using a probability of a predefined binary value which is determined based on previously-coded symbols that are encoded before the current coding symbol; and updating the probability of the predefined binary value by using a plurality of scaling factors, according to the binary value of the current coding symbol.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: May 23, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Alexander Alshin, Elena Alshina
  • VIDEO ENCODING METHOD WITH BIT DEPTH ADJUSTMENT FOR FIXED-POINT CONVERSION AND APPARATUS THEREFOR, AND VIDEO DECODING METHOD AND APPARATUS THEREFOR
    Publication number: 20170104996
    Abstract: Provided are a video encoding method of adjusting a range of encoded output data to adjust a bit depth during restoring of encoded samples, and a video decoding method of substantially preventing overflow from occurring in output data in operations of a decoding process. The video decoding method includes parsing and restoring quantized transformation coefficients in units of blocks of an image from a received bitstream, restoring transformation coefficients by performing inverse quantization on the quantized transformation coefficients, and restoring samples by performing one-dimensional (1D) inverse transformation and inverse scaling on the quantized transformation coefficients. At least one from among the transformation coefficients and the samples has a predetermined bit depth or less.
    Type: Application
    Filed: December 21, 2016
    Publication date: April 13, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena ALSHINA, Alexander ALSHIN
  • METHOD AND APPARATUS FOR ENCODING VIDEO SIGNAL AND METHOD AND APPARATUS FOR DECODING VIDEO SIGNAL
    Publication number: 20170064315
    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.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena ALSHINA, Yoon-mi HONG, Woo-jin HAN
  • METHOD AND APPARATUS FOR ENCODING VIDEO SIGNAL AND METHOD AND APPARATUS FOR DECODING VIDEO SIGNAL
    Publication number: 20170064316
    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.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena ALSHINA, Yoon-mi HONG, Woo-jin HAN
  • METHOD AND APPARATUS FOR ENCODING VIDEO SIGNAL AND METHOD AND APPARATUS FOR DECODING VIDEO SIGNAL
    Publication number: 20170064314
    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.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena ALSHINA, Yoon-mi HONG, Woo-jin HAN
  • METHOD AND APPARATUS FOR ENCODING VIDEO SIGNAL AND METHOD AND APPARATUS FOR DECODING VIDEO SIGNAL
    Publication number: 20170064317
    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.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena ALSHINA, Yoon-mi HONG, Woo-jin HAN
  • Method and device for encoding and decoding video
    Patent number: 9578332
    Abstract: A method and apparatus for encoding and decoding a video are provided. The method of encoding the video includes: determining whether a unidirectional motion estimation mode and a bidirectional motion estimation mode are to be used based on a size of a current prediction unit to be encoded, performing the motion estimation and the motion compensation on the current prediction unit according to the determining of whether the unidirectional motion estimation mode and the bidirectional motion estimation mode are to be used, determining an optimum motion estimation mode of the current prediction unit based on an encoding cost of the current prediction unit obtained through the performing of the motion estimation and the motion compensation, and encoding information indicating the determined optimum motion estimation mode based on the size of the current prediction unit.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: February 21, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Jianle Chen, Woo-jin Han
  • Video encoding method using offset adjustment according to classification of pixels by maximum encoding units and apparatus thereof, and video decoding method and apparatus thereof
    Patent number: 9571843
    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.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: February 14, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Alexander Alshin
  • Video encoding method with bit depth adjustment for fixed-point conversion and apparatus therefor, and video decoding method and apparatus therefor
    Patent number: 9549202
    Abstract: Provided are a video encoding method of adjusting a range of encoded output data to adjust a bit depth during restoring of encoded samples, and a video decoding method of substantially preventing overflow from occurring in output data in operations of a decoding process. The video decoding method includes parsing and restoring quantized transformation coefficients in units of blocks of an image from a received bitstream, restoring transformation coefficients by performing inverse quantization on the quantized transformation coefficients, and restoring samples by performing one-dimensional (1D) inverse transformation and inverse scaling on the quantized transformation coefficients. At least one from among the transformation coefficients and the samples has a predetermined bit depth or less.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: January 17, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Alexander Alshin
  • Method and apparatus for performing interpolation based on transform and inverse transform
    Patent number: 9547886
    Abstract: Provided are a method and apparatus for interpolating an image. The method includes: selecting a first filter, from among a plurality of different filters, for interpolating between pixel values of integer pixel units, according to an interpolation location; and generating at least one pixel value of at least one fractional pixel unit by interpolating between the pixel values of the integer pixel units by using the selected first filter.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: January 17, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Alexander Alshin, Nikolay Shlyakhov, Byeong-doo Choi, Yoon-mi Hong, Woo-jin Han, Tammy Lee
  • Method and device for encoding and decoding video
    Patent number: 9544600
    Abstract: A method and apparatus for encoding and decoding a video are provided. The method of encoding the video includes: determining whether a unidirectional motion estimation mode and a bidirectional motion estimation mode are to be used based on a size of a current prediction unit to be encoded, performing the motion estimation and the motion compensation on the current prediction unit according to the determining of whether the unidirectional motion estimation mode and the bidirectional motion estimation mode are to be used, determining an optimum motion estimation mode of the current prediction unit based on an encoding cost of the current prediction unit obtained through the performing of the motion estimation and the motion compensation, and encoding information indicating the determined optimum motion estimation mode based on the size of the current prediction unit.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: January 10, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Jianle Chen, Woo-jin Han
  • Video encoding method using offset adjustment according to classification of pixels by maximum encoding units and apparatus thereof, and video decoding method and apparatus thereof
    Patent number: 9544606
    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.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: January 10, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Alexander Alshin
  • IMAGE ENCODING METHOD FOR SAMPLE VALUE COMPENSATION AND APPARATUS THEREFOR, AND IMAGE DECODING METHOD FOR SAMPLE VALUE COMPENSATION AND APPARATUS THEREFOR
    Publication number: 20170006289
    Abstract: Provided are a video encoding method and apparatus and a video decoding method and apparatus for generating a reconstructed image having a minimized error between an original image and the reconstructed image. The video decoding method includes: parsing, from a bitstream, a scale parameter for scaling an offset of a current block; scaling an offset absolute value of the current block by using the scale parameter; determining an offset of the current block by using the scaled offset absolute value; and compensating for a sample value of a reconstructed pixel of the current block by using the offset of the current block.
    Type: Application
    Filed: March 16, 2015
    Publication date: January 5, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena ALSHINA, Alexander ALSHIN
  • Method and device for encoding and decoding video
    Patent number: 9538187
    Abstract: A method and apparatus for encoding and decoding a video are provided. The method of encoding the video includes: determining whether a unidirectional motion estimation mode and a bidirectional motion estimation mode are to be used based on a size of a current prediction unit to be encoded, performing the motion estimation and the motion compensation on the current prediction unit according to the determining of whether the unidirectional motion estimation mode and the bidirectional motion estimation mode are to be used, determining an optimum motion estimation mode of the current prediction unit based on an encoding cost of the current prediction unit obtained through the performing of the motion estimation and the motion compensation, and encoding information indicating the determined optimum motion estimation mode based on the size of the current prediction unit.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: January 3, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Elena Alshina, Jianle Chen, Woo-jin Han