Patents by Inventor Woo Shik Kim

Woo Shik Kim 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).

  • Method and Apparatus for Sample Adaptive Offset Parameter Estimation in Video Coding
    Publication number: 20160337641
    Abstract: A method for sample adaptive offset (SAO) filtering in a video encoder is provided that includes estimating SAO parameters for color components of a largest coding unit (LCU) of a picture, wherein estimating SAO parameters includes using at least some non-deblock-filtered reconstructed pixels of the LCU to estimate the SAO parameters, performing SAO filtering on the reconstructed LCU according to the estimated SAO parameters, and entropy encoding SAO information for the LCU in a compressed video bit stream, wherein the SAO information signals the estimated SAO parameters for the LCU.
    Type: Application
    Filed: March 4, 2013
    Publication date: November 17, 2016
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Woo-Shik Kim, Madhukar Budagavi, Minhua Zhou
  • Method, medium, and apparatus encoding and/or decoding an image using the same coding mode across components
    Patent number: 9497474
    Abstract: A method, medium, and apparatus encoding and/or decoding an image in order to increase encoding and decoding efficiency by performing binary-arithmetic coding/decoding on a binary value of a syntax element using a probability model having the same syntax element probability value for respective context index information of each of at least two image components.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: November 15, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-sung Cho, Hyun-mun Kim, Woo-shik Kim, Dmitri Birinov
  • High precision explicit weighted prediction for video coding
    Patent number: 9497473
    Abstract: In one example, a device for coding video data includes a memory configured to store video data, and a video coder configured to code a value for a syntax element representative of whether a high bit depth is enabled for the video data, and when the value for the syntax element indicates that the high bit depth is enabled: code a value for a syntax element representative of the high bit depth for one or more parameters of the video data, code values for the parameters such that the values for the parameters are representative of bit depths that are based on the value for the syntax element representative of the high bit depth, and code the video data based at least in part on the values for the parameters.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: November 15, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Wei Pu, Jianle Chen, Marta Karczewicz, Woo-Shik Kim, Joel Sole Rojals
  • Sample Adaptive Offset (SAO) Parameter Signaling
    Publication number: 20160309195
    Abstract: Techniques for signaling of sample adaptive offset (SAO) information that may reduce the coding rate for signaling such information in the compressed bit stream are provided. More specifically, techniques are provided that allow SAO information common to two or more of the color components to be signaled using one or more syntax elements (flags or indicators) representative of the common information. These techniques reduce the need to signal SAO information separately for each color component.
    Type: Application
    Filed: June 24, 2016
    Publication date: October 20, 2016
    Inventors: Woo-Shik Kim, Do-Kyoung Kwon, Minhua Zhou
  • Disabling intra prediction filtering
    Patent number: 9451254
    Abstract: A video decoder may adaptively disable, based on a syntax element, one or more filters used for intra-prediction. In addition, the video decoder may perform intra-prediction to generate prediction data for a current block of a current video slice. Furthermore, a video encoder may adaptively disable one or more filters used for intra-prediction. Furthermore, the video encoder may signal a syntax element that controls the one or more filters. In addition, the video encoder may perform intra prediction to generate prediction data for a current video block the video data.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: September 20, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Rajan Laxman Joshi, Joel Sole Rojals, Marta Karczewicz, Jewon Kang, Woo-Shik Kim
  • FAST VIDEO ENCODING METHOD WITH BLOCK PARTITIONING
    Publication number: 20160261870
    Abstract: A video encoding device comprises a memory configured to store video data and at least one processor configured to: select one of a full rate-distortion (RD) checking scheme or a fast RD checking scheme, determine an RD cost associated with encoding a block of the video data based on the selected full RD checking scheme or fast RD checking scheme, determine a partitioning scheme for the block based on the determined RD cost, and encode the block using the determined partitioning scheme based on the determined RD cost.
    Type: Application
    Filed: June 11, 2015
    Publication date: September 8, 2016
    Inventors: Chengjie Tu, Wei-Jung Chien, Xianglin Wang, Jaehong Chon, In Suk Chong, Marta Karczewicz, Woo-Shik Kim, Xin Zhao
  • ADAPTIVE MODE CHECKING ORDER FOR VIDEO ENCODING
    Publication number: 20160261861
    Abstract: A video encoding device comprises a memory configured and at least one processor configured to: determine whether a metric meets a condition based on statistics, wherein the statistics are associated with a first video encoding mode checking order and a second video encoding mode checking order, responsive to determining that the metric meets the condition, select a first encoding mode checking order to encode the first block of video data responsive to determining that the condition is not met, select a second encoding mode checking order different from the first encoding mode checking order to encode the first block of video data, update the statistics based on the selected first or second encoding mode checking order, and encode a second block of video data, based on the updated statistics, and using the first or second mode checking order.
    Type: Application
    Filed: June 11, 2015
    Publication date: September 8, 2016
    Inventors: Chengjie Tu, Wei-Jung Chien, Xianglin Wang, Jaehong Chon, In Suk Chong, Marta Karczewicz, Woo-Shik Kim, Xin Zhao
  • Image coding and decoding method and apparatus considering human visual characteristics
    Patent number: 9414075
    Abstract: An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest to a background region, (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, (c) quantizing image data in accordance with the quantization parameter, and (d) coding entropy of the quantized image data.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: August 9, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo-shik Kim, Dae-sung Cho, Shi-hwa Lee, Sang-wook Kim
  • Sample adaptive offset (SAO) parameter signaling
    Patent number: 9380302
    Abstract: Techniques for signaling of sample adaptive offset (SAO) information that may reduce the coding rate for signaling such information in the compressed bit stream are provided. More specifically, techniques are provided that allow SAO information common to two or more of the color components to be signaled using one or more syntax elements (flags or indicators) representative of the common information. These techniques reduce the need to signal SAO information separately for each color component.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: June 28, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Woo-Shik Kim, Do-Kyoung Kwon, Minhua Zhou
  • Method and apparatus for encoding and decoding image
    Patent number: 9369733
    Abstract: An apparatus and method for encoding and decoding an image are provided. The image decoding method includes decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: June 14, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-Sung Cho, Woo-Shik Kim, Dmitri Birinov, Hyun-Mun Kim
  • METHOD AND APPARATUS FOR SAMPLE ADAPTIVE OFFSET WITHOUT SIGN CODING
    Publication number: 20160150251
    Abstract: A method and apparatus for sample adaptive offset without sign coding. The method includes selecting an edge offset type for at least a portion of an image, classifying at least one pixel of at least the portion of the image into edge shape category, calculating an offset of the pixel, determining the offset is larger or smaller than a predetermined threshold, changing a sign of the offset based on the threshold determination; and performing entropy coding accounting for the sign of the offset and the value of the offset.
    Type: Application
    Filed: January 28, 2016
    Publication date: May 26, 2016
    Inventors: Woo-Shik Kim, Do-Kyoung Kwon
  • IMAGE CODING METHOD AND APPARATUS USING SPATIAL PREDICTIVE CODING OF CHROMINANCE AND IMAGE DECODING METHOD AND APPARATUS
    Publication number: 20160142734
    Abstract: A coding method including dividing pixels of a chrominance component of an input image into blocks having a predetermined size; selecting one among a direct current prediction method, a vertical prediction method, a horizontal prediction method, and a hybrid prediction method according to a user's input; generating a prediction value of each pixel in a current block to be predictively coded, using at least one pixel value among pixel values in an upper reference block adjacent to the current block and in a side reference block adjacent to the current block, according to the selected prediction method; generating a differential value between the prediction value and a corresponding real pixel value in the current block; and coding the differential value and information on the selected prediction method using a predetermined coding method.
    Type: Application
    Filed: January 21, 2016
    Publication date: May 19, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo-shik KIM, Chang-yeong KIM, Yang-seock SEO
  • Image coding method and apparatus using spatial predictive coding of chrominance and image decoding method and apparatus
    Patent number: 9282341
    Abstract: A coding method including dividing pixels of a chrominance component of an input image into blocks having a predetermined size; selecting one among a direct current prediction method, a vertical prediction method, a horizontal prediction method, and a hybrid prediction method according to a user's input; generating a prediction value of each pixel in a current block to be predictively coded, using at least one pixel value among pixel values in an upper reference block adjacent to the current block and in a side reference block adjacent to the current block, according to the selected prediction method; generating a differential value between the prediction value and a corresponding real pixel value in the current block; and coding the differential value and information on the selected prediction method using a predetermined coding method.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: March 8, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo-shik Kim, Chang-yeong Kim, Yang-seock Seo
  • Method and apparatus for image and video coding using hierarchical sample adaptive band offset
    Patent number: 9277194
    Abstract: A method and apparatus for image coding using hierarchical sample adaptive band offset. The method includes decoding a signal of a portion of an image, determining a band offset type and offset of a portion of the image, utilizing the band offset type and offset to determine a sub-band, and reconstructing a pixel value according to the determined offset value.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: March 1, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Woo-Shik Kim, Do-Kyoung Kwon
  • Method and apparatus for sample adaptive offset without sign coding
    Patent number: 9253482
    Abstract: A method and apparatus for sample adaptive offset without sign coding. The method includes selecting an edge offset type for at least a portion of an image, classifying at least one pixel of at least the portion of the image into edge shape category, calculating an offset of the pixel, determining the offset is larger or smaller than a predetermined threshold, changing a sign of the offset based on the threshold determination; and performing entropy coding accounting for the sign of the offset and the value of the offset.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: February 2, 2016
    Assignee: TEXAS INSTURMENTS INCORPORATED
    Inventors: Woo-Shik Kim, Do-Kyoung Kwon
  • IMAGE CODING AND DECODING METHOD AND APPARATUS CONSIDERING HUMAN VISUAL CHARACTERISTICS
    Publication number: 20160021372
    Abstract: An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest to a background region, (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, (c) quantizing image data in accordance with the quantization parameter, and (d) coding entropy of the quantized image data.
    Type: Application
    Filed: June 17, 2015
    Publication date: January 21, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo-shik KIM, Dae-sung Cho, Shi-hwa Lee, Sang-wook Kim
  • METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE
    Publication number: 20150350675
    Abstract: An apparatus and method for encoding and decoding an image are provided. The image decoding method includes decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks.
    Type: Application
    Filed: August 12, 2015
    Publication date: December 3, 2015
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dae-Sung CHO, Woo-Shik Kim, Dmitri Birinov, Hyun-Mun Kim
  • IMAGE CODING AND DECODING METHOD AND APPARATUS CONSIDERING HUMAN VISUAL CHARACTERISTICS
    Publication number: 20150288967
    Abstract: An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest to a background region, (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, (c) quantizing image data in accordance with the quantization parameter, and (d) coding entropy of the quantized image data.
    Type: Application
    Filed: June 17, 2015
    Publication date: October 8, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo-shik KIM, Dae-sung Cho, Shi-hwa Lee, Sang-wook Kim
  • IMAGE CODING AND DECODING METHOD AND APPARATUS CONSIDERING HUMAN VISUAL CHARACTERISTICS
    Publication number: 20150288966
    Abstract: An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest to a background region, (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, (c) quantizing image data in accordance with the quantization parameter, and (d) coding entropy of the quantized image data.
    Type: Application
    Filed: June 17, 2015
    Publication date: October 8, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo-shik KIM, Dae-sung CHO, Shi-hwa LEE, Sang-wook KIM
  • IMAGE CODING AND DECODING METHOD AND APPARATUS CONSIDERING HUMAN VISUAL CHARACTERISTICS
    Publication number: 20150281694
    Abstract: An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest to a background region, (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, (c) quantizing image data in accordance with the quantization parameter, and (d) coding entropy of the quantized image data.
    Type: Application
    Filed: June 17, 2015
    Publication date: October 1, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo-shik KIM, Dae-sung Cho, Shi-hwa Lee, Sang-wook Kim