Patents by Inventor Do-Kyoung Kwon
Do-Kyoung Kwon 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).
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Publication number: 20240114175Abstract: 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: ApplicationFiled: December 15, 2023Publication date: April 4, 2024Inventors: Woo-Shik Kim, Do-Kyoung Kwon, Minhua Zhou
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Publication number: 20240080435Abstract: A method for automatic generation of calibration parameters for a surround view (SV) camera system is provided that includes capturing a video stream from each camera comprised in the SV camera system, wherein each video stream captures two calibration charts in a field of view of the camera generating the video stream; displaying the video streams in a calibration screen on a display device coupled to the SV camera system, wherein a bounding box is overlaid on each calibration chart, detecting feature points of the calibration charts, displaying the video streams in the calibration screen with the bounding box overlaid on each calibration chart and detected features points overlaid on respective calibration charts, computing calibration parameters based on the feature points and platform dependent parameters comprising data regarding size and placement of the calibration charts, and storing the calibration parameters in the SV camera system.Type: ApplicationFiled: November 6, 2023Publication date: March 7, 2024Inventors: Sujith Shivalingappa, Vikram Appia, Anand Yalgurdrao Kulkarni, Do-Kyoung Kwon
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Patent number: 11910006Abstract: A method for encoding video data is provided that includes determining whether or not a parent coding unit of a coding unit of the video data was predicted in intra-prediction block copy (IntraBC) mode and, when it is determined that the parent coding unit was not predicted in IntraBC mode: computing activity of the coding unit, determining an IntraBC coding cost of the coding unit by computing the IntraBC coding cost of the coding unit using a two dimensional (2D) search when the activity of the coding unit is not than an activity threshold, and computing the IntraBC coding cost of the coding unit using a one dimensional (1D) search when the activity of the coding unit is less than the activity threshold, using the IntraBC coding cost to select an encoding mode from one of a plurality of encoding modes, encoding the coding unit using the selected encoding mode.Type: GrantFiled: July 20, 2021Date of Patent: February 20, 2024Assignee: Texas Instruments IncorporatedInventors: Do-Kyoung Kwon, Madhukar Budagavi
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Patent number: 11863758Abstract: An embodiment includes a method and an encoder for SSIM-based bits allocation. The encoder includes a memory and a processor utilized for allocating bits based on SSIM, wherein the processor estimates the model parameter of SSIM-based distortion model for the current picture and determines allocates bits based on the SSIM estimation.Type: GrantFiled: September 29, 2021Date of Patent: January 2, 2024Assignee: Texas Instruments IncorporatedInventors: Do-Kyoung Kwon, Hyung-Joon Kim
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Patent number: 11856239Abstract: 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: GrantFiled: May 17, 2022Date of Patent: December 26, 2023Assignee: Texas Instruments IncorporatedInventors: Woo-Shik Kim, Do-Kyoung Kwon
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Patent number: 11849154Abstract: 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: GrantFiled: June 23, 2021Date of Patent: December 19, 2023Assignee: Texas Instruments IncorporatedInventors: Woo-Shik Kim, Do-Kyoung Kwon, Minhua Zhou
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Publication number: 20230403403Abstract: A method for encoding a video sequence in a scalable video encoder to generate a scalable bitstream is provided that includes encoding the video sequence in a first layer encoder of the scalable video encoder to generate a first sub-bitstream, encoding the video sequence in a second layer encoder of the scalable video encoder to generate a second sub-bitstream, wherein portions of the video sequence being encoded in the second layer encoder are predicted using reference portions of the video sequence encoded in the first layer encoder, combining the first sub-bitstream and the second sub-bitstream in the scalable bitstream, and signaling an indication of a highest temporal level of the first sub-bitstream comprising at least one of the reference portions in the scalable bitstream.Type: ApplicationFiled: August 25, 2023Publication date: December 14, 2023Inventors: Do-Kyoung Kwon, Madhukar Budagavi
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Patent number: 11838497Abstract: A method for automatic generation of calibration parameters for a surround view (SV) camera system is provided that includes capturing a video stream from each camera comprised in the SV camera system, wherein each video stream captures two calibration charts in a field of view of the camera generating the video stream; displaying the video streams in a calibration screen on a display device coupled to the SV camera system, wherein a bounding box is overlaid on each calibration chart, detecting feature points of the calibration charts, displaying the video streams in the calibration screen with the bounding box overlaid on each calibration chart and detected features points overlaid on respective calibration charts, computing calibration parameters based on the feature points and platform dependent parameters comprising data regarding size and placement of the calibration charts, and storing the calibration parameters in the SV camera system.Type: GrantFiled: December 10, 2020Date of Patent: December 5, 2023Assignee: Texas Instruments IncorporatedInventors: Sujith Shivalingappa, Vikram Appia, Anand Yalgurdrao Kulkarni, Do-Kyoung Kwon
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Patent number: 11831874Abstract: This disclosure describes techniques for performing semi-global matching (SGM) path cost compression. In some examples, the techniques may perform disparity-dependent sub-sampling of a set of SGM path costs where the sub-sampling ratio is determined based on a candidate disparity level. The sub-sampled SGM path costs may be stored in a memory. When retrieved from memory, the sub-sampled SGM path costs may be interpolated to reconstruct the other path costs not stored in the memory. The reconstructed path costs may be used for further SGM processing. In further examples, the techniques may perform disparity-dependent quantization on the SGM path costs or the sub-sampled SGM path costs, and store the quantized SGM path costs in memory. The techniques of this disclosure may reduce bandwidth as well as reduce the memory footprint needed to implement an SGM algorithm.Type: GrantFiled: December 1, 2021Date of Patent: November 28, 2023Assignee: Texas Instruments IncorporatedInventors: Do-Kyoung Kwon, Jing-Fei Ren, Darnell Moore
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Publication number: 20230345010Abstract: A method for encoding a multi-view frame in a video encoder is provided that includes computing a depth quality sensitivity measure for a multi-view coding block in the multi-view frame, computing a depth-based perceptual quantization scale for a 2D coding block of the multi-view coding block, wherein the depth-based perceptual quantization scale is based on the depth quality sensitive measure and a base quantization scale for the 2D frame including the 2D coding block, and encoding the 2D coding block using the depth-based perceptual quantization scale.Type: ApplicationFiled: June 30, 2023Publication date: October 26, 2023Inventors: Do-Kyoung Kwon, Madhukar Budagavi, Ming-Jun Chen
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Patent number: 11792414Abstract: 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: GrantFiled: August 31, 2020Date of Patent: October 17, 2023Assignee: Texas Instruments IncorporatedInventors: Woo-Shik Kim, Do-Kyoung Kwon
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Patent number: 11762071Abstract: A method for multi-sensor calibration includes imaging a calibration target with a first sensor using a first modality to obtain a first set of data and a second sensor using a second modality that is different from the first modality to obtain a second set of data. A border of the calibration target is identified based on the first set of data. A first centroid location of the calibration target is identified based on the border of the calibration target. A border of a pattern disposed on the calibration target is identified based on the second set of data. A second centroid location of the calibration target is identified based on the border of the pattern. Calibration data for the first sensor and the second sensor is generated based on the first centroid location and the second centroid location.Type: GrantFiled: November 20, 2019Date of Patent: September 19, 2023Assignee: Texas Instruments IncorporatedInventors: Muhammad Zubair Ikram, Do-Kyoung Kwon
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Patent number: 11743476Abstract: In examples, a method comprises receiving, by a decoder, a scalable bitstream including a plurality of layers of bitstreams The method comprises determining, by the decoder, a target layer of the plurality of layers of bitstreams to be decoded. The method also comprises demultiplexing, by the decoder, the plurality of layers of bitstreams from the scalable bitstream. The method further includes decoding, by the decoder, each of the plurality of layers of bitstreams that is at or below the target layer and associated with the target layer. The method also comprises outputting, by the decoder, a video based on each of the plurality of layers of bitstreams that is at or below the target layer and associated with the target layer.Type: GrantFiled: November 8, 2021Date of Patent: August 29, 2023Assignee: Texas Instruments IncorporatedInventors: Do-Kyoung Kwon, Madhukar Budagavi
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Publication number: 20230232025Abstract: A method for encoding a video sequence in a scalable video encoder to generate a scalable bitstream is provided that includes encoding the video sequence in a first layer encoder of the scalable video encoder to generate a first sub-bitstream, encoding the video sequence in a second layer encoder of the scalable video encoder to generate a second sub-bitstream, wherein portions of the video sequence being encoded in the second layer encoder are predicted using reference portions of the video sequence encoded in the first layer encoder, combining the first sub-bitstream and the second sub-bitstream to generate the scalable bitstream, and signaling in the scalable bitstream an indication of a maximum decoded picture buffer (DPB) size needed for decoding the second sub-bitstream and the first sub-bitstream when the second sub-bitstream is a target sub-bitstream for decoding.Type: ApplicationFiled: March 20, 2023Publication date: July 20, 2023Inventors: Do-Kyoung Kwon, Madhukar Budagavi
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Publication number: 20230217045Abstract: A method for sample adaptive offset (SAO) filtering and SAO parameter signaling in a video encoder is provided that includes determining SAO parameters for largest coding units (LCUs) of a reconstructed picture, wherein the SAO parameters include an indicator of an SAO filter type and a plurality of SAO offsets, applying SAO filtering to the reconstructed picture according to the SAO parameters, and entropy encoding LCU specific SAO information for each LCU of the reconstructed picture in an encoded video bit stream, wherein the entropy encoded LCU specific SAO information for the LCUs is interleaved with entropy encoded data for the LCUs in the encoded video bit stream. Determining SAO parameters may include determining the LCU specific SAO information to be entropy encoded for each LCU according to an SAO prediction protocol.Type: ApplicationFiled: March 13, 2023Publication date: July 6, 2023Inventors: Vivienne Sze, Madhukar Budagavi, Woo-Shik Kim, Do-Kyoung Kwon, Minhua Zhou
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Patent number: 11694341Abstract: A CNN operates on the disparity or motion outputs of a block matching hardware module, such as a DMPAC module, to produce refined disparity or motion streams which improve operations in images having ambiguous regions. As the block matching hardware module provides most of the processing, the CNN can be small and thus able to operate in real time, in contrast to CNNs which are performing all of the processing. In one example, the CNN operation is performed only if the block hardware module output confidence level is below a predetermined amount. The CNN can have a number of different configurations and still be sufficiently small to operate in real time on conventional platforms.Type: GrantFiled: December 23, 2019Date of Patent: July 4, 2023Assignee: Texas Instmments IncorporatedInventors: Jing Li, Do-Kyoung Kwon, Tarek Aziz Lahlou
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Patent number: 11695936Abstract: A method for encoding a multi-view frame in a video encoder is provided that includes computing a depth quality sensitivity measure for a multi-view coding block in the multi-view frame, computing a depth-based perceptual quantization scale for a 2D coding block of the multi-view coding block, wherein the depth-based perceptual quantization scale is based on the depth quality sensitive measure and a base quantization scale for the 2D frame including the 2D coding block, and encoding the 2D coding block using the depth-based perceptual quantization scale.Type: GrantFiled: April 29, 2021Date of Patent: July 4, 2023Assignee: Texas Instruments IncorporatedInventors: Do-Kyoung Kwon, Madhukar Budagavi, Ming-Jun Chen
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Publication number: 20230169781Abstract: Examples provide for computer executable instructions executable by a processor to configure the processor to determine an occupancy status of cells of a region of interest by, for a first cell of the region of interest, determining whether the first cell is free by setting a free space flag for the first cell to an asserted value and setting a free space tested flag for the first cell to an asserted value responsive to determining that the first cell and each of the surrounding cells in the programmed radius of the first cell are unoccupied, and setting a free space flag for a second cell to a de-asserted value and setting a free space tested flag for the second cell to an asserted value responsive to determining that the second cell is occupied, the second cell being among the surrounding cells in the programmed radius of the first cell.Type: ApplicationFiled: November 30, 2021Publication date: June 1, 2023Inventors: Gunawath Dilshan GODALIYADDA, Vijay Kumar POTHUKUCHI, Do-Kyoung KWON
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Patent number: 11611767Abstract: A method for encoding a video sequence in a scalable video encoder to generate a scalable bitstream is provided that includes encoding the video sequence in a first layer encoder of the scalable video encoder to generate a first sub-bitstream, encoding the video sequence in a second layer encoder of the scalable video encoder to generate a second sub-bitstream, wherein portions of the video sequence being encoded in the second layer encoder are predicted using reference portions of the video sequence encoded in the first layer encoder, combining the first sub-bitstream and the second sub-bitstream to generate the scalable bitstream, and signaling in the scalable bitstream an indication of a maximum decoded picture buffer (DPB) size needed for decoding the second sub-bitstream and the first sub-bitstream when the second sub-bitstream is a target sub-bitstream for decoding.Type: GrantFiled: July 20, 2021Date of Patent: March 21, 2023Assignee: Texas Instruments IncorporatedInventors: Do-Kyoung Kwon, Madhukar Budagavi
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Publication number: 20230085594Abstract: A method for decoding encoded blocks of pixels from an encoded video bit stream is provided that includes decoding a block vector corresponding to an encoded block of pixels from the encoded bit stream, verifying that the block vector indicates a block of reconstructed pixels in a search area including reconstructed pixels of a largest coding unit (LCU) including the encoded block of pixels and N left neighboring reconstructed LCUs of the LCU, and decoding the encoded block of pixels, wherein the block of reconstructed pixels is used as a predictor for the encoded block of pixels.Type: ApplicationFiled: November 17, 2022Publication date: March 16, 2023Inventors: Do-Kyoung Kwon, Madhukar Budagavi