公开(公告)号：US20200154146A1

公开(公告)日：2020-05-14

申请号：US16741611

申请日：2020-01-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivienne Sze ,  Madhukar Budagavi ,  Woo-Shik Kim ,  Do-Kyoung Kwon ,  Minhua Zhou

IPC: H04N19/86 ,  H04N19/91 ,  H04N19/80 ,  H04N19/82 ,  H04N19/463 ,  H04N19/117 ,  H04N19/70

Abstract: 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.

公开(公告)号：US10652574B2

公开(公告)日：2020-05-12

申请号：US16161428

申请日：2018-10-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Do-Kyoung Kwon ,  Madhukar Budagavi

IPC: H04N19/567

Abstract: A method for encoding video data is provided that includes determining whether a parent coding unit of a coding unit of the video data was predicted in intra-prediction block copy (IntraBC) mode and, when 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; and when the activity of the coding unit is less than the activity threshold, using the IntraBC coding cost to select an encoding mode, and encoding the coding unit using the selected encoding mode.

公开(公告)号：US10536722B2

公开(公告)日：2020-01-14

申请号：US16056215

申请日：2018-08-06

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivienne Sze ,  Madhukar Budagavi ,  Woo-Shik Kim ,  Do-Kyoung Kwon ,  Minhua Zhou

IPC: H04N19/00 ,  H04N19/86 ,  H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/82 ,  H04N19/80 ,  H04N19/91

Abstract: 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.

公开(公告)号：US10194159B2

公开(公告)日：2019-01-29

申请号：US15056193

申请日：2016-02-29

Applicant: Texas Instruments Incorporated

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

IPC: H04N19/30 ,  H04N19/463 ,  H04N19/82 ,  H04N19/00 ,  H04N19/182

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.

公开(公告)号：US10091513B2

公开(公告)日：2018-10-02

申请号：US13631841

申请日：2012-09-28

Applicant: Texas Instruments Incorporated

Inventor： Do-Kyoung Kwon ,  Madhukar Budagavi ,  Ming-Jun Chen

IPC: H04N19/00 ,  H04N19/154 ,  H04N19/597 ,  H04N19/176 ,  H04N19/124 ,  H04N19/142 ,  H04N13/00

Abstract: 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.

公开(公告)号：US10085030B2

公开(公告)日：2018-09-25

申请号：US15181210

申请日：2016-06-13

Applicant: Texas Instruments Incorporated

Inventor： Do-Kyoung Kwon ,  Hyung-Joon Kim

IPC: H04N19/154 ,  H04N19/172 ,  H04N19/115 ,  H04N19/194

CPC classification number: H04N19/154 ,  H04N19/115 ,  H04N19/172 ,  H04N19/194

Abstract: 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.

公开(公告)号：US10080007B2

公开(公告)日：2018-09-18

申请号：US15073078

申请日：2016-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jing-Fei Ren ,  Darnell Moore ,  Do-Kyoung Kwon

IPC: G06K9/00 ,  H04N13/128 ,  H04N13/00 ,  G06T7/00

CPC classification number: H04N13/128 ,  G06T7/593 ,  G06T7/85 ,  G06T2207/10012 ,  H04N13/239 ,  H04N2013/0081

Abstract: Apparatus and methods for disparity cost computation for a stereoscopic image. In an example, a method includes computing partial path matching costs for multiple disparities of pixels of multiple parallelogram blocks of an image in a forward pass direction. Between computing the partial path matching costs of the pixels of adjacent parallelogram blocks, the method includes computing partial path matching costs for the plurality of disparities of pixels along a boundary edge of a corresponding rectangular tile using paths that are external to the rectangular tile and computing partial path matching costs the disparities for all of the pixels of the corresponding rectangular tile. The method also includes computing total aggregated disparity costs for each disparity of the pixels of the image using the partial path matching costs computed for the pixels in the parallelogram blocks and in the rectangular tiles.

公开(公告)号：US20180184078A1

公开(公告)日：2018-06-28

申请号：US15393168

申请日：2016-12-28

Applicant: Texas Instruments Incorporated

Inventor： Sujith Shivalingappa ,  Vikram Appia ,  Anand Yalgurdrao Kulkarni ,  Do-Kyoung Kwon

IPC: H04N17/00 ,  H04N7/18 ,  G06K9/00 ,  B60R1/00

CPC classification number: H04N17/002 ,  B60R1/00 ,  B60R2300/102 ,  B60R2300/105 ,  B60R2300/402 ,  G06K9/00791 ,  G06K9/3216 ,  G06K2009/2045 ,  G06K2009/3225 ,  H04N7/181

Abstract: 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.

公开(公告)号：US20160309195A1

公开(公告)日：2016-10-20

申请号：US15192547

申请日：2016-06-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon ,  Minhua Zhou

IPC: H04N19/86 ,  H04N19/91 ,  H04N19/82 ,  H04N19/117 ,  H04N19/186

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/186 ,  H04N19/463 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  H04N19/91

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.

公开(公告)号：US20160227237A1

公开(公告)日：2016-08-04

申请号：US15012829

申请日：2016-02-01

Applicant: Texas Instruments Incorporated

Inventor： Do-Kyoung Kwon ,  Jing-Fei Ren ,  Darnell Moore

IPC: H04N19/423 ,  H04N19/124 ,  H04N13/00

CPC classification number: H04N19/124 ,  G06T7/593 ,  H04N13/161 ,  H04N19/137 ,  H04N19/182 ,  H04N2013/0081

Abstract: 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.

Abstract translation: 本公开描述了用于执行半全局匹配（SGM）路径成本压缩的技术。 在一些示例中，这些技术可以对基于候选视差水平确定子采样比的一组SGM路径成本执行与视差相关的子采样。 子采样SGM路径开销可以存储在存储器中。 当从存储器检索时，子采样的SGM路径成本可被内插以重构未存储在存储器中的其他路径成本。 重建路径成本可用于进一步的SGM处理。 在另外的示例中，这些技术可以对SGM路径成本或子采样的SGM路径成本执行与视差相关的量化，并将量化的SGM路径成本存储在存储器中。 本公开的技术可以减少带宽以及减少实现SGM算法所需的存储器占用空间。