公开(公告)号：US20240298042A1

公开(公告)日：2024-09-05

申请号：US18660921

申请日：2024-05-10

Applicant: Texas Instruments Incorporated

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

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/186 ,  H04N19/463 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  H04N19/91

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：US11856239B2

公开(公告)日：2023-12-26

申请号：US17746890

申请日：2022-05-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

IPC: H04N19/91 ,  H04N19/176 ,  H04N19/117 ,  H04N19/14 ,  H04N19/82 ,  H04N19/182 ,  H04N19/80

CPC classification number: H04N19/91 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/80 ,  H04N19/82

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.

公开(公告)号：US11606580B2

公开(公告)日：2023-03-14

申请号：US17243044

申请日：2021-04-28

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：US11350135B2

公开(公告)日：2022-05-31

申请号：US16417264

申请日：2019-05-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

IPC: H04N19/91 ,  H04N19/176 ,  H04N19/117 ,  H04N19/14 ,  H04N19/82 ,  H04N19/182 ,  H04N19/80

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.

公开(公告)号：US20220007038A1

公开(公告)日：2022-01-06

申请号：US17477602

申请日：2021-09-17

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：US11212557B2

公开(公告)日：2021-12-28

申请号：US16049543

申请日：2018-07-30

Applicant: Texas Instruments Incorporated

Inventor： Woo-Shik Kim ,  Madhukar Budagavi ,  Minhua Zhou

IPC: H04N19/82 ,  H04N19/86 ,  H04N19/117 ,  H04N19/174

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.

公开(公告)号：US20210321143A1

公开(公告)日：2021-10-14

申请号：US17355701

申请日：2021-06-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04N19/86 ,  H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/186 ,  H04N19/82 ,  H04N19/91 ,  H04N19/80

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：US20210266606A1

公开(公告)日：2021-08-26

申请号：US17243044

申请日：2021-04-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: 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：US11076174B2

公开(公告)日：2021-07-27

申请号：US15192547

申请日：2016-06-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04N19/00 ,  H04N19/86 ,  H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/186 ,  H04N19/82 ,  H04N19/91 ,  H04N19/80

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：US20190158857A1

公开(公告)日：2019-05-23

申请号：US16255670

申请日：2019-01-23

Applicant: Texas Instruments Incorporated

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

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

CPC classification number: H04N19/30 ,  H04N19/00 ,  H04N19/182 ,  H04N19/463 ,  H04N19/82

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.