公开(公告)号：US12075069B2

公开(公告)日：2024-08-27

申请号：US17477602

申请日：2021-09-17

Applicant: Texas Instruments Incorporated

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

IPC: G06K9/36 ,  G06K9/46 ,  H04N19/00 ,  H04N19/182 ,  H04N19/30 ,  H04N19/463 ,  H04N19/82

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.

公开(公告)号：US11849154B2

公开(公告)日：2023-12-19

申请号：US17355701

申请日：2021-06-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

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

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：US20230217045A1

公开(公告)日：2023-07-06

申请号：US18120624

申请日：2023-03-13

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

CPC classification number: 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：US10791335B2

公开(公告)日：2020-09-29

申请号：US16255670

申请日：2019-01-23

Applicant: Texas Instruments Incorporated

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

IPC: H04N19/30 ,  H04N19/463 ,  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：US10298963B2

公开(公告)日：2019-05-21

申请号：US15008888

申请日：2016-01-28

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：US10038903B2

公开(公告)日：2018-07-31

申请号：US13784599

申请日：2013-03-04

Applicant: Texas Instruments Incorporated

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

IPC: H04N7/26 ,  H04N19/117 ,  H04N19/82 ,  H04N19/86

CPC classification number: H04N19/117 ,  H04N19/82 ,  H04N19/86

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：US20170026654A1

公开(公告)日：2017-01-26

申请号：US15056193

申请日：2016-02-29

Applicant: Texas Instruments Incorporated

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

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

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.

Abstract translation: 一种使用分层样本自适应带偏移进行图像编码的方法和装置。 该方法包括对图像的一部分的信号进行解码，利用带偏移类型和偏移来确定子带的一部分的带偏移类型和偏移量，并根据所确定的像素值重建像素值 补偿值。

公开(公告)号：US09277194B2

公开(公告)日：2016-03-01

申请号：US13671722

申请日：2012-11-08

Applicant: Texas Instruments Incorporated

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

IPC: H04N7/16 ,  H04N19/00 ,  H04N19/463 ,  H04N19/82

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.

Abstract translation: 一种使用分层样本自适应带偏移进行图像编码的方法和装置。 该方法包括对图像的一部分的信号进行解码，利用带偏移类型和偏移来确定子带的一部分的带偏移类型和偏移量，并根据所确定的像素值重建像素值 补偿值。

公开(公告)号：US09253482B2

公开(公告)日：2016-02-02

申请号：US13671670

申请日：2012-11-08

Applicant: Texas Instruments Incorporated

Inventor： Woo-Shik Kim ,  Do-Kyoung Kwon

IPC: H04N19/00 ,  H04N19/182 ,  H04N19/176 ,  H04N19/117 ,  H04N19/14 ,  H04N19/82

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.

Abstract translation: 一种无符号编码的样本自适应偏移的方法和装置。 该方法包括为图像的至少一部分选择边缘偏移类型，将图像的至少部分的至少一个像素分类为边缘形状类别，计算像素的偏移，确定偏移大于或小于 预定阈值，基于所述阈值确定改变所述偏移的符号; 并执行熵编码计算偏移的符号和偏移的值。

公开(公告)号：US20130182759A1

公开(公告)日：2013-07-18

申请号：US13784599

申请日：2013-03-04

Applicant: Texas Instruments Incorporated

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

IPC: H04N7/26

CPC classification number: H04N19/117 ,  H04N19/82 ,  H04N19/86

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.

Abstract translation: 提供了一种用于视频编码器中的采样自适应偏移（SAO）滤波的方法，其包括估计图像的最大编码单元（LCU）的颜色分量的SAO参数，其中估计SAO参数包括使用至少一些非去块滤波 重建像素，以估计SAO参数，根据估计的SAO参数对重建的LCU执行SAO滤波，以及在压缩视频比特流中对LCU进行熵编码SAO信息，其中SAO信息将估计的SAO参数信号发送给 LCU。