公开(公告)号：US20220159309A1

公开(公告)日：2022-05-19

申请号：US17592981

申请日：2022-02-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Madhukar Budagavi ,  Minhua Zhou

IPC: H04N19/82

Abstract: A method for adaptive loop filtering of a reconstructed picture in a video encoder is provided that includes determining whether or not sample adaptive offset (SAO) filtering is applied to the reconstructed picture, and using adaptive loop filtering with no offset for the reconstructed picture when the SAO filtering is determined to be applied to the reconstructed picture.

公开(公告)号：US20220078489A1

公开(公告)日：2022-03-10

申请号：US17527200

申请日：2021-11-16

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：US11190776B2

公开(公告)日：2021-11-30

申请号：US17120930

申请日：2020-12-14

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/167 ,  H04N19/70 ,  H04N19/61 ,  H04N19/82 ,  H04N19/103 ,  H04N19/172 ,  H04N19/117 ,  H04N19/174 ,  H04N19/176 ,  H04N19/12 ,  H04N19/157 ,  H04N19/124 ,  H04N19/436

Abstract: A method for coding a video sequence is provided that includes encoding a portion of a picture in the video sequence in lossless coding mode, and signaling a lossless coding indicator in a compressed bit stream, wherein the lossless coding indicator corresponds to the portion of a picture and indicates whether or not the portion of the picture is losslessly coded. A method for decoding a compressed video bit stream is provided that includes determining that lossless coding mode is enabled, decoding a lossless coding indicator from the compressed video bit stream, wherein the lossless coding indicator corresponds to a portion of a picture in the compressed video bit stream and indicates whether or not the portion of the picture is losslessly coded, and decoding the portion of the picture in lossless coding mode when the lossless coding indicator indicates the portion of the picture is losslessly coded.

公开(公告)号：US11025960B2

公开(公告)日：2021-06-01

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: H04N19/00 ,  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：US20210099719A1

公开(公告)日：2021-04-01

申请号：US17120930

申请日：2020-12-14

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/167 ,  H04N19/70 ,  H04N19/61 ,  H04N19/82 ,  H04N19/103 ,  H04N19/172 ,  H04N19/117 ,  H04N19/174 ,  H04N19/176

Abstract: A method for coding a video sequence is provided that includes encoding a portion of a picture in the video sequence in lossless coding mode, and signaling a lossless coding indicator in a compressed bit stream, wherein the lossless coding indicator corresponds to the portion of a picture and indicates whether or not the portion of the picture is losslessly coded. A method for decoding a compressed video bit stream is provided that includes determining that lossless coding mode is enabled, decoding a lossless coding indicator from the compressed video bit stream, wherein the lossless coding indicator corresponds to a portion of a picture in the compressed video bit stream and indicates whether or not the portion of the picture is losslessly coded, and decoding the portion of the picture in lossless coding mode when the lossless coding indicator indicates the portion of the picture is losslessly coded.

公开(公告)号：US20210092419A1

公开(公告)日：2021-03-25

申请号：US17115165

申请日：2020-12-08

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/436 ,  H04N19/513

Abstract: A method for decoding a compressed video bit stream in a video decoder to recover a video sequence, the video decoder including a plurality of decoder processing cores is provided. The method includes determining that a picture is encoded in the compressed bit stream as a pre-determined number of independently encoded sub-pictures, and dispatching a first encoded sub-picture of the pre-determined number of sub-pictures to a first decoder processing core of the plurality of decoder processing cores and a second encoded sub-picture of the pre-determined number of sub-pictures to a second decoder processing core of the plurality of decoder processing cores, wherein the first encoded sub-picture and the second encoded sub-picture are independently decoded in parallel on the respective first and second decoder processing cores.

公开(公告)号：US20210058645A1

公开(公告)日：2021-02-25

申请号：US17093695

申请日：2020-11-10

Applicant: Texas Instruments Incorporated

Inventor： Ranga Ramanujam Srinivasan ,  Chaitanya Satish Ghone ,  Mihir Narendra Mody ,  Minhua Zhou

IPC: H04N19/895 ,  H04N19/172 ,  H04N19/107 ,  H04N19/39 ,  H04N19/65

Abstract: A method is provided that includes receiving pictures of a video sequence in a video encoder, and encoding the pictures to generate a compressed video bit stream that is transmitted to a video decoder in real-time, wherein encoding the pictures includes selecting a picture to be encoded as a delayed duplicate intra-predicted picture (DDI), wherein the picture would otherwise be encoded as an inter-predicted picture (P-picture), encoding the picture as an intra-predicted picture (I-picture) to generate the DDI, wherein the I-picture is reconstructed and stored for use as a reference picture for a decoder refresh picture, transmitting the DDI to the video decoder in non-real time, selecting a subsequent picture to be encoded as the decoder refresh picture, and encoding the subsequent picture in the compressed bit stream as the decoder refresh picture, wherein the subsequent P-picture is encoded as a P-picture predicted using the reference picture.

公开(公告)号：US20200304838A1

公开(公告)日：2020-09-24

申请号：US16889869

申请日：2020-06-02

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Minhua Zhou

IPC: H04N19/82

Abstract: A method for adaptive loop filtering of a reconstructed picture in a video encoder is provided that includes determining whether or not sample adaptive offset (SAO) filtering is applied to the reconstructed picture, and using adaptive loop filtering with no offset for the reconstructed picture when the SAO filtering is determined to be applied to the reconstructed picture.

公开(公告)号：US20200177918A1

公开(公告)日：2020-06-04

申请号：US16781755

申请日：2020-02-04

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/61 ,  H04N19/86 ,  H04N19/625 ,  H04N19/15 ,  H04N19/13 ,  H04N19/124 ,  H04N19/157 ,  H04N19/172 ,  H04N19/119

Abstract: A method for encoding a picture of a video sequence in a bit stream that constrains slice header processing overhead is provided. The method includes computing a maximum slice rate for the video sequence, computing a maximum number of slices for the picture based on the maximum slice rate, and encoding the picture wherein a number of slices used to encode the picture is enforced to be no more than the maximum number of slices.

公开(公告)号：US10574992B2

公开(公告)日：2020-02-25

申请号：US16167134

申请日：2018-10-22

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N3/28 ,  H04N19/129 ,  H04N19/433 ,  H04N19/119 ,  H04N19/174 ,  H04N19/436

Abstract: A method and apparatus for sub-picture based raster scanning coding order. The method includes dividing an image into even sub-pictures, and encoding parallel sub-pictures on multi-cores in raster scanning order within sub-pictures, wherein from core to core, coding of the sub-picture is independent around sub-picture boundaries, and wherein within a core, coding of a sub-picture is at least one of dependent or independent around sub-picture boundaries.