公开(公告)号：US20240114174A1

公开(公告)日：2024-04-04

申请号：US18541623

申请日：2023-12-15

Applicant: Texas Instruments Incorporated

Inventor： Vivienne Sze ,  Madhukar Budagavi ,  Akira Osamoto ,  Yasutomo Matsuba

IPC: H04N19/70

CPC classification number: H04N19/70

Abstract: A method and a video processor for preventing start code confusion. The method includes aligning bytes of a slice header relating to slice data when the slice header is not byte aligned or inserting differential data at the end of the slice header before the slice data when the slice header is byte aligned, performing emulation prevention byte insertion on the slice header, and combine the slice header and the slice data after performing emulation prevention byte insertion.

公开(公告)号：US20220368894A1

公开(公告)日：2022-11-17

申请号：US17875278

申请日：2022-07-27

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Akira Osamoto

IPC: H04N19/105 ,  H04N19/96 ,  H04N19/186 ,  H04N19/167 ,  H04N19/59

Abstract: A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes down sampling a first reconstructed luma block of a largest coding unit (LCU), computing parameters α and β of a linear model using immediate top neighboring reconstructed luma samples and left neighboring reconstructed luma samples of the first reconstructed luma block and reconstructed neighboring chroma samples of a chroma block corresponding to the first reconstructed luma block, wherein the linear model is PredC[x,y]=α·RecL′[x,y]+β, wherein x and y are sample coordinates, PredC is predicted chroma samples, and RecL′ is samples of the down sampled first reconstructed luma block, and wherein the immediate top neighboring reconstructed luma samples are the only top neighboring reconstructed luma samples used, and computing samples of a first predicted chroma block from corresponding samples of the down sampled first reconstructed luma block using the linear model and the parameters.

公开(公告)号：US20210195224A1

公开(公告)日：2021-06-24

申请号：US17193409

申请日：2021-03-05

Applicant: Texas Instruments Incorporated

Inventor： Hyung Joon Kim ,  Minhua Zhou ,  Akira Osamoto ,  Hideo Tamama

IPC: H04N19/192 ,  H04N19/119 ,  H04N19/147 ,  H04N19/176 ,  H04N19/51 ,  H04N19/593

Abstract: A method for coding unit partitioning in a video encoder is provided that includes performing intra-prediction on each permitted coding unit (CU) in a CU hierarchy of a largest coding unit (LCU) to determine an intra-prediction coding cost for each permitted CU, storing the intra-prediction coding cost for each intra-predicted CU in memory, and performing inter-prediction, prediction mode selection, and CU partition selection on each permitted CU in the CU hierarchy to determine a CU partitioning for encoding the LCU, wherein the stored intra-prediction coding costs for the CUs are used.

公开(公告)号：US11044485B2

公开(公告)日：2021-06-22

申请号：US16559788

申请日：2019-09-04

Applicant: Texas Instruments Incorporated

Inventor： Hyung Joon Kim ,  Minhua Zhou ,  Akira Osamoto ,  Hideo Tamama

IPC: H04N19/192 ,  H04N19/119 ,  H04N19/147 ,  H04N19/176 ,  H04N19/51 ,  H04N19/593 ,  H04N19/103

Abstract: A method for coding unit partitioning in a video encoder is provided that includes performing intra-prediction on each permitted coding unit (CU) in a CU hierarchy of a largest coding unit (LCU) to determine an intra-prediction coding cost for each permitted CU, storing the intra-prediction coding cost for each intra-predicted CU in memory, and performing inter-prediction, prediction mode selection, and CU partition selection on each permitted CU in the CU hierarchy to determine a CU partitioning for encoding the LCU, wherein the stored intra-prediction coding costs for the CUs are used.

公开(公告)号：US20190166384A1

公开(公告)日：2019-05-30

申请号：US16263309

申请日：2019-01-31

Applicant: Texas Instruments Incorporated

Inventor： Vivienne Sze ,  Madhukar Budagavi ,  Akira Osamoto ,  Yasutomo Matsuba

IPC: H04N19/70

Abstract: A method and a video processor for preventing start code confusion. The method includes aligning bytes of a slice header relating to slice data when the slice header is not byte aligned or inserting differential data at the end of the slice header before the slice data when the slice header is byte aligned, performing emulation prevention byte insertion on the slice header, and combine the slice header and the slice data after performing emulation prevention byte insertion.

公开(公告)号：US12184841B2

公开(公告)日：2024-12-31

申请号：US18199661

申请日：2023-05-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ranga Ramanujam Srinivasan ,  Hyung Joon Kim ,  Akira Osamoto

IPC: H04N19/11 ,  H04N19/119 ,  H04N19/136 ,  H04N19/147 ,  H04N19/157 ,  H04N19/174 ,  H04N19/176 ,  H04N19/33 ,  H04N19/593 ,  H04N19/61

Abstract: Several systems and methods for intra-prediction estimation of video pictures are disclosed. In an embodiment, the method includes accessing four ‘N×N’ pixel blocks comprising luma-related pixels. The four ‘N×N’ pixel blocks collectively configure a ‘2N×2N’ pixel block. A first pre-determined number of candidate luma intra-prediction modes is accessed for each of the four ‘N×N’ pixel blocks. A presence of one or more luma intra-prediction modes that are common among the candidate luma intra-prediction modes of at least two of the four ‘N×N’ pixel blocks is identified. The method further includes performing, based on the identification, one of (1) selecting a principal luma intra-prediction mode for the ‘2N×2N’ pixel block and (2) limiting a partitioning size to a ‘N×N’ pixel block size for a portion of the video picture corresponding to the ‘2N×2N’ pixel block.

公开(公告)号：US20240098249A1

公开(公告)日：2024-03-21

申请号：US18512471

申请日：2023-11-17

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Akira Osamoto

IPC: H04N19/105 ,  H04N19/167 ,  H04N19/186 ,  H04N19/59 ,  H04N19/96

CPC classification number: H04N19/105 ,  H04N19/167 ,  H04N19/186 ,  H04N19/59 ,  H04N19/96

Abstract: A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes down sampling a first reconstructed luma block of a largest coding unit (LCU), computing parameters α and β of a linear model using immediate top neighboring reconstructed luma samples and left neighboring reconstructed luma samples of the first reconstructed luma block and reconstructed neighboring chroma samples of a chroma block corresponding to the first reconstructed luma block, wherein the linear model is PredC[x,y]=α·RecL′[x,y]+β, wherein x and y are sample coordinates, PredC is predicted chroma samples, and RecL′ is samples of the down sampled first reconstructed luma block, and wherein the immediate top neighboring reconstructed luma samples are the only top neighboring reconstructed luma samples used, and computing samples of a first predicted chroma block from corresponding samples of the down sampled first reconstructed luma block using the linear model and the parameters.

公开(公告)号：US11849148B2

公开(公告)日：2023-12-19

申请号：US17350471

申请日：2021-06-17

Applicant: Texas Instruments Incorporated

Inventor： Vivienne Sze ,  Madhukar Budagavi ,  Akira Osamoto ,  Yasutomo Matsuba

IPC: H04N19/70

CPC classification number: H04N19/70

Abstract: A method and a video processor for preventing start code confusion. The method includes aligning bytes of a slice header relating to slice data when the slice header is not byte aligned or inserting differential data at the end of the slice header before the slice data when the slice header is byte aligned, performing emulation prevention byte insertion on the slice header, and combine the slice header and the slice data after performing emulation prevention byte insertion.

公开(公告)号：US11825078B2

公开(公告)日：2023-11-21

申请号：US17875278

申请日：2022-07-27

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Akira Osamoto

IPC: H04N11/02 ,  H04N19/105 ,  H04N19/96 ,  H04N19/186 ,  H04N19/167 ,  H04N19/59

CPC classification number: H04N19/105 ,  H04N19/167 ,  H04N19/186 ,  H04N19/59 ,  H04N19/96

Abstract: A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes down sampling a first reconstructed luma block of a largest coding unit (LCU), computing parameters α and β of a linear model using immediate top neighboring reconstructed luma samples and left neighboring reconstructed luma samples of the first reconstructed luma block and reconstructed neighboring chroma samples of a chroma block corresponding to the first reconstructed luma block, wherein the linear model is PredC[x,y]=α·RecL′[x,y]+β, wherein x and y are sample coordinates, PredC is predicted chroma samples, and RecL′ is samples of the down sampled first reconstructed luma block, and wherein the immediate top neighboring reconstructed luma samples are the only top neighboring reconstructed luma samples used, and computing samples of a first predicted chroma block from corresponding samples of the down sampled first reconstructed luma block using the linear model and the parameters.

公开(公告)号：US20230291897A1

公开(公告)日：2023-09-14

申请号：US18199661

申请日：2023-05-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ranga Ramanujam Srinivasan ,  Hyung Joon Kim ,  Akira Osamoto

IPC: H04N19/11 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/174 ,  H04N19/33 ,  H04N19/593 ,  H04N19/136 ,  H04N19/176 ,  H04N19/61

CPC classification number: H04N19/11 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/174 ,  H04N19/33 ,  H04N19/593 ,  H04N19/136 ,  H04N19/176 ,  H04N19/61

Abstract: Several systems and methods for intra-prediction estimation of video pictures are disclosed. In an embodiment, the method includes accessing four ‘N×N’ pixel blocks comprising luma-related pixels. The four ‘N×N’ pixel blocks collectively configure a ‘2N×2N’ pixel block. A first pre-determined number of candidate luma intra-prediction modes is accessed for each of the four ‘N×N’ pixel blocks. A presence of one or more luma intra-prediction modes that are common among the candidate luma intra-prediction modes of at least two of the four ‘N×N’ pixel blocks is identified. The method further includes performing, based on the identification, one of (1) selecting a principal luma intra-prediction mode for the ‘2N×2N’ pixel block and (2) limiting a partitioning size to a ‘N×N’ pixel block size for a portion of the video picture corresponding to the ‘2N×2N’ pixel block.