公开(公告)号：US10735751B2

公开(公告)日：2020-08-04

申请号：US16038975

申请日：2018-07-18

Applicant: Texas Instruments Incorporated

Inventor： Arun Shankar Kudana ,  Soyeb Nagori

IPC: H04N19/194 ,  H04N19/11 ,  H04N19/114 ,  H04N19/142 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/573

Abstract: Systems, methods and computer readable mediums are presented for encoding a stream of input video frames, in which the input video frames are down sampled and the down sampled frames are encoded in a first encoding pass to generate a set of first pass coded frames forming a single first pass I frame and a plurality of first pass P frames formed into first pass sub-groups of pictures (SUB-GOPs). First pass encoding statistics are generated for individual first pass SUB-GOPs, and the statistics are used to encode the input video frames in a second encoding pass to generate a set of second pass coded frames.

公开(公告)号：US20200236394A1

公开(公告)日：2020-07-23

申请号：US16838115

申请日：2020-04-02

Applicant: Texas Instruments Incorporated

Inventor： Soyeb Nagori ,  Arun Shankar Kudana ,  Pramod Kumar Swami

IPC: H04N19/523 ,  H04N19/157 ,  H04N19/156 ,  H04N19/117 ,  H04N19/114 ,  H04N19/109 ,  H04N19/61 ,  H04N19/172 ,  H04N19/147 ,  H04N19/176 ,  H04N19/105

Abstract: Several techniques aimed at reducing computational complexity when encoding uses bi-predictively encoded frames (B-frames) are implemented in a video encoder. In an embodiment, B-frames are not used as reference frames for encoding P-frames and other B-frames. Non-use of B-frames allows a de-blocking filter used in the video encoder to be switched off when reconstructing encoded B-frames, and use of a lower complexity filter for fractional-resolution motion search for B-frames. In another embodiment, cost functions used in motion estimation for B-frames are simplified to reduce computational complexity. In one more embodiment, fractional pixel refinement in motion search for B-frames is simplified. In yet another embodiment, predictors used in motion estimation for a macro-block in a P-frame are selected from a B-frame that uses a same reference frame as the P-frame.

公开(公告)号：US20180324443A1

公开(公告)日：2018-11-08

申请号：US16038975

申请日：2018-07-18

Applicant: Texas Instruments Incorporated

Inventor： Arun Shankar Kudana ,  Soyeb Nagori

IPC: H04N19/194 ,  H04N19/159 ,  H04N19/114 ,  H04N19/176 ,  H04N19/11 ,  H04N19/142 ,  H04N19/573 ,  H04N19/593

CPC classification number: H04N19/194 ,  H04N19/11 ,  H04N19/114 ,  H04N19/142 ,  H04N19/159 ,  H04N19/176 ,  H04N19/573 ,  H04N19/593

Abstract: Systems, methods and computer readable mediums are presented for encoding a stream of input video frames, in which the input video frames are down sampled and the down sampled frames are encoded in a first encoding pass to generate a set of first pass coded frames forming a single first pass I frame and a plurality of first pass P frames formed into first pass sub-groups of pictures (SUB-GOPs). First pass encoding statistics are generated for individual first pass SUB-GOPs, and the statistics are used to encode the input video frames in a second encoding pass to generate a set of second pass coded frames.

公开(公告)号：US20180035128A1

公开(公告)日：2018-02-01

申请号：US15728138

申请日：2017-10-09

Applicant: Texas Instruments Incorporated

Inventor： Soyeb Nagori ,  Arun Shankar Kudana ,  Pramod Kumar Swami

IPC: H04N19/523 ,  H04N19/176 ,  H04N19/172 ,  H04N19/157 ,  H04N19/156 ,  H04N19/147 ,  H04N19/117 ,  H04N19/114 ,  H04N19/109 ,  H04N19/61 ,  H04N19/105

CPC classification number: H04N19/523 ,  H04N19/105 ,  H04N19/109 ,  H04N19/114 ,  H04N19/117 ,  H04N19/147 ,  H04N19/156 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/61

Abstract: Several techniques aimed at reducing computational complexity when encoding uses bi-predictively encoded frames (B-frames) are implemented in a video encoder. In an embodiment, B-frames are not used as reference frames for encoding P-frames and other B-frames. Non-use of B-frames allows a de-blocking filter used in the video encoder to be switched off when reconstructing encoded B-frames, and use of a lower complexity filter for fractional-resolution motion search for B-frames. In another embodiment, cost functions used in motion estimation for B-frames are simplified to reduce computational complexity. In one more embodiment, fractional pixel refinement in motion search for B-frames is simplified. In yet another embodiment, predictors used in motion estimation for a macro-block in a P-frame are selected from a B-frame that uses a same reference frame as the P-frame.

公开(公告)号：US20130089140A1

公开(公告)日：2013-04-11

申请号：US13644272

申请日：2012-10-04

Applicant: Texas Instruments Incorporated

Inventor： Arun Shankar Kudana ,  Uday Pudipeddi Kiran ,  Anurag Mithalal Jain ,  Soyeb Nagori

IPC: H04N7/32

CPC classification number: H04N19/152 ,  H04N19/115 ,  H04N19/124 ,  H04N19/149 ,  H04N19/172

Abstract: Several methods and systems for encoding of multimedia pictures are disclosed. In an embodiment, an occupancy level of a coded picture buffer (CPB) associated with a hypothetical reference decoder (HRD) is estimated at an instant of removal of an access unit corresponding to a multimedia picture from the CPB for decoding the access unit. A number of bits for encoding the multimedia picture is allocated based on the estimated occupancy level of the CPB. The multimedia picture is encoded based on the allocated number of bits.

Abstract translation: 公开了用于多媒体图像编码的几种方法和系统。 在一个实施例中，在从用于解码访问单元的CPB去除与多媒体图像相对应的访问单元的时刻，估计与假设参考解码器（HRD）相关联的编码图像缓冲器（CPB）的占用等级。 基于CPB的估计占用水平来分配用于编码多媒体图像的位数。 基于分配的位数对多媒体图像进行编码。

公开(公告)号：US11876989B2

公开(公告)日：2024-01-16

申请号：US17242433

申请日：2021-04-28

Applicant: Texas Instruments Incorporated

Inventor： Uday Pudipeddi Kiran ,  Deepak Kumar Poddar ,  Pramod Kumar Swami ,  Arun Shankar Kudana

IPC: H04N11/02 ,  H04N19/423 ,  H04N19/577 ,  H04N19/177 ,  H04N19/44

CPC classification number: H04N19/423 ,  H04N19/177 ,  H04N19/44 ,  H04N19/577

Abstract: Several methods and systems for facilitating multimedia data encoding are disclosed. In an embodiment, a plurality of picture buffers associated with multimedia data are received in an order of capture associated with the plurality of picture buffers. Buffer information is configured for each picture buffer from among the plurality of picture buffers comprising at least one of a metadata associated with the corresponding picture buffer and one or more encoding parameters for the corresponding picture buffer. A provision of picture buffers in an order of encoding is facilitated based on the configured buffer information.

公开(公告)号：US11792399B2

公开(公告)日：2023-10-17

申请号：US17380089

申请日：2021-07-20

Applicant: Texas Instruments Incorporated

Inventor： Arun Shankar Kudana ,  Soyeb Nagori

IPC: H04N19/126 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/126 ,  H04N19/139 ,  H04N19/176

Abstract: Several methods, systems, and computer program products for quantization of video content are disclosed. In an embodiment, the method includes determining by a processing module, motion information associated with a block of video data of the video content. A degree of randomness associated with the block of video data is determined by the processing module based on the motion information. A value of a quantization parameter (QP) associated with the block of video data is modulated by a quantization module based on the determined degree of randomness.

公开(公告)号：US20230042575A1

公开(公告)日：2023-02-09

申请号：US17969776

申请日：2022-10-20

Applicant: Texas Instruments Incorporated

Inventor： Arun Shankar Kudana ,  Soyeb Nagori

IPC: H04N19/513 ,  H04N19/56 ,  H04N19/105 ,  H04N19/112 ,  H04N19/58

Abstract: Several methods and systems for estimating motion in a plurality of multimedia pictures are disclosed. In an embodiment, at least one temporal distance between a multimedia picture and one or more reference pictures corresponding to the multimedia picture in a capture order associated with the plurality of multimedia pictures is computed. The at least one temporal distance is computed subsequent to an encoding of the multimedia picture. At least one motion estimation parameter is determined based on the at least one temporal distance. Motion associated with a subsequent multimedia picture to be encoded is estimated based on the at least one motion estimation parameter.

公开(公告)号：US11503325B2

公开(公告)日：2022-11-15

申请号：US16920815

申请日：2020-07-06

Applicant: Texas Instruments Incorporated

Inventor： Arun Shankar Kudana ,  Soyeb Nagori

IPC: H04N19/513 ,  H04N19/56 ,  H04N19/105 ,  H04N19/112 ,  H04N19/58 ,  H04N19/172

Abstract: Several methods and systems for estimating motion in a plurality of multimedia pictures are disclosed. In an embodiment, at least one temporal distance between a multimedia picture and one or more reference pictures corresponding to the multimedia picture in a capture order associated with the plurality of multimedia pictures is computed. The at least one temporal distance is computed subsequent to an encoding of the multimedia picture. At least one motion estimation parameter is determined based on the at least one temporal distance. Motion associated with a subsequent multimedia picture to be encoded is estimated based on the at least one motion estimation parameter.

公开(公告)号：US20220248038A1

公开(公告)日：2022-08-04

申请号：US17545146

申请日：2021-12-08

Applicant: Texas Instruments Incorporated

Inventor： Soyeb Nagori ,  Arun Shankar Kudana ,  Manu Mathew

IPC: H04N19/196 ,  H04N19/142 ,  H04N19/177 ,  H04N19/152 ,  H04N19/126

Abstract: A method of rate control in coding of a video sequence to generate a compressed bit stream is provided that includes computing a sequence base quantization step size for a sequence of pictures in the video sequence, computing a picture base quantization step size for a picture in the sequence of pictures based on the sequence base quantization step size, a type of the picture, and a level of the picture in a rate control hierarchy, and coding the picture using the picture base quantization step size to generate a portion of the compressed bit stream.