公开(公告)号：US09866853B2

公开(公告)日：2018-01-09

申请号：US14685453

申请日：2015-04-13

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Rajan Laxman Joshi ,  Natan Haim Jacobson

IPC: H04N19/00 ,  H04N19/19 ,  H04N19/176 ,  H04N19/147 ,  H04N19/11 ,  H04N19/152

CPC classification number: H04N19/19 ,  H04N19/11 ,  H04N19/147 ,  H04N19/152 ,  H04N19/176

Abstract: According to certain aspects, an apparatus for coding video data includes a memory for storing the video data and a processor. The memory includes a buffer. The processor is configured to receive the video data to be coded. The processor is further configured to determine a Lagrangian parameter for a coding mode based at least in part on a bit rate of the coding mode and a fullness of the buffer.

公开(公告)号：US09848193B2

公开(公告)日：2017-12-19

申请号：US14685430

申请日：2015-04-13

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Laxman Joshi

IPC: H04N19/00 ,  H04N19/124 ,  H04N19/174 ,  H04N19/15 ,  H04N19/152 ,  H04N19/176 ,  H04N19/423

CPC classification number: H04N19/124 ,  H04N19/15 ,  H04N19/152 ,  H04N19/174 ,  H04N19/176 ,  H04N19/423

Abstract: An apparatus for coding video data according to certain aspects includes a memory for storing the video data and a processor. The memory includes a buffer. The processor is configured to receive the video data to be coded. The processor is further configured to determine a quantization parameter (QP) of a current block of the video data without considering a type of content of the video data and a rate-distortion model associated with the type of content. The processor is also configured to code the current block in a bitstream using the determined QP.

公开(公告)号：US20170264918A1

公开(公告)日：2017-09-14

申请号：US15449755

申请日：2017-03-03

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Lexman Joshi

IPC: H04N19/91 ,  H04N19/182 ,  H04N19/48 ,  H04N19/13

CPC classification number: H04N19/91 ,  H04N19/13 ,  H04N19/182 ,  H04N19/48

Abstract: Methods and apparatus for coding video information having a plurality of video samples are disclosed. Video samples are partitioned into groups for transmission within a single clock cycle, wherein the samples are associated with a bit length B, and a group having a group size K. The sample group is mapped to a code number and coded to form a vector-based code comprising a first portion identifying a type of look-up-table used to performing the mapping, and a second portion representing the samples of the group. The look-up-table may be constructed based upon occurrence probabilities of different sample groups. In addition, different types of look-up-tables may be used for different B and K values.

公开(公告)号：US20170150158A1

公开(公告)日：2017-05-25

申请号：US15353468

申请日：2016-11-16

Applicant: QUALCOMM Incorporated

Inventor： Natan Haim Jacobson ,  Vijayaraghavan Thirumalai ,  Ike Ikizyan ,  Rajan Laxman Joshi

IPC: H04N19/30 ,  H04N19/176 ,  H04N19/152

CPC classification number: H04N19/30 ,  H04N19/115 ,  H04N19/124 ,  H04N19/149 ,  H04N19/152 ,  H04N19/176

Abstract: Provided are systems and methods for used fixed-point instead of floating point techniques in order to calculate various parameters for coding video data, including target rate, QP adjustment, buffer fullness, a Lagrangian parameters for a bitrate, and/or a Lagrangian parameter for the fullness of the buffer. By determining one or more of the parameters using fixed-point, hardware implementation costs may be decreased.

公开(公告)号：US20150296209A1

公开(公告)日：2015-10-15

申请号：US14685479

申请日：2015-04-13

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Laxman Joshi

IPC: H04N19/176 ,  H04N19/186 ,  H04N19/182 ,  H04N19/60 ,  H04N19/18

CPC classification number: H04N19/176 ,  H04N19/115 ,  H04N19/124 ,  H04N19/14

Abstract: A system and method for flatness detection for display stream compression (DSC) is disclosed. In one aspect, the method includes determining a first complexity value for a previous block of video data, a second complexity value for a current block of the video data, and a third complexity value for a next block of the video data. The method also includes determining whether the current block includes a transition from a complex region to a flat region based at least in part on the first, second, and third complexity values.

Abstract translation: 公开了用于显示流压缩（DSC）的平坦度检测的系统和方法。 在一个方面，该方法包括确定视频数据的先前块的第一复杂度值，视频数据的当前块的第二复杂度值和视频数据的下一个块的第三复杂度值。 该方法还包括至少部分地基于第一，第二和第三复杂度值来确定当前块是否包括从复杂区到平坦区的过渡。