公开(公告)号：US20190215517A1

公开(公告)日：2019-07-11

申请号：US16244871

申请日：2019-01-10

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan RAMASUBRAMONIAN ,  Dmytro RUSANOVSKYY

IPC: H04N19/124 ,  H04N19/186 ,  H04N9/68 ,  G06T5/00

Abstract: Dynamic Range Adjustment can be used to correct distortions that can occur when the dynamic range of the colors in video are transformed. In various examples, Dynamic Range Adjustment can be performed using a piecewise linear function that takes as input a range of color values. Parameters describing the piecewise linear function can be encoded into a bitstream, and the parameters can be used by a decoding process to reconstruct the piecewise linear function. To improve encoding efficiency, techniques can be applied by which redundant values in the parameters need not be encoded when the range of input values for the piecewise linear function can be divided into portions having equal lengths. The decoding process can derive the omitted values from values that are provided, and can apply the piecewise linear function to decoded video data to perform Dynamic Range Adjustment.

公开(公告)号：US20190014330A1

公开(公告)日：2019-01-10

申请号：US16028212

申请日：2018-07-05

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan RAMASUBRAMONIAN ,  Joel SOLE ROJALS ,  Dmytro RUSANOVSKYY

IPC: H04N19/186 ,  H04N19/98 ,  G06T5/00 ,  H04N19/513 ,  H04N19/159

Abstract: An apparatus configured to process video data includes a memory and a processor in communication with the memory where the processor is configured to obtain an input picture including a color component having a first color characteristic, obtain a plurality of parameters associated with the color component of at least one sample of the input picture where the plurality of parameters are indicative of pivot points associated with a piece-wise linear function associated with the color component, determine that a value of at least one parameter of the plurality of parameters includes a negative value, apply, on the at least one sample of the input picture, the piece-wise linear function defined with the at least one parameter having a negative value, generate at least one output sample of an output picture including the color component having a second color characteristic based on the application of the piece-wise linear function.

公开(公告)号：US20150358640A1

公开(公告)日：2015-12-10

申请号：US14730041

申请日：2015-06-03

Applicant: QUALCOMM Incorporated

Inventor： Fnu HENDRY ,  Ye-Kui WANG ,  Adarsh Krishnan RAMASUBRAMONIAN

IPC: H04N19/547 ,  H04N19/61 ,  H04N19/44

CPC classification number: H04N19/547 ,  H04N19/30 ,  H04N19/44 ,  H04N19/463 ,  H04N19/61 ,  H04N19/70

Abstract: Video data bitstreams may contain bitstream conformance parameters, such as hypothetical reference decoder (HRD) parameters, which may be used to allow a decoder to test the conformance of a received bitstream. In multi-layer codecs transmitted using partitions, the video data may be associated with one or more layer sets. Each layer set may be associated with one or more output layer sets. Each output layer set may be further associated with one or more partitioning schemes. Conformance parameters are mapped to partitions of a partitioning scheme, based upon the output layer set that the partitioning scheme is associated with. This allows for a partition to be associated with different conformance parameters, depending upon the output layer set that is being used.

Abstract translation: 视频数据比特流可以包含比特流一致性参数，诸如假设参考解码器（HRD）参数，其可以用于允许解码器测试接收的比特流的一致性。 在使用分区传输的多层编解码器中，视频数据可以与一个或多个层集相关联。 每个层集合可以与一个或多个输出层集相关联。 每个输出层集合可以进一步与一个或多个分区方案相关联。 基于分区方案相关联的输出层集，将一致性参数映射到分区方案的分区。 这允许分区与不同的一致性参数相关联，这取决于正在使用的输出层集。

公开(公告)号：US20150103928A1

公开(公告)日：2015-04-16

申请号：US14514153

申请日：2014-10-14

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Adarsh Krishnan RAMASUBRAMONIAN ,  Ye-Kui WANG

IPC: H04N19/33 ,  H04N19/174 ,  H04N19/46

CPC classification number: H04N19/33 ,  H04N19/174 ,  H04N19/30 ,  H04N19/46 ,  H04N19/597 ,  H04N19/70

Abstract: An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a reference layer (RL) and an enhancement layer (EL), the RL having an RL picture in a first access unit, and the EL having a first EL picture in the first access unit, wherein the first EL picture is associated with a first set of parameters. The processor is configured to determine whether the first EL picture is an intra random access point (IRAP) picture, determine whether the first access unit immediately follows a splice point where first video information is joined with second video information including the first EL picture, and perform, based on the determination of whether the first EL picture is an intra random access point (IRAP) picture and whether the first access unit immediately follows a splice point, one of (1) refraining from associating the first EL picture with a second set of parameters that is different from the first set of parameters, or (2) associating the first EL picture with a second set of parameters that is different from the first set of parameters. The processor may encode or decode the video information.

Abstract translation: 被配置为对视频信息进行编码的装置包括与存储器单元通信的存储器单元和处理器。 存储器单元被配置为存储与参考层（RL）和增强层（EL）相关联的视频信息，RL在第一存取单元中具有RL图像，并且EL在第一存取单元中具有第一EL图像 ，其中所述第一EL图像与第一组参数相关联。 处理器被配置为确定第一EL图像是否是内部随机接入点（IRAP）图像，确定第一存取单元是否紧接着第一视频信息与包括第一EL图像的第二视频信息相连接的拼接点，以及 执行基于第一EL图像是否是内部随机接入点（IRAP）图像的确定以及第一存取单元是否紧跟在拼接点之后，（1）避免将第一EL图像与第二组相关联 的参数不同于第一组参数，或者（2）将第一EL图像与不同于第一组参数的第二组参数相关联。 处理器可以对视频信息进行编码或解码。

公开(公告)号：US20150103922A1

公开(公告)日：2015-04-16

申请号：US14512962

申请日：2014-10-13

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan RAMASUBRAMONIAN ,  Ying CHEN ,  Ye-Kui WANG ,  Fnu HENDRY

IPC: H04N19/187

CPC classification number: H04N19/187 ,  H04N19/30 ,  H04N19/46 ,  H04N19/68 ,  H04N19/70 ,  H04N19/80 ,  H04N19/86

Abstract: An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a first video layer having a first picture. The processor is configured to process picture order count (POC) derivation information associated with the first picture, and determine, based on the POC derivation information associated with the first picture, a POC value of at least one other picture in the first video layer that precedes the first picture in decoding order. The processor may encode or decode the video information.

Abstract translation: 被配置为对视频信息进行编码的装置包括与存储器单元通信的存储器单元和处理器。 存储单元被配置为存储与具有第一图像的第一视频层相关联的视频信息。 处理器被配置为处理与第一图像相关联的图像顺序计数（POC）导出信息，并且基于与第一图像相关联的POC推导信息，确定第一视频层中的至少一个其他图像的POC值， 先于解码顺序的第一张图片。 处理器可以对视频信息进行编码或解码。

公开(公告)号：US20140003506A1

公开(公告)日：2014-01-02

申请号：US13929052

申请日：2013-06-27

Applicant: Qualcomm Incorporated

Inventor： Ye-Kui WANG ,  Adarsh Krishnan RAMASUBRAMONIAN

IPC: H04N7/32

CPC classification number: H04N19/50 ,  H04N19/463 ,  H04N19/58 ,  H04N19/70

Abstract: In one example, a device for decoding video data includes a video decoder configured to decode a value representative of a difference between most significant bits (MSBs) of a reference picture order count (POC) value and MSBs of a long-term reference picture (LTRP) POC value, wherein the reference POC value corresponds to a picture for which data must have been received in order to properly decode a current picture, determine the MSBs of the LTRP POC value based on the decoded value and the reference POC value, and decode at least a portion of the current picture relative to the LTRP based at least in part on the LTRP POC value. The picture for which data must have been received in order to properly decode a current picture may correspond to the current picture itself or a most recent random access point (RAP) picture.

Abstract translation: 在一个示例中，用于解码视频数据的设备包括：视频解码器，被配置为对表示参考图像顺序计数（POC）值的最高有效位（MSB）与长期参考图像的MSB之间的差异的值进行解码; LTRP）POC值，其中参考POC值对应于必须接收数据的图像以便正确解码当前图像，基于解码值和参考POC值确定LTRP POC值的MSB，以及 至少部分地基于LTRP POC值来解码当前图片相对于LTRP的至少一部分。 为了正确地解码当前画面而必须接收数据的画面可对应于当前画面本身或最近的随机存取点（RAP）画面。

公开(公告)号：US20230232000A1

公开(公告)日：2023-07-20

申请号：US18188321

申请日：2023-03-22

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan RAMASUBRAMONIAN ,  Geert VAN DER AUWERA ,  Luong PHAM VAN ,  Marta KARCZEWICZ

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: Techniques are described for improving intra-subpartitioning (ISP) mode for splitting coding blocks into sub-blocks. In some cases, whether ISP mode is enabled for a coding block is based on size constraints pertaining to data units (e.g., VPDUs, transform blocks, among others). For instance, based on a size constraint related to a VPDU, the ISP mode can be disabled for coding blocks crossing VPDU boundaries. In some cases, whether to enable ISP mode may be based on comparison of the width and/or height of the coding block to size thresholds corresponding to one or more maximum transform block sizes. In some cases, where the ISP mode is enabled for a coding block, a value of a flag used for defining a type of split, horizontal or vertical, for the coding block, can be inferred based on the width and/or height of the coding block relative to one or more thresholds.

公开(公告)号：US20200252608A1

公开(公告)日：2020-08-06

申请号：US16777732

申请日：2020-01-30

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan RAMASUBRAMONIAN ,  Geert Van der Auwera ,  Luong PHAM VAN ,  Marta KARCZEWICZ

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/59 ,  H04N19/61 ,  H04N19/593

Abstract: Techniques are described for improving intra-subpartitioning (ISP) mode for splitting coding blocks into sub-blocks. In some cases, whether ISP mode is enabled for a coding block is based on size constraints pertaining to data units (e.g., VPDUs, transform blocks, among others). For instance, based on a size constraint related to a VPDU, the ISP mode can be disabled for coding blocks crossing VPDU boundaries. In some cases, whether to enable ISP mode may be based on comparison of the width and/or height of the coding block to size thresholds corresponding to one or more maximum transform block sizes. In some cases, where the ISP mode is enabled for a coding block, a value of a flag used for defining a type of split, horizontal or vertical, for the coding block, can be inferred based on the width and/or height of the coding block relative to one or more thresholds.

公开(公告)号：US20190297337A1

公开(公告)日：2019-09-26

申请号：US16360971

申请日：2019-03-21

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan RAMASUBRAMONIAN ,  Dmytro Rusanovskyy ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/70 ,  H04N19/124

Abstract: Dynamic Range Adjustment can be used to correct distortions that can occur when the dynamic range of the colors in video are transformed. In various examples, Dynamic Range Adjustment can be performed using a function without discontinuities that takes as input a range of color values. Parameters describing the function can be encoded into a bitstream, and the parameters can be used by a decoding process to reconstruct the function. The function can be linear or non-linear. The function optionally includes a piece-wise linear function.

公开(公告)号：US20150373350A1

公开(公告)日：2015-12-24

申请号：US14742286

申请日：2015-06-17

Applicant: QUALCOMM Incorporated

Inventor： Fnu HENDRY ,  Adarsh Krishnan RAMASUBRAMONIAN ,  Ye-Kui WANG

IPC: H04N19/31 ,  H04N19/105 ,  H04N19/597 ,  H04N19/51 ,  H04N19/187 ,  H04N19/70

CPC classification number: H04N19/187 ,  H04N19/105 ,  H04N19/124 ,  H04N19/172 ,  H04N19/176 ,  H04N19/30 ,  H04N19/31 ,  H04N19/50 ,  H04N19/51 ,  H04N19/52 ,  H04N19/597 ,  H04N19/70

Abstract: An apparatus for coding video information according to certain aspects includes a memory and a processor configured to: determine a value of a first flag indicative of whether preceding pictures that precede a current picture in a current layer in decoding order are used for temporal motion vector prediction (TMVP) of subsequent pictures that follow the current picture in the current layer in decoding order, the first flag associated with the current picture; and refrain from using the preceding pictures in the current layer as reference pictures for TMVP of the current picture, in response to determining that the value of the first flag indicates that the preceding pictures in the current layer should not be used for TMVP of the subsequent pictures in the current layer.

Abstract translation: 根据某些方面的用于编码视频信息的装置包括存储器和处理器，其被配置为：确定指示在解码顺序中在当前层中的当前图像之前的先前图像之前的先前图像的值是否用于时间运动矢量预测 （TMVP）与当前图片相关联的第一标志，其中以后续图像在当前图层中以解码顺序跟随当前图片; 并且响应于确定第一标志的值指示当前层中的先前图像不应被用于随后的TMVP的TMVP而不使用当前层中的先前图片作为当前图片的TMVP的参考图片 图片在当前图层。