公开(公告)号：US09918105B2

公开(公告)日：2018-03-13

申请号：US14876699

申请日：2015-10-06

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Ye-Kui Wang ,  Krishnakanth Rapaka ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/593 ,  H04N19/513 ,  H04N19/70 ,  H04N19/44 ,  H04N19/186 ,  H04N19/176 ,  H04N19/52

CPC classification number: H04N19/593 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/513 ,  H04N19/52 ,  H04N19/70

Abstract: In general, the disclosure describes techniques related to block vector coding for Intra Block Copy and Inter modes. In one example, the disclosure is directed to a video coding device comprising a memory configured to store video data and one or more processors. The video coding device is configured to determine a reference picture used for coding the current video block and determine a picture order count (POC) value for the reference picture. In response to the POC value for the reference picture being equal to a POC value for a current picture that includes the current video block, the video coding device sets a value of a syntax element to indicate that a reference picture list includes the current picture. Otherwise, the video coding device sets the value of the syntax element to indicate that the reference picture list does not include the current picture.

公开(公告)号：US09743097B2

公开(公告)日：2017-08-22

申请号：US14191311

申请日：2014-02-26

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Liwei Guo ,  Jianle Chen ,  Krishnakanth Rapaka

IPC: H04N19/30 ,  H04N19/33 ,  H04N19/513 ,  H04N19/43 ,  H04N19/55 ,  H04N19/52 ,  H04N19/61

CPC classification number: H04N19/33 ,  H04N19/43 ,  H04N19/513 ,  H04N19/52 ,  H04N19/55 ,  H04N19/61

Abstract: In one implementation, an apparatus is provided for encoding or decoding video information. The apparatus comprises a memory unit configured to store video information associated with a base layer and/or an enhancement layer. The apparatus further comprises a processor operationally coupled to the memory unit. In one embodiment, the processor is configured to determine a scaling factor based on spatial dimension values associated with the base and enhancement layers such that the scaling factor is constrained within a predetermined range. The processor is also configured to spatially scale an element associated with the base layer or enhancement layer using the scaling factor and a temporal motion vector scaling process.

公开(公告)号：US20170195679A1

公开(公告)日：2017-07-06

申请号：US15465271

申请日：2017-03-21

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Adarsh Krishnan Ramasubramonian ,  Jianle Chen

IPC: H04N19/36 ,  H04N19/105 ,  H04N19/70

CPC classification number: H04N19/36 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/30 ,  H04N19/436 ,  H04N19/597 ,  H04N19/70 ,  H04N19/96

Abstract: Bitstream restrictions or constraints on the partitioning of pictures across layers of video data are described. In some examples, the number of tiles per picture for each layer of a plurality of layers is constrained based on a maximum number of tiles per picture for the layer. In some examples, the number of tiles per picture for each layer of the plurality of layers is no greater than the maximum number of tiles per picture for the layer. In some examples, a sum of the numbers of tiles per picture for the plurality of layers is no greater than a sum of the maximum numbers of tiles per picture for the plurality of layers. In some examples, a second largest coding unit (LCU) or coding tree block (CTB) size for a second layer is constrained based on, e.g., to be equal to, a first LCU size for a first layer.

公开(公告)号：US09602822B2

公开(公告)日：2017-03-21

申请号：US14254400

申请日：2014-04-16

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/13 ,  H04N19/70 ,  H04N19/30 ,  H04N19/169 ,  H04N19/172 ,  H04N19/187

CPC classification number: H04N19/187 ,  H04N19/13 ,  H04N19/172 ,  H04N19/188 ,  H04N19/30 ,  H04N19/44 ,  H04N19/70

Abstract: In one example, the disclosure is directed to techniques that include receiving a bitstream comprising at least a syntax element, a first network abstraction layer unit type, and a coded access unit comprising a plurality of pictures. The techniques further include determining a value of the syntax element which indicates whether the access unit was coded using cross-layer alignment. The techniques further include determining the first network abstraction layer unit type for a picture in the access unit and determining whether the first network abstraction layer unit type equals a value in a range of type values. The techniques further include setting a network abstraction layer unit type for all other pictures in the coded access unit to equal the value of the first network abstraction layer unit type if the first network abstraction layer unit type is equal to a value in the range of type values.

公开(公告)号：US09591324B2

公开(公告)日：2017-03-07

申请号：US14513113

申请日：2014-10-13

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/503 ,  H04N19/30 ,  H04N19/44 ,  H04N19/51 ,  H04N19/91 ,  H04N19/61 ,  H04N19/70

CPC classification number: H04N19/503 ,  H04N19/30 ,  H04N19/44 ,  H04N19/51 ,  H04N19/61 ,  H04N19/70 ,  H04N19/91

Abstract: Systems and methods for separately defining and indicating inter-layer prediction dependencies for a first layer with respect to each of a number of enhancement layers associated with the first layer are described herein. One aspect of the subject matter described in the disclosure provides a video encoder comprising a memory unit configured to store a first picture associated with a first layer and enhancement layer pictures associated with a plurality of enhancement layers. The video encoder further comprises a processor in communication with the memory unit. The processor is configured to provide a separate indication for each of the enhancement layers that indicates whether the first picture can be used for inter-layer prediction of the enhancement layer picture in a respective enhancement layer.

Abstract translation: 这里描述了用于相对于与第一层相关联的多个增强层中的每一个分别定义和指示第一层的层间预测依赖性的系统和方法。 在本公开中描述的主题的一个方面提供了一种视频编码器，其包括被配置为存储与第一层相关联的第一画面的存储器单元和与多个增强层相关联的增强层画面。 视频编码器还包括与存储器单元通信的处理器。 处理器被配置为为每个增强层提供指示第一图像是否可以用于相应增强层中的增强层图像的层间预测的单独指示。

公开(公告)号：US20160353117A1

公开(公告)日：2016-12-01

申请号：US15158741

申请日：2016-05-19

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Krishnakanth Rapaka ,  Cheng-Teh Hsieh ,  Rajan Laxman Joshi ,  Ye-Kui Wang ,  Chao Pang ,  Marta Karczewicz

IPC: H04N19/174 ,  H04N19/139 ,  H04N19/513 ,  H04N19/105

CPC classification number: H04N19/174 ,  H04N19/103 ,  H04N19/105 ,  H04N19/139 ,  H04N19/521 ,  H04N19/593 ,  H04N19/70

Abstract: A device for decoding video data includes a memory configured to store the video data and one or more processors configured to receive a slice of the video data, parse an intra block copy (IBC) syntax element to determine that an IBC mode is enabled for the slice, parse a slice type syntax element associated with the slice to determine the slice is an I slice, and decode the slice as an I slice by decoding all blocks of the slice using intra prediction coding modes.

Abstract translation: 用于解码视频数据的设备包括被配置为存储视频数据的存储器和被配置为接收视频数据片段的一个或多个处理器，解析帧内块复制（IBC）语法元素，以确定为IBC模式启用IBC模式 切片，解析与切片相关联的切片类型语法元素以确定切片是I切片，并且通过使用帧内预测编码模式对切片的所有块进行解码来将切片解码为I切片。

公开(公告)号：US20150373334A1

公开(公告)日：2015-12-24

申请号：US14743474

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Marta Karczewicz ,  Chao Pang ,  Joel Sole Rojals

IPC: H04N19/139 ,  H04N19/52 ,  H04N19/176 ,  H04N19/70 ,  H04N19/513 ,  H04N19/13

CPC classification number: H04N19/139 ,  H04N19/13 ,  H04N19/176 ,  H04N19/52 ,  H04N19/521 ,  H04N19/593 ,  H04N19/70

Abstract: An example method for decoding video data includes receiving syntax elements (SEs) for a component of a block vector that represents a displacement between a current block of video data and a predictor block of video data; decoding the SEs to determine a value of the component by at least: decoding a first SE to determine whether or not an absolute value of the component (AbsValcomp) is greater than zero; where AbsValcomp is greater than zero, decoding a second SE to determine whether AbsValcomp is greater than a threshold based on an order of a set of codes; where AbsValcomp is greater than the threshold, decoding, using the set of codes, a third SE to determine AbsValcomp minus an offset based on the order of the set of codes; and where AbsValcomp is greater than zero, decoding a fourth SE to determine a sign of the value of the component.

Abstract translation: 用于解码视频数据的示例性方法包括：接收表示当前视频数据块与视频数据的预测块之间的位移的块向量的分量的语法元素（SE）; 通过至少解码SE来解码组件的值：解码第一SE以确定组件（AbsValcomp）的绝对值是否大于零; 其中AbsValcomp大于零，解码第二SE以基于代码集合的顺序来确定AbsValcomp是否大于阈值; 其中AbsValcomp大于阈值，使用该组代码解码第三SE以基于代码集的顺序来确定AbsValcomp减去偏移; 并且其中AbsValcomp大于零，解码第四SE以确定组件的值的符号。

公开(公告)号：US20150319448A1

公开(公告)日：2015-11-05

申请号：US14701004

申请日：2015-04-30

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Ye-Kui Wang ,  Fnu Hendry ,  Krishnakanth Rapaka

IPC: H04N19/39 ,  H04N19/29 ,  H04N19/187

CPC classification number: H04N21/4516 ,  H04N19/127 ,  H04N19/157 ,  H04N19/187 ,  H04N19/29 ,  H04N19/30 ,  H04N19/39 ,  H04N19/436 ,  H04N19/44 ,  H04N19/48 ,  H04N19/66 ,  H04N19/70 ,  H04N19/85 ,  H04N21/234327 ,  H04N21/816

Abstract: A multi-layer video decoder is configured to determine, based on a list of triplet entries, whether the multi-layer video decoder is capable of decoding a bitstream that comprises an encoded representation of the multi-layer video data. The number of triplet entries in the list is equal to a number of single-layer decoders in the multi-layer video decoder. Each respective triplet entry in the list of triplet entries indicates a profile, a tier, and a level for a respective single-layer decoder in the multi-layer video decoder. The multi-layer video decoder is configured such that, based on the multi-layer video decoder being capable of decoding the bitstream, the multi-layer video decoder decodes the bitstream.

Abstract translation: 多层视频解码器被配置为基于三元组条目的列表来确定多层视频解码器是否能够解码包括多层视频数据的编码表示的比特流。 列表中的三元组条目的数目等于多层视频解码器中的单层解码器的数量。 三重条目列表中的每个相应的三元组条目表示多层视频解码器中的相应单层解码器的简档，层和级别。 多层视频解码器被配置为使得基于能够对比特流进行解码的多层视频解码器，多层视频解码器对比特流进行解码。

公开(公告)号：US20150103920A1

公开(公告)日：2015-04-16

申请号：US14512199

申请日：2014-10-10

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Fnu Hendry

IPC: H04N19/37 ,  H04N19/70 ,  H04N19/91 ,  H04N19/436

CPC classification number: H04N19/37 ,  H04N19/30 ,  H04N19/436 ,  H04N19/70 ,  H04N19/91

Abstract: In an example, a method of decoding video data includes decoding, from a video parameter set (VPS) of a multi-layer bitstream, data that indicates at least one of a tile configuration for layers of the multi-layer bitstream or a parallel processing configuration for layers of the multi-layer bitstream. The method also includes decoding the multi-layer bitstream in accordance with the data decoded from the VPS.

Abstract translation: 在一个示例中，解码视频数据的方法包括从多层比特流的视频参数集（VPS）解码指示多层比特流的层的瓦片配置或并行处理中的至少一个的数据 配置多层比特流的层。 该方法还包括根据从VPS解码的数据对多层比特流进行解码。

公开(公告)号：US20150103902A1

公开(公告)日：2015-04-16

申请号：US14512177

申请日：2014-10-10

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Krishnakanth Rapaka ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N13/00 ,  H04N19/597

CPC classification number: H04N13/161 ,  H04N13/194 ,  H04N19/30 ,  H04N19/42 ,  H04N19/597

Abstract: Techniques are described for 3D lookup table based color gamut scalability in multi-layer video coding. A lower layer of video data may include color data in a first color gamut and a higher layer of the video data may include color data in a second color gamut. To generate inter-layer reference pictures, a video coder performs color prediction to convert the color data of a reference picture in the first color gamut to the second color gamut. The video coder may perform color prediction using a 3D lookup table. According to the techniques, the video coder generates at least one 3D lookup table having a size that is different for a luma component than for a first chroma component and a second chroma component. In this way, the total size of the table may be reduced while maintaining good coding performance.

Abstract translation: 在多层视频编码中描述了基于3D查找表的色域可伸缩性的技术。 视频数据的下层可以包括第一色域中的颜色数据，并且视频数据的较高层可以包括第二色域中的颜色数据。 为了产生层间参考图像，视频编码器执行颜色预测以将第一色域中的参考图像的颜色数据转换为第二色域。 视频编码器可以使用3D查找表来执行颜色预测。 根据该技术，视频编码器生成至少一个具有与亮度分量不同的尺寸的3D查找表，而不是第一色度分量和第二色度分量。 以这种方式，可以降低表的总大小，同时保持良好的编码性能。