公开(公告)号：US09961174B2

公开(公告)日：2018-05-01

申请号：US14156329

申请日：2014-01-15

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Nakul Midha ,  Varun Radhakrishnan ,  Chulkyu Lee

IPC: H04M17/00 ,  H04M1/02 ,  H04B17/00 ,  H04L25/02 ,  H04L25/49 ,  G01R31/28

CPC classification number: H04M1/0266 ,  G01R31/2848 ,  H04B17/00 ,  H04L25/0272 ,  H04L25/4917

Abstract: System, methods and apparatus are described that model analog behavior in a multi-wire, multi-phase communications link. A digital signal representative of a physical connection in a communications link and a virtual signal characterizing a three-phase signal transmitted over the physical connection are generated. The virtual signal may be configured to model one or more analog characteristics of the physical connection. The analog characteristics may include voltage states defining the three-phase signal. The analog characteristics of the physical connection include at least three voltage states corresponding to signaling states of the three-phase signal.

公开(公告)号：US20180020241A1

公开(公告)日：2018-01-18

申请号：US15646959

申请日：2017-07-11

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Jianle Chen ,  Rajan Laxman Joshi ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/61 ,  H04N19/18 ,  H04N19/13 ,  H04N19/129 ,  H04N19/96 ,  H04N19/124

Abstract: A video decoder receives local quantization information for a current quantization group. The video decoder determines a partitioning of a coding tree unit (CTU) of a picture of the video data into a plurality of coding units (CUs). Additionally, the video decoder derives, based at least in part on the local quantization information for the current quantization group, a quantization parameter. The current quantization group is defined as a group of successive CUs so that boundaries of the current quantization group must be boundaries of the CUs. The current quantization group may or may not be square. Additionally, the video decoder inverse quantizes, based on the quantization parameter, at least one transform coefficient of a current CU being in the current quantization group. The video decoder reconstructs, based on inverse quantized transform coefficients of the current CU, a coding block of the current CU.

公开(公告)号：US09843801B2

公开(公告)日：2017-12-12

申请号：US13933588

申请日：2013-07-02

Applicant: QUALCOMM Incorporated

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

IPC: H04N11/04 ,  H04N7/12 ,  H04N11/02 ,  H04B1/66 ,  H04N19/51 ,  H04N13/00 ,  H04N19/597 ,  H04N19/105 ,  H04N19/187 ,  H04N19/33

CPC classification number: H04N13/161 ,  H04N19/105 ,  H04N19/187 ,  H04N19/33 ,  H04N19/597

Abstract: An apparatus for coding video information according to certain aspects includes a memory unit and a processor in communication with the memory unit. The memory unit stores video information of a reference layer. The processor determines a value of a video unit based at least in part on a prediction value and an adjusted residual prediction value associated with the reference layer. The adjusted residual prediction value is equal to a residual prediction from the reference layer multiplied by a weighting factor that is different from 1.

公开(公告)号：US20170318298A1

公开(公告)日：2017-11-02

申请号：US15654558

申请日：2017-07-19

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/136 ,  H04N19/42 ,  H04N19/30 ,  H04N19/186 ,  H04N19/124 ,  H04N19/70 ,  H04N19/105

CPC classification number: H04N19/136 ,  H04N19/105 ,  H04N19/124 ,  H04N19/186 ,  H04N19/30 ,  H04N19/42 ,  H04N19/70

Abstract: Techniques are described for signaling information used to generate three-dimensional (3D) color lookup tables for 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 encoder and/or video decoder 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, a video encoder may encode partition information and/or color values of a 3D lookup table generated for color gamut scalability. A video decoder may decode the partition information and/or color values to generate the 3D lookup table in order to perform color gamut scalability.

公开(公告)号：US09762920B2

公开(公告)日：2017-09-12

申请号：US14294913

申请日：2014-06-03

Applicant: QUALCOMM Incorporated

Inventor： Jianle Chen ,  Xiang Li ,  Wei Pu ,  Marta Karczewicz

IPC: H04N19/31 ,  H04N19/615 ,  H04N19/64 ,  H04N19/82 ,  H04N19/42 ,  H04N19/33

CPC classification number: H04N19/31 ,  H04N19/33 ,  H04N19/42 ,  H04N19/615 ,  H04N19/64 ,  H04N19/82

Abstract: An apparatus for coding video information according to certain aspects includes a memory and a processor. The memory unit is configured to store video information. The processor is configured to: obtain reference layer video information; upsample the reference layer video information in a first dimension to generate an intermediate output; constrain the intermediate output to a predetermined bit depth; and upsample the constrained intermediate output in a second dimension, wherein the second dimension is orthogonal to the first dimension.

公开(公告)号：US09756337B2

公开(公告)日：2017-09-05

申请号：US14572002

申请日：2014-12-16

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/136 ,  G06T7/40 ,  H04N19/50 ,  H04N19/124 ,  H04N19/44 ,  H04N19/137 ,  H04N19/30 ,  H04N19/186 ,  H04N19/42 ,  H04N19/105 ,  H04N19/70

CPC classification number: H04N19/136 ,  H04N19/105 ,  H04N19/124 ,  H04N19/186 ,  H04N19/30 ,  H04N19/42 ,  H04N19/70

Abstract: Techniques are described for signaling information used to generate three-dimensional (3D) color lookup tables for 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 encoder or video decoder performs color prediction using a 3D lookup table to convert the color data of a reference picture in the first color gamut to the second color gamut. According to the techniques, a video encoder may encode partition information and/or color values of a 3D lookup table generated for color gamut scalability. A video decoder may decode the partition information and/or color values to generate the 3D lookup table in order to perform color gamut scalability.

公开(公告)号：US09715559B2

公开(公告)日：2017-07-25

申请号：US14659398

申请日：2015-03-16

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Xiang Li ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: G06F17/30 ,  H04N19/105 ,  H04N19/46 ,  H04N19/30 ,  H04N19/593 ,  H04N19/136 ,  H04N19/18 ,  H04N19/597 ,  H04N19/52 ,  H04N19/11 ,  H04N19/33 ,  H04N19/31

CPC classification number: G06F17/30949 ,  G06F17/30958 ,  H04N19/105 ,  H04N19/11 ,  H04N19/136 ,  H04N19/18 ,  H04N19/30 ,  H04N19/31 ,  H04N19/33 ,  H04N19/46 ,  H04N19/52 ,  H04N19/593 ,  H04N19/597

Abstract: An apparatus configured to encode video information of a picture includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store a hash table that includes at least one hash index corresponding to reference blocks in the picture, the reference blocks being a subset of available blocks in the picture. The processor is configured to map a current block to a hash index in the hash table based on the application of a hash function to the current block, identify, from the hash table, reference blocks that correspond to the hash index, select a prediction block from among the reference blocks based on a comparison of the current block to the reference blocks, and encode the video information using the selected prediction block.

公开(公告)号：US20170150176A1

公开(公告)日：2017-05-25

申请号：US15359563

申请日：2016-11-22

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Jianle Chen ,  Wei-Jung Chien ,  Xin Zhao ,  Xiang Li ,  Marta Karczewicz

IPC: H04N19/59 ,  H04N19/186 ,  H04N19/573 ,  H04N19/61 ,  H04N19/91 ,  H04N19/587 ,  H04N19/124 ,  H04N19/13

CPC classification number: H04N19/649 ,  G06F17/147 ,  H04N19/105 ,  H04N19/119 ,  H04N19/122 ,  H04N19/124 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/42 ,  H04N19/573 ,  H04N19/587 ,  H04N19/59 ,  H04N19/593 ,  H04N19/597 ,  H04N19/61 ,  H04N19/625 ,  H04N19/82 ,  H04N19/91 ,  H04N19/96

Abstract: A video coder reconstructs a set of chroma reference samples and reconstructs luma samples of a non-square prediction unit. Additionally, the video coder sub-samples the set of luma reference samples such that a total number of the luma reference samples that neighbor a longer side of the non-square prediction block is the same as a total number of the luma reference samples that neighbor a shorter side of the non-square prediction block. The video coder determines a Linear Model (LM) parameter based on: β=(Σyi−α·Σxi)/I, where I is a total number of reference samples in the set of the luma reference samples, xi is a luma reference sample in the set of luma reference samples, yi is a chroma reference sample in the set of chroma reference samples. The video coder uses the LM parameter in a process to determine values of chroma samples of the non-square prediction block.

公开(公告)号：US09648318B2

公开(公告)日：2017-05-09

申请号：US14040290

申请日：2013-09-27

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/597 ,  H04N19/30 ,  H04N19/105 ,  H04N19/52 ,  H04N19/513

CPC classification number: H04N19/30 ,  H04N19/105 ,  H04N19/513 ,  H04N19/52 ,  H04N19/597

Abstract: In general, techniques are described for performing residual prediction in video coding. As one example, a device configured to code scalable or multi-view video data may comprise one or more processors configured to perform the techniques. The processors may determine a difference picture, for a current picture, based on a first reference picture in a same layer or view as the current picture and a decoded picture in a different layer or view as the current picture. The decoded picture may be in a same access unit as the first reference picture. The processors may perform bi-prediction based on the difference picture to code at least a portion of the current picture.

公开(公告)号：US09578339B2

公开(公告)日：2017-02-21

申请号：US14196508

申请日：2014-03-04

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Xiang Li ,  Jianle Chen ,  Ye-Kui Wang ,  Wei Pu

IPC: H04N19/436 ,  H04N19/33 ,  H04N19/17 ,  H04N19/50 ,  H04N19/503 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82

CPC classification number: H04N19/17 ,  H04N19/33 ,  H04N19/436 ,  H04N19/50 ,  H04N19/503 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82

Abstract: In one example, a device for coding video data includes a video coder configured to code a value for a syntax element representative of whether any two reference layer samples, collocated with two respective enhancement layer picture samples within a common enhancement layer tile, must be within a common reference layer tile, and code the enhancement layer picture samples based at least in part on the value of the syntax element.

Abstract translation: 在一个示例中，用于对视频数据进行编码的设备包括视频编码器，该视频编码器被配置为对语法元素的值进行编码，该语法元素表示是否在公共增强层瓦片内与两个相应的增强层图像样本并置的任何两个参考层样本必须在 公共参考层块，并且至少部分地基于语法元素的值来对增强层图像样本进行编码。