公开(公告)号：US09654806B2

公开(公告)日：2017-05-16

申请号：US14667900

申请日：2015-03-25

Applicant: QUALCOMM Incorporated

Inventor： Feng Zou ,  Wei Pu ,  Rajan Laxman Joshi ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: H04N19/80 ,  H04N19/94

CPC classification number: H04N19/94 ,  H04N19/80

Abstract: Techniques are described for palette-based coding. In palette-based coding, a video coder may form a palette as a table of colors for representing video data of a given block. Palette-based coding may be useful for coding blocks of video data having a relatively small number of colors. Rather than coding actual pixel values or their residuals for the given block, the video coder may code index values for one or more of the pixels. The index values map the pixels to entries in the palette representing the colors of the pixels. Techniques are described for determining whether to disable filtering, such as deblocking filtering or sample adaptive offset (SAO) filtering, of palette coded blocks at a video encoder or a video decoder. Techniques are also described for modify a palette size and palette entries of a palette at the video encoder based on rate-distortion costs.

公开(公告)号：US09654777B2

公开(公告)日：2017-05-16

申请号：US14244711

申请日：2014-04-03

Applicant: QUALCOMM Incorporated

Inventor： Liwei Guo ,  Marta Karczewicz ,  Joel Sole Rojals ,  Rajan Laxman Joshi

IPC: H04N7/12 ,  H04N19/119 ,  H04N19/50 ,  H04N19/46 ,  H04N19/90 ,  H04N19/93

CPC classification number: H04N19/119 ,  H04N19/46 ,  H04N19/50 ,  H04N19/90 ,  H04N19/93

Abstract: In an example, a method of coding video data includes determining a first index value associated with a first pixel in a block of video data, wherein the first index value relates a position of the first pixel to an entry of a palette of pixel values, determining, based on the first index value, one or more second index values associated with one or more second pixels in the block of video data, wherein the second index values relate the positions of the one or more second pixels to one or more entries of the palette of pixel values, and coding the first pixel and the one or more second pixels of the block of video data.

公开(公告)号：US09648332B2

公开(公告)日：2017-05-09

申请号：US14524601

申请日：2014-10-27

Applicant: QUALCOMM Incorporated

Inventor： Woo-Shik Kim ,  Rajan Laxman Joshi ,  Wei Pu ,  Joel Sole Rojals ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/146 ,  H04N19/105 ,  H04N19/176 ,  H04N19/136

CPC classification number: H04N19/186 ,  H04N19/105 ,  H04N19/136 ,  H04N19/146 ,  H04N19/176

Abstract: A device for decoding video data includes a memory configured to store video data, and at least one processor. The at least one processor is configured to: determine a first bit-depth of luma residual samples for a block of video data, determine a second bit-depth of predicted chroma residual samples for the block of video data, adjust the luma residual samples based on the first bit-depth and the second bit-depth to produce bit-depth adjusted luma residual samples, determine chroma residual samples for the block of video data based on the bit-depth adjusted luma residual samples and the predicted chroma residual samples, and decode the block of video data based on the luma residual samples and the chroma residual samples.

公开(公告)号：US20170105023A1

公开(公告)日：2017-04-13

申请号：US15287007

申请日：2016-10-06

Applicant: QUALCOMM Incorporated

Inventor： Dileep Marchya ,  Mastan Manoj Kumar Amara Venkata ,  Ye-Kui Wang ,  Rajan Laxman Joshi ,  Sudeep Ravi Kottilingal

IPC: H04N19/55 ,  H04N19/17

CPC classification number: H04N19/55 ,  H04L65/607 ,  H04L65/608 ,  H04N19/107 ,  H04N19/137 ,  H04N19/162 ,  H04N19/167 ,  H04N19/17 ,  H04N19/46 ,  H04N19/503 ,  H04N19/61 ,  H04N19/70

Abstract: A device and method of decoding video data that includes decoding the video data to generate decoded video data of a current frame of the video data, and extracting an updated regions message from the decoded video data and determining updated region location information of the current frame based on the updated regions message. An updated region of the current frame is identified based on the updated region location information, the updated region being less than a total size of the current frame, and both the identified updated region and decoded video data of the current frame that has not been updated are transmitted for display of the current frame of the video data.

公开(公告)号：US20170034526A1

公开(公告)日：2017-02-02

申请号：US15219159

申请日：2016-07-25

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Rajan Laxman Joshi ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/174 ,  H04N19/105 ,  H04N19/159

CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/127 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/593

Abstract: Techniques and systems are provided for encoding video data. For example, restrictions on certain prediction modes can be applied for video coding. A restriction can be imposed that prevents inter-prediction bi-prediction from being performed on video data when certain conditions are met. For example, bi-prediction restriction can be based on whether intra-block copy prediction is enabled for one or more coding units or blocks of the video data, whether a value of a syntax element indicates that one or more motion vectors are in non-integer accuracy, whether both motion vectors of a bi-prediction block are in non-integer accuracy, whether the motion vectors of a bi-prediction block are not identical and/or are not from the same reference index, or any combination thereof. If one or more of these conditions are met, the restriction on bi-prediction can be applied, preventing bi-prediction from being performed on certain coding units or blocks.

Abstract translation: 提供了用于编码视频数据的技术和系统。 例如，对某些预测模式的限制可以应用于视频编码。 可以施加限制，其在满足某些条件时防止对视频数据执行帧间预测双预测。 例如，双预测限制可以基于是否对视频数据的一个或多个编码单元或块启用块内复制预测，语法元素的值是否指示一个或多个运动矢量处于非 - 整数精度，双预测块的两个运动矢量是否都是非整数精度，双预测块的运动矢量是否不相同和/或不是相同的参考索引，或其任何组合。 如果满足这些条件中的一个或多个，则可以应用对双预测的限制，防止对某些编码单元或块执行双重预测。

公开(公告)号：US09558567B2

公开(公告)日：2017-01-31

申请号：US14328502

申请日：2014-07-10

Applicant: QUALCOMM Incorporated

Inventor： Liwei Guo ,  Marta Karczewicz ,  Joel Sole Rojals ,  Rajan Laxman Joshi ,  Woo-Shik Kim ,  Wei Pu

IPC: H04N19/50 ,  G06T9/00 ,  H04N1/64 ,  H04N19/176 ,  H04N19/70 ,  H04N19/196 ,  H04N19/593 ,  H04N19/186 ,  H04N19/93 ,  H04N19/94 ,  H04N19/105

CPC classification number: G06T9/00 ,  H04N1/644 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/593 ,  H04N19/70 ,  H04N19/93 ,  H04N19/94

Abstract: In palette-based coding, a video coder may form a so-called “palette” as a table of colors representing the video data of a given block. The video coder may code index values for one or more pixels values of a current block of video data, where the index values indicate entries in the palette that represent the pixel values of the current block. According to the techniques, a video coder determines one or more palette entries in a predictive palette that are copied to the current palette, and a number of new palette entries not in the predictive palette that are included in the current palette. The video coder calculates a size of the current palette equal to the sum of the number of the copied palette entries and the number of the new palette entries, and generates the current palette including the copied palette entries and the new palette entries.

Abstract translation: 在基于调色板的编码中，视频编码器可以形成所谓的“调色板”，作为表示给定块的视频数据的颜色表。 视频编码器可以编码当前视频数据块的一个或多个像素值的索引值，其中索引值指示调色板中表示当前块的像素值的条目。 根据这些技术，视频编码器确定预测调色板中复制到当前调色板中的一个或多个调色板条目，以及不在预览调色板中的当前调色板中的多个新调色板条目。 视频编码器计算当前调色板的大小等于复制的调色板条目的数量和新调色板条目的数量的总和，并且生成包括复制的调色板条目和新调色板条目的当前调色板。

公开(公告)号：US20160345030A1

公开(公告)日：2016-11-24

申请号：US15158795

申请日：2016-05-19

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Feng Zou ,  Vadim Seregin ,  Wei Pu ,  Rajan Laxman Joshi

IPC: H04N19/91 ,  H04N19/172 ,  H04N19/186 ,  H04N19/124 ,  H04N19/187 ,  H04N19/70 ,  H04N19/176

CPC classification number: H04N19/91 ,  H04N19/124 ,  H04N19/13 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/187 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70

Abstract: A device for decoding video data is configured to determine, based on first entropy encoded data in the bitstream, a set of run-related syntax element groups for a current block of a current picture of the video data; determine, based on second entropy encoded data the bitstream, a set of palette index syntax elements for the current block, the first entropy encoded data occurring in the bitstream before the second entropy encoded data, wherein: each respective run-related syntax element group of the set of run-related syntax element groups indicates a respective type of a respective run of identical palette mode type indicators and a respective length of the respective run and each respective palette index syntax element of the set of palette index syntax elements indicates an entry in a palette comprising a set of sample values; and reconstruct, based on the sample values in the palette, the current block.

Abstract translation: 用于解码视频数据的设备被配置为基于比特流中的第一熵编码数据来确定视频数据的当前图片的当前块的一组运行相关语法元素组; 基于第二熵编码数据确定比特流，用于当前块的一组调色板索引语法元素，在第二熵编码数据之前在比特流中出现的第一熵编码数据，其中：每个相应的运行相关语法元素组 运行相关语法元素组的集合指示相同调色板模式类型指示符的相应运行的相应类型，并且相应运行的相应长度以及调色板索引语法元素组中的每个相应调色板索引语法元素指示 调色板，包括一组样本值; 并根据调色板中的样本值重建当前块。

公开(公告)号：US20160337661A1

公开(公告)日：2016-11-17

申请号：US15151416

申请日：2016-05-10

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Vadim Seregin ,  Marta Karczewicz ,  Rajan Laxman Joshi

IPC: H04N19/52 ,  H04N19/182 ,  H04N19/105 ,  H04N19/61

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/182 ,  H04N19/186 ,  H04N19/503 ,  H04N19/523 ,  H04N19/57 ,  H04N19/593 ,  H04N19/61

Abstract: An example method of encoding video data includes determining a resolution that will be used for a motion vector that identifies a predictor block in a current picture of video data for a current block in the current picture of video data; determining, based on the determined resolution, a search region for the current block such that a size of the search region is smaller where the resolution is fractional-pixel than where the resolution is integer-pixel; selecting, from within the search region, a predictor block for the current block; determining the motion vector that identifies the selected predictor block for the current block; and encoding, in a coded video bitstream, a representation of the motion vector.

Abstract translation: 编码视频数据的示例方法包括确定将用于识别视频数据的当前图像中的当前块的视频数据的当前图像中的预测块的运动矢量的分辨率; 基于所确定的分辨率，确定当前块的搜索区域，使得搜索区域的尺寸小于分辨率是分数像素而不是分辨率是整数像素的尺寸; 从搜索区域内选择当前块的预测块; 确定识别当前块的所选预测器块的运动矢量; 并且在编码视频比特流中对运动矢量的表示进行编码。

公开(公告)号：US20160227225A1

公开(公告)日：2016-08-04

申请号：US15009609

申请日：2016-01-28

Applicant: QUALCOMM Incorporated

Inventor： Feng Zou ,  Vadim Seregin ,  Marta Karczewicz ,  Wei Pu ,  Rajan Laxman Joshi

IPC: H04N19/186 ,  H04N19/593 ,  H04N19/124 ,  H04N19/44 ,  H04N19/13 ,  H04N19/577 ,  H04N19/105 ,  H04N19/147 ,  H04N19/61 ,  H04N19/176 ,  H04N19/139 ,  H04N19/52 ,  H04N19/96

CPC classification number: H04N19/186 ,  G06F9/30018 ,  H04N19/105 ,  H04N19/124 ,  H04N19/126 ,  H04N19/13 ,  H04N19/139 ,  H04N19/147 ,  H04N19/176 ,  H04N19/44 ,  H04N19/52 ,  H04N19/577 ,  H04N19/593 ,  H04N19/61 ,  H04N19/96

Abstract: In one example, a device for decoding video data includes a memory configured to store video data and a video decoder configured to determine that a value for a right shift parameter for an escape-mode coded pixel of a palette-mode coded block of the video data is less than zero, based on the value for the right shift parameter being less than zero, set a value for a left shift parameter to a positive value having an absolute value equal to an absolute value of the right shift parameter, and inverse quantize the escape-mode coded pixel using the value of the left shift parameter.

Abstract translation: 在一个示例中，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确定视频的调色板模式编码块的逃逸模式编码像素的右移参数的值的视频解码器 数据小于0，基于右移参数的值小于零，将左移参数的值设置为具有等于右移参数的绝对值的绝对值的正值，并将逆量化 逃逸模式编码像素使用左移参数的值。

公开(公告)号：US20160227217A1

公开(公告)日：2016-08-04

申请号：US15009477

申请日：2016-01-28

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Wei Pu ,  Rajan Laxman Joshi ,  Vadim Seregin

IPC: H04N19/13 ,  H04N19/186 ,  H04N19/44 ,  H04N19/593 ,  H04N19/124 ,  H04N19/117 ,  H04N19/105 ,  H04N19/52 ,  H04N19/176 ,  H04N19/136

CPC classification number: H04N19/13 ,  H04N19/105 ,  H04N19/117 ,  H04N19/124 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/42 ,  H04N19/44 ,  H04N19/463 ,  H04N19/52 ,  H04N19/593 ,  H04N19/70 ,  H04N19/93

Abstract: In an example, a method of decoding video data may include receiving a palette mode encoded block of video data of a picture. The method may include receiving encoded palette mode information for the palette mode encoded block of video data. The encoded palette mode information may include a plurality of instances of a first syntax element and a plurality of syntax elements that are different from the first syntax element. The method may include decoding, using bypass mode, the plurality of instances of the first syntax element before decoding the plurality of syntax elements that are different from the first syntax element using context mode. The method may include decoding, using context mode, the plurality of syntax elements that are different from the first syntax element after decoding the plurality of instances of the first syntax element using bypass mode.

Abstract translation: 在一个示例中，解码视频数据的方法可以包括接收图片的视频数据的调色板模式编码块。 该方法可以包括接收用于调色板模式编码的视频数据块的编码调色板模式信息。 编码调色板模式信息可以包括与第一语法元素不同的第一语法元素和多个语法元素的多个实例。 该方法可以包括在使用上下文模式解码与第一语法元素不同的多个语法元素之前，使用旁路模式来解码第一语法元素的多个实例。 该方法可以包括在使用旁路模式解码第一语法元素的多个实例之后，使用上下文模式来解码与第一语法元素不同的多个语法元素。