公开(公告)号：US20160100168A1

公开(公告)日：2016-04-07

申请号：US14876594

申请日：2015-10-06

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Li Zhang ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/60 ,  H04N19/44

CPC classification number: H04N19/124 ,  H04N19/12 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/44 ,  H04N19/60 ,  H05K999/99

Abstract: A device for decoding video data is configured to determine, based on a chroma sampling format for the video data, that adaptive color transform is enabled for one or more blocks of the video data; determine a quantization parameter for the one or more blocks based on determining that the adaptive color transform is enabled; and dequantize transform coefficients based on the determined quantization parameter. A device for decoding video data is configured to determine for one or more blocks of the video data that adaptive color transform is enabled; receive in a picture parameter set, one or more offset values in response to adaptive color transform being enabled; determine a quantization parameter for a first color component of a first color space based on a first of the one or more offset values; and dequantize transform coefficients based on the quantization parameter.

Abstract translation: 用于解码视频数据的设备被配置为基于视频数据的色度采样格式来确定对于视频数据的一个或多个块启用自适应颜色变换; 基于确定所述自适应颜色变换被启用来确定所述一个或多个块的量化参数; 并且基于所确定的量化参数去量化变换系数。 用于对视频数据进行解码的设备被配置为为视频数据的一个或多个块确定自适应颜色变换被启用; 在图像参数集中接收响应于自适应颜色变换被启用的一个或多个偏移值; 基于所述一个或多个偏移值中的第一个来确定第一颜色空间的第一颜色分量的量化参数; 并基于量化参数去量化变换系数。

公开(公告)号：US20160100167A1

公开(公告)日：2016-04-07

申请号：US14876574

申请日：2015-10-06

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Li Zhang ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/44 ,  H04N19/18 ,  H04N19/186

CPC classification number: H04N19/124 ,  H04N19/12 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/44 ,  H04N19/60 ,  H05K999/99

Abstract: A device for decoding video data is configured to determine for one or more blocks of the video data that adaptive color transform is enabled; determine a quantization parameter for the one or more blocks; in response to a value of the quantization parameter being below a threshold, modify the quantization parameter to determine a modified quantization parameter; and dequantize transform coefficients based on the modified quantization parameter.

Abstract translation: 用于对视频数据进行解码的设备被配置为为视频数据的一个或多个块确定自适应颜色变换被启用; 确定所述一个或多个块的量化参数; 响应于所述量化参数的值低于阈值，修改所述量化参数以确定修改的量化参数; 并且基于修改的量化参数去量化变换系数。

公开(公告)号：US20160044317A1

公开(公告)日：2016-02-11

申请号：US14820404

申请日：2015-08-06

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/152 ,  H04N19/176 ,  H04N19/119

CPC classification number: H04N19/152 ,  H04N19/119 ,  H04N19/124 ,  H04N19/174 ,  H04N19/176

Abstract: A system and method for display stream compression is disclosed. In one example, there is provided a method that includes coding a block within a slice of video data. The slice may comprise one or more blocks of the video data. The method further includes storing bits corresponding to the block in a buffer, determining information indicative of a position of the block within the slice, and determining fullness of the buffer based at least in part on the position of the block within the slice.

Abstract translation: 公开了用于显示流压缩的系统和方法。 在一个示例中，提供了一种方法，其包括对视频数据片段内的块进行编码。 切片可以包括视频数据的一个或多个块。 该方法还包括将对应于该块的比特存储在缓冲器中，确定指示切片内的块的位置的信息，以及至少部分地基于该切片内的块的位置确定该缓冲器的丰满度。

公开(公告)号：US20160037164A1

公开(公告)日：2016-02-04

申请号：US14816980

申请日：2015-08-03

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/136 ,  H04N19/70 ,  H04N19/182 ,  H04N19/176 ,  H04N19/44

Abstract: In an example, a method of processing video data may include inferring a pixel scan order for a first palette mode encoded block of video data without receiving a block-level syntax element having a value representative of the pixel scan order for the first palette mode encoded block. The method may include decoding the first palette mode encoded block of video data using the inferred pixel scan order. The method may include receiving a block-level syntax element having a value representative of a pixel scan order for a second palette mode encoded block of video data. The method may include determining the pixel scan order for the second palette mode encoded block of video data based on the received block-level syntax element. The method may include decoding the second palette mode encoded block of video data using the determined pixel scan order.

Abstract translation: 在一个示例中，处理视频数据的方法可以包括推断用于第一调色板模式编码的视频数据块的像素扫描顺序，而不接收具有表示第一调色板模式编码的像素扫描顺序的值的块级语法元素 块。 该方法可以包括使用推测的像素扫描顺序来解码第一调色板模式编码的视频数据块。 该方法可以包括接收具有代表视频数据的第二调色板模式编码块的像素扫描顺序的值的块级语法元素。 该方法可以包括基于接收的块级语法元素确定第二调色板模式编码的视频数据块的像素扫描顺序。 该方法可以包括使用确定的像素扫描顺序来解码第二调色板模式编码的视频数据块。

公开(公告)号：US20150373339A1

公开(公告)日：2015-12-24

申请号：US14743898

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/176 ,  H04N19/587 ,  H04N19/593 ,  H04N19/93 ,  H04N19/105 ,  H04N19/186

CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/119 ,  H04N19/182 ,  H04N19/186 ,  H04N19/48 ,  H04N19/587 ,  H04N19/593 ,  H04N19/70 ,  H04N19/93

Abstract: An example method of decoding video data includes determining a palette for decoding a block of video data, where the palette includes one or more palette entries each having a respective palette index, determining a first plurality of palette indices for first pixels of the block of video data, enabling a palette coding mode based on a run length of a run of a second plurality of palette indices for second pixels of the block of video data being decoded relative to the first plurality of palette indices meeting a run length threshold, and decoding the run of the second plurality of palette indices relative to the first plurality of palette indices using the palette coding mode.

Abstract translation: 解码视频数据的示例性方法包括确定用于解码视频数据块的调色板，其中调色板包括一个或多个调色板条目，每个调色板条目具有相应的调色板索引，确定视频块的第一像素的第一多个调色板索引 数据，基于针对视频数据块的第二像素的第二多个调色板索引的游程的游程长度相对于满足游程长度阈值的第一多个调色板索引进行解码，启用调色板编码模式，以及对 使用调色板编码模式相对于第一多个调色板索引运行第二多个调色板索引。

公开(公告)号：US09191670B2

公开(公告)日：2015-11-17

申请号：US13710212

申请日：2012-12-10

Applicant: Qualcomm Incorporated

Inventor： Marta Karczewicz ,  Jianle Chen ,  Wei-Jung Chien ,  Rajan Laxman Joshi

IPC: H04N19/64 ,  H04N19/91 ,  H04N19/60 ,  H04N19/70 ,  H04N19/13 ,  H04N19/93

CPC classification number: H04N19/00775 ,  H04N19/13 ,  H04N19/60 ,  H04N19/70

Abstract: This disclosure proposes various techniques for limiting the number of bins that are coded using an adaptive context model with context adaptive binary arithmetic coding (CABAC). In particular, this disclosure proposes to limit the number of bins that use CABAC for coding level information of transform coefficients in a video coding process.

Abstract translation: 本公开提出了用于限制使用具有上下文自适应二进制算术编码（CABAC）的自适应上下文模型编码的分组数的各种技术。 特别地，本发明提出限制在视频编码处理中使用CABAC对于变换系数的编码电平信息的信道数。

公开(公告)号：US09185404B2

公开(公告)日：2015-11-10

申请号：US13645345

申请日：2012-10-04

Applicant: Qualcomm Incorporated

Inventor： Geert Van der Auwera ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N19/96 ,  H04N19/126 ,  H04N19/70 ,  H04N19/86

CPC classification number: H04N19/00096 ,  H04N19/126 ,  H04N19/70 ,  H04N19/86

Abstract: In general, techniques are described for performing transform dependent de-blocking filtering, which may be implemented by a video encoding device. The video encoding device may apply a transform to a video data block to generate a block of transform coefficients, apply a quantization parameter to quantize the transform coefficients and reconstruct the block of video data from the quantized transform coefficients. The video encoding device may further determine at least one offset used in controlling de-blocking filtering based on the size of the applied transform, and perform de-blocking filtering on the reconstructed block of video data based on the determined offset. Additionally, the video encoder may specify a flag in a picture parameter set (PPS) that indicates whether the offset is specified in one or both of the PPS and a header of an independently decodable unit.

Abstract translation: 通常，描述用于执行变换相关的去块滤波的技术，其可以由视频编码设备来实现。 视频编码装置可以向视频数据块应用变换以产生变换系数块，应用量化参数来量化变换系数并从量化变换系数重构视频数据块。 视频编码装置还可以基于所应用的变换的大小进一步确定用于控制解块滤波的至少一个偏移，并且基于所确定的偏移对重建的视频数据块执行解块滤波。 此外，视频编码器可以指定图像参数集（PPS）中的标志，其指示是否在PPS中的一个或两个中指定了偏移量，以及独立可解码单元的报头。

公开(公告)号：US09154792B2

公开(公告)日：2015-10-06

申请号：US13669032

申请日：2012-11-05

Applicant: Qualcomm Incorporated

Inventor： Wei-Jung Chien ,  Joel Sole Rojals ,  Marta Karczewicz ,  Rajan Laxman Joshi

IPC: H04N7/26 ,  H04N19/88 ,  H03M7/40 ,  H04N19/70 ,  H04N19/13 ,  H04N19/463 ,  H04N19/18

CPC classification number: H04N19/88 ,  H03M7/4018 ,  H03M7/4037 ,  H04N19/13 ,  H04N19/18 ,  H04N19/463 ,  H04N19/70

Abstract: A video encoder is configured to determine a first and second binary string for a value indicating the position of the last significant coefficient, within a video block of size T. A video decoder is configured to determine a value indicating the position of a last significant coefficient within a video block of size T based on a first and second binary string. In one example, the first binary string is based on a truncated unary coding scheme defined by a maximum bit length defined by 2 log2(T)−1 and the second binary string is based on a fixed length coding scheme defined by a maximum bit length defined by log2(T)−2.

Abstract translation: 视频编码器被配置为在大小为T的视频块内确定用于指示最后有效系数的位置的值的第一和第二二进制串。视频解码器被配置为确定指示最后有效系数的位置的值 在基于第一和第二二进制串的大小为T的视频块内。 在一个示例中，第一二进制串基于由2log2（T）-1定义的最大位长定义的截断的一元编码方案，第二二进制串基于由最大位长度定义的固定长度编码方案 由log2（T）-2定义。

公开(公告)号：US09124872B2

公开(公告)日：2015-09-01

申请号：US13832909

申请日：2013-03-15

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/60 ,  H04N19/176 ,  H04N19/13 ,  H04N19/129 ,  H04N19/102 ,  H04N19/18 ,  H04N19/167 ,  H03M7/40

CPC classification number: H04N19/60 ,  H03M7/40 ,  H03M7/4018 ,  H04N19/102 ,  H04N19/129 ,  H04N19/13 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18

Abstract: Techniques are described for a video coder (e.g., video encoder or video decoder) that is configured to select a context pattern from a plurality of context patterns that are the same for a plurality of scan types. Techniques are also described for a video coder that is configured to select a context pattern that is stored as a one-dimensional context pattern and identifies contexts for two or more scan types.

Abstract translation: 描述了用于视频编码器（例如，视频编码器或视频解码器）的技术，其被配置为从多个扫描类型相同的多个上下文模式中选择上下文模式。 还描述了用于视频编码器的技术，其被配置为选择作为一维上下文模式存储的上下文模式并且识别两种或更多种扫描类型的上下文。

公开(公告)号：US20150189302A1

公开(公告)日：2015-07-02

申请号：US14586805

申请日：2014-12-30

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/44 ,  H04N19/93 ,  H04N19/597

CPC classification number: H04N19/583 ,  H04N19/124 ,  H04N19/127 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/593 ,  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. A method includes determining a number of entries in a palette, and determining whether a block of video data includes any escape pixels not associated with any entry in the palette. The method includes responsive to determining that the number of entries is one, and that the block does not include any escape pixels, bypassing decoding index values for the pixel values of the block, and determining the pixel values of the block to be equal to the one entry in the palette.

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。 一种方法包括确定调色板中的条目数，以及确定视频数据块是否包括与调色板中的任何条目不相关联的任何转义像素。 该方法包括响应于确定条目的数量是一个，并且块不包括任何逃逸像素，绕过块的像素值的解码索引值，并且确定块的像素值等于 调色板中的一个条目。