公开(公告)号：US20150117519A1

公开(公告)日：2015-04-30

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

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.

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以及至少一个处理器。 所述至少一个处理器被配置为：确定视频数据块的亮度残差样本的第一位深度，确定所述视频数据块的预测色度残差样本的第二位深度，基于所述视差数据块调整所述亮度残差样本 在第一位深度和第二位深度上，以产生位深度调整的亮度残差样本，基于比特深度调整的亮度残差样本和预测色残余样本，确定视频数据块的色度残差样本，以及 基于亮度残差样本和色度残差样本对视频数据块进行解码。

公开(公告)号：US20150071359A1

公开(公告)日：2015-03-12

申请号：US14021589

申请日：2013-09-09

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/60 ,  H04N19/91

CPC classification number: H04N19/91 ,  H04N19/129 ,  H04N19/13 ,  H04N19/18 ,  H04N19/60

Abstract: In some examples, a video coder employs a two-level technique to code information that identifies a position within the block of transform coefficients of one of the coefficients that is a last significant coefficient (LSC) for the block according to a scanning order associated with the block of transform coefficients. For example, a video coder may code a sub-block position that identifies a position of one of the sub-blocks that includes the LSC within the block, and code a coefficient position that identifies a position of the LSC within the sub-block that includes the LSC.

Abstract translation: 在一些示例中，视频编码器采用两级技术来编码信息，该信息根据与该数据块相关联的扫描顺序来识别作为块的最后有效系数（LSC）的一个系数的变换系数块内的位置 变换系数块。 例如，视频编码器可以对在块内标识包括LSC的子块之一的位置的子块位置进行编码，并对识别子块内的LSC的位置的系数位置进行编码， 包括LSC。

公开(公告)号：US20150071357A1

公开(公告)日：2015-03-12

申请号：US14484097

申请日：2014-09-11

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/593

CPC classification number: H04N19/593 ,  H04N19/563

Abstract: In general, techniques are described for coding a current video block within a current picture based on a predictor block within the current picture, the predictor block identified by a block vector. The techniques include identifying an unavailable pixel of the predictor block, obtaining a value for the unavailable pixel based on at least one neighboring reconstructed pixel of the unavailable pixel, and coding the current video block based on a version of the predictor block that includes the obtained value for the unavailable pixel. The unavailable pixel may be located outside of a reconstructed region of the current picture.

Abstract translation: 通常，描述了基于当前图片内的预测块来编码当前图像中的当前视频块的技术，即由块向量识别的预测块。 这些技术包括识别预测器块的不可用像素，基于不可用像素的至少一个相邻重建像素获得不可用像素的值，并且基于包含所获得的预测变量块的预测变量块的版本对当前视频块进行编码 不可用像素的值。 不可用像素可以位于当前图像的重构区域的外部。

公开(公告)号：US20150063454A1

公开(公告)日：2015-03-05

申请号：US14469477

申请日：2014-08-26

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/50 ,  H04N19/176

CPC classification number: H04N19/50 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: In an example, a method of decoding video data includes generating a residual block of a picture based on a predicted residual block including reconstructing one or more residual values of the residual block based on one or more predicted residual values of the residual block. The method also includes generating a current block of the picture based on a combination of the residual block and a prediction block of the picture.

Abstract translation: 在一个示例中，解码视频数据的方法包括基于预测的残差块生成残差块，所述预测残差块包括基于剩余块的一个或多个预测残差重建残余块的一个或多个剩余值。 该方法还包括基于剩余块和图像的预测块的组合来生成图像的当前块。

公开(公告)号：US20140286412A1

公开(公告)日：2014-09-25

申请号：US14223945

申请日：2014-03-24

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/593 ,  H04N19/65

CPC classification number: H04N19/467 ,  H04N19/436 ,  H04N19/593 ,  H04N19/70

Abstract: A video coder may generate a predictive block. As part of generating the predictive block, the video coder may use at least one of a losslessly reconstructed sample to left of a current sample in a current row of a predictive block and a losslessly reconstructed sample for a row of the predictive block above the current row for DC prediction of the current sample.

Abstract translation: 视频编码器可以生成预测块。 作为生成预测块的一部分，视频编码器可以使用在预测块的当前行中的当前样本的左侧的无损重建样本中的至少一个以及当前值之上的预测块的行的无损重建样本中的至少一个 行用于当前样本的直流预测。

公开(公告)号：US20130336395A1

公开(公告)日：2013-12-19

申请号：US13919936

申请日：2013-06-17

Applicant: Qualcomm Incorporated

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

IPC: H04N7/26

CPC classification number: H04N19/85 ,  H04N19/127 ,  H04N19/162 ,  H04N19/176 ,  H04N19/70 ,  H04N19/82

Abstract: Techniques described herein are related to harmonizing the signaling of coding modes and filtering in video coding. In one example, a method of decoding video data is provided that includes decoding a first syntax element to determine whether PCM coding mode is used for one or more video blocks, wherein the PCM coding mode refers to a mode that codes pixel values as PCM samples. The method further includes decoding a second syntax element to determine whether in-loop filtering is applied to the one or more video blocks. Responsive to the first syntax element indicating that the PCM coding mode is used, the method further includes applying in-loop filtering to the one or more video blocks based at least in part on the second syntax element and decoding the one or more video blocks based at least in part on the first and second syntax elements.

Abstract translation: 本文描述的技术涉及协调编码模式的信令和视频编码中的滤波。 在一个示例中，提供了解码视频数据的方法，其包括对第一语法元素进行解码以确定PCM编码模式是否用于一个或多个视频块，其中PCM编码模式是将像素值编码为PCM样本的模式 。 该方法还包括解码第二语法元素以确定是否将一个或多个视频块应用于环路滤波。 响应于指示使用PCM编码模式的第一语法元素，该方法还包括至少部分地基于第二语法元素对一个或多个视频块应用循环过滤，并且基于一个或多个视频块进行解码 至少部分地基于第一和第二语法元素。

公开(公告)号：US20130148718A1

公开(公告)日：2013-06-13

申请号：US13765040

申请日：2013-02-12

Applicant: Qualcomm Incorporated

Inventor： Yuriy Reznik ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/625 ,  G06F17/147 ,  H04N19/60

Abstract: In general, techniques are described for implementing an 8-point inverse discrete cosine transform (IDCT). An apparatus comprising an 8-point inverse discrete cosine transform (IDCT) hardware unit may implement these techniques to transform media data from a frequency domain to a spatial domain. The 8-point IDCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point IDCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third, fourth, fifth and sixth internal factors.

Abstract translation: 通常，描述了用于实现8点逆离散余弦变换（IDCT）的技术。 包括8点逆离散余弦变换（IDCT）硬件单元的装置可实施这些技术以将媒体数据从频域转换为空间域。 8点IDCT硬件单元包括与根据第一关系的第一缩放因子（mu）相关的因子A，B的偶数部分。 8点IDCT硬件单元还包括与根据第二关系的第二比例因子（eta）相关的第三，第四，第五和第六内部因素（G，D，E，Z）的奇数部分。 第一个关系将第一个缩放因子与第一个和第二个内部因素相关联。 第二个关系将第二个比例因素与第三个，第四个，第五个和第六个内部因素联系起来。

公开(公告)号：US20130107942A1

公开(公告)日：2013-05-02

申请号：US13664057

申请日：2012-10-30

Applicant: Qualcomm Incorporated

Inventor： Ying Chen ,  Ye-Kui Wang ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/66 ,  H04N19/463 ,  H04N19/70

Abstract: A video encoder generates a first network abstraction layer (NAL) unit. The first NAL unit contains a first fragment of a parameter set associated with video data. The video encoder also generates a second NAL unit. The second NAL unit contains a second fragment of the parameter set. A video decoder may receive a bitstream that includes the first and second NAL units. The video decoder decodes, based at least in part on the parameter set, one or more coded pictures of the video data.

Abstract translation: 视频编码器生成第一网络抽象层（NAL）单元。 第一个NAL单元包含与视频数据相关联的参数集的第一个片段。 视频编码器还产生第二NAL单元。 第二个NAL单元包含参数集的第二个片段。 视频解码器可以接收包括第一和第二NAL单元的比特流。 视频解码器至少部分地基于参数集来解码视频数据的一个或多个编码图像。

公开(公告)号：US11330297B2

公开(公告)日：2022-05-10

申请号：US14818134

申请日：2015-08-04

Applicant: QUALCOMM Incorporated

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

IPC: H04N7/12 ,  H04N19/593 ,  H04N19/27 ,  H04N19/93 ,  H04N19/105 ,  H04N19/159 ,  H04N19/167 ,  H04N19/182 ,  H04N19/186 ,  H04N19/85

Abstract: Methods incorporating extensions to copy-above mode for palette mode coding are disclosed. In one aspect, the method includes coding a current pixel of a current block of video data in copy-previous mode via coding a previous line index. The coding of the current pixel in copy-previous mode further including identifying a number of candidate values for the previous line index, identifying a number of escape pixels in a column of pixels above the current pixel in the current block, and reducing a number of candidate values of the previous line index by the number of identified escape pixels.

公开(公告)号：US20200267390A1

公开(公告)日：2020-08-20

申请号：US16867294

申请日：2020-05-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/136 ,  H04N19/93 ,  H04N19/186 ,  H04N19/463 ,  H04N19/129 ,  H04N19/70 ,  H04N19/182 ,  H04N19/44 ,  H04N19/176

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.