公开(公告)号：US20140003529A1

公开(公告)日：2014-01-02

申请号：US13929287

申请日：2013-06-27

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman JOSHI ,  Joel SOLE ROJALS ,  Marta KARCZEWICZ

IPC: H04N7/30

CPC classification number: H04N19/60 ,  H04N19/13 ,  H04N19/18 ,  H04N19/463

Abstract: A video coder determines, based at least in part on a distance between a current sub-block of a transform coefficient block and a sub-block that contains a last significant coefficient (LSC) of the transform coefficient block, coding contexts for significance flags for transform coefficients of the current sub-block. Furthermore, the video coder entropy codes, based on the coding contexts for the significance flags for the transform coefficients of the current sub-block, the significance flags for the transform coefficients of the current sub-block.

Abstract translation: 视频编码器至少部分地基于变换系数块的当前子块与包含变换系数块的最后有效系数（LSC）的子块之间的距离来确定用于显示标志的编码上下文 变换当前子块的系数。 此外，视频编码器基于当前子块的变换系数的有效标志的编码上下文，对当前子块的变换系数的有效标志进行熵编码。

公开(公告)号：US20130272414A1

公开(公告)日：2013-10-17

申请号：US13861319

申请日：2013-04-11

Applicant: QUALCOMM INCORPORATED

Inventor： Joel SOLE ROJALS ,  Rajan Laxman JOSHI ,  Wei-Jung CHIEN ,  Jianle CHEN ,  Vadim SEREGIN ,  Marta KARCZEWICZ

IPC: H04N7/50

CPC classification number: H04N19/615 ,  H04N19/13 ,  H04N19/14 ,  H04N19/18 ,  H04N19/70

Abstract: A method of decoding data indicative of a subset of transform coefficients is described. The coefficients are indicative of a block of video data. The method may include determining that no transform coefficient in the subset of transform coefficients has an absolute value greater than one, and, based on the determining, skipping one or more decoding passes on the subset of transform coefficients, the decoding passes relating to decoding level information associated with the subset of transform coefficients.

Abstract translation: 描述了一种解码表示变换系数子集的数据的方法。 系数表示视频数据块。 该方法可以包括确定变换系数的子集中的变换系数不具有大于1的绝对值，并且基于确定，跳过变换系数子集上的一个或多个解码通过，与解码级相关的解码通过 与变换系数子集相关联的信息。

公开(公告)号：US20150304668A1

公开(公告)日：2015-10-22

申请号：US14691376

申请日：2015-04-20

Applicant: QUALCOMM Incorporated

Inventor： Natan Haim JACOBSON ,  Vijayaraghavan THIRUMALAI ,  Rajan Laxman JOSHI ,  Min DAI

IPC: H04N19/196 ,  H04N19/167

CPC classification number: H04N19/196 ,  H04N19/167 ,  H04N19/593 ,  H04N19/94

Abstract: A system and method for coding video data in pattern mode for display stream compression (DSC) is disclosed. In one aspect, the method includes determining that a first pattern in a current block of video data is not in a pattern database comprising a plurality of patterns, and adding the first pattern to the pattern database. The first pattern may be associated with a first index identifying a location of the first pattern in the pattern database. The method further includes coding the current block in pattern mode at least in part via signaling (i) the first pattern determined not to be in the pattern database and (ii) the first index identifying the location of the first pattern in the first database.

Abstract translation: 公开了一种用于以图形模式对显示流压缩（DSC）编码视频数据的系统和方法。 一方面，该方法包括确定视频数据的当前块中的第一模式不在包括多个模式的模式数据库中，并将第一模式添加到模式数据库。 第一图案可以与识别图案数据库中的第一图案的位置的第一索引相关联。 该方法还包括至少部分通过信令（i）确定不在模式数据库中的第一模式和（ii）识别第一模式在第一数据库中的位置的第一索引，以模式模式对当前块进行编码。

公开(公告)号：US20140092965A1

公开(公告)日：2014-04-03

申请号：US14038536

申请日：2013-09-26

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman JOSHI ,  Liwei GUO ,  Marta KARCZEWICZ

IPC: H04N7/34 ,  H04N7/26

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/645 ,  H04N19/70 ,  H04N19/96

Abstract: Systems, methods, and devices for video coding that may receive a rectangular chroma block are disclosed. The rectangular chroma block may be divided into a first square sub-block and a second square sub-block. The systems, methods, and devices may reconstruct the first square sub-block and intra-predict the second square sub-block using reference samples from the reconstructed first square sub-block.

Abstract translation: 公开了可以接收矩形色度块的用于视频编码的系统，方法和设备。 矩形色度块可以被划分为第一平方子块和第二平方子块。 系统，方法和设备可以使用来自重建的第一平方子块的参考样本来重构第一平方子块并且对第二平方子块进行内预测。

公开(公告)号：US20140016698A1

公开(公告)日：2014-01-16

申请号：US13939037

申请日：2013-07-10

Applicant: Qualcomm Incorporated

Inventor： Rajan Laxman JOSHI ,  Marta KARCZEWICZ

IPC: H04N7/50

CPC classification number: H04N19/61 ,  H04N19/129 ,  H04N19/14 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/88

Abstract: Techniques are described for coding residual data of a prediction residual block with transform skipping. A transform may be skipped for a residual block when the residual block is coded using either a lossless coding mode or a lossy coding mode in a transform skip mode. According to the techniques, based on a transform being skipped for a residual block, a rotation unit included in a video encoder or a video decoder determines whether to rotate the residual block prior to coding residual data of the residual block. In some examples, a rotation value may be explicitly signaled between the video encoder and the video decoder. In other examples, the video encoder and the video decoder may each independently determine whether to rotate the residual block based on a type of boundary at two or more edges of the residual block.

Abstract translation: 描述了用于利用变换跳过对预测残差块的残差数据进行编码的技术。 当在变换跳过模式中使用无损编码模式或有损编码模式对残差块进行编码时，可以跳过残差块的变换。 根据该技术，基于对于残差块跳过的变换，包括在视频编码器或视频解码器中的旋转单元确定在编码残差块的残差数据之前是否旋转残差块。 在一些示例中，旋转值可以在视频编码器和视频解码器之间明确地发出信号。 在其他示例中，视频编码器和视频解码器可以各自独立地基于残差块的两个或多个边缘处的边界类型来独立地确定是否旋转剩余块。

公开(公告)号：US20130294524A1

公开(公告)日：2013-11-07

申请号：US13886210

申请日：2013-05-02

Applicant: QUALCOMM INCORPORATED

Inventor： Geert VAN DER AUWERA ,  Marta KARCZEWICZ ,  Rajan Laxman JOSHI ,  Vadim SEREGIN

IPC: H04N7/30

CPC classification number: H04N19/176 ,  H04N19/60 ,  H04N19/70

Abstract: An example method includes determining whether an encoded block of residual video data was encoded losslessly in accordance with a lossless coding mode, based on whether transform operations were skipped during encoding of the block of residual video data, and if the block of residual video data was encoded losslessly, then decoding the encoded block of residual video data according to the lossless coding mode to form a reconstructed block of residual video data, where decoding the encoded block of residual data comprises bypassing quantization and sign hiding while decoding the encoded block of residual video data, and bypassing all loop filters with respect to the reconstructed block of residual video data.

Abstract translation: 一种示例性方法包括：基于在编码残差视频数据块期间是否跳过了变换操作，确定剩余视频数据的编码块是否根据无损编码模式无损编码，并且如果剩余视频数据块是 无损地编码，然后根据无损编码模式解码残余视频数据的编码块，以形成残余视频数据的重建块，其中对编码的残留数据块进行解码包括绕过量化和符号隐藏，同时对编码的残留视频块进行解码 数据和绕过所有环路滤波器相对于重构的残留视频数据块。

公开(公告)号：US20130272423A1

公开(公告)日：2013-10-17

申请号：US13862818

申请日：2013-04-15

Applicant: QUALCOMM INCORPORATED

Inventor： Wei-Jung CHIEN ,  Joel SOLE ROJALS ,  Jianle CHEN ,  Rajan Laxman JOSHI ,  Marta KARCZEWICZ

IPC: H04N7/30

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 determining a scan order for transform coefficients of a block. The techniques may determine context for encoding or decoding significance syntax elements for the transform coefficients based on the determined scan order. A video encoder may encode the significance syntax elements and a video decoder may decode the significance syntax elements based on the determined contexts.

Abstract translation: 描述了用于确定块的变换系数的扫描顺序的技术。 这些技术可以基于所确定的扫描顺序来确定用于对变换系数的重要性语法元素进行编码或解码的上下文。 视频编码器可以对重要性语法元素进行编码，并且视频解码器可以基于所确定的上下文来解码重要语法元素。

公开(公告)号：US20130272378A1

公开(公告)日：2013-10-17

申请号：US13832909

申请日：2013-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： Joel SOLE ROJALS ,  Rajan Laxman JOSHI ,  Marta KARCZEWICZ

IPC: H04N7/12

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。