公开(公告)号：US20150382010A1

公开(公告)日：2015-12-31

申请号：US14750935

申请日：2015-06-25

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Marta Karczewicz ,  Chao Pang ,  Joel Sole Rojals

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/13

CPC classification number: H04N19/176 ,  H04N19/13 ,  H04N19/139 ,  H04N19/184 ,  H04N19/52

Abstract: A method for motion vector difference (MVD) coding of screen content video data is disclosed. In one aspect, the method includes determining an MVD between a predicted motion vector and a current motion vector and generating a binary string comprising n bins via binarizing the MVD. The method further includes determining whether an absolute value of the MVD is greater than a threshold value and encoding a subset of the n bins via an exponential Golomb code having an order that is greater than one in response to the absolute value of the MVD being greater than the threshold value.

Abstract translation: 公开了一种用于屏幕内容视频数据的运动矢量差（MVD）编码的方法。 一方面，该方法包括：通过二值化MVD，确定预测运动矢量与当前运动矢量之间的MVD，并产生包括n个箱的二进制串。 该方法还包括确定MVD的绝对值是否大于阈值，并且通过响应于MVD的绝对值更大的具有大于1的顺序的指数Golomb码对n个存储体的子集进行编码 超过阈值。

公开(公告)号：US20150373358A1

公开(公告)日：2015-12-24

申请号：US14743253

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/174 ,  H04N19/503 ,  H04N19/172

CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/109 ,  H04N19/159 ,  H04N19/174 ,  H04N19/593

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data including a plurality of pictures is described. The method includes performing intra-picture prediction on a block of one of the pictures to generate a prediction unit. Performing the intra-picture prediction includes selecting a reference block for intra-block copy prediction of a coding tree unit (CTU). The reference block is selected from a plurality of encoded blocks, and blocks within the CTU encoded with bi-prediction are excluded from selection as the reference block. Performing the intra-picture prediction further includes performing intra-block copy prediction with the selected reference block to generate the prediction unit. The method also includes generating syntax elements encoding the prediction unit based on the performed intra-picture prediction.

Abstract translation: 提供技术和系统用于对视频数据进行编码和解码。 例如，描述了对包括多个图像的视频数据进行编码的方法。 该方法包括对一幅图像的块执行画面内预测，以生成预测单元。 执行图像内预测包括选择用于编码树单元（CTU）的块内复制预测的参考块。 从多个编码块中选择参考块，并且将用双预测编码的CTU内的块从选择中排除为参考块。 执行图像内预测还包括利用所选择的参考块执行块内复制预测以生成预测单元。 该方法还包括基于所执行的图像内预测来生成编码预测单元的语法元素。

公开(公告)号：US20150373357A1

公开(公告)日：2015-12-24

申请号：US14743176

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/184 ,  H04N19/172 ,  H04N19/503 ,  H04N19/52

CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/109 ,  H04N19/159 ,  H04N19/174 ,  H04N19/593

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data includes obtaining video data at an encoder, and determining to perform intra-picture prediction on the video data, using intra-block copy prediction, to generate the plurality of encoded video pictures. The method also includes performing the intra-picture prediction on the video data using the intra-block copy prediction, and, in response to determining to perform the intra-picture prediction on the video data using the intra-block copy prediction, disabling at least one of inter-picture bi-prediction or inter-picture uni-prediction for the plurality of encoded video pictures. The method also includes generating the plurality of encoded video pictures based on the received video data according to the performed intra-block copy prediction.

Abstract translation: 提供技术和系统用于对视频数据进行编码和解码。 例如，编码视频数据的方法包括：在编码器处获得视频数据，并且使用块内复制预测确定对视频数据执行画面内预测，以生成多个编码视频图像。 该方法还包括使用块内复制预测对视频数据进行图像内预测，并且响应于使用块内复制预测确定对视频数据执行图像内预测，至少禁用 对于多个经编码的视频图像中的一个图像间预测或图像间预测。 该方法还包括根据所执行的块内复制预测，基于接收到的视频数据生成多个编码视频图像。

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：US20150358382A1

公开(公告)日：2015-12-10

申请号：US14741057

申请日：2015-06-16

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Marta Karczewicz

IPC: H04L29/06 ,  H04N19/70

CPC classification number: H04N21/8455 ,  G11B27/007 ,  G11B27/105 ,  G11B27/3027 ,  H04N19/70

Abstract: This disclosure describes techniques relevant to HTTP streaming of media data. According to these techniques, a server device may signal an open decoding refresh (ODR) random access point (RAP) for a movie segmentation of a movie representation. At least one frame of the media segmentation following the ODR RAP frame in decoding order may not be correctly decoded, and wherein each frame of the media segmentation following the ODR RAP frame in display order can be correctly decoded without relying on content of frames prior to the ODR RAP in display order. According to the techniques of this disclosure, a client device may communicate a request to a server device for the streaming of media data based on signaling of the ODR RAP. Also according to the techniques of this disclosure, a client device may commence decoding and/or playback of the movie representation based on signaling of the ODR RAP.

Abstract translation: 本公开描述了与媒体数据的HTTP流相关的技术。 根据这些技术，服务器设备可以发送用于电影表示的电影分割的开放解码刷新（ODR）随机接入点（RAP）。 以解码顺序在ODR RAP帧之后的媒体分段的至少一帧可能不能被正确解码，并且其中以显示顺序在ODR RAP帧之后的媒体分段的每个帧可以被正确地解码，而不依赖于帧之前的帧的内容 ODR RAP显示顺序。 根据本公开的技术，客户端设备可以基于ODR RAP的信令来向服务器设备传送媒体流媒体数据的请求。 还根据本公开的技术，客户端设备可以基于ODR RAP的信令开始解码和/或播放电影表示。

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：US09154787B2

公开(公告)日：2015-10-06

申请号：US13744128

申请日：2013-01-17

Applicant: Qualcomm Incorporated

Inventor： Sanjeev Kumar ,  Hsiao-Chiang Chuang ,  Shu Xiao ,  Kai Wang ,  Xianglin Wang ,  Wei-Jung Chien ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04N19/50 ,  H04N19/436 ,  H04N19/11 ,  H04N19/156 ,  H04N19/174

CPC classification number: H04N19/50 ,  H04N19/11 ,  H04N19/156 ,  H04N19/174 ,  H04N19/436

Abstract: The techniques of this disclosure are generally related to parallel coding of video units that reside along rows or columns of blocks in largest coding units. For example, the techniques include removing intra-prediction dependencies between two video units in different rows or columns to allow for parallel coding of rows or columns of the video units.

Abstract translation: 本公开的技术通常涉及以最大编码单元沿着行或列的行驻留的视频单元的并行编码。 例如，这些技术包括去除不同行或列中的两个视频单元之间的帧内预测依赖性，以允许视频单元的行或列的并行编码。

公开(公告)号：US20150271515A1

公开(公告)日：2015-09-24

申请号：US14592753

申请日：2015-01-08

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Ying Chen ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: H04N19/513

CPC classification number: H04N19/52 ,  H04N19/593 ,  H04N19/70

Abstract: In various aspects, this disclosure is directed to an example method for decoding video data. The example method includes determining candidate blocks for a block vector prediction process from a subset of candidate blocks used for an advanced motion vector prediction mode or a merge mode for motion vector prediction process; performing the block vector prediction process for a block of video data using the determined candidate blocks; and decoding the block of video data using intra block copy based on the block vector prediction process.

Abstract translation: 在各方面，本公开涉及用于解码视频数据的示例方法。 示例性方法包括从用于高级运动矢量预测模式的候选块的子集或用于运动矢量预测处​​理的合并模式确定用于块矢量预测处​​理的候选块; 使用所确定的候选块对视频数据块执行块向量预测处理; 以及基于块向量预测处理使用块内副本对视频数据块进行解码。