公开(公告)号：US09762904B2

公开(公告)日：2017-09-12

申请号：US13709555

申请日：2012-12-10

Applicant: Qualcomm Incorporated

Inventor： Jianle Chen ,  Muhammed Zeyd Coban ,  Ye-Kui Wang ,  Xianglin Wang ,  Marta Karczewicz ,  Wei-Jung Chien

IPC: H04N19/51 ,  H04N19/196 ,  H04N19/52 ,  H04N19/70 ,  H04N19/463

CPC classification number: H04N19/463 ,  H04N19/196 ,  H04N19/197 ,  H04N19/52 ,  H04N19/70

Abstract: In general, techniques are described for performing motion vector prediction for video coding. A video coding device comprising a processor may perform the techniques. The processor may be configured to determine a plurality of candidate motion vectors for a current block of the video data so as to perform the motion vector prediction process and scale one or more of the plurality of candidate motion vectors determined for the current block of the video data to generate one or more scaled candidate motion vectors. The processor may then be configured to modify the scaled candidate motion vectors to be within a specified range.

公开(公告)号：US20170238015A1

公开(公告)日：2017-08-17

申请号：US15486156

申请日：2017-04-12

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Muhammed Zeyd Coban ,  Peisong Chen ,  Hsiao-Chiang Chuang ,  Rajan Laxman Joshi

IPC: H04N19/61 ,  H04N19/11 ,  H04N19/122 ,  H04N19/129 ,  H04N19/96 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/194 ,  H04N19/13

CPC classification number: H04N19/61 ,  H04N19/11 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/132 ,  H04N19/14 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/194 ,  H04N19/196 ,  H04N19/46 ,  H04N19/593 ,  H04N19/60 ,  H04N19/85 ,  H04N19/96

Abstract: In one example, an apparatus for encoding video data includes a video encoder configured to select an intra-prediction mode to use to encode a block of video data, determine whether the block includes a sub-block of a size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, when the block includes the sub-block of the size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, select one of the multiple possible transforms, transform the sub-block using the selected one of the multiple possible transforms, and provide an indication of the selected one of the multiple possible transforms for the size of the block.

公开(公告)号：US09538172B2

公开(公告)日：2017-01-03

申请号：US13839855

申请日：2013-03-15

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Jianle Chen ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N7/26 ,  H04N19/103 ,  H04N21/236 ,  H04N19/70 ,  H04N19/61 ,  H04N19/463 ,  H04N19/91 ,  H04N19/13 ,  H04N19/107

CPC classification number: H04N19/103 ,  H04N19/107 ,  H04N19/13 ,  H04N19/463 ,  H04N19/61 ,  H04N19/70 ,  H04N19/91 ,  H04N21/236

Abstract: A video encoding device is configured to generate a first group of syntax elements. Each syntax element in the first group indicates whether a prediction mode of a respective prediction unit (PU) is based on an index into a list of most probable modes. A second group of syntax elements is generated that correspond to respective syntax elements in the first group. The syntax elements in the second group identify either an index into the list of most probable modes or an intra-prediction mode. The first group of syntax elements are context adaptive binary arithmetic coding (CABAC) encoded, and the second group of syntax elements are bypass encoded. A video decoder is configured to receive the entropy encoded first and second groups of syntax elements. The video decoder CABAC decodes the first group of flags and bypass decodes the second group of flags.

Abstract translation: 视频编码设备被配置为生成第一组语法元素。 第一组中的每个语法元素指示相应预测单元（PU）的预测模式是否基于最可能模式列表中的索引。 生成与第一组中的相应语法元素对应的第二组语法元素。 第二组中的语法元素标识最可能模式列表中的索引或帧内预测模式。 第一组语法元素是上下文自适应二进制算术编码（CABAC）编码，第二组语法元素被旁路编码。 视频解码器被配置为接收熵编码的第一和第二组语法元素。 视频解码器CABAC对第一组标志进行解码，并对第二组标志进行旁路解码。

公开(公告)号：US20160037128A1

公开(公告)日：2016-02-04

申请号：US14811491

申请日：2015-07-28

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Marta Karczewicz ,  Nikolai Konrad Leung

IPC: H04N7/15 ,  H04N19/40 ,  H04N21/434 ,  H04N21/2662 ,  H04N21/2365 ,  H04N7/14 ,  H04N19/61

CPC classification number: H04N7/147 ,  H04L43/0852 ,  H04L43/0864 ,  H04L43/0894 ,  H04L43/106 ,  H04L43/16 ,  H04L47/12 ,  H04L47/2416 ,  H04L47/263 ,  H04L47/283 ,  H04N7/148 ,  H04N7/15 ,  H04N7/152 ,  H04N19/40 ,  H04N19/61 ,  H04N21/2365 ,  H04N21/23655 ,  H04N21/2662 ,  H04N21/4347 ,  Y02D50/10

Abstract: In an example, a method of processing data includes transmitting data over a network at a first bit rate, identifying a reduction in a network link rate of the network from a first network link rate to a second network link rate, and in response to identifying the reduction in the network link rate, determining a recovery bit rate at which to transmit the data over the network, where the recovery bit rate is less than the second network link rate. The method also includes determining a buffering duration based on a difference between a time of the identification of the reduction in the network link rate and an estimated actual time of the reduction in the network link rate, and determining a recovery rate duration during which to transmit the data at the recovery bit rate based on the recovery bit rate and the buffering duration.

Abstract translation: 在一个示例中，处理数据的方法包括以第一比特率通过网络发送数据，识别网络的网络链路速率从第一网络链路速率降低到第二网络链路速率，以及响应于识别 网络链路速率的降低，确定通过网络发送数据的恢复比特率，恢复比特率小于第二网络链路速率。 该方法还包括基于网络链路速率降低的识别时间与网络链路速率降低的估计实际时间之间的差异来确定缓冲持续时间，以及确定在其中发送的恢复速率持续时间 基于恢复比特率和缓冲持续时间的恢复比特率的数据。

公开(公告)号：US20130272386A1

公开(公告)日：2013-10-17

申请号：US13800268

申请日：2013-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Yang Yu ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/126 ,  H04N19/147 ,  H04N19/149 ,  H04N19/172 ,  H04N19/18

Abstract: A computing device, such as a video encoder, uses respective positions of respective coefficients in a coefficient block to look up, in a lookup table, respective quantization offsets for the respective coefficients. Furthermore, the computing device determines, based at least in part on the quantization offsets for the one or more coefficients, respective quantized levels for the respective coefficients.

Abstract translation: 诸如视频编码器的计算设备使用系数块中的各个系数的相应位置在查找表中查找各个系数的相应的量化偏移。 此外，计算设备至少部分地基于一个或多个系数的量化偏移来确定各个系数的相应量化电平。

公开(公告)号：US20130272385A1

公开(公告)日：2013-10-17

申请号：US13800155

申请日：2013-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Yang Yu ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/126 ,  H04N19/147 ,  H04N19/149 ,  H04N19/172 ,  H04N19/18

Abstract: A computing device, such as a video encoder, determines an initial quantized level for a coefficient of a coefficient block and determines whether the coefficient is less than the product of the initial quantized level and a quantization step size value. In response to determining that the coefficient is less than the product of the initial quantized level and the quantization step size value, the computing device determines rate-distortion costs of quantizing the coefficient to be the initial quantized level for the coefficient, the initial quantized level minus one, and in some circumstances, 0. The computing device determines an actual quantized level for the coefficient based at least in part on the calculated rate-distortion costs and includes the actual quantized level in a quantized version of the coefficient block.

Abstract translation: 诸如视频编码器的计算设备确定系数块系数的初始量化电平，并确定该系数是否小于初始量化电平与量化步长值的乘积。 响应于确定系数小于初始量化电平和量化步长值的乘积，计算装置确定将系数量化为系数的初始量化电平的速率失真成本，初始量化电平 在一些情况下，在一些情况下，计算装置至少部分地基于所计算的速率失真成本来确定系数的实际量化级别，并且包括系数块的量化版本中的实际量化级别。

公开(公告)号：US20130182775A1

公开(公告)日：2013-07-18

申请号：US13718945

申请日：2012-12-18

Applicant: Qualcomm Incorporated

Inventor： Ye-Kui Wang ,  Muhammed Zeyd Coban

IPC: H04N7/26

CPC classification number: H04N19/90 ,  H04N19/436 ,  H04N19/46 ,  H04N19/463

Abstract: A video encoder signals whether WPP is used to encode a picture of a sequence of video picture. If WPP is used to encode the picture, the video encoder generates a coded slice NAL unit that includes a plurality of sub-streams, each of which includes a consecutive series of bits that represents one encoded row of coding tree blocks (CTBs) in a slice of the picture. A video decoder receives a bitstream that includes the coded slice NAL unit. Furthermore, the video decoder may determine, based on a syntax element in the bitstream, that the slice is encoded using WPP and may decode the slice using WPP.

Abstract translation: 视频编码器用信号通知WPP是否用于编码视频图像序列的图像。 如果使用WPP对图像进行编码，则视频编码器生成包括多个子流的编码片NAL单元，每个子流包括表示一个编码树块（CTB）中的一个编码行的连续的一系列比特 切片的图片。 视频解码器接收包括编码切片NAL单元的比特流。 此外，视频解码器可以基于比特流中的语法元素来确定使用WPP对切片进行编码，并且可以使用WPP对切片进行解码。

公开(公告)号：US20130107973A1

公开(公告)日：2013-05-02

申请号：US13660789

申请日：2012-10-25

Applicant: Qualcomm Incorporated

Inventor： Ye-Kui Wang ,  In Suk Chong ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/162 ,  H04N19/174 ,  H04N19/70

Abstract: A video coder can be configured to code a syntax element that indicates if a loop filtering operation, such as deblocking filtering, adaptive loop filtering, or sample adaptive offset filtering, is allowed across a tile boundary. A first value for the syntax element may indicate loop filtering is allowed across the tile boundary, and a second value for the syntax element may indicate loop filtering is not allowed across the tile boundary. If loop filtering is allowed across a tile boundary, additional syntax elements may indicate specifically for which boundaries loop filtering is allowed or disallowed.

Abstract translation: 视频编码器可以被配置为对语法元素进行编码，该语法元素指示是否允许跨片段边界的循环滤波操作，诸如去块滤波，自适应环路滤波或采样自适应偏移滤波。 语法元素的第一值可以指示跨越块边界的循环滤波，并且语法元素的第二值可以指示不允许跨平铺边界的循环滤波。 如果跨平铺边界允许循环过滤，则附加的语法元素可以专门指示允许或不允许哪个边界环路过滤。