公开(公告)号：US20190253732A1

公开(公告)日：2019-08-15

申请号：US16271065

申请日：2019-02-08

Applicant: QUALCOMM Incorporated

Inventor： Fnu Hendry ,  Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/597 ,  H04N19/593 ,  H04N19/176 ,  H04N19/105 ,  H04N5/232

Abstract: A video coder may determine reference samples based on a location of a current block of a current picture of the 360-degree video data and a packing arrangement that defines an arrangement of a plurality of regions in the current picture. The current picture is in a projected domain and each respective region of the plurality of regions is a respective face defined by a projection of 360-degree video data. The regions are arranged in the current picture according to the packing arrangement. Based on the location of the current block being at a border of the first region that is adjacent to the second region and there being a discontinuity at the border due to the packing arrangement, the reference samples are samples of the current picture that spatially neighbor the current block in a spherical domain and not in the projected domain.

公开(公告)号：US20190253622A1

公开(公告)日：2019-08-15

申请号：US16270275

申请日：2019-02-07

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Fnu Hendry ,  Marta Karczewicz

IPC: H04N5/232 ,  H04N19/597 ,  H04N19/82

CPC classification number: H04N5/23238 ,  H04N19/597 ,  H04N19/82

Abstract: An example method includes, receiving an encoded picture of 360-degree video data, the encoded picture of 360-degree video data being arranged in packed faces obtained from a projection of a sphere of the 360-degree video data; decoding the picture of encoded 360-degree video data to obtain a reconstructed picture of 360-degree video data, the reconstructed picture of 360-degree video data being arranged in the packed faces; padding the reconstructed picture of 360-degree video data to generate a padded reconstructed picture of 360-degree video data; in-loop filtering the padded reconstructed picture of 360-degree video data to generate a padded and filtered reconstructed picture of 360-degree video data; and storing the padded and filtered reconstructed picture of 360-degree video data in a reference picture memory for use in predicting subsequent pictures of 360-degree video data.

公开(公告)号：US20190007679A1

公开(公告)日：2019-01-03

申请号：US16025729

申请日：2018-07-02

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/115 ,  H04N19/597 ,  H04N19/51 ,  H04N19/96 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/115 ,  G06T15/205 ,  H04N19/105 ,  H04N19/117 ,  H04N19/134 ,  H04N19/176 ,  H04N19/186 ,  H04N19/51 ,  H04N19/563 ,  H04N19/597 ,  H04N19/85 ,  H04N19/88 ,  H04N19/96

Abstract: This disclosure describes techniques for generating reference frames packed with extended faces from a cubemap projection or adjusted cubemap projection of 360-degree video data. The reference frames packed with the extended faces may be used for inter-prediction of subsequent frames of 360-degree video data.

公开(公告)号：US09756327B2

公开(公告)日：2017-09-05

申请号：US13793942

申请日：2013-03-11

Applicant: QUALCOMM Incorporated

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

IPC: H04N7/26 ,  H04N7/32 ,  H04N19/126 ,  H04N19/176 ,  H04N19/117 ,  H04N19/157 ,  H04N19/86

CPC classification number: H04N19/126 ,  H04N19/117 ,  H04N19/157 ,  H04N19/176 ,  H04N19/86

Abstract: A device may include a video coder to determine an equivalent quantization parameter (QP) for a decoded block of video data using a quantization matrix for the decoded block of video data, determine deblocking parameters based on the determined equivalent QP, and deblock an edge of the decoded block based on the determined deblocking parameters. In particular, the video coder may determine equivalent QPs for two neighboring blocks defining a common edge, and deblock the common edge based on the equivalent QPs. The video coder may determine deblocking parameters, such as β and tc values, based on the equivalent QPs. The video coder may then deblock the common edge based on the deblocking parameters, e.g., determine whether to deblock the common edge, determine whether to apply a strong or a weak filter to the common edge, and determine a width (in number of pixels) for a weak filter.

公开(公告)号：US09510020B2

公开(公告)日：2016-11-29

申请号：US13655009

申请日：2012-10-18

Applicant: Qualcomm Incorporated

Inventor： Geert Van der Auwera ,  Marta Karczewicz ,  Xianglin Wang

IPC: H04N7/32 ,  H04N19/86 ,  H04N19/176 ,  H04N19/70 ,  H04N19/117 ,  H04N19/157 ,  H04N19/182 ,  H04N19/82 ,  H04N19/12 ,  H04N19/61

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/12 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182 ,  H04N19/61 ,  H04N19/70 ,  H04N19/82

Abstract: Techniques for coding video data include coding a plurality of blocks of video data, wherein at least one block of the plurality of blocks of video data is coded using a coding mode that is one of an intra pulse code modulation (IPCM) coding mode and a lossless coding mode. In some examples, the lossless coding mode may use prediction. The techniques further include assigning a non-zero quantization parameter (QP) value for the at least one block coded using the coding mode. The techniques also include performing deblocking filtering on one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value for the at least one block.

Abstract translation: 用于对视频数据进行编码的技术包括对多个视频数据块进行编码，其中使用作为帧内脉码调制（IPCM）编码模式和编码模式之一的编码模式来对多个视频数据块中的至少一个块进行编码 无损编码模式。 在一些示例中，无损编码模式可以使用预测。 所述技术还包括为使用编码模式编码的至少一个块分配非零量化参数（QP）值。 所述技术还包括：基于用于对所述至少一个块进行编码的编码模式和所述至少一个块的所分配的非零QP值，对所述多个视频数据块中的一个或多个块执行去块滤波。

公开(公告)号：US09510000B2

公开(公告)日：2016-11-29

申请号：US14635958

申请日：2015-03-02

Applicant: QUALCOMM Incorporated

Inventor： In Suk Chong ,  Geert Van der Auwera ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/14 ,  H04N19/176 ,  H04N19/70 ,  H04N19/196 ,  H04N19/117 ,  H04N19/463 ,  H04N19/167

CPC classification number: H04N19/105 ,  H04N19/117 ,  H04N19/14 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/463 ,  H04N19/70

Abstract: This disclosure describes techniques for performing sample adaptive offset signaling and coding in a video coding process. Techniques of the disclosure include both a merge-based and prediction-based signaling process for sample adaptive offset information (i.e., offset values and offset type). The techniques includes determining offset information for a current partition, comparing the offset information of the current partition with offset information of one or more neighbor partitions, coding a merge instruction in the case that the offset information of one of the one or more neighbor partitions is the same as the offset information of the current partition, and coding one of a plurality of prediction instructions in the case that the offset information of the one or more neighbor partitions is not the same as the offset information of the current partition.

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：US20130343464A1

公开(公告)日：2013-12-26

申请号：US13922851

申请日：2013-06-20

Applicant: Qualcomm Incorporated

Inventor： Geert Van der Auwera ,  Marta Karczewicz

IPC: H04N7/30

CPC classification number: H04N19/60 ,  H04N19/12 ,  H04N19/157 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

Abstract: A device for coding video data includes a video coder configured to: determine for a chroma transform block (TB) a sub-sampling format for the chroma TB; based on the sub-sampling format for the chroma TB, identify one or more corresponding luma TBs; determine, for each of the one or more corresponding luma TBs, if the corresponding luma TB is coded using a transform skip mode; and, based on a number of the one or more corresponding luma TBs coded using the transform skip mode being greater than or equal to a threshold value, determine that the chroma TB is coded in the transform skip mode.

Abstract translation: 用于编码视频数据的设备包括视频编码器，其被配置为：为色度变换块（TB）确定色度TB的子采样格式; 基于色度TB的子采样格式，识别一个或多个对应的亮度TB; 对于一个或多个对应亮度TB中的每一个，确定如果使用变换跳过模式对相应亮度TB进行编码; 并且基于使用变换跳过模式编码的一个或多个相应亮度TB的数量大于或等于阈值的数量，确定色变TB以变换跳过模式被编码。

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：US20130188733A1

公开(公告)日：2013-07-25

申请号：US13743592

申请日：2013-01-17

Applicant: Qualcomm Incorporated

Inventor： Geert Van der Auwera ,  Ye-Kui Wang ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/86 ,  H04N19/105 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/184 ,  H04N19/43 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70

Abstract: This disclosure describes techniques for signaling deblocking filter parameters for a current slice of video data with reduced bitstream overhead. Deblocking filter parameters may be coded in one or more of a picture layer parameter set and a slice header. The techniques reduce a number of bits used to signal the deblocking filter parameters by coding a first syntax element that indicates whether deblocking filter parameters are present in both the picture layer parameter set and the slice header, and only coding a second syntax element in the slice header when both sets of deblocking filter parameters are present. Coding the second syntax element is eliminated when deblocking filter parameters are present in only one of the picture layer parameter set or the slice header. The second syntax element indicates which set of deblocking filter parameters to use to define a deblocking filter applied to a current slice.

Abstract translation: 本公开描述了用于以减少的比特流开销为视频数据的当前切片信令去块滤波器参数的信号的技术。 去块滤波器参数可以在图像层参数集和片头中的一个或多个中被编码。 这些技术通过编码表示去块滤波器参数是否存在于图像层参数集和片头中的第一语法元素来减少用于通知去块滤波器参数的位数，并且仅对切片中的第二语法元素进行编码 当存在两组去块滤波器参数时，头部。 当去块滤波器参数仅存在于图像层参数集或片头中的一个时，消除了第二语法元素的编码。 第二个语法元素指出哪一组去块滤波器参数用于定义应用于当前片的去块滤波器。