公开(公告)号：US12101503B2

公开(公告)日：2024-09-24

申请号：US18177633

申请日：2023-03-02

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Jizheng Xu ,  Feng Wu

IPC分类号： H04N19/59 ,  H04N19/117 ,  H04N19/132 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/587 ,  H04N19/51 ,  H04N19/593

CPC分类号： H04N19/59 ,  H04N19/117 ,  H04N19/132 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/587 ,  H04N19/51 ,  H04N19/593

摘要： Innovations in adaptive encoding for units of a video sequence can improve coding efficiency. For example, some of the innovations relate to encoding that includes adaptive switching of color spaces between units within a video sequence. Other innovations relate encoding that includes adaptive switching of color sampling rates between units within a video sequence. Still other innovations relate encoding that includes adaptive switching of bit depths between units within a video sequence.

公开(公告)号：US12096024B2

公开(公告)日：2024-09-17

申请号：US17572152

申请日：2022-01-10

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Feng Wu ,  Jizheng Xu

IPC分类号： H04N19/593 ,  H04N19/126 ,  H04N19/70 ,  H04N19/11 ,  H04N19/154 ,  H04N19/176 ,  H04N19/61

CPC分类号： H04N19/593 ,  H04N19/126 ,  H04N19/70 ,  H04N19/11 ,  H04N19/154 ,  H04N19/176 ,  H04N19/61

摘要： Innovations in the use of base color index map (“BCIM”) mode dining encoding and/or decoding simplify implementation by reducing the number of modifications made to support BCIM mode and/or improve coding efficiency of BCIM mode. For example, some of the innovations involve reuse of a syntax structure that is adapted for transform coefficients to instead signal data for elements of an index map in BCIM mode. Other innovations relate to mapping of index values in BCIM mode or prediction of elements of an index map in BCIM mode. Still other innovations relate to handling of exception values in BCIM mode.

公开(公告)号：US11575934B2

公开(公告)日：2023-02-07

申请号：US17669235

申请日：2022-02-10

申请人： Microsoft Technology Licensing, LLC

发明人： Alexandros Tourapis ,  Shipeng Li ,  Feng Wu

IPC分类号： H04N19/577 ,  H04N19/87 ,  H04N19/52 ,  H04N19/513 ,  H04N19/105 ,  H04N19/176 ,  H04N19/51 ,  H04N19/102 ,  H04N19/61 ,  H04N19/593 ,  H04N19/137 ,  H04N19/142 ,  H04N19/573 ,  H04N19/56 ,  H04N19/58 ,  H04N19/107

摘要： Several improvements for use with Bidirectionally Predictive (B) pictures within a video sequence are provided. In certain improvements Direct Mode encoding and/or Motion Vector Prediction are enhanced using spatial prediction techniques. In other improvements Motion Vector prediction includes temporal distance and subblock information, for example, for more accurate prediction. Such improvements and other presented herein significantly improve the performance of any applicable video coding system/logic.

公开(公告)号：US11528499B2

公开(公告)日：2022-12-13

申请号：US17188784

申请日：2021-03-01

申请人： Microsoft Technology Licensing, LLC

发明人： Xiaoyan Sun ,  Zhiwei Xiong ,  Feng Wu

IPC分类号： H04N19/51 ,  H04N19/80 ,  H04N19/176 ,  H04N19/117 ,  H04N19/14 ,  H04N19/86

摘要： Disclosed herein are exemplary embodiments of methods, apparatus, and systems for performing content-adaptive deblocking to improve the visual quality of video images compressed using block-based motion-predictive video coding. For instance, in certain embodiments of the disclosed technology, edge information is obtained using global orientation energy edge detection (“OEED”) techniques on an initially deblocked image. OEED detection can provide a robust partition of local directional features (“LDFs”). For a local directional feature detected in the partition, a directional deblocking filter having an orientation corresponding to the orientation of the LDF can be used. The selected filter can have a filter orientation and activation thresholds that better preserve image details while reducing blocking artifacts. In certain embodiments, for a consecutive non-LDF region, extra smoothing can be imposed to suppress the visually severe blocking artifacts.

公开(公告)号：US20200244991A1

公开(公告)日：2020-07-30

申请号：US16850847

申请日：2020-04-16

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Jizheng Xu ,  Feng Wu

IPC分类号： H04N19/59 ,  H04N19/176 ,  H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/157 ,  H04N19/587 ,  H04N19/82 ,  H04N19/13 ,  H04N19/88

摘要： Innovations in adaptive encoding and decoding for units of a video sequence can improve coding efficiency. For example, some of the innovations relate to encoding/decoding that includes adaptive switching of color spaces between units within a video sequence. Other innovations relate encoding/decoding that includes adaptive switching of color sampling rates between units within a video sequence. Still other innovations relate encoding/decoding that includes adaptive switching of bit depths between units within a video sequence.

公开(公告)号：US10666972B2

公开(公告)日：2020-05-26

申请号：US16126325

申请日：2018-09-10

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Jizheng Xu ,  Feng Wu

IPC分类号： H04N19/59 ,  H04N19/176 ,  H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/157 ,  H04N19/587 ,  H04N19/82 ,  H04N19/13 ,  H04N19/88 ,  H04N19/172 ,  H04N19/61 ,  H04N19/70

摘要： Innovations in adaptive encoding and decoding for units of a video sequence can improve coding efficiency. For example, some of the innovations relate to encoding/decoding that includes adaptive switching of color spaces between units within a video sequence. Other innovations relate encoding/decoding that includes adaptive switching of color sampling rates between units within a video sequence. Still other innovations relate encoding/decoding that includes adaptive switching of bit depths between units within a video sequence.

公开(公告)号：US10368092B2

公开(公告)日：2019-07-30

申请号：US15029585

申请日：2014-03-04

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Jizheng Xu ,  Feng Wu

IPC分类号： H04N19/103 ,  H04N19/593 ,  H04N19/105 ,  H04N19/176 ,  H04N19/126 ,  H04N19/61 ,  H04N19/124 ,  H04N19/132

摘要： Innovations in the area of encoding blocks using hash-based block matching improve coding efficiency in many situations. For example, some of the innovations relate to encoder-side decisions about when to use block flipping during prediction. Other innovations relate to encoder-side decisions about when to use skip mode for a block predicted using intra block copy (“BC”) prediction.

公开(公告)号：US10368091B2

公开(公告)日：2019-07-30

申请号：US15029469

申请日：2014-03-04

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Jizheng Xu ,  Feng Wu

IPC分类号： H04N7/12 ,  H04N19/593 ,  H04N19/176 ,  H04N19/70 ,  H04N19/132 ,  H04N19/115

摘要： Innovations in the area of encoding or decoding of blocks using intra block copy (“BC”) prediction improve coding efficiency for intra-BC-predicted blocks in many situations. For example, some of the innovations relate to block flipping in which an intra-BC-predicted block is flipped relative to a reference region, which can be indicated by a block vector (“BV”) value. Other innovations relate to signaling of a skip mode in which a current intra-BC-predicted block uses a signaled BV differential but lacks residual data.

公开(公告)号：US20170118488A1

公开(公告)日：2017-04-27

申请号：US15391652

申请日：2016-12-27

申请人： Microsoft Technology Licensing, LLC

发明人： Alexandros Tourapis ,  Shipeng Li ,  Feng Wu

IPC分类号： H04N19/577 ,  H04N19/58 ,  H04N19/593

CPC分类号： H04N19/577 ,  H04N19/102 ,  H04N19/105 ,  H04N19/107 ,  H04N19/137 ,  H04N19/142 ,  H04N19/176 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/56 ,  H04N19/573 ,  H04N19/58 ,  H04N19/593 ,  H04N19/61 ,  H04N19/87

摘要： Several improvements for use with Bidirectionally Predictive (B) pictures within a video sequence are provided. In certain improvements Direct Mode encoding and/or Motion Vector Prediction are enhanced using spatial prediction techniques. In other improvements Motion Vector prediction includes temporal distance and subblock information, for example, for more accurate prediction. Such improvements and other presented herein significantly improve the performance of any applicable video coding system/logic.

公开(公告)号：US20170094291A1

公开(公告)日：2017-03-30

申请号：US15379158

申请日：2016-12-14

申请人： Microsoft Technology Licensing, LLC

发明人： Xiaoyan Sun ,  Feng Wu ,  Hao Wu

IPC分类号： H04N19/40 ,  H04N19/91 ,  H04N19/593 ,  H04N19/15 ,  H04N19/105 ,  H04N19/124 ,  H04N19/61

CPC分类号： H04N19/40 ,  H04N19/105 ,  H04N19/124 ,  H04N19/15 ,  H04N19/176 ,  H04N19/44 ,  H04N19/463 ,  H04N19/48 ,  H04N19/50 ,  H04N19/593 ,  H04N19/61 ,  H04N19/619 ,  H04N19/91

摘要： Approaches to re-encoding image sets using frequency-domain differences, along with corresponding approaches to reversing the re-encoding of the image sets. For example, a re-encoding tool computes frequency-domain differences between (a) quantized coefficients for a block from encoded data in a first format and (b) quantized coefficients for a prediction of the block. The re-encoding tool entropy codes the frequency-domain differences, producing encoded data in a second format for the compressed images. Such re-encoding can significantly reduce storage cost for previously compressed images, compared to the storage cost for the previously compressed images in the first format, without hurting image quality. Subsequently, the previously compressed images in the first format can be recovered from the encoded data in the second format. Or, the encoded data in the second format can be decoded to reconstruct the images.