公开(公告)号：US20190141316A1

公开(公告)日：2019-05-09

申请号：US16311129

申请日：2017-07-20

申请人： Microsoft Technology Licensing, LLC

发明人： Cuiling Lan ,  Chong Luo ,  Feng Wu ,  Wenjun Zeng

IPC分类号： H04N19/103 ,  H04N19/124 ,  H04N19/154 ,  H04N19/192 ,  H04N19/18

摘要： In accordance with implementations of the subject matter described herein, a hybrid digital-analog coding scheme is proposed. In general, in accordance with implementations of the subject matter described herein, digital or analog encoding is selected at a level of chunks of a frame rather than at a level of the whole frame. Further, the encoding of a chunk is based on an expected distortion to be caused by analog transmission of the chunk over a communication channel, the distortion being estimated based on a constraint on available transmission resources over the transmission channel.

公开(公告)号：US20190098335A1

公开(公告)日：2019-03-28

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 ,  H04N19/13 ,  H04N19/176 ,  H04N19/587 ,  H04N19/157 ,  H04N19/88 ,  H04N19/82 ,  H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/70 ,  H04N19/61 ,  H04N19/172

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：US20190028737A1

公开(公告)日：2019-01-24

申请号：US16140034

申请日：2018-09-24

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Jizheng Xu ,  Feng Wu

IPC分类号： H04N19/59 ,  H04N19/182 ,  H04N19/132 ,  H04N19/587 ,  H04N19/186 ,  H04N19/117 ,  H04N19/176 ,  H04N19/147 ,  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：US09888237B2

公开(公告)日：2018-02-06

申请号：US13850178

申请日：2013-03-25

申请人： Microsoft Technology Licensing, LLC

发明人： Alexandros Tourapis ,  Feng Wu ,  Shipeng Li

IPC分类号： H04N7/12 ,  H04N19/51 ,  H04N19/56 ,  H04N19/52 ,  H04N19/176 ,  H04N19/147 ,  H04N19/513 ,  H04N19/109 ,  H04N19/573 ,  H04N19/577

CPC分类号： H04N19/109 ,  H04N19/147 ,  H04N19/176 ,  H04N19/513 ,  H04N19/52 ,  H04N19/56 ,  H04N19/573 ,  H04N19/577

摘要： Improved video coding is described to encode video data within a sequence of video frames. To this end, at least a portion of a reference frame is encoded to include motion information associated with the portion of the reference frame. At least a portion of a predictable frame that includes video data predictively correlated to s portion of said reference frame is defined based on the motion information. At least said portion of the predictable frame is encoded without including corresponding motion information and including mode identifying data. The mode identifying data indicate that the encoded portion of the predictable frame can be directly derived using at least the motion information associated with the portion of the reference frame.

公开(公告)号：US20170054976A1

公开(公告)日：2017-02-23

申请号：US15307746

申请日：2014-04-29

申请人： MICROSOFT TECHNOLOGY LICENSING, LLC

发明人： Bin Li ,  You Zhou ,  Jizheng Xu ,  Chih-Lung Lin ,  Feng Wu

IPC分类号： H04N19/117 ,  H04N19/169 ,  H04N19/70 ,  H04N19/132 ,  H04N19/86 ,  H04N19/14

CPC分类号： H04N19/117 ,  H04N19/132 ,  H04N19/14 ,  H04N19/157 ,  H04N19/172 ,  H04N19/1883 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

摘要： Disclosed herein are exemplary embodiments of innovations in the area of encoding pictures or portions of pictures (e.g., slices, coding tree units, or coding units) and determining whether and how certain filtering operation should be performed and flagged for performance by the decoder in the bitstream. In particular examples, various implementations for setting the sample adaptive offset (SAO) syntax elements in the H.265/HEVC standard are disclosed. Although these examples concern the H.265/HEVC standard and its SAO filter, the disclosed technology is more widely applicable to other video codecs that involve filtering operations (particularly multi-stage filtering operations) as part of their encoding and decoding processes.

摘要翻译： 这里公开了对图像或图像的一部分（例如，切片，编码树单元或编码单元）进行编码的领域的创新的示例性实施例，并且确定是否以及如何执行某些滤波操作并且如何被标记以供解码器在 比特流。 在具体示例中，公开了用于设置H.265 / HEVC标准中的样本自适应偏移（SAO）语法元素的各种实施方式。 尽管这些示例涉及H.265 / HEVC标准及其SAO滤波器，但是所公开的技术更广泛地适用于涉及其编码和解码过程的一部分的滤波操作（特别是多级滤波操作）的其它视频编解码器。

公开(公告)号：US20160277760A1

公开(公告)日：2016-09-22

申请号：US15025134

申请日：2013-10-14

申请人： MICROSOFT TECHNOLOGY LICENSING, LLC

发明人： Bin Li ,  Feng Wu ,  Jizheng Xu

IPC分类号： H04N19/593 ,  H04N19/126

摘要： Innovations in the use of base color index map (“BCIM”) mode during 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.

摘要翻译： 在编码和/或解码期间使用基色指数图（“BCIM”）模式的创新通过减少支持BCIM模式的修改数量和/或提高BCIM模式的编码效率来简化实现。 例如，一些创新涉及重用适用于变换系数的语法结构，以代替在BCIM模式下对索引图的元素进行信号的信号。 其他创新涉及BCIM模式下的索引值的映射或BCIM模式下的索引映射的元素的预测。 其他创新还涉及BCIM模式下异常值的处理。

公开(公告)号：US20240064327A1

公开(公告)日：2024-02-22

申请号：US18386960

申请日：2023-11-03

申请人： Microsoft Technology Licensing, LLC

发明人： Xiaoyan Sun ,  Zhiwei Xiong ,  Feng Wu

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

CPC分类号： H04N19/51 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/80 ,  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：US20220295093A1

公开(公告)日：2022-09-15

申请号：US17751392

申请日：2022-05-23

申请人： Microsoft Technology Licensing, LLC

发明人： Lihua Zhu ,  Gary J. Sullivan ,  Jizheng Xu ,  Sridhar Sankuratri ,  B. Anil Kumar ,  Feng Wu

IPC分类号： H04N19/52 ,  H04N19/91

摘要： Innovations in the area of prediction of block vector (“BV”) values improve encoding or decoding of blocks using intra block copy (“BC”) prediction. For example, some of the innovations relate to use of a default BV predictor with a non-zero value. Other innovations relate to use of a selected one of multiple BV predictor candidates for a current block. Still other innovations relate to use of a skip mode in which a current intra-BC-predicted block uses a predicted BV value.

公开(公告)号：US11388433B2

公开(公告)日：2022-07-12

申请号：US16577883

申请日：2019-09-20

申请人： Microsoft Technology Licensing, LLC

发明人： Lihua Zhu ,  Gary J. Sullivan ,  Jizheng Xu ,  Sridhar Sankuratri ,  B. Anil Kumar ,  Feng Wu

IPC分类号： H04N19/52 ,  H04N19/91

摘要： Innovations in the area of prediction of block vector (“BV”) values improve encoding or decoding of blocks using intra block copy (“BC”) prediction. For example, some of the innovations relate to use of a default BV predictor with a non-zero value. Other innovations relate to use of a selected one of multiple BV predictor candidates for a current block. Still other innovations relate to use of a skip mode in which a current intra-BC-predicted block uses a predicted BV value.

公开(公告)号：US20200228834A1

公开(公告)日：2020-07-16

申请号：US16828799

申请日：2020-03-24

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Feng Wu ,  Jizheng Xu

IPC分类号： H04N19/593 ,  H04N19/70 ,  H04N19/126

摘要： Innovations in the use of base color index map (“BCIM”) mode during 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.