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Jizheng Xu patents

Recent patents with Jizheng Xu listed as an inventor - additional entries may be under other spellings.


Jizheng Xu - Related organizations: Microsoft Technology Licensing, Llc patents, Microsoft Corporation patents

Block flipping and skip mode in intra block copy prediction

03/09/17 - 20170070748 - 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
Inventors: Bin Li, Jizheng Xu, Feng Wu

Dictionary encoding and decoding of screen content

03/02/17 - 20170064330 - Innovations are provided for encoding and/or decoding video and/or image content using dictionary modes. For example, some innovations predict current pixel values from previous pixel values stored in a 1-D dictionary. Other innovations predict current pixel values from previous pixel values using a pseudo 2-D dictionary mode. Yet other innovations
Inventors: Bin Li, Jizheng Xu, Feng Wu

Encoder-side decisions for sample adaptive offset filtering

02/23/17 - 20170054976 - 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
Inventors: Bin Li, You Zhou, Jizheng Xu, Chih-lung Lin, Feng Wu

Block vector prediction in video and image coding/decoding

11/10/16 - 20160330471 - 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
Inventors: Lihua Zhu, Gary J. Sullivan, Jizheng Xu, Sridhar Sankuratri, B. Anil Kumar, Feng Wu

Encoder-side decisions for block flipping and skip mode in intra block copy prediction

09/22/16 - 20160277761 - 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
Inventors: Bin Li, Jizheng Xu, Feng Wu

Features of base color index map mode for video and image coding and decoding

09/22/16 - 20160277760 - 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
Inventors: Bin Li, Feng Wu, Jizheng Xu

Hash table construction and availability checking for hash-based block matching

09/22/16 - 20160277733 - Innovations in the areas of hash table construction and availability checking reduce computational complexity of hash-based block matching. For example, some of the innovations speed up the process of constructing a hash table or reduce the size of a hash table. This can speed up and reduce memory usage for
Inventors: Bin Li, Jizheng Xu, Feng Wu

Encoder-side decisions for screen content encoding

09/15/16 - 20160269732 - Innovations in encoder-side decisions for coding of screen content video or other video can speed up encoding in various ways. For example, some of the innovations relate to ways to speed up motion estimation by identifying appropriate starting points for the motion estimation in different reference pictures. Many of the
Inventors: Bin Li, Jizheng Xu, Feng Wu

Encoding strategies for adaptive switching of color spaces, color sampling rates and/or bit depths

09/08/16 - 20160261885 - 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
Inventors: Bin Li, Jizheng Xu, Feng Wu

Adaptive switching of color spaces, color sampling rates and/or bit depths

09/08/16 - 20160261884 - 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
Inventors: Bin Li, Jizheng Xu, Feng Wu

Adjusting quantization/scaling and inverse quantization/scaling when switching color spaces

09/08/16 - 20160261865 - Innovations in adaptive encoding and decoding for units of a video sequence can improve coding efficiency when switching between color spaces during encoding and decoding. For example, some of the innovations relate to adjustment of quantization or scaling when an encoder switches color spaces between units within a video sequence
Inventors: Bin Li, Jizheng Xu, Gary J. Sullivan

Representing blocks with hash values in video and image coding and decoding

08/18/16 - 20160241876 - Innovations in hash-based block matching facilitate block copy (“BC”) prediction that is more effective in terms of rate-distortion performance and/or computational efficiency of encoding. For example, some of the innovations relate to encoding blocks with hash values determined using hash-based block matching. Other innovations relate to reconstructing blocks using hash
Inventors: Jizheng Xu, Weijia Zhu

Features of intra block copy prediction mode for video and image coding and decoding

08/18/16 - 20160241868 - Innovations in intra block copy (“BC”) prediction mode facilitate intra BC prediction that is more effective in terms of rate-distortion performance and/or computational efficiency of encoding and decoding. For example, some of the innovations provide ways to select block vector (“BV”) values more effectively. Other innovations provide ways to encode/decode
Inventors: Bin Li, Jizheng Xu, Gary J. Sullivan

Encoder-side options for intra block copy prediction mode for video and image coding

08/18/16 - 20160241858 - Innovations in encoder-side options for intra block copy (“BC”) prediction mode facilitate intra BC prediction that is more effective in terms of rate-distortion performance and/or computational efficiency of encoding. For example, some of the innovations relate to concurrently performing block vector (“BV”) estimation and making block splitting decisions for a
Inventors: Bin Li, Jizheng Xu

Hash-based block matching in video and image coding

08/11/16 - 20160234530 - Innovations in hash-based block matching facilitate block copy (“BC”) prediction that is more effective in terms of rate-distortion performance and/or computational efficiency of encoding. For example, some of the innovations relate to encoding that uses hash-based block matching during block vector (“BV”) estimation. Other innovations relate to data structures that
Inventors: Jizheng Xu, Weijia Zhu

Special case handling for merged chroma blocks in intra block copy prediction mode

07/28/16 - 20160219298 - Innovations in intra block copy (“BC”) prediction facilitate handling of special cases when chroma blocks are merged for purposes of the intra BC prediction. For example, encoding includes intra BC prediction for a set of adjacent units (e.g., prediction units of a coding unit). An encoder derives a block vector
Inventors: Bin Li, Jizheng Xu

Scanning orders for non-transform coding

06/09/16 - 20160165239 - Non-transform blocks of video content may be coded by selectively changing a scanning order. In some implementations, an encoder or decoder may perform a scanning process on a block according to a scanning order. When the block has not been transformed, the encoder or decoder may selectively change the scanning
Inventors: Xiulian Peng, Jizheng Xu

Merge mode for motion information prediction

05/14/15 - 20150131740 - Disclosed herein are representative embodiments of processing digital image data. In one exemplary embodiment disclosed herein, for a current block of a first frame of digital image data, a list of motion vector prediction information for the current block is populated with candidate motion vector prediction data that includes default
Inventors: Bin Li, Jizheng Xu

Video encoder for images

01/15/15 - 20150016521 - Some implementations can compress a digital image to create a compressed image corresponding to the digital image. The digital image can be divided into a plurality of coding units and a determination can be made whether to divide each coding unit of the plurality of coding units into smaller coding
Inventors: Xiulian Peng, Fei Liang, Ji-zheng Xu, Feng Wu

Surface codec using reprojection onto depth maps

07/24/14 - 20140204088 - A surface reprojection codec and method for surface compression using non-redundant surface projection onto depth maps. A multiple depth map encoder takes a two-dimensional (2D) surface that is a representation of a three-dimensional (3D) object and divides it into a plurality of surface patches. Each of these surface patches is
Inventors: Adam Garnet Kirk, Philip Andrew Chou, Patrick John Sweeney, Iii, Jizheng Xu

Video coding redundancy reduction

04/17/14 - 20140105274 - Embodiments for reducing redundancy in video coding are disclosed. In accordance with at least one embodiment, video content is represented as a tree structure in which the nodes of the tree structure are associated with attributes of the video content. An encoder analyzes the nodes to determine whether there is
Inventors: Bin Li, Feng Wu, Jizheng Xu

Non-transform coding

02/27/14 - 20140056347 - Techniques for selectively transforming one or more coding units when coding video content are described herein. The techniques may include determining whether or not to transform a particular coding unit. The determination may be based on a difference in pixel values of the particular coding unit and/or one or more
Inventors: Jizheng Xu, Cuiling Lan

Coded-block-flag coding and derivation

12/26/13 - 20130343462 - Techniques for coding and deriving (e.g., determining) one or more coded-block-flags associated with video content are described herein. A coded-block-flag of a last node may be determined when coded-block-flags of preceding nodes are determined to be a particular value and when a predetermined condition is satisfied. In some instances, the
Inventors: Bin Li, Jizheng Xu

Variable length coding and decoding using counters

07/04/13 - 20130170556 - Disclosed herein are representative embodiments for performing entropy coding or decoding using a counter-based scheme. In one exemplary embodiment disclosed herein, a first codeword is received from compressed digital media data. The first codeword is decoded into a first digital media data value by referencing a codeword table that associates
Inventors: Bin Li, Jizheng Xu

Representative motion information for temporal motion prediction in video encoding and decoding

07/04/13 - 20130170550 - Disclosed herein are representative embodiments of generating representative motion information that can be used during processing of a video frame. In one exemplary embodiment disclosed herein, a reference frame comprising a group of blocks is processed, and motion information for the group of blocks is compressed at least by buffering
Inventors: Bin Li, Jizheng Xu

Merge mode for motion information prediction

07/04/13 - 20130170549 - Disclosed herein are representative embodiments of processing digital image data. In one exemplary embodiment disclosed herein, for a current block of a first frame of digital image data, a list of motion vector prediction information for the current block is populated with candidate motion vector prediction data that includes default
Inventors: Bin Li, Jizheng Xu

Video encoding enhancements

02/28/13 - 20130051452 - Techniques for implementing video encoding enhancements may increase video encoding efficiency. One of the techniques may involve the use of an exception value and a maximum index value in inter-prediction coding lookup table to enhance the combined coding of an inter-prediction direction and a reference frame index for a coding
Inventors: Bin Li, Jizheng Xu, Feng Wu

Syntax element prediction in error correction

11/15/12 - 20120287999 - Architecture that improves error robustness in video coding and decoding. In particular, this can apply to motion vector prediction (MVP) such as a temporal MVP (TMVP). Flags can be used to indicate the use or non-use of a feature, such as to indicate whether the current slice uses or does
Inventors: Bin Li, Jizheng Xu, Feng Wu

Video coding redundancy reduction

07/26/12 - 20120189056 - Embodiments for reducing redundancy in video coding are disclosed. In accordance with at least one embodiment, video content is represented as a tree structure in which the nodes of the tree structure are associated with attributes of the video content. An encoder analyzes the nodes to determine whether there is
Inventors: Bin Li, Jizheng Xu, Feng Wu

External image based summarization techniques

03/29/12 - 20120076414 - Techniques involve visually summarizing documents (e.g., search results, a collection of documents, etc.) using images which are visually representative of the documents for which the images represent. The images representing the documents may be external images obtained from sources other than the documents. The external images may be obtained from
Inventors: Jizheng Xu, Binxing Jiao, Feng Wu

Barbell lifting for wavelet coding

01/28/10 - 20100020882 - A method for encoding motion-compensated video data includes generating, for a current frame, a high-pass wavelet coefficient based on a function of pixels in a temporally adjacent frame. The operations are repeated for multiple pixels in an array of pixels in the current frame to form an array of high-pass
Inventors: Shipeng Li, Ruiqin Xiong, Lin Luo, Jizheng Xu, Feng Wu

Lifting-based directional lapped transforms

09/24/09 - 20090238484 - A “directional lapped transform coder” (“DLT Coder”) provides various techniques for designing directional lapped transforms. In general, lapped transforms are factorized into lifting steps. A “directional operator” is then introduced into each lifting step in order to construct the directional lapped transform by selecting data elements from a data signal
Inventors: Ji-zheng Xu, Feng Wu


### Jizheng Xu patent invention listings

The bibliographic references displayed about Jizheng Xu's patents are for a recent sample of Jizheng Xu's publicly published patent applications. The inventor/author may have additional bibliographic citations listed at the USPTO.gov. FreshPatents.com is not associated or affiliated in any way with the author/inventor or the United States Patent/Trademark Office but is providing this non-comprehensive sample listing for educational and research purposes using public bibliographic data published and disseminated from the United States Patent/Trademark Office public datafeed. This information is also available for free on the USPTO.gov website. If Jizheng Xu filed recent patent applications under another name, spelling or location then those applications could be listed on an alternate page. If no bibliographic references are listed here, it is possible there are no recent filings or there is a technical issue with the listing--in that case, we recommend doing a search on the USPTO.gov website.

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