Patents by Inventor Debing Liu

Debing Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190244115
    Abstract: In a method for invitation behavior prediction, group behavior feature information of a first user of a group is obtained. In addition, group relationship feature information of a second user is obtained. Further, group architecture information of the group, the group behavior feature information of the first user, and the group relationship feature information of the second user are input to an invitation prediction model, to obtain a target member user and a candidate invitation user of the target member user. The invitation prediction model is obtained by training the invitation prediction model based on a plurality of sample groups in a training set, and group relationship feature information of associated users of member users in the plurality of sample groups. Invitation prediction information is sent to the target member user to prompt the target member user to add the candidate invitation user to the group.
    Type: Application
    Filed: April 18, 2019
    Publication date: August 8, 2019
    Applicants: TSINGHUA UNIVERSITY, TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Jie TANG, Jiezhong Qiu, Yujie Qian, Bo Chen, Hao Ye, Debing Liu, Yufei Zheng
  • Patent number: 9924167
    Abstract: A particular implementation determines objective distortion levels (d,) respectively for a plurality of artifact types. The objective distortion levels are aligned to ensure that the same distortion level of different types of artifacts corresponds to the same perceived distortion level. The aligned distortion levels (d,?) are sorted to obtain sorted distortion levels (d,?). The sorted distortion levels are then pooled together into an overall distortion level or an overall quality metric. The sorted distortion levels may be pooled using a weighted sum, wherein the weight is larger when the sorted distortion level is greater.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: March 20, 2018
    Assignee: THOMSON Licensing
    Inventors: Xiaodong Gu, Debing Liu, Zhibo Chen
  • Patent number: 9715736
    Abstract: The present invention generally relates to automatic detection of video artifacts. The present invention relates to automatically detect out the images with visible artifacts due to STB decoding error based on a generated artificial edge map. In particular, the application teaches a method to detect out the images with the visible artifacts and how to identify artificial edges from texture (natural) edges. The present system identifies that artificial edges are most significant in local area, while texture edges are often together with some other texture edges.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: July 25, 2017
    Assignee: Thomson Licensing
    Inventors: Debing Liu, Zhibo Chen, Xiaodong Gu
  • Patent number: 9280813
    Abstract: An image is partitioned into a foreground area, a background area, and optionally a transitional area. The partitioning may be pre-defined, or it may be based on user inputs and configuration data. The partitioning may also be refined based on an initial partitioning. Blur measures are determined respectively for the partitioned areas. A blur measure for the whole image can then be determined from a weighted average of the blur measures for the partitioned areas. The blur measure for the image can be used in a video quality monitor.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: March 8, 2016
    Inventors: Debing Liu, Zhibo Chen, Xiaodong Gu
  • Publication number: 20160029106
    Abstract: Various implementations relate to providing a pictorial summary, also referred to as a comic book or a narrative abstraction. In one particular implementation, one or more parameters from a configuration guide are accessed. The configuration guide includes one or more parameters for configuring a pictorial summary of a video. The video is accessed. The pictorial summary for the video is generated. The pictorial summary conforms to the one or more accessed parameters from the configuration guide.
    Type: Application
    Filed: March 6, 2013
    Publication date: January 28, 2016
    Inventors: Zhibo CHEN, Debing LIU, Xiaodong GU, Fan ZHANG
  • Publication number: 20160012607
    Abstract: The present invention generally relates to automatic detection of video artifacts. The present invention relates to automatically detect out the images with visible artifacts due to STB decoding error based on a generated artificial edge map. In particular, the application teaches a method to detect out the images with the visible artifacts and how to identify artificial edges from texture (natural) edges. The present system identifies that artificial edges are most significant in local area, while texture edges are often together with some other texture edges.
    Type: Application
    Filed: August 9, 2012
    Publication date: January 14, 2016
    Inventors: Debing Liu, Zhibo Chen, Xiaodong Gu
  • Publication number: 20150382083
    Abstract: Various implementations relate to providing a pictorial summary, also referred to as a comic book or a narrative abstraction. In one particular implementation, a first portion in a video is accessed, and a second portion in the video is accessed. A weight for the first portion is determined, and a weight for the second portion is determined. A first number and a second number are determined. The first number identifies how many pictures from the first portion are to be used in a pictorial summary of the video. The first number is one or more, and is determined based on the weight for the first portion. The second number identifies how many pictures from the second portion are to be used in the pictorial summary of the video. The second number is one or more, and is determined based on the weight for the second portion.
    Type: Application
    Filed: March 6, 2013
    Publication date: December 31, 2015
    Applicant: Thomson Licensing
    Inventors: Zhibo CHEN, Debing LIU, Xiaodong GU, Fan ZHANG
  • Patent number: 9076220
    Abstract: A method for processing an image divided into blocks of pixels is described. The method includes detecting a largest sub-block whose pixels have an equal luminance value and identifying if the detected largest sub-block is or is not a natural texture. Thereafter, a weighted luminance difference is calculated between the detected largest sub-block and neighboring pixels and a block blockiness level is determined on the basis of the number of pixels within the detected largest sub-block, of the identification step and of the weighted luminance difference. The image is then processed on the basis of the block blockiness level.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: July 7, 2015
    Assignee: Thomson Licensing
    Inventors: Debing Liu, Zhibo Chen, Xiaodong Gu, Feng Xu
  • Publication number: 20140328550
    Abstract: An image is partitioned into a foreground area, a background area, and optionally a transitional area. The partitioning may be pre-defined, or it may be based on user inputs and configuration data. The partitioning may also be refined based on an initial partitioning. Blur measures are determined respectively for the partitioned areas. A blur measure for the whole image can then be determined from a weighted average of the blur measures for the partitioned areas. The blur measure for the image can be used in a video quality monitor.
    Type: Application
    Filed: January 20, 2012
    Publication date: November 6, 2014
    Applicant: THOMSON LICENSING
    Inventors: Debing Liu, Zhibo Chen, Xiaodong Gu
  • Patent number: 8879003
    Abstract: Various implementations address distortion and quality measurements. Certain implementations relate to distortions resulting in a freeze-with-skip and/or a freeze-without-skip. In one implementation, a pause term provides an indication of distortion associated with a pause arising from not displaying one or more consecutive pictures that are not to be displayed. A motion term provides an indication of distortion associated with a related change in motion. A combined indicator is based on an addition of the pause term and the motion term. In another particular implementation, a first indicator indicates distortion across one or more types of distortive effects that results from not displaying a first set of pictures. A second indicator indicates corresponding distortion with respect to a second set of pictures. The first indicator and the second indicator are combined in a non-linear manner.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: November 4, 2014
    Assignee: Thomson Licensing
    Inventors: Xiaodong Gu, Debing Liu, Zhibo Chen
  • Publication number: 20140321558
    Abstract: A particular implementation determines objective distortion levels (d,) respectively for a plurality of artifact types. The objective distortion levels are aligned to ensure that the same distortion level of different types of artifacts corresponds to the same perceived distortion level. The aligned distortion levels (d,?) are sorted to obtain sorted distortion levels (d,?). The sorted distortion levels are then pooled together into an overall distortion level or an overall quality metric. The sorted distortion levels may be pooled using a weighted sum, wherein the weight is larger when the sorted distortion level is greater.
    Type: Application
    Filed: November 28, 2011
    Publication date: October 30, 2014
    Inventors: Xiaodong Gu, Debing Liu, Zhibo Chen
  • Publication number: 20140307103
    Abstract: Various implementations address distortion and quality measurements. Certain implementations relate to distortions resulting in a freeze-with-skip and/or a freeze-without-skip. In one implementation, a pause term provides an indication of distortion associated with a pause arising from not displaying one or more consecutive pictures that are not to be displayed. A motion term provides an indication of distortion associated with a related change in motion. A combined indicator is based on an addition of the pause term and the motion term. In another particular implementation, a first indicator indicates distortion across one or more types of distortive effects that results from not displaying a first set of pictures. A second indicator indicates corresponding distortion with respect to a second set of pictures. The first indicator and the second indicator are combined in a non-linear manner.
    Type: Application
    Filed: November 28, 2011
    Publication date: October 16, 2014
    Applicant: THOMSON LICENSING
    Inventors: Xiaodong Gu, Debing Liu, Zhibo Chen
  • Publication number: 20140254938
    Abstract: Methods and apparatus for artifact detection are provided by the present principles that measure the level of artifacts, such as those caused by temporal concealment of errors due to packet loss, for conditional error concealment. The principles are based on an assumption that sharp edges of video are rarely aligned with macroblock boundaries so video discontinuities are checked throughout the video. The scheme solves the problem of error propagation when temporal concealment of artifacts is used and the high false alarm rates of prior methods. Artifact detection methods are provided for regions of an image, an entire image, or for a video sequence, with error concealment provided conditionally based on the artifact levels.
    Type: Application
    Filed: November 24, 2011
    Publication date: September 11, 2014
    Applicant: THOMSON LICENSING
    Inventors: Xiaodong Gu, Debing Liu, Zhibo Chen
  • Patent number: 8824783
    Abstract: The invention is made in the technical field of video quality measurement. More precisely, the invention is related to mean observer score prediction using a trained semi-supervised learning regressor. That is, a method and apparatus for measuring video quality using a semi-supervised learning system for mean observer score prediction is proposed. Said semi-supervised learning system comprises at least one semi-supervised learning regressor and said method comprises training the learning system and retraining the trained learning system using a selection of test data wherein the test data is used for determining at least one mean observer score prediction using the trained learning system and the selection is indicated by a feedback received through a user interface upon presenting, in the user interface, said at least one mean observer score prediction. Doing so, prediction quality can be improved after re-training at least for the selection.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: September 2, 2014
    Assignee: Thomson Licensing
    Inventors: Feng Xu, Zhibo Chen, Debing Liu, Xiaodong Gu
  • Patent number: 8823873
    Abstract: Blur is one of the most important features related to image quality. Accurately estimating the blur level of an image is a great help to accurately evaluate its quality. A method for calculating blur of video images comprises calculating a horizontal blur value, and determining characteristic parameters of the video images, including at last progressive/interlaced and spatial resolution level. If the video images are progressive, also a vertical blur value is calculated, and combined with the horizontal blur value. The next step is normalizing the horizontal blur value, or the combined horizontal and vertical blur value, according to predefined min and max values, wherein the min and max values are adapted to the spatial resolution level.
    Type: Grant
    Filed: October 10, 2009
    Date of Patent: September 2, 2014
    Assignee: Thomson Licensing
    Inventors: Debing Liu, Zhibo Chen, Xaiodong Gu, Feng Xu
  • Patent number: 8723960
    Abstract: The purpose of an objective video quality evaluation is to automatically assess the quality of video sequences in agreement with human quality perception. The invention addresses the effects of the introduction of a temporal dimension by focusing on the temporal evolutions of spatial distortions, since it has been found that a spatial quality variation cannot be evaluated by simple subtraction of the spatial quality of neighboring frames. An improved method for estimating perceived video quality comprises steps of calculating a first similarity map between adjacent frames of a current sequence, calculating a second similarity map between the corresponding reference frames, and calculating (smg3) a third similarity map, which provides a numerical quality value.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: May 13, 2014
    Assignee: Thomson Licensing
    Inventors: Xiaodong Gu, Debing Liu, Feng Xu, Zhibo Chen
  • Patent number: 8724899
    Abstract: A method for processing an image divided into blocks of pixels is disclosed. The method comprises the steps of: detecting, for each block, a largest sub-block whose pixels have an equal luminance value; identifying, for each block, if the detected largest sub-block is or is not a natural texture; determining, for each block, a block blockiness level on the basis of the number of pixels within the detected largest sub-block and on the basis of the identification step; and processing the image on the basis of the block blockiness levels.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: May 13, 2014
    Assignee: Thomson Licensing
    Inventors: Debing Liu, Zhibo Chen, Xiaodong Gu, Feng Xu
  • Patent number: 8675075
    Abstract: A method and apparatus for measuring the quality of a video sequence, which includes a plurality of frames, among which one or more consecutive frames are lost, wherein during the displaying of the video sequence, the one or more lost frames are substituted by an immediate preceding frame in the video sequence during a period from the displaying of the immediate preceding frame to that of an immediate subsequent frame of the one or more lost frames, the method includes measuring the quality of the video sequence as a function of a first parameter (DF) relating to the stability of the immediate preceding frame during the period, a second parameter (DD) relating to the continuity between the immediate preceding frame and the immediate subsequent frame, and a third parameter (DP) relating to the coherent 20 motions of the video sequence.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: March 18, 2014
    Assignee: Thomson Licensing
    Inventors: Xiaodong Gu, Debing Liu, Zhibo Chen
  • Publication number: 20130251045
    Abstract: A method for determining a motion vector for a current video frame block comprises determining the motion vector using full search. Then, a number of further motion vectors is counted which is the number of motion vectors of neighbouring blocks which are similar to each other and the motion vector. Then it is ascertained that the number meets or exceeds a threshold and that the motion vector is not similar to at least one of the counted further motion vectors. A search region is determined using counted motion vectors and searched for a local best match of the current block. The motion vector is changed towards referencing the local best match. The search region only comprises candidates referenced by motion vector candidates similar to a yet further motion vector pointing to a centre of the further search region. Then, the motion vector resembles the motion presumed by the HVS.
    Type: Application
    Filed: December 10, 2010
    Publication date: September 26, 2013
    Applicant: Thomson Licensing
    Inventors: Xiaodong Gu, Debing Liu, Zhibo Chen
  • Publication number: 20130120587
    Abstract: The present invention provides a method and corresponding apparatus for measuring the quality of a video sequence. The video sequence is comprised of a plurality of frames, among which one or more consecutive frames are lost. During the displaying of the video sequence, said one or more lost frames are substituted by an immediate preceding frame in the video sequence during a period from the displaying of said immediate preceding frame to that of an immediate subsequent frame of said one or more lost frames. The method comprises: measuring the quality of the video sequence as a function of a first parameter relating to the stability of said immediate preceding frame during said period, a second parameter relating to the continuity between said immediate preceding frame and said immediate subsequent frame, and a third parameter relating to the coherent motions of the video sequence.
    Type: Application
    Filed: July 30, 2010
    Publication date: May 16, 2013
    Applicant: Thomson Licensing
    Inventors: Xiaodong Gu, Debing Liu, Zhibo Chen