Patents by Inventor Zicheng Liu

Zicheng 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: 20120306995
    Abstract: A system facilitates managing one or more devices utilized for communicating data within a telepresence session. A telepresence session can be initiated within a communication framework that includes a first user and one or more second users. In response to determining a temporary absence of the first user from the telepresence session, a recordation of the telepresence session is initialized to enable a playback of a portion or a summary of the telepresence session that the first user has missed.
    Type: Application
    Filed: August 13, 2012
    Publication date: December 6, 2012
    Applicant: Microsoft Corporation
    Inventors: Christian Huitema, William A.S. Buxton, Jonathan E. Paff, Zicheng Liu, Rajesh Kutpadi Hegde, Zhengyou Zhang, Kori Marie Quinn, Jin Li, Michel Pahud
  • Publication number: 20120281059
    Abstract: The subject disclosure is directed towards an immersive conference, in which participants in separate locations are brought together into a common virtual environment (scene), such that they appear to each other to be in a common space, with geometry, appearance, and real-time natural interaction (e.g., gestures) preserved. In one aspect, depth data and video data are processed to place remote participants in the common scene from the first person point of view of a local participant. Sound data may be spatially controlled, and parallax computed to provide a realistic experience. The scene may be augmented with various data, videos and other effects/animations.
    Type: Application
    Filed: May 4, 2011
    Publication date: November 8, 2012
    Inventors: Philip A. Chou, Zhengyou Zhang, Cha Zhang, Dinei A. Florencio, Zicheng Liu, Rajesh K. Hegde, Nirupama Chandrasekaran
  • Patent number: 8276195
    Abstract: Described herein is a method that includes receiving multiple requests for access to an exposed media object, wherein the exposed media object represents a live media stream that is being generated by a media source. The method also includes receiving data associated with each entity that provided a request, and determining, for each entity, whether the entities that provided the request are authorized to access the media stream based at least in part upon the received data and splitting the media stream into multiple media streams, wherein a number of media streams corresponds to a number of authorized entities. The method also includes automatically applying at least one policy to at least one of the split media streams based at least in part upon the received data.
    Type: Grant
    Filed: January 2, 2008
    Date of Patent: September 25, 2012
    Assignee: Microsoft Corporation
    Inventors: Rajesh K. Hegde, Cha Zhang, Philip A. Chou, Zicheng Liu
  • Patent number: 8253774
    Abstract: The claimed subject matter provides a system and/or a method that facilitates managing one or more devices utilized for communicating data within a telepresence session. A telepresence session can be initiated within a communication framework that includes two or more virtually represented users that communicate therein. A device can be utilized by at least one virtually represented user that enables communication within the telepresence session, the device includes at least one of an input to transmit a portion of a communication to the telepresence session or an output to receive a portion of a communication from the telepresence session. A detection component can adjust at least one of the input related to the device or the output related to the device based upon the identification of a cue, the cue is at least one of a movement detected, an event detected, or an ambient variation.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: August 28, 2012
    Assignee: Microsoft Corporation
    Inventors: Christian Huitema, William A. S. Buxton, John E. Paff, Zicheng Liu, Rajesh Kutpadi Hegde, Zhengyou Zhang, Kori Marie Quinn, Jin Li, Michel Pahud
  • Patent number: 8200681
    Abstract: A media recommendation and sharing technique that employs agents on media players/devices to expand the scope of media sharing scenarios. The technique assists a user in discovering media items, such as, for example, music, recordings, play lists, pictures, video games, on nearby media players or devices (devices which are capable of receiving, storing and playing media) which are interesting to the user. The collaborative media recommendation and sharing technique contemporaneously determines a user's media preferences based on media stored on a pair of media devices and recommends media for potential sharing based on these determined user preferences.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: June 12, 2012
    Assignee: Microsoft Corp.
    Inventors: Rajesh Hedge, Zicheng Liu, Li-wei He, Philip Chou, Christopher Meek
  • Patent number: 8180465
    Abstract: A system that facilitates managing resources (e.g., functionality, services) based at least in part upon an established context. More particularly, a context determination component can be employed to establish a context by processing sensor inputs or learning/inferring a user action/preference. Once the context is established via context determination component, a power/mode management component can be employed to activate and/or mask resources in accordance with the established context. The power and mode management of the device can extend life of a power source (e.g., battery) and mask functionality in accordance with a user and/or device state.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: May 15, 2012
    Assignee: Microsoft Corporation
    Inventors: Michael J. Sinclair, David W. Williams, Zhengyou Zhang, Zicheng Liu
  • Patent number: 8175382
    Abstract: Image enhancement techniques are described to enhance an image in accordance with a set of training images. In an implementation, an image color tone map is generated for a facial region included in an image. The image color tone map may be normalized to a color tone map for a set of training images so that the image color tone map matches the map for the training images. The normalized color tone map may be applied to the image to enhance the in-question image. In further implementations, the procedure may be updated when the average color intensity in non-facial regions differs from an accumulated mean by a threshold amount.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: May 8, 2012
    Assignee: Microsoft Corporation
    Inventors: Zicheng Liu, Cha Zhang, Zhengyou Zhang
  • Patent number: 8144896
    Abstract: A system that facilitates blind source separation in a distributed microphone meeting environment for improved teleconferencing. Input sensor (e.g., microphone) signals are transformed to the frequency-domain and independent component analysis is applied to compute estimates of frequency-domain processing matrices. Modified permutations of the processing matrices are obtained based upon a maximum magnitude based de-permutation scheme. Estimates of the plurality of source signals are provided based upon the modified frequency-domain processing matrices and input sensor signals. Optionally, segments during which the set of active sources is a subset of the set of all sources can be exploited to compute more accurate estimates of frequency-domain mixing matrices. Source activity detection can be applied to determine which speaker(s), if any, are active.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: March 27, 2012
    Assignee: Microsoft Corporation
    Inventors: Zicheng Liu, Philip Andrew Chou, Jacek Dmochowski
  • Patent number: 8140715
    Abstract: A virtual media device is described for processing one or more input signals from one or more physical media input devices, to thereby generate an output signal for use by a consuming application module. The consuming application module interacts with the virtual media device as if it were a physical media input device. The virtual media device thereby frees the application module and its user from the burden of having to take specific account of the physical media input devices that are connected to a computing environment. The virtual media device can be coupled to one or more microphone devices, one or more video input devices, or a combination of audio and video input devices, etc. The virtual media device can apply any number of processing modules to generate the output signal, each performing a different respective operation.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: March 20, 2012
    Assignee: Microsoft Corporation
    Inventors: Zicheng Liu, Rajesh K. Hegde, Philip A. Chou
  • Publication number: 20120045092
    Abstract: Described is a technology by which video, which may be relatively high-resolution video, is efficiently processed to determine whether the video contains a specified action. The video corresponds to a spatial-temporal volume. The volume is searched with a top-k search that finds a plurality of the most likely sub-volumes simultaneously in a single search round. The score volumes of larger spatial resolution videos may be down-sampled into lower-resolution score volumes prior to searching.
    Type: Application
    Filed: August 17, 2010
    Publication date: February 23, 2012
    Inventors: Zicheng Liu, Norberto Adrian Goussies
  • Publication number: 20110311137
    Abstract: Described is a hierarchical filtered motion field technology such as for use in recognizing actions in videos with crowded backgrounds. Interest points are detected, e.g., as 2D Harris corners with recent motion, e.g. locations with high intensities in a motion history image (MHI). A global spatial motion smoothing filter is applied to the gradients of MHI to eliminate low intensity corners that are likely isolated, unreliable or noisy motions. At each remaining interest point, a local motion field filter is applied to the smoothed gradients by computing a structure proximity between sets of pixels in the local region and the interest point. The motion at a pixel/pixel set is enhanced or weakened based on its structure proximity with the interest point (nearer pixels are enhanced).
    Type: Application
    Filed: June 22, 2010
    Publication date: December 22, 2011
    Inventors: Zicheng Liu, Yingli Tian, Liangliang Cao, Zhengyou Zhang
  • Publication number: 20110305366
    Abstract: Described is providing an action model (classifier) for automatically detecting actions in video clips, in which unlabeled data of a target dataset is used to adaptively train the action model based upon similar actions in a labeled source dataset. The target dataset comprising unlabeled video data is processed into a background model. The action model is generated from the background model using a source dataset comprising labeled data for an action of interest. The action model is iteratively refined, generally by fixing a current instance of the action model and using the current instance of the action model to search for a set of detected regions (subvolumes), and then fixing the set of subvolumes and updating the current instance of the action model based upon the set of subvolumes, and so on, for a plurality of iterations.
    Type: Application
    Filed: June 14, 2010
    Publication date: December 15, 2011
    Inventors: Zicheng Liu, Liangliang Cao
  • Patent number: 8079079
    Abstract: A multimodal system that employs a plurality of sensing modalities which can be processed concurrently to increase confidence in connection with authentication. The multimodal system and/or set of various devices can provide several points of information entry in connection with authentication. Authentication can be improved, for example, by combining face recognition, biometrics, speech recognition, handwriting recognition, gait recognition, retina scan, thumb/hand prints, or subsets thereof. Additionally, portable multimodal devices (e.g., a smartphone) can be used as credit cards, and authentication in connection with such use can mitigate unauthorized transactions.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: December 13, 2011
    Assignee: Microsoft Corporation
    Inventors: Zhengyou Zhang, David W. Williams, Yuan Kong, Zicheng Liu, David Kurlander, Mike Sinclair
  • Patent number: 8031967
    Abstract: A video noise reduction technique is presented. Generally, the technique involves first decomposing each frame of the video into low-pass and high-pass frequency components. Then, for each frame of the video after the first frame, an estimate of a noise variance in the high pass component is obtained. The noise in the high pass component of each pixel of each frame is reduced using the noise variance estimate obtained for the frame under consideration, whenever there has been no substantial motion exhibited by the pixel since the last previous frame. Evidence of motion is determined by analyzing the high and low pass components.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: October 4, 2011
    Assignee: Microsoft Corporation
    Inventors: Cha Zhang, Zhengyou Zhang, Zicheng Liu
  • Patent number: 8009880
    Abstract: A subregion-based image parameter recovery system and method for recovering image parameters from a single image containing a face taken under sub-optimal illumination conditions. The recovered image parameters (including albedo, illumination, and face geometry) can be used to generate face images under a new lighting environment. The method includes dividing the face in the image into numerous smaller regions, generating an albedo morphable model for each region, and using a Markov Random Fields (MRF)-based framework to model the spatial dependence between neighboring regions. Different types of regions are defined, including saturated, shadow, regular, and occluded regions. Each pixel in the image is classified and assigned to a region based on intensity, and then weighted based on its classification.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: August 30, 2011
    Assignee: Microsoft Corporation
    Inventors: Zhengyou Zhang, Zicheng Liu, Gang Hua, Yang Wang
  • Patent number: 7991607
    Abstract: Architecture that combines capture and translation of concepts, goals, needs, locations, objects, locations, and items (e.g., sign text) into complete conversational utterances that take a translation of the item, and morph it with fluidity into sets of sentences that can be echoed to a user, and that the user can select to communicate speech (or textual utterances). A plurality of modalities that process images, audio, video, searches and cultural context, for example, which are representative of at least context and/or content, and can be employed to glean additional information regarding a communications exchange to facilitate more accurate and efficient translation. Gesture recognition can be utilized to enhance input recognition, urgency, and/or emotional interaction, for example. Speech can be used for document annotation. Moreover, translation (e.g., speech to speech, text to speech, speech to text, handwriting to speech, text or audio, . . .
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: August 2, 2011
    Assignee: Microsoft Corporation
    Inventors: Zhengyou Zhang, David W. Williams, Yuan Kong, Zicheng Liu
  • Patent number: 7957532
    Abstract: A network-based data protection scheme for a mobile device utilizes encryption techniques and a remote key server that stores encryption keys on behalf of the mobile device. The mobile device stores encrypted data, preferably having no unencrypted counterpart stored therewith. On an as-needed basis, the mobile device requests a decryption key (or an encrypted version of a decryption key) from the key server, where the decryption key can be used by the mobile device to decrypt the encrypted information. The key server transmits the decryption key to the mobile device after authenticating the user of the mobile device.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: June 7, 2011
    Assignee: Microsoft Corporation
    Inventors: Yuqun Chen, Zicheng Liu, Mariusz H. Jakubowski, Yacov Yacobi
  • Publication number: 20110096135
    Abstract: Described is labeling a video session with metadata representing a recognized person or object, such as to identify a person corresponding to a recognized face when that face is being shown during the video session. The identification may be made by overlaying text on the video session, e.g., the person's name and/or other related information. Facial recognition and/or other (e.g., voice) recognition may be used to identify a person. The facial recognition process may be made more efficient by using known narrowing information, such as calendar information that indicates who the invitees are to a meeting that is being shown in the video session.
    Type: Application
    Filed: October 23, 2009
    Publication date: April 28, 2011
    Applicant: Microsoft Corporation
    Inventors: Rajesh Kutpadi Hegde, Zicheng Liu
  • Patent number: 7930178
    Abstract: A frame of a speech signal is converted into the spectral domain to identify a plurality of frequency components and an energy value for the frame is determined. The plurality of frequency components is divided by the energy value for the frame to form energy-normalized frequency components. A model is then constructed from the energy-normalized frequency components and can be used for speech recognition and speech enhancement.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: April 19, 2011
    Assignee: Microsoft Corporation
    Inventors: Zhengyou Zhang, Alejandro Acero, Amarnag Subramanya, Zicheng Liu
  • Patent number: 7924655
    Abstract: An energy based technique to estimate the positions of people speaking from an ad hoc network of microphones. The present technique does not require accurate synchronization of the microphones. In addition, a technique to normalize the gains of the microphones based on people's speech is presented, which allows aggregation of various audio channels from the ad hoc microphone network into a single stream for audio conferencing. The technique is invariant of the speaker's volumes thus making the system easy to deploy in practice.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: April 12, 2011
    Assignee: Microsoft Corp.
    Inventors: Zicheng Liu, Zhengyou Zhang, Li-wei He, Philip A. Chou, Minghua Chen