Patents by Inventor Lifeng Zhao

Lifeng Zhao 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: 20190013020
    Abstract: The present disclosure provides an electronic device-awakening method and apparatus, a device and a computer-readable storage medium. In embodiments of the present disclosure, the user's speech wakeup instruction which is used to awaken the electronic device is obtained, and then an audio data file is selected from at least two audio data files according to the speech wakeup instruction, as a wakeup answer file of the electronic device, so that the wakeup answer file of the electronic device can be played. Since there are more than one selectable audio data files, many types of prompt tones can be provided, thereby achieving the purpose of providing many types of wakeup prompts.
    Type: Application
    Filed: December 28, 2017
    Publication date: January 10, 2019
    Applicant: Baidu Online Network Technology (Beijing) Co., Ltd
    Inventors: Rongjie Chen, Lifeng Zhao, Xiantang Chang, Shiwei Yan
  • Publication number: 20190012134
    Abstract: The present disclosure provides an audio playing method and device. The method may include the following. When a loading speed of a present audio file containing target audio content is changed during the present audio file is played, a target definition for playing the target audio content is determined. It is determined whether to report an audio file acquisition request to a server based on a preset strategy. When it is determined to report the audio file acquisition request to the server, the audio file acquisition request is reported to the server. The audio file acquisition request may include the target definition and an identifier of a target audio file containing the target audio content. An audio playing instruction sent by the server is acquired. The audio playing instruction may include the target audio file corresponding to the identifier and the target definition. The target audio file is played.
    Type: Application
    Filed: June 11, 2018
    Publication date: January 10, 2019
    Inventors: Xiantang CHANG, Lifeng ZHAO, Shiwei YAN
  • Publication number: 20190013021
    Abstract: The present disclosure provides a voice wakeup method, apparatus and system, a cloud server and a readable medium. The method comprises: receiving a first request input by the user in a voice manner after a smart device enters a voice recognition phase; judging whether the first request after semantic parsing is consistent with pre-stored wakeup words; determining that the received first request is used to re-wake up the smart device if the first request is consistent with the pre-stored wakeup words. According to the above technical solutions, after the smart device enters the voice recognition phase, if the received first request is the wakeup words, the smart device does not perform service satisfaction processing for the first request. Capability of recognizing that the first request is re-wakeup does not cause a command recognition error and thereby can satisfy the user's expectation.
    Type: Application
    Filed: December 28, 2017
    Publication date: January 10, 2019
    Applicant: BAIDU ONLINE NETWORK TECHNOLOGY (BEIJING) CO., LTD
    Inventors: Xiantang Chang, Lifeng Zhao, Rongjie Chen
  • Publication number: 20180184689
    Abstract: The present invention discloses a method for preparing controlled release type lutein feed additive. Steps: lutein extract, glycerol and fat are mixed and dissolved, then alkali liquor is dropped under condition of mechanical stirring and sheering emulsification to allow the lutein to be fully saponified. Then fat is added and alkaline saponification is conducted, adjusting the viscosity and neutralizing and conducting spray granulation to the mixed liquor to obtain controlled release lutein feed additive. By utilizing the combined effects of glycerol and fat, the present invention realizes saponification and microcapsule formation using simple method.
    Type: Application
    Filed: June 21, 2016
    Publication date: July 5, 2018
    Inventors: DAN QIU, ZHIRONG CHEN, LIFANG SHI, JIANDONG LI, LINPU CAI, YUFENG LIANG, MINCONG CAI, LIFENG ZHAO
  • Publication number: 20130146739
    Abstract: An umbrella base comprises one or more identical sector-shaped base boxes that can be filled with heavy filling material (e.g., sand), the identical sector-shaped base boxes are attached to each other and placed on a formation of elongated base members of an umbrella to hold the umbrella in an upright position. When the umbrella base is not in use, the base boxes can be emptied and separated, and the identical sector-shaped boxes may be disassembled and stacked on top of one another. The overall dimension of the sector-shaped boxes when stacked is compact which allows the umbrella and the umbrella base together to fit inside the umbrella package.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 13, 2013
    Inventor: Lifeng Zhao
  • Publication number: 20120024331
    Abstract: The present invention uses special fastening brackets to assemble a canopy. The fastening brackets are uniquely shaped so it could bind the metal bars together without the need to drill holes through them, thereby causing the need to match the holes. Therefore, as the canopy changes its shapes as it is being used, the assembling would not be a problem.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 2, 2012
    Inventor: Lifeng Zhao
  • Patent number: 7406124
    Abstract: The invention is related to methods and apparatus that can advantageously be used in a video encoder to improve picture quality, to improve the speed of encoding, and the like. One embodiment of the invention advantageously computes activity measures using an efficient L1-norm, which can advantageously be relatively quickly computed by selected microprocessors. Another embodiment of the invention advantageously allocates bits to macroblocks of a picture based at least in part on the motion activities of the macroblocks.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: July 29, 2008
    Assignee: Intervideo, Inc.
    Inventors: Lifeng Zhao, Ioannis Katsavounidis, Kuo-Wei Hsu
  • Patent number: 7388912
    Abstract: Methods and apparatus are provided to advantageously improve bit rate control in a video encoder, such as an MPEG video encoder. The targeted bit allocation for a picture to be encoded is advantageously varied based on an occupancy level of a buffer model, such as a video buffer verifier (VBV) buffer model.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: June 17, 2008
    Assignee: Intervideo, Inc.
    Inventors: Ioannis Katsavounidis, Kuo-Wei Hsu, Lifeng Zhao
  • Publication number: 20080123738
    Abstract: The invention is related to methods and apparatus that advantageously improve bit rate control in a video encoder, such as an MPEG video encoder. One embodiment of the invention advantageously varies the targeted bit allocation for a picture to be encoded based on an occupancy level of a buffer model, such as a video buffer verifier (VBV) buffer model.
    Type: Application
    Filed: January 29, 2008
    Publication date: May 29, 2008
    Inventors: Ioannis Katsavounidis, Kuo-Wei Hsu, Lifeng Zhao
  • Patent number: 7221706
    Abstract: The present invention is related to video encoding. In an embodiment, a bit budget is calculated for a first scene. In addition, bit budgets for corresponding frames, including at least a first frame, within the first scene are determined. Optionally, bit budgets corresponding to macroblocks within the first frame are also determined.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: May 22, 2007
    Assignee: Intervideo, Inc.
    Inventors: Lifeng Zhao, Ioannis Katsavounidis
  • Patent number: 7164717
    Abstract: The present invention is related to video encoding. In an embodiment, a first root mean squared (RMS) value is calculated for a first frame relative to a second frame, and a second frame relative to a third frame. A second temporal derivative RMS value is calculated. Based at least in part on the second derivative value, the second frame is designated as a scene change frame.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: January 16, 2007
    Assignee: Intervideo, Inc.
    Inventors: Ioannis Katsavounidis, Chang-Su Kim, Lifeng Zhao
  • Patent number: 7110452
    Abstract: The present invention is related to video encoding. In an embodiment, a first root mean squared (RMS) value is calculated for a first frame relative to a second frame, and a second frame relative to a third frame. A second temporal derivative RMS value is calculated. Based at least in part on the second derivative value, the second frame is designated as a scene change frame.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: September 19, 2006
    Assignee: Intervideo, Inc.
    Inventors: Ioannis Katsavounidis, Chang-Su Kim, Lifeng Zhao
  • Patent number: 6970506
    Abstract: The present invention is related to video encoding. In an embodiment, a sequence of frames is received. For each frame in at least a portion of the sequence of frames, a corresponding mean of absolute differences value weighted by a temporal parameter between frames bracketing said each frame is calculated. At least partly based on the corresponding mean of absolute differences value weighted by a temporal parameter, a first frame in the sequence of frames is skipped.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: November 29, 2005
    Assignee: Intervideo, Inc.
    Inventors: Chang-Su Kim, Ioannis Katsavounidis, Lifeng Zhao
  • Patent number: 6944224
    Abstract: The invention is related to methods and apparatus that provide improved video encoding. Conventional video encoding techniques inadequately determine the encoding mode for a macroblock. One embodiment according to the invention advantageously includes the coding cost for motion vectors into the mode decision, thereby enhancing the quality of the selection of the mode. One embodiment further uses an L1 norm in the decision, thereby advantageously reducing the computational complexity of taking the coding cost for motion vectors into the mode decision.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: September 13, 2005
    Assignee: Intervideo, Inc.
    Inventors: Lifeng Zhao, Ioannis Katsavounidis
  • Patent number: 6940903
    Abstract: The present invention is related to video encoding. In an embodiment, a bit budget is calculated for a first scene. In addition, bit budgets for corresponding frames, including at least a first frame, within the first scene are determined. Optionally, bit budgets corresponding to macroblocks within the first frame are also determined.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: September 6, 2005
    Assignee: Intervideo, Inc.
    Inventors: Lifeng Zhao, Ioannis Katsavounidis
  • Publication number: 20050123044
    Abstract: The present invention is related to video encoding. In an embodiment, a first root mean squared (RMS) value is calculated for a first frame relative to a second frame, and a second frame relative to a third frame. A second temporal derivative RMS value is calculated. Based at least in part on the second derivative value, the second frame is designated as a scene change frame.
    Type: Application
    Filed: January 14, 2005
    Publication date: June 9, 2005
    Inventors: Ioannis Katsavounidis, Chang-Su Kim, Lifeng Zhao
  • Publication number: 20050089091
    Abstract: The present invention is related to video encoding. In an embodiment, a sequence of frames is received. For each frame in at least a portion of the sequence of frames, a corresponding mean of absolute differences value weighted by a temporal parameter between frames bracketing said each frame is calculated. At least partly based on the corresponding mean of absolute differences value weighted by a temporal parameter, a first frame in the sequence of frames is skipped.
    Type: Application
    Filed: November 17, 2004
    Publication date: April 28, 2005
    Inventors: Chang-Su Kim, Ioannis Katsavounidis, Lifeng Zhao
  • Publication number: 20050058199
    Abstract: The present invention is related to video encoding. In an embodiment, a bit budget is calculated for a first scene. In addition, bit budgets for corresponding frames, including at least a first frame, within the first scene are determined. Optionally, bit budgets corresponding to macroblocks within the first frame are also determined.
    Type: Application
    Filed: October 4, 2004
    Publication date: March 17, 2005
    Inventors: Lifeng Zhao, Ioannis Katsavounidis
  • Publication number: 20050025249
    Abstract: The invention is related to methods and apparatus that provide improved video encoding. Conventional video encoding techniques inadequately determine the encoding mode for a macroblock. One embodiment according to the invention advantageously includes the coding cost for motion vectors into the mode decision, thereby enhancing the quality of the selection of the mode. One embodiment further uses an L1 norm in the decision, thereby advantageously reducing the computational complexity of taking the coding cost for motion vectors into the mode decision.
    Type: Application
    Filed: August 14, 2003
    Publication date: February 3, 2005
    Inventors: Lifeng Zhao, Ioannis Katsavounidis
  • Publication number: 20040252758
    Abstract: The invention is related to methods and apparatus that provide selective filtering of discrete cosine transform (DCT) coefficients. Advantageously, filtering of the DCT coefficients is efficiently performed in the frequency domain, rather than the processing intensive pixel domain (time domain). The DCT filtering is performed “in-loop ” to the DCT encoding and not in a preprocessing approach that is independent to encoding loop. The DCT filtering advantageously reduces the number of bits used to encode a picture, which can preserve compliance with occupancy levels for buffer models while improving picture quality over a conventional technique to preserve bits, such as an increase in the value of the quantization parameter QP.
    Type: Application
    Filed: August 14, 2003
    Publication date: December 16, 2004
    Inventors: Ioannis Katsavounidis, Lifeng Zhao