Patents by Inventor Yongjun Wu

Yongjun Wu 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).

  • Patent number: 10743004
    Abstract: Techniques are described that enable virtual reality content to be delivered using a video codec that operates according to a scalable video encoding standard. These techniques include selectively downloading and decoding frames of video content.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: August 11, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Charles Benjamin Franklin Waggoner, Yongjun Wu
  • Patent number: 10743003
    Abstract: Techniques are described that enable virtual reality content to be delivered using a video codec that operates according to a scalable video encoding standard. These techniques include selectively downloading and decoding frames of video content.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: August 11, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Charles Benjamin Franklin Waggoner, Yongjun Wu
  • Patent number: 10728568
    Abstract: Techniques are described for adaptive encoding of different visual elements in a video frame. Characteristics of visual elements can be determined and used to set encoding parameters for the visual elements. The visual elements can be encoded such that one visual element is encoded differently than another visual element if they have different characteristics.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: July 28, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Charles Benjamin Franklin Waggoner, Yongjun Wu, Hai Wei
  • Patent number: 10715847
    Abstract: A media processing tool adds custom data to an elementary media bitstream or media container. The custom data indicates nominal range of samples of media content, but the meaning of the custom data is not defined in the codec format or media container format. For example, the custom data indicates the nominal range is full range or limited range. For playback, a media processing tool parses the custom data and determines an indication of media content type. A rendering engine performs color conversion operations whose logic changes based at least in part on the media content type. In this way, a codec format or media container format can in effect be extended to support full nominal range media content as well as limited nominal range media content, and hence preserve full or correct color fidelity, while maintaining backward compatibility and conformance with the codec format or media container format.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: July 14, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Yongjun Wu, Naveen Thumpudi, Shyam Sadhwani
  • Patent number: 10701401
    Abstract: Syntax structures that indicate the completion of coded regions of pictures are described. For example, a syntax structure in an elementary bitstream indicates the completion of a coded region of a picture. The syntax structure can be a type of network abstraction layer unit, a type of supplemental enhancement information message or another syntax structure. For example, a media processing tool such as an encoder can detect completion of a coded region of a picture, then output, in a predefined order in an elementary bitstream, syntax structure(s) that contain the coded region as well as a different syntax structure that indicates the completion of the coded region. Another media processing tool such as a decoder can receive, in a predefined order in an elementary bitstream, syntax structure(s) that contain a coded region of a picture as well as a different syntax structure that indicates the completion of the coded region.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: June 30, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Yongjun Wu, Lihua Zhu, Shyam Sadhwani, Gary J. Sullivan
  • Patent number: 10694238
    Abstract: Methods and apparatus are described for estimating the peak bit rate for content and specifying the BANDWIDTH tag value for HLS content. This disclosure also describes techniques by which live content and VOD content can be stitched together in a way that harmonizes the different requirements for the BANDWIDTH tag for the different types of content.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: June 23, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Avinash Priya Khurana, Timothy Prins, Yongjun Wu
  • Publication number: 20200196414
    Abstract: An elongated lamp tube has an elongated tube shell, two caps, a LED light source, a first power supply circuit, a second power supply circuit and a frequency switch circuit. The elongated lamp tube may be connected to first electrodes of a lamp fixture without a ballast or a lamp fixture with a ballast. The ballast converts an external power of an industrial frequency to a converted power of a working frequency. The frequency switch circuit is connected to the first power supply and the second power supply for blocking one of the first power supply circuit and the second power supply to supply driving current to the LED light source according to an input frequency of a received power.
    Type: Application
    Filed: February 23, 2020
    Publication date: June 18, 2020
    Inventors: Qi Liu, Qiyuan Wang, Zongyan Liu, Cantian Wu, Wei Liu, Yongjun Bao
  • Publication number: 20200186848
    Abstract: Methods and apparatus are described for making broadcast content available as an on-demand asset soon after all of the video fragments of the broadcast content have been made available. As the video fragments of the broadcast content are made available, they are requested and archived. When all of the fragments for the duration of the broadcast content are available (e.g., a live event ends), a VOD-style manifest is generated and the archived fragments are made available for downloading or streaming using the VOD-style manifest.
    Type: Application
    Filed: January 28, 2019
    Publication date: June 11, 2020
    Inventors: Ravindra Ganti, . Parminder Singh, John F.X. Gaquin, Michael James Montgomery, Charles M. Cordova, Yongjun Wu
  • Patent number: 10681104
    Abstract: Techniques are described for handling offsets (gaps or overlaps) that occur between segments of streaming content, e.g., between a segment of primary content (e.g., a live sporting event) and a segment of secondary content (e.g., ad content) dynamically inserted into the stream. The effect of such offsets can be that synchronization between the video and audio portions of the stream can be lost. By tracking a cumulative offset derived from the audio portion of the stream and applying that offset to the presentation times of each affected sample of both the audio and video portions of the stream, synchronization of the audio and video is maintained.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: June 9, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Yongjun Wu, Henry Liu, Amritaansh Verma
  • Patent number: 10666903
    Abstract: Techniques are described by which multiple, independently encoded video streams may be combined into a single decodable video stream. These techniques take advantage of existing features of commonly used video codecs that support the independent encoding of different regions of an image frame (e.g., H.264 slices or HEVC tiles). Instead of including different parts of the same image, each region corresponds to the encoded image data of the frames of one of the independent video streams.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: May 26, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Yongjun Wu, Charles Benjamin Franklin Waggoner, Patrik Schnell
  • Patent number: 10638180
    Abstract: Techniques are described for handling temporal overlaps that occur between fragments of streaming media content, such as between a fragment of primary media content (e.g., a live sporting event) and a fragment of secondary media content (e.g., ad media content) dynamically inserted into the stream.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: April 28, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Christopher Steven Mark Pringle, Mairo Pedrini, Yongjun Wu
  • Patent number: 10616964
    Abstract: An elongated lamp tube has an elongated tube shell, two caps, a LED light source, a first power supply circuit, a second power supply circuit and a frequency switch circuit. The elongated lamp tube may be connected to first electrodes of a lamp fixture without a ballast or a lamp fixture with a ballast. The ballast converts an external power of an industrial frequency to a converted power of a working frequency. The frequency switch circuit is connected to the first power supply and the second power supply for blocking one of the first power supply circuit and the second power supply to supply driving current to the LED light source according to an input frequency of a received power.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: April 7, 2020
    Assignee: XIAMEN ECO LIGHTING CO. LTD.
    Inventors: Qi Liu, Qiyuan Wang, Zongyan Liu, Cantian Wu, Wei Liu, Yongjun Bao
  • Patent number: 10609440
    Abstract: Techniques are described for detecting timing data anomalies in streaming video. Techniques are also described for adjusting playback operations based on detecting possible timing data anomalies.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: March 31, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Yongjun Wu, Ilya Vladimirovich Brailovskiy
  • Patent number: 10609356
    Abstract: Techniques are described that enable stereoscopic content to be delivered. These techniques including encoding frames of stereoscopic video content within a base layer and temporal enhancement layer and decoding the encoded frames.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: March 31, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Charles Benjamin Franklin Waggoner, Yongjun Wu
  • Patent number: 10593122
    Abstract: Techniques are described that enable a two-dimensional (2D) representation of three-dimensional (3D) virtual reality content to be generated and encoded. These techniques include modifying non-display pixels within the 2D representation to soften the transitions between display pixels and non-display pixels.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: March 17, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Charles Benjamin Franklin Waggoner, Yongjun Wu
  • Patent number: 10595055
    Abstract: Techniques are described for providing media presentations that include content originating from multiple sources in ways that are effectively transparent to end user devices. Manifest data provided to an end user device include a key encoded in the URL for each of the content fragments. The key encodes one or more interstitial periods of secondary content within the overall presentation of primary content. When a media server receives a content request from the end user device, the media server determines from the key encoded in the URL and the range of content requested whether the request corresponds to the primary content or the secondary content.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: March 17, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Tarun Jindal, Ron Searl, Kyle Alexander Woo, Abhishek Kumar, Yongjun Wu
  • Patent number: 10580167
    Abstract: Techniques are described that enable a two-dimensional (2D) representation of three-dimensional (3D) virtual reality (VR) content to be encoded. These techniques include encoding VR content while excluding non-display pixels of the VR content from motion estimation during encoder processing.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: March 3, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Charles Benjamin Franklin Waggoner, Yongjun Wu
  • Patent number: 10553029
    Abstract: Techniques are described that enable virtual reality content to be delivered. These techniques include encoding frames of stereoscopic virtual reality content and decoding reference frames of the stereoscopic virtual reality content for non-viewed sections of the virtual reality content.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: February 4, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Charles Benjamin Franklin Waggoner, Yongjun Wu
  • Patent number: 10526258
    Abstract: The present invention provides a process for producing butadiene by oxidative dehydrogenation of butylene, comprising: a reaction stage, wherein a multi-stage adiabatic fixed bed in series is used, wherein butylene, oxygen-comprising gas and water are reacted in the presence of a catalyst in each stage of the adiabatic fixed bed with the first stage of the adiabatic fixed bed being further separately fed a diluent, being nitrogen and/or carbon dioxide, and the molar ratio between this separately fed diluents and the oxygen of all the oxygen-comprising gases fed in the subsequent stage(s) of the adiabatic fixed bed being controlled, wherein the oxygen-comprising gas is air, oxygen-enriched air or oxygen, and at least one of all the oxygen-comprising gases fed in the subsequent stage(s) of the adiabatic fixed bed is oxygen-enriched air having a specific oxygen concentration or oxygen; and a post treatment stage, wherein the effluent from the last stage of the adiabatic fixed bed is treated to obtain a product b
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: January 7, 2020
    Assignee: WISON ENGINEERING LTD.
    Inventors: Wenshu Yang, Yongjun Wu, Yansheng Li
  • Patent number: 10523953
    Abstract: Video frames of a higher-resolution chroma sampling format such as YUV 4:4:4 are packed into video frames of a lower-resolution chroma sampling format such as YUV 4:2:0 for purposes of video encoding. For example, sample values for a frame in YUV 4:4:4 format are packed into two frames in YUV 4:2:0 format. After decoding, the video frames of the lower-resolution chroma sampling format can be unpacked to reconstruct the video frames of the higher-resolution chroma sampling format. In this way, available encoders and decoders operating at the lower-resolution chroma sampling format can be used, while still retaining higher resolution chroma information. In example implementations, frames in YUV 4:4:4 format are packed into frames in YUV 4:2:0 format such that geometric correspondence is maintained between Y, U and V components for the frames in YUV 4:2:0 format.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: December 31, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Lihua Zhu, Sridhar Sankuratri, B. Anil Kumar, Yongjun Wu, Sandeep Kanumuri, Shyam Sadhwani, Gary J. Sullivan