Patents by Inventor Kyeong Ho Yang

Kyeong Ho Yang 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: 10714499
    Abstract: The method of manufacturing a semiconductor device include: forming conductive patterns in interlayer spaces between interlayer insulating layers, the conductive patterns being separated from each other by a slit passing through the interlayer insulating layers, wherein the conductive patterns include a first by-product; generating a second by-product of a gas phase by reacting the first by-product remaining in the conductive patterns with source gas; and performing an out-gassing process to remove the second by-product.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: July 14, 2020
    Assignee: SK hynix Inc.
    Inventors: Won Joon Choi, Min Sung Ko, Kyeong Bae Kim, Jong Gi Kim, Dong Sun Sheen, Jung Myoung Shim, Young Ho Yang, Hyeng Woo Eom, Kwang Wook Lee, Woo Jae Chung
  • Publication number: 20200169694
    Abstract: Techniques for handling sudden changes in available bandwidth in videoconferences implemented with media servers employing SFUs. The techniques involve detecting a sudden drop in available egress network bandwidth from a media server to a video receiver, sending a request to a video sender currently sending a video stream to the media server for forwarding to the video receiver to reduce its transmission bitrate, determining whether to reset the forwarding of the video stream to the video receiver, and, having determined to reset the forwarding of the video stream to the video receiver, stopping the forwarding of the video stream to the video receiver, sending a request for an I-frame to the video sender for use in restarting the forwarding of the video stream to the video receiver, and, having received the requested I-frame, restarting the forwarding of the video stream from the video sender to the video receiver.
    Type: Application
    Filed: September 12, 2019
    Publication date: May 28, 2020
    Inventors: Kyeong Ho Yang, Yisheng Zhao
  • Patent number: 10609420
    Abstract: Improved systems and methods of video decoding and recording in real-time video communications for use in lossy network environments. The disclosed systems and methods can employ a plurality of wait time thresholds for retransmission of missing video packets, based at least on the processing performed on the respective video packets, such processing including video decoding in a real-time video communication between client devices, and video recording and storing in a video file. The disclosed system and methods can also adaptively perform error concealment on video frames in the bitstream domain prior to recording and storing encoded video frame data in a video file, based at least on estimates of the complexities of the respective video frames.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: March 31, 2020
    Assignee: Dialogic Corporation
    Inventor: Kyeong Ho Yang
  • Patent number: 10582222
    Abstract: Improved systems and methods of video decoding and recording in real-time video communications for use in lossy network environments. The disclosed systems and methods can employ a plurality of wait time thresholds for retransmission of missing video packets, based at least on the processing performed on the respective video packets, such processing including video decoding in a real-time video communication between client devices, and video recording and storing in a video file. The disclosed system and methods can also adaptively perform error concealment on video frames in the bitstream domain prior to recording and storing encoded video frame data in a video file, based at least on estimates of the complexities of the respective video frames.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: March 3, 2020
    Assignee: DIALOGIC CORPORATION
    Inventors: Kyeong Ho Yang, Yisheng Zhao
  • Patent number: 10455194
    Abstract: Techniques for handling sudden changes in available bandwidth in videoconferences implemented with media servers employing SFUs. The techniques involve detecting a sudden drop in available egress network bandwidth from a media server to a video receiver, sending a request to a video sender currently sending a video stream to the media server for forwarding to the video receiver to reduce its transmission bitrate, determining whether to reset the forwarding of the video stream to the video receiver, and, having determined to reset the forwarding of the video stream to the video receiver, stopping the forwarding of the video stream to the video receiver, sending a request for an I-frame to the video sender for use in restarting the forwarding of the video stream to the video receiver, and, having received the requested I-frame, restarting the forwarding of the video stream from the video sender to the video receiver.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: October 22, 2019
    Assignee: DIALOGIC CORPORATION
    Inventors: Kyeong Ho Yang, Yisheng Zhao
  • Publication number: 20190319045
    Abstract: The method of manufacturing a semiconductor device include: forming conductive patterns in interlayer spaces between interlayer insulating layers, the conductive patterns being separated from each other by a slit passing through the interlayer insulating layers, wherein the conductive patterns include a first by-product; generating a second by-product of a gas phase by reacting the first by-product remaining in the conductive patterns with source gas; and performing an out-gassing process to remove the second by-product.
    Type: Application
    Filed: June 25, 2019
    Publication date: October 17, 2019
    Inventors: Won Joon CHOI, Min Sung KO, Kyeong Bae KIM, Jong Gi KIM, Dong Sun SHEEN, Jung Myoung SHIM, Young Ho YANG, Hyeng Woo EOM, Kwang Wook LEE, Woo Jae CHUNG
  • Patent number: 10373973
    Abstract: The method of manufacturing a semiconductor device include: forming conductive patterns in interlayer spaces between interlayer insulating layers, the conductive patterns being separated from each other by a slit passing through the interlayer insulating layers, wherein the conductive patterns include a first by-product; generating a second by-product of a gas phase by reacting the first by-product remaining in the conductive patterns with source gas; and performing an out-gassing process to remove the second by-product.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: August 6, 2019
    Assignee: SK hynix Inc.
    Inventors: Won Joon Choi, Min Sung Ko, Kyeong Bae Kim, Jong Gi Kim, Dong Sun Sheen, Jung Myoung Shim, Young Ho Yang, Hyeng Woo Eom, Kwang Wook Lee, Woo Jae Chung
  • Publication number: 20190200049
    Abstract: Techniques for providing selective video forwarding in real-time video applications involving multiple user devices. The techniques can be employed in WebRTC videoconferences, taking into account the heterogeneous natures of device display resolutions and networks in which the respective devices operate. The techniques employ a selective forwarding unit (SFU) having a real-time adaptive video transcoder. The SFU determines whether a benefit to quality of experience (QoE) can be achieved by perfonning, in real-time, adaptive video transcoding on large video streams produced by the respective devices. If a heterogeneity value associated with available network bandwidths is greater than a predetermined value and sufficient CPU/memory resources are available, then the real-time adaptive video transcoder performs, in real-time, adaptive video transcoding on the large video streams to produce corresponding small video streams, which are selectively forwarded to user devices having low available network bandwidths.
    Type: Application
    Filed: February 11, 2019
    Publication date: June 27, 2019
    Inventors: Kyeong Ho Yang, Antony R. Martin
  • Patent number: 10334289
    Abstract: Improved systems and methods of performing multimedia communications over multimedia communications networks, in which video data senders can maintain high video quality of experience (QoE) levels with increased reliability despite changes in available bandwidths of video data receivers. In the disclosed systems and methods, video encoding parameters employed by the video data senders, including at least the video frame size and/or the video frame rate, can be dynamically adapted to the available bandwidths of the video data receivers, taking into account possible effects of spatial scaling and/or temporal scaling of video frames on the resulting video QoE.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: June 25, 2019
    Assignee: Dialogic Corporation
    Inventors: Kyeong Ho Yang, Beril Erkin, Antony R. Martin
  • Patent number: 10250921
    Abstract: Systems, methods, and techniques for providing video forwarding in real-time video applications involving multiple devices. The techniques can be employed in WebRTC videoconferences, taking into account the heterogeneous natures of device display resolutions and networks in which the devices operate. The techniques employ a media server including an SFU having an adaptive video transcoder. The media server determines whether a benefit to QoE is achieved by performing video transcoding on large video streams produced by the respective devices. If a heterogeneity value of available network bandwidths is greater than a predetermined value and CPU/memory resources are available, then the adaptive video transcoder beneficially performs transcoding on the large video streams to produce corresponding small video streams, which are selectively forwarded to devices having low available network bandwidths.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: April 2, 2019
    Assignee: Dialogic Corporation
    Inventors: Kyeong Ho Yang, Antony R. Martin
  • Patent number: 10230651
    Abstract: Systems and methods of performing intra-frame refresh in multimedia communications over lossy packet networks, in which a video receiver can provide packet loss feedback information to a video transmitter, and the video transmitter can respond to the feedback information, in a manner that makes efficient use of available bandwidth. By providing one or more PLI messages from the video receiver to the video transmitter based on criteria related to the detection of an eventual missing video packet and/or the determination that the quality of a current reference frame is bad, and by pausing the providing of GNACK messages from the video receiver to the video transmitter while the PLI messages are being provided to the video transmitter, the total number of video packets required for transmission/retransmission can be reduced, thereby limiting the impact of the transmitted/retransmitted video packets on the available bandwidth while enhancing the video QoE of system users.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: March 12, 2019
    Assignee: DIALOGIC CORPORATION
    Inventor: Kyeong Ho Yang
  • Patent number: 10178389
    Abstract: Systems and methods of performing rate control in scalable video encoders for use in videoconferencing, announcements, and live video streaming to multiple participant devices having diverse bandwidths, resolutions, and/or other device characteristics. The systems and methods can accommodate different target bit rates of the multiple participant devices by operating on scalable video bitstreams in a multi-layer video format, including a base layer having one or more reference video frames, and an enhancement layer having one or more disposable non-reference, predictive video frames. By adjusting the number of disposable non-reference, predictive video frames in the enhancement layer, as well as quantization parameters for the respective base and enhancement layers, the systems and methods can accommodate the different target bit rates for the respective participant devices, while enhancing the spatial and/or temporal qualities of the base and enhancement layers in the respective video bitstreams.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: January 8, 2019
    Assignee: DIALOG CORPORATION
    Inventors: Kyeong Ho Yang, Sangseok Park
  • Publication number: 20180367816
    Abstract: Improved systems and methods of video decoding and recording in real-time video communications for use in lossy network environments. The disclosed systems and methods can employ a plurality of wait time thresholds for retransmission of missing video packets, based at least on the processing performed on the respective video packets, such processing including video decoding in a real-time video communication between client devices, and video recording and storing in a video file. The disclosed system and methods can also adaptively perform error concealment on video frames in the bitstream domain prior to recording and storing encoded video frame data in a video file, based at least on estimates of the complexities of the respective video frames.
    Type: Application
    Filed: August 23, 2018
    Publication date: December 20, 2018
    Inventors: Kyeong Ho Yang, Yisheng Zhao
  • Publication number: 20180367817
    Abstract: Improved systems and methods of video decoding and recording in real-time video communications for use in lossy network environments. The disclosed systems and methods can employ a plurality of wait time thresholds for retransmission of missing video packets, based at least on the processing performed on the respective video packets, such processing including video decoding in a real-time video communication between client devices, and video recording and storing in a video file. The disclosed system and methods can also adaptively perform error concealment on video frames in the bitstream domain prior to recording and storing encoded video frame data in a video file, based at least on estimates of the complexities of the respective video frames.
    Type: Application
    Filed: August 23, 2018
    Publication date: December 20, 2018
    Inventor: Kyeong Ho Yang
  • Patent number: 10148598
    Abstract: Systems and methods of handling packet errors associated with multimedia data received at data receivers from data senders, in which packet error feedback information is provided by the data receivers to the data senders in one or more real-time transport control protocol (RTCP) feedback packets. The data receivers can calculate, determine, or otherwise obtain costs associated with providing specific forms of packet error feedback information in the RTCP feedback packets, and further calculate, determine, or otherwise obtain wait times for handling out-of-order packets, as well as receiving retransmissions of lost packets. By handling packet errors associated with multimedia data while taking into account such costs and wait times, each of which can have an impact on system bandwidth and/or latency, the systems and methods can more reliably achieve the quality of experience (QoE) generally desired and/or required for multimedia data transmissions.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: December 4, 2018
    Assignee: Dialogic Corporation
    Inventors: Kyeong Ho Yang, Myo Tun
  • Patent number: 10110930
    Abstract: Improved systems and methods of video decoding and recording in real-time video communications for use in lossy network environments. The disclosed systems and methods can employ a plurality of wait time thresholds for retransmission of missing video packets, based at least on the processing performed on the respective video packets, such processing including video decoding in a real-time video communication between client devices, and video recording and storing in a video file. The disclosed system and methods can also adaptively perform error concealment on video frames in the bitstream domain prior to recording and storing encoded video frame data in a video file, based at least on estimates of the complexities of the respective video frames.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: October 23, 2018
    Assignee: Dialogic Corporation
    Inventors: Kyeong Ho Yang, Yisheng Zhao
  • Publication number: 20180270487
    Abstract: Systems and methods of media servers for estimating the video quality of experience (QoE) of human viewers of video content or communications at video receivers. With these systems and methods, a media server can collect, within a plurality of predetermined time windows synchronized in time, operational parameters of ingress and egress networks over which such video content or communications can be transmitted, as well as coding parameters of a video decoder and a video encoder within the media server. Having collected the operational parameters of the ingress network and egress network and the coding parameters of the video decoder and video encoder, the media server can determine QoE scores associated with some or all the ingress network, the video decoder, the video encoder, and the egress network, and estimate a resulting video QoE for a human viewer at a video receiver as a predefined combination of the respective QoE scores.
    Type: Application
    Filed: May 21, 2018
    Publication date: September 20, 2018
    Inventors: Kyeong Ho Yang, Beril Erkin, Yisheng Zhao
  • Patent number: 10021402
    Abstract: Systems and methods of media servers for estimating the video quality of experience (QoE) of human viewers of video content or communications at video receivers. With these systems and methods, a media server can collect, within a plurality of predetermined time windows synchronized in time, operational parameters of ingress and egress networks over which such video content or communications can be transmitted, as well as coding parameters of a video decoder and a video encoder within the media server. Having collected the operational parameters of the ingress network and egress network and the coding parameters of the video decoder and video encoder, the media server can determine QoE scores associated with some or all the ingress network, the video decoder, the video encoder, and the egress network, and estimate a resulting video QoE for a human viewer at a video receiver as a predefined combination of the respective QoE scores.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: July 10, 2018
    Assignee: Dialogic Corporation
    Inventors: Kyeong Ho Yang, Beril Erkin, Yisheng Zhao
  • Publication number: 20180109823
    Abstract: Improved systems and methods of performing multimedia communications over multimedia communications networks, in which video data senders can maintain high video quality of experience (QoE) levels with increased reliability despite changes in available bandwidths of video data receivers. In the disclosed systems and methods, video encoding parameters employed by the video data senders, including at least the video frame size and/or the video frame rate, can be dynamically adapted to the available bandwidths of the video data receivers, taking into account possible effects of spatial scaling and/or temporal scaling of video frames on the resulting video QoE.
    Type: Application
    Filed: December 18, 2017
    Publication date: April 19, 2018
    Inventors: Kyeong Ho Yang, Beril Erkin, Antony R. Martin
  • Patent number: 9883214
    Abstract: Improved systems and methods of performing multimedia communications over multimedia communications networks, in which video data senders can maintain high video quality of experience (QoE) levels with increased reliability despite changes in available bandwidths of video data receivers. In the disclosed systems and methods, video encoding parameters employed by the video data senders, including at least the video frame size and/or the video frame rate, can be dynamically adapted to the available bandwidths of the video data receivers, taking into account possible effects of spatial scaling and/or temporal scaling of video frames on the resulting video QoE.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: January 30, 2018
    Assignee: DIALOGIC CORPORATION
    Inventors: Kyeong Ho Yang, Beril Erkin, Antony R. Martin