Patents by Inventor Yisheng Zhao
Yisheng 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).
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Patent number: 11959817Abstract: An electromagnetic ultrasonic double wave transducer, comprising a shell (1), and a permanent magnet assembly, a coil (4), a shielding layer (5), and a wire (6) which are provided in the shell (1). The permanent magnet assembly comprises a first permanent magnet (2) and a second permanent magnet (3) sleeved on the first permanent magnet (2). The magnetizing directions of the first permanent magnet (2) and the second permanent magnet (3) are perpendicular to the bottom of the shell (1), and the magnetic field directions of the first permanent magnet (2) and the second permanent magnet (3) are opposite. A non-conducting non-magnetic bushing material (9) is provided between the first permanent magnet (2) and the second permanent magnet (3), and upper end faces of the first permanent magnet (2) and the second permanent magnet (3) realize magnetic circuit closing by means of a magnetic circuit closing element (8).Type: GrantFiled: October 26, 2018Date of Patent: April 16, 2024Assignee: SUZHOU PHASERISE TECHNOLOGY CO., LTD.Inventors: Long Yang, Mingming Xie, Yisheng Jin, Xinzong Zhou, Junhui Zhao, Xuxiang Zhu, Yuping Shen
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Patent number: 10944973Abstract: 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: GrantFiled: May 21, 2018Date of Patent: March 9, 2021Assignee: Dialogic CorporationInventors: Kyeong Ho Yang, Beril Erkin, Yisheng Zhao
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Patent number: 10785448Abstract: 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: GrantFiled: September 12, 2019Date of Patent: September 22, 2020Assignee: Dialogic CorporationInventors: Kyeong Ho Yang, Yisheng Zhao
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Publication number: 20200169694Abstract: 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: ApplicationFiled: September 12, 2019Publication date: May 28, 2020Inventors: Kyeong Ho Yang, Yisheng Zhao
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Patent number: 10582222Abstract: 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: GrantFiled: August 23, 2018Date of Patent: March 3, 2020Assignee: DIALOGIC CORPORATIONInventors: Kyeong Ho Yang, Yisheng Zhao
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Patent number: 10455194Abstract: 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: GrantFiled: November 27, 2018Date of Patent: October 22, 2019Assignee: DIALOGIC CORPORATIONInventors: Kyeong Ho Yang, Yisheng Zhao
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Publication number: 20180367816Abstract: 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: ApplicationFiled: August 23, 2018Publication date: December 20, 2018Inventors: Kyeong Ho Yang, Yisheng Zhao
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Patent number: 10110930Abstract: 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: GrantFiled: July 2, 2015Date of Patent: October 23, 2018Assignee: Dialogic CorporationInventors: Kyeong Ho Yang, Yisheng Zhao
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Publication number: 20180270487Abstract: 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: ApplicationFiled: May 21, 2018Publication date: September 20, 2018Inventors: Kyeong Ho Yang, Beril Erkin, Yisheng Zhao
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Patent number: 10021402Abstract: 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: GrantFiled: December 16, 2015Date of Patent: July 10, 2018Assignee: Dialogic CorporationInventors: Kyeong Ho Yang, Beril Erkin, Yisheng Zhao
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Publication number: 20170180736Abstract: 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: ApplicationFiled: December 16, 2015Publication date: June 22, 2017Inventors: Kyeong Ho Yang, Beril Erkin, Yisheng Zhao
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Publication number: 20170006312Abstract: 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: ApplicationFiled: July 2, 2015Publication date: January 5, 2017Inventors: Kyeong Ho Yang, Yisheng Zhao