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公开(公告)号：US10951905B2
公开(公告)日：2021-03-16
申请号：US16436570
申请日：2019-06-10
Inventor： Xunan Mao , Haixu Han , Xinwei Gao , Chenchen Gu , Jian He , Jingchang Chen
IPC: H04N19/40 , H04N19/124 , H04N19/196 , H04N19/136 , H04N19/172
Abstract: A video transcoding method is described. A computer device obtains at least one initial quantization parameter used to encode at least one initial coding unit for generating an initial compressed video, and determines, according to the at least one initial quantization parameter, a current reference quantization parameter corresponding to a current coding unit in a current video frame that is generated by decoding the initial compressed video. The computer device determines an estimated quantization parameter for encoding the current coding unit, determines a first difference between the current reference quantization parameter and the estimated quantization parameter, and sets a target quantization parameter to be equal to or greater than the estimated quantization parameter according to the first difference. The computer device encodes the current coding unit according to the target quantization parameter.
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2.发明授权公开(公告)号：US10735029B2
公开(公告)日：2020-08-04
申请号：US15955315
申请日：2018-04-17
Inventor： Yongfang Shi , Anlin Gao , Jing Lv , Jingchang Chen , Jian He , Chenchen Gu , Xunan Mao , Haibo Deng , Licai Guo , Chao Dai , Xun Zhang
IPC: H03M13/00 , H04L1/00 , H04N19/00 , H03M13/35 , H04N7/14 , H04N21/637 , H04N19/46 , H04N21/238 , H04N19/67 , H04L29/06 , H04N7/24 , H04N21/6375 , H04N19/172 , H04N19/115 , H04N19/166 , H04N19/169 , H03M13/15
Abstract: The application discloses video data redundancy control methods and apparatuses. Video packet redundancy control information is determined according to packet loss at a reception apparatus. The video packet redundancy control information is received from the reception apparatus. Video data is encoded according to the video packet redundancy control information to obtain encoded video data of a plurality of frames by a transmission apparatus. A frame-level redundancy budget is allocated for one of the plurality of frames according to the video packet redundancy control information. Further, the one of the plurality of frames is packetized according to the frame-level redundancy budget to generate a packetized frame. Redundancy coding is performed on the packetized frame to generate video packets including data packets and redundant packets for transmission to the reception apparatus.
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公开(公告)号：US08594442B2
公开(公告)日：2013-11-26
申请号：US13644230
申请日：2012-10-03
Inventor： Jian He
CPC classification number: G06T9/008 , H04N19/124 , H04N19/162 , H04N19/17 , H04N19/194
Abstract: Examples of the present invention provide a method and device for image compression coding. The method includes: obtaining a designated area selected from an image at a decoding side; determining quantization coefficients of the image to make an image compression ratio of the designated area lower than image compression ratios of areas in the image other than the designated area; and performing a compression coding on the image using the determined quantization coefficients of the image. By using the present invention, a video communication system may support a user to select an interested area in a video image, and clearly transmit the interested area selected by the user.
Abstract translation: 本发明的实施例提供了图像压缩编码的方法和装置。 该方法包括：获取从解码侧的图像中选择的指定区域; 确定所述图像的量化系数以使所述指定区域的图像压缩率低于除所述指定区域之外的图像中的区域的图像压缩比; 以及使用确定的图像的量化系数对图像执行压缩编码。 通过使用本发明，视频通信系统可以支持用户选择视频图像中的感兴趣区域，并且清楚地发送由用户选择的兴趣区域。
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公开(公告)号：US20180234116A1
公开(公告)日：2018-08-16
申请号：US15955315
申请日：2018-04-17
Inventor： Yongfang SHI , Anlin Gao , Jing Lv , Jingchang Chen , Jian He , Chenchen Gu , Xunan Mao , Haibo Deng , Licai Guo , Chao Dai , Xun Zhang
Abstract: The application discloses video data redundancy control methods and apparatuses. Video packet redundancy control information is determined according to packet loss at a reception apparatus. The video packet redundancy control information is received from the reception apparatus. Video data is encoded according to the video packet redundancy control information to obtain encoded video data of a plurality of frames by a transmission apparatus. A frame-level redundancy budget is allocated for one of the plurality of frames according to the video packet redundancy control information. Further, the one of the plurality of frames is packetized according to the frame-level redundancy budget to generate a packetized frame. Redundancy coding is performed on the packetized frame to generate video packets including data packets and redundant packets for transmission to the reception apparatus.
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