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    Entropy coding state segmentation and retention
    11.
    发明授权
    Entropy coding state segmentation and retention 有权

    公开(公告)号：US10218979B2

    公开(公告)日：2019-02-26

    申请号：US15340342

    申请日：2016-11-01

    Applicant: Cisco Technology, Inc.

    Inventor： Paul G. Bright-Thomas ,  Thomas Davies

    IPC: H04N19/13 ,  H04N19/172 ,  H04N19/126 ,  H04N19/56 ,  H04N19/137

    Abstract: Video coding and decoding techniques are provided in which entropy coding states are stored for regions of video frames of a sequence of video frames, upon completion of coding of those regions. Entropy coding initialization states for regions of a current video frame are derived based on entropy coding states of corresponding regions of a prior video frame in the sequence of video frames. This process may be performed at a video encoder and a video decoder, though some signaling may be sent from the encoder to the decoder to direct the decoder is certain operations.

    Keyframe mitigation for video streams with multiple receivers
    12.
    发明授权
    Keyframe mitigation for video streams with multiple receivers 有权

    公开(公告)号：US10182248B2

    公开(公告)日：2019-01-15

    申请号：US15357066

    申请日：2016-11-21

    Applicant: Cisco Technology, Inc.

    Inventor： Paul G. Bright-Thomas

    IPC: H04N7/173 ,  H04N21/2365 ,  H04N19/51 ,  H04N21/234 ,  H04N21/24 ,  H04N21/6379 ,  H04N19/46 ,  H04N19/65 ,  H04N19/895

    Abstract: In one embodiment, a video encoder generates an encoded bitstream representing a sequence of video frames including a keyframe. The encoder generates information for use by a decoder that receives the encoded bitstream to enable the decoder to generate display frames from a pre-keyframe video frame that is prior to the keyframe in the sequence of video frames. The encoded bitstream is sent to the decoder. In another embodiment, a video decoder receives from an encoder an encoded bitstream representing a sequence of video frames including a keyframe. The keyframe includes information to enable the decoder to generate display frames from a pre-keyframe video frame that was received prior to the keyframe in the sequence of video frames. The decoder generates display frames using the pre-keyframe video frame, information included with the keyframe and information included with an encoder-determined number of decoded frames subsequent to the keyframe.

    SPLIT FRAME MULTISTREAM ENCODE
    13.
    发明申请
    SPLIT FRAME MULTISTREAM ENCODE 有权
    分割框多重编码

    公开(公告)号：US20160219250A1

    公开(公告)日：2016-07-28

    申请号：US15089649

    申请日：2016-04-04

    Applicant: Cisco Technology, Inc.

    Inventor： Paul G. Bright-Thomas

    IPC: H04N7/15 ,  H04N19/40

    CPC classification number: H04N7/152 ,  H04N19/00 ,  H04N19/40 ,  H04N19/59 ,  H04N19/88

    Abstract: Techniques for video conferencing include receiving a stream of video slices from a participant, designating the video slices as a primary sub-picture of a frame of video, encoding, with a first encoder, a first secondary sub-picture of the frame of video to obtain an encoded first secondary sub-picture of a frame of video, encoding, with a second encoder, a second secondary sub-picture of the frame of video to obtain an encoded first secondary sub-picture of a frame of video, combining the primary sub-picture with the encoded first secondary sub-picture to obtain a first video stream, combining the primary sub-picture with the encoded second secondary sub-picture to obtain a second video stream, and transmitting the first and second video streams to respective recipients.

    Abstract translation: 用于视频会议的技术包括从参与者接收视频片段流，将视频片段指定为视频帧的主要子画面，使用第一编码器编码，将视频帧的第一辅助子画面编码为 获取视频帧的编码的第一辅助子图像，用第二编码器对视频帧的第二辅助子图像进行编码，以获得视频帧的编码的第一辅助子图像，组合主视频 具有编码的第一副副图像以获得第一视频流，将主子画面与编码的第二辅助子画面组合以获得第二视频流，以及将第一和第二视频流发送到各个接收者 。

    Keyframe mitigation for video streams with multiple receivers
    14.
    发明授权
    Keyframe mitigation for video streams with multiple receivers 有权

    公开(公告)号：US10575035B2

    公开(公告)日：2020-02-25

    申请号：US16208689

    申请日：2018-12-04

    Applicant: Cisco Technology, Inc.

    Inventor： Paul G. Bright-Thomas

    IPC: H04N7/173 ,  H04N21/2365 ,  H04N19/46 ,  H04N19/65 ,  H04N19/895 ,  H04N19/51 ,  H04N21/234 ,  H04N21/24 ,  H04N21/6379

    Abstract: In one embodiment, a video encoder generates an encoded bitstream representing a sequence of video frames including a keyframe. The encoder generates information for use by a decoder that receives the encoded bitstream to enable the decoder to generate display frames from a pre-keyframe video frame that is prior to the keyframe in the sequence of video frames. The encoded bitstream is sent to the decoder. In another embodiment, a video decoder receives from an encoder an encoded bitstream representing a sequence of video frames including a keyframe. The keyframe includes information to enable the decoder to generate display frames from a pre-keyframe video frame that was received prior to the keyframe in the sequence of video frames. The decoder generates display frames using the pre-keyframe video frame, information included with the keyframe and information included with an encoder-determined number of decoded frames subsequent to the keyframe.

    Split Frame Multistream Encode
    17.
    发明申请
    Split Frame Multistream Encode 审中-公开
    分割帧多码流编码

    公开(公告)号：US20150312521A1

    公开(公告)日：2015-10-29

    申请号：US14793936

    申请日：2015-07-08

    Applicant: Cisco Technology, Inc.

    Inventor： Paul G. Bright-Thomas

    IPC: H04N7/15 ,  H04N19/40 ,  H04N19/59

    CPC classification number: H04N7/152 ,  H04N19/00 ,  H04N19/40 ,  H04N19/59 ,  H04N19/88

    Abstract: Techniques for video conferencing including receiving bandwidth and/or codec characteristics of a plurality of video conference participants, determining whether or not any of the bandwidth and/or codec characteristics are sufficiently different from others of the bandwidth and/or codec characteristics to warrant different treatment, when one or more of the bandwidth and/or codec characteristics are sufficiently different, grouping video conference participants into at least a first group and a second group according to video conference participants having same or similar bandwidth and/or codec characteristics, and establishing a video conference with at least first and second subconferences to service the first and second groups, respectively, wherein each of the video conference participants receives frames of video in which a first portion of the frames is encoded by a shared encoder, and wherein a second portion of the frames is encoded by different encoders respectively designated for each of the video conference participants.

    Abstract translation: 用于视频会议的技术，包括接收多个视频会议参与者的带宽和/或编解码器特征，确定带宽和/或编解码器特性中的任何一个是否与带宽和/或编解码器特征中的其他特征足够不同以保证不同的处理 当一个或多个带宽和/或编解码器特征足够不同时，根据具有相同或相似带宽和/或编解码器特征的视频会议参与者将视频会议参与者分组为至少第一组和第二组，并且建立 视频会议，具有至少第一和第二子会议以分别为第一和第二组服务，其中每个视频会议参与者接收视频帧，其中第一部分帧由共享编码器编码，并且其中第二部分 的帧由分别指定的不同编码器编码 为每个视频会议参与者。

    Split Frame Multistream Encode
    18.
    发明申请
    Split Frame Multistream Encode 有权
    分割帧多码流编码

    公开(公告)号：US20140267572A1

    公开(公告)日：2014-09-18

    申请号：US13832629

    申请日：2013-03-15

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Paul G. Bright-Thomas

    IPC: H04N19/40 ,  H04N7/15

    CPC classification number: H04N7/152 ,  H04N19/124 ,  H04N19/15 ,  H04N19/30

    Abstract: Presented herein are techniques for creating video for participants in a video conference. A designated primary video stream is decoded and the resulting video composed in accordance with a primary sub-picture portion of a frame. Other video streams are designated as secondary video streams output by secondary entities, and are decoded and composed in accordance with a secondary sub-picture portion of the frame structured for the secondary entities. The composed primary video stream is encoded for display at each secondary entity, to obtain encoded slices of a primary video stream. The composed secondary video stream is encoded for display at one of the secondary entities, to obtain encoded slices of a secondary video stream. The encoded primary and secondary video streams are combined at the encoded slice level into a single video stream for transmission to, and decode and display at, the one of the secondary entities.

    Abstract translation: 这里提出的是为视频会议中的参与者创建视频的技术。 对指定的主视频流进行解码，并根据帧的主子图像部分构成所得到的视频。 其他视频流被指定为由次级实体输出的次要视频流，并且根据为次要实体构造的帧的辅助子图像部分进行解码和组合。 编码的主要视频流被编码以在每个次级实体处显示，以获得主要视频流的编码片段。 组合的次要视频流被编码以在次要实体之一处显示，以获得次视频流的编码片段。 经编码的主视频流和次视频流在编码的片级组合成单个视频流，以便传输到该一个次实体并在其中解码和显示。

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