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    • 7. 发明申请
    • System And Method For Thinning Of Scalable Video Coding Bit-Streams
    • 可缩放视频编码比特流的系统和方法
    • US20070263087A1
    • 2007-11-15
    • US11676215
    • 2007-02-16
    • Danny HongThomas WiegandAlexandros EleftheriadisOfer Shapiro
    • Danny HongThomas WiegandAlexandros EleftheriadisOfer Shapiro
    • H04N11/04H04N7/12H04N7/14
    • H04N7/152H04N19/132H04N19/159H04N19/176H04N19/30H04N19/31H04N19/33H04N19/34H04N19/36H04N19/37H04N19/40H04N19/521H04N19/61
    • A system for videoconferencing that offers, among other features, extremely low end-to-end delay as well as very high scalability. The system accommodates heterogeneous receivers and networks, as well as the best-effort nature of networks such as those based on the Internet Protocol. The system relies on scalable video coding to provide a coded representation of a source video signal at multiple temporal, quality, and spatial resolutions. These resolutions are represented by distinct bitstream components that are created at each end-user encoder. System architecture and processes called SVC Thinning allow the separation of data into data used for prediction in other pictures and data not used for prediction in other pictures. SVC Thinning processes, which can be performed at video conferencing endpoints or at MCUs, can selectively remove or replace with fewer bits the data not used for prediction in other pictures from transmitted bit streams. This separation and selective removal or replacement of data for transmission allows a trade-off between scalability support (i.e. number of decodable video resolutions), error resiliency and coding efficiency.
    • 一种用于视频会议的系统,除了其他功能外,还提供非常低的端到端延迟以及非常高的可扩展性。 该系统适应异构接收机和网络,以及诸如基于因特网协议的网络的尽力而为的性质。 该系统依赖于可分级视频编码,以多个时间,质量和空间分辨率提供源视频信号的编码表示。 这些分辨率由在每个最终用户编码器处创建的不同比特流组件表示。 称为SVC Thinning的系统架构和过程允许将数据分离成用于其他图像中的预测数据和不用于其他图像中的预测的数据。 可以在视频会议端点或MCU处执行的SVC减薄处理可以以较少的位选择性地去除或替换未被发送的比特流在其他图像中预测的数据。 这种分离和选择性去除或替换用于传输的数据允许在可扩展性支持(即,可解码视频分辨率的数量),错误弹性和编码效率之间进行权衡。