Temporal classified filtering for video compression
    1.
    发明授权
    Temporal classified filtering for video compression 失效
    视频压缩的时域分类过滤

    公开(公告)号:US08503530B2

    公开(公告)日:2013-08-06

    申请号:US10856093

    申请日:2004-05-27

    IPC分类号: G06K9/40

    摘要: Temporal classified filtering encodes image data by applying filters assigned to classes of pixels in a target frame to predict values for the pixels. The pixels are classified based on their associated motion vectors and the motion vectors are used to position the filters on the reference frame. Prediction error values are also calculated. The filters, motion vectors, and prediction errors represent the pixels in the encoded image data. The reference frame may be a past or future frame of the image data, and multiple reference frames of various combinations of past and future frames may be used. The filters for multiple reference frames are three-dimensional comprising a two-dimensional filter for each reference frame. The filters may be pre-determined or generated as the frames are encoded. The image data is recreated by applying the filters to the reference frames and correcting the resulting predictions with the prediction error values.

    摘要翻译: 时间分类过滤通过应用分配给目标帧中的像素类的滤波来对图像数据进行编码,以预测像素的值。 基于它们相关联的运动矢量对像素进行分类,运动矢量用于将滤波器定位在参考帧上。 还计算预测误差值。 滤波器,运动矢量和预测误差表示编码图像数据中的像素。 参考帧可以是图像数据的过去或将来的帧,并且可以使用过去和未来帧的各种组合的多个参考帧。 用于多个参考帧的滤波器是三维的,其包括用于每个参考帧的二维滤波器。 当帧被编码时,滤波器可以被预先确定或生成。 通过将滤波器应用于参考帧并用预测误差值校正所得到的预测来重新创建图像数据。

    Variable support robust transform for multiple description coding
    2.
    发明授权
    Variable support robust transform for multiple description coding 失效
    可变支持多描述编码的鲁棒变换

    公开(公告)号:US07817869B2

    公开(公告)日:2010-10-19

    申请号:US10840881

    申请日:2004-05-07

    IPC分类号: G06K9/36

    摘要: A multi-level transform generates descriptions containing compressed data that represents source data using a description generation operation and variable support filters for compaction at each level. The initial level filters the source data and each subsequent level operates on data filtered by a prior level. The description assignment and filtering at each level may vary to create different operating points for the multi-level transform. Each operating point may have a corresponding error recovery process. In one aspect, an error recovery process encodes additional descriptions that are combined with non-erroneous description data to provide error recovery of the data in missing or damaged descriptions. In another aspect, a multi-level transform is created by combining description generation and variable support filters at the various levels.

    摘要翻译: 多级转换生成包含使用描述生成操作代表源数据的压缩数据的描述,并在每个级别生成用于压缩的可变支持过滤器。 初始级别过滤源数据,并且每个后续级别对由先前级别过滤的数据进行操作。 每个级别的描述分配和过滤可能会有所不同,从而为多层次转换创建不同的工作点。 每个工作点可能具有相应的错误恢复过程。 在一个方面,错误恢复过程编码与非错误描述数据组合的附加描述,以在缺失或损坏的描述中提供数据的错误恢复。 在另一方面,通过在不同级别组合描述生成和可变支持过滤器来创建多级变换。