METHODS AND APPARATUS TO ENCODE AND DECODE VIDEO USING QUANTIZATION MATRICES

    公开(公告)号:US20220109840A1

    公开(公告)日:2022-04-07

    申请号:US17555092

    申请日:2021-12-17

    Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to encode and decode video using quantization matrices. An example apparatus includes interface circuitry to access an input frame of video, quantization matrix syntax encoder circuitry to encode a set of user-defined quantization matrices into a sequence header associated with a sequence of video frames including the input frame, adaptive quantization matrix selector circuitry to select a subset of quantization matrices from a combination of a set of default quantization matrices and the set of user-defined quantization matrices, adaptive segment selector circuitry to select a first one of the subset of quantization matrices for a first segment of the input frame, the input frame to be divided into a plurality of segments including the first segment, and encoder circuitry to quantize transform coefficients of the first segment of the input frame based on the first one of the subset of quantization matrices.

    Motion adaptive encoding of video
    66.
    发明授权

    公开(公告)号:US11044477B2

    公开(公告)日:2021-06-22

    申请号:US16715315

    申请日:2019-12-16

    Abstract: An example apparatus for encoding video frames includes a receiver to receive a current frame to be encoded, and a quantization parameter and statistics for the current frame. The apparatus also includes a frame motion analyzer to detect a motion activity status for the current frame based on the statistics via a motion activity analysis. The apparatus further includes a motion adaptive frame inserter to adaptively switch between a regular reference list management and a long-term reference frame insertion based on the detected motion activity status and the quantization parameter. The apparatus also further includes an encoder to encode the current frame using the regular reference list management or the long-term reference frame insertion.

    LOOP RESTORATION FILTERING FOR SUPER RESOLUTION VIDEO CODING

    公开(公告)号:US20200314452A1

    公开(公告)日:2020-10-01

    申请号:US16901910

    申请日:2020-06-15

    Abstract: Techniques related to selecting restoration filter coefficients for 2-dimensional loop restoration filters for super resolution video coding are discussed. Such techniques include upscaling reconstructed video frames along only a first dimension and selecting filter coefficients for portions of the frame by an evaluation that, for each pixel of the portion, uses only pixel values that are aligned with the first dimension. Selection of filter coefficients for the second dimension may be skipped or made using only a subset of available filter coefficients.

    ADAPTIVELY ENCODING VIDEO FRAMES BASED ON COMPLEXITY

    公开(公告)号:US20200084449A1

    公开(公告)日:2020-03-12

    申请号:US16684952

    申请日:2019-11-15

    Abstract: An example apparatus for encoding video frames includes a frame analyzer to execute a look ahead analysis on a received set of frames. The frame analyzer includes a look ahead video analyzer to down-sample the set of frames and encode the down-sampled frames with a constant quantization parameter (QP). A number of generated bits for each of the frames is used as a complexity measurement for each of the frames. The apparatus further includes an encoder to encode the input frame using an adjusted bit allocation based on a relative complexity of the input frame in relation to a complexity of the set of frames.

Patent Agency Ranking