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    Palette Mode Coding With Designated Bit Depth Precision
    101.
    发明公开
    Palette Mode Coding With Designated Bit Depth Precision 审中-公开

    公开(公告)号：US20240305802A1

    公开(公告)日：2024-09-12

    申请号：US18276407

    申请日：2021-02-09

    Applicant: Google LLC

    Inventor： Cheng Chen ,  Jingning Han ,  Hui Su ,  Yaowu Xu

    IPC: H04N19/44 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186

    CPC classification number: H04N19/44 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186

    Abstract: Syntax elements are written to a bitstream to designate bit depth precision for palette mode coding of video blocks. During encoding, a bit depth to use for palette mode coding a current block may be based on an input video signal including the current block or based on some change in bit depth precision. A prediction residual for the current block is encoded to a bitstream along with syntax elements indicative of the bit depth used for the palette mode coding of the current block. In particular, the syntax elements include a first element indicating the palette mode coding bit depth used and a second element indicating whether to apply a bit offset to the palette mode coding bit depth. During decoding, values of the syntax elements are read from the bitstream and used to determine a bit depth for palette mode coding the encoded block.

    Motion prediction coding with coframe motion vectors
    103.
    发明授权
    Motion prediction coding with coframe motion vectors 有权

    公开(公告)号：US11665365B2

    公开(公告)日：2023-05-30

    申请号：US16131133

    申请日：2018-09-14

    Applicant: GOOGLE LLC

    Inventor： Bohan Li ,  Yaowu Xu ,  Jingning Han

    IPC: H04N19/52 ,  H04N19/176 ,  H04N19/577

    CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/577

    Abstract: Video coding may include generating, by a processor executing instructions stored on a non-transitory computer-readable medium, an encoded frame by encoding a current frame from an input bitstream, by generating a reference coframe spatiotemporally corresponding to the current frame, wherein the current frame is a frame from a sequence of input frames, wherein each frame from the sequence of input frames has a respective sequential location in the sequence of input frames, and wherein the current frame has a current sequential location in the sequence of input frames, and encoding the current frame using the reference coframe. Video coding may include including the encoded frame in an output bitstream and outputting the output bitstream.

    Adaptive coding of prediction modes using probability distributions
    104.
    发明授权
    Adaptive coding of prediction modes using probability distributions 有权

    公开(公告)号：US11627321B2

    公开(公告)日：2023-04-11

    申请号：US17340293

    申请日：2021-06-07

    Applicant: GOOGLE LLC

    Inventor： Yaowu Xu ,  Paul Gordon Wilkins ,  James Bankoski

    IPC: H04N19/122 ,  H04N19/13 ,  H04N19/61 ,  H04N19/50 ,  H04N19/11 ,  H04N19/91

    Abstract: Generating, by a processor in response to instructions stored on a non-transitory computer readable medium, a reconstructed frame, may include generating a reconstructed block of the reconstructed frame by decoding from an encoded bitstream. Decoding may include decoding a value from the encoded bitstream, identifying, in accordance with the value, a probability distribution for generating the reconstructed block, wherein the value indicates the probability distribution among a plurality of probability distributions determined independently of generating the reconstructed frame, entropy decoding an encoded prediction mode from the encoded bitstream using the probability distribution to identify a prediction mode for generating the reconstructed block, generating a prediction block in accordance with the prediction mode; combining the prediction block and a reconstructed residual block to obtain the reconstructed block, and including the reconstructed block in the reconstructed frame.

    Transform kernel selection and entropy coding
    106.
    发明授权
    Transform kernel selection and entropy coding 有权

    公开(公告)号：US11405645B2

    公开(公告)日：2022-08-02

    申请号：US15630071

    申请日：2017-06-22

    Applicant: GOOGLE LLC

    Inventor： Jingning Han ,  Yaowu Xu ,  Ching-Han Chiang

    IPC: H04N11/02 ,  H04N19/60 ,  G06N7/00 ,  G06N20/10 ,  H04N19/12 ,  H04N19/176 ,  H04N19/137 ,  H04N19/463 ,  H04N11/04 ,  H04N19/127 ,  H04N19/157

    Abstract: Transform kernel candidates including a vertical transform type associated with a vertical motion and a horizontal transform type associated with a horizontal motion can be encoded or decoded. During an encoding operation, a residual block of a current block is transformed according to a selected transform kernel candidate to produce a transform block. A probability model for encoding the selected transform kernel candidate is then identified based on neighbor transform blocks of the transform block. The selected transform kernel candidate is then encoded according to the probability model. During a decoding operation, the encoded transform kernel candidate is decoded using the probability model. The encoded transform block is then decoded by inverse transforming dequantized transform coefficients thereof according to the decoded transform kernel candidate.

    Adaptive temporal filtering for alternate frame reference rendering
    107.
    发明授权
    Adaptive temporal filtering for alternate frame reference rendering 有权

    公开(公告)号：US10951885B2

    公开(公告)日：2021-03-16

    申请号：US16117563

    申请日：2018-08-30

    Applicant: GOOGLE LLC

    Inventor： Jingning Han ,  Paul Wilkins ,  Yaowu Xu

    IPC: H04N19/105 ,  H04N19/182 ,  H04N19/167 ,  H04N19/177 ,  H04N19/117 ,  H04N19/137

    Abstract: A method for using an alternate frame reference (ARF) includes selecting an anchor frame and video frames, where the anchor frame includes an anchor block, and the anchor block includes an anchor pixel; identifying, for the anchor block of the anchor frame, respective reference blocks in the video frames; determining, for the anchor pixel and using an anchor patch, respective distances between the anchor pixel and respective co-located reference pixels of the respective reference blocks, where the anchor patch includes anchor patch pixels, and a respective distance, of the respective distances, between the anchor pixel and a respective co-located reference pixel is determined using the anchor patch pixels and co-located reference pixels; determining, using the respective distances, respective weights; determining, using the respective weights, an ARF pixel that is co-located with the anchor pixel; and encoding, in a compressed bitstream, the ARF.

    Entropy coding transform partitioning information
    108.
    发明授权
    Entropy coding transform partitioning information 有权

    公开(公告)号：US10694180B2

    公开(公告)日：2020-06-23

    申请号：US15939691

    申请日：2018-03-29

    Applicant: GOOGLE LLC

    Inventor： Jingning Han ,  Yaowu Xu

    IPC: H04N19/176 ,  H04N19/115 ,  H04N19/60 ,  H04N19/91 ,  H04N19/157 ,  H04N19/13

    Abstract: Entropy coding of transform partitioning information may include decoding a current block by determining a probability for entropy decoding a transform partitioning flag based on a transform block size of an adjacent block that is available for decoding, entropy decoding the transform partitioning flag for the current block using the probability, generating a reconstructed block based on the current block by, on a condition that the transform partitioning flag indicates that transform partitioning is omitted for the current block, inverse transforming the current block using a current block size inverse transform, and, on a condition that the transform partitioning flag indicates transform partitioning for the current block, identifying sub-blocks from the current block, wherein each sub-block from the sub-blocks has a sub-block size smaller than the current block size, inverse transforming the sub-blocks using sub-block size inverse transforms, and generating the reconstructed block based on the residual block.

    ADAPTIVE TEMPORAL FILTERING FOR ALTERNATE FRAME REFERENCE RENDERING
    110.
    发明申请
    ADAPTIVE TEMPORAL FILTERING FOR ALTERNATE FRAME REFERENCE RENDERING 审中-公开

    公开(公告)号：US20200077083A1

    公开(公告)日：2020-03-05

    申请号：US16117563

    申请日：2018-08-30

    Applicant: GOOGLE LLC

    Inventor： Jingning Han ,  Paul Wilkins ,  Yaowu Xu

    IPC: H04N19/105 ,  H04N19/182 ,  H04N19/167 ,  H04N19/177 ,  H04N19/117 ,  H04N19/137

    Abstract: A method for using an alternate frame reference (ARF) includes selecting an anchor frame and video frames, where the anchor frame includes an anchor block, and the anchor block includes an anchor pixel; identifying, for the anchor block of the anchor frame, respective reference blocks in the video frames; determining, for the anchor pixel and using an anchor patch, respective distances between the anchor pixel and respective co-located reference pixels of the respective reference blocks, where the anchor patch includes anchor patch pixels, and a respective distance, of the respective distances, between the anchor pixel and a respective co-located reference pixel is determined using the anchor patch pixels and co-located reference pixels; determining, using the respective distances, respective weights; determining, using the respective weights, an ARF pixel that is co-located with the anchor pixel; and encoding, in a compressed bitstream, the ARF.

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