知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

1701 records (took 0.03 seconds)

    QUANTIZER FOR LOSSLESS & NEAR-LOSSLESS COMPRESSION
    61.
    发明公开
    QUANTIZER FOR LOSSLESS & NEAR-LOSSLESS COMPRESSION 审中-公开

    公开(公告)号：US20230336727A1

    公开(公告)日：2023-10-19

    申请号：US18342349

    申请日：2023-06-27

    Applicant: TENCENT AMERICA LLC

    Inventor： Madhu Peringassery KRISHNAN ,  Xin Zhao ,  Shan Liu

    IPC: H04N19/124 ,  H04N19/85 ,  H04N19/12

    CPC classification number: H04N19/124 ,  H04N19/85 ,  H04N19/12

    Abstract: A system includes code configured to cause a processor to obtain a video bitstream, the video bitstream including: a first quantization index value for a coefficient of a coded image; an offset value; a quantization step size that corresponds to the first quantization index value; a second quantization index value for another coefficient of the coded image, the second quantization index value being based on both the first quantization index value and the offset value and being greater than or equal to a predetermined threshold value; and a mode indicating whether the coded image is to be decoded in a lossy mode or a lossless mode, the mode being determined based on whether the first quantization index value is equal to a quantization index value associated with lossless coding, and whether the offset value is less than or equal to the quantization index value associated with the lossless coding.

    Mode selection based on adaptive transform basis
    66.
    发明授权
    Mode selection based on adaptive transform basis 有权

    公开(公告)号：US11729386B2

    公开(公告)日：2023-08-15

    申请号：US16911810

    申请日：2020-06-25

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Masato Ohkawa ,  Hideo Saitou ,  Tadamasa Toma ,  Takahiro Nishi ,  Kiyofumi Abe ,  Ryuichi Kanoh

    IPC: H04N19/12 ,  H04N19/124 ,  H04N19/176 ,  H04N19/625

    CPC classification number: H04N19/12 ,  H04N19/124 ,  H04N19/176 ,  H04N19/625

    Abstract: When a transform-basis adaptive selection mode is enabled, an encoder that transforms residuals of a current block to encode an image: adaptively selects a first horizontal transform basis from among one or more transform basis candidates when a horizontal size of the current block is greater than a first horizontal threshold size; otherwise selects a fixed horizontal transform basis as a first horizontal transform basis; adaptively selects a first vertical transform basis from among the one or more transform basis candidates when a vertical size of the current block is greater than a first vertical threshold size; otherwise selects a fixed vertical transform basis as a first vertical transform basis; and generates first transform coefficients by performing a first horizontal transform and a first vertical transform on the residuals of the current block, using the first horizontal transform basis selected and the first vertical transform basis selected, respectively.

    Method of controlling encoding of display data
    70.
    发明授权
    Method of controlling encoding of display data 有权

    公开(公告)号：US11699212B2

    公开(公告)日：2023-07-11

    申请号：US17469803

    申请日：2021-09-08

    Applicant: DisplayLink (UK) Limited

    Inventor： Dominik Czerwik

    IPC: G06V10/00 ,  G06T3/40 ,  H04N19/12 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  G06T9/00

    CPC classification number: G06T3/4084 ,  G06T9/00 ,  H04N19/12 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

    Abstract: Systems and methods of encoding display data include performing a part of a first predetermined transform algorithm on at least a first part of a first frame of display data, and analyzing a light level to determine whether a different transform algorithm would be more suitable for encoding a second part of the first frame of the display data. If it is determined that a different transform algorithm would be more suitable for encoding, the second part of the first frame of the display data is encoded using the different transform algorithm to generate an encoded first frame. If it is determined that a different transform algorithm would not be more suitable for encoding, the second part of the first frame of the display data is encoded using the first predetermined transform algorithm to generate the encoded first frame.

Patent Agency Ranking