公开(公告)号：US11979613B2

公开(公告)日：2024-05-07

申请号：US17851268

申请日：2022-06-28

Applicant: HFI Innovation Inc.

Inventor： Ching-Yeh Chen ,  Olena Chubach ,  Chen-Yen Lai ,  Tzu-Der Chuang ,  Chih-Wei Hsu ,  Yu-Wen Huang

IPC: H04N19/00 ,  H04N19/117 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70 ,  H04N19/82

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

Abstract: Encoding methods and apparatuses include receiving input video data of a current block in a current picture and applying a Cross-Component Adaptive Loop Filter (CCALF) processing on the current block based on cross-component filter coefficients to refine chroma components of the current block according to luma sample values. The method further includes signaling two Adaptive Loop Filter (ALF) signal flags and two CCALF signal flags in an Adaptation Parameter Set (APS) with an APS parameter type equal to ALF or parsing two ALF signal flags and two CCALF signal flags from an APS with an APS parameter type equal to ALF, signaling or parsing one or more Picture Header (PH) CCALF syntax elements or Slice Header (SH) CCALF syntax elements, wherein both ALF and CCALF signaling are present either in a PH or SH, and encoding or decoding the current block in the current picture.

公开(公告)号：US11778235B2

公开(公告)日：2023-10-03

申请号：US17717966

申请日：2022-04-11

Applicant: HFI INNOVATION INC.

Inventor： Shih-Ta Hsiang ,  Lulin Chen ,  Tzu-Der Chuang ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Olena Chubach ,  Yu-Wen Huang

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/12

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/124 ,  H04N19/176

Abstract: A method for performing transform skip mode (TSM) in a video decoder is provided. A video decoder receives data from a bitstream to be decoded as a plurality of video pictures. The video decoder parses the bitstream for a first syntax element in a sequence parameter set (SPS) of a current sequence of video pictures. When the first syntax element indicates that transform skip mode is allowed for the current sequence of video pictures and when transform skip mode is used for a current block in a current picture of the current sequence, the video decoder reconstructs the current block by using quantized residual signals that are not transformed.