公开(公告)号：US20240048776A1

公开(公告)日：2024-02-08

申请号：US17956444

申请日：2022-09-29

Applicant: Apple Inc.

Inventor： Yixin Du ,  Alexandros Tourapis ,  Alican Nalci ,  Guoxin Jin ,  Hilmi Enes Egilmez ,  Hsi-Jung Wu ,  Jun Xin ,  Yeqing Wu ,  Yunfei Zheng

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/139 ,  H04N19/176

Abstract: Disclosed is a method that includes receiving an image frame having a plurality of coded blocks, determining a prediction unit (PU) from the plurality of coded blocks, determining one or more motion compensation units arranged in an array within the PU, and applying a filter to one or more boundaries of the one or more motion compensation units. Also disclosed is a method that includes receiving a reference frame that includes a reference block, determining a timing for deblocking a current block, performing motion compensation on the reference frame to obtain a predicted frame that includes a predicted block, performing reconstruction on the predicted frame to obtain a reconstructed frame that includes a reconstructed PU, and applying, at the timing for deblocking the current block, a deblocking filter based on one or more parameters to the reference block, the predicted block, or the reconstructed PU.

公开(公告)号：US20250071345A1

公开(公告)日：2025-02-27

申请号：US18945408

申请日：2024-11-12

Applicant: Apple Inc.

Inventor： Yixin Du ,  Alexandros Tourapis ,  Alican Nalci ,  Guoxin Jin ,  Hilmi Enes Egilmez ,  Hsi-Jung Wu ,  Jun Xin ,  Yeqing Wu ,  Yunfei Zheng

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/139 ,  H04N19/176 ,  H04N19/82

Abstract: Disclosed is a method that includes receiving an image frame having a plurality of coded blocks, determining a prediction unit (PU) from the plurality of coded blocks, determining one or more motion compensation units arranged in an array within the PU, and applying a filter to one or more boundaries of the one or more motion compensation units. Also disclosed is a method that includes receiving a reference frame that includes a reference block, determining a timing for deblocking a current block, performing motion compensation on the reference frame to obtain a predicted frame that includes a predicted block, performing reconstruction on the predicted frame to obtain a reconstructed frame that includes a reconstructed PU, and applying, at the timing for deblocking the current block, a deblocking filter based on one or more parameters to the reference block, the predicted block, or the reconstructed PU.

公开(公告)号：US20240388720A1

公开(公告)日：2024-11-21

申请号：US18784149

申请日：2024-07-25

Applicant: Apple Inc.

Inventor： Yunfei Zheng ,  Alexandros Tourapis ,  Alican Nalci ,  Felix C. Fernandes ,  Hilmi Enes Egilmez ,  Hsi-Jung Wu ,  Jaehong Chon ,  Jun Xin ,  Yeqing Wu ,  Yixin Du

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/172 ,  H04N19/43 ,  H04N19/58

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for reducing a quantity of buffers for a video codec. One of the methods includes determining, from a plurality of prediction modes, a prediction mode for data that represents frame data in a frame; in response to determining the prediction mode, selecting, using the prediction mode, one or more buffers from a plurality of buffers, each buffer of which is for a prediction mode from the plurality of prediction modes, a first quantity of buffers in the plurality of buffers being less than a second quantity of prediction modes in the plurality of prediction modes; retrieving, from each of the one or more buffers, historical data for the frame data; and in response to retrieving the historical data, generating, using the historical data, updated data for the frame data in the frame of the video sequence.

公开(公告)号：US20250080726A1

公开(公告)日：2025-03-06

申请号：US18819841

申请日：2024-08-29

Applicant: Apple Inc.

Inventor： Hilmi Enes Egilmez ,  Alexandros Tourapis ,  Alican Nalci ,  Guoxin Jin ,  Hsi-Jung Wu ,  Jun Xin ,  Yeqing Wu ,  Yixin Du ,  Yunfei Zheng

IPC: H04N19/107 ,  H04N19/124 ,  H04N19/13 ,  H04N19/17 ,  H04N19/70

Abstract: Systems and methods are configured for accessing data representing video content, the data comprising a set of one or more symbols each associated with a syntax element; performing a probability estimation, for encoding the data, comprising: for each symbol, obtaining, based on the syntax element for that symbol, an adaptivity rate parameter value, the adaptivity rate parameter value being a function of a number of symbols in the set of one or more symbols; updating the adaptivity rate parameter value as a function of an adjustment parameter value; and generating, based on the updated adaptivity rate parameter value, a probability value; generating a probability estimation; and encoding, based on the CDF of the probability estimation, the data comprising the set of one or more symbols for transmission.

公开(公告)号：US20240323442A1

公开(公告)日：2024-09-26

申请号：US18603138

申请日：2024-03-12

Applicant: Apple Inc.

Inventor： Alican Nalci ,  Guoxin Jin ,  Hilmi Enes Egilmez ,  Hsi-Jung Wu ,  Jun Xin ,  Yixin Du ,  Yunfei Zheng ,  Yeqing Wu

IPC: H04N19/625 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/625 ,  H04N19/176 ,  H04N19/70

Abstract: In an example method, a decoder accesses a bitstream representing video content, and parses one or more flexible coefficient position (FCP) syntax from the bitstream, where the one or more FCP syntax indicate one or more index values. The decoder further determines side information representing one or more characteristics of an encoded portion of the video content. The decoder interprets the one or more FCP syntax based on the side information, including determining a coefficient position with respect to the encoded portion of the video content based on the one or more index values and the side information. The decoder decodes the encoded portion of the video content according to the coefficient position.

公开(公告)号：US20230188738A1

公开(公告)日：2023-06-15

申请号：US18076166

申请日：2022-12-06

Applicant: Apple Inc.

Inventor： Alican Nalci ,  Alexandros Tourapis ,  Hilmi Enes Egilmez ,  Hsi-Jung Wu ,  Jun Xin ,  Yeqing Wu ,  Yixin Du ,  Yunfei Zheng

IPC: H04N19/44 ,  H04N19/184

CPC classification number: H04N19/44 ,  H04N19/184

Abstract: In an example method, a decoder obtains a data stream representing video content. The video content is partitioned into one or more logical units, and each of the logical units is partitioned into one or more respective logical sub-units. The decoder determines that the data stream includes first data indicating that a first logical unit has been encoded according to a flexible skip coding scheme. In response, the decoder determines a first set of decoding parameters based on the first data, and decodes each of the logical sub-units of the first logical unit according to the first set of decoding parameters.

公开(公告)号：US20220360814A1

公开(公告)日：2022-11-10

申请号：US17736881

申请日：2022-05-04

Applicant: Apple Inc.

Inventor： Yeqing Wu ,  Alexandros Tourapis ,  Yunfei Zheng ,  Hsi-Jung Wu ,  Jun Xin ,  Albert E. Keinath ,  Mei Guo ,  Alican Nalci

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/105 ,  H04N19/159 ,  H04N19/124

Abstract: An encoder or decoder can perform enhanced motion vector prediction by receiving an input block of data for encoding or decoding and accessing stored motion information for at least one other block of data. Based on the stored motion information, the encoder or decoder can generate a list of one or more motion vector predictor candidates for the input block in accordance with an adaptive list construction order. The encoder or decoder can predict a motion vector for the input block based on at least one of the one or more motion vector predictor candidates.