公开(公告)号：US20230142771A1

公开(公告)日：2023-05-11

申请号：US17979025

申请日：2022-11-02

Applicant: Apple Inc.

Inventor： Yixin DU ,  Alexandros TOURAPIS ,  Yunfei ZHENG ,  Jun XIN ,  Mukta S. Gore ,  Alican NALCI ,  Mei T. GUO ,  Yeqing WU ,  Hsi-Jung WU

IPC: H04N19/82 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

CPC classification number: H04N19/82 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: A filtering system for video coders and decoders is disclosed that includes a feature detector having an input for samples reconstructed from coded video data representing a color component of source video, and having an output for data identifying a feature recognized therefrom, an offset calculator having an input for the feature identification data from the feature detector and having an output for a filter offset, and a filter having an input for the filter offset from the offset calculator and an input for the reconstructed samples, and having an output for filtered samples. The filtering system is expected to improve operations of video coder/decoder filtering systems by selecting filtering offsets from analysis of recovered video data in a common color plane as the samples that will be filtered.

公开(公告)号：US20200236349A1

公开(公告)日：2020-07-23

申请号：US16254528

申请日：2019-01-22

Applicant: Apple Inc.

Inventor： Jiefu ZHAI ,  Xingyu ZHANG ,  Xiaosong ZHOU ,  Jun XIN ,  Hsi-Jung WU ,  Yeping SU

IPC: H04N19/105 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61 ,  G06N3/08

Abstract: Systems and methods disclosed for video compression, utilizing neural networks for predictive video coding. Processes employed combine multiple banks of neural networks with codec system components to carry out the coding and decoding of video data.

公开(公告)号：US20200120345A1

公开(公告)日：2020-04-16

申请号：US16156193

申请日：2018-10-10

Applicant: Apple Inc.

Inventor： Mei GUO ,  Jun XIN ,  Jun XU ,  Yeping SU ,  Chris CHUNG ,  Xiaosong ZHOU ,  Hsi-Jung WU

IPC: H04N19/186 ,  H04N19/12 ,  H04N19/136 ,  H04N19/51

Abstract: Systems and methods are disclosed for reshaping HDR video content to improve compression efficiency while using standard encoding/decoding techniques. Input HDR video frames, e.g., represented in an IPT color space, may be reshaped before the encoding/decoding process and the corresponding reconstructed HDR video frames may then be reverse reshaped. The disclosed reshaping methods may be combinations of scene-based or segment-based methods.

公开(公告)号：US20130254620A1

公开(公告)日：2013-09-26

申请号：US13785859

申请日：2013-03-05

Applicant: Apple Inc.

Inventor： Xiaosong ZHOU ,  Hyeonkuk JEONG ,  Yan YANG ,  Dazhong ZHANG ,  Hsi-Jung WU

IPC: H03M13/05 ,  H03M13/29

CPC classification number: H03M13/05 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/27 ,  H03M13/29 ,  H03M13/2957 ,  H03M13/373 ,  H03M13/3746 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/008

Abstract: Coded video data may be transmitted between an encoder and a decoder using multiple FEC codes and/or packets for error detection and correction. Only a subset of the FEC packets need be transmitted between the encoder and decoder. The FEC packets of each FEC group may take, as inputs, data packets of a current FEC group and also an untransmitted FEC packet of a preceding FEC group. Due to relationships among the FEC packets, when transmission errors arise and data packets are lost, there remain opportunities for a decoder to recover lost data packets from earlier-received FEC groups when later-received FEC groups are decoded. This opportunity to recover data packets from earlier FEC groups may be useful in video coding and other systems, in which later-received data often cannot be decoded unless earlier-received data is decoded properly.

Abstract translation: 可以在编码器和解码器之间使用多个用于错误检测和校正的FEC码和/或包进行编码的视频数据。 只有FEC数据包的一部分需要在编码器和解码器之间传输。 每个FEC组的FEC分组可以采用当前FEC组的数据分组和前一个FEC组的未发送FEC分组的输入。 由于FEC分组之间的关系，当传输错误出现并且数据分组丢失时，当稍后接收的FEC组被解码时，解码器仍然有机会恢复来自早先接收的FEC组的丢失的数据分组。 从先前的FEC组恢复数据分组的机会在视频编码和其他系统中可能是有用的，其中后期接收的数据通常不能被解码，除非先前接收到的数据被正确解码。

公开(公告)号：US20240129472A1

公开(公告)日：2024-04-18

申请号：US18468900

申请日：2023-09-18

Applicant: Apple Inc.

Inventor： Yeqing WU ,  Yunfei ZHENG ,  Alican NALCI ,  Yixin DU ,  Hilmi Enes EGILMEZ ,  Guoxin JIN ,  Alexandros TOURAPIS ,  Jun XIN ,  Hsi-Jung WU

IPC: H04N19/13 ,  H04N19/129 ,  H04N19/176

CPC classification number: H04N19/13 ,  H04N19/129 ,  H04N19/176

Abstract: Improved lossless entropy coding techniques for coding of image data include selecting a context for entropy coding based on an ordered scan path of possible context locations. A symbol for a current location within a source image may be entropy coded based on a context of prior encoded symbols of other locations within source images, where the context is selected based on an ordered scan path enumerating a series of potential context locations within one or more source images. To select a context, a predetermined number of prior symbols may be selected by qualifying or disqualifying locations in the scan path, and then the current symbol may be encoded with a context based on prior symbols corresponding to the first qualifying context locations in the order of the scan path.

公开(公告)号：US20230143147A1

公开(公告)日：2023-05-11

申请号：US17979027

申请日：2022-11-02

Applicant: Apple Inc.

Inventor： Yixin DU ,  Alexandros TOURAPIS ,  Yunfei ZHENG ,  Jun XIN ,  Alican NALCI ,  Mei T. GUO ,  Yeqing WU ,  Hsi-Jung WU

IPC: H04N19/82 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/82 ,  H04N19/70 ,  H04N19/186

Abstract: A cross-component based filtering system is disclosed for video coders and decoders. The filtering system may include a filter having an input for a filter offset and an input for samples reconstructed from coded video data representing a native component of source video on which the filter operates. The offset may be generated at least in part from a sample classifier that classifies samples reconstructed from coded video data representing a color component of the source video orthogonal to the native component according to sample intensity.

公开(公告)号：US20230007272A1

公开(公告)日：2023-01-05

申请号：US17894309

申请日：2022-08-24

Applicant: Apple Inc.

Inventor： Alexandros Michael TOURAPIS ,  Yeping SU ,  David SINGER ,  Hsi-Jung WU

IPC: H04N19/159 ,  H04N19/567 ,  H04N19/147 ,  H04N19/109 ,  H04N19/176 ,  H04N19/513 ,  H04N19/70

Abstract: The present disclosure describes techniques for coding and decoding video in which a plurality of coding hypotheses are developed for an input pixel block of frame content. Each coding hypothesis may include generation of prediction data for the input pixel block according to a respective prediction search. The input pixel block may be coded with reference to a prediction block formed from prediction data derived according to plurality of hypotheses. Data of the coded pixel block may be transmitted to a decoder along with data identifying a number of the hypotheses used during the coding to a channel. At a decoder, an inverse process may be performed, which may include generation of a counterpart prediction block from prediction data derived according to the hypothesis identified with the coded pixel block data, then decoding of the coded pixel block according to the prediction data.

公开(公告)号：US20220191473A1

公开(公告)日：2022-06-16

申请号：US17568266

申请日：2022-01-04

Applicant: Apple Inc.

Inventor： Jiefu ZHAI ,  Xingyu ZHANG ,  Xiaosong ZHOU ,  Jun XIN ,  Hsi-Jung WU ,  Yeping SU

IPC: H04N19/105 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61 ,  G06N3/08

Abstract: Systems and methods disclosed for video compression, utilizing neural networks for predictive video coding. Processes employed combine multiple banks of neural networks with codec system components to carry out the coding and decoding of video data.

公开(公告)号：US20210397826A1

公开(公告)日：2021-12-23

申请号：US17339249

申请日：2021-06-04

Applicant: Apple Inc.

Inventor： Xiaoxia SUN ,  Jiefu ZHAI ,  Ke ZHANG ,  Xiaosong ZHOU ,  Hsi-Jung WU

IPC: G06K9/00 ,  G06K9/46 ,  G06T3/40 ,  G06N3/04

Abstract: Video object and keypoint location detection techniques are presented. The system includes a detection system for generation locations of an object's keypoints along with probabilities associated with the locations, and a stability system for stabilizing keypoint locations of the detected objects. In some aspects, the generated probabilities are two-dimensional array correspond locations within input images, and stability system fits the generated probabilities to a two-dimensional probability distribution function.

公开(公告)号：US20200382806A1

公开(公告)日：2020-12-03

申请号：US16882819

申请日：2020-05-26

Applicant: Apple Inc.

Inventor： Dazhong ZHANG ,  Peikang SONG ,  Beibei WANG ,  Giribalan GOPALAN ,  Albert E. KEINATH ,  Christopher M. GARRIDO ,  David R. CONRAD ,  Hsi-Jung WU ,  Ming JIN ,  Hang YUAN ,  Xiaohua YANG ,  Xiaosong ZHOU ,  Vikrant KASARABADA ,  Davide CONCION ,  Eric L. CHIEN ,  Bess C. CHAN ,  Karthick SANTHANAM ,  Gurtej Singh CHANDOK

IPC: H04N19/507 ,  H04N19/65

Abstract: Techniques are disclosed for coding video data in which frames from a video source are partitioned into a plurality of tiles of common size, and the tiles are coded as a virtual video sequence according to motion-compensated prediction, each tile treated as having respective temporal location of the virtual video sequence. The coding scheme permits relative allocation of coding resources to tiles that are likely to have greater significance in a video coding session, which may lead to certain tiles that have low complexity or low motion content to be skipped during coding of the tiles for select source frames. Moreover, coding of the tiles may be ordered to achieve low coding latencies during a coding session.