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    SAMPLE ADAPTIVE OFFSET CONTROL
    162.
    发明申请
    SAMPLE ADAPTIVE OFFSET CONTROL 审中-公开

    公开(公告)号：US20140376608A1

    公开(公告)日：2014-12-25

    申请号：US14255609

    申请日：2014-04-17

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis

    IPC: H04N19/186 ,  H04N19/136 ,  H04N19/117

    Abstract: Offset values, such as Sample Adaptive Offset (SAO) values in video coding standards such as the High Efficiency Video Coding standard (HEVC), may be improved by performing calculations and operations that improve the preciseness of these values without materially affecting the signal overhead needed to transmit the more precise values. Such calculations and operations may include applying a quantization factor to a video sample and at least some of its neighbors, comparing the quantized values, and classifying the video sample as a minimum, maximum, or one of various types of edges based on the comparison. Other sample range, offset mode, and/or offset precision parameters may be calculated and transmitted with metadata to improve the precision of offset values.

    ADAPTIVE COLOR SPACE TRANSFORM CODING
    163.
    发明申请
    ADAPTIVE COLOR SPACE TRANSFORM CODING 有权

    公开(公告)号：US20140355689A1

    公开(公告)日：2014-12-04

    申请号：US13940025

    申请日：2013-07-11

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis

    IPC: H04N19/60

    CPC classification number: H04N19/46 ,  H04N1/64 ,  H04N19/122 ,  H04N19/186 ,  H04N19/198

    Abstract: An encoder system may include an analyzer that analyzes a current image area in an input video to select a transform. A selectable residue transformer, controlled by the analyzer, may perform the selectable transform on a residue image generated from the current image area and a predicted current image area, to generate a transformed residue image. An encoder may encode the transformed residue image to generate output data. The analyzer controls the encoder to encode information to identify the selectable transform and to indicate that the selectable transform for the current image area is different from a transform of a previous image area of the input video. A decoder system may include components appropriate for decoding the output data from the encoder system.

    ENTROPY CODING TECHNIQUES AND PROTOCOL TO SUPPORT PARALLEL PROCESSING WITH LOW LATENCY
    164.
    发明申请
    ENTROPY CODING TECHNIQUES AND PROTOCOL TO SUPPORT PARALLEL PROCESSING WITH LOW LATENCY 有权
    EN Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y

    公开(公告)号：US20140044194A1

    公开(公告)日：2014-02-13

    申请号：US13715088

    申请日：2012-12-14

    Applicant: APPLE INC.

    Inventor： David W. Singer ,  Alexandros Tourapis ,  Athanasios Leontaris ,  Xiaosong Zhou

    IPC: H04N7/26

    CPC classification number: H04N19/13 ,  H04N19/117 ,  H04N19/174 ,  H04N19/436 ,  H04N19/70

    Abstract: In a communication system, parallel encoding and decoding of serially-coded data occurs in a manner that supports low latency communication. A plurality of data items may be coded as serially-coded data sequences and a transmission sequence may be built from them. An index table may be built having a plurality of entries representing respective start points of the serially-coded data sequences within the transmission sequence. The transmission sequence may be transmitted to a channel and, thereafter, the index table may be transmitted. Latencies otherwise involved in inserting an index table into the beginning of a transmission sequence may be avoided.

    Abstract translation: 在通信系统中，串行编码数据的并行编码和解码以支持低延迟通信的方式发生。 多个数据项可以被编码为串行编码数据序列，并且可以从它们构建传输序列。 可以构建索引表，其具有表示传输序列内的串行编码数据序列的相应开始点的多个条目。 发送序列可以被发送到信道，此后可以发送索引表。 可以避免将索引表插入到传输序列的开始处的延迟。

    REDUCING BLOCKINESS FOR CODECS
    165.
    发明申请
    REDUCING BLOCKINESS FOR CODECS 有权

    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.

    VIDEO CODEC BUFFER QUANTITY REDUCTION
    168.
    发明申请
    VIDEO CODEC BUFFER QUANTITY REDUCTION 有权

    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.

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