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    Statistical noise estimation systems and methods
    51.
    发明授权
    Statistical noise estimation systems and methods 有权

    公开(公告)号：US10719916B2

    公开(公告)日：2020-07-21

    申请号：US16053324

    申请日：2018-08-02

    Applicant: Apple Inc.

    Inventor： Haiyan He ,  Jim C. Chou

    IPC: G06T5/00 ,  G06T5/20 ,  G06K9/62 ,  G06T7/11 ,  G06T7/90 ,  G06T5/40 ,  G06T3/40

    Abstract: An electronic device may include noise statistics circuitry to receive input image data corresponding to an image displayable on an electronic display. The input image data may include one or more channels of pixel data. The noise statistics circuitry may also determine a subset of pixel data of a channel of pixel data that qualifies for statistics gathering according to qualification criteria. Additionally, the noise statistics circuitry may determine noise statistics based on the subset of pixel data, and identify image features within the subset of pixel data based on the noise statistics. The image features may include frequency signatures, differentiated from noise, that correspond to features of content of the image. The electronic device may also include enhancement circuitry to enhance the input image data based on the noise statistics and the identified image features. Such enhancement circuitry may substantially preserve the image features within the input image data.

    DIRECTIONAL SCALING SYSTEMS AND METHODS
    52.
    发明申请
    DIRECTIONAL SCALING SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20200043139A1

    公开(公告)日：2020-02-06

    申请号：US16053360

    申请日：2018-08-02

    Applicant: Apple Inc.

    Inventor： Jim C. Chou ,  Yun Gong

    IPC: G06T5/00 ,  G06T3/40 ,  G06T5/50

    Abstract: An electronic device may include scaling circuitry to scale input pixel data to a greater resolution. The directional scaling circuitry may include first interpolation circuitry to receive best mode data, including one or more angles corresponding to content of the image and interpolate first pixel values at first pixel positions diagonally offset from input pixel positions of the input pixel data based on the best mode data and input pixel values corresponding to the input pixel positions. The directional scaling circuitry may also include second interpolation circuitry to receive the best mode data and the input pixel values and interpolate second pixel values at second pixel positions horizontally or vertically offset from the input pixel positions based at least in part on the best mode data and the input pixel values.

    STATISTICAL NOISE ESTIMATION SYSTEMS AND METHODS
    53.
    发明申请
    STATISTICAL NOISE ESTIMATION SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20200043137A1

    公开(公告)日：2020-02-06

    申请号：US16053324

    申请日：2018-08-02

    Applicant: Apple Inc.

    Inventor： Haiyan He ,  Jim C. Chou

    IPC: G06T5/00 ,  G06T5/20 ,  G06K9/62 ,  G06T7/90 ,  G06T7/11

    Abstract: An electronic device may include noise statistics circuitry to receive input image data corresponding to an image displayable on an electronic display. The input image data may include one or more channels of pixel data. The noise statistics circuitry may also determine a subset of pixel data of a channel of pixel data that qualifies for statistics gathering according to qualification criteria. Additionally, the noise statistics circuitry may determine noise statistics based on the subset of pixel data, and identify image features within the subset of pixel data based on the noise statistics. The image features may include frequency signatures, differentiated from noise, that correspond to features of content of the image. The electronic device may also include enhancement circuitry to enhance the input image data based on the noise statistics and the identified image features. Such enhancement circuitry may substantially preserve the image features within the input image data.

    Multiple transcode engine systems and methods
    54.
    发明授权
    Multiple transcode engine systems and methods 有权

    公开(公告)号：US10523973B2

    公开(公告)日：2019-12-31

    申请号：US15274045

    申请日：2016-09-23

    Applicant: Apple Inc.

    Inventor： Jim C. Chou ,  Syed Muhammad A. Rizvi

    IPC: H04N19/91 ,  H04N19/127 ,  H04N19/156 ,  H04N19/174 ,  H04N19/436

    Abstract: Systems and methods for improving determination of encoded image data using a video encoding pipeline, which includes a first transcode engine that entropy encodes a first portion of a bin stream to determine a first bit stream including first encoded image data that indicates a first coding group row and that determines first characteristic data corresponding to the first bit stream to facilitate communicating a combined bit stream; and a second transcode engine that entropy encode a second portion of the bin stream to determine a second bit stream including second encoded image data that indicates a second coding group row while the first transcode engine entropy encodes the first portion of the bin stream and that determines second characteristic data corresponding to the second bit stream to facilitate communicating the combined bit stream, which includes the first bit stream and the second bit stream, to a decoding device.

    Memory-to-memory low resolution motion estimation systems and methods
    55.
    发明授权
    Memory-to-memory low resolution motion estimation systems and methods 有权

    公开(公告)号：US10187655B2

    公开(公告)日：2019-01-22

    申请号：US14871827

    申请日：2015-09-30

    Applicant: Apple Inc.

    Inventor： Jim C. Chou ,  Mark P. Rygh ,  Guy Cõté

    IPC: H04N19/53 ,  H04N19/52 ,  H04N19/109 ,  H04N19/567 ,  H04N19/147 ,  H04N19/56 ,  H04N19/179 ,  H04N19/186 ,  H04N19/70 ,  H04N19/117 ,  H04N19/13 ,  H04N19/132 ,  H04N19/40 ,  H04N19/139 ,  H04N19/159 ,  H04N19/593

    Abstract: System and method for improving operational efficiency of a video encoding pipeline used to encode image data. In embodiments, the video encoding pipeline includes a low resolution pipeline that includes a low resolution motion estimation block, which generates downscaled image data by reducing resolution of the image data and determines a low resolution inter-frame prediction mode by performing a motion estimation search using the downscaled image data and previously downscaled image data. The video encoding pipeline also includes a main pipeline in parallel with the low resolution pipeline that includes a motion estimation block, which determines a candidate inter-frame prediction mode based at least in part on the low resolution inter-frame prediction mode, and a mode decision block, which determines a first rate-distortion cost associated with the candidate inter-frame prediction mode and determines prediction mode used to prediction encode the image data based at least in part on the first rate-distortion cost.

    Estimating rate costs in video encoding operations using entropy encoding statistics
    57.
    发明授权
    Estimating rate costs in video encoding operations using entropy encoding statistics 有权

    公开(公告)号：US09948934B2

    公开(公告)日：2018-04-17

    申请号：US14322720

    申请日：2014-07-02

    Applicant: Apple Inc.

    Inventor： Jim C. Chou

    IPC: H04N19/176 ,  H04N19/182 ,  H04N19/46 ,  H04N19/513 ,  H04N19/70 ,  H04N19/13 ,  H04N19/149 ,  H04N19/103 ,  H04N19/169

    CPC classification number: H04N19/13 ,  H04N19/103 ,  H04N19/149 ,  H04N19/1887

    Abstract: A component of an entropy encoding stage of a block processing pipeline (e.g., a CABAC encoder) may, for a block of pixels in a video frame, accumulate counts indicating the number of times each of two possible symbols is used in encoding a syntax element bin. An empirical probability for each symbol, an estimated entropy, and an estimated rate cost for encoding the bin may be computed, dependent on the symbol counts. A pipeline stage that precedes the entropy encoding stage may, upon receiving another block of pixels for the video frame, calculate and use the estimated rate cost when making encoding decisions for the other block of pixels based on a cost function that includes a rate cost term. The symbol counts or empirical probabilities may be passed to the earlier pipeline stage or written to a shared memory, from which components of the earlier stage may obtain them.

    PREDICTOR CANDIDATES FOR MOTION ESTIMATION SEARCH SYSTEMS AND METHODS
    60.
    发明申请
    PREDICTOR CANDIDATES FOR MOTION ESTIMATION SEARCH SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20170094304A1

    公开(公告)日：2017-03-30

    申请号：US14871778

    申请日：2015-09-30

    Applicant: Apple Inc.

    Inventor： Jim C. Chou ,  Mark P. Rygh ,  Guy Côté

    IPC: H04N19/52 ,  H04N19/573 ,  H04N19/567 ,  H04N19/587 ,  H04N19/583 ,  H04N19/59

    CPC classification number: H04N19/52 ,  H04N19/156 ,  H04N19/523 ,  H04N19/533 ,  H04N19/567 ,  H04N19/57 ,  H04N19/573 ,  H04N19/583 ,  H04N19/587 ,  H04N19/59 ,  H04N19/61

    Abstract: System and method for improving operational efficiency of a video encoding pipeline used to encode image data. The video encoding pipeline includes a mode decision block, which selects a first inter-frame prediction mode used to prediction encode a first prediction unit, and a motion estimation block, which receives the first inter-frame prediction mode as feedback from the mode decision block when processing a second prediction unit; determines an initial candidate inter-frame prediction mode of the second prediction unit based at least in part on the first inter-frame prediction mode; and determines a final candidate inter-frame prediction mode of the second prediction unit by performing a first motion estimation search based at least in part on the initial candidate inter-frame prediction mode. The mode decision block determines a rate-distortion cost associated with the final candidate inter-frame prediction mode and a prediction mode used to prediction encode the second prediction unit based at least in part on the rate-distortion cost.

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