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41. 发明授权

US10403192B2 Dithering techniques for electronic displays 有权
公开(公告)号：US10403192B2
公开(公告)日：2019-09-03
申请号：US15655591
申请日：2017-07-20
申请人： APPLE INC.
发明人： Marc Albrecht , Mahesh B. Chappalli , Christopher P. Tann , Jim C. Chou , Guy Cote
IPC分类号： G09G3/20 , G09G3/32 , G09G3/36 , G09G3/3208
摘要： Devices and methods for error diffusion and spatiotemporal dithering are provided. By way of example, a method of operating a display includes receiving a pixel input, a set of pixel coordinates, and a current frame number. A kernel and a particular kernel bit of the kernel is selected from a set of kernels, based upon the pixel input, the pixel coordinates, the frame number, or any combination thereof. A dithered output is determined based at least in part upon the kernel bit. When the display is in a diamond pixel configuration, the dithered output is applied in accordance with a diamond pattern formed by red, blue, or red and blue pixel channels.

42. 发明授权

US10225572B2 Configurable motion estimation search systems and methods 有权
公开(公告)号：US10225572B2
公开(公告)日：2019-03-05
申请号：US14871848
申请日：2015-09-30
申请人： Apple Inc.
发明人： Jim C. Chou , Mark P. Rygh , Guy Côté
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , H04N19/42 , H04N19/139 , H04N19/147 , H04N19/182 , H04N19/186 , H04N19/109 , H04N19/156 , H04N19/157 , H04N19/17
摘要： System and method for improving operational efficiency of a video encoding pipeline used to encode image data. The video encoding pipeline includes a motion estimation setup block, which dynamically adjusts a setup configuration of the motion estimation block based at least in part on operational parameters of the video encoding pipeline and select an initial candidate inter-frame prediction mode based at least on the setup configuration, a full-pel motion estimation block, which determines an intermediate candidate inter-frame prediction mode by performing a motion estimation search based on the initial candidate inter-frame prediction mode, a sub-pel motion estimation block, which determines a final candidate inter-frame prediction by performing a motion estimation search based on the intermediate candidate inter-frame prediction mode, and a mode decision block, which determines a rate-distortion cost associated with the final candidate inter-frame prediction mode and determines a prediction mode used to prediction encoding the image data.

43. 发明申请

US20160307298A1 DEBANDING IMAGE DATA USING BIT DEPTH EXPANSION 有权
标题翻译：使用位深度扩展来识别图像数据
公开(公告)号：US20160307298A1
公开(公告)日：2016-10-20
申请号：US14687513
申请日：2015-04-15
申请人： Apple Inc.
发明人： Jim C. Chou , Guy Cote , Haiyan He
IPC分类号： G06T3/40 , G06T5/00
CPC分类号： G06T3/4007 , G06T5/001 , G06T5/002 , G06T5/10 , G06T2207/10024 , G06T2207/20012 , G06T2207/20028 , G06T2207/20048
摘要： An image signal processing system may include processing circuitry that may reduce banding artifacts in image data to be depicted on a display. The processing circuitry may receive a first pixel value associated with a first pixel of the image data and detect a first set of pixels located in a first direction along a same row of pixels or a same column of pixels with respect to the first pixel. The first set of pixels is associated with a first band. The processing circuitry may then interpolate a second pixel value based on an average of a first set of pixel values that correspond to the first set of pixels and a distance between the first pixel and a closest pixel in the first band. The processing circuitry may then output the second pixel value for the first pixel.
摘要翻译：图像信号处理系统可以包括可以减少要在显示器上描绘的图像数据中的带状伪影的处理电路。处理电路可以接收与图像数据的第一像素相关联的第一像素值，并且相对于第一像素沿同一行像素或相同列的像素检测位于第一方向上的第一组像素。第一组像素与第一个带相关联。然后，处理电路可以基于对应于第一组像素的第一组像素值的平均值和第一像素与第一像素中的最近像素之间的距离来内插第二像素值。处理电路然后可以输出第一像素的第二像素值。

44. 发明申请

US20160007046A1 ESTIMATING RATE COSTS IN VIDEO ENCODING OPERATIONS USING ENTROPY ENCODING STATISTICS 有权
标题翻译：使用熵编码统计在视频编码操作中估算费用
公开(公告)号：US20160007046A1
公开(公告)日：2016-01-07
申请号：US14322720
申请日：2014-07-02
申请人： Apple Inc.
发明人： Jim C. Chou
IPC分类号： H04N19/70 , H04N19/513 , H04N19/46 , H04N19/176 , H04N19/182
CPC分类号： H04N19/13 , H04N19/103 , H04N19/149 , H04N19/1887
摘要： 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.
摘要翻译：块处理流水线（例如，CABAC编码器）的熵编码级的分量可以对于视频帧中的像素块累积计数，其指示在编码语法元素中使用两个可能符号中的每一个的次数 bin。取决于符号计数，可以计算每个符号的经验概率，估计熵和用于编码仓的估计速率成本。在熵编码阶段之前的流水线阶段可以在接收到用于视频帧的另一个像素块时，基于包括速率成本项的成本函数来对其它像素块进行编码决定时计算并使用估计的速率成本。符号计数或经验概率可以传递到较早的流水线阶段或写入共享存储器，较早阶段的组件可以从其获得它们。

45. 发明申请

US20150091914A1 PROCESSING ORDER IN BLOCK PROCESSING PIPELINES 有权
标题翻译：块加工管道中的加工订单
公开(公告)号：US20150091914A1
公开(公告)日：2015-04-02
申请号：US14039820
申请日：2013-09-27
申请人： Apple Inc.
发明人： Guy Cote , Mark P. Rygh , Timothy John Millet , Jim C. Chou , Joseph J. Cheng
IPC分类号： G06T1/20
CPC分类号： G06T1/20 , H04N19/423 , H04N19/436 , H04N19/61
摘要： A knight's order processing method for block processing pipelines in which the next block input to the pipeline is taken from the row below and one or more columns to the left in the frame. The knight's order method may provide spacing between adjacent blocks in the pipeline to facilitate feedback of data from a downstream stage to an upstream stage. The rows of blocks in the input frame may be divided into sets of rows that constrain the knight's order method to maintain locality of neighbor block data. Invalid blocks may be input to the pipeline at the left of the first set of rows and at the right of the last set of rows, and the sets of rows may be treated as if they are horizontally arranged rather than vertically arranged, to maintain continuity of the knight's order algorithm.
摘要翻译：一种用于块处理管线的骑士订单处理方法，其中从管线的下一个块输入下一个块，并且在该帧中从左侧获取一个或多个列。骑士的订单方法可以在管道中的相邻块之间提供间隔，以便于数据从下游阶段到上游阶段的反馈。输入帧中的块行可以被划分为限制骑士命令方法以维持相邻块数据的位置的行的集合。无效的块可以被输入到第一组行的左侧和最后一组行的右侧的流水线，并且这些行的集合可以被视为水平排列而不是垂直排列，以保持连续性的骑士秩序算法。

46. 发明授权

US11551336B2 Chrominance and luminance enhancing systems and methods 有权
公开(公告)号：US11551336B2
公开(公告)日：2023-01-10
申请号：US17006779
申请日：2020-08-28
申请人： Apple inc.
发明人： Jim C. Chou , Haiyan He , Yun Gong
IPC分类号： G06T5/00 , G06T3/40 , G06T7/90 , G06T5/20
摘要： An electronic device may include enhancement circuitry to enhance high resolution image data to improve perceived quality of an image corresponding to the high resolution image data. The enhancement circuitry may include tone detection circuitry to determine one or more tones within the image and apply changes to the high resolution image data based on the one or more tones. The enhancement circuitry may also include example-based improvement circuitry to compare the high resolution image data to low resolution image data and apply changes to the high resolution image data based on differences between sections of the high resolution image data and sections of the low resolution image data. The enhancement circuitry may also include channel processing circuitry to apply the first and second changes to one or more channels of the high resolution image data.

47. 发明授权

US11276143B2 Error concealment for a head-mountable device 有权
公开(公告)号：US11276143B2
公开(公告)日：2022-03-15
申请号：US17114796
申请日：2020-12-08
申请人： Apple Inc.
发明人： Tobias Eble , Jim C. Chou , Jian Zhou , Moinul Khan , Hariprasad Puthukkootil Rajagopal
IPC分类号： G06T3/00 , G02B27/01 , G06T7/593 , G06T5/00
摘要： In various implementations, a method includes obtaining a first frame that is characterized by a first resolution associated with a first memory allocation. In some implementations, the method includes down-converting the first frame from the first resolution to a second resolution that is lower than the first resolution initially defining the first frame in order to produce a reference frame. In some implementations, the second resolution is associated with a second memory allocation that is less than a target memory allocation derived from the first memory allocation. In some implementations, the method includes storing the reference frame in a non-transitory memory. In some implementations, the method includes obtaining a second frame that is characterized by the first resolution. In some implementations, the method includes performing an error correction operation on the second frame based on the reference frame stored in the non-transitory memory.

48. 发明申请

US20210250616A1 VIDEO ENCODING SYSTEM 有权
公开(公告)号：US20210250616A1
公开(公告)日：2021-08-12
申请号：US17252700
申请日：2019-06-27
申请人： Apple Inc.
发明人： Jim C. Chou , Sorin C. Cismas
IPC分类号： H04N19/63 , H04N19/176 , H04N19/117 , H04N19/147 , H04N19/174 , H04N19/18
摘要： A video encoding system in which pixel data is decomposed into frequency bands prior to encoding. The frequency bands are organized into blocks that are provided to a block-based encoder. The encoded frequency data is packetized and transmitted to a receiving device. On the receiving device, the encoded data is decoded to recover the frequency bands. Wavelet synthesis is then performed on the frequency bands to reconstruct the pixel data for display. The system may encode parts of frames (tiles or slices) using one or more encoders and transmit the encoded parts as they are ready. A pre-filter component may perform a lens warp on the pixel data prior to the wavelet transform.

49. 发明授权

US11064387B1 Adaptive wireless transmission schemes 有权
公开(公告)号：US11064387B1
公开(公告)日：2021-07-13
申请号：US16411302
申请日：2019-05-14
申请人： Apple Inc.
发明人： Aleksandr M. Movshovich , Arthur Y. Zhang , Hao Pan , Holly E. Gerhard , Jim C. Chou , Moinul H. Khan , Paul V. Johnson , Sorin C. Cismas , Sreeraman Anantharaman , William W. Sprague
IPC分类号： H04W28/06 , H04W24/08 , H04N13/398 , H04N13/344 , H04N13/194
摘要： One exemplary implementation involves performing operations at an electronic device with one or more processors and a computer-readable storage medium. The device establishes a wireless communication link with a host device. The device receives, from the host device, a left eye frame and a right eye frame via a sequence of left eye frame transmissions and right eye frame transmissions. The device switches data transmissions schemes according to wireless commination link quality or eye gaze tracking. Adjusting transmission format based on transmission quality of the wireless communication link allows the devices to take advantage of greater bandwidth when available to save power. An additional transmission format is based on alternately transmitting left eye and right eye frames for very low bandwidth.

50. 发明申请

US20210118090A1 ERROR CONCEALMENT FOR A HEAD-MOUNTABLE DEVICE 有权
公开(公告)号：US20210118090A1
公开(公告)日：2021-04-22
申请号：US17114796
申请日：2020-12-08
申请人： Apple Inc.
发明人： Tobias Eble , Jim C. Chou , Jian Zhou , Moinul Khan , Hariprasad Puthukkootil Rajagopal
IPC分类号： G06T3/00 , G02B27/01 , G06T7/593 , G06T5/00
摘要： In various implementations, a method includes obtaining a first frame that is characterized by a first resolution associated with a first memory allocation. In some implementations, the method includes down-converting the first frame from the first resolution to a second resolution that is lower than the first resolution initially defining the first frame in order to produce a reference frame. In some implementations, the second resolution is associated with a second memory allocation that is less than a target memory allocation derived from the first memory allocation. In some implementations, the method includes storing the reference frame in a non-transitory memory. In some implementations, the method includes obtaining a second frame that is characterized by the first resolution. In some implementations, the method includes performing an error correction operation on the second frame based on the reference frame stored in the non-transitory memory.

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