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1. 发明申请

US20230092305A1 PRIORITY-BASED VIDEO ENCODING AND TRANSMISSION 有权
公开(公告)号：US20230092305A1
公开(公告)日：2023-03-23
申请号：US18052807
申请日：2022-11-04
申请人： Apple Inc.
发明人： Sorin C. Cismas , Jim C. Chou , Ling Su , Keangpo R. Ho
IPC分类号： H04N19/37 , H04N19/119 , H04N19/164 , H04N19/167 , H04N19/174 , H04N19/176 , H04N19/169 , H04N19/46 , H04N19/63
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 that encodes the blocks and passes the encoded blocks to a wireless interface that packetizes the blocks for transmittal over a wireless connection. The encoder may categorize the encoded frequency bands into multiple priority levels, and may tag each frequency block with metadata indicating the frequency band represented in the block, the priority of the frequency band, and timing information. The wireless interface may then transmit or drop packets according to the priority levels of the encoded frequency blocks in the packets and/or according to the timing information of the frequency blocks in the packets.

2. 发明授权

US11451788B2 Rate control for low latency video encoding and transmission 有权
公开(公告)号：US11451788B2
公开(公告)日：2022-09-20
申请号：US17252701
申请日：2019-06-27
申请人： Apple Inc.
发明人： Hao Pan , Jim C. Chou , Felix C. Fernandes
IPC分类号： H04N19/146 , H04L29/06 , H04N19/14 , H04N19/169 , H04N19/176 , H04N19/63 , H04L65/60
摘要： A video encoding system in which pixel data is decomposed into frequency bands prior to encoding. The frequency bands for a slice of a frame may be buffered so that complexity statistics may be calculated across the frequency bands prior to encoding. The statistics may then be used by a rate control component in determining quantization parameters for the frequency bands for modulating the rate in the encoder for the current slice. The quantization parameters for the frequency bands may be calculated jointly to optimize the quality of the displayed frames after decoder reconstruction and wavelet synthesis on a receiving device. Information about one or more previously processed frames may be used in combination with the statistics for a current slice in determining the quantization parameters for the current slice.

3. 发明申请

US20210274200A1 PRIORITY-BASED VIDEO ENCODING AND TRANSMISSION 有权
公开(公告)号：US20210274200A1
公开(公告)日：2021-09-02
申请号：US17252697
申请日：2019-06-27
申请人： Apple Inc.
发明人： Sorin C. Cismas , Jim C. Chou , Ling Su , Keangpo R. Ho
IPC分类号： H04N19/37 , H04N19/176 , H04N19/169 , H04N19/63 , H04N19/164 , H04N19/167 , H04N19/46 , H04N19/174 , H04N19/119
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 that encodes the blocks and passes the encoded blocks to a wireless interface that packetizes the blocks for transmittal over a wireless connection. The encoder may categorize the encoded frequency bands into multiple priority levels, and may tag each frequency block with metadata indicating the frequency band represented in the block, the priority of the frequency band, and timing information. The wireless interface may then transmit or drop packets according to the priority levels of the encoded frequency blocks in the packets and/or according to the timing information of the frequency blocks in the packets.

4. 发明申请

US20200043138A1 CHROMINANCE AND LUMINANCE ENHANCING SYSTEMS AND METHODS 审中-公开
公开(公告)号：US20200043138A1
公开(公告)日：2020-02-06
申请号：US16053342
申请日：2018-08-02
申请人： Apple Inc.
发明人： Jim C. Chou , Haiyan He , Yun Gong
IPC分类号： G06T5/00 , G06T3/40 , G06T5/20 , G06T7/90
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.

5. 发明授权

US10521881B1 Error concealment for a head-mountable device 有权
公开(公告)号：US10521881B1
公开(公告)日：2019-12-31
申请号：US16015788
申请日：2018-06-22
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.

6. 发明授权

US09807410B2 Late-stage mode conversions in pipelined video encoders 有权
公开(公告)号：US09807410B2
公开(公告)日：2017-10-31
申请号：US14322711
申请日：2014-07-02
申请人： Apple Inc.
发明人： Jim C. Chou , Guy Cote
IPC分类号： H04N7/12 , H04N19/46 , H04N19/182 , H04N19/176 , H04N19/139 , H04N19/103 , H04N19/157 , H04N19/40 , H04N19/42 , H04N19/124 , H04N19/167
CPC分类号： H04N19/46 , H04N19/103 , H04N19/124 , H04N19/139 , H04N19/157 , H04N19/167 , H04N19/176 , H04N19/182 , H04N19/40 , H04N19/439
摘要： Video encoders may determine an initial designation of a mode in which to encode a block of pixels in an early stage of a block processing pipeline. A component of a late stage of the block processing pipeline (one that precedes the transcoder) may determine a different mode designation for the block of pixels based on coded block pattern information, motion vector information, the position of the block in a row of such blocks, the order in which such blocks are processed in the pipeline, or other encoding related syntax elements. The component in the late stage may communicate information to the transcoder usable in coding the block of pixels, such as modified syntax elements or an end of row marker. The transcoder may encode the block of pixels in accordance with the different mode designation or may change the mode again, dependent on the communicated information.

7. 发明授权

US09571846B2 Data storage and access in block processing pipelines 有权
标题翻译：块处理管道中的数据存储和访问
公开(公告)号：US09571846B2
公开(公告)日：2017-02-14
申请号：US14039764
申请日：2013-09-27
申请人： Apple Inc.
发明人： Timothy John Millet , Mark P. Rygh , Craig M. Okruhlica , Jim C. Chou , Guy Cote , Gaurav S. Gulati , Joseph J. Cheng , Joseph P. Bratt
IPC分类号： H04N19/423 , H04N19/56 , H04N19/53
CPC分类号： H04N19/423 , H04N19/53
摘要： Block processing pipeline methods and apparatus in which reference data are stored to a memory according to tile formats to reduce memory accesses when fetching the data from the memory. When the pipeline stores reference data from a current frame being processed to memory as a reference frame, the reference samples are stored in macroblock sequential order. Each macroblock sample set is stored as a tile. Reference data may be stored in tile formats for luma and chroma. Chroma reference data may be stored in tile formats for chroma 4:2:0, 4:2:2, and/or 4:4:4 formats. A stage of the pipeline may write luma and chroma reference data for macroblocks to memory according to one or more of the macroblock tile formats in a modified knight's order. The stage may delay writing the reference data from the macroblocks until the macroblocks have been fully processed by the pipeline.
摘要翻译：块处理管道方法和装置，其中参考数据根据瓦片格式存储到存储器中，以在从存储器取出数据时减少存储器访问。当流水线将正在处理的当前帧的参考数据存储为参考帧时，参考样本以宏块顺序存储。每个宏块样本集被存储为一个图块。参考数据可以以瓦片和色度的瓦片格式存储。色度参考数据可以以瓦4：2：0,4：2：2和/或4：4：4格式的瓦片格式存储。流水线的一个阶段可以根据改进的骑士顺序中的一个或多个宏块瓦片格式将宏块的亮度和色度参考数据写入存储器。该阶段可以延迟从宏块写入参考数据，直到宏块已被管道完全处理。

8. 发明授权

US09569816B2 Debanding image data using bit depth expansion 有权
标题翻译：使用位深度扩展来调整图像数据
公开(公告)号：US09569816B2
公开(公告)日：2017-02-14
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： G09G5/28 , G09G5/39 , 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。

9. 发明授权

US09495731B2 Debanding image data based on spatial activity 有权
标题翻译：基于空间活动对图像数据进行调色
公开(公告)号：US09495731B2
公开(公告)日：2016-11-15
申请号：US14687478
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： G06K9/40 , G06T5/00 , G06T5/20 , G06T5/50 , H04N19/117
CPC分类号： G06T5/002 , G06K9/40 , G06T5/20 , G06T5/50 , G06T2207/20182 , G06T2207/20221 , H04N19/117 , H04N19/136 , H04N19/182 , H04N19/86
摘要： A method for attenuating banding in image data may involve receiving a stream of input pixels. The method may then include applying a bi-lateral filter to a first portion of the stream of input pixels to generate a first filtered output and applying a high pass filter to a second portion of the stream of input pixels to generate a second filtered output. The method may then determine a local activity and a local intensity associated with the first portion of the stream. The method may then include blending the first filtered output with the first portion of the stream of input pixels based at least in part on the local activity and the local intensity to generate a third filtered output. Afterward, the method may combine the third filtered output with the second filtered output to generate a fourth filtered output that may be output as the image data.
摘要翻译：用于衰减图像数据中的条带的方法可以涉及接收输入像素的流。该方法可以包括将双向滤波器应用于输入像素流的第一部分以产生第一滤波输出并将高通滤波器应用于输入像素流的第二部分以产生第二滤波输出。该方法然后可以确定与流的第一部分相关联的局部活动和局部强度。该方法可以包括至少部分地基于局部活动和局部强度来混合第一滤波输出与输入像素流的第一部分以产生第三滤波输出。之后，该方法可以组合第三滤波输出和第二滤波输出，以产生可以作为图像数据输出的第四滤波输出。

10. 发明申请

US20160307302A1 DEBANDING IMAGE DATA BASED ON SPATIAL ACTIVITY 有权
标题翻译：基于空间活动来识别图像数据
公开(公告)号：US20160307302A1
公开(公告)日：2016-10-20
申请号：US14687478
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： G06T5/00 , G06T5/50 , G06T5/20
CPC分类号： G06T5/002 , G06K9/40 , G06T5/20 , G06T5/50 , G06T2207/20182 , G06T2207/20221 , H04N19/117 , H04N19/136 , H04N19/182 , H04N19/86
摘要： A method for attenuating banding in image data may involve receiving a stream of input pixels. The method may then include applying a bi-lateral filter to a first portion of the stream of input pixels to generate a first filtered output and applying a high pass filter to a second portion of the stream of input pixels to generate a second filtered output. The method may then determine a local activity and a local intensity associated with the first portion of the stream. The method may then include blending the first filtered output with the first portion of the stream of input pixels based at least in part on the local activity and the local intensity to generate a third filtered output. Afterward, the method may combine the third filtered output with the second filtered output to generate a fourth filtered output that may be output as the image data.
摘要翻译：用于衰减图像数据中的条带的方法可以涉及接收输入像素的流。该方法可以包括将双向滤波器应用于输入像素流的第一部分以产生第一滤波输出并将高通滤波器应用于输入像素流的第二部分以产生第二滤波输出。该方法然后可以确定与流的第一部分相关联的局部活动和局部强度。该方法可以包括至少部分地基于局部活动和局部强度来混合第一滤波输出与输入像素流的第一部分以产生第三滤波输出。之后，该方法可以组合第三滤波输出和第二滤波输出，以产生可以作为图像数据输出的第四滤波输出。

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