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1. 发明授权

US10547863B1 Image statistics for motion detection 有权
公开(公告)号：US10547863B1
公开(公告)日：2020-01-28
申请号：US16100772
申请日：2018-08-10
申请人： Apple Inc.
发明人： Muge Wang , Sheng Lin , Weichun Ku , Hsiao-Chen Chang , Yixiang Tao
IPC分类号： H04N19/513 , H04N19/176 , G06T3/00 , H04N1/60 , G06T5/00
摘要： Embodiments of the present disclosure relate to generating motion vectors. An image signal processor includes a statistics circuit and a vector correlation analysis circuit. The statistics circuit determines image statistics such as vectors representing sums of pixel values of rows or columns of blocks of an image. Additionally, the statistics circuit may mix or aggregate sums of multiple color components. The vector correlation analysis performs cross-correlation between vectors of a current image and reference vectors of a prior image to determine cross-correlation scores. The vector correlation analysis generates a motion vector by identifying shifts in horizontal and vertical directions corresponding to peak values of cross-correlation scores.

2. 发明授权

US09686556B2 Rate-estimation for encoding rate control 有权
公开(公告)号：US09686556B2
公开(公告)日：2017-06-20
申请号：US14871797
申请日：2015-09-30
申请人： Apple Inc.
发明人： Jim C. Chou , Weichun Ku
IPC分类号： H04B3/46 , H04N19/147 , H04N19/503 , H04N19/593 , H04N19/513 , H04N19/567 , H04N19/583 , H04N19/635
CPC分类号： H04N19/147 , H04N19/103 , H04N19/176 , H04N19/503 , H04N19/513 , H04N19/53 , H04N19/567 , H04N19/583 , H04N19/593 , H04N19/635 , H04N19/70 , H04N19/86 , H04N19/91
摘要： System and method for improving operational efficiency of a video encoding pipeline used to encode image data. In embodiments, the video encoding pipeline includes bit-rate statistics generation that is useful for controlling subsequent bit rates and/or determining encoding operational modes.

3. 发明申请

US20150092833A1 PARALLEL ENCODING OF BYPASS BINARY SYMBOLS IN CABAC ENCODER 有权
标题翻译：并行编码CABAC编码器中的旁路二进制符号
公开(公告)号：US20150092833A1
公开(公告)日：2015-04-02
申请号：US14039880
申请日：2013-09-27
申请人： Apple Inc.
发明人： Weichun Ku , Jim C. Chou
IPC分类号： H04N19/13 , H04N19/70 , H04N19/103 , H04N19/176
CPC分类号： H04N19/176 , H04N19/129 , H04N19/13 , H04N19/40 , H04N19/439 , H04N19/463
摘要： A video encoder may include a context-adaptive binary arithmetic coding (CABAC) encode component that converts each syntax element of a representation of a block of pixels to binary code, serializes it, and codes it mathematically with its probability model, after which the resulting bit stream is output. When the probability of a bin being coded with one of two possible symbols is one-half, the bin may be coded using bypass bin coding mode rather than a more compute-intensive regular bin coding mode. The CABAC encoder may code multiple consecutive bypass bins in a series of cascaded processing units during a single processing cycle (e.g., a regular bin coding cycle). Intermediate outputs of each processing unit may be coupled to inputs of the next processing unit. A resolver unit may accept intermediate outputs of the processing units and generate final output bits for the bypass bins.
摘要翻译：视频编码器可以包括上下文自适应二进制算术编码（CABAC）编码组件，其将像素块的表示的每个语法元素转换为二进制码，将其序列化，并用其概率模型对其进行数学编码，之后得到输出位流。当用两个可能符号中的一个编码一个bin的概率为一半时，可以使用旁路箱编码模式而不是更计算密集的常规二进制编码模式对该bin进行编码。 CABAC编码器可以在单个处理周期（例如，常规bin编码周期）期间对一系列级联处理单元中的多个连续旁路仓进行编码。每个处理单元的中间输出可以耦合到下一处理单元的输入。解算器单元可以接收处理单元的中间输出并且产生旁路箱的最终输出位。

4. 发明申请

US20200053377A1 IMAGE STATISTICS FOR MOTION DETECTION 审中-公开
公开(公告)号：US20200053377A1
公开(公告)日：2020-02-13
申请号：US16100772
申请日：2018-08-10
申请人： Apple Inc.
发明人： Muge Wang , Sheng Lin , Weichun Ku , Hsiao-Chen Chang , Yixiang Tao
IPC分类号： H04N19/513 , H04N19/176 , G06T5/00 , H04N1/60 , G06T3/00
摘要： Embodiments of the present disclosure relate to generating motion vectors. An image signal processor includes a statistics circuit and a vector correlation analysis circuit. The statistics circuit determines image statistics such as vectors representing sums of pixel values of rows or columns of blocks of an image. Additionally, the statistics circuit may mix or aggregate sums of multiple color components. The vector correlation analysis performs cross-correlation between vectors of a current image and reference vectors of a prior image to determine cross-correlation scores. The vector correlation analysis generates a motion vector by identifying shifts in horizontal and vertical directions corresponding to peak values of cross-correlation scores.

5. 发明授权

US10158874B2 Parallel bypass and regular bin coding 有权
公开(公告)号：US10158874B2
公开(公告)日：2018-12-18
申请号：US15087760
申请日：2016-03-31
申请人： APPLE INC.
发明人： Jim C. Chou , Syed Muhammad Ali Rizvi , Weichun Ku
IPC分类号： H04N19/10 , H04N19/70 , H04N19/50 , H04N19/91 , H04N19/436
摘要： 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 transcode pipeline that provides entropy encoding of binarized syntax elements. More specifically, multiple bins may be encoded in parallel, resulting in increased encoding throughput.

6. 发明申请

US20150348246A1 SYSTEMS AND METHODS FOR LOCAL TONE MAPPING 有权
标题翻译：用于局部色调映射的系统和方法
公开(公告)号：US20150348246A1
公开(公告)日：2015-12-03
申请号：US14822316
申请日：2015-08-10
申请人： APPLE INC.
发明人： Suk Hwan Lim , D. Amnon Silverstein , Guy Cote , Steven David Hordley , Graham Finlayson , Weichun Ku , Joseph P. Bratt
IPC分类号： G06T5/00 , G06T1/20 , G06K9/38 , G06T5/50
CPC分类号： G06T5/001 , G06K9/38 , G06T1/20 , G06T5/002 , G06T5/003 , G06T5/008 , G06T5/50 , G06T2207/10024 , G06T2207/20012 , G06T2207/20028 , G06T2207/20208
摘要： Systems and methods for local tone mapping are provided. In one example, an electronic device includes an electronic display, an imaging device, and an image signal processor. The electronic display may display images of a first bit depth, and the imaging device may include an image sensor that obtains image data of a higher bit depth than the first bit depth. The image signal processor may process the image data, and may include local tone mapping logic that may apply a spatially varying local tone curve to a pixel of the image data to preserve local contrast when displayed on the display. The local tone mapping logic may smooth the local tone curve applied to the intensity difference between the pixel and another nearby pixel exceeds a threshold.
摘要翻译：提供了本地色调映射的系统和方法。在一个示例中，电子设备包括电子显示器，成像设备和图像信号处理器。电子显示器可以显示第一位深度的图像，并且成像装置可以包括获得比第一位深度更高的位深度的图像数据的图像传感器。图像信号处理器可以处理图像数据，并且可以包括本地色调映射逻辑，其可以将空间上变化的本地色调曲线应用于图像数据的像素，以便在显示器上显示时保持局部对比度。本地色调映射逻辑可以平滑应用于像素和另一附近像素之间的强度差超过阈值的局部色调曲线。

7. 发明授权

US09741099B2 Systems and methods for local tone mapping 有权
公开(公告)号：US09741099B2
公开(公告)日：2017-08-22
申请号：US14822316
申请日：2015-08-10
申请人： APPLE INC.
发明人： Suk Hwan Lim , D. Amnon Silverstein , Guy Cote , Steven David Hordley , Graham Finlayson , Weichun Ku , Joseph P. Bratt
IPC分类号： G06T5/00 , G06T5/50 , G06T1/20 , G06K9/38
CPC分类号： G06T5/001 , G06K9/38 , G06T1/20 , G06T5/002 , G06T5/003 , G06T5/008 , G06T5/50 , G06T2207/10024 , G06T2207/20012 , G06T2207/20028 , G06T2207/20208
摘要： Systems and methods for local tone mapping are provided. In one example, an electronic device includes an electronic display, an imaging device, and an image signal processor. The electronic display may display images of a first bit depth, and the imaging device may include an image sensor that obtains image data of a higher bit depth than the first bit depth. The image signal processor may process the image data, and may include local tone mapping logic that may apply a spatially varying local tone curve to a pixel of the image data to preserve local contrast when displayed on the display. The local tone mapping logic may smooth the local tone curve applied to the intensity difference between the pixel and another nearby pixel exceeds a threshold.

8. 发明申请

US20170094300A1 PARALLEL BYPASS AND REGULAR BIN CODING 审中-公开
公开(公告)号：US20170094300A1
公开(公告)日：2017-03-30
申请号：US15087760
申请日：2016-03-31
申请人： APPLE INC.
发明人： Jim C. Chou , Syed Muhammad Ali Rizvi , Weichun Ku
IPC分类号： H04N19/50 , H04N19/40 , H04N19/91 , H04N19/70
CPC分类号： H04N19/50 , H04N19/436 , H04N19/91
摘要： 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 transcode pipeline that provides entropy encoding of binarized syntax elements. More specifically, multiple bins may be encoded in parallel, resulting in increased encoding throughput.

9. 发明申请

US20170094284A1 RATE-ESTIMATION FOR ENCODING RATE CONTROL 有权
公开(公告)号：US20170094284A1
公开(公告)日：2017-03-30
申请号：US14871797
申请日：2015-09-30
申请人： Apple Inc.
发明人： Jim C. Chou , Weichun Ku
IPC分类号： H04N19/147 , H04N19/593 , H04N19/635 , H04N19/567 , H04N19/583 , H04N19/503 , H04N19/513
CPC分类号： H04N19/147 , H04N19/103 , H04N19/176 , H04N19/503 , H04N19/513 , H04N19/53 , H04N19/567 , H04N19/583 , H04N19/593 , H04N19/635 , H04N19/70 , H04N19/86 , H04N19/91
摘要： System and method for improving operational efficiency of a video encoding pipeline used to encode image data. In embodiments, the video encoding pipeline includes bit-rate statistics generation that is useful for controlling subsequent bit rates and/or determining encoding operational modes.

10. 发明授权

US09392292B2 Parallel encoding of bypass binary symbols in CABAC encoder 有权
标题翻译： CABAC编码器中旁路二进制符号的并行编码
公开(公告)号：US09392292B2
公开(公告)日：2016-07-12
申请号：US14039880
申请日：2013-09-27
申请人： Apple Inc.
发明人： Weichun Ku , Jim C. Chou
IPC分类号： H04N19/13 , H04N19/70 , H04N19/103 , H04N19/176 , H04N19/129 , H04N19/463 , H04N19/40 , H04N19/42
CPC分类号： H04N19/176 , H04N19/129 , H04N19/13 , H04N19/40 , H04N19/439 , H04N19/463
摘要： A video encoder may include a context-adaptive binary arithmetic coding (CABAC) encode component that converts each syntax element of a representation of a block of pixels to binary code, serializes it, and codes it mathematically with its probability model, after which the resulting bit stream is output. When the probability of a bin being coded with one of two possible symbols is one-half, the bin may be coded using bypass bin coding mode rather than a more compute-intensive regular bin coding mode. The CABAC encoder may code multiple consecutive bypass bins in a series of cascaded processing units during a single processing cycle (e.g., a regular bin coding cycle). Intermediate outputs of each processing unit may be coupled to inputs of the next processing unit. A resolver unit may accept intermediate outputs of the processing units and generate final output bits for the bypass bins.
摘要翻译：视频编码器可以包括上下文自适应二进制算术编码（CABAC）编码组件，其将像素块的表示的每个语法元素转换为二进制码，将其序列化，并用其概率模型对其进行数学编码，之后得到输出位流。当用两个可能符号中的一个编码一个bin的概率为一半时，可以使用旁路箱编码模式而不是更计算密集的常规二进制编码模式对该bin进行编码。 CABAC编码器可以在单个处理周期（例如，常规bin编码周期）期间对一系列级联处理单元中的多个连续旁路仓进行编码。每个处理单元的中间输出可以耦合到下一处理单元的输入。解算器单元可以接收处理单元的中间输出并且产生旁路箱的最终输出位。

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