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公开(公告)号：US08493501B2
公开(公告)日：2013-07-23
申请号：US13292353
申请日：2011-11-09
IPC分类号： H04N5/238
CPC分类号： H04N5/2351
摘要： A scene-aware auto-exposure control process stabilizes changes in a camera's auto-exposure settings so as to reduce lighting and color flicker during image capture operations. A metric, referred to as the Modified Adjusted Luminance (MAL) metric, is defined to remain relatively constant as long as the lighting of the scene being captured remains relatively constant. Thus, scene changes such as an object moving into, out of, or around in a scene do not significantly affect the MAL metric's value and do not, therefore, trigger an exposure adjustment. Once the MAL metric indicates a scene's lighting is stable, the camera's auto-exposure operation may be suppressed. As long as incoming frames indicate a stable lighting condition (based on the MAL metric), auto-exposure operation may remain suppressed. When incoming frames result in a substantially different MAL over a specified number of frames, auto-exposure operation may be restored.
摘要翻译： 场景感知自动曝光控制过程可稳定照相机自动曝光设置的变化，以减少图像拍摄过程中的照明和颜色闪烁。 被称为修正调整亮度（MAL）度量的度量被定义为保持相对恒定，只要被捕获的场景的照明保持相对恒定。 因此，诸如移动到场景中的，离开或在场景中的对象的场景改变不会显着影响MAL度量的值，因此不会触发曝光调整。 一旦MAL指标表明场景的照明是稳定的，则可能会抑制相机的自动曝光操作。 只要进入的帧指示稳定的照明条件（基于MAL度量），自动曝光操作可能仍然被抑制。 当输入帧在指定数量的帧上导致基本上不同的MAL时，可以恢复自动曝光操作。
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公开(公告)号：US20110298965A1
公开(公告)日：2011-12-08
申请号：US12793848
申请日：2010-06-04
IPC分类号： H04N5/235
CPC分类号： H04N5/2351
摘要： A scene-aware auto-exposure control process stabilizes changes in a camera's auto-exposure settings so as to reduce lighting and color flicker during image capture operations. A metric, referred to as the Modified Adjusted Luminance (MAL) metric, is defined to remain relatively constant as long as the lighting of the scene being captured remains relatively constant. Thus, scene changes such as an object moving into, out of, or around in a scene do not significantly affect the MAL metric's value and do not, therefore, trigger an exposure adjustment. Once the MAL metric indicates a scene's lighting is stable, the camera's auto-exposure operation may be suppressed. As long as incoming frames indicate a stable lighting condition (based on the MAL metric), auto-exposure operation may remain suppressed. When incoming frames result in a substantially different MAL over a specified number of frames, auto-exposure operation may be restored.
摘要翻译： 场景感知自动曝光控制过程可稳定照相机自动曝光设置的变化，以减少图像拍摄过程中的照明和颜色闪烁。 被称为修正调整亮度（MAL）度量的度量被定义为保持相对恒定，只要被捕获的场景的照明保持相对恒定。 因此，诸如移动到场景中的，离开或在场景中的对象的场景改变不会显着影响MAL度量的值，因此不会触发曝光调整。 一旦MAL指标表明场景的照明是稳定的，则可能会抑制相机的自动曝光操作。 只要进入的帧指示稳定的照明条件（基于MAL度量），自动曝光操作可能仍然被抑制。 当输入帧在指定数量的帧上导致基本上不同的MAL时，可以恢复自动曝光操作。
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13.发明申请公开(公告)号：US20130223525A1
公开(公告)日：2013-08-29
申请号：US13463547
申请日：2012-05-03
申请人： Xiaosong Zhou , James Oliver Normile , Hsi-Jung Wu
发明人： Xiaosong Zhou , James Oliver Normile , Hsi-Jung Wu
IPC分类号： H04N7/32
CPC分类号： H04N19/97 , H04N19/103 , H04N19/105 , H04N19/176 , H04N19/20
摘要： In a video coding system, an encoder may include a coding engine to predictively code input video, a decoder to reconstruct reference pictures generated by the coding engine, a reference picture cache to store the reconstructed reference pictures, a patch cache to store prediction patches generated from other sources, and a prediction search unit to search among the reference picture cache and the patch cache to generate prediction references for use by the coding engine while coding input video. The prediction patches may be assembled from a variety of sources including: predefined image content, reference pictures being evicted from the reference picture cache, image content of prior coding sessions and image data stored by applications on a common terminal where the encoder resides. A decoder may store prediction patches in its own patch cache for synchronous decoding.
摘要翻译： 在视频编码系统中，编码器可以包括用于预测性地编码输入视频的编码引擎，解码器，以重构由编码引擎生成的参考图片，用于存储重构的参考图片的参考图像高速缓存，用于存储生成的预测补丁的补丁高速缓存 以及预测搜索单元，用于在参考图像高速缓存和片段高速缓存之间进行搜索，以生成预测参考，供编码引擎在编码输入视频时使用。 预测补丁可以从各种来源进行组合，包括：预定图像内容，从参考图像缓存中逐出的参考图片，先前编码会话的图像内容以及存储在编码器驻留的公共终端上的应用程序存储的图像数据。 解码器可以将预测补丁存储在其自己的补丁缓存中用于同步解码。
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公开(公告)号：US20120057073A1
公开(公告)日：2012-03-08
申请号：US13292353
申请日：2011-11-09
IPC分类号： H04N5/238
CPC分类号： H04N5/2351
摘要： A scene-aware auto-exposure control process stabilizes changes in a camera's auto-exposure settings so as to reduce lighting and color flicker during image capture operations. A metric, referred to as the Modified Adjusted Luminance (MAL) metric, is defined to remain relatively constant as long as the lighting of the scene being captured remains relatively constant. Thus, scene changes such as an object moving into, out of, or around in a scene do not significantly affect the MAL metric's value and do not, therefore, trigger an exposure adjustment. Once the MAL metric indicates a scene's lighting is stable, the camera's auto-exposure operation may be suppressed. As long as incoming frames indicate a stable lighting condition (based on the MAL metric), auto-exposure operation may remain suppressed. When incoming frames result in a substantially different MAL over a specified number of frames, auto-exposure operation may be restored.
摘要翻译： 场景感知自动曝光控制过程可稳定照相机自动曝光设置的变化，以减少图像拍摄过程中的照明和颜色闪烁。 被称为修正调整亮度（MAL）度量的度量被定义为保持相对恒定，只要被捕获的场景的照明保持相对恒定。 因此，诸如移动到场景中的，离开或在场景中的对象的场景改变不会显着影响MAL度量的值，因此不会触发曝光调整。 一旦MAL指标表明场景的照明是稳定的，则可能会抑制相机的自动曝光操作。 只要进入的帧指示稳定的照明条件（基于MAL度量），自动曝光操作可能仍然被抑制。 当输入帧在指定数量的帧上导致基本上不同的MAL时，可以恢复自动曝光操作。
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公开(公告)号：US5719961A
公开(公告)日：1998-02-17
申请号：US625608
申请日：1996-03-29
申请人： James Oliver Normile , Katherine Shu-wei Wang , Ke-Chiang Chu , Dulce Beatriz Ponceleon , Hsi-Jung Wu
发明人： James Oliver Normile , Katherine Shu-wei Wang , Ke-Chiang Chu , Dulce Beatriz Ponceleon , Hsi-Jung Wu
CPC分类号： H04N19/103 , H04N19/105 , H04N19/107 , H04N19/132 , H04N19/14 , H04N19/176
摘要： A signal processing system determines the characteristic of a signal for encoding or decoding by examining and classifying such signal, and then applies a transformation or inverse transformation to such signal. Depending on classification of the signal, various transforms or inverse transforms are applicable adaptively thereto.
摘要翻译： 信号处理系统通过检查和分类这样的信号来确定用于编码或解码的信号的特性，然后对这样的信号应用变换或逆变换。 根据信号的分类，可以适应性地适用各种变换或逆变换。
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公开(公告)号：US10536726B2
公开(公告)日：2020-01-14
申请号：US13463547
申请日：2012-05-03
申请人： Xiaosong Zhou , James Oliver Normile , Hsi-Jung Wu
发明人： Xiaosong Zhou , James Oliver Normile , Hsi-Jung Wu
IPC分类号： H04N19/103 , H04N19/105 , H04N19/97
摘要： In a video coding system, an encoder may include a coding engine to predictively code input video, a decoder to reconstruct reference pictures generated by the coding engine, a reference picture cache to store the reconstructed reference pictures, a patch cache to store prediction patches generated from other sources, and a prediction search unit to search among the reference picture cache and the patch cache to generate prediction references for use by the coding engine while coding input video. The prediction patches may be assembled from a variety of sources including: predefined image content, reference pictures being evicted from the reference picture cache, image content of prior coding sessions and image data stored by applications on a common terminal where the encoder resides. A decoder may store prediction patches in its own patch cache for synchronous decoding.
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公开(公告)号：US08077256B1
公开(公告)日：2011-12-13
申请号：US12793848
申请日：2010-06-04
IPC分类号： H04N5/238
CPC分类号： H04N5/2351
摘要： A scene-aware auto-exposure control process stabilizes changes in a camera's auto-exposure settings so as to reduce lighting and color flicker during image capture operations. A metric, referred to as the Modified Adjusted Luminance (MAL) metric, is defined to remain relatively constant as long as the lighting of the scene being captured remains relatively constant. Thus, scene changes such as an object moving into, out of, or around in a scene do not significantly affect the MAL metric's value and do not, therefore, trigger an exposure adjustment. Once the MAL metric indicates a scene's lighting is stable, the camera's auto-exposure operation may be suppressed. As long as incoming frames indicate a stable lighting condition (based on the MAL metric), auto-exposure operation may remain suppressed. When incoming frames result in a substantially different MAL over a specified number of frames, auto-exposure operation may be restored.
摘要翻译： 场景感知自动曝光控制过程可稳定照相机自动曝光设置的变化，以减少图像拍摄过程中的照明和颜色闪烁。 被称为修正调整亮度（MAL）度量的度量被定义为保持相对恒定，只要被捕获的场景的照明保持相对恒定。 因此，诸如移动到场景中的，离开或在场景中的对象的场景改变不会显着影响MAL度量的值，因此不会触发曝光调整。 一旦MAL指标表明场景的照明是稳定的，则可能会抑制相机的自动曝光操作。 只要进入的帧指示稳定的照明条件（基于MAL度量），自动曝光操作可能仍然被抑制。 当输入帧在指定数量的帧上导致基本上不同的MAL时，可以恢复自动曝光操作。
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公开(公告)号：US08175260B2
公开(公告)日：2012-05-08
申请号：US11745568
申请日：2007-05-08
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A method, apparatus, system, and signal-bearing medium that in an embodiment determine a degree of correlation between a speaker output signal and a microphone input signal and modulate an adaptive gain of an acoustic echo canceller based on the degree of correlation.
摘要翻译： 一种方法，装置，系统和信号承载介质，其在一个实施例中确定扬声器输出信号和麦克风输入信号之间的相关程度，并且基于相关度调制声学回声消除器的自适应增益。
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19.发明授权Pre-processing method and system for data reduction of video sequences and bit rate reduction of compressed video sequences using spatial filtering 有权使用空间滤波的视频序列数据缩减和压缩视频序列比特率降低的预处理方法和系统公开(公告)号：US07809207B2
公开(公告)日：2010-10-05
申请号：US12185777
申请日：2008-08-04
CPC分类号： H04N19/117 , G06K9/00234 , H04N5/21 , H04N9/8042 , H04N19/136 , H04N19/14 , H04N19/17 , H04N19/186 , H04N19/192 , H04N19/80
摘要： Methods for pre-processing video sequences prior to compression to provide data reduction of the video sequence. Also, after compression of the pre-processed video sequence, the bit rate of the pre-processed and compressed video sequence will be lower than the bit rate of the video sequence after compression but without pre-processing. Pre-processing may include spatial anisotropic diffusion filtering such as Perona-Malik filtering, Fallah-Ford filtering, or omni-directional filtering that extends Perona-Malik filtering to perform filtering in at least one diagonal direction. Pre-processing may also include performing filtering differently on a foreground region than on a background region of a video frame. This method includes identifying pixel locations having pixel values matching characteristics of human skin and determining a bounding shape for each contiguous grouping of matching pixel locations. The foreground region is comprised of pixel locations contained in a bounding shape and the background region is comprised of all other pixel locations.
摘要翻译： 用于在压缩之前预处理视频序列以提供视频序列的数据缩减的方法。 此外，在经过预处理的视频序列的压缩之后，预处理和压缩的视频序列的比特率将低于压缩后的视频序列的比特率，但是没有预处理。 预处理可以包括空间各向异性扩散滤波，例如Perona-Malik滤波，Fallah-Ford滤波或全向滤波，其延伸Perona-Malik滤波以在至少一个对角线方向上执行滤波。 预处理还可以包括在前景区域上比在视频帧的背景区域上执行不同的滤波。 该方法包括识别具有与人皮肤特征相匹配的像素值的像素位置，并确定匹配像素位置的每个连续分组的边界形状。 前景区域由包含在边界形状中的像素位置组成，并且背景区域由所有其它像素位置组成。
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公开(公告)号：US20080284904A1
公开(公告)日：2008-11-20
申请号：US12107072
申请日：2008-04-21
IPC分类号： H04N11/02
CPC分类号： H04N19/117 , G06K9/00234 , H04N5/21 , H04N9/8042 , H04N19/136 , H04N19/14 , H04N19/17 , H04N19/186 , H04N19/192 , H04N19/80
摘要： Methods for pre-processing video sequences prior to compression to provide data reduction of the video sequence. Also, after compression of the pre-processed video sequence, the bit rate of the pre-processed and compressed video sequence will be lower than the bit rate of the video sequence after compression but without pre-processing. Pre-processing may include spatial anisotropic diffusion filtering such as Perona-Malik filtering, Fallah-Ford filtering, or omni-directional filtering that extends Perona-Malik filtering to perform filtering in at least one diagonal direction. Pre-processing may also include performing filtering differently on a foreground region than on a background region of a video frame. This method includes identifying pixel locations having pixel values matching characteristics of human skin and determining a bounding shape for each contiguous grouping of matching pixel locations. The foreground region is comprised of pixel locations contained in a bounding shape and the background region is comprised of all other pixel locations.
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