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61. 发明申请

US20070116126A1 Multipass video encoding and rate control using subsampling of frames 有权
标题翻译：多帧视频编码和速率控制采用子采样帧
公开(公告)号：US20070116126A1
公开(公告)日：2007-05-24
申请号：US11384379
申请日：2006-03-21
申请人： Barin Haskell , Adriana Dumitras , Hsi-Jung Wu , Xin Tong , Thomas Pun
发明人： Barin Haskell , Adriana Dumitras , Hsi-Jung Wu , Xin Tong , Thomas Pun
IPC分类号： H04N11/02 , H04N7/12
CPC分类号： H04N19/587 , H04N19/115 , H04N19/132 , H04N19/15 , H04N19/194 , H04N19/196
摘要： An encoder includes an encoder engine, a storage device and a controller to implement an iterative coding process. The encoder engine compresses a selected portion of a data sequence. The storage device stores the compressed portion of the data sequence after each iteration. The controller selects the portion of the data sequence to compress for each iteration. The controller gathers statistics from the compressed portion of the data sequence. The gathered statistics include statistics generated by the selected frames and statistics extrapolated from the selected frames for the non-selected frames. The controller adjusts coding parameters of the encoder engine on each iteration until the gathered statistics meet a specified performance requirement.
摘要翻译：编码器包括编码器引擎，存储装置和控制器，以实现迭代编码处理。编码器引擎压缩数据序列的选定部分。存储装置在每次迭代之后存储数据序列的压缩部分。控制器为每次迭代选择数据序列的部分进行压缩。控制器从数据序列的压缩部分收集统计信息。所收集的统计信息包括由所选择的帧生成的统计信息和对于未选择的帧从所选择的帧中推断的统计信息。控制器在每次迭代中调整编码器引擎的编码参数，直到收集到的统计信息达到规定的性能要求。

62. 发明申请

US20050286631A1 Encoding with visual masking 有权
标题翻译：用视觉遮蔽编码
公开(公告)号：US20050286631A1
公开(公告)日：2005-12-29
申请号：US11118604
申请日：2005-04-28
申请人： Hsi Jung Wu , Thomas Pun
发明人： Hsi Jung Wu , Thomas Pun
IPC分类号： H04B1/66 , H04N5/14 , H04N7/12 , H04N7/26 , H04N7/50 , H04N9/64 , H04N11/02 , H04N11/04
CPC分类号： H04N19/192 , H04N19/124 , H04N19/137 , H04N19/14 , H04N19/15 , H04N19/172 , H04N19/176 , H04N19/61
摘要： Some embodiments of the invention encode a sequence of video images based on “visual masking” attributes of the video images and/or portions of the video images. Visual masking of an image or a portion of the image is an indication of how much coding artifacts can be tolerated in the image or image portion. To express the visual masking attribute of an image or an image portion, some embodiments compute a visual masking strength that quantifies the brightness energy of the image or the image portion. In some embodiments, the brightness energy is measured as a function of the average luma or pixel energy of the image or image portion.
摘要翻译：本发明的一些实施例基于视频图像和/或视频图像的部分的“视觉掩蔽”属性来编码视频图像序列。图像或图像的一部分的视觉遮蔽是图像或图像部分中可以容许多少编码伪像的指示。为了表达图像或图像部分的视觉掩蔽属性，一些实施例计算量化图像或图像部分的亮度能量的视觉掩蔽强度。在一些实施例中，根据图像或图像部分的平均亮度或像素能量来测量亮度能量。

63. 发明申请

US20050286635A1 Pruning during video encoding 有权
标题翻译：视频编码时修剪
公开(公告)号：US20050286635A1
公开(公告)日：2005-12-29
申请号：US11119428
申请日：2005-04-28
申请人： Roger Kumar , Thomas Pun , Hsi Wu
发明人： Roger Kumar , Thomas Pun , Hsi Wu
IPC分类号： H04B1/66 , H04N7/12 , H04N7/26 , H04N7/50 , H04N11/02 , H04N11/04
CPC分类号： H04N19/00151 , H04N19/107 , H04N19/109 , H04N19/11 , H04N19/119 , H04N19/132 , H04N19/137 , H04N19/139 , H04N19/147 , H04N19/176 , H04N19/186 , H04N19/196 , H04N19/197 , H04N19/513 , H04N19/61
摘要： Some embodiments provide a method for encoding a first set of pixels in a first image in a sequence of images. From a set of encoding modes, the method of some embodiments selects a first mode for encoding the first set of pixels. The method then determines whether encoding the first set of pixels in the first mode satisfies a set of quality criteria. The method foregoes encoding the first set of pixels in a second mode from the set of encoding modes, when the first mode encoding satisfies the set of quality criteria. Some embodiments provide a video encoding method that examines several different methods for encoding a set of pixels in a first image. From a list of possible encoding modes, the method eliminates a set of encoding modes that are not likely to provide a suitable encoding solution. The method then examines different encoding solutions based on the remaining encoding modes in the list.
摘要翻译：一些实施例提供了一种用于对图像序列中的第一图像中的第一组像素进行编码的方法。从一组编码模式中，一些实施例的方法选择用于对第一组像素进行编码的第一模式。该方法然后确定在第一模式中对第一组像素进行编码是否满足一组质量标准。当第一模式编码满足质量标准的集合时，该方法放弃在编码模式集合中以第二模式编码第一组像素。一些实施例提供一种视频编码方法，其检查用于对第一图像中的一组像素进行编码的几种不同的方法。从可能的编码模式的列表中，该方法消除了不可能提供合适的编码解决方案的一组编码模式。然后，该方法基于列表中的剩余编码模式来检查不同的编码方案。

64. 发明申请

US20050286777A1 Encoding and decoding images 审中-公开
标题翻译：图像编码和解码
公开(公告)号：US20050286777A1
公开(公告)日：2005-12-29
申请号：US11119414
申请日：2005-04-28
申请人： Roger Kumar , Thomas Pun , Hsi Wu , Christian Duvivier
发明人： Roger Kumar , Thomas Pun , Hsi Wu , Christian Duvivier
IPC分类号： H04N7/26 , H04N7/50 , G06K9/36
CPC分类号： G06F12/0802 , H04N19/00 , H04N19/105 , H04N19/107 , H04N19/119 , H04N19/147 , H04N19/176 , H04N19/19 , H04N19/192 , H04N19/43 , H04N19/51 , H04N19/523 , H04N19/53 , H04N19/533 , H04N19/61
摘要： Some embodiments provide a method for encoding a first set of pixels in a first image by reference to a second image in a video sequence. In a first search window within a second image, the method searches to identify a first particular portion in the second image that best matches the first set of pixels in the first image. In the first search window within the second image, the method identifies a first location corresponding to the first particular portion. In a second search window within the second image, the method then searches to identify a second particular portion in the second image that best matches the first set of pixels in the first image, where the second search window is defined about the first location.
摘要翻译：一些实施例提供了一种通过参考视频序列中的第二图像对第一图像中的第一组像素进行编码的方法。在第二图像内的第一搜索窗口中，该方法搜索以识别与第一图像中的第一组像素最佳匹配的第二图像中的第一特定部分。在第二图像内的第一搜索窗口中，该方法识别对应于第一特定部分的第一位置。在第二图像内的第二搜索窗口中，该方法然后搜索以识别与第一图像中的第一组像素最佳匹配的第二图像中的第二特定部分，其中关于第一位置定义第二搜索窗口。

65. 发明申请

US20060244819A1 Video encoding in a video conference 有权
公开(公告)号：US20060244819A1
公开(公告)日：2006-11-02
申请号：US11118615
申请日：2005-04-28
申请人： Thomas Pun , Hsi Wu , Hyeonkuk Jeong
发明人： Thomas Pun , Hsi Wu , Hyeonkuk Jeong
IPC分类号： H04N7/14
CPC分类号： H04N7/15
摘要： Some embodiments provide an architecture for establishing multi-participant video conferences. This architecture has a central distributor that receives video images from two or more participants. From the received images, the central distributor generates composite images that the central distributor transmits back to the participants. Each composite image includes a set of sub images, where each sub image belongs to one participant. In some embodiments, the central distributor saves network bandwidth by removing each particular participant's image from the composite image that the central distributor sends to the particular participant. In some embodiments, images received from each participant are arranged in the composite in a non-interleaved manner. For instance, in some embodiments, the composite image includes at most one sub-image for each participant, and no two sub-images are interleaved.

66. 发明申请

US20060245492A1 Single pass rate controller 有权
标题翻译：单通速率控制器
公开(公告)号：US20060245492A1
公开(公告)日：2006-11-02
申请号：US11118618
申请日：2005-04-28
申请人： Thomas Pun , Hsi Wu , Adriana Dumitras
发明人： Thomas Pun , Hsi Wu , Adriana Dumitras
IPC分类号： H04N11/04 , H04B1/66 , H04N7/12 , H04N11/02
CPC分类号： H04N19/142 , H04N19/115 , H04N19/124 , H04N19/15 , H04N19/159 , H04N19/172
摘要： Some embodiments of the invention provide a method for specifying a bit allocation for encoding a set of images in a sequence of video images. The method computes a masking value for one or more images. The method computes a bit allocation for a current image based on the computed masking value of one or more images. In some embodiments, the method further ascertains a total number of bits used for images that have been already encoded before computing the bit allocation. The computed bit allocation for the current image is also based on the total number of bits used in some embodiments of the invention. In some embodiments, the method specifies a bit allocation for the current image by specifying a quantization parameter (QP) value for the current image. The method then adjusts the specified QP value based on a categorization of the current image. Examples of such categorizations include: (1) category 1 images, which are images at natural scene changes or images that collectively capture a fast motion, (2) category 2 images, which are imaged forced to be intrablock encoded and are not category 1 images, (3) category 3 images, which are images that should be easy to encode, (4) category 4 images, which are images at the transition between simple and difficult images, and (5) category 5 images, which are images that do not fall in the other categories. In some embodiments, the sequence of frames is divided into a set of blocks, where each block has (1) a size and (2) a bit allocation. Some embodiments dynamically adjust the size of the blocks during the encoding operation. In some embodiments, unused bits allocated to a first block are rolled over to a second block. In other embodiments, only some of the unused bits are rolled over to the second block.
摘要翻译：本发明的一些实施例提供了一种用于指定用于对视频图像序列中的一组图像进行编码的比特分配的方法。该方法计算一个或多个图像的掩蔽值。该方法基于所计算的一个或多个图像的屏蔽值来计算当前图像的位分配。在一些实施例中，该方法进一步确定在计算比特分配之前已经被编码的图像的总位数。所计算的当前图像的比特分配也基于在本发明的一些实施例中使用的总比特数。在一些实施例中，该方法通过指定当前图像的量化参数（QP）值来指定当前图像的比特分配。然后，该方法基于当前图像的分类来调整指定的QP值。这种分类的例子包括：（1）第1类图像，它们是自然场景变化中的图像或共同捕捉快速运动的图像，（2）被强制为嵌入式编码的图像的2类图像，不是1类图像，（3）第3类图像，这些图像应该易于编码，（4）4类图像，即简单和困难图像之间转换的图像，以及（5）第5类图像，即图像不属于其他类别。在一些实施例中，帧的序列被划分成一组块，其中每个块具有（1）大小和（2）比特分配。一些实施例在编码操作期间动态调整块的大小。在一些实施例中，分配给第一块的未使用位被转移到第二块。在其他实施例中，仅将一些未使用的位滚动到第二块。

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