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91. 发明授权

US09736335B2 Techniques for advanced chroma processing 有权
公开(公告)号：US09736335B2
公开(公告)日：2017-08-15
申请号：US14875432
申请日：2015-10-05
申请人： Apple Inc.
发明人： Alexandros Michael Tourapis , Yeping Su , David William Singer , Hsi-Jung Wu
IPC分类号： H04N1/60 , H04N9/67 , H04N19/46 , H04N19/186 , H04N19/85
CPC分类号： H04N1/6005 , H04N1/6058 , H04N9/67 , H04N19/186 , H04N19/46 , H04N19/85
摘要： Image and video processing techniques are disclosed for processing components of a color space individually by determining limits for each component based on the relationship between each component in a color space. These limits may then be used to clip each component such that the component values are within the determined range for that component. In this manner, more efficient processing of images and/or video may be achieved.

92. 发明授权

US09706201B2 Region-based processing of predicted pixels 有权
公开(公告)号：US09706201B2
公开(公告)日：2017-07-11
申请号：US14723264
申请日：2015-05-27
申请人： Apple Inc.
发明人： Thomas Pun , Paul Chang , Hsi-Jung Wu
IPC分类号： H04N19/105 , H04N19/182 , H04N19/52 , H04N19/176 , H04N19/46 , H04N19/134 , H04N19/102 , H04N19/61 , H04N19/157 , H04N19/44 , H04N19/436
CPC分类号： H04N19/105 , H04N19/102 , H04N19/134 , H04N19/157 , H04N19/176 , H04N19/182 , H04N19/436 , H04N19/44 , H04N19/46 , H04N19/52 , H04N19/61
摘要： A method for decoding a compressed video data sequence containing one or more coded pixel blocks. The compressed video sequence is buffered. Prediction information for each of the coded pixel blocks is reviewed. One or more groups of coded pixel blocks are formed based on the reviewed prediction information such that the coded pixel blocks within a given group have similar prediction dependencies and/or at least do not depend on a reconstructed pixel within a group of received pixel blocks to enable parallel decoding. The formed groups are scheduled for processing and subsequently decoded to produce a decoded video data sequence.

93. 发明授权

US09565404B2 Encoding techniques for banding reduction 有权
标题翻译：用于条带缩减的编码技术
公开(公告)号：US09565404B2
公开(公告)日：2017-02-07
申请号：US13707404
申请日：2012-12-06
申请人： Apple Inc.
发明人： Yeping Su , Hsi-Jung Wu , Hao Pan
IPC分类号： H04N7/26 , H04N19/10 , H04N19/117 , H04N19/463 , H04N19/14 , H04N19/17 , H04N19/80 , H04N19/176 , H04N19/61 , H04N19/577
CPC分类号： H04N19/10 , H04N19/117 , H04N19/14 , H04N19/17 , H04N19/176 , H04N19/463 , H04N19/577 , H04N19/61 , H04N19/80
摘要： Video encoders often produce banding artifacts on areas with smooth gradients and low levels of detail/noise. In this disclosure, a video encoding system identifies the banded areas and adjusts coding parameters accordingly. The video coder may include a pre-coding banding detector and a post-coding banding detector. The pre-coding detector may identify regions in the input picture with smooth gradients that are likely to have banding artifacts after encoding. The post-coding detector may identify regions in the reconstructed picture with visible banding. Usage of pre-coding detector and/or post-coding detector depends on how an encoder operates. In a single-pass encoding or during the first pass of a multi-pass encoding, the pre-coding detection maps are used. During picture re-encoding or during later passes of a multi-pass encoding, the post-coding detector maps are used.
摘要翻译：视频编码器经常在平滑梯度和低细节/噪音水平的区域产生带状伪影。在本公开中，视频编码系统识别带状区域并相应地调整编码参数。视频编码器可以包括预编码带状检测器和后编码条带检测器。预编码检测器可以在编码后可能具有可能具有带状伪影的平滑梯度来识别输入图像中的区域。后编码检测器可以用可见条带识别重建图像中的区域。预编码检测器和/或后编码检测器的使用取决于编码器如何工作。在单遍编码中或在多遍编码的第一遍期间，使用预编码检测图。在图像重新编码期间或在多遍编码的稍后通过期间，使用后编码检测器图。

94. 发明申请

US20160360230A1 VIDEO CODING TECHNIQUES FOR HIGH QUALITY CODING OF LOW MOTION CONTENT 审中-公开
标题翻译：用于低运动内容高品质编码的视频编码技术
公开(公告)号：US20160360230A1
公开(公告)日：2016-12-08
申请号：US14730975
申请日：2015-06-04
申请人： Apple Inc.
发明人： Peikang Song , Jae Hoon Kim , Xiaosong Zhou , Chris Y. Chung , Hsi-Jung Wu , Dazhong Zhang
IPC分类号： H04N19/53 , H04N19/31 , H04N19/137 , H04N19/85 , H04N19/70 , H04N19/117
摘要： Techniques for coding video data are described that maintain high precision coding for low motion video content. Such techniques include determining whether a source video sequence to be coded has low motion content. When the source video sequence contains low motion content, the video sequence may be coded as a plurality of coded frames using a chain of temporal prediction references among the coded frames. Thus, a single frame in the source video sequence is coded as a plurality of frames. Because the coded frames each represent identical content, the quality of coding should improve across the plurality of frames. Optionally, the disclosed techniques may increase the resolution at which video is coded to improve precision and coding quality.
摘要翻译：描述了用于对视频数据进行编码的技术，其维持低运动视频内容的高精度编码。这样的技术包括确定要编码的源视频序列是否具有低运动内容。当源视频序列包含低运动内容时，视频序列可以使用编码帧中的时间预测参考链来编码为多个编码帧。因此，源视频序列中的单个帧被编码为多个帧。由于编码帧各自表示相同的内容，所以编码的质量应该跨越多个帧而改善。可选地，所公开的技术可以增加视频被编码的分辨率，以提高精度和编码质量。

95. 发明申请

US20160353057A1 TECHNIQUES TO OVERCOME COMMUNICATION LAG BETWEEN TERMINALS PERFORMING VIDEO MIRRORING AND ANNOTATION OPERATIONS 有权
标题翻译：实现视频镜像和报警操作的终端之间通过通信标签的技术
公开(公告)号：US20160353057A1
公开(公告)日：2016-12-01
申请号：US14727471
申请日：2015-06-01
申请人： Apple Inc.
发明人： Chris Y. Chung , Dazhong Zhang , Hsi-Jung Wu , Xiaosong Zhou
IPC分类号： H04N7/14 , H04L29/06 , G06F17/24 , H04N7/15
CPC分类号： H04N7/147 , G06F17/241 , H04L65/403 , H04L65/601 , H04N5/147 , H04N7/155 , H04N21/242 , H04N21/4307
摘要： Techniques are disclosed for overcoming communication lag between interactive operations among devices in a streaming session. According to the techniques, a first device streaming video content to a second device and an annotation is entered to a first frame being displayed at the second device, which is communicated back to the first device. Responsive to a communication that identifies the annotation, a first device may identify an element of video content from the first frame to which the annotation applies and determine whether the identified element is present in a second frame of video content currently displayed at the first terminal. If so, the first device may display the annotation with the second frame in a location where the identified element is present. If not, the first device may display the annotation via an alternate technique.
摘要翻译：公开了用于克服流传输会话中的设备之间的交互操作之间的通信滞后的技术。根据该技术，将视频内容流传输到第二设备和注释的第一设备被输入到被显示在第二设备上的第一帧，该第一帧被传送回到第一设备。响应于识别注释的通信，第一设备可以从应用注释的第一帧识别视频内容的元素，并且确定所识别的元素是否存在于当前在第一终端显示的视频内容的第二帧中。如果是，则第一设备可以在所存在的元素的位置中显示具有第二帧的注释。如果不是，则第一设备可以经由替代技术来显示注释。

96. 发明授权

US09451288B2 Inferred key frames for fast initiation of video coding sessions 有权
标题翻译：用于快速启动视频编码会话的推断关键帧
公开(公告)号：US09451288B2
公开(公告)日：2016-09-20
申请号：US13631793
申请日：2012-09-28
申请人： Apple Inc.
发明人： Hsi-Jung Wu , Xiaosong Zhou
IPC分类号： H04N7/12 , H04N19/65 , H04N19/105 , H04N19/172 , H04N19/107
CPC分类号： H04N19/65 , H04N19/105 , H04N19/107 , H04N19/172
摘要： A video coding system may initiate coding of a new coding session with reference to an “inferred key frame” that is known both to an encoder and a decoder before a coding session begins. The inferred key frame need not be transmitted between the encoder and decoder via the channel. Instead, the inferred key frame may be stored locally at the encoder and the decoder. Frames coded at the onset of a video coding session may be coded with reference to the inferred key frame, which increases the likelihood a decoder will receive a frame it can decode properly and accelerate the rate at which the decoder generates recovered video data. Inferred key frames may be used as prediction references to recover from transmission errors.
摘要翻译：参考在编码会话开始之前编码器和解码器已知的“推断的关键帧”，视频编码系统可以启动对新编码会话的编码。所推断的关键帧不需要经由信道在编码器和解码器之间传输。相反，所推断的关键帧可以本地存储在编码器和解码器处。可以参考推断的关键帧来对视频编码会话开始时编码的帧进行编码，这增加了解码器可以正确接收到帧的可能性，并且加速了解码器产生恢复的视频数据的速率。可以将推断的关键帧用作从传输错误中恢复的预测参考。

97. 发明申请

US20160269733A1 Adaptive Chroma Downsampling and Color Space Conversion Techniques 审中-公开
标题翻译：自适应色度下采样和色空间转换技术
公开(公告)号：US20160269733A1
公开(公告)日：2016-09-15
申请号：US15066992
申请日：2016-03-10
申请人： Apple Inc.
发明人： Alexandros Michael Tourapis , Yeping Su , David William Singer , Hsi-Jung Wu
IPC分类号： H04N19/186 , H04N19/44 , H04N19/117
CPC分类号： H04N19/186 , H04N9/64 , H04N9/67 , H04N11/20 , H04N19/117 , H04N19/132 , H04N19/147 , H04N19/154 , H04N19/189 , H04N19/44 , H04N19/46 , H04N19/59 , H04N19/70 , H04N19/80 , H04N19/82 , H04N19/85
摘要： A method of adaptive chroma downsampling is presented. The method comprises converting a source image to a converted image in an output color format, applying a plurality of downsample filters to the converted image and estimating a distortion for each filter chose the filter that produces the minimum distortion. The distortion estimation includes applying an upsample filter, and a pixel is output based on the chosen filter. Methods for closed loop conversions are also presented.
摘要翻译：提出了一种自适应色度下采样方法。该方法包括将源图像转换为输出颜色格式的转换图像，将多个下采样滤波器应用于转换的图像，并估计每个滤波器的失真选择产生最小失真的滤波器。失真估计包括应用上采样滤波器，并且基于所选择的滤波器输出像素。还提出了闭环转换的方法。

98. 发明申请

US20160073106A1 TECHNIQUES FOR ADAPTIVE VIDEO STREAMING 审中-公开
标题翻译：适应性视频流的技术
公开(公告)号：US20160073106A1
公开(公告)日：2016-03-10
申请号：US14703366
申请日：2015-05-04
申请人： Apple Inc.
发明人： Yeping Su , Hsi-Jung Wu , Ke Zhang , Chris Y. Chung , Xiaosong Zhou
IPC分类号： H04N19/10
CPC分类号： H04N19/10 , H04N21/234363 , H04N21/23439 , H04N21/23805 , H04N21/8456 , H04N21/8543
摘要： In a video coding system, a common video sequence is coded multiple times to yield respective instances of coded video data. Each instance may be coded according to a set coding parameters derived from a target bit rate of a respective tier of service. Each tier may be coded according to a constraint that limits a maximum coding rate of the tier to be less than a target bit rate of another predetermined tier of service. Having been coded according to the constraint facilitates dynamic switching among tiers by a requesting client device processing resources or communication bandwidth changes. Improved coding systems to switch among different coding streams may increase quality of video streamed while minimizing transmission and storage size of such content.
摘要翻译：在视频编码系统中，公共视频序列被多次编码以产生编码视频数据的各个实例。每个实例可以根据从相应服务等级的目标比特率导出的集合编码参数进行编码。每个层可以根据将该层的最大编码率限制为小于另一预定服务层的目标比特率的约束进行编码。已经根据约束进行编码有助于请求客户端设备处理资源或通信带宽变化的层之间的动态切换。改进的在不同编码流之间切换的编码系统可以提高视频流的质量，同时最小化这些内容的传输和存储大小。

99. 发明授权

US09215655B2 Radio power saving techniques for video conference applications 有权
标题翻译：视频会议应用的无线电节能技术
公开(公告)号：US09215655B2
公开(公告)日：2015-12-15
申请号：US14465584
申请日：2014-08-21
申请人： Apple Inc.
发明人： Chris Y. Chung , Wen Zhao , Luciano M. Verger , Hyeonkuk Jeong , Gang Lu , Srinivasan Vasudevan , Xiaosong Zhou , Hsi-Jung Wu , James O. Normile
IPC分类号： H04W52/02 , H04N7/15
CPC分类号： H04N7/15 , H04L12/1827 , H04L65/1069 , H04N5/23241 , H04N5/372 , H04W52/02 , H04W52/0209 , H04W52/0216 , Y02D70/00 , Y02D70/1224 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/168 , Y02D70/24
摘要： In video conferencing over a radio network, the radio equipment is a major power consumer especially in cellular networks such as LTE. In order to reduce the radio power consumption in video conferencing, it is important to introduce an enough radio inactive time. Several types of data buffering and bundling can be employed within a reasonable range of latency that doesn't significantly disrupt the real-time nature of video conferencing. In addition, the data transmission can be synchronized to the data reception in a controlled manner, which can result in an even longer radio inactive time and thus take advantage of radio power saving modes such as LTE C-DRX.
摘要翻译：在无线电网络的视频会议中，无线电设备是主要的电力消费者，特别是在诸如LTE的蜂窝网络中。为了降低视频会议中的无线电功耗，重要的是要引入足够的无线电时间。几种类型的数据缓冲和捆绑可以在合理的延迟范围内使用，不会显着破坏视频会议的实时性质。此外，可以以受控的方式将数据传输同步到数据接收，这可以导致更长的无线电时间，从而利用诸如LTE C-DRX之类的无线电节能模式。

100. 发明申请

US20150350641A1 DYNAMIC RANGE ADAPTIVE VIDEO CODING SYSTEM 审中-公开
标题翻译：动态范围自适应视频编码系统
公开(公告)号：US20150350641A1
公开(公告)日：2015-12-03
申请号：US14636839
申请日：2015-03-03
申请人： Apple Inc.
发明人： Xiaosong Zhou , Jiefu Zhai , Yeping Su , Chris Y. Chung , Hsi-Jung Wu
IPC分类号： H04N19/105 , H04N19/159 , H04N19/13 , H04N19/176 , H04N19/18 , H04N19/119 , H04N19/167
CPC分类号： H04N19/105 , H04N19/119 , H04N19/13 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/18 , H04N19/85 , H04N19/98
摘要： A video coding/decoding system codes data efficiently even when input video data exhibits changes in dynamic range. The system may map pixel values of the first frame from a dynamic range specific to the input image data to a second dynamic range that applies universally to a plurality of frames that have different dynamic ranges defined for them. The system may code the mapped pixel values to reduce bandwidth of the mapped frame data, and thereafter transmit the coded image data to a channel.
摘要翻译：视频编码/解码系统即使在输入视频数据表现出动态范围的变化时，也能有效地对数据进行编该系统可将来自特定于输入图像数据的动态范围的第一帧的像素值映射到通常适用于为它们定义的不同动态范围的多个帧的第二动态范围。系统可以对映射的像素值进行编码以减少映射的帧数据的带宽，然后将编码的图像数据发送到信道。

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