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1. 发明申请

US20090304077A1 REFRESH METHOD AND APPARATUS 有权
标题翻译：刷新方法和装置
公开(公告)号：US20090304077A1
公开(公告)日：2009-12-10
申请号：US12415478
申请日：2009-03-31
申请人： Hsi-Jung WU , Xiaosong ZHOU , Xiaojin SHI , Yuxin LIU
发明人： Hsi-Jung WU , Xiaosong ZHOU , Xiaojin SHI , Yuxin LIU
IPC分类号： H04N7/32 , H04N7/26
CPC分类号： H04N7/26031 , H04N7/5086 , H04N19/107 , H04N19/137 , H04N19/176 , H04N19/61
摘要： Apparatuses and methods for improving coding processes and coding parameters for coding video data are provided for. A coder may select coding parameters for video data according to a default coding policy. The default coding policy may include selection of prediction modes (e.g., intra-coding or inter-coding) for each pixel group in each frame. A video coder may select some pixel groups in a frame to be coded as refresh pixel groups as an exception to the default assignment policies. The selection of refresh pixel groups may be based on prediction relationships among multiple frames of source video data. The default coding of the refresh pixel groups is then modified to enhanced the coding of the refresh pixel groups. The refresh pixel groups may permit fewer intra (I) frames be sent and/or may improve the quality of the recovered video.
摘要翻译：提供了用于改进用于编码视频数据的编码处理和编码参数的装置和方法。编码器可以根据默认编码策略选择视频数据的编码参数。默认编码策略可以包括对每个帧中的每个像素组的预测模式（例如，帧内编码或帧间编码）的选择。视频编码器可以将要编码的帧中的一些像素组选择为刷新像素组，作为默认分配策略的例外。刷新像素组的选择可以基于源视频数据的多个帧之间的预测关系。然后修改刷新像素组的默认编码以增强刷新像素组的编码。刷新像素组可以允许更少的帧内（I）帧被发送和/或可以提高恢复的视频的质量。

2. 发明申请

US20110235709A1 FRAME DROPPING ALGORITHM FOR FAST ADAPTATION OF BUFFERED COMPRESSED VIDEO TO NETWORK CONDITION CHANGES 审中-公开
标题翻译：用于快速适应缓存压缩视频到网络条件变化的帧丢弃算法
公开(公告)号：US20110235709A1
公开(公告)日：2011-09-29
申请号：US12756100
申请日：2010-04-07
申请人： Xiaojin SHI , Xiaosong ZHOU , Joe ABUAN , Hyeonkuk JEONG , Jochen Christian SCHMIDT , Yan YANG , James Oliver NORMILE , Hsi-Jung WU
发明人： Xiaojin SHI , Xiaosong ZHOU , Joe ABUAN , Hyeonkuk JEONG , Jochen Christian SCHMIDT , Yan YANG , James Oliver NORMILE , Hsi-Jung WU
IPC分类号： H04N7/26 , H04N7/32
CPC分类号： H04N21/64723 , H04N19/105 , H04N19/12 , H04N19/132 , H04N19/152 , H04N19/159 , H04N19/164 , H04N19/174 , H04N19/187 , H04N19/30 , H04N19/37 , H04N19/577 , H04N19/59 , H04N21/64761
摘要： A video coding and transmission system may employ techniques for adapting buffered video to network condition changes. Video data may be coded as reference data and non-reference data. According to the embodiments, non-reference frame may be detected in buffered video while awaiting transmission to a network. When network degradation is detected, one or more of the buffered non-reference frames may be dropped when network degradation is detected. Information about the dropped frames may be passed to an encoder for updating buffer parameters for future encoding. In this manner, a video coding system may provide faster responses to changing network conditions than systems without such buffer management techniques.
摘要翻译：视频编码和传输系统可以采用用于将缓冲的视频适配到网络状况变化的技术。视频数据可以被编码为参考数据和非参考数据。根据实施例，在等待传输到网络的同时，可以在缓冲视频中检测非参考帧。当检测到网络劣化时，当检测到网络劣化时，可能会丢弃一个或多个缓冲的非参考帧。关于丢弃的帧的信息可以被传递到编码器以更新用于将来编码的缓冲器参数。以这种方式，与没有这种缓冲器管理技术的系统相比，视频编码系统可以对改变的网络条件提供更快的响应。

3. 发明申请

US20110038416A1 VIDEO CODER PROVIDING IMPROVED VISUAL QUALITY DURING USE OF HETEROGENEOUS CODING MODES 审中-公开
标题翻译：视频编码器在使用异构编码模式时提供改进的视觉质量
公开(公告)号：US20110038416A1
公开(公告)日：2011-02-17
申请号：US12541773
申请日：2009-08-14
申请人： Xiaosong ZHOU , Ionut HRISTODORESCU , Hsi-Jung WU , Xiaojin SHI
发明人： Xiaosong ZHOU , Ionut HRISTODORESCU , Hsi-Jung WU , Xiaojin SHI
IPC分类号： H04N11/04
CPC分类号： H04N19/194 , H04N19/103 , H04N19/109 , H04N19/11 , H04N19/154 , H04N19/157 , H04N19/176 , H04N19/182 , H04N19/61
摘要： A video coding system reduces perceptible artifacts introduced to coded video due to selection of disparate coding modes among adjacent partitions of video. When coding modes are assigned to partitions of video that likely would introduce visually perceptible coding artifacts during decode, the partitions may be subject to a coding process in which a selected partition is coded according to coding modes that correspond to neighboring partitions, then decoded. The decoded data of the selected partition may be recoded according to a different coding mode. Coding artifacts that otherwise might be introduced by the different coding mode may be avoided by first coding the corresponding partition in a manner that is consistent with neighboring partitions, then decoding the coded partition and re-coding the decoded data according to the different mode. In an embodiment, a quantization parameter may be reduced between a first code and the recode. The coding technique may be applied to partitions of various scales—e.g., to pixel blocks or frames.
摘要翻译：视频编码系统由于在相邻的视频分区之间选择不同的编码模式，减少了引入编码视频的可察觉的伪像。当编码模式被分配给可能在解码期间引入视觉上可感知的编码伪像的视频分区时，分区可以经受编码处理，其中根据与相邻分区对应的编码模式对所选择的分区进行编码，然后进行解码。可以根据不同的编码模式重新编码所选分区的解码数据。可以通过以与相邻分区一致的方式对相应的分区进行编码，然后根据不同的模式对编码的分区进行解码并重新编码解码的数据，可以避免不同的编码模式可能引入的编码人造物。在一个实施例中，可以在第一代码和重新编码之间减少量化参数。编码技术可以应用于各种尺度的分区，例如，应用于像素块或帧。

4. 发明申请

US20100309975A1 IMAGE ACQUISITION AND TRANSCODING SYSTEM 审中-公开
标题翻译：图像采集和扫描系统
公开(公告)号：US20100309975A1
公开(公告)日：2010-12-09
申请号：US12533985
申请日：2009-07-31
申请人： Xiaosong ZHOU , Davide CONCION , Guy COTE , Cecile FORET , Haitao (Harry) GUO , Ionut HRISTODORESCU , James Oliver NORMILE , Xiaojin SHI , Hsi-Jung WU
发明人： Xiaosong ZHOU , Davide CONCION , Guy COTE , Cecile FORET , Haitao (Harry) GUO , Ionut HRISTODORESCU , James Oliver NORMILE , Xiaojin SHI , Hsi-Jung WU
IPC分类号： H04N7/26
CPC分类号： H04N5/772 , H04N5/765 , H04N5/781 , H04N5/85 , H04N9/7921 , H04N9/8042 , H04N9/8205 , H04N19/107 , H04N19/124 , H04N19/139 , H04N19/14 , H04N19/40 , H04N19/46 , H04N19/85
摘要： A method and system are provided to encode a video sequence into a compressed bitstream. An encoder receives a video sequence from an image-capture device, together with metadata associated with the video sequence, and codes the video sequence into a first compressed bitstream using the metadata to select or revise a coding parameter associated with a coding operation. Optionally, the video sequence may be conditioned for coding by a preprocessor, which also may use the metadata to select or revise a preprocessing parameter associated with a preprocessing operation. The encoder may itself generate metadata associated with the first compressed bitstream, which may be used together with any metadata received by the encoder, to transcode the first compressed bitstream into a second compressed bitstream. The compressed bitstreams may be decoded by a decoder to generate recovered video data, and the recovered video data may be conditioned for viewing by a postprocessor, which may use the metadata to select or revise a postprocessing parameter associated with a postprocessing operation.
摘要翻译：提供了将视频序列编码为压缩比特流的方法和系统。编码器从图像捕获装置接收视频序列以及与视频序列相关联的元数据，并且使用元数据将视频序列编码为第一压缩比特流，以选择或修改与编码操作相关联的编码参数。可选地，视频序列可以由预处理器进行调节，预处理器也可以使用元数据来选择或修改与预处理操作相关联的预处理参数。编码器本身可以产生与可与编码器接收的任何元数据一起使用的第一压缩比特流相关联的元数据，以将第一压缩比特流转码为第二压缩比特流。压缩比特流可以由解码器解码以产生恢复的视频数据，并且恢复的视频数据可以被调整为由后处理器进行查看，后处理器可以使用元数据来选择或修改与后处理操作相关联的后处理参数。

5. 发明申请

US20100246688A1 BLIND NOISE ANALYSIS FOR VIDEO COMPRESSION 审中-公开
标题翻译：用于视频压缩的盲点噪声分析
公开(公告)号：US20100246688A1
公开(公告)日：2010-09-30
申请号：US12463871
申请日：2009-05-11
申请人： Gianluca FILIPPINI , Xiaosong ZHOU , Hsi-Jung WU , James Oliver NORMILE , Xiaojin SHI , Ionut HRISTODORESCU
发明人： Gianluca FILIPPINI , Xiaosong ZHOU , Hsi-Jung WU , James Oliver NORMILE , Xiaojin SHI , Ionut HRISTODORESCU
IPC分类号： H04N7/12
CPC分类号： H04N19/176 , H04N19/103 , H04N19/122 , H04N19/124 , H04N19/154 , H04N19/61 , H04N19/91
摘要： Example embodiments of the present invention provide a method or device for coding source video. The method or device may provide for a segment of video frames from the source video, computing a noise map for the segment of the source video where the noise map is computed from differences among pixels selected from spatially-distributed sampling patterns in the segment, computing control parameter adjustments based on the noise map, and coding the selected segment of source video according to control parameters generated from a default coding policy and the control parameter adjustments, where the default coding policy includes default control parameters of the encoder.
摘要翻译：本发明的示例实施例提供了一种用于对源视频进行编码的方法或装置。该方法或装置可以提供来自源视频的一段视频帧，计算源视频段的噪声图，其中根据片段中空间分布的采样模式中选择的像素之间的差异来计算噪声图，计算根据噪声图控制参数调整，以及根据从默认编码策略生成的控制参数和控制参数调整对所选择的源视频段进行编码，其中默认编码策略包括编码器的默认控制参数。

6. 发明申请

US20100008419A1 Hierarchical Bi-Directional P Frames 审中-公开
标题翻译：分层双向P帧
公开(公告)号：US20100008419A1
公开(公告)日：2010-01-14
申请号：US12339735
申请日：2008-12-19
申请人： Hsi-Jung WU , James Oliver NORMILE , Xiaojin SHI , Xiaosong ZHOU , Gianluca FILIPPINI , Ionut HRISTODORESCU
发明人： Hsi-Jung WU , James Oliver NORMILE , Xiaojin SHI , Xiaosong ZHOU , Gianluca FILIPPINI , Ionut HRISTODORESCU
IPC分类号： H04N7/32
CPC分类号： H04N19/105 , H04N19/31 , H04N19/577
摘要： Embodiments of the present invention provide systems, methods and apparatuses for generating forward, backward or bi-directional P frames. Prior to encoding a sequence of video frames, P frames within the video sequence can be reordered to include causal and/or non-causal references to one or more reference frames. This allows any block partition of a bi-directional P frame to include a single reference to a reference frame that is temporally displayed either before or after the bi-directional P frame. Compression and visual quality can therefore be improved. Hierarchical frame structures can be constructed using bi-directional P frames to better accommodate low complexity decoding profiles. Multilayered encoded video bitstreams can be generated based on the hierarchical frame structures and can include a first layer of anchor frames and one or more second layers that include bi-directional P frames that reference the anchor frames and/or any frame in any lower level layer.
摘要翻译：本发明的实施例提供用于产生前向，后向或双向P帧的系统，方法和装置。在对一系列视频帧进行编码之前，视频序列内的P帧可以被重新排序，以包括对一个或多个参考帧的因果和/或非因果引用。这允许双向P帧的任何块分区包括在双向P帧之前或之后临时显示的参考帧的单个引用。因此可以提高压缩和视觉质量。可以使用双向P帧来构建分层帧结构，以更好地适应低复杂度的解码简档。可以基于分级帧结构来生成多层编码视频比特流，并且可以包括第一层锚帧和一个或多个第二层，其包括引用锚帧和/或任何较低级别层中的任何帧的双向P帧。

7. 发明申请

US20110149087A1 Joint Bandwidth Detection Algorithm For Real-Time Communication 有权
标题翻译：用于实时通信的联合带宽检测算法
公开(公告)号：US20110149087A1
公开(公告)日：2011-06-23
申请号：US12646065
申请日：2009-12-23
申请人： Hyeonkuk JEONG , Xiaosong ZHOU , Joe ABUAN , Xiaojin SHI , Hsi-Jung WU , James Oliver NORMILE
发明人： Hyeonkuk JEONG , Xiaosong ZHOU , Joe ABUAN , Xiaojin SHI , Hsi-Jung WU , James Oliver NORMILE
IPC分类号： H04N7/26 , H04N5/225
CPC分类号： H04N7/148 , H04N19/115 , H04N19/166 , H04N19/192 , H04N19/196 , H04N19/197 , H04N19/46
摘要： A video coding system and method for increasing a transmitted output bit rate of a video encoding system by altering the content of the bit stream. A video encoder may receive a coding mode signal from a computer application for coding source video data, the coding mode signal indicating a target bit rate having a risk factor related to transmission error associated to the target bit rate. The coded bitstream may be modified based on the risk factor indicated in the coding mode signal. A modified coded bitstream may be outputted at the target bit rate and at a reduced coding efficiency, and the channel may be tested for transmission errors. Based on the test results, a revised coding mode signal indicating the same target bit rate, but a revised risk factor may be provided. The coded bitstream may be revised by removing the modifications previously made to the coded bitstream and a revised coded bitstream having greater coding efficiency may be output at the target bit rate.
摘要翻译：一种用于通过改变比特流的内容来增加视频编码系统的发送的输出比特率的视频编码系统和方法。视频编码器可以接收来自用于编码源视频数据的计算机应用的编码模式信号，编码模式信号指示具有与目标比特率相关联的传输错误的风险因子的目标比特率。可以基于编码模式信号中指示的危险因素来修改编码比特流。可以以目标比特率和降低的编码效率输出经修改的编码比特流，并且可以测试该信道的传输错误。基于测试结果，可以提供指示相同目标比特率的修订的编码模式信号，但是可以提供经修订的风险因子。可以通过去除先前对编码比特流进行的修改来修改编码比特流，并且可以以目标比特率输出具有较高编码效率的修订编码比特流。

8. 发明申请

US20100309987A1 IMAGE ACQUISITION AND ENCODING SYSTEM 审中-公开
标题翻译：图像采集和编码系统
公开(公告)号：US20100309987A1
公开(公告)日：2010-12-09
申请号：US12533927
申请日：2009-07-31
申请人： Davide CONCION , Xiaosong ZHOU , Guy COTE , Cecile FORET , Haitao (Harry) GUO , Ionut HRISTODORESCU , James Oliver NORMILE , Xiaojin SHI , Hsi-Jung WU
发明人： Davide CONCION , Xiaosong ZHOU , Guy COTE , Cecile FORET , Haitao (Harry) GUO , Ionut HRISTODORESCU , James Oliver NORMILE , Xiaojin SHI , Hsi-Jung WU
IPC分类号： H04N7/26 , H04N7/24
CPC分类号： H04N5/772 , H04N5/765 , H04N5/781 , H04N5/85 , H04N9/7921 , H04N9/8042 , H04N9/8205 , H04N19/107 , H04N19/124 , H04N19/139 , H04N19/14 , H04N19/40 , H04N19/46 , H04N19/85
摘要： A method and system are provided to encode a video sequence into a compressed bitstream. An encoder receives a video sequence from an image-capture device, together with metadata associated with the video sequence, and codes the video sequence into a first compressed bitstream using the metadata to select or revise a coding parameter associated with a coding operation. Optionally, the video sequence may be conditioned for coding by a preprocessor, which also may use the metadata to select or revise a preprocessing parameter associated with a preprocessing operation. The encoder may itself generate metadata associated with the first compressed bitstream, which may be used together with any metadata received by the encoder, to transcode the first compressed bitstream into a second compressed bitstream. The compressed bitstreams may be decoded by a decoder to generate recovered video data, and the recovered video data may be conditioned for viewing by a postprocessor, which may use the metadata to select or revise a postprocessing parameter associated with a postprocessing operation.
摘要翻译：提供了将视频序列编码为压缩比特流的方法和系统。编码器从图像捕获装置接收视频序列以及与视频序列相关联的元数据，并且使用元数据将视频序列编码为第一压缩比特流，以选择或修改与编码操作相关联的编码参数。可选地，视频序列可以由预处理器进行调节，预处理器也可以使用元数据来选择或修改与预处理操作相关联的预处理参数。编码器本身可以产生与可与编码器接收的任何元数据一起使用的第一压缩比特流相关联的元数据，以将第一压缩比特流转码为第二压缩比特流。压缩比特流可以由解码器解码以产生恢复的视频数据，并且恢复的视频数据可以被调整为由后处理器进行查看，后处理器可以使用元数据来选择或修改与后处理操作相关联的后处理参数。

9. 发明申请

US20100246691A1 RESTORE FILTER FOR RESTORING PREPROCESSED VIDEO IMAGE 有权
标题翻译：用于恢复预处理视频图像的恢复过滤器
公开(公告)号：US20100246691A1
公开(公告)日：2010-09-30
申请号：US12463913
申请日：2009-05-11
申请人： Gianluca FILIPPINI , Xiaosong ZHOU , Hsi-Jung WU , James Oliver NORMILE , Xiaojin SHI , Ionut HRISTODORESCU
发明人： Gianluca FILIPPINI , Xiaosong ZHOU , Hsi-Jung WU , James Oliver NORMILE , Xiaojin SHI , Ionut HRISTODORESCU
IPC分类号： H04N7/12
CPC分类号： H04N19/00084 , H04N19/103 , H04N19/122 , H04N19/124 , H04N19/154 , H04N19/176 , H04N19/61 , H04N19/91
摘要： Embodiments of the present invention provides a method and device for processing a source video. The method and device may provide computing an artifact estimation from differences among pixels selected from spatially-distributed sampling patterns in the source video; filtering the source video to produce a filtered version of the source video, computing a blending factor based on the artifact estimation in the source video, and computing an output video by blending the source video and the filtered version of the source video based on the blending factor.
摘要翻译：本发明的实施例提供了一种用于处理源视频的方法和设备。该方法和装置可以提供从源视频中从空间分布的采样模式中选择的像素之间的差异来计算伪像估计; 过滤源视频以产生源视频的过滤版本，基于源视频中的伪像估计来计算混合因子，以及基于混合来混合源视频和源视频的过滤版本来计算输出视频因子。

10. 发明申请

US20100246689A1 DYNAMIC DITHERING FOR VIDEO COMPRESSION 有权
标题翻译：动态压缩视频压缩
公开(公告)号：US20100246689A1
公开(公告)日：2010-09-30
申请号：US12463859
申请日：2009-05-11
申请人： Gianluca FILIPPINI , Hsi-Jung WU , James Oliver NORMILE , Xiaojin SHI , Xiaosong ZHOU , Ionut HRISTODORESCU
发明人： Gianluca FILIPPINI , Hsi-Jung WU , James Oliver NORMILE , Xiaojin SHI , Xiaosong ZHOU , Ionut HRISTODORESCU
IPC分类号： H04N7/26
CPC分类号： H04N19/90 , H04N19/124 , H04N19/136 , H04N19/154 , H04N19/86
摘要： A method and device for dithering video from a decoder. The method and device provide: selecting a segment of video frames from the video; computing a noise map for the segment of the video, the noise map computed from differences among pixels selected from spatially-distributed sampling patterns in the segment; determining contours of quantization artifacts within the video frame based on the noise map and a histogram of pixel values in the video frame; computing a gradient measurement of pixel values along the contours; identifying regions along the contours of quantization artifacts to apply dithering based on the noise map and the gradient measurement; determining a dithering strength based on the noise map and the gradient measurement; and applying dithering noise to the identified regions at the determined dithering strength.
摘要翻译：一种从解码器抖动视频的方法和装置。该方法和设备提供：从视频中选择一段视频帧; 计算视频段的噪声映射，根据从片段中的空间分布采样模式中选择的像素之间的差异计算的噪声图; 基于噪声图和视频帧中的像素值的直方图确定视频帧内的量化伪像的轮廓; 计算沿着轮廓的像素值的梯度测量; 识别沿着量化伪影轮廓的区域，以基于噪声图和梯度测量应用抖动; 基于噪声图和梯度测量确定抖动强度; 并以确定的抖动强度对所识别的区域施加抖动噪声。

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