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131. 发明授权

US07944971B1 Encoding video 有权
标题翻译：编码视频
公开(公告)号：US07944971B1
公开(公告)日：2011-05-17
申请号：US10429101
申请日：2003-05-01
申请人： Thomas Pun , Roger Kumar , Xiaochun Nie , Hsi-Jung Wu
发明人： Thomas Pun , Roger Kumar , Xiaochun Nie , Hsi-Jung Wu
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04
CPC分类号： H04N19/14 , H04N19/107 , H04N19/122 , H04N19/176
摘要： Some embodiments of the invention provide a method for encoding a video signal that is formed by a series of successive images. Each image includes several sections, and each section has a set of image values. To encode a particular section of a particular image, the method initially partitions the particular section into several sub-sections. For each of at least two particular sub-sections, the method then computes a statistical parameter regarding the image values of the particular sub-section. The method compares the computed statistical parameters, and based on the comparison, selects an encoding technique from a set of encoding techniques to encode the particular section. In some embodiments, the set of encoding schemes includes a first scheme that encodes the selected section without reference to any other section of any other image, and a second scheme that encodes the selected section by reference to at least one other section.
摘要翻译：本发明的一些实施例提供了一种用于编码由一系列连续图像形成的视频信号的方法。每个图像包括几个部分，每个部分都有一组图像值。为了对特定图像的特定部分进行编码，该方法最初将特定部分分成几个子部分。对于至少两个特定子部分中的每一个，该方法然后计算关于特定子部分的图像值的统计参数。该方法比较所计算的统计参数，并且基于该比较，从一组编码技术中选择编码技术以对特定部分进行编码。在一些实施例中，所述编码方案组包括编码所选择的部分而不参考任何其它图像的任何其它部分的第一方案，以及通过参考至少一个其他部分对所选部分进行编码的第二方案。

132. 发明授权

US07940843B1 Method of implementing improved rate control for a multimedia compression and encoding system 有权
标题翻译：实现改进的多媒体压缩和编码系统的速率控制的方法
公开(公告)号：US07940843B1
公开(公告)日：2011-05-10
申请号：US10716316
申请日：2003-11-17
申请人： Xiaochun Nie , Thomas Pun , Hsi-Jung Wu
发明人： Xiaochun Nie , Thomas Pun , Hsi-Jung Wu
IPC分类号： H04N7/26 , H04N7/24 , H04N7/30
CPC分类号： H04N21/23406 , H04N19/115 , H04N19/152 , H04N19/159 , H04N19/162 , H04N19/172 , H04N19/61 , H04N21/2401 , H04N21/44004
摘要： The rate controller in a digital video encoding system is responsible for allocating a bit budget for video frames to be encoded. The rate controller considers many different factors when determining the frame bit budget. One of the factors considered is the complexity of the frames being compressed. Occasionally there will be a very complex frame that is not representative of the overall video frame sequence. Such a rare complex frame may cause a disproportionate affect on the bit budget allocation. The system of the present invention limits the amount that a very complex frame can change the bit budget allocation. The rate controller of the present invention also includes a relaxation factor. The relaxation factor allows a user to determine if the rate controller should strictly allocate its bit budget or relax its standards such that the rate controller may not be so conservative when allocating bits to frames.
摘要翻译：数字视频编码系统中的速率控制器负责为要编码的视频帧分配比特预算。速率控制器在确定帧位预算时会考虑许多不同的因素。考虑的因素之一是被压缩的帧的复杂性。偶尔会有一个非常复杂的帧，不能代表整个视频帧序列。这种罕见的复杂框架可能会对比特预算分配造成不成比例的影响。本发明的系统限制了非常复杂的帧可以改变比特预算分配的量。本发明的速率控制器还包括松弛因子。松弛因子允许用户确定速率控制器是否应严格分配其位预算或放宽其标准，使得速率控制器在将位分配给帧时可能不那么保守。

133. 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。

134. 发明申请

US20100309985A1 VIDEO PROCESSING FOR MASKING CODING ARTIFACTS USING DYNAMIC NOISE MAPS 审中-公开
标题翻译：使用动态噪声源来屏蔽编码艺术的视频处理
公开(公告)号：US20100309985A1
公开(公告)日：2010-12-09
申请号：US12479068
申请日：2009-06-05
申请人： Yuxin LIU , Hsi-Jung WU , Xiaojin SHI , Chris Yoochang CHUNG
发明人： Yuxin LIU , Hsi-Jung WU , Xiaojin SHI , Chris Yoochang CHUNG
IPC分类号： H04N11/02
CPC分类号： H04N19/86 , H04N19/117 , H04N19/136 , H04N19/44 , H04N19/46
摘要： A video decoder system includes a video decoding engine, noise database, artifact estimator and post-processing unit. The video coder may generate recovered video from a data stream of coded video data, which may have visually-perceptible artifacts introduced as a byproduct of compression. The noise database may store a plurality of previously developed noise patches. The artifact estimator may estimate the location of coding artifacts present in the recovered video and select noise patches from the database to mask the artifacts and the post-processing unit may integrate the selected noise patches into the recovered video. In this manner, the video decoder may generate post-processed noise which may mask artifacts that otherwise would be generated by a video coding process.
摘要翻译：视频解码器系统包括视频解码引擎，噪声数据库，伪像估计器和后处理单元。视频编码器可以从编码的视频数据的数据流中生成恢复的视频，该数据流可能具有作为压缩副产品引入的视觉上可察觉的伪影。噪声数据库可以存储多个先前开发的噪声补丁。伪像估计器可以估计存在于恢复的视频中的编码人造物的位置，并从数据库中选择噪声补丁以掩蔽伪影，并且后处理单元可以将所选择的噪声补丁集成到恢复的视频中。以这种方式，视频解码器可以生成后处理噪声，其可以掩蔽否则将由视频编码处理产生的伪影。

135. 发明授权

US07804897B1 Method for implementing an improved quantizer in a multimedia compression and encoding system 有权
标题翻译：在多媒体压缩和编码系统中实现改进的量化器的方法
公开(公告)号：US07804897B1
公开(公告)日：2010-09-28
申请号：US10716265
申请日：2003-11-17
申请人： Thomas Pun , Xiaochun Nie , Hsi-Jung Wu
发明人： Thomas Pun , Xiaochun Nie , Hsi-Jung Wu
IPC分类号： H04N7/26 , H04N7/46
CPC分类号： H04N19/152 , H04N19/124 , H04N19/15 , H04N19/172 , H04N19/176 , H04N19/61
摘要： Some embodiments limit the changes to a buffer occupancy accumulator with respect to a target number of bits of the current frame. Limiting the change of the buffer occupancy accumulator will prevent one odd significantly different frame from significantly changing the quantization. Some embodiments improve upon the quantizer adjustment by making more accurate estimates of the amount of information needed to encode each macroblock. Specifically, some embodiments estimate the bits per macroblock in a manner that varies from frame type to frame type. Specifically, for frame types with motion compensation, some embodiments exploit the correlation between the complexity of the macroblock and the number of bits needed. In the case of frame types without motion compensation, some embodiments impose a model that biases bit allocation towards smaller activity macro blocks.
摘要翻译：一些实施例相对于当前帧的目标位数限制对缓冲器占用累加器的改变。限制缓冲占用累加器的变化将阻止一个奇怪的显着不同的帧显着改变量化。一些实施例通过对编码每个宏块所需的信息量进行更准确的估计来改进量化器调整。具体地，一些实施例以从帧类型到帧类型变化的方式估计每个宏块的比特。具体来说，对于具有运动补偿的帧类型，一些实施例利用了宏块的复杂度和所需位数之间的相关性。在没有运动补偿的帧类型的情况下，一些实施例施加将比特分配偏向较小的活动宏块的模型。

136. 发明申请

US20100067792A1 DIGITAL IMAGE CODING SYSTEM HAVING SELF-ADJUSTING SELECTION CRITERIA FOR SELECTING A TRANSFORM FUNCTION 有权
标题翻译：具有自我调整选择标准的数字图像编码系统，用于选择变换函数
公开(公告)号：US20100067792A1
公开(公告)日：2010-03-18
申请号：US12538850
申请日：2009-08-10
申请人： Hsi-Jung Wu , Yu Tina Tian , Jian Lu , Ke-Chiang Chu
发明人： Hsi-Jung Wu , Yu Tina Tian , Jian Lu , Ke-Chiang Chu
IPC分类号： G06K9/36 , G06K9/38
CPC分类号： G06T9/007 , H04N19/122 , H04N19/132 , H04N19/139 , H04N19/14 , H04N19/154 , H04N19/176 , H04N19/18 , H04N19/196 , H04N19/198 , H04N19/61
摘要： In a digital signal processing system, a method for selecting a transform function to apply to an input signal based on characteristics of the signal, and for self-adjusting criteria which are used in selecting a transform function to apply to a subsequent signal. Characteristics are obtained from the signal. The characteristics are compared to adjustable criteria which are used in selecting a transform function. Differing criteria are maintained for the different selectable transform functions. A record is maintained of transform functions selected and the particular characteristics that caused the selection. Based on the ability of a transform function to minimally define the coded signal, an inverse transform function is selected to decode the signal. The criteria used in selecting a transform function to apply to a subsequent signal are adjusted based on a quality measure of the decoded signal and the record of selected transform functions.
摘要翻译：在数字信号处理系统中，提供了一种用于根据信号的特性选择适用于输入信号的变换函数的方法，以及用于选择变换函数以应用于后续信号的自调整准则的方法。从信号获得特性。将特征与用于选择变换函数的可调标准进行比较。对于不同的可选变换函数维持不同的标准。保留所选择的变换函数和导致选择的特定特征的记录。基于变换函数最小化定义编码信号的能力，选择逆变换函数来对信号进行解码。基于解码信号的质量测量和所选择的变换函数的记录来调整用于选择应用于后续信号的变换函数的标准。

137. 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。

138. 发明申请

US20090304071A1 ADAPTIVE APPLICATION OF ENTROPY CODING METHODS 审中-公开
标题翻译：熵编码方法的自适应应用
公开(公告)号：US20090304071A1
公开(公告)日：2009-12-10
申请号：US12415461
申请日：2009-03-31
申请人： Xiaojin SHI , Hsi-Jung WU
发明人： Xiaojin SHI , Hsi-Jung WU
IPC分类号： H04N7/26
CPC分类号： H04N19/93 , H04N19/12 , H04N19/13 , H04N19/146 , H04N19/154 , H04N19/156 , H04N19/17 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/18 , H04N19/187
摘要： Disclosed is an exemplary video coder and method that provide a video decoder control method for analyzing data to schedule coding of the data. Input data may be encoded to a plurality of different encoding. It may be determined if a minimum number of the plurality of different encodings comply with at least one of a bitrate constraint and a computational complexity constraint. An encoding may be selected from the compliant encodings that maximizes the quality of the decoded data. Quality may be determined based on at least one predetermined metric related to the selected encoding; and the selected encoding may be delivered to an output buffer.
摘要翻译：公开了一种示例性视频编码器和方法，其提供用于分析数据以调度数据编码的视频解码器控制方法。输入数据可以被编码为多个不同的编码。可以确定多个不同编码的最小数目是否符合比特率约束和计算复杂度约束中的至少一个。可以从使解码数据的质量最大化的顺从编码中选择编码。可以基于与所选择的编码相关的至少一个预定度量来确定质量; 并且所选择的编码可以被传递到输出缓冲器。

139. 发明授权

US07391812B2 Adaptively post filtering encoded video 有权
标题翻译：自适应过滤编码视频
公开(公告)号：US07391812B2
公开(公告)日：2008-06-24
申请号：US10427756
申请日：2003-04-30
申请人： Thomas Pun , Maynard Handley , Roger Kumar , Xiaochun Nie , Hsi-Jung Wu
发明人： Thomas Pun , Maynard Handley , Roger Kumar , Xiaochun Nie , Hsi-Jung Wu
IPC分类号： H04N7/18
CPC分类号： G06T5/002 , G06T2207/10016 , H04N19/117 , H04N19/127 , H04N19/156 , H04N19/527 , H04N19/86
摘要： Some embodiments of the invention provide a method of decoding an encoded video signal that includes a plurality of successive encoded images. The method initially receives an encoded image of the video signal. It then decodes the encoded image. The method next examines the decoded image to determine whether the decoded image satisfies at least one criterion for performing a post-filter operation on the decoded image. Only if the decoded image satisfies the criterion, the method performs the post-filter operation on the decoded image. The criterion in some embodiments is whether the amount of time for applying the post-filter operation exceeds the remaining amount of time that the method has to process the received image. Some embodiments of the invention provide a method of post-filtering a current image that was decoded from an encoded video signal, which includes a plurality of successive encoded images. The current image has several sub-sections. The method selects a sub-section of the current image. It then determines whether the selected sub-section satisfies at least one condition for performing a post-filter operation on the selected sub-section. The method next performs the post-filter operation on the selected sub-section only if the selected sub-section satisfies the criterion.
摘要翻译：本发明的一些实施例提供了一种对包括多个连续编码图像的编码视频信号进行解码的方法。该方法最初接收视频信号的编码图像。然后解码编码图像。接下来，该方法检查解码图像，以确定解码图像是否满足对解码图像执行后置滤波操作的至少一个准则。只有解码图像满足标准，该方法对解码图像执行后置滤波操作。一些实施例中的标准是用于应用后置滤波器操作的时间量是否超过该方法必须处理接收到的图像的剩余时间量。本发明的一些实施例提供了一种对从包括多个连续编码图像的编码视频信号进行解码的当前图像进行后置滤波的方法。当前图像有几个子部分。该方法选择当前图像的子部分。然后，确定所选择的子部分是否满足对所选择的子部分执行后置滤波操作的至少一个条件。该方法仅在所选择的子部分满足标准时才对所选择的子部分执行后置滤波操作。

140. 发明申请

US20080063085A1 POST-PROCESSING FOR DECODER COMPLEXITY SCALABILITY 有权
标题翻译：解码器复杂度可扩展性的后处理
公开(公告)号：US20080063085A1
公开(公告)日：2008-03-13
申请号：US11530810
申请日：2006-09-11
申请人： Hsi-Jung WU , Ionut HRISTODORESCU , Christian L. DUVIVIER , James NORMILE , Jochen Christian SCHMIDT , Chris Yoochang CHUNG
发明人： Hsi-Jung WU , Ionut HRISTODORESCU , Christian L. DUVIVIER , James NORMILE , Jochen Christian SCHMIDT , Chris Yoochang CHUNG
IPC分类号： H04N11/02 , H04N7/12
CPC分类号： H04N7/26946 , H04N19/117 , H04N19/156 , H04N19/176 , H04N19/196 , H04N19/423 , H04N19/44 , H04N19/46 , H04N19/61 , H04N19/70 , H04N19/86
摘要： Systems, apparatuses and methods whereby a base coded video signal is provided to a decoder having a set of post-processing stages. The base coded video signal can be decoded to produce a base decoded video signal. Post-processing of the base decoded video signal can be used to produce an enhanced quality video output signal. Application of a post-processing stage can be implemented according to the capabilities of the decoder and/or the instantaneous operating parameters of the decoder and/or characteristics of a display. A control signal, communicated over a dedicated channel separate from the base coded video signal, can be used initiate and/or aid implementation of a post-processing stage. The control signal can also provide information to assist/manage the decoding of the base coded video signal. The use of additional post-processing stages increases the complexity of an overall decoding process while improving the quality of a resulting reproduced video sequence.
摘要翻译：将基本编码视频信号提供给具有一组后处理级的解码器的系统，装置和方法。基编码视频信号可被解码以产生基本解码视频信号。可以使用基本解码视频信号的后处理来产生增强的质量视频输出信号。后处理阶段的应用可以根据解码器的能力和/或解码器的瞬时操作参数和/或显示器的特性来实现。可以使用通过与基本编码视频信号分开的专用信道传送的控制信号来启动和/或辅助后处理阶段的实现。控制信号还可以提供信息来辅助/管理基本编码视频信号的解码。使用额外的后处理级增加了整体解码过程的复杂性，同时提高了所得到的再现视频序列的质量。

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