公开(公告)号：US20100086029A1

公开(公告)日：2010-04-08

申请号：US12562412

申请日：2009-09-18

申请人： Peisong Chen ,  Yan Ye ,  Marta Karczewicz

发明人： Peisong Chen ,  Yan Ye ,  Marta Karczewicz

IPC分类号： H04N7/12

CPC分类号： H04N19/103 ,  H04N19/147 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70

摘要： Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels, for example, 64×64 pixels. In one example, an apparatus includes a video encoder configured to encode a video block having a size of more than 16×16 pixels, generate block-type syntax information that indicates the size of the block, and generate a coded block pattern value for the encoded block, wherein the coded block pattern value indicates whether the encoded block includes at least one non-zero coefficient. The encoder may set the coded block pattern value to zero when the encoded block does not include at least one non-zero coefficient or set the coded block pattern value to one when the encoded block includes a non-zero coefficient.

摘要翻译： 描述了使用比常规视频编码和解码标准规定的宏块大的宏块来对数字视频数据进行编码和解码的技术。 例如，这些技术包括使用包括大于16×16像素（例如，64×64像素）的宏块对视频流进行编码和解码。 在一个示例中，一种装置包括视频编码器，被配置为对具有大于16×16像素的大小的视频块进行编码，生成指示块大小的块类型语法信息，并生成用于 编码块，其中编码块模式值指示编码块是否包括至少一个非零系数。 当编码块不包括至少一个非零系数时，编码器可以将编码块模式值设置为零，或者当编码块包括非零系数时将编码块模式值设置为1。

公开(公告)号：US20090262801A1

公开(公告)日：2009-10-22

申请号：US12104961

申请日：2008-04-17

申请人： Peisong Chen ,  Phanikumar Bhamidipati

发明人： Peisong Chen ,  Phanikumar Bhamidipati

IPC分类号： H04N7/26

CPC分类号： H04N19/174 ,  H04N19/126 ,  H04N19/146 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18

摘要： Quantization techniques are used in video coding to quantize residual coefficients. So-called “dead zone parameters” are selected in the quantization process of residual coefficients of residual video blocks. The dead zone refers to a region of magnitude for coefficients below which any coefficient will be quantized to zero. A method and apparatus of quantizing coefficient values of video blocks in a video coding scheme is provided. A quantization parameter is selected for a set of video blocks. Dead zone parameters are then selected for different video blocks in the set of video blocks. Next, the quantization parameter and the dead zone parameters are applied to quantize the coefficient values of each of the video blocks.

摘要翻译： 量化技术用于视频编码以量化残差系数。 在剩余视频块的剩余系数的量化处理中选择所谓的“死区参数”。 死区是指系数的大小范围，其中任何系数将被量化为零。 提供了一种量化视频编码方案中的视频块的系数值的方法和装置。 为一组视频块选择量化参数。 然后对视频块集合中的不同视频块选择死区参数。 接下来，应用量化参数和死区参数来量化每个视频块的系数值。

公开(公告)号：US20090257499A1

公开(公告)日：2009-10-15

申请号：US12420235

申请日：2009-04-08

申请人： Marta Karczewicz ,  Yan Ye ,  Peisong Chen

发明人： Marta Karczewicz ,  Yan Ye ,  Peisong Chen

IPC分类号： H04N7/32 ,  H04N7/26

CPC分类号： H04N19/523 ,  H04N19/117 ,  H04N19/136 ,  H04N19/147 ,  H04N19/182 ,  H04N19/192 ,  H04N19/70 ,  H04N19/82

摘要： This disclosure describes various interpolation techniques performed by an encoder and a decoder during the motion compensation process of video coding. In one example, an encoder interpolates pixel values of reference video data based on a plurality of different pre-defined interpolation filters. In this example, the decoder receives a syntax element that identifies an interpolation filter, and interpolates pixel values of reference video data based on the interpolation filter identified by the syntax element. In another example, a method of interpolating predictive video data includes generating half-pixel values based on integer pixel values, rounding the half-pixel values to generate half-pixel interpolated values, storing the half-pixel values as non-rounded versions of the half-pixel values, and generating quarter-pixel values based on the non-rounded versions of the half-pixel values and the integer pixel values.

摘要翻译： 本公开描述了在视频编码的运动补偿过程期间由编码器和解码器执行的各种插值技术。 在一个示例中，编码器基于多个不同的预定义内插滤波器来内插参考视频数据的像素值。 在该示例中，解码器接收标识内插滤波器的语法元素，并且基于由语法元素识别的内插滤波器内插参考视频数据的像素值。 在另一示例中，内插预测性视频数据的方法包括基于整数像素值生成半像素值，对半像素值进行舍入以产生半像素内插值，将半像素值存储为非整数版本的 基于半像素值和整数像素值的非圆形版本生成四分之一像素值。

公开(公告)号：US20090257489A1

公开(公告)日：2009-10-15

申请号：US12338838

申请日：2008-12-18

申请人： Marta Karczewicz ,  Peisong Chen ,  Yan Ye

发明人： Marta Karczewicz ,  Peisong Chen ,  Yan Ye

IPC分类号： H04N7/12

CPC分类号： H04N19/124 ,  H04N19/126

摘要： In general, this disclosure provides techniques for quantization of the coefficients of video blocks in a manner that can achieve a desirable balance of rate and distortion. The described techniques may analyze a plurality of quantization levels associated with each individual coefficient to select the quantization level for the individual coefficients that results in a lowest coding cost. Since CAVLC does not encode each coefficient independently, the techniques may compute the coding costs for each of the candidate quantization levels associated with the individual coefficients based on quantization levels selected for previously quantized coefficients and estimated (or predicted) quantization levels for subsequent coefficients of a coefficient vector. The quantization levels for each of the coefficients are selected based on computed coding costs to obtain a set of quantized coefficients that minimize a rate-distortion model.

摘要翻译： 通常，本公开提供了以可以实现速率和失真的期望平衡的方式来量化视频块的系数的技术。 所描述的技术可以分析与每个单独系数相关联的多个量化级别，以选择导致最低编码成本的各个系数的量化级别。 由于CAVLC不独立地对每个系数进行编码，所以这些技术可以基于针对先前量化的系数选择的量化级别和针对先前量化的系数的估计（或预测的）量化级别计算与各个系数相关联的每个候选量化级别的编码成本， 系数向量。 基于计算的编码成本来选择每个系数的量化级别，以获得最小化速率 - 失真模型的一组量化系数。

公开(公告)号：US20090213930A1

公开(公告)日：2009-08-27

申请号：US12389693

申请日：2009-02-20

申请人： Yan Ye ,  Marta Karczewicz ,  Peisong Chen

发明人： Yan Ye ,  Marta Karczewicz ,  Peisong Chen

IPC分类号： H04N7/26

CPC分类号： H04N19/124 ,  H04N19/147 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61

摘要： A system and method for encoding multimedia video is described. As video is encoded a quantization parameter is selected for each macroblock. As described herein, the quantization parameter for each macroblock may be selected by limiting the universe of all possible quantization parameters to a particular range of possible quantization parameter values. This increases the speed of video encoding by reducing the number of quantization parameters that are tested for each video macroblock.

摘要翻译： 描述了一种用于编码多媒体视频的系统和方法。 当视频被编码时，为每个宏块选择量化参数。 如本文所述，可以通过将所有可能的量化参数的范围限制到可能的量化参数值的特定范围来选择每个宏块的量化参数。 这通过减少为每个视频宏块测试的量化参数的数量来增加视频编码的速度。

公开(公告)号：US20080212673A1

公开(公告)日：2008-09-04

申请号：US11837062

申请日：2007-08-10

申请人： Peisong Chen

发明人： Peisong Chen

IPC分类号： H04N7/26

CPC分类号： H04N19/146 ,  H04N19/107 ,  H04N19/132 ,  H04N19/172 ,  H04N19/30

摘要： The invention includes apparatus, systems and methods for processing multimedia data. A method of processing multimedia data may include encoding a frame of the multimedia data as an I frame, a channel switch frame, and a P frame and selecting the encoded I frame if a size of the encoded I frame and a size of the encoded channel switch frame and the encoded P frame meet a first condition. An apparatus for processing multimedia data may include an encoder for encoding a frame of the multimedia data as an I frame, a channel switch frame, and a P frame and selecting the encoded I frame if a size of the encoded I frame and a size of the encoded channel switch frame and the encoded P frame meet a first condition.

摘要翻译： 本发明包括用于处理多媒体数据的装置，系统和方法。 处理多媒体数据的方法可以包括将多媒体数据的帧编码为I帧，信道切换帧和P帧，并且如果编码的I帧的大小和编码信道的大小，则选择编码的I帧 开关帧和编码的P帧满足第一个条件。 用于处理多媒体数据的装置可以包括用于将多媒体数据的帧作为I帧，信道切换帧和P帧进行编码的编码器，并且如果编码的I帧的大小和编码的I帧的大小 编码信道切换帧和编码P帧满足第一条件。

公开(公告)号：US20070201755A1

公开(公告)日：2007-08-30

申请号：US11505789

申请日：2006-08-16

申请人： Peisong Chen ,  Vijayalakshmi Raveendran ,  Fang Shi

发明人： Peisong Chen ,  Vijayalakshmi Raveendran ,  Fang Shi

IPC分类号： G06K9/46

CPC分类号： H04N7/26585 ,  H04N19/122 ,  H04N19/1883 ,  H04N19/61 ,  H04N19/63 ,  H04N19/635

摘要： This disclosure describes frame interpolation techniques within a wavelet transform coding scheme. The frame interpolation may be used to generate one or more interpolated frames between two successive low frequency frames coded according to the wavelet transform coding scheme. Such interpolation may be useful to increase the frame rate of a multimedia sequence that is coded via wavelet transforms. Also, the techniques may be used to interpolate lost frames, e.g., which may be lost during wireless transmission.

摘要翻译： 本公开描述了小波变换编码方案内的帧插值技术。 帧内插可以用于在根据小波变换编码方案编码的两个连续低频帧之间生成一个或多个内插帧。 这种内插可能有助于增加通过小波变换编码的多媒体序列的帧速率。 此外，这些技术可以用于内插丢失的帧，例如在无线传输期间丢失的帧。

公开(公告)号：US20050249285A1

公开(公告)日：2005-11-10

申请号：US11093874

申请日：2005-03-29

申请人： Peisong Chen ,  Vijayalakshmi Raveendran

发明人： Peisong Chen ,  Vijayalakshmi Raveendran

IPC分类号： G06T9/00 ,  H04N7/36 ,  H04N7/46 ,  H04N7/50 ,  H04N7/12

CPC分类号： H04N19/587 ,  H04N19/132 ,  H04N19/31 ,  H04N19/51

摘要： The invention is directed to a method and apparatus for providing temporal scaling frames for use in digital multimedia. The method involves using a removable unidirectional predicted temporal scaling frame communication along with intra-coded frames and/or inter-coded frames. The method involves the ability to selectively remove the temporal scaling frame(s) from being transmitted or decoded in order to satisfy, for example, power limits, data rate limits, computational limits or channel conditions. Examples presented include encoders, transcoders and decoders where the decision to drop the removable temporal scaling frames could be made.

摘要翻译： 本发明涉及用于提供用于数字多媒体的时间缩放帧的方法和装置。 该方法涉及使用可移动单向预测的时间缩放帧通信以及帧内编码帧和/或帧间编码帧。 该方法涉及到能够选择性地去除时间缩放帧以被传送或解码以满足例如功率限制，数据速率限制，计算限制或信道条件。 提出的示例包括编码器，代码转换器和解码器，其中可以进行放弃可移动时间缩放框架的决定。

公开(公告)号：US09848197B2

公开(公告)日：2017-12-19

申请号：US13414232

申请日：2012-03-07

申请人： Ying Chen ,  Liwei Guo ,  Peisong Chen ,  Xianglin Wang ,  Marta Karczewicz

发明人： Ying Chen ,  Liwei Guo ,  Peisong Chen ,  Xianglin Wang ,  Marta Karczewicz

IPC分类号： H04N19/122 ,  H04N19/186 ,  H04N19/176 ,  H04N19/96

CPC分类号： H04N19/186 ,  H04N19/122 ,  H04N19/176 ,  H04N19/96

摘要： Aspects of this disclosure relate to a method of coding video data. In an example, the method includes determining a first residual quadtree (RQT) depth at which to apply a first transform to luma information associated with a block of video data, wherein the RQT represents a manner in which transforms are applied to luma information and chroma information. The method also includes determining a second RQT depth at which to apply a second transform to the chroma information associated with the block of video data, wherein the second RQT depth is different than the first RQT depth. The method also includes coding the luma information at the first RQT depth and the chroma information at the second RQT depth.

公开(公告)号：US09716920B2

公开(公告)日：2017-07-25

申请号：US13154247

申请日：2011-06-06

申请人： Ying Chen ,  Peisong Chen ,  Marta Karczewicz

发明人： Ying Chen ,  Peisong Chen ,  Marta Karczewicz

IPC分类号： H04N13/00 ,  H04N21/81 ,  H04N21/218 ,  H04N21/235 ,  H04N21/2365 ,  H04N21/435 ,  H04N21/61 ,  H04N21/658 ,  H04N21/84 ,  H04N19/597 ,  H04N19/70

CPC分类号： H04N21/816 ,  H04N19/597 ,  H04N19/70 ,  H04N21/21805 ,  H04N21/235 ,  H04N21/2365 ,  H04N21/435 ,  H04N21/6125 ,  H04N21/6581 ,  H04N21/84

摘要： In one example, an apparatus includes a processor configured to receive video data for two or more views of a scene, determine horizontal locations of camera perspectives for each of the two or more views, assign view identifiers to the two or more views such that the view identifiers correspond to the relative horizontal locations of the camera perspectives, form a representation comprising a subset of the two or more views, and, in response to a request from a client device, send information indicative of a maximum view identifier and a minimum view identifier for the representation to the client device.