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公开(公告)号：US20140169449A1
公开(公告)日：2014-06-19
申请号：US14131191
申请日：2012-05-04
IPC分类号： H04N19/105 , H04N19/30
CPC分类号： H04N19/105 , H04N19/30 , H04N19/31 , H04N19/44 , H04N19/503 , H04N19/65
摘要： An encoded representation (60) of a picture (10) of a video stream (1) is decoded by retrieving buffer description information defining at least one reference picture (40, 42). The buffer description information is used to determine a picture identifier of a reference picture (40, 42), which is compared to picture identifiers of reference pictures (40, 42) stored in a decoded picture buffer (230, 350). If the reference picture (40, 42) is determined to be missing based on the comparison of picture identifiers the layer identifier of the reference picture (40, 42) obtained based on the buffer description information is compared to a layer identifier of the current picture (10) in order to determine whether the missing reference picture (40, 42) has been intentionally removed or is unintentionally lost.
摘要翻译： 视频流（1）的图像（10）的编码表示（60）通过检索定义至少一个参考图片（40,42）的缓冲器描述信息来解码。 缓冲器描述信息用于确定与存储在解码图像缓冲器（230,350）中的参考图像（40,42）的图像标识符进行比较的参考图像（40,42）的图像标识符。 如果基于图像标识符的比较确定参考图像（40,42）丢失，则将基于缓冲器描述信息获得的参考图像（40,42）的层标识符与当前图像的层标识符进行比较 （10），以便确定丢失的参考图片（40,42）是否被故意地去除或是无意中丢失。
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2.发明申请Encoder and Decoder and Methods Thereof for Encoding/Decoding a Picture of a Video Sequence 有权编码器和解码器及其方法，用于对视频序列的图像进行编码/解码公开(公告)号：US20140079119A1
公开(公告)日：2014-03-20
申请号：US13643688
申请日：2012-10-23
CPC分类号： H04N19/50 , H04N19/423 , H04N19/44 , H04N19/70
摘要： An object of the embodiments is to achieve an improved reference picture handling. That is achieved by taking into account whether the reference pictures in the decoded picture buffer are long-term reference pictures or short-term reference pictures when determining how they should be marked when the information of the reference picture set is received. The reference pictures are marked as “used for short-term reference” or “used for long-term reference” in the Decoded Picture Buffer (DPB) depending on whether they are included as short-term pictures or long-term pictures in the RPS of a current picture.
摘要翻译： 实施例的目的是实现改进的参考图像处理。 这是通过考虑当接收到参考图像集的信息时确定如何标记它们时，解码图像缓冲器中的参考图像是长期参考图像还是短期参考图像来实现。 在解码图像缓冲器（DPB）中，参考图像被标记为“用于短期参考”或“用于长期参考”，这取决于它们是否被包含在RPS中作为短期图像或长期图像 的当前图片。
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公开(公告)号：US08670488B2
公开(公告)日：2014-03-11
申请号：US12808992
申请日：2008-07-31
CPC分类号： H04N19/157 , H04N19/11 , H04N19/14 , H04N19/146 , H04N19/176 , H04N19/61
摘要： In video encoding and decoding predictions may be generated by intra-frame prediction. Intra-frame prediction uses reconstructed pixels in a reconstructed frame. Intra-frame prediction is performed by extending the reconstructed pixels into a predicted block using intra-frame prediction modes, each intra-frame prediction mode indicating a direction of the extension. In order to reduce the number of possible intra-frame prediction modes, a subset is selected from a predetermined set of possible intra-frame prediction modes. A subset of intra-frame prediction modes can be created by forming preselection sets of intra-frame prediction modes on the basis of similarity of their associated predicted blocks and selecting a representative intra-frame prediction mode from each preselection set.
摘要翻译： 在视频编码和解码中，可以通过帧内预测来生成预测。 帧内预测使用重构帧中的重构像素。 通过使用帧内预测模式将重构像素扩展为预测块来进行帧内预测，每个帧内预测模式指示扩展方向。 为了减少可能的帧内预测模式的数量，从可能的帧内预测模式的预定集合中选择一个子集。 可以通过基于其相关联的预测块的相似度并从每个预选集中选择代表性帧内预测模式来形成帧内预测模式的预选集来创建帧内预测模式的子集。
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公开(公告)号：US08498495B2
公开(公告)日：2013-07-30
申请号：US12524309
申请日：2008-01-14
CPC分类号： H04N19/527 , G06T7/20 , G06T7/215 , G06T2207/10016 , G06T2207/20021 , H04N1/38 , H04N1/3872 , H04N19/132 , H04N19/172 , H04N19/513 , H04N19/553 , H04N19/587
摘要： A border region is identified in an image by calculating an average of pixel values in a row or column of the image. Differences in property values are determined between each pixel in the row or column and a neighboring pixel present on a same column or row but in a neighboring row or column. An average difference is calculated based on these differences. The pixels in the row or column are classified as belonging to a border region or internal region of the image based on the average pixel value and the average pixel difference.
摘要翻译： 通过计算图像的行或列中的像素值的平均值，在图像中识别边界区域。 在行或列中的每个像素与存在于同一列或行上但在相邻行或列中的相邻像素之间确定属性值的差异。 基于这些差异计算平均差。 基于平均像素值和平均像素差，行或列中的像素被分类为属于图像的边界区域或内部区域。
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公开(公告)号：US20100284461A1
公开(公告)日：2010-11-11
申请号：US12811996
申请日：2009-01-08
IPC分类号： H04N7/32
CPC分类号： H04N19/82 , H04N19/117 , H04N19/136 , H04N19/176 , H04N19/463 , H04N19/61 , H04N19/70
摘要： A method of encoding a plurality of adaptive filter coefficients (104, 107, 112) into a bitstream (110). The method comprises the steps of entropy encoding (109) the adaptive filter coefficients (104, 107, 112) into the bitstream (110), whereby a prediction (202) for an instance (204) of the adaptive filter coefficients is determined (201) based on at least one of the remaining adaptive filter coefficients (206), a prediction error (205) is determined (203) based on the difference between the instance (204) of the adaptive filter coefficients and the prediction (202), and wherein the step of entropy encoding (109) the plurality of adaptive filter coefficients (104, 107, 112) comprises entropy encoding (109) the prediction error (205) for the instance (204) of the adaptive filter coefficients and entropy encoding (109) the remaining adaptive filter coefficients (206). Further is provided a corresponding method of decoding a bitstream (110) of encoded adaptive filter coefficients into decoded adaptive filter coefficients (116, 118, 120, 123).
摘要翻译： 一种将多个自适应滤波器系数（104,107,112）编码为比特流（110）的方法。 该方法包括以下步骤：将自适应滤波器系数（104,107,112）熵编码（109）到比特流（110）中，由此确定自适应滤波器系数的实例（204）的预测（202）（201 ）基于所述剩余自适应滤波器系数（206）中的至少一个，基于所述自适应滤波器系数的实例（204）与所述预测（202）之间的差异来确定（203）预测误差（205），以及 其中所述多个自适应滤波器系数（104,107,112）的熵编码（109）的步骤包括对所述自适应滤波器系数和熵编码（109）的实例（204）进行熵编码（109）所述预测误差（205） ）剩余的自适应滤波器系数（206）。 还提供了将经编码的自适应滤波器系数的比特流（110）解码为解码的自适应滤波器系数（116,118,120,123）的相应方法。
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公开(公告)号：US20100149422A1
公开(公告)日：2010-06-17
申请号：US12524298
申请日：2008-01-14
IPC分类号： H04N5/14
CPC分类号： H04N19/895 , G06T7/194 , G06T7/215 , G06T2207/10016 , G06T2207/20021 , G06T2207/30224 , H04N19/102 , H04N19/132 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/527 , H04N19/587
摘要： An image processing method involves determining a global motion between a reference frame and a current frame in a frame sequence. A reference block is identified in the reference frame for a current block based on the global motion. A classification parameter is calculated based on the pixel values of the current block and the reference block. The parameter can be used for classifying the block as belonging to the background or foreground of the current frame. The parameter is preferably also utilized in frame rate-up conversion when extrapolating or interpolating new frames.
摘要翻译： 图像处理方法包括确定帧序列中参考帧和当前帧之间的全局运动。 基于全局运动在当前块的参考帧中识别参考块。 基于当前块和参考块的像素值计算分类参数。 该参数可用于将块分类为属于当前帧的背景或前景。 当推断或内插新帧时，该参数也优选地用于帧速率转换。
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公开(公告)号：US20140126640A1
公开(公告)日：2014-05-08
申请号：US14127545
申请日：2012-04-27
IPC分类号： H04N19/433 , H04N19/51 , H04N19/583 , H04N19/46
CPC分类号： H04N19/433 , H04N19/46 , H04N19/573 , H04N19/58 , H04N19/61 , H04N19/70 , H04N19/89
摘要： An encoded representation (60) of a picture (10) of a video stream (1) is decoded by retrieving buffer description information identifying a buffer description defining multiple reference pictures (40, 42) of the video stream (1) from the encoded representation (60). A picture identifier of a reference picture (42) is determined based on picture identifier information retrieved from the buffer description for the reference picture (42) and a reference picture preceding the reference picture according to a list order in the buffer description. The determined picture identifier is used to update a decoded picture buffer (230, 350) that stores reference pictures (40, 42) to be used as decoding reference for the picture (10) and/or any subsequent picture (50) of the video stream (1).
摘要翻译： 视频流（1）的图像（10）的编码表示（60）通过从编码表示中检索识别视频流（1）的多个参考图像（40,42）的缓冲器描述的缓冲器描述信息来解码 （60）。 根据缓冲器描述中的列表顺序，基于从参考图像（42）的缓冲器描述中获取的图像标识符信息和参考图像之前的参考图像来确定参考图像（42）的图像标识符。 所确定的图像标识符用于更新存储参考图像（40,42）的解码图像缓冲器（230,350），以用作图像（10）的解码参考和/或视频的任何后续图像（50） 流（1）。
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8.发明申请公开(公告)号：US20140079115A1
公开(公告)日：2014-03-20
申请号：US14000506
申请日：2013-07-01
申请人： Jacob Ström , Jonatan Samuelsson , Rickard Sjöberg
发明人： Jacob Ström , Jonatan Samuelsson , Rickard Sjöberg
IPC分类号： H04N7/26
CPC分类号： H04N19/58 , H04N19/105 , H04N19/136 , H04N19/139 , H04N19/174 , H04N19/176 , H04N19/463 , H04N19/70
摘要： A method of encoding a video sequence comprising Reference Picture Sets (RPSs) is provided. The method comprises arranging the RPSs in transmission order in a data structure, such as a Sequence Parameter Set (SPS), determining whether explicit RPS transmission is used for an RPS of a current picture of the video sequence, and encoding information indicating an RPS comprised in the data structure to be used for predicting the RPS of the current picture, such as delta_idx_minus1, only if explicit RPS transmission is used. By transmitting delta_idx_minus1 only if explicit RPS transmission is used, and interpreting delta_idx_minus1 to be equal to zero otherwise, a reduced bitrate is achieved. Further, a method of decoding a video sequence comprising RPSs, corresponding computer programs and computer program products, as well as corresponding encoders and decoders are provided.
摘要翻译： 提供了一种编码包括参考图像集（RPS）的视频序列的方法。 该方法包括以诸如序列参数集（SPS）的数据结构中的传输顺序来布置RPS，确定是否将用于视频序列的当前图像的RPS的显式RPS传输用于指示包括的RPS的编码信息 在用于预测当前图像的RPS的数据结构中，例如Δ_idx_minus1，仅在使用显式RPS传输时。 只有当使用了显式RPS传输时才传输delta_idx_minus1，否则将delta_idx_minus1解释为等于零，就可以实现降低的比特率。 此外，提供了一种对包括RPS，对应的计算机程序和计算机程序产品的视频序列进行解码的方法，以及对应的编码器和解码器。
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公开(公告)号：US20140072038A1
公开(公告)日：2014-03-13
申请号：US13704227
申请日：2012-09-27
IPC分类号： H04N7/36
CPC分类号： H04N19/107 , H04N19/31 , H04N19/503 , H04N19/70
摘要： In a method performed by an encoder according to a first aspect a one-bit flag is signaled, wherein the one-bit flag is associated with a reference picture in a buffer description for the current picture. The one-bit flag is set to explicitly indicate to a decoder if the reference picture should be included in a list of reference pictures or not included in the list of reference pictures. The list of reference pictures indicates which pictures that can be used for decoding the current picture.
摘要翻译： 在由根据第一方面的编码器执行的方法中，用信号通知一位标志，其中所述一位标志与当前图像的缓冲器描述中的参考图像相关联。 如果参考图片应包括在参考图片的列表中，或者不包括在参考图片的列表中，则将一位标志设置为向解码器显式地指示。 参考图片的列表指示可用于解码当前照片的哪些图像。
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公开(公告)号：US20130294511A1
公开(公告)日：2013-11-07
申请号：US13978918
申请日：2012-01-12
IPC分类号： H04N7/32
CPC分类号： H04N19/59 , H04N19/159 , H04N19/174 , H04N19/176 , H04N19/182 , H04N19/50
摘要： Encoder, decoder and methods for intra coding of video. The method in the decoder relates to decoding of an intra coded block IZ having a number N of neighboring blocks CU1-CUN. When at least one block CUk of the number of neighboring blocks is unavailable for intra prediction, pixel values for spatial positions covered by CUk are estimated based on at least one pixel value of at least one of blocks CUk−m and CUk+p within the range [CU1-CUk−1, CUk+1-CUN] of blocks, which is available for intra prediction. Further, the block IZ is decoded, using the estimated pixel values for prediction, thus generating a block Z of pixels. k, m and p are integers, and 1≦k≦N; 1≦m≦k; and 1≦p≦N−k; and N is a positive integer.
摘要翻译： 编码器，解码器和视频内编码方法。 解码器中的方法涉及具有相邻块CU1-CUN的数目N的帧内编码块IZ的解码。 当相邻块的数量的至少一个块CU k不可用于帧内预测时，基于CUk-m和CUk + p中的至少一个块CUk-m和CUk + p中的至少一个的至少一个像素值来估计由CUK覆盖的空间位置的像素值 范围[CU1-CUK-1，CUK + 1-CUN]，可用于帧内预测。 此外，使用估计的用于预测的像素值来解码块IZ，从而生成像素块Z。 k，m和p是整数，1 @ k @ N; 1 @ m @ k; 和1 @ p @ N-k; 并且N是正整数。
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