公开(公告)号：US07379501B2

公开(公告)日：2008-05-27

申请号：US10342439

申请日：2003-01-14

申请人： Jani Lainema

发明人： Jani Lainema

IPC分类号： H04N7/12

CPC分类号： H04N19/523 ,  H04N19/117 ,  H04N19/136 ,  H04N19/172 ,  H04N19/176 ,  H04N19/196 ,  H04N19/197 ,  H04N19/46 ,  H04N19/463 ,  H04N19/61 ,  H04N19/80 ,  H04N19/89

摘要： A video coding system for coding a sequence of video frames each having an array of pixel values is provided. The system includes an interpolation filter to reconstruct sub-pixel values for use in the inter-frame prediction process. The coefficients of an interpolation filter are obtained differentially with respect to a predefined base filter in order to provide a set of difference values. As the base filter coefficients are known to both encoder and decoder and they are statistically close to the actual filters used in the video sequence, the decoder can reconstruct the pixel values based on the set of difference values.

摘要翻译： 提供了一种用于对每个具有像素值阵列的视频帧序列进行编码的视频编码系统。 该系统包括用于重建用于帧间预测处理的子像素值的内插滤波器。 相对于预定义的基本滤波器，内插滤波器的系数被差分地获得，以便提供一组差值。 由于编码器和解码器都知道基本滤波器系数，并且它们在统计上接近视频序列中使用的实际滤波器，因此解码器可以基于差值集合来重建像素值。

公开(公告)号：US06738423B1

公开(公告)日：2004-05-18

申请号：US09489543

申请日：2000-01-21

申请人： Jani Lainema ,  Marta Karczewicz

发明人： Jani Lainema ,  Marta Karczewicz

IPC分类号： H04N712

CPC分类号： H04N19/198 ,  H04N19/105 ,  H04N19/126 ,  H04N19/154 ,  H04N19/172 ,  H04N19/176 ,  H04N19/196 ,  H04N19/46 ,  H04N19/463 ,  H04N19/51 ,  H04N19/517 ,  H04N19/52 ,  H04N19/527 ,  H04N19/537 ,  H04N19/61

摘要： A motion compensated video coding method which can be applied especially in transfer of video streams using low transmission bit rate is presented. In the motion compensated coding method, the motion of picture elements between a piece of reference video information and a piece of current video information is estimated and then modeled using certain basis function and coefficients. The coefficients are quantized, and the quantizer is selected according to a certain selection criterion, for example, based on a target image quality or on a target transmission bit rate. Preferably the selection criterion is such that it automatically adjust the accuracy with which the motion of picture elements is represented to be related to the accuracy with which the prediction error information is represented. A decoding method, an encoder and a corresponding decoder are also described.

摘要翻译： 提出了一种运动补偿视频编码方法，其特别适用于使用低传输比特率的视频流的传输。 在运动补偿编码方法中，估计一条参考视频信息和一条当前视频信息之间的图像元素的运动，然后使用某些基函数和系数进行建模。 量化系数，并且根据某一选择标准（例如，基于目标图像质量或目标传输比特率）来选择量化器。 优选地，选择标准使得其自动调整图像元素的运动被表示为与表示预测误差信息的准确度相关的精度。 还描述了解码方法，编码器和对应的解码器。

公开(公告)号：US08175148B2

公开(公告)日：2012-05-08

申请号：US11881367

申请日：2007-07-26

申请人： Jani Lainema

发明人： Jani Lainema

IPC分类号： H04N7/12

CPC分类号： H04N19/463 ,  H04N19/126 ,  H04N19/136 ,  H04N19/174 ,  H04N19/196 ,  H04N19/61 ,  H04N19/70

摘要： A method and device for coding of digital video sequence, wherein an indication of quantization parameter (QP) is provided in the encoded bit-stream for decoding purposes. The QP related information is indicated by introducing a sequence level quantization parameter value SQP. More specifically, instead of coding the absolute values of picture/slice QPs, an indication of the difference ΔQP between the sequence level quantization parameter SQP and the picture/slice QP is provided. This eliminates the need to transmit a full QP for every picture/slice, and enables a statistically smaller difference value to be transmitted, thus providing a reduction in transmission bit-rate. The difference value is subsequently used in a corresponding decoder to reconstruct the picture/slice QP.

摘要翻译： 一种用于编码数字视频序列的方法和装置，其中在编码比特流中提供量化参数（QP）的指示以进行解码。 通过引入序列级量化参数值SQP来指示QP相关信息。 更具体地，代替对图片/片段QP的绝对值进行编码，提供了序列级量化参数SQP和图片/片段QP之间的差值Dgr; QP的指示。 这消除了为每个图像/片段发送完整QP的需要，并且能够传输统计上更小的差值，从而提供传输比特率的降低。 随后在对应的解码器中使用差值来重建图像/片段QP。

公开(公告)号：US08005145B2

公开(公告)日：2011-08-23

申请号：US10885256

申请日：2004-07-06

申请人： Jani Lainema

发明人： Jani Lainema

IPC分类号： H04N7/12

CPC分类号： H04N19/52

摘要： A method of coding video frames in a telecommunication system, comprising: forming a video frame of consecutive stationary frames, storing the frame reconstruction data of at least one frame as a reference frame and the motion data of earlier coded neighboring blocks, defining by means of the motion data of one or more earlier coded neighboring blocks the motion data of the block to be coded, which neighboring block is formed by means of the stored reference frame, defining the frame reconstruction data of the frame to be coded, selecting for use the frame reconstruction data and motion data representing the block to be coded, which provide a pre-defined coding efficiency with a predefined picture quality.

摘要翻译： 一种在电信系统中对视频帧进行编码的方法，包括：形成连续静止帧的视频帧，将至少一帧的帧重构数据存储为参考帧，以及先前编码的相邻块的运动数据，通过 一个或多个先前编码的相邻块的运动数据是要被编码的块的运动数据，该相邻块通过存储的参考帧形成，定义要编码的帧的帧重构数据，选择使用 帧重建数据和表示要编码的块的运动数据，其提供具有预定图像质量的预定义编码效率。

公开(公告)号：US20080260270A1

公开(公告)日：2008-10-23

申请号：US12101019

申请日：2008-04-10

申请人： Jani Lainema

发明人： Jani Lainema

IPC分类号： G06K9/36

CPC分类号： H04N19/85 ,  H04N19/122 ,  H04N19/61 ,  H04N19/80

摘要： A system and method for improving prediction error coding performance of various video compression algorithms. Various embodiments combine the energy compaction features of transform coding with localization properties of spatial coding. In various embodiments, the effects of pixel “outliers” are removed from the transform and are coded separately as a spatially coded pixel prediction, thereby improving the coding gain of the transform.

摘要翻译： 一种用于改进各种视频压缩算法的预测误差编码性能的系统和方法。 各种实施例将变换编码的能量压缩特征与空间编码的定位特性组合。 在各种实施例中，从变换中去除像素“异常值”的影响，并且作为空间编码像素预测分开编码，从而提高变换的编码增益。

公开(公告)号：US07200174B2

公开(公告)日：2007-04-03

申请号：US10440841

申请日：2003-05-19

申请人： Jani Lainema ,  Marta Karczewicz

发明人： Jani Lainema ,  Marta Karczewicz

IPC分类号： H04B1/66 ,  H04N7/12

CPC分类号： H04N19/521 ,  G06T7/223 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/53 ,  H04N19/543 ,  H04N19/557 ,  H04N19/56

摘要： A motion estimation method and system for a video coder are disclosed. The system comprises an input for a video image to be coded. It also comprises a hierarchical series of motion estimators of varying complexity, for estimating a motion vector field between the received image and a reference image. The subsequent motion estimator in the series is selected by a control means if a prediction error associated with the motion vector field estimated by the currently selected motion estimator exceeds a predetermined threshold. When available, inherited and predicted motion information is used to improve prediction quality.

摘要翻译： 公开了一种用于视频编码器的运动估计方法和系统。 该系统包括用于要编码的视频图像的输入。 它还包括具有不同复杂度的运动估计器的分级系列，用于估计接收图像和参考图像之间的运动矢量场。 如果与由当前选择的运动估计器估计的运动矢量场相关联的预测误差超过预定阈值，则由控制装置选择该系列中的后续运动估计器。 当可用时，继承和预测运动信息用于提高预测质量。

公开(公告)号：US06735249B1

公开(公告)日：2004-05-11

申请号：US09371641

申请日：1999-08-11

申请人： Marta Karczewicz ,  Jani Lainema ,  Bogdan-Paul Dobrin

发明人： Marta Karczewicz ,  Jani Lainema ,  Bogdan-Paul Dobrin

IPC分类号： H04B166

CPC分类号： H04N19/517 ,  H04N19/147 ,  H04N19/19 ,  H04N19/46 ,  H04N19/543 ,  H04N19/567

摘要： Apparatus, and an associated method, motion compensates coding of video sequences. Motion compensated prediction is utilized in the representation of motion vector fields. Reduced numbers of bits are required to represent the motion vector field while maintaining a low prediction error, thereby facilitating improved communication of, and recreation of, video frames forming a video sequence.

摘要翻译： 装置和相关联的方法，运动补偿视频序列的编码。 运动补偿预测用于运动矢量场的表示。 需要减少位数来表示运动矢量场，同时维持低预测误差，从而有助于改进形成视频序列的视频帧的通信和娱乐。

公开(公告)号：US06711209B1

公开(公告)日：2004-03-23

申请号：US09489327

申请日：2000-01-21

申请人： Jani Lainema ,  Marta Karczewicz

发明人： Jani Lainema ,  Marta Karczewicz

IPC分类号： H04B166

CPC分类号： H04N19/517 ,  H04N19/147 ,  H04N19/19 ,  H04N19/46 ,  H04N19/543 ,  H04N19/567

摘要： A method for motion compensated encoding of video data. The method comprises the steps of: generating a motion vector field of video pixels of a current frame to be coded based on a reference frame; obtaining segmenting information defining the division of the current frame into image segments; coding the motion vector field of an image segment Sk to provide compressed motion information comprising a motion coefficient vector ck comprising a set of motion coefficients ci, such that ci·fi(x,y) represents the motion vector field, whereby fi(x,y) defines a certain set of basis functions, wherein i is an index defining a correspondence between each basis function and a corresponding motion coefficient; predicting a motion vector field of a subsequent image segment SL with a set of predicted motion coefficients pi based upon the previously generated motion coefficient vector ck; generating for the subsequent segment SL a set of refinement motion coefficients ri corresponding to the difference between the set of motion coefficients ci and a set of predicted motion coefficients pi such that pi+ri=ci. Another aspects of the invention comprise corresponding video codec, mobile station, telecommunications network and computer program product.

摘要翻译： 一种用于视频数据的运动补偿编码的方法。 该方法包括以下步骤：基于参考帧产生要编码的当前帧的视频像素的运动矢量场;获得定义将当前帧划分成图像段的分割信息;对图像的运动矢量场进行编码 段Sk以提供包括运动系数向量ck的压缩运动信息，运动系数向量ck包括一组运动系数ci，使得ci.fi（x，y）表示运动矢量场，由此fi（x，y）定义一组基础 函数，其中i是定义每个基函数和相应运动系数之间的对应关系的索引;基于先前产生的运动系数向量ck，利用一组预测的运动系数pi来预测后续图像段SL的运动矢量场;产生 对于随后的段SL，对应于运动系数集合ci和一组预先的一组的细化运动系数ri 被测运动系数pi使得pi + ri = ci。本发明的另一方面包括对应的视频编解码器，移动台，电信网络和计算机程序产品。

公开(公告)号：US06526096B2

公开(公告)日：2003-02-25

申请号：US08934307

申请日：1997-09-19

申请人： Jani Lainema ,  Marta Karczewicz ,  Levent Oktem

发明人： Jani Lainema ,  Marta Karczewicz ,  Levent Oktem

IPC分类号： H04N712

CPC分类号： H04N19/567 ,  H04N19/147 ,  H04N19/53 ,  H04N19/537 ,  H04N19/80

摘要： A motion estimation system for a video coder has an input for a video image to be coded, and includes a series of motion estimators of varying complexity for estimating a motion vector field between a received image and a reference image. The estimation is accomplished by sequential use of the estimators, wherein a subsequent estimator of the sequence is selected by a controller based on a prediction error, associated with the motion vector field estimated by a currently selected estimator, exceeding a predetermined threshold.

摘要翻译： 视频编码器的运动估计系统具有用于要编码的视频图像的输入，并且包括用于估计接收图像和参考图像之间的运动矢量场的不同复杂度的一系列运动估计器。 估计是通过顺序使用估计器完成的，其中控制器基于与由当前选择的估计器估计的运动矢量场相关联的预测误差超过预定阈值来选择序列的后续估计器。

公开(公告)号：US07388996B2

公开(公告)日：2008-06-17

申请号：US09766238

申请日：2001-01-19

申请人： Jani Lainema ,  Bogdan-Paul Dobrin ,  Marta Karczewicz

发明人： Jani Lainema ,  Bogdan-Paul Dobrin ,  Marta Karczewicz

IPC分类号： G06K9/40 ,  G06K9/46 ,  H04N7/12

CPC分类号： H04N19/527 ,  H04N19/86 ,  H04N19/895

摘要： The invention relates to a method for reducing visual artefacts in a digital image, which is coded by blocks (B1, B2, B3, B4) and then decoded. In the method filtering is performed to reduce visual artefacts due to a boundary (R12, R13, R24, R34) between a current block and an adjacent block (B1, B2, B3, B4). The filtering is performed after the current block (B1, B2, B3, B4) is decoded and there is a boundary available for filtering between the current block and a previously decoded block.

摘要翻译： 本发明涉及一种用于减少由块（B 1，B 2，B 3，B 4）编码然后被解码的数字图像中的视觉伪影的方法。 在该方法中，执行滤波以减少由于当前块和相邻块（B 1，B 2，B 3，B 4）之间的边界（R 12，R 13，R 24，R 34）引起的视觉伪影。 在当前块（B 1，B 2，B 3，B 4）被解码之后执行滤波，并且存在可用于在当前块和先前解码块之间进行滤波的边界。