公开(公告)号：EP1455536A1

公开(公告)日：2004-09-08

申请号：EP04012419.0

申请日：1997-07-08

申请人： FUJITSU LIMITED

发明人： Nakagawa, Akira ,  Kazui, Kimihiko ,  Morimatsu, Eishi ,  Shimizu, Takahiro

IPC分类号： H04N7/50 ,  G06T9/00

CPC分类号： H04N19/59 ,  H04N19/105 ,  H04N19/117 ,  H04N19/134 ,  H04N19/139 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/527 ,  H04N19/61 ,  H04N19/82 ,  H04N19/86

摘要： Video coding apparatus and decoding apparatus capable of reproducing decoded pictures without introducing unwanted noises, even if any considerable difference in pixel values or discontinuity exists at a certain block boundary. In a video coding apparatus employing predictive techniques, a dequantizer and an inverse DCT processor reproduce a prediction error signal from quantized transform coefficients. Here, a first resolution conversion unit (or downsampling unit) might have subsampled the original prediction error signal to reduce its picture resolution. If this is the case, a second resolution conversion unit (or upsampling unit) attempts to restore the original resolution of the prediction error signal by applying an upsampling process to the reproduced prediction error signal having the reduced resolution. In this upsampling process, each new pixel value in a certain block are calculated with reference to some surrounding pixels. The upsampling process, however, will not refer to the pixels belonging to any adjacent blocks that are subject to another coding scheme which is different from the coding scheme of the present block of interest. As an alternate arrangement, the upsampling process will entirely neglect the pixels in any other blocks but will refer only to the present block.

摘要翻译： 即使在某个块边界处存在像素值或不连续性的任何相当大的差异，也能够再现解码图像而不引入不需要的噪声的视频编码装置和解码装置。 在采用预测技术的视频编码装置中，去量化器和逆DCT处理器从量化变换系数再现预测误差信号。 这里，第一分辨率转换单元（或下采样单元）可以对原始预测误差信号进行二次采样以降低其图像分辨率。 如果是这种情况，则第二分辨率转换单元（或上采样单元）尝试通过对具有降低的分辨率的再现预测误差信号应用上采样处理来恢复预测误差信号的原始分辨率。 在该上采样处理中，参考一些周围像素来计算某个块中的每个新像素值。 然而，上采样处理将不指代属于与当前感兴趣块的编码方案不同的另一编码方案的属于任何相邻块的像素。 作为替代布置，上采样处理将完全忽略任何其它块中的像素，但将仅引用当前块。

公开(公告)号：EP0860984A2

公开(公告)日：1998-08-26

申请号：EP97117824.9

申请日：1997-10-15

申请人： FUJITSU LIMITED

发明人： Nakagawa, Akira ,  Kazui, Kimihiko ,  Tada, Atsuko ,  Morimatsu, Eishi ,  Tanaka, Koich

IPC分类号： H04N1/32

CPC分类号： H04N19/467 ,  G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0083 ,  H04N1/32154 ,  H04N1/32165 ,  H04N21/23892 ,  H04N21/8358 ,  H04N2201/3233 ,  H04N2201/327

摘要： The present invention relates to methods for watermark-embedding/extracting identification information into/from picture data and apparatuses thereof. When identification information is watermark-embedded, the following steps are performed. Combinations of basis functions orthogonal each other are generated in association with each numerical signal. For each combination of the orthogonal basis functions, a weight coefficient is calculated so as to correspond to the combination of the basis functions by calculating a sum of products of values of the basis functions for pixels in the original picture data and pixel values of the pixels. For each numerical signal, a watermark-embedding function is referred, a input value is specified, and a pixel value is changed. When the identification information is extracted from the picture data, for each weight coefficient, the watermark-embedding function is referred, and the value of the watermark-embedding function is calculated for each weight coefficient.

摘要翻译： 本发明涉及一种用于水印嵌入/提取方法识别信息插入从图像数据和装置及其/。 当识别信息是埋置水印，执行以下步骤。 的基础功能的组合相互正交的在与各数字信号关联生成。 为的正交基函数的每个组合，权重系数的计算方法，从而通过在像素的原始图像数据和像素值计算的基础函数的值的乘积之和为像素，以对应于基函数的组合 ， 对于每一个数字信号，水印嵌入功能被称为，一个输入值中指定，和像素值被改变。 当识别信息被从图像数据中提取，对于每个权重系数，所述水印嵌入函数由称为，并且水印嵌入函数的值计算每个加权系数。

公开(公告)号：EP3641314A1

公开(公告)日：2020-04-22

申请号：EP19215563.8

申请日：2013-01-16

申请人： FUJITSU LIMITED

发明人： Shimada, Satoshi ,  Kazui, Kimihiko ,  Koyama, Junpei ,  Nakagawa, Akira

IPC分类号： H04N19/124 ,  H04N19/436 ,  H04N19/463 ,  H04N19/593

摘要： The present disclosure relates to a video decoder for decoding a stream encoded with a video encoding system, the encoded stream being obtained by encoding an image of a plurality of divided blocks. The video decoder comprises a parallel entropy decoding part, a parallel QP prediction part and a parallel decoding processing part. The parallel decoding processing part computes the quantization parameter of the processing block in the Kth block line based on the prediction value computed by the parallel QP prediction part, and performs deblocking filter processing for the processing block in the Kth block line by using the computed quantization parameter.

公开(公告)号：EP3641313A1

公开(公告)日：2020-04-22

申请号：EP19215562.0

申请日：2013-01-16

申请人： FUJITSU LIMITED

发明人： Shimada, Satoshi ,  Kazui, Kimihiko ,  Koyama, Junpei ,  Nakagawa, Akira

IPC分类号： H04N19/124 ,  H04N19/436 ,  H04N19/463 ,  H04N19/593

摘要： The present disclosure relates to a video decoding method executed by a video decoder, the video decoder decoding a stream encoded with a video encoding system, the encoded stream being obtained by encoding an image of a plurality of divided blocks. The video decoding method comprises entropy decoding the stream of the blocks contained in block lines, computing prediction values of quantization parameters of the blocks contained in the block lines, and generating decoded pixels with respect to the blocks contained in the block lines. The quantization parameter of the processing block in the Kth block line is computed based on the computed prediction value, and deblocking filter processing is performed for the processing block in the Kth block line by using the computed quantization parameter.

公开(公告)号：EP3151556B1

公开(公告)日：2019-02-13

申请号：EP16198143.6

申请日：2012-05-23

申请人： FUJITSU LIMITED

发明人： Shimada, Satoshi ,  Nakagawa, Akira ,  Kazui, Kimihiko ,  Koyama, Junpei

IPC分类号： H04N19/105 ,  H04N19/52 ,  H04N19/503 ,  H04N19/176 ,  H04N19/33 ,  H04N19/31 ,  H04N19/577

公开(公告)号：EP3151557A1

公开(公告)日：2017-04-05

申请号：EP16198144.4

申请日：2012-05-23

申请人： FUJITSU LIMITED

发明人： Shimada, Satoshi ,  Nakagawa, Akira ,  Kazui, Kimihiko ,  Koyama, Junpei

IPC分类号： H04N19/105 ,  H04N19/52 ,  H04N19/503 ,  H04N19/176 ,  H04N19/33 ,  H04N19/31 ,  H04N19/577

CPC分类号： H04N19/52 ,  H04N19/103 ,  H04N19/105 ,  H04N19/176 ,  H04N19/31 ,  H04N19/33 ,  H04N19/503 ,  H04N19/51 ,  H04N19/521 ,  H04N19/543 ,  H04N19/577 ,  H04N19/587

摘要： A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount.

摘要翻译： 视频解码装置包括：参考图像列表存储单元，被配置为存储图像的图像信息; 运动矢量信息存储单元，被配置为存储运动矢量信息，所述运动矢量信息包括与要解码的目标块空间和时间相邻的块的运动矢量，以及指示运动矢量所参照的图像的参考图像标识符; 以及矢量预测器生成单元，被配置为基于所述图像信息和所述运动矢量信息来缩放所述目标块的运动矢量的矢量预测器候选，并将所述经缩放的矢量预测器候选朝0校正预定量。

公开(公告)号：EP2178301B1

公开(公告)日：2015-11-25

申请号：EP09173131.5

申请日：2009-10-15

申请人： FUJITSU LIMITED

发明人： Kazui, Kimihiko ,  Terashima, Yoshihiro ,  Tsukuda, Noriaki ,  Nakagawa, Akira

IPC分类号： H04N19/139 ,  H04N19/176 ,  H04N19/40 ,  H04N19/433 ,  H04N19/56 ,  H04N19/61

CPC分类号： H04N19/40 ,  H04N19/139 ,  H04N19/176 ,  H04N19/433 ,  H04N19/56 ,  H04N19/61

公开(公告)号：EP2658257A2

公开(公告)日：2013-10-30

申请号：EP13164068.2

申请日：2013-04-17

申请人： FUJITSU LIMITED

发明人： Koyama, Junpei ,  Kazui, Kimihiko ,  Shimada, Satoshi ,  Nakagawa, Akira

IPC分类号： H04N7/26

CPC分类号： H04N19/124 ,  H04N19/00 ,  H04N19/115 ,  H04N19/13 ,  H04N19/146 ,  H04N19/152 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/44 ,  H04N19/46

摘要： A method includes determining a group to which each block belongs, the blocks being obtained by dividing each picture included in video image data; adding, to an output stream, information of groups including blocks; calculating a decode time for groups and adding the decode time to the output stream; calculating a display time for the groups and adding the display time to the output stream; controlling an encode amount so that data used for decoding all of the blocks included in a group arrives at a receiving buffer of a decoding device by the display time; encoding based on the controlled encode amount; and implementing control so that first data in a next picture does not arrive at the receiving buffer by the display time, when the data used for decoding all blocks in a group does not arrive at the receiving buffer by the display time.

公开(公告)号：EP2046050A3

公开(公告)日：2012-01-25

申请号：EP08160137.9

申请日：2008-07-10

申请人： Fujitsu Limited

发明人： Nakagawa, Akira ,  Miyoshi, Hidenobu ,  Kazui, Kimihiko ,  Kimura, Hisanari

IPC分类号： H04N7/50

CPC分类号： H04N19/55 ,  H04N19/105 ,  H04N19/107 ,  H04N19/16 ,  H04N19/17 ,  H04N19/174 ,  H04N19/186 ,  H04N19/523

摘要： A moving-picture coding device that performs inter-field motion compensation prediction, includes a reference limit area determining unit that determines to select, for each reference picture, with respect to reference pictures used for coding, a luminance or chrominance reference limit area putting a limit to a reference picture used for generating a prediction picture of a luminance or chrominance of a coding target block belonging to the coding target picture limit area of the case upon each reference picture being previously coded; a selecting inhibit vector determining unit that determines, in a case of coding the coding block belonging to the coding target picture limit area, a selecting inhibit vector that inhibits selecting a luminance and the chrominance are comprised only of pixels of the luminance reference limit area and the chrominance reference limit area.

摘要翻译： 一种运动图像编码装置的确执行场间运动补偿预测中，包括参考限制区域确定性挖掘单元没有确定性地雷选择，对于每个参考图片，相对于参考用于编码画面，把一个亮度或色度参考限制区域一 限制到用于产生属于在每个参考图片之前被编码的情况的编码目标图片限制区域的编码目标块的亮度或色度的预测图像的参考图像; 一个选择禁止矢量确定性挖掘单元做确定性矿山，在编码属于编码目标图片限制区域的编码块的情况下，选择禁止矢量确实抑制选择的亮度和色度分别是仅由亮度参考限制区域的像素和 色度参考限制区域。

公开(公告)号：EP2099223A3

公开(公告)日：2009-12-23

申请号：EP09154528.5

申请日：2009-03-06

申请人： Fujitsu Limited

发明人： Nakagawa, Akira ,  Kobayashi, Shunsuke

IPC分类号： H04N7/26 ,  H04N9/64

CPC分类号： H04N9/642 ,  H04N19/103 ,  H04N19/122 ,  H04N19/16 ,  H04N19/167 ,  H04N19/174 ,  H04N19/63 ,  H04N19/635

摘要： An decomposition filter(670) includes a top-field low-frequency decomposition filter (610) and a bottom-field low-frequency decomposition filter (611) whose coefficient is obtained by vertically inverting the coefficient of the top-field low-frequency decomposition filter. It also includes a top-field high- frequency decomposition filter (620) and a bottom-field high-frequency decomposition filter (621) whose coefficient is obtained by vertically inverting the coefficient of the top-field high-frequency decomposition filter. The above-described filters are switched and used according to which an input signal is for, a top-field or a bottom-field.