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公开(公告)号：EP3211538A4
公开(公告)日：2018-01-17
申请号：EP15891447
申请日：2015-05-08
申请人： HUAWEI TECH CO LTD
发明人： ZHUANG LIANG , YANG GANGHUA , LIANG WENLIANG
CPC分类号： H03H17/0213 , G06F17/14 , G06F17/142 , G06F17/147 , H03H17/0202 , H03H2017/0214
摘要： Embodiments of the present invention provide a signal processing method and apparatus. The method includes: performing M-way filtering on an input signal to obtain M filtered signals, performing extraction on M filtered signals separately to obtain M extracted signals, performing fast Fourier transform FFT on the M extracted signals separately to obtain M frequency-domain signals, and finally determining output signals according to the M frequency-domain signals. According to the embodiments of the present invention, signal filtering and extraction are performed and then FFT is performed. In this way, computation complexity can be reduced.
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公开(公告)号：EP1396081A2
公开(公告)日：2004-03-10
申请号：EP02725662.7
申请日：2002-04-12
申请人： INTEL CORPORATION
发明人： ACHARYA, Tinku
CPC分类号： H03H17/0202
摘要： Embodiments of a two-dimensional pyramid filter architecture are described.
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公开(公告)号：EP0842586B1
公开(公告)日：2000-08-16
申请号：EP96917250.1
申请日：1996-06-05
申请人： POLAROID CORPORATION
发明人： REISCH, Michael, L.
IPC分类号： H04N7/30
CPC分类号： H03H17/0202 , H04N19/124 , H04N19/126 , H04N19/48 , H04N19/527 , H04N19/60 , H04N19/80 , H04N19/86 , H04N19/90
摘要： A system for filtering an image during data compression using a standard JPEG compression/decompression chip typically requires a separate spatial filter external to the chip. The spatial filter is composed of numerous shift registers, flip-flops, multipliers and at least one adder. In contrast, an image filtering system which filters in the frequency domain using the inventive JPEG compression chip modified for filtering in the frequency domain does not require the separate spatial filter and its many components. The modified JPEG chip includes a raster to block converter which converts an image signal into 8x8 blocks, a DCT processor which converts the 8x8 blocks into DCT coefficients, a multiplier which generates filtered DCT coefficients by multiplying predetermined filtering coefficients times the DCT coefficients, a quantizer which generates quantized blocks to a predetermined level stored in a visibility table by quantizing the filtered coefficients, a zigzag scanner which generates a vector having the same number of elements as the quantized blocks, a run-length coder for determining the appropriate run-length according to entropy encoding received from a preloaded Huffman table, and a variable length code packer/unpacker for compressing the entropy encoded vector. A block to raster converter is included to reformat decompressed data.
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公开(公告)号：EP0818886A3
公开(公告)日：1999-12-01
申请号：EP97109619.3
申请日：1997-06-13
申请人： ROBERT BOSCH GMBH
发明人： Göckler, Heinz
IPC分类号： H03H17/02
CPC分类号： H03H17/0202
摘要： Die Erfindung betrifft eine umschaltbare Frequenzweiche, die aus zwei Einzelfiltern besteht, deren Mittenfrequenz f m =(2m-1) f a /8 , mit m=1,2,3,4 gewählt sind. Sie zeichnet sich insbesondere dadurch aus, daß durch Ändern von Vorzeichen einiger weniger Verknüpfungseinrichtungen das Durchlaßband der Filterübertragungsfunktion in einen anderen Frequenzbereich verschiebbar ist.
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公开(公告)号：EP0527693B1
公开(公告)日：1996-03-27
申请号：EP92420271.6
申请日：1992-08-05
发明人： Harrand, Michel
CPC分类号： H04N19/80 , H03H17/0202
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公开(公告)号：EP0589220A2
公开(公告)日：1994-03-30
申请号：EP93113484.5
申请日：1993-08-24
IPC分类号： H04N7/13
CPC分类号： H03H17/0202 , H04N5/14 , H04N19/61 , H04N19/80 , H04N19/85
摘要： A video signal encoder uses an encoding system such as that developed by the Moving Picture Experts Group (MPEG). Apparatus according to the present invention filters out high diagonal frequencies in the spatial domain of a video signal. Specifically, two dimensional (2-D) filtering is performed on frames of a video signal to filter out high diagonal spatial frequencies before the video signal is separated into blocks. These blocks may be encoded in fewer bits due to the elimination of image components having high diagonal frequencies.
摘要翻译： 视频信号编码器使用诸如由运动图像专家组（MPEG）开发的编码系统。 根据本发明的设备滤除视频信号的空间域中的高对角线频率。 具体而言，在视频信号的帧上执行二维（2-D）滤波以在将视频信号分成块之前滤除高对角空间频率。 由于消除了具有高对角线频率的图像分量，这些块可以用较少的比特进行编码。
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7.发明公开
公开(公告)号：EP0544356A3
公开(公告)日：1994-02-09
申请号：EP92203544.9
申请日：1992-11-18
发明人： Bruekers, Alphons Antonius Maria Lambertus , Van den Enden, Adrianus Wilhelmus Maria , Tolhuizen, Ludovicus Marinus Gerardus Maria
IPC分类号： G06F15/332 , G06F15/347 , G06F15/324
CPC分类号： G06F17/147 , H03H17/0202 , H04B1/667 , H04N19/60 , H04N19/635
摘要： A one-dimensional forward transform and a one-dimensional inverse transform which can be used for, for example, picture transform coding but also for subband coding. The matrix based on this transform is decomposed. This means that it is written as a product of permutation matrices and triangular matrices. A permutation matrix is implemented in a permutation circuit and a triangular matrix is implemented in a triangular circuit so that the forward transform is realised by means of a cascade arrangement of permutation circuits and triangular circuits. The transform thereby realised is perfectly invertible.
摘要翻译： 一维正向变换和一维逆变换可以用于例如图像变换编码，也可以用于子带编码。 基于这个变换的矩阵被分解。 这意味着它被写成置换矩阵和三角矩阵的乘积。 在置换电路中实现置换矩阵，并且在三角形电路中实现三角矩阵，从而通过置换电路和三角电路的级联布置来实现正向变换。 由此实现的转换是完全可逆的。
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公开(公告)号：EP0527693A1
公开(公告)日：1993-02-17
申请号：EP92420271.6
申请日：1992-08-05
发明人： Harrand, Michel
CPC分类号： H04N19/80 , H03H17/0202
摘要： L'invention concerne un filtre bidimensionnel à réponse impulsionnelle finie d'ordre 2p+1 pour le traitement de données associant un filtre "vertical " (16) et un filtre " horizontal" (18), chaque filtre comportant 2p+1 cellules et des moyens pour balayer verticalement les données par bandes d'une hauteur de p données ; des moyens (11, 12, 14) pour fournir simultanément sur une première ligne (C) une donnée d'une bande, sur une deuxième ligne (B) une donnée de la bande précédente décalée de p données, sur une troisième ligne (A) une donnée de la bande encore précédente décalée encore de p données ; et des moyens pour, à chaque temps d'horloge, connecter chaque entrée de cellule à l'une desdites trois lignes.
摘要翻译： 本发明涉及一种组合“垂直”滤波器（16）和“水平”滤波器（18））的数据处理的2p + 1阶二维有限脉冲响应滤波器，每个滤波器包含2p + 1个单元和用于扫描的装置 该数据垂直地具有高度为p数据的带; 用于在第一行（C）上同时提供来自在第三行（A）a上的来自前一频带被p数据移位的第二行（B））来自频带的数据的第二行（B）基准的数据的装置（11,12,14） 来自先前但一个频带的数据移位另一个p数据; 以及用于在每个时钟行程上将每个单元输入连接到所述三条线之一的装置。 ...
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公开(公告)号：EP0218241A2
公开(公告)日：1987-04-15
申请号：EP86113923.6
申请日：1986-10-08
发明人： Faroudja, Yves C.
CPC分类号： H04N9/78 , H03H17/0202 , H03H2017/0204
摘要： A multi-dimensional comb filter system for processing e.g. a quadrature modulated color television signal includes an input for receiving the signal; a first comb filter operating at the first period (such as the picture frame rate); and, a second comb filter operating at the second period (such as the picture line rate) connected in tandem with the first comb filter. A delay matching network is connected to the input and provides a delay to the original signal corresponding to the sum of the first period and the second period. A linear adder circuit is connected to the second comb filter ans to the delay matching network for combining in phase the delayed signal passing through the delay matching network and the signal put out by the second comb filter. The adder circuit includes an output for putting out the signal which has been separated by multi-dimensional comb filtering of the original signal without any process adaptivity or switching in response to the content of the original signal.
摘要翻译： 一种用于处理的多维梳状滤波器系统。 正交调制彩色电视信号包括用于接收信号的输入端; 在第一时段操作的第一梳状滤波器（诸如图像帧速率）; 以及在与第一梳状滤波器串联连接的第二周期（例如图像线速率）下操作的第二梳状滤波器。 延迟匹配网络连接到输入，并且对与第一周期和第二周期的和相对应的原始信号提供延迟。 线性加法器电路连接到第二梳状滤波器ans到延迟匹配网络，用于将通过延迟匹配网络的延迟信号和由第二梳状滤波器输出的信号同相进行组合。 加法器电路包括用于输出已经通过原始信号的多维梳状滤波分离的信号的输出，而没有任何过程自适应或响应于原始信号的内容的切换。
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公开(公告)号：EP0045596A2
公开(公告)日：1982-02-10
申请号：EP81303377.6
申请日：1981-07-23
申请人： XEROX CORPORATION
发明人： D'Ortenzio, Remo J,
摘要： separable two dimensional Finite Impulse Response (FIR) digital image processing filter with X-dimension filter section having a delay buffer series to which digitized image signals or pixels are first input. The buffer inputs and output are tapped and pixels tapped off are processed by preset multiplier factors and input to an adder where the processed pixels are summed. The summed pixels are fed to a line buffer series of a Y-dimension filter section, tapped off from the filter inputs and output, and processed by further preset multiplier factors. The processed pixels are input to a second adder and summed to provide filtered output pixels.
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