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公开(公告)号：US5384869A
公开(公告)日：1995-01-24
申请号：US957159
申请日：1992-10-07
CPC分类号： G06F17/175 , H03H17/0202 , H04N19/122 , H04N19/186 , H04N19/635
摘要： Image processing apparatus is described for filtering a digital representation of a raster scanned image into a plurality of sub-bands in the two-dimensional spatial frequency domain, the resolution of the raster scanned image in a first direction (usually the horizontal direction) being greater than the resolution of the raster scanned image in a second direction (usually the vertical direction). The image processing apparatus has a decimation filter means comprising a number of multi-tap digital decimation filters for spatial filtering in the first and second directions. The mean of the filter lengths of the filters used for filtering in the first direction is greater than that of the filters used for filtering in the second direction. Complementary interpolation apparatus for reconstructing the image from the plurality of sub-bands is also described.
摘要翻译： 描述了图像处理装置，用于将光栅扫描图像的数字表示滤波成二维空间频域中的多个子带，光栅扫描图像在第一方向（通常为水平方向）上的分辨率更大 比在第二方向（通常是垂直方向）的光栅扫描图像的分辨率。 图像处理装置具有抽取滤波器装置，其包括多个用于在第一和第二方向上进行空间滤波的多抽头数字抽取滤波器。 用于在第一方向上过滤的滤波器的滤波器长度的平均值大于用于在第二方向上进行滤波的滤波器的滤波器长度的平均值。 还描述了用于从多个子带重建图像的互补插值装置。
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2.发明授权Digital signal recording and/or reproducing apparatus that evenly distributes field data across tracks 失效数字信号记录和/或再现装置，其在轨道上均匀地分配场数据
公开(公告)号：US5506687A
公开(公告)日：1996-04-09
申请号：US286386
申请日：1994-08-04
申请人： Clive H. Gillard , James H. Wilkinson , Michael J. Ludgate , Jonathan M. Soloff , Rajan Bhandari , Terence R. Hurley
发明人： Clive H. Gillard , James H. Wilkinson , Michael J. Ludgate , Jonathan M. Soloff , Rajan Bhandari , Terence R. Hurley
IPC分类号： G11B20/12 , B82B1/00 , H04N5/7826 , H04N5/92 , H04N5/926 , H04N7/24 , H04N9/797 , H04N9/80 , H04N9/804 , H04N9/808 , H04N9/88 , H04N9/888 , H04N9/79 , G11B5/02
CPC分类号： H04N5/926 , H04N5/78266 , H04N9/7973 , H04N9/8042 , H04N9/888 , H04N2009/8084
摘要： A digital video tape recording/playback system having a plurality of recording heads (A, B, C, D) on a rotating head mechanism 94 for recording slanting tracks 108 which extend diagonally across a tape 82 provides processing of video signals in a plurality of data processing channels with selective connection of the data processing channels to the recording heads such that data from a plurality of data processing channels are stored in respective portions of a slanting track (A+/A-; B+/B-; C+/C-; D+/D-). The data in each data processing channel and recorded in each track portion is sampled with a substantially even distribution over a field of video signals to provide for effective concealment of recording/playback errors. Preferably, two data processing channels are recorded on each track, the respective portions being located in upper and lower portions of the tape, respectively.
摘要翻译： 一种在旋转磁头机构94上具有多个记录头（A，B，C，D）的数字录像带记录/重放系统，用于记录沿着磁带82斜对角延伸的倾斜磁道108， 数据处理通道，数据处理通道选择性地连接到记录头，使得来自多个数据处理通道的数据被存储在倾斜磁道的相应部分（A + / A-; B + / B-; C + / C-; D + / D-）。 每个数据处理通道中记录在每个磁道部分中的数据在视频信号的场上以基本均匀的分布进行采样，以提供有效的隐藏记录/重放错误。 优选地，在每个轨道上记录两个数据处理通道，各个部分分别位于磁带的上部和下部。
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公开(公告)号：US5268905A
公开(公告)日：1993-12-07
申请号：US885863
申请日：1992-05-20
CPC分类号： H03H17/0664 , H03H17/0266
摘要： A sub-band filter system in which the frequency separated data is multiplexed together at the output of each filter stage. The stream of multiplexed data produced can have a block-by-block format or a sample-by-sample format. In the latter case, the filtering can be effected by a finite impulse response filter with switchable tap coefficients for effecting both decimation and high and low pass filtering.
摘要翻译： 频带分离数据在每个滤波器级的输出端被多路复用的子带滤波器系统。 所生成的复用数据流可以具有逐块格式或逐个样本格式。 在后一种情况下，可以通过具有可切换抽头系数的有限脉冲响应滤波器来实现滤波，以实现抽取和高通和低通滤波。
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公开(公告)号：US5231487A
公开(公告)日：1993-07-27
申请号：US810335
申请日：1991-12-19
CPC分类号： G11B20/10 , G11B20/00007 , G11B20/1833 , H04N19/124 , H04N19/186 , H04N19/1883 , H04N19/50 , H04N19/61 , H04N19/63 , H04N19/102 , H04N19/13 , H04N19/65 , H04N19/89
摘要： Apparatus for storing a video signal includes a signal compression arrangement constituted by a spatial two-dimensional sub-band filtering arrangement that filters a digital video signal to form data sets constituting respective sub-bands of the two-dimensional spatial frequency domain, a quantizer that quantizes the data sets in accordance with respective values which are such that the amount of quantization of one of the data sets constituting a sub-band to which dc luminance information of the signal is at least predominantly confined is less than the average of the amounts of quantization of the remaining data sets, and an entropy encoder that selectively encodes at least some of the quantized data sets so that the quantized data sets, as selectively entropy encoded, form a compressed video signal. The signal compression arrangement is followed by a storage arrangement for storing the compressed video signal.
摘要翻译： 用于存储视频信号的装置包括由空间二维子带滤波装置构成的信号压缩装置，其对数字视频信号进行滤波以形成构成二维空间频域的各个子带的数据集;量化器， 根据相应的值量化数据集，这些值使得构成信号的直流亮度信息至少主要被限制的子带的数据组之一的量化量小于该信号的直流亮度信息至少主要被限制的子带的量化的量 剩余数据集的量化，以及选择性地编码至少一些量化数据集的熵编码器，使得作为选择性熵编码的量化数据集形成压缩视频信号。 信号压缩布置之后是用于存储压缩视频信号的存储装置。
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公开(公告)号：US5214502A
公开(公告)日：1993-05-25
申请号：US810337
申请日：1991-12-19
CPC分类号： H04N11/042 , H04N19/126 , H04N19/186 , H04N19/63 , H04N19/10 , H04N19/102
摘要： To enable a digital composite color video signal (NTSC or PAL) to be compressed directly, that is without dividing it into its components and compressing the components separately, the digital composite color video signal is decorrelated, for example by spatial sub-band filtering, to form data sets, for example sub-bands, representing dc luminance information, ac luminance information and dc chrominance information. The data sets are then quantized in accordance with respective quantization values from a quantization matrix, those quantization values being such that the amount of quantization of each of some of the data sets to which the dc luminance information and the dc chrominance information is at least predominantly confined is less than the average of the amounts of quantization of the remaining data sets. At least some of the quantized data sets are then entropy encoded.
摘要翻译： 为了使数字复合彩色视频信号（NTSC或PAL）能够被直接压缩，即不将其划分成其组件并分别压缩组件，数字复合彩色视频信号例如通过空间子带滤波去相关， 以形成表示直流亮度信息，交流亮度信息和直流色度信息的数据组，例如子带。 然后根据来自量化矩阵的相应量化值量化数据组，这些量化值使得直流亮度信息和直流色度信息至少主要地对数据集中的每一个的量化量 限制小于剩余数据集的量化量的平均值。 至少一些量化数据集然后被熵编码。
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公开(公告)号：US5491479A
公开(公告)日：1996-02-13
申请号：US114826
申请日：1993-09-02
申请人： James H. Wilkinson
发明人： James H. Wilkinson
IPC分类号： G06T9/00 , H04N5/783 , H04N5/926 , H04N7/26 , H04N7/30 , H04N7/34 , H04N7/66 , H04N9/804 , H03M7/00
CPC分类号： H04N9/8042 , H04N19/126 , H04N19/186 , H04N19/593 , H04N19/61 , H04N19/63 , H04N5/9264 , H04N19/10 , H04N19/115 , H04N19/124 , H04N19/13 , H04N19/146 , H04N19/60 , H04N5/783
摘要： Apparatus for decoding an input digital signal by replacing successive n-bit groups of the input digital signal with respective ones from an ensemble of m-bit data words, each m-bit data word having an associated n-bit code word, where n is greater than m, comprises: means for determining the Hamming distance between an n-bit group of the input digital signal and each of the n-bit code words associated with the ensemble of m-bit data words; and means for replacing that n-bit group of the input digital signal with an m-bit data word from the ensemble of m-bit data words for which the Hamming distance between the n-bit code word associated with that m-bit data word and that n-bit group is the lowest.
摘要翻译： 用于通过用m位数据字的整体代替输入数字信号的相继的n位组来解码输入数字信号的装置，每个m位数据字具有相关联的n位代码字，其中n是 大于m，包括：用于确定输入数字信号的n位组与与m位数据字的组合相关联的每个n位代码字之间的汉明距离的装置; 以及用于用来自与该m位数据字相关联的n位代码字之间的汉明距离的m位数据字的集合的m位数据字替换输入数字信号的n位组的装置 而n位组最低。
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公开(公告)号：US5473443A
公开(公告)日：1995-12-05
申请号：US67036
申请日：1993-05-26
申请人： James H. Wilkinson
发明人： James H. Wilkinson
CPC分类号： H04N5/945 , G11C7/1075
摘要： A video memory comprises a video store for storing video data comprising a plurality of input video data blocks, each input video data block comprising a plurality of pixel data words and one or more ancillary data words associated with that input video data block. The video memory allows the stored pixel data words to be read out, along with their associated ancillary data word(s), in a transposed order and comprises means for reading the ancillary data words associated with a predetermined sequence of input video data blocks into a recirculating output buffer, and serial reading means for reading successive output video data blocks from the video store, each output video data block comprising pixel data words from the predetermined sequence of the input video data blocks, the serial reading means and the recirculating output buffer being operable to output concurrently each pixel data word in each output video data block with its associated ancillary data word(s).
摘要翻译： 视频存储器包括用于存储包括多个输入视频数据块的视频数据的视频存储器，每个输入视频数据块包括多个像素数据字和与该输入视频数据块相关联的一个或多个辅助数据字。 视频存储器允许存储的像素数据字与其相关联的辅助数据字以转置的顺序读出，并且包括用于将与预定的输入视频数据块序列相关联的辅助数据字读入到 循环输出缓冲器和用于从视频存储器读取连续的输出视频数据块的串行读取装置，每个输出视频数据块包括来自输入视频数据块的预定序列的像素数据字，串行读取装置和再循环输出缓冲器 可操作地同时输出具有其相关联的辅助数据字的每个输出视频数据块中的每个像素数据字。
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8.发明授权Television standards converters for converting an input digital video signal from one television standard to another 失效用于将输入数字视频信号从一个电视标准转换为另一个的电视标准转换器
公开(公告)号：US5280351A
公开(公告)日：1994-01-18
申请号：US820740
申请日：1992-01-15
申请人： James H. Wilkinson
发明人： James H. Wilkinson
IPC分类号： H04N7/01
CPC分类号： H04N7/014
摘要： A television standards converter for converting an input digital video signal from one television standard to another, comprises a high-pass filter (36) for filtering the input video signal horizontally and vertically, a plurality of parallel processing channels comprising respective circuits (43 to 58) for determining pixel by pixel of the high-pass filtered video signal the correlation magnitudes for a range of horizontal and vertical pixel offsets, respective low-pass filters (59) for filtering the resulting correlation magnitudes, subtracters (55 to 58) for subtracting from each correlation magnitude in the range the correlation magnitude corresponding to zero pixel offset, a selector (62) for determining for each pixel of said video signal the motion vector corresponding to the maximum correlation magnitude, and a temporal interpolator (FIG. 14) for deriving interpolated fields or frames by combining sample values offset by the motion vectors.
摘要翻译： 一种用于将输入数字视频信号从一个电视标准转换为另一个电视标准转换器的电视标准转换器包括用于水平和垂直地对输入视频信号进行滤波的高通滤波器（36），包括相应电路（43至58）的多个并行处理通道 ），用于确定高通滤波视频信号的像素的像素，水平和垂直像素偏移范围的相关幅度，用于滤除所得到的相关幅度的相应低通滤波器（59），减法器（55至58），用于减去 对应于零像素偏移的相关幅度的范围内的每个相关幅度，用于为所述视频信号的每个像素确定与最大相关幅度相对应的运动矢量的选择器（62）和用于 通过组合由运动矢量偏移的样本值来导出内插场或帧。
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公开(公告)号：US4656514A
公开(公告)日：1987-04-07
申请号：US767646
申请日：1985-08-20
CPC分类号： H04N5/945
摘要： Apparatus for concealing errors in a digital television signal comprises delay elements for deriving a current sample value and a first group of the sample values spatially closest to the current sample value in the same frame of the television signal and delay elements for deriving from the preceding frame of the television signal a delayed sample value corresponding in position to the current sample value and a second group of sample values respectively corresponding in position to the sample values. The current sample value and the delayed sample value are checked for error, and subtractors check pairs of sample values corresponding in position in the current and preceding frames of the television signal for error, derive a measure of the difference in the levels of the sample values in each pair, and combine the results of these checks to provide an output signal which is a measure of the number of the errors and of the sum of the differences. A threshold device checks the output signal against a predetermined threshold level corresponding to an acceptably small number of errors and a relative low degree of movement in the part of a television picture corresponding to the groups of sample values, and a selector is operative, if the sample value is in error, the delayed sample value in not in error, and the output signal is below the predetermined level, to replace the current sample value by the delayed sample value for supply to an output, and, in all other cases, to supply the current sample value to the output.
摘要翻译： 用于隐藏数字电视信号中的错误的装置包括用于导出当前采样值的延迟元件和在电视信号的相同帧中空间上最接近当前采样值的采样值的第一组以及从前一帧导出的延迟元件 电视信号中的位置对应于当前采样值的延迟采样值和分别对应于采样值的位置的第二组采样值。 对当前采样值和延迟采样值进行错误检查，并且减法器检查对应于电视信号当前帧和前一帧中的位置的采样值对，以得出误差的电平差的度量 在每对中，并且将这些检查的结果组合以提供输出信号，其是误差数量和差异之和的量度。 阈值装置根据对应于可接受的少量错误的预定阈值水平检查输出信号，并且在与采样值组对应的电视图像的一部分中相对较低的运动程度，并且选择器可操作，如果 采样值误差，延迟采样值不出错，输出信号低于预定值，将当前采样值替换为延迟采样值供给输出，而在其他情况下， 将当前采样值提供给输出。
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公开(公告)号：US4586183A
公开(公告)日：1986-04-29
申请号：US561782
申请日：1983-12-15
申请人： James H. Wilkinson
发明人： James H. Wilkinson
CPC分类号： G11B20/1833 , H03M13/15 , H04N5/945
摘要： A method of correcting errors in binary data which may represent a digital television signal, comprises dividing the data into a plurality of first blocks, each first block comprising a first plurality of, say sixty, data words and a second plurality of, say six, check words, and further deriving a parity check block for a plurality of the first blocks. Each check word is derived in dependence on all the data words in the first block and each other check word in the first block. One check word may be derived by modulo-2 addition and the remaining check words may be derived by respective primitive polynomial generators.
摘要翻译： 一种校正可表示数字电视信号的二进制数据中的错误的方法，包括将数据划分成多个第一块，每个第一块包括第一多个，例如六十个数据字，第二个多个，例如六个， 检查字，并进一步导出多个第一块的奇偶校验块。 每个检查字根据第一个块中的所有数据字和第一个块中的每个其他检查字导出。 可以通过模2加法导出一个检查词，并且可以通过相应的基本多项式生成器来导出剩余的校验字。
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