公开(公告)号：US4766602A

公开(公告)日：1988-08-23

申请号：US18209

申请日：1987-02-24

申请人： James H. Wilkinson ,  Roger Lagadec

发明人： James H. Wilkinson ,  Roger Lagadec

IPC分类号： H04L7/04 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30 ,  H04L7/08

CPC分类号： G11B27/3027 ,  G11B20/1262 ,  G11B20/1403 ,  H04L7/0037 ,  H04L7/08

摘要： A method of decoding digital synchronizing signals each of which consists of a plurality of bits in a predetermined pattern, the intervals between the starts of successive synchronizing signals in an input digital signal being variable over a range, comprises ascertaining the bit period distance between the starts of two successive synchronizing signals, subsequently searching the input digital signal for the pattern using a window comprising the bit period distance, which window is varied in position if the bit period distance changes, and supplying an output synchronizing pulse in synchronism with subsequent synchronizing signals found in the window.

摘要翻译： 一种解码数字同步信号的方法，每个数字同步信号由预定模式中的多个比特构成，输入数字信号中的连续同步信号的开始间隔在一个范围内是可变的，包括确定开始之间的比特周期距离 的两个连续同步信号，随后使用包括位周期距离的窗口搜索输入数字信号以获取图案，该窗口如果位周期距离改变则在位置上变化，并且提供与所发现的后续同步信号同步的输出同步脉冲 在窗口里

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。

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

IPC分类号： G06F12/00 ,  G11C7/10 ,  H04N5/907 ,  H04N5/92 ,  H04N5/937 ,  H04N5/945 ,  H04N5/76

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。

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。

公开(公告)号：US5268905A

公开(公告)日：1993-12-07

申请号：US885863

申请日：1992-05-20

申请人： Jonathan M. Soloff ,  Jonathan J. Stone ,  Terence R. Hurley ,  James H. Wilkinson

发明人： Jonathan M. Soloff ,  Jonathan J. Stone ,  Terence R. Hurley ,  James H. Wilkinson

IPC分类号： H04J1/00 ,  H03H17/00 ,  H03H17/02 ,  H03H17/06 ,  H04N7/12

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。

公开(公告)号：US4656514A

公开(公告)日：1987-04-07

申请号：US767646

申请日：1985-08-20

申请人： James H. Wilkinson ,  John G. S. Ive ,  Peter C. Boreland

发明人： James H. Wilkinson ,  John G. S. Ive ,  Peter C. Boreland

IPC分类号： G11B20/18 ,  H04N5/92 ,  H04N5/945 ,  H04N7/26 ,  H04N5/14

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。

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

IPC分类号： G06F11/10 ,  G11B20/18 ,  H01F5/00 ,  H03M13/00 ,  H03M13/15 ,  H04N5/945

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。

公开(公告)号：US4571546A

公开(公告)日：1986-02-18

申请号：US552117

申请日：1983-11-16

申请人： James H. Wilkinson

发明人： James H. Wilkinson

IPC分类号： G01R31/28 ,  G01R31/3183 ,  G06F7/58 ,  H03K3/84 ,  H04L29/14 ,  G06F7/00 ,  H03K3/017

CPC分类号： H03K3/84 ,  G06F7/582

摘要： A digital random error generator for generating burst errors comprises a first digital random error generator arrangement including a first pseudo random generator and a static random number generator for generating burst start signals at random times, a second digital random error generator arrangement including a second pseudo random generator and a second static random number generator for generating burst errors of random duration, and a flip-flop circuit receiving the outputs of the digital random error generator arrangements whereby the output of the second digital random error generator arrangement is enabled in dependence on the output of the first digital random error generator arrangement, so that the digital random error generator supplies a burst error of random duration starting at each above-mentioned random time.

摘要翻译： 一种用于产生脉冲串错误的数字随机误差发生器包括：第一数字随机误差发生器装置，包括第一伪随机发生器和用于在随机时间产生突发起始信号的静态随机数发生器;第二数字随机误差发生器装置，包括第二伪随机 发生器和用于产生随机持续时间的脉冲串错误的第二静态随机数发生器，以及接收数字随机误差发生器装置的输出的触发器电路，由此第二数字随机误差发生器装置的输出根据输出 的第一数字随机误差发生器装置，使得数字随机误差发生器从每个上述随机时间开始提供随机持续时间的脉冲串错误。

公开(公告)号：US4447902A

公开(公告)日：1984-05-08

申请号：US359996

申请日：1982-03-19

申请人： James H. Wilkinson

发明人： James H. Wilkinson

IPC分类号： H03M13/00 ,  G06F11/10 ,  G11B20/18 ,  H03M13/09 ,  H04L1/00 ,  H04N5/926 ,  H04N5/945 ,  H04N7/26

CPC分类号： G06F11/10 ,  G11B20/1813 ,  H03M13/09 ,  H04N5/926 ,  H04N5/945

摘要： An error-correction format for transmitting digital television signals comprises segments of data, which segments may for example represent 48 successive horizontal lines of a television field. The segment comprises, for example, data groups n to n+23 and a final group n+24 which forms a vertical parity check group. Each of the data groups n to n+23 comprises m blocks, and each block comprises a synchronization and address sub-block followed by s data sub-blocks, each data sub-block being followed by respective inner code protection bits for providing error protection for the immediately preceding data sub-block, and finally followed by a cyclic redundancy check code for providing error protection for the s data sub-blocks in the block. The vertical parity group n+24 is just the same in format as the other groups n to n+23, but each sub-block thereof is made up of vertical parity check words which form an outer error correcting code in place of data words.

摘要翻译： 用于发送数字电视信号的纠错格式包括数据段，这些段可以例如表示电视场的48个连续的水平行。 该段包括例如形成垂直奇偶校验组的数据组n至n + 23和最终组n + 24。 数据组n至n + 23中的每一个包括m个块，并且每个块包括跟随s个数据子块的同步和地址子块，每个数据子块后面有相应的内部代码保护位，用于提供错误保护 对于紧接在前的数据子块，并且最后跟随循环冗余校验码，用于为块中的s个数据子块提供错误保护。 垂直奇偶校验组n + 24的格式与其他组n到n + 23的格式相同，但是每个子块由形成外部纠错码的垂直奇偶校验字代替数据字组成。

公开(公告)号：US4419693A

公开(公告)日：1983-12-06

申请号：US248861

申请日：1981-03-30

申请人： James H. Wilkinson

发明人： James H. Wilkinson

IPC分类号： H04B14/04 ,  G11B20/18 ,  H04B1/10 ,  H04N5/92 ,  H04N5/93 ,  H04N9/64 ,  H04N9/88 ,  H04N9/888 ,  H04N5/21

CPC分类号： H04N5/93 ,  H04N9/64 ,  H04N9/88 ,  H04N9/888

摘要： A method of concealing errors in a digital television signal formed by a plurality of sample signals corresponding respectively to sample positions along a horizontal scan line of a television picture made up of a plurality of such lines, the method comprising, in respect of each sample signal which is in error, selecting from a plurality of algorithms a preferred algorithm for correcting the error sample signal, calculating a corrected value of the error sample signal using the preferred algorithm, and substituting the corrected sample signal for the error sample signal so as to conceal the error. The algorithms may be four in number and use sample values located along four different directions respectively, such as the horizontal, the vertical, and the two diagonal directions of the television raster, to predict the known sample values at sample positions adjacent to the position of the error sample signal, the algorithm giving the best result being selected.

摘要翻译： 一种隐藏由多个采样信号形成的数字电视信号中的错误的方法，所述多个采样信号分别对应于由多个这样的行组成的电视图像的水平扫描线的采样位置，所述方法包括：针对每个采样信号 这是错误的，从多种算法中选择用于校正误差采样信号的优选算法，使用优选算法计算误差采样信号的校正值，并将校正后的采样信号代入误差采样信号以隐藏 错误。 算法可以是四个数字，并且分别使用沿着四个不同方向的采样值，例如电视光栅的水平，垂直和两个对角线方向，以预测与位置相邻的采样位置处的已知采样值 误差采样信号，算法给出最佳结果被选择。