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11.发明授权Digital random error generator supplying burst error signals of random durations starting at random times 失效数字随机误差发生器提供从随机时间开始的随机持续时间的脉冲串错误信号
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
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。
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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
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。
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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
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。
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公开(公告)号：US5463699A
公开(公告)日：1995-10-31
申请号：US141996
申请日：1993-10-28
申请人： James H. Wilkinson
发明人： James H. Wilkinson
摘要： Data compression apparatus is provided for compressing an input stream of n-bit data samples, possible input sample values being notionally divided into groups each containing a number of sample values equal to a respective power of two. The apparatus comprises: means for generating a code word for at least each non-zero value input sample such that the code words for samples with values in each group have a most significant bit of one type in the same position, which position is different for different groups, and the sequence of bits of lower order than said most significant bit is different in code words for samples with different values in the same group; a run-length counter for generating a run-length count dependent upon the number of samples in a run of zero value input samples terminated by a non-zero value sample; means for generating a position indicator indicating the position of said most significant bit of one type in the code word for the non-zero value sample terminating the run; and means for extracting the sequence of bits of lower order than said most significant bit in that code word.
摘要翻译： 提供数据压缩装置，用于压缩n位数据样本的输入流，可能的输入样本值被概念地划分成各自包含等于两个相应幂的样本值的数量的组。 该装置包括：用于为至少每个非零值输入样本产生码字的装置，使得每个组中具有值的采样的码字在同一位置具有一种类型的最高有效位，哪个位置对于 不同的组，并且比同一组中具有不同值的样本的代码字中的低位比所述最高有效位的位序列不同; 取决于由非零值样本终止的零值输入样本的运行中的样本数量来生成游程长度计数的游程长度计数器; 用于产生位置指示符的装置，用于指示终止该运行的非零值样本的码字中的一种类型的最高有效位的位置; 以及用于提取比该码字中的所述最高有效位低位的比特序列的装置。
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15.发明授权Television standards converters using motion vectors corresponding to correlation of horizontal and vertical pixel offsets 失效使用与水平和垂直像素偏移相关的运动矢量的电视标准转换器
公开(公告)号：US5257102A
公开(公告)日：1993-10-26
申请号：US820768
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 first low-pass filter (35) for filtering the input video signal, a high-pass filter (36) for filtering the low-pass filtered 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 second low-pass filters (59) for filtering the resulting correlation magnitudes, 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电视标准的电视标准转换器包括用于对输入视频信号进行滤波的第一低通滤波器（35），用于对低通滤波器进行滤波的高通滤波器 输入视频信号水平和垂直;多个并行处理通道，包括用于确定高通滤波视频信号的逐像素的水平和垂直像素偏移范围的相关幅度的相应电路（43至58），相应的第二低 通过滤波器（59），用于对所得到的相关幅度进行滤波;选择器（62），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;以及时间插值器（图14），用于导出内插场 或通过组合由运动矢量偏移的样本值的帧。
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公开(公告)号：US5177610A
公开(公告)日：1993-01-05
申请号：US820813
申请日：1992-01-15
申请人： James H. Wilkinson
发明人： James H. Wilkinson
CPC分类号： H04N7/014 , H04N19/523 , H04N5/145
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 pluraity 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, low-pass filters (59) for filtering the resulting correlation magnitudes, a selecter (62) for determining for each pixel of said video signal, from the relationship between motion vector magnitude and the correlation magnitude, 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成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）的并行处理通道 ），用于确定所述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，用于滤波所得到的相关幅度的低通滤波器（59），用于为每个 所述视频信号的像素根据运动矢量幅度与相关幅度之间的关系，对应于最大相关幅度的运动矢量以及时间插值器（图14），用于通过组合由 运动矢量。
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17.发明授权Video signal clamping circuit operating in the digital domain for removing excess noise on the black level and for providing d c restoration 失效在数字域中操作的视频信号钳位电路，用于在黑电平上移除过高的噪声并提供D恢复
公开(公告)号：US5057920A
公开(公告)日：1991-10-15
申请号：US472839
申请日：1990-01-31
申请人： James H. Wilkinson
发明人： James H. Wilkinson
IPC分类号： H04N5/18
CPC分类号： H04N5/185
摘要： In a video signal clamping circuit, a FIFO register stores a sequence of digital samples of an input video signal taken during a portion of a horizontal blanking interval of the signal during which the signal is at a black level. A black level error PROM generates a digital error signal representing any deviation between a digital sample from the FIFO register and a reference black level. An accumulator accumulates digital error signals supplied thereto by the PROM to produce an accumulated digital error signal which is converted to analog form by a digital-to-analog converter. A clock controls the supply of the stores samples in sequence from the FIFO register to the PROM such that the samples are supplied, during a line-active period that follows the horizontal blanking interval, at a clock frequency which is less than the sampling frequency. The analog error signal is combined with the input video signal in an operational amplifier to cause the black level of the input video signal to approach the reference black level.
摘要翻译： 在视频信号钳位电路中，FIFO寄存器存储在信号处于黑电平的信号的水平消隐间隔的一部分期间拍摄的输入视频信号的数字样本序列。 黑电平错误PROM产生一个数字误差信号，表示来自FIFO寄存器的数字采样与参考黑电平之间的任何偏差。 累加器累积由PROM提供给其的数字误差信号，以产生由数模转换器转换为模拟形式的累积数字误差信号。 时钟控制从FIFO寄存器到PROM的存储样本的供应，使得样本在低于采样频率的时钟频率的水平消隐间隔期间的线路有效期间被提供。 模拟误差信号与运算放大器中的输入视频信号相结合，使输入视频信号的黑电平接近参考黑电平。
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公开(公告)号：US4922329A
公开(公告)日：1990-05-01
申请号：US223387
申请日：1988-07-25
申请人： James H. Wilkinson
发明人： James H. Wilkinson
CPC分类号： H04N11/042
摘要： Apparatus for coding a digital component video signal, comprising first means for modulating a first carrier signal with one of the component chrominance signals, the first carrier signal having a four-field sequence such that the phase of the first carrier signal is inverted at every line interval, second means for modulating a second carrier signal with the other of the component chrominance signals, the second carrier signal having a two-field sequence such that the phase of the second carrier signal is inverted at every field interval, and means for combining a luminance signal with the modulated chrominance signals to thereby reduce the bandwidth of the combined component video signal.
摘要翻译： 用于对数字分量视频信号进行编码的装置，包括用于利用分量色度信号中的一个调制第一载波信号的第一装置，所述第一载波信号具有四场序列，使得第一载波信号的相位在每一行 间隔，用于利用所述分量色度信号中的另一个调制第二载波信号的第二装置，所述第二载波信号具有两场序列，使得所述第二载波信号的相位在每个场间隔处反相，以及用于组合 具有调制色度信号的亮度信号，从而降低组合分量视频信号的带宽。
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公开(公告)号：US4901139A
公开(公告)日：1990-02-13
申请号：US223527
申请日：1988-07-25
申请人： James H. Wilkinson , Ueda Mamoru
发明人： James H. Wilkinson , Ueda Mamoru
CPC分类号： H04N9/8045 , H04N11/046 , H04N19/50 , H04N19/895 , H04N19/90
摘要： In a system in which a digital video signal is transmitted with differential pulse code modulation, a predetermined number of samples alternate in a horizontal line of the digital video signal are grouped, and the center sample of the grouped samples of the digital video signal is transmitted with the original number of bits, while the other samples of a group are differentially modulated with reference to the respective center sample and are transmitted with the center sample as a cluster of samples.
摘要翻译： 在以差分脉冲编码调制方式发送数字视频信号的系统中，在数字视频信号的水平线上交替的预定数量的样本被分组，并且传送数字视频信号的分组采样的中心采样 原始位数，而组的其他样本参考相应的中心样本进行差分调制，并以中心样本作为样本簇发送。
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公开(公告)号：US4803567A
公开(公告)日：1989-02-07
申请号：US925377
申请日：1986-10-30
摘要： A video replay store for a multi-channel digital video tape recorder, comprises a respective channel store for each channel, each channel store comprising a plurality of field stores which are written in and read from cyclically, a respective field boundary detector for each channel, each field boundary detector supplying a first pulse in response to each field boundary where an odd field changes to an even field, and a second pulse in response to each field boundary where an even field changes to an odd field, in the off-tape data in the respective channel, and a replay store controller for supplying write requests and read requests in a predetermined sequence to all of the channel stores, the replay store controller stepping on to the next state in the predetermined sequence in response to each first first pulse following a second pulse and each first second pulse following a first pulse.
摘要翻译： 用于多声道数字录像机的视频重放存储器包括用于每个声道的相应通道存储器，每个通道存储器包括被循环写入和读取的多个场存储器，每个通道的相应场边界检测器， 每个场边界检测器响应于奇数场改变为偶数场的每个场边界提供第一脉冲，以及响应于偶数场改变为奇数场的每个场边界的第二脉冲，在离带数据中 在相应的通道中，以及重放存储控制器，用于以预定的顺序向所有的通道存储器提供写入请求和读取请求，响应于每个第一个第一个脉冲，重播存储控制器以预定的顺序进入下一个状态 第二脉冲和跟随第一脉冲的每个第一第二脉冲。
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