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1. 发明授权

US4296434A Method of and apparatus for movement portrayal with a raster e.g. television, display 失效
标题翻译：用光栅进行移动描绘的方法和装置电视，展示
公开(公告)号：US4296434A
公开(公告)日：1981-10-20
申请号：US43608
申请日：1979-05-29
申请人： John O. Drewery , Richard Storey
发明人： John O. Drewery , Richard Storey
IPC分类号： H04N9/00 , G06T7/20 , H04N5/14 , H04N5/262 , H04N9/64 , H04N9/877
CPC分类号： H04N5/2625 , G06T7/2053 , H04N5/144 , H04N9/64 , H04N9/877
摘要： To portray movement in a television display, a field of the signal is stored in an image store (110), and subsequent input fields are compared in a motion detector (104) with the stored field to detect differences between them due to movement. A flag is retained in an auxiliary store (114) to indicate the positions in the field of the detected differences. For those positions for which a new difference is detected, i.e. for which no difference has been detected previously, the corresponding portions of the then current input scan are stored in the image store (110), by a switch (106) being connected to the input (102). For portions which are flagged, the output of the auxiliary store (114) causes the switch (106) to take the output of the image store (110), thus insetting past positions of movement into the current field. The background of the field in the image store is nevertheless updated by the background of the input field. To allow for the 4-field NTSC or 8-field PAL cycle, transducers, or predictors, (170,160) are placed at the input and output of the image store (110) such that the image store retains information in one state only of the cycle. The motion detector (104) comprises a subtractor, a rectifier and a low-pass filter.
摘要翻译：为了在电视显示器中描绘移动，信号的场被存储在图像存储器（110）中，并且在运动检测器（104）中将后续的输入场与存储的场进行比较，以检测它们之间由于移动而产生的差异。标志被保留在辅助存储器（114）中以指示检测到的差异的字段中的位置。对于检测到新的差异的那些位置，即，先前没有检测到差异的位置，当前输入扫描的相应部分被存储在图像存储器（110）中，由开关（106）连接到输入（102）。对于被标记的部分，辅助存储器（114）的输出使得开关（106）采取图像存储器（110）的输出，从而将过去的移动位置插入到当前场中。图像存储中的字段的背景仍然被输入字段的背景更新。为了允许4场NTSC或8场PAL循环，换能器或预测器（170,160）被放置在图像存储器（110）的输入和输出处，使得图像存储器仅将信息保存在一个状态中周期。运动检测器（104）包括减法器，整流器和低通滤波器。

2. 发明授权

US4249210A Video noise reduction system 失效
标题翻译：视频降噪系统
公开(公告)号：US4249210A
公开(公告)日：1981-02-03
申请号：US23593
申请日：1979-03-26
申请人： Richard Storey , John O. Drewery
发明人： Richard Storey , John O. Drewery
IPC分类号： H04N5/21
CPC分类号： H04N5/21
摘要： Reduction of noise in a television signal is achieved by comparing signals from successive scans to produce a difference signal. Low amplitude differences are assumed to represent noise and are attenuated. Differences above a predetermined level are assumed to represent movement and are not so attenuated. The attenuation is achieved by a multiplier which receives as multiplier the output of a non-linear transfer characteristic element. The non-linear element receives the differences after rectification and after passing through a variable-gain element. The non-linear element is such that above a predetermined value a constant predetermined minimum attenuation factor applies. A noise measurement circuit measures the noise present in the difference signal and controls the gain of the variable-gain element accordingly. Several noise-measurement circuits may be provided, a selected one of which is used in dependence upon the magnitude of the input signal to the apparatus.

3. 发明授权

US4288810A Method of and apparatus for deriving a PAL color television signal corresponding to any desired field in an 8-field PAL sequence from one stored field or picture of a PAL signal 失效
标题翻译：用于从PAL信号的一个存储的场或图像中导出与8场PAL序列中的任何所需场对应的PAL彩色电视信号的方法和装置
公开(公告)号：US4288810A
公开(公告)日：1981-09-08
申请号：US43540
申请日：1979-05-29
申请人： John O. Drewery , Richard Storey
发明人： John O. Drewery , Richard Storey
IPC分类号： G06T7/20 , H04N5/14 , H04N5/262 , H04N9/64 , H04N9/877 , H04N9/39 , H04N9/535
CPC分类号： H04N9/877 , G06T7/2053 , H04N5/144 , H04N5/2625 , H04N9/64
摘要： A single field of a PAL color television signal is stored in a store (50) and provides a signal at an input (52). The signal is delayed by one-line delays (56,58) in series to provide one and two-line delayed signals. Separate switching units (60,62) select desired ones or combinations of the input and delayed signals to constitute respectively the low-frequency and chrominance part of the signal at the output (82). The switch positions are changed between fields, and for at least some fields of the PAL sequence each component of the output signal is formed by combining signals from more than one line, i.e. a halving adder (64;66) averages successive lines for the low frequency part of the signal and a halving subtractor (68) forms the difference between lines two lines apart for the chrominance part. The selector unit outputs are combined in an adder (78) which receives the output of the first selector (60), and also the difference between the output of the two selectors after band pass filtering (76). The store (50) can be replaced by a random access store capable of outputting three successive lines simultaneously. The apparatus has special utility in equipment for movement portrayal.
摘要翻译： PAL彩色电视信号的单个场被存储在存储器（50）中，并在输入端（52）提供信号。信号被串行延迟一行延迟（56,58），以提供一行和两行延迟信号。分离的开关单元（60,62）选择所需的输入和延迟信号的组合，分别构成输出端（82）处的信号的低频和色度部分。开关位置在场之间改变，并且对于PAL序列的至少一些场，输出信号的每个分量通过组合来自多于一个线的信号形成，即，一半加法器（64; 66）将连续的线平均为低信号的频率部分和减法减法器（68）形成色度部分两行分开的行之间的差异。选择器单元输出在接收第一选择器（60）的输出的加法器（78）中以及带通滤波后的两个选择器的输出之间的差（76）组合。存储器（50）可以由能够同时输出三个连续行的随机存取存储器代替。该装置在运动描绘设备中具有特殊效用。

4. 发明授权

US5426465A Television systems 失效
标题翻译：电视系统
公开(公告)号：US5426465A
公开(公告)日：1995-06-20
申请号：US50373
申请日：1993-05-12
申请人： John O. Drewery
发明人： John O. Drewery
IPC分类号： H04N11/16 , H04N11/06
CPC分类号： H04N11/16 , H04N11/167
摘要： To increase the horizontal bandwith of the Weston PAL chrominance signal spectrum folding techniques are used. Spectral components with high horizontal frequency and low vertical and/or temporal frequency are carried as components with low horizontal frequency and high vertical and/or temporal frequency. A matrix (120) forms U+V(P) and U-V(M) chrominance signals which are then prefiltered using either rhombic spatial filters or rhombic vertical-temporal filters (122, 124). The two signals are then sampled by sampler (126, 128) which together with switch (136) form U+V samples on alternate lines to the U-V samples. The sampling patterns for the P and M signals are identical but shifted.
摘要翻译： PCT No.PCT / GB91 / 02075 Sec。 371日期：1993年5月12日 102（e）日期1993年5月12日PCT 1991年11月21日PCT PCT。 WO92 / 10068 PCT公开号日期：1992年6月11日。为了增加Weston PAL色度信号的水平带宽，使用频谱折叠技术。具有高水平频率和低垂直和/或时间频率的光谱分量被携带为具有低水平频率和高垂直和/或时间频率的分量。矩阵（120）形成U + V（P）和U-V（M）色度信号，然后使用菱形空间滤波器或菱形垂直时间滤波器（122,124）进行预过滤。然后，两个信号由采样器（126,128）采样，其与开关（136）一起在U-V采样的交替线上形成U + V采样。 P和M信号的采样模式是相同但偏移的。

5. 发明授权

US4322739A Processing of N.T.S.C. color television signals 失效
标题翻译：加工N.T.S.C. 彩色电视信号
公开(公告)号：US4322739A
公开(公告)日：1982-03-30
申请号：US137697
申请日：1980-04-07
申请人： John O. Drewery , Martin Weston
发明人： John O. Drewery , Martin Weston
IPC分类号： H04N11/04 , H04N11/20 , H04N9/32
CPC分类号： H04N11/048 , H04N11/20
摘要： Digital sampling of the luminance component of an N.T.S.C. color television signal is achieved by sampling with a mean frequency of twice the color subcarrier frequency to produce a sub-Nyquist sampled luminance signal. The sampling phase is changed between each pair of lines by an amount equal to half the interval between samples. The digital sampling can be applied to separate luminance and chrominance signals, to encoded N.T.S.C., and to the conversion of N.T.S.C. signals into signals of other form including PAL. Further, phase-perturbed sampling techniques permit the construction of an advantageous N.T.S.C. coder and de-coder system. The coder operates to cause spectrum folding of a luminance input signal by multiplying by a phase perturbed signal of twice the color subcarrier, and adding, the resultant being comb filtered to select frequencies which are multiples of the line frequency. The chrominance signals I, Q are combined into I.+-.Q and are modulated onto phase-perturbed subcarrier, the resultant being comb filtered to select frequencies which are of integral multiples of half the line frequencies. The two signals are then added.The comb filters mentioned can be based on one line delays or on odd multiples of one line, particularly 263 or 525 lines. A converse decoder filters then spectrum folds the luminance component, and filters and multiplies by subcarrier to derive the chrominance. Once an N.T.S.C. signal has been encoded by use of the encoder, subsequent decoding and recoding produces no theoretical impairment into the signal.
摘要翻译： N.T.S.C.的亮度分量的数字采样通过用彩色副载波频率的两倍的平均频率进行采样来实现彩色电视信号，以产生亚奈奎斯特采样亮度信号。采样相位在每对线之间变化一个等于采样间隔的一半的量。数字采样可以应用于分离的亮度和色度信号，编码N.T.S.C.和N.T.S.C.的转换。信号转换成包括PAL的其他形式的信号。此外，相位扰动采样技术允许构建有利的N.T.S.C. 编码器和解码器系统。编码器通过乘以两倍于彩色副载波的相位扰动信号来进行亮度输入信号的频谱折叠，并将相加的梳状滤波后的结果进行梳状滤波以选择是频率倍数的频率。色度信号I，Q被组合成I +/- Q并且被调制到相位扰动的副载波上，其结果被梳状滤波以选择频率为一半的整数倍的频率。然后添加两个信号。所提到的梳状滤波器可以基于一行延迟或一行的奇数倍，特别是263或525行。相反的解码器滤波器然后频谱折叠亮度分量，并且通过副载波滤波和乘法以导出色度。一旦N.T.S.C. 信号已经通过使用编码器进行编码，随后的解码和重新编码不会对信号产生理论上的损害。

6. 发明授权

US4897716A Method and apparatus for adaptively displaying video signals 失效
标题翻译：自动显示视频信号的方法和装置
公开(公告)号：US4897716A
公开(公告)日：1990-01-30
申请号：US227906
申请日：1988-08-01
申请人： John O. Drewery , Arthur H. Jones
发明人： John O. Drewery , Arthur H. Jones
IPC分类号： H04N5/14 , H04N5/44 , H04N7/01 , H04N7/015
CPC分类号： H04N7/0137 , H04N5/144 , H04N7/012
摘要： A video display device has a scanning standard which is instantaneously adaptively dependent on the presence of movement in the picture. With a 625/50/2:1 input signal, in the absence of motion the standard used is 625/100/2:1. In the presence of motion the standard can remain 625/50/2:1. The video input is applied to aline store (108) and through an attenuator (102) to field stores (104). An appropriate one of the store outputs is selected by a switch (12) in dependence on a movement signal (116). In a preferred alternative, in the presence of motion the standard is altered to 625/50/1:1.
摘要翻译： PCT No.PCT / GB87 / 00868 Sec。 371日期1988年8月1日 102（e）日期1988年8月1日PCT提交1987年12月2日PCT公布。出版物WO88 / 04505 日期1988年6月16日。视频显示装置具有瞬时自适应地依赖于图像中的移动的扫描标准。使用625/50/2：1的输入信号，在没有运动的情况下使用的标准是625/100/2：1。在运动的情况下，标准可以保持在625/50/2：1。视频输入被应用于存储器（108）并且通过衰减器（102）应用于字段存储（104）。根据移动信号（116），由开关（12）选择适当的一个存储输出。在优选的替代方案中，在运动存在的情况下，将标准改变为625/50/1:1。

7. 发明授权

US4223341A Circuitry providing a delayed color television signal having luminance and chrominance components derived from adjacent lines 失效
标题翻译：提供具有从相邻线导出的亮度和色度分量的延迟彩色电视信号的电路
公开(公告)号：US4223341A
公开(公告)日：1980-09-16
申请号：US30239
申请日：1979-04-16
申请人： John O. Drewery
发明人： John O. Drewery
IPC分类号： H04N9/64 , H04N9/87 , H04N11/14 , H04N11/16 , H04N9/535
CPC分类号： H04N11/16 , H04N11/14 , H04N9/646 , H04N9/87
摘要： In a method of and apparatus for processing 625-line PAL colour television signals, in which in conjunction with each line of the signal there is provided an additional signal for use therewith, the additional signal is formed essentially of the luminance component of a signal equivalent to the signal 625 lines previous to the current line, and the chrominance component of a signal substantially equivalent to the signal 624 lines previous to the current line. Alternatively, the difference of the chrominance components 624 and 626 lines previous may be used. For 525-line N.T.S.C. the luminance component is derived from the signal 525 lines previous, and the chrominance component is the chrominance component of the signal 524 or 526 lines previous to the current line, or an average of these. The form of the chrominance component may be selected automatically in dependence upon vertical chrominance detail.
摘要翻译：在用于处理625行PAL彩色电视信号的方法和装置中，其中结合信号的每一行提供了与其一起使用的附加信号，附加信号基本上由等效信号的亮度分量形成与当前行之前的信号625行以及与当前行之前的信号624行的信号基本相等的信号的色度分量。或者，可以使用之前的色度分量624和626行之间的差。对于525线N.T.S.C. 亮度分量从先前的信号525行导出，并且色度分量是信号524的色度分量或当前行之前的526行或其平均值。可以根据垂直色度细节自动选择色度分量的形式。

8. 发明授权

US4212028A Processing pal color television signals 失效
标题翻译：处理彩色电视信号
公开(公告)号：US4212028A
公开(公告)日：1980-07-08
申请号：US938028
申请日：1978-08-30
申请人： John O. Drewery
发明人： John O. Drewery
IPC分类号： H04N11/04 , H04N9/39
CPC分类号： H04N11/048
摘要： In a method and apparatus for transcoding digital PAL color television signals between (i) a 2fsc format consisting of an encoded signal of PAL type sampled at 2fsc and (ii) a 3fsc format consisting of a luminance signal Y at 2fsc and a chrominance signal C sampled at fsc and comprising U+V and U-V on alternate lines (or either the luminance signal or composite chrominance signal by itself), avoid the need to convert the signal to analogue PAL form as an intermediate step. Converting from the 2fsc to the 3fsc format, over the chrominance bandwidth undelayed and 1- and 2-line delayed samples are combined in the proportions 1/4:1/2:1/4, and below the chrominance band the 1-line delayed samples are low-pass filtered, these together providing the luminance signal Y. To provide the chrominance signal C the undelayed and 2-line delayed signals are combined in the proportions -1/4:1/4. The low- and band-pass filters are digital transversal filters operating on adjacent samples in the signal. Transcoding in the other direction is similar.
摘要翻译：在（i）由2fsc采样的PAL类型的编码信号和（ii）由2fsc的亮度信号Y和色度信号C组成的3fsc格式组成的2fsc格式之间对数字PAL彩色电视信号进行代码转换的方法和装置中，以fsc采样，并且在交替行上（或者亮度信号或复合色度信号本身）包括U + V和UV，避免了将信号转换为模拟PAL形式作为中间步骤。从2fsc转换为3fsc格式，在色度带宽无延迟和1和2行延迟采样中以1/4：1/2：1/4的比例组合，并且在色带上低于1行延迟样本被低通滤波，这些一起提供亮度信号Y.为了提供色度信号C，未延迟和2行延迟信号以比例-1/4：1/4组合。低通和带通滤波器是对信号中相邻采样进行操作的数字横向滤波器。另一个方向的代码转换是相似的。

9. 发明授权

US4843468A Scanning techniques using hierarchical set of curves 失效
标题翻译：扫描技术使用分层的曲线集
公开(公告)号：US4843468A
公开(公告)日：1989-06-27
申请号：US72889
申请日：1987-07-14
申请人： John O. Drewery
发明人： John O. Drewery
IPC分类号： H04N7/01 , H04N3/30
CPC分类号： H04N3/30
摘要： Conventionally, transmission of television images is performed by Raster scanning. To avoid the problems associated with flyback, and the limiting of Raster scanning to image scanning standards it is proposed to transmit images by scanning along a locus defined by a fractal curve. A Peano curve is particularly suitable. Image resolution may be varied by varying the order of curve used to scan the image. Smoothing of a curve of a given order results in a graceful degradation to a curve of lower order so that the image created by a given order is still recognizable when displayed by a lower or higher order.
摘要翻译：通常，通过光栅扫描进行电视图像的发送。为了避免与反激相关的问题，以及光栅扫描对图像扫描标准的限制，提出了通过沿分形曲线定义的轨迹进行扫描来传输图像。 Peano曲线特别适合。可以通过改变用于扫描图像的曲线的顺序来改变图像分辨率。给定顺序的曲线的平滑导致较低阶曲线的优雅退化，以便当以较低或更高次序显示时，由给定顺序创建的图像仍然可识别。

10. 发明授权

US4322750A Television display system 失效
标题翻译：电视显示系统
公开(公告)号：US4322750A
公开(公告)日：1982-03-30
申请号：US122406
申请日：1980-02-19
申请人： Arthur V. Lord , Kenneth Hacking , John O. Drewery
发明人： Arthur V. Lord , Kenneth Hacking , John O. Drewery
IPC分类号： H04N5/14 , H04N5/44 , H04N5/02
CPC分类号： H04N7/0132 , H04N5/144 , Y10S348/91
摘要： To provide improved resolution of a television, e.g. CRT, display with reduced large-area flicker, twittering of horizontal edges, and line structure of the picture, the field rate is doubled and the number of lines per field is doubled from that of a received input television signal. Preferably a 21/2 field store arranged in half-field units is used, together with a four-line store arranged in one line units to provide line interpolation, which can be adaptively dependent upon the presence or absence of motion.
摘要翻译：为了提供改进的电视分辨率，例如 CRT，具有减小的大面积闪烁，水平边缘的微调和图像的线结构的显示器，场速率加倍，并且每个场的行数与接收的输入电视信号的数量相加。优选地，以半场单位布置的21/2场存储被使用，并且以一行单位布置的四行存储器提供线插补，其可以自适应地依赖于运动的存在或不存在。

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