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    • 1. 发明授权
    • 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
    • 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
    • US4288810A
    • 1981-09-08
    • US43540
    • 1979-05-29
    • John O. DreweryRichard Storey
    • John O. DreweryRichard Storey
    • G06T7/20H04N5/14H04N5/262H04N9/64H04N9/877H04N9/39H04N9/535
    • H04N9/877G06T7/2053H04N5/144H04N5/2625H04N9/64
    • 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.
    • 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。
    • 2. 发明授权
    • Method of and apparatus for movement portrayal with a raster e.g.
television, display
    • 用光栅进行移动描绘的方法和装置 电视,展示
    • US4296434A
    • 1981-10-20
    • US43608
    • 1979-05-29
    • John O. DreweryRichard Storey
    • John O. DreweryRichard Storey
    • H04N9/00G06T7/20H04N5/14H04N5/262H04N9/64H04N9/877
    • H04N5/2625G06T7/2053H04N5/144H04N9/64H04N9/877
    • 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.
    • 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。
    • 6. 发明授权
    • Movement detector for television signals
    • 运动检测器用于电视信号
    • US4364087A
    • 1982-12-14
    • US174426
    • 1980-08-01
    • Richard StoreyAlan Roberts
    • Richard StoreyAlan Roberts
    • H04N5/14H04N7/18
    • H04N5/144H04N5/147
    • A movement detector for television signals measures the difference between maximum and minimum values of the movement components of a picture difference signal over a chosen interval. A television signal at an input (12) is delayed in a picture delay (2), and the delayed and undelayed signals subtracted in a subtractor (1) to form a picture difference signal. This is rectified in rectifier (3) and smoothed in a filter (4). A maximum detector (6) and a minimum detector (7) are coupled to the filter output and are re-set at prescribed intervals. A subtractor (8) determines the difference between the output of detectors (6) and (7) and this is compared with a reference value in a comparator (9), the output of which is sampled and stored in a store (10).
    • 用于电视信号的移动检测器测量在所选择的间隔上的图像差分信号的运动分量的最大值和最小值之间的差异。 在输入端(12)处的电视信号在图像延迟(2)中延迟,并且延迟和未延迟的信号在减法器(1)中减去以形成图像差分信号。 这在整流器(3)中整流并在滤波器(4)中平滑化。 最大检测器(6)和最小检测器(7)耦合到滤波器输出,并以规定的间隔重新设定。 减法器(8)确定检测器(6)和(7)的输出之间的差异,并且将其与比较器(9)中的参考值进行比较,比较器(9)的输出被采样并存储在存储器(10)中。