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公开(公告)号：US4506286A
公开(公告)日：1985-03-19
申请号：US436897
申请日：1982-10-26
申请人： Kazuo Kashigi
发明人： Kazuo Kashigi
CPC分类号： H04N11/165
摘要： A PAL digital video signal processing arrangement includes converter circuitry for sampling a PAL system video signal in response to sampling pulses having sampling points associated with .+-.U and .+-.V modulation axes on a color vector plane to convert an analog composite video signal containing a luminance signal and a color subcarrier into a digital video signal, and a modulation axis inverting configuration for inverting the polarity of the digitized color subcarrier at the sampling points associated with the .+-.V axis.
摘要翻译： PAL数字视频信号处理装置包括转换器电路，用于响应于具有与色彩矢量平面上的+/- U和+/- V调制轴相关联的采样点的采样脉冲对PAL系统视频信号进行采样，以转换模拟复合视频信号 将亮度信号和彩色副载波包含到数字视频信号中，以及调制轴反转配置，用于使与+/- V轴相关联的采样点处的数字化彩色副载波的极性反转。
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公开(公告)号：US4417271A
公开(公告)日：1983-11-22
申请号：US286756
申请日：1981-07-27
CPC分类号： H04N9/465 , H04N11/165
摘要： A demodulator circuit of PAL type color television signals which is arranged so as to demodulate the correct polarity R-Y signal without controlling the f.sub.H /2 line switching pulse in phase.
摘要翻译： PAL型彩色电视信号的解调电路被布置成在不相位地控制fH / 2线路切换脉冲的情况下解调正确的极性R-Y信号。
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43.发明授权Circuit arrangement for separating the components of a PAL color television signal 失效用于分离PAL彩色电视信号的分量的电路装置
公开(公告)号：US4409612A
公开(公告)日：1983-10-11
申请号：US303308
申请日：1981-09-17
申请人： Leo Warmuth
发明人： Leo Warmuth
CPC分类号： H04N11/165
摘要： Circuit arrangement for separating the components of a PAL color television signal, in which the (digitized) u- and v-signals of the subcarrier frequency are passed through two delay lines which produce different time delays (for example 283.5 and 284 chrominance subcarrier periods): an improved cross-talk attenuation from the luminance signal to the chrominance signals in the lower sideband is then obtained.
摘要翻译： 用于分离PAL彩色电视信号的分量的电路装置，其中子载波频率的（数字化）u和v信号通过产生不同时间延迟的两个延迟线（例如283.5和284个色度副载波周期） 然后获得从亮度信号到下边带中的色度信号的改善的串扰衰减。
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公开(公告)号：US4343017A
公开(公告)日：1982-08-03
申请号：US226862
申请日：1981-01-21
申请人： James H. Wilkinson
发明人： James H. Wilkinson
CPC分类号： H04N11/165
摘要： A composite PAL television signal decoder comprises a first delay device for delaying an input PAL television signal A by one horizontal line scan period minus one quarter of a period of the color sub-carrier signal to produce a first delayed signal B, a second delay device for delaying the signal A by one half of a period of the color sub-carrier signal to produce a second delayed signal C, a third delay device for delaying the signal C by one horizontal line scan period minus one quarter of a period of the color sub-carrier signal to produce a third delayed signal D, means to derive a luminance component Y as one half (A+D), means to derive a chrominance component U as one quarter (B+D) minus one quarter (A+C), and means to derive a chrominance component V as one quarter (C+D) minus one quarter (A+B).
摘要翻译： 复合PAL电视信号解码器包括：第一延迟装置，用于将输入的PAL电视信号A延迟一个水平行扫描周期减去彩色副载波信号周期的四分之一，以产生第一延迟信号B;第二延迟装置 用于将信号A延迟彩色副载波信号的周期的一半以产生第二延迟信号C;第三延迟装置，用于将信号C延迟一个水平行扫描周期减去颜色周期的四分之一 副载波信号以产生第三延迟信号D，将亮度分量Y导出为一半（A + D）的装置，用于将色度分量U导出为四分之一（B + D）减去四分之一（A + C ），以及将色度分量V导出为四分之一（C + D）减去四分之一（A + B）的装置。
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公开(公告)号：US4021842A
公开(公告)日：1977-05-03
申请号：US572675
申请日：1975-04-28
申请人： Armando Campioni
发明人： Armando Campioni
CPC分类号： H04N11/165
摘要： A circuit arrangement for demodulating the chrominance signal portion of a color television signal in an apparatus for receiving at least said color television signal is described. The chrominance signal to be demodulated is of the type that is coded according to the ISA (Identify Suppressing Alternately) system, i.e. the chromatic information modulates in amplitude by carrier suppression a subcarrier along two axes in quadrature, one of the axes being switched 180.degree. each line, a single reference signal of constant phase being inserted only every second line and serving as a reference signal for the demodulation of said subcarrier and as an identification signal for the switching. According to the invention, an electronic gate is provided which opens during part of every second line scanning period to allow the passage of the single reference signal to a passive crystal filter. An amplitude detector circuit receives a plurality of oscillations at subcarrier frequency from the filter and supplies an identification signal for a switching voltage generator which controls the electronic gate and synchronizes a change-over switch which operates at line frequency for obtaining the demodulated chromatic information.
摘要翻译： 描述用于在用于接收至少所述彩色电视信号的装置中解调彩色电视信号的色度信号部分的电路装置。 要解调的色度信号是根据ISA（识别抑制交替）系统编码的类型，即，色彩信息通过载波抑制沿着两个正交方向的副载波抑制幅度，一个轴被切换为180° 每行，恒定相的单个参考信号仅被插入每一个第二行，并且用作用于解调所述子载波的参考信号，并且作为用于切换的识别信号。 根据本发明，提供了一个电子门，其在每个第二行扫描周期的部分期间打开以允许单个参考信号通过无源晶体滤波器。 振幅检测器电路从滤波器接收副载波频率的多个振荡，并提供用于控制电子门的开关电压发生器的识别信号，并且同步用于在线频率工作的转换开关，以获得解调的色度信息。
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公开(公告)号：US3772460A
公开(公告)日：1973-11-13
申请号：US3772460D
申请日：1972-02-11
申请人： GEN CORP
发明人： SUGIHARA Y
CPC分类号： H04N11/165
摘要： A colour synchronizing system for a colour television receiver is constructed according to a signal transmission system in which a pair of colour signals effect simultaneous quadrature balanced modulation of a colour subcarrier with respect to first and second mutually perpendicular modulation axes, the second of which undergoes phase alternation of 180* for successive horizontal lines and in which the resulting colour television signal includes a colour sync signal rendering it possible to discern the alternating polarities of a chrominance signal. Said colour sync signal includes first and second components carried in the initial part of each horizontal line so as to appear concurrently or in succession and has a phase displacement of 90* to each other, the first component being of a fixed phase, and the second component being of a phase which is periodically switched in a manner corresponding to the phase alternation of the second modulation axis for successive horizontal lines. For use in the demodulation along one of the modulation axes which does not undergo phase reversal, a reference subcarrier is formed by deriving a subcarrier of a frequency equal to double the frequency of the colour subcarrier from an offset subcarrier of a frequency fsc + OR - 2n - 1/2 fH, where fsc denotes the frequency of the colour subcarrier, fH line frequency and n a positive integer, frequency dividing by two the subcarrier of a frequency equal to double the frequency of the colour subcarrier, and choosing either polarity of the resulting subcarrier.
摘要翻译： 根据信号传输系统构建彩色电视接收机的彩色同步系统，其中一对彩色信号相对于第一和第二相互垂直的调制轴实现彩色副载波的同步正交平衡调制，其中第二相相互垂直的调制轴经历相位 对于连续的水平线交替180度，并且所得彩色电视信号包括彩色同步信号，使得可以辨别色度信号的交替极性。 所述颜色同步信号包括在每个水平线的初始部分中携带的第一和第二分量，以便同时或相继出现并且相位偏移彼此相差90度，第一分量是固定相，第二分量是固定相 分量具有相对于连续水平线的与第二调制轴的相位交替相对应的方式周期性地切换的相位。 为了沿着不经历相位反转的调制轴之一的解调使用，通过从频率fsc +/-的偏移副载波导出等于彩色副载波的频率的两倍的频率的子载波来形成参考子载波 2n - 1/2 fH，其中fsc表示彩色副载波的频率，fH线频率和na正整数，将频率等于彩色副载波频率的两倍的子载波频率除以二，并选择 产生副载波。
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47.发明授权
公开(公告)号：US3674918A
公开(公告)日：1972-07-04
申请号：US3674918D
申请日：1971-03-02
申请人： FERNSEH GMBH
发明人： LEGLER ERNST
CPC分类号： H04N11/165
摘要： A method and arrangement for the transmission of synchronizing information to color television apparatus, particularly when operated in accordance with the PAL (V-axis) color television system. The required synchronizing signals are all combined within one signal which is then transmitted over a single video transmission line to the color television apparatus. The four required synchronizing signals are the blanking signal, the sync signal, the registration pulse (burst gating pulse) of the color sync signal, and the color carrier signal. The blanking signal and the sync signal are added with identical polarity, whereas the registration pulse (burst gating pulse) of the color sync signal is added with opposite polarity and with equal amplitude. The blanking signal and the registration pulse (burst gating pulse) assume the identical amplitude region. The color carrier signal is added to the preceding sum after suppression of the color carrier frequency portions.
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公开(公告)号：US3553353A
公开(公告)日：1971-01-05
申请号：US3553353D
申请日：1967-01-13
发明人： MELCHIOR GERARD
CPC分类号： H04N11/165
摘要： Phase errors in a PAL color television receiver are eliminated. The color signals are derived from the sum and difference of two terms, the first being the modulated subcarrier, delayed by a period substantially equal to the duration of a line while the other term represents a signal obtained by mixing the nondelayed subcarrier with the subcarrier delayed by a period substantially twice as long as the duration of a line.
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49.发明授权
公开(公告)号：US3534151A
公开(公告)日：1970-10-13
申请号：US58653166
申请日：1966-10-13
申请人： TELEFUNKEN PATENT
发明人： BRUCH WALTER
CPC分类号： H04N11/165 , H04N11/16 , H04N11/162
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