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1. 发明授权

US4386363A Chroma key switching signal generator 失效
标题翻译：色键切换信号发生器
公开(公告)号：US4386363A
公开(公告)日：1983-05-31
申请号：US252864
申请日：1981-04-10
申请人： Eric F. Morrison
发明人： Eric F. Morrison
IPC分类号： H04N9/75 , H04N9/535
CPC分类号： H04N9/75
摘要： A wideband chroma key switching signal is generated from lower bandwidth chrominance signals in a video signal by first conventionally generating a chroma key switching signal from these chrominance signals, and then detecting high frequency transition components in the corresponding luminance signal. These luminance signal high frequency components are then added to the switching signal in a manner that insures that their polarities match, thereby generating a higher bandwidth chroma key switching signal. This resultant higher bandwidth chroma key switching signal is used to control cross fade amplifiers which function to output either the video signals of a first or a second scene with linear transitions between these video signals during switching.
摘要翻译：通过首先从这些色度信号生成色键切换信号，然后检测对应的亮度信号中的高频转换分量，从视频信号中的较低带宽色度信号产生宽带色键切换信号。然后将这些亮度信号高频分量加到切换信号中，确保它们的极性匹配，从而产生更高带宽色度键切换信号。这种所产生的更高带宽色度键切换信号用于控制交叉衰落放大器，其功能是在切换期间以这些视频信号之间的线性转换输出第一或第二场景的视频信号。

2. 发明授权

US4285004A Total raster error correction apparatus and method for the automatic set up of television cameras and the like 失效
标题翻译：用于自动设置电视摄像机等的光栅纠错装置和方法
公开(公告)号：US4285004A
公开(公告)日：1981-08-18
申请号：US124370
申请日：1980-02-25
申请人： Eric F. Morrison , Anthony E. Zank
发明人： Eric F. Morrison , Anthony E. Zank
IPC分类号： H04N5/232 , H04N9/04 , H04N9/09 , H04N9/093 , H04N17/00 , H04N9/62
CPC分类号： H04N9/093 , H04N17/002 , H04N9/04
摘要： A total raster error measurement and correction circuitry, using digital memory means in the camera head for the storage of correction data, corrects spatial scan, shading, etc., errors in a television picture in two dimensions. The basic spatial error correction circuit effectively synthesizes horizontal rate waveforms on a number of discrete lines of the vertical scan. On all scanned lines between discrete lines, a linear approximation between the two discrete waveforms is made to form a vertically continuous waveform. Black and white shading errors are measured by comparing the black and white video levels against respective selected black and white D.C. levels with and without a cap on the camera lens. Gamma correction is provided by comparing the peak black and white levels to derive any gray level errors. The total raster error correction data are retrieved from memory and are applied to given image pickup sensors and corresponding video processing circuits in the camera head system during real time operation.
摘要翻译：总体光栅误差测量和校正电路，使用摄像头中的数字存储装置来存储校正数据，校正电视图像中的空间扫描，阴影等错误。基本空间误差校正电路有效地合成了垂直扫描的多条离散线上的水平速率波形。在离散线之间的所有扫描线上，使两个离散波形之间的线性近似形成垂直连续波形。通过将黑白视频电平与相机镜头上带有和不带盖的相应选择的黑白直流电平进行比较来测量黑白阴影误差。通过比较峰值黑白电平来提供灰度校正，以导出任何灰度级错误。从存储器检索总光栅误差校正数据，并且在实时操作期间将其应用于相机头系统中的给定图像拾取传感器和相应的视频处理电路。

3. 发明授权

US4677388A Synchronization slicer 失效
标题翻译：同步切片机
公开(公告)号：US4677388A
公开(公告)日：1987-06-30
申请号：US788356
申请日：1985-10-17
申请人： Eric F. Morrison
发明人： Eric F. Morrison
IPC分类号： H04N9/89 , G01R19/175 , H04N5/08 , H03K5/153
CPC分类号： H04N5/08 , G01R19/175
摘要： There is disclosed herein an apparatus and method for accurately ascertaining the time of occurrence of passage of the leading and trailing edges of an input pulse through the 50% amplitude level. The apparatus implements the transfer function 1 - cos(wt) where t is equal to the round trip delay through a delay line, and w is the angular velocity of each fourier component of the input signal. In one embodiment, a summing resistor and a delay line having a characteristic impedance equal to that of the resistor are used. The output of the delay line is coupled to one input of a comparator, and the other input is coupled to the junction between the summing resistor and the delay line. Another embodiment uses two matched delay lines, two factoring circuits, a summing circuit and a comparator to implement the same transfer function.
摘要翻译：这里公开了一种用于准确地确定通过50％幅度电平的输入脉冲的前沿和后沿通过的时间的装置和方法。该装置实现传递函数1-cos（wt），其中t等于通过延迟线的往返延迟，w是输入信号的每个傅立叶分量的角速度。在一个实施例中，使用加法电阻器和具有等于电阻器的特性阻抗的特性阻抗的延迟线。延迟线的输出耦合到比较器的一个输入端，另一个输入耦合到求和电阻和延迟线之间的结。另一个实施例使用两个匹配的延迟线，两个分相电路，一个求和电路和一个比较器来实现相同的传递函数。

4. 发明授权

US4575124A Reproducible gray scale test chart for television cameras 失效
标题翻译：电视摄像机可重现灰度测试图
公开(公告)号：US4575124A
公开(公告)日：1986-03-11
申请号：US591664
申请日：1984-03-20
申请人： Eric F. Morrison
发明人： Eric F. Morrison
IPC分类号： B42D15/00 , H04N17/00 , G01J1/02
CPC分类号： B42D15/00 , H04N17/002
摘要： A gray scale test chart for television cameras, in the form of either a transmittance chart or reflectance chart, includes one or more regions having selected gray values for calibrating or adjusting the output signal of the television camera, each gray value region being formed by an array of uniformly black dots arranged on a uniformly white background in a spatial frequency selected with respect to the resolution capability of the camera to produce an integrated output signal while being within the resolution capability of a photographic or other chart reproduction technique, the size of the dots in each region determining its gray value in combination with the spatial frequency or center-to-center spacing of the dots.
摘要翻译：电视摄像机的灰度测试图以透射率图或反射率图的形式包括一个或多个具有选择的灰度值的区域，用于校准或调整电视摄像机的输出信号，每个灰度值区域由排列在统一白色背景上的空间频率阵列，该空间频率相对于相机的分辨能力选择，以产生集成输出信号，同时处于照相或其它图表再现技术的分辨率能力内，每个区域中的点与空白频率或中心到中心的间距相结合确定其灰度值。

5. 发明授权

US4663654A Blanking signal generator for a subcarrier locked digital PAL signal 失效
标题翻译：消隐信号发生器用于副载波锁定数字PAL信号
公开(公告)号：US4663654A
公开(公告)日：1987-05-05
申请号：US781085
申请日：1985-09-27
申请人： Eric F. Morrison
发明人： Eric F. Morrison
IPC分类号： H04N9/64 , H04N5/067 , H04N9/44 , H04N9/804 , H04N9/808 , H04N9/89 , H04N3/24
CPC分类号： H04N9/44
摘要： Non-orthogonality of the blanking region information caused by the 25 Hz offset in a digital PAL-encoded color television signal is corrected by a dynamic offset circuit. To this end, a plurality of waveforms describing the envelopes of the blanking, sync and burst are stored, and during video signal processing are sequentially addressed at a 25 Hz rate. The resulting assembled output blanking information is orthogonal to the television scanning frequency.
摘要翻译：通过动态偏移电路来校正由数字PAL编码彩色电视信号中的25Hz偏移引起的消隐区域信息的非正交性。为此，存储描述消隐，同步和脉冲串的包络的多个波形，并且在视频信号处理期间以25Hz的速率顺序寻址。所得到的组合输出消隐信息与电视扫描频率正交。

6. 发明授权

US4519001A Apparatus for providing dropout compensation and error concealment in a PAL format video information signal 失效
标题翻译：用于在PAL格式视频信息信号中提供压差补偿和误差隐藏的装置
公开(公告)号：US4519001A
公开(公告)日：1985-05-21
申请号：US315578
申请日：1981-10-27
申请人： Eric F. Morrison
发明人： Eric F. Morrison
IPC分类号： H04N9/804 , H04N9/64 , H04N9/808 , H04N9/88 , H04N9/888 , H04N9/491
CPC分类号： H04N9/64 , H04N9/888
摘要： Apparatus is disclosed for providing error compensation of a video information signal having a PAL format. Sampling of the analog PAL format video information signal is done at a rate of four times the chrominance subcarrier frequency and is done in a precise manner whereby the samples are taken along orthogonal vector axes that are oriented at 45.degree. relative to the U and V vector axis. When samples are taken at the prescribed locations, substitute samples in the form of multi-bit digital words can be used as replacements for defective or missing sample words, which replacement samples exhibit the same vector phase as the defective sample, but which are taken from either the preceding or succeeding line relative to the line in which the defective sample is located. The apparatus of the present invention obviates the necessity of performing any arithmetic computation to derive the value for the sample to be substituted. Moreover, the sample is spatially closely related to the defective sample, i.e., it is merely spatially removed one horizontal line from the line of interest and is vertically aligned relative to the defective sample. The detection of a defective sample activates the apparatus to automatically substitute the proper digital data word sample for the defective sample. If part of or an entire line is missing or defective, the system automatically inserts an average of the preceding and succeeding line during the period of time when the missing or defective information is detected.
摘要翻译：公开了提供具有PAL格式的视频信息信号的误差补偿的装置。模拟PAL格式视频信息信号的采样以色度副载波频率的四倍的速度进行，并以精确的方式进行，从而沿着垂直矢量轴拍摄样本，其相对于U和V矢量定向在45度轴。当在规定位置拍摄样本时，以多位数字字形式替代样本可用作缺陷或丢失样本字的替代品，该替换样品与缺陷样品呈现相同的矢量相位，但取自相对于缺陷样本所在的行的前一行或后一行。本发明的装置避免了执行任何算术运算以导出待替换样本的值的必要性。此外，样品在空间上与缺陷样品密切相关，即仅在空间上从感兴趣的线移除一条水平线，并相对于有缺陷的样品垂直取向。对缺陷样品的检测激活该装置以自动地替换正确的数字数据字样本用于有缺陷的样品。如果部分或整行丢失或有缺陷，系统会在检测到丢失或缺陷信息的时间段内自动插入前一行的平均值。

7. 发明授权

US4419686A Digital chrominance filter for digital component television system 失效
标题翻译：数字分量电视系统的数字色度滤波器
公开(公告)号：US4419686A
公开(公告)日：1983-12-06
申请号：US231278
申请日：1981-02-04
申请人： Eric F. Morrison
发明人： Eric F. Morrison
IPC分类号： H03H17/00 , H03H17/02 , H04N9/64 , H04N11/04 , H04N9/32
CPC分类号： H04N9/64
摘要： A digital chrominance signal in a digital component television system is digitally filtered to obtain sampling values intermediate the sampled values obtained during analog to digital conversion of the chrominance signal, such that the resultant number of chrominance samples per second in the digitized chrominance signal corresponds with the number of luminance samples per second in the digitized luminance signal. The samples values of the digitized chrominance signal including the computed intermediate values may also be modified by said digitized filter to minimize the alias created by the analog to digital correction sampling process, to compensate this signal for sine x/x losses existing in the digitized chrominance signal, to compensate for Gaussian filter attenuation of the chrominance signal prior to analog to digital conversion thereof, and to compensate for other deficiencies in the chrominance signal. The digital filter includes a network of at least one shift register and one digital adder that continuously calculates intermediate values between successive sample values of a digital chrominance signal, and incorporates said calculated values in a resultant chrominance signal.
摘要翻译：对数字分量电视系统中的数字色度信号进行数字滤波，以获得在色度信号的模数转换期间获得的采样值之间的采样值，使得数字化色度信号中每秒的色度采样数量对应于数字化亮度信号中每秒的亮度采样数。包括所计算的中间值的数字化色度信号的采样值也可以被所述数字化滤波器修改，以使由模拟 - 数字校正采样处理产生的别名最小化，以补偿该信号用于数字化色度中存在的正弦x / x损耗信号，以在其模数转换之前补偿色度信号的高斯滤波器衰减，并补偿色度信号中的其它缺陷。数字滤波器包括至少一个移位寄存器和一个数字加法器的网络，其连续计算数字色度信号的连续采样值之间的中间值，并将所计算的值合并到所得到的色度信号中。

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