公开(公告)号：US06738097B2

公开(公告)日：2004-05-18

申请号：US09829940

申请日：2001-04-11

申请人： Yasunori Satoh

发明人： Yasunori Satoh

IPC分类号： H04N978

CPC分类号： H04N9/78

摘要： The decoder for separation of Y (luminance) signals and C (color) signals from composite signals includes a correlation judging section. It is adapted to judge whether there is line correlation among neighboring signal lines including a signal line to be separated during each of the horizontal scanning intervals. A stripe component judging section is adapted to judge whether an image having vertical stripes is contained in the composite signal. A filter section having first and second filters is used selectively depending on correlation results, and a selecting section is adapted to output a signal to select one of filters in accordance with judgment results from both judging sections. The decoder is capable of preventing decreases in resolution in images having vertical stripes.

摘要翻译： 用于从复合信号分离Y（亮度）信号和C（彩色）信号的解码器包括相关判断部分。 适于判断在每个水平扫描间隔期间包括要分离的信号线的相邻信号线之间是否存在线相关性。 条带分量判定部分，用于判断复合信号中是否包含具有垂直条纹的图像。 具有第一和第二滤波器的滤波器部分根据相关结果选择性地使用，并且选择部分根据两个判断部分的判断结果输出信号以选择一个滤波器。 解码器能够防止具有垂直条纹的图像中的分辨率降低。

公开(公告)号：US06462790B1

公开(公告)日：2002-10-08

申请号：US09637140

申请日：2000-08-11

申请人： Virgil L. Lowe ,  John W. Curtis

发明人： Virgil L. Lowe ,  John W. Curtis

IPC分类号： H04N978

CPC分类号： H04N9/896 ,  H04N9/78

摘要： A digital comb filter for decoding composite video signals into a luminance and a chrominance component. A Fast Fourier Transform (FFT) circuit or a band split filter circuit is used to determine important characteristics of an input video signal without demodulating the video signal. The circuits produce a signature signal by which each of the video lines can be correlated. Signature signals on various surrounding video lines that are of opposite subcarrier phase with the current line are compared to determine similarity and appropriate weighting coefficients for the surrounding lines. If none of the surrounding lines are similar, the comb reverts to a band split filter to form chrominance. A noise measure circuit determines an error signal input used to adjust the weighting coefficients as the noise level increases or decreases. Multiplexer combines high pass and low pass taps of a band split filter into a single data stream. Line delays, together with field delay memories, provide the interlaced line above and below the current line. for the comb filter. Interframe motion detector gives priority to the frame comb signal when no motion is detected between the current line and the frame delayed signal in the same vertical position as the current line. Dynamic threshold modification is used to suppress unwarranted comb filter failures in the presence of luma edges.

摘要翻译： 一种用于将复合视频信号解码为亮度和色度分量的数字梳状滤波器。 使用快速傅里叶变换（FFT）电路或频带分割滤波电路来确定输入视频信号的重要特性，而不解调视频信号。 这些电路产生签名信号，通过该信号可以将每个视频行相关联。 将与当前行相反的副载波相位的各种周围视频线上的签名信号进行比较，以确定周围线的相似度和适当的加权系数。 如果周围的线都不相似，则梳状器返回到带状分割滤波器以形成色度。 噪声测量电路确定用于在噪声电平增加或减小时调整加权系数的误差信号输入。 多路复用器将频带分离滤波器的高通和低通抽头组合成单个数据流。 线路延迟与场延迟存储器一起提供了当前行之上和之下的隔行线。 用于梳状滤波器。 当在当前行和当前行的相同垂直位置中的帧延迟信号之间没有检测到运动时，帧间运动检测器优先考虑帧梳状信号。 动态阈值修改用于在亮度边缘的存在下抑制无理的梳状滤波器故障。

公开(公告)号：US06717623B2

公开(公告)日：2004-04-06

申请号：US09864170

申请日：2001-05-25

申请人： Tetsuo Mise ,  Yukio Mori ,  Seiji Okada

发明人： Tetsuo Mise ,  Yukio Mori ,  Seiji Okada

IPC分类号： H04N978

CPC分类号： H04N9/045 ,  H04N2209/046

摘要： In a color separator circuit, edge detection filters detect an edge encountered in the horizontal direction. When the image signals corresponding to the thus detected edge are processed, selector circuits 12a to 12c select outputs from small-tap-number color separation filters 8a to 8c and 10a to 10c, respectively. When the image signals corresponding to the remaining portion other than the edge are processed, the selector circuits 12a to 12c select outputs from large-tap-number color separation filters 9a to 9c and 11a to 11c, respectively. A ratio calculator circuit 16 calculates, from the luminance signals fed from adder circuits 13a to 13c, the value by which a multiplier circuit 18 performs multiplication. The multiplier circuit 18 multiplies, by this value calculated by the ratio calculator circuit 16, the color separation signals added together by an adder circuit 17 so that, of all the color separation signals of which there are two kinds, those of one kind are vertically interpolated.

摘要翻译： 在色分离器电路中，边缘检测滤波器检测在水平方向上遇到的边缘。 当处理对应于这样检测到的边缘的图像信号时，选择器电路12a至12c分别选择小抽头色分离滤光器8a至8c和10a至10c的输出。 当处理与边缘以外的剩余部分相对应的图像信号时，选择器电路12a至12c分别从大抽头数分色滤光器9a至9c和11a至11c选择输出。 比率计算器电路16根据从加法器电路13a至13c馈送的亮度信号计算乘法电路18进行乘法的值。 乘法器电路18乘以由比例计算器电路16计算的该值，由加法器电路17相加在一起的色分离信号，使得其中一种颜色分离信号有两种，垂直方向 插值

公开(公告)号：US06201583B1

公开(公告)日：2001-03-13

申请号：US09086469

申请日：1998-05-28

申请人： Satoru Kuwabara

发明人： Satoru Kuwabara

IPC分类号： H04N978

CPC分类号： H04N5/18

摘要： In an image signal input apparatus that performs high-speed input processing of an image signal and, in particular, a brightness signal, a video signal is processed by a clamping circuit so as to achieve a constant reference level, and then input to an A/D converter. The A/D converter samples the video signal synchronously with a clock signal of a frequency 4fsc. The output of the A/D converter is input to a selector directly or via a 4-data arithmetic mean circuit. The 4-data arithmetic mean circuit obtains an arithmetic mean of every four consecutive data output from the A/D converter. The obtained 4-data arithmetic mean data correspond to the brightness signal. After the 4-data arithmetic mean data is stored in a memory through a DMA controller, the data is output to a personal computer via a Centronics® interface, thereby reducing the amount of data memory necessary for input processing to a quarter of the normal amount.

摘要翻译： 在执行图像信号的高速输入处理，特别是亮度信号的图像信号输入装置中，由钳位电路处理视频信号，以获得恒定的参考电平，然后输入到A / D转换器。 A / D转换器与频率为4fsc的时钟信号同步对视频信号进行采样。 A / D转换器的输出直接或通过4数据运算平均电路输入到选择器。 4数据算术平均电路获得从A / D转换器输出的每四个连续数据的算术平均值。 获得的4数据算术平均数据对应于亮度信号。 在4数据运算之后，通过DMA控制器将数据平均数据存储在存储器中，数据通过Centronics（R）接口输出到个人计算机，从而将输入处理所需的数据存储量减少到四分之一 正常量

公开(公告)号：US06833875B1

公开(公告)日：2004-12-21

申请号：US09387389

申请日：1999-09-02

申请人： Feng Yang ,  Chi-Hao Yang ,  Feng Kuo ,  Chien-Chung Huang ,  Jao-Ching Lin

发明人： Feng Yang ,  Chi-Hao Yang ,  Feng Kuo ,  Chien-Chung Huang ,  Jao-Ching Lin

IPC分类号： H04N978

CPC分类号： H04N5/208 ,  H04N9/646

摘要： A video decoder for decoding a composite video signal. The decoder includes an analog-to-digital converter (ADC), an input resampler, and a Y/C separator, all coupled in series. The ADC receives and digitizes the composite video signal to generate ADC samples. The input resampler receives and resamples the ADC samples with a first resampling signal to generate resampled video samples. The Y/C separator receives and separates the resampled video samples into luminance and chrominance components. The Y/C separator includes a delay element configured to receive the resampled video samples and provide a variable amount of delay. The variable amount of delay can be adjustable from line to line, and is typically based on an approximated duration of a video line. For an NTSC signal, the variable delay is select to be (m·n+m/2) samples, where m is a ratio of frequencies of the resampling signal and a color subcarrier of the composite video signal, and n is an integer selected such that (m·n+m/2) samples most approximate the duration of a video line. For a PAL signal, the variable delay is selected to be (m·n+3m/4) samples.

摘要翻译： 一种解码复合视频信号的视频解码器。 解码器包括所有串联耦合的模数转换器（ADC），输入重采样器和Y / C分离器。 ADC接收并数字化复合视频信号以产生ADC采样。 输入重采样器用第一个重采样信号接收并重采样ADC采样，以产生再采样的视频采样。 Y / C分离器将再采样的视频样本接收并分离为亮度和色度分量。 Y / C分离器包括被配置为接收重采样的视频样本并提供可变量的延迟的延迟元件。 可变量的延迟可以从一行到另一个可调节，并且通常基于视频行的近似持续时间。 对于NTSC信号，可变延迟选择为（m.n + m / 2）个样本，其中m是复合视频信号的重采样信号和彩色副载波的频率比，并且n是选择的整数 使得（m.n + m / 2）样本最接近视频行的持续时间。 对于PAL信号，可变延迟选择为（m.n + 3m / 4）样本。

公开(公告)号：US06809778B2

公开(公告)日：2004-10-26

申请号：US09901976

申请日：2001-07-10

申请人： Ryuichi Shibutani ,  Nobuo Taketani

发明人： Ryuichi Shibutani ,  Nobuo Taketani

IPC分类号： H04N978

CPC分类号： H04N9/78

摘要： Disclosed are an apparatus and a method for YC separation and three-line correlation detection with high accuracy, which allow the YC separator to generate reliable Y signals. The correlation detecting apparatus includes a sub-correlation detector. The detector checks input signals for the presence or absence of vertical correlation, and provides the signals with a judgment “high-correlation exists” or “otherwise”. According to the judgment, the correlation detecting apparatus changes the process; i) when accepted the judgment “high-correlation exists”, the apparatus determines the judgment to be reliable and adopts it as the output, ii) when accepted “otherwise”, the apparatus increases its detecting accuracy and provides the signals with multi-leveled outputs according to the correlation levels. In this way, the main apparatus switches the detecting mode according to the result from sub-correlation detector, with the detecting accuracy greatly improved. This also allows the YC separator to flexibly cope with input signals.

摘要翻译： 本发明公开了一种高精度YC分离和三线相关检测的装置和方法，其允许YC分离器产生可靠的Y信号。 相关检测装置包括子相关检测器。 检测器检查输入信号是否存在垂直相关性，并且向信号提供具有“高相关性存在”或“否则”的判断。 根据该判断，相关检测装置改变处理。 i）当接受判断“高相关存在”时，设备将判断确定为可靠并将其作为输出，ii）当接受“否”时，设备增加其检测精度，并提供多层次的信号 输出根据相关级别。 以这种方式，主设备根据子相关检测器的结果切换检测模式，检测精度大大提高。 这也允许YC分离器灵活地处理输入信号。

公开(公告)号：US06300985B1

公开(公告)日：2001-10-09

申请号：US09523889

申请日：2000-03-13

申请人： Virgil L. Lowe ,  John W. Curtis

发明人： Virgil L. Lowe ,  John W. Curtis

IPC分类号： H04N978

CPC分类号： H04N9/78 ,  H04N9/896

摘要： A composite video decoder that separates digitized composite video signals into luminance and chrominance, demodulates the chrominance signal to its R-Y and B-Y components, removes time base errors, synchronizes the output to the station reference signal and converts three parallel digital signals to a serial digital output signal. A three dimensional digital comb filter, an interpolation circuit for time base correction, a sync error detector circuit, a noise measurement circuit and a means of using the noise measurement level to adapt the other circuits for best operation at various noise levels of the video input signal provide high quality translation from a composite video input to a serial digital interface output (SDI). A digital line recursive filter is used to extract the horizontal synchronizing signal whether the signal is clean or masked by a very high noise level riding on the video signal.

摘要翻译： 将数字化复合视频信号分离为亮度和色度的复合视频解码器，将色度信号解调为其RY和BY分量，消除时基误差，将输出与站参考信号同步，并将三个并行数字信号转换为串行数字输出 信号。 三维数字梳状滤波器，用于时基校正的内插电路，同步误差检测器电路，噪声测量电路和使用噪声测量电平的装置来适应其他电路以在视频输入的各种噪声电平下的最佳操作 信号提供从复合视频输入到串行数字接口输出（SDI）的高质量转换。 使用数字线递归滤波器来提取水平同步信号，无论信号是否被视频信号上的非常高的噪声电平干净或掩蔽。

公开(公告)号：US06175389B1

公开(公告)日：2001-01-16

申请号：US09244642

申请日：1999-02-04

申请人： Benjamin E. Felts, III ,  John E. Welch

发明人： Benjamin E. Felts, III ,  John E. Welch

IPC分类号： H04N978

CPC分类号： H04N9/78

摘要： An adaptive signal separation system and method for quadrature amplitude modulated signals that is particularly well-suited for YC separation of a composite television signal. An adaptive approach for separating overlapping signals wherein the adaptive approach selects between notch or equivalent filtering and a comb filtering system, wherein the chrominance is first demodulated to the IQ domain prior to comb filtering. The demodulated comb filtered IQ data streams are then re-modulated to reconstruct the luminance portion of the signal.

摘要翻译： 一种用于正交幅度调制信号的自适应信号分离系统和方法，其特别适用于复合电视信号的YC分离。 一种用于分离重叠信号的自适应方法，其中自适应方法在陷波或等效滤波之间选择梳状滤波系统，其中在梳状滤波之前，色度首先被解调到IQ域。 经解调的梳状滤波IQ数据流然后被重新调制以重构信号的亮度部分。

公开(公告)号：US06771321B2

公开(公告)日：2004-08-03

申请号：US10004585

申请日：2001-12-03

申请人： Aleksandr M. Movshovich ,  Brad A. Delanghe

发明人： Aleksandr M. Movshovich ,  Brad A. Delanghe

IPC分类号： H04N978

CPC分类号： H04N9/78

摘要： A method and system for performing combing for PAL luma data is disclosed. The combing is performed for a display having a plurality of lines. The display is capable of depicting a frame including a horizontal boundary having a top edge and a bottom edge. A top line of the plurality of lines is at the top edge of the horizontal boundary. A bottom line of the plurality of lines is at the bottom edge of the horizontal boundary. The method and system includes providing a feedback multiplexer, a line delay and a feed forward multiplexer. The feedback multiplexer has a first input, a second input and a first output. The first input is for receiving luma data for a current line. The line delay has a delay input and a delay output, the delay input coupled with the first output. The delay output is coupled with the second input. The feed forward multiplexer has a third input, a fourth input and a second output. The third input is coupled with the delay output. The fourth input is for receiving the luma data for the current line. The feedback multiplexer is controlled to provide fedback luma data from the second input to the first output when the current line is the top line and to provide the luma data for the current line from the first input to the first output otherwise. The feed forward multiplexer is controlled to provide next line luma data from the fourth input to the second output when the current line is the bottom line and to provide the luma data from the current line to the second output otherwise.

摘要翻译： 公开了一种用于对PAL亮度数据执行梳理的方法和系统。 针对具有多行的显示器执行梳理。 显示器能够描绘包括具有顶部边缘和底部边缘的水平边界的框架。 多条线的顶线位于水平边界的顶边。 多条线的底线位于水平边界的底边。 该方法和系统包括提供反馈多路复用器，线路延迟和前馈复用器。 反馈多路复用器具有第一输入，第二输入和第一输出。 第一个输入是用于接收当前行的亮度数据。 线路延迟具有延迟输入和延迟输出，延迟输入与第一个输出耦合。 延迟输出与第二输入耦合。 前馈复用器具有第三输入，第四输入和第二输出。 第三个输入与延迟输出相结合。 第四个输入是用于接收当前行的亮度数据。 控制反馈多路复用器以当当前行是顶行时从第二输入到第一输出提供反馈亮度数据，并且为当前行提供从第一输入到第一输出的亮度数据。 控制前馈多路复用器，以在当前行为底行时提供从第四输入到第二输出的下一行亮度数据，并将亮度数据从当前行提供给第二输出。

公开(公告)号：US06667776B1

公开(公告)日：2003-12-23

申请号：US09093876

申请日：1998-06-09

申请人： Masatoshi Sumiyoshi ,  Naoki Mazda ,  Hitoshi Kawabata ,  Seiichi Tanaka ,  Kazumasa Ikeda

发明人： Masatoshi Sumiyoshi ,  Naoki Mazda ,  Hitoshi Kawabata ,  Seiichi Tanaka ,  Kazumasa Ikeda

IPC分类号： H04N978

CPC分类号： H04N9/78

摘要： A video signal processor, having an input receiving unit for selectively receiving either of a baseband video signal and a composite video signal are selectively input as an input video signal thereto, a 1H delay unit for delaying the selected input video signal by one line period (1H), an inter-line non-correlation component extractor for extracting inter-line non-correlation components between the input video signal and the 1H delay signal from the 1H delay unit, an inter-frame non-correlation component remover for removing inter-frame non-correlation components from the selected input video signal, a first subtractor responsive to the selection of the baseband video signal for subtracting the inter-line non-correlation component from the baseband video signal processed the inter-frame non-correlation component removal at the inter-frame non-correlation component removing means to result noise-reduced baseband video signals, a second subtractor responsive to the selection of the composite video signal the inter-line non-correlation component from the input composite video signal to result a first luminance signal, and a mixer for mixing a second luminance signal resulted from the inter-frame non-correlation component removal at the inter-frame non-correlation component remover with the first luminance signal from the second subtractor at a ratio defined by a motion signal to result a motion-adaptively processed luminance signal.

摘要翻译： 选择性地输入具有选择性地接收基带视频信号和复合视频信号中的任一个的输入接收单元的视频信号处理器作为输入视频信号; 1H延迟单元，用于将所选择的输入视频信号延迟一行周期（ 1H），用于提取输入视频信号和来自1H延迟单元的1H延迟信号之间的线间非相关分量的线间非相关分量提取器，用于去除帧间非相关分量去除器， 来自所选择的输入视频信号的帧非相关分量;响应于选择基带视频信号的第一减法器，用于从基带视频信号中减去线间非相关分量，处理帧间非相关分量去除 所述帧间非相关分量消除装置用于产生噪声降低的基带视频信号，第二减法器响应于所述comp的选择 osite视频信号从输入的复合视频信号中产生线间非相关分量，以得到第一亮度信号;以及混合器，用于混合由帧间非相关分量去除而产生的第二亮度信号， 相关分量去除器，其具有来自第二减法器的第一亮度信号，以由运动信号定义的比例，以产生运动自适应处理的亮度信号。