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公开(公告)号：US5173774A
公开(公告)日：1992-12-22
申请号：US629523
申请日：1990-12-18
申请人： Wayne E. Bretl , Paul A. Snopko
发明人： Wayne E. Bretl , Paul A. Snopko
摘要： A dual purpose receiver can receive and process either 525-line NTSC signals or 787.5-line HDTV signals without the use of costly interlace-to-progressive scan conversion circuitry. The 525-line signal can either be stored a line at a time and repeated twice to create a 1575-line format, or it can also interpolate values based on the two adjacent received lines to create a form of averaging in the 1575-line format. The invention is not restricted to use with NTSC/HDTV systems.
摘要翻译： 双用途接收机可以接收和处理525行NTSC信号或787.5行HDTV信号，而无需使用昂贵的交错逐行扫描转换电路。 525行信号可以一次存储一行，重复两次以创建1575行格式，或者也可以根据两个相邻的接收行内插值，以创建1575行格式的平均形式 。 本发明不限于与NTSC / HDTV系统一起使用。
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公开(公告)号：US06765508B2
公开(公告)日：2004-07-20
申请号：US10674191
申请日：2003-09-29
申请人： Wayne E. Bretl , Timothy G. Laud
发明人： Wayne E. Bretl , Timothy G. Laud
IPC分类号： H03M700
CPC分类号： H03M7/3082 , H03M13/00 , H04L1/0041 , H04L1/0071 , H04L27/02 , H04N21/2383 , H04N21/4382
摘要： A field contains a map, a number of E-VSB data segments, and a number of VSB data segments. The map indicates at least the number of E-VSB data segments in the field. The E-VSB data segments are located in the field such that the spacing between the E-VSB segments comprises only x and x+1, where x is dependent on the number of E-VSB data segments in the field as indicated by the map.
摘要翻译： 字段包含映射，多个E-VSB数据段和多个VSB数据段。 该地图至少指示该领域中的E-VSB数据段的数目。 E-VSB数据段位于场中，使得E-VSB段之间的间隔仅包括x和x + 1，其中x取决于场中的E-VSB数据段的数目，如地图所示 。
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公开(公告)号：US4554581A
公开(公告)日：1985-11-19
申请号：US701713
申请日：1985-02-14
CPC分类号： H04N7/1675 , H04N7/1713
摘要： An addressable subscription television decoder includes an input stage including an IF amplifier for converting a scrambled RF television signal to a composite baseband video signal. The baseband video signal comprises either a nominal sync component or a sync component having suppressed horizontal sync pulses during video fields and having non-suppressed sync pulses during vertical intervals, the vertical intervals also including selected encoded data signals. An AGC voltage for controlling the gain of the IF amplifier is developed by a circuit exhibiting a relatively short time constant whenever the composite baseband video signal is characterized by nominal level sync pulses, the time constant being increased in response to suppressed horizontal sync pulses. The sync pulses produced during the vertical intervals of the composite baseband video signal are thereby not subjected to excessive IF gain for facilitating processing of the data signals by the decoder.
摘要翻译： 一种可寻址的订阅电视解码器包括：输入级，包括用于将加扰的RF电视信号转换成复合基带视频信号的IF放大器。 基带视频信号包括在视频场期间具有抑制的水平同步脉冲的标称同步分量或同步分量，并且在垂直间隔期间具有非抑制的同步脉冲，垂直间隔还包括所选择的编码数据信号。 只要合成基带视频信号由标称电平同步脉冲表征，时间常数响应于抑制的水平同步脉冲而增加，用于控制IF放大器增益的AGC电压由具有较短时间常数的电路开发。 因此，在复合基带视频信号的垂直间隔期间产生的同步脉冲不会受到过度的IF增益，以便于解码器处理数据信号。
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公开(公告)号：US4486782A
公开(公告)日：1984-12-04
申请号：US385635
申请日：1982-06-07
申请人： Wayne E. Bretl , Victor G. Mycynek
发明人： Wayne E. Bretl , Victor G. Mycynek
IPC分类号： H04N5/62
CPC分类号： H04N5/62
摘要： A system and method for stabilizing a voltage controlled oscillator (VCO) in an FM modulator is disclosed. The frequencies of a reference carrier and the VCO are sequentially detected in the same frequency discriminator, sampled and stored for later comparison in generating an error signal representing the average frequency difference between these two signals. This error signal is then summed with detected audio information and provided to the VCO as a correction signal for matching the VCO's frequency with the reference frequency of the carrier. VCO signal instabilities due to system drift are thus eliminated for improved signal processing. A time-based switching approach is utilized for sequentially detecting and sampling the reference carrier and the VCO output. One embodiment of the invention utilizes AC coupling in the correction signal feedback loop eliminating DC signal drift and improving system operating stability. The present invention is particularly adapted for operation in a signal decoder such as utilized in a frequency modulated subscription television system wherein the audio carrier is processed and provided to a conventional television receiver.
摘要翻译： 公开了一种用于稳定FM调制器中的压控振荡器（VCO）的系统和方法。 参考载波和VCO的频率在相同的鉴频器中被顺序地检测，采样和存储以用于稍后的比较，以产生表示这两个信号之间的平均频率差的误差信号。 然后将该误差信号与检测到的音频信息相加并提供给VCO，作为用于使VCO的频率与载波的参考匹配的校正信号。 因此消除了由于系统漂移引起的VCO信号不稳定性，以改善信号处理。 基于时间的切换方法被用于依次检测和采样参考载波和VCO输出。 本发明的一个实施例利用校正信号反馈环路中的AC耦合来消除DC信号漂移并提高系统的运行稳定性。 本发明特别适用于信号解码器中的操作，例如在频率调制的订购电视系统中使用的，其中音频载波被处理并提供给传统的电视接收机。
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公开(公告)号：US4342048A
公开(公告)日：1982-07-27
申请号：US179368
申请日：1980-08-18
申请人： Scott L. Falater , Wayne E. Bretl
发明人： Scott L. Falater , Wayne E. Bretl
IPC分类号： H04N5/68
CPC分类号： H04N5/68
摘要： An automatic CRT tracking circuit for a television receiver includes an amplifier having adjustable gain and offset transfer functions for coupling a video signal to the cathode of the CRT electron gun. Feedback loops are used to adjust both the gain and offset transfer functions of the amplifier, either independently of each other or in a common mode, to compensate for changing cathode voltage versus cathode current characteristics such that a desired video signal versus cathode current relationship is achieved despite variations in the CRT.
摘要翻译： 用于电视接收机的自动CRT跟踪电路包括具有可调增益和偏移传递功能的放大器，用于将视频信号耦合到CRT电子枪的阴极。 反馈回路用于调节放大器的增益和偏移传递函数，彼此独立或共同模式，以补偿阴极电压与阴极电流特性的变化，从而实现所需的视频信号与阴极电流的关系 尽管CRT有变化。
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36.发明授权Mode decision controller for selectively actuating a chrominance bandwith enhancement in a television receiver 失效模式决定控制器，用于在电视接收机中选择性地启动色度带宽增强
公开(公告)号：US4331971A
公开(公告)日：1982-05-25
申请号：US208211
申请日：1980-11-19
申请人： Wayne E. Bretl
发明人： Wayne E. Bretl
CPC分类号： H04N9/77
摘要： A mode decision controller is described for actuating a conventional chrominance bandwith enhancement scheme in a color television receiver. A video signal detected by the receiver typically includes a relatively wide band luminance element and a relatively narrow band chrominance element, each of which are processed by the enhancement scheme to develop their first derivatives for use in enhancing the bandwith of the chrominance element. Either of these derivatives may be used as an input to the mode decision controller. The selected derivative is applied to a filter for removing components therefrom which extend above a given frequency range, thereby developing a frequency-limited output signal whose time domain exceeds the time domain of the selected first derivative. A signal processor receives the frequency-limited output signal and compresses its time domain to develop a control signal whose time domain is substantially equivalent to the time domain of the selected first derivative. The control signal is then used to activate the enhancement scheme.
摘要翻译： 描述了用于在彩色电视接收机中启动具有增强方案的常规色度带宽的模式决策控制器。 由接收机检测到的视频信号通常包括相对较宽的频带亮度元素和相对较窄的频带色度元素，每个元素都被增强方案处理，以开发出其第一个导数，用于增强色度元素的带宽。 这些导数中的任何一个可以用作模式决策控制器的输入。 选择的导数应用于滤波器，用于从其上移除在其上延伸到给定频率范围之外的分量，由此开发出其时域超过所选择的一阶导数的时域的频率限制输出信号。 信号处理器接收频率限制输出信号并压缩其时域以产生其时域基本上等于所选择的一阶导数的时域的控制信号。 然后控制信号用于激活增强方案。
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公开(公告)号：US09219629B1
公开(公告)日：2015-12-22
申请号：US14470413
申请日：2014-08-27
申请人： Ning Sun , Wayne E. Bretl , Nejib Ammar
发明人： Ning Sun , Wayne E. Bretl , Nejib Ammar
CPC分类号： H04L25/0206 , H04L27/2655
摘要： Adaptive low complexity minimum mean square error (MMSE) channel estimator for OFDM systems operating over mobile channel. Complexity of the estimator is reduced by partitioning sub-carriers into windows where, window size is optimized by considering channel model mismatch error (MME). Three types of adaptive windowed MMSE (W-MMSE) estimators include: A first type, a simplified delay profile applied as channel reference model, and optimum window size adaptive to the estimated signal-to-noise ratio. A second type, a group of candidate channel reference models are considered. The receiver roughly estimates and selects current reference model from candidate group, then adapts optimum window size based on the estimated SNR and selected channel model. A third type, the current channel statistics are finely estimated and window size is iteratively optimized at receiver. The first two adaptive W-MMSE estimators are tolerant to channel model mismatch error and the third captures channel variations to realize real-time estimation.
摘要翻译： 用于通过移动通道运行的OFDM系统的自适应低复杂度最小均方误差（MMSE）信道估计器。 通过将子载波划分为窗口来减少估计器的复杂性，其中通过考虑信道模型不匹配错误（MME）优化窗口大小。 三种类型的自适应窗口MMSE（W-MMSE）估计器包括：第一类型，作为信道参考模型应用的简化延迟分布，以及自适应估计信噪比的最佳窗口大小。 考虑第二类型，一组候选通道参考模型。 接收机粗略地估计并从候选组中选择当前参考模型，然后根据估计的SNR和所选择的信道模型来适应最优窗口大小。 第三种类型，精细估计当前的信道统计量，并在接收端迭代优化窗口大小。 前两个自适应W-MMSE估计器容忍信道模型失配误差，第三个捕获信道变化以实现实时估计。
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公开(公告)号：US5475438A
公开(公告)日：1995-12-12
申请号：US221133
申请日：1994-03-31
申请人： Wayne E. Bretl
发明人： Wayne E. Bretl
摘要： A pixel interpolation system for developing progressive line scan video from two interlaced fields of video. An intrafield pixel value is determined by averaging the pixel in the line above and the line below the desired pixel. A motion value is determined by averaging the pixels in the line above and the line below the desired pixel in corresponding fields one frame before and one frame after the desired pixel, subtracting the intrafield pixel value therefrom and comparing these values with the difference of the pixels in the same spatial relationship as the desired pixel, but one field earlier and one field later. The motion value is taken as the largest of the individual values that are determined. An interfield pixel value is determined by comparing the intrafield pixel value with the corresponding pixels in the previous and subsequent frames. The motion value is used to proportion the intrafield and interfield pixel values to generate the desired pixel. A one field delay is introduced before using the interpolated pixel to check for a scene change.
摘要翻译： 一种用于从两个交错视频领域开发逐行扫描视频的像素内插系统。 通过对上述行中的像素和期望像素之下的线进行平均来确定场内像素值。 运动值通过将上述行中的像素和在期望像素之前一帧的相应场中的期望像素下面的线平均化，并且从期望像素之后的一帧中减去其中的像素值，并将这些值与像素的差值进行比较 与所需像素具有相同的空间关系，但是较早和一个场之后的一个场。 运动值被视为确定的最大值。 通过将场内像素值与前一帧和后续帧中的相应像素进行比较来确定场间像素值。 使用运动值来比较场内和场间像素值以产生期望的像素。 在使用内插像素检查场景变化之前，引入一场延迟。
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公开(公告)号：US4829523A
公开(公告)日：1989-05-09
申请号：US121983
申请日：1987-11-18
申请人： Wayne E. Bretl
发明人： Wayne E. Bretl
CPC分类号： H03M13/00 , G11B20/1876
摘要： Masking is provided for any block of a transmitted digital signal which includes error signals caused by noise in the transmission channel. The digital signal may be an analog signal which has been digitized. When an erroneous block is detected, a masking signal is developed which is substituted for at least the erroneous block. The masking signal starts with the final value of the last error-free block and decays exponentially from that value until no longer needed. The substitution will continue through the erroneous block and may continue until the value of the substitute signal approaches the concurrent value of the subsequent signal block or until the values of the two signals actually crossover, or until there is a crossover with the slopes of the two signals having the same direction, i.e., rising or falling.
摘要翻译： 传输数字信号的任何块都包含掩蔽，包括由传输信道中的噪声引起的误差信号。 数字信号可以是已被数字化的模拟信号。 当检测到错误的块时，开发出至少代替错误块的掩蔽信号。 屏蔽信号以最后一个无错误块的最终值开始，并从该值指数衰减到不再需要。 替代将通过错误的块继续，并且可以继续，直到替代信号的值接近后续信号块的并发值，或者直到两个信号的值实际上交叉，或者直到与两个斜率的交叉 具有相同方向的信号，即上升或下降。
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公开(公告)号：US4296435A
公开(公告)日：1981-10-20
申请号：US179142
申请日：1980-08-18
CPC分类号： H04N5/208
摘要： A luminance signal processing circuit for a television receiver comprises means for separating a full bandwidth luminance signal into a low pass component and first and second derivative components of the low pass component. A differential amplifier is responsive to the component voltage signals for developing first and second current mode signals representing in phase and 180.degree. out of phase combinations of the low pass and second derivative components. The levels of the second derivative components of the first and second current mode signals are selectively adjusted by a peaking signal processor for developing related third and fourth current mode signals whose amplitudes are also selectively adjusted by a picture signal processor for developing an output luminance voltage having selectively controlled contrast and peaking components. A peak white limiter is responsive to white going portions of the second derivative components of the third and fourth current mode signals for automatically causing a corresponding reduction in the level of the output luminance voltage. Finally, a single supply of DC potential is coupled to the picture signal processor for supplying the bias energy from which the first, second, third and fourth current mode signals are derived.
摘要翻译： 一种用于电视接收机的亮度信号处理电路，包括用于将全带宽亮度信号分离成低通分量的低通分量和低通分量的第一和第二导数分量的装置。 差分放大器响应于分量电压信号，用于开发表示低通和二阶导数分量的同相和180°异相组合的第一和第二电流模式信号。 第一和第二电流模式信号的二阶导数分量的电平由峰值信号处理器选择性地调节，用于开发相关的第三和第四电流模式信号，其幅度也被图像信号处理器选择性地调整，以便开发具有 选择性地控制对比度和峰值部件。 峰值白限制器响应于第三和第四电流模式信号的二次导数分量的白色部分，以自动地使输出亮度电压的电平相应降低。 最后，单电源电压耦合到图像信号处理器，用于提供源于第一，第二，第三和第四电流模式信号的偏置能量。
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