公开(公告)号：US4731656A

公开(公告)日：1988-03-15

申请号：US880321

申请日：1986-06-30

申请人： Robert A. Dischert ,  Allen L. Limberg

发明人： Robert A. Dischert ,  Allen L. Limberg

IPC分类号： H04N5/359 ,  H04N5/361 ,  H04N5/372 ,  H04N5/3722 ,  H04N5/3725 ,  H04N5/378 ,  H04N3/14

CPC分类号： H04N5/3725 ,  H04N5/3595 ,  H04N5/361 ,  H04N5/3722

摘要： A field transfer imager is erased after every field transfer, prior to a new field of pixels-descriptive charge packet being accumulated in the successive charge transfer stages of the charge transfer channels of the image register. The image register is operated to supply a field of "null" charge packets for each field of pixel-descriptive charge packets it supplies. The "null" charge packets and pixel-descriptive charge packets are temporarily stored in respective field storage registers, and converted a line at a time to serial format for sensing. The resulting "null" samples and pixel-descriptive samples are differentially combined to provide pixel-descriptive samples with suppressed dark current ramp components and, assuming field-rate shuttering of the imager is not used, with suppressed transfer smear components.

摘要翻译： 在场图像寄存器的电荷转移通道的连续电荷转移阶段中积累的像素描述性电荷分组的新场之前，场传输成像器被擦除。 操作图像寄存器以为其提供的像素描述性电荷包的每个场提供“空”电荷包的字段。 “零”电荷分组和像素描述性电荷分组临时存储在相应的现场存储寄存器中，并且每次将一行转换成用于感测的串行格式。 所得到的“零”样本和像素描述样本被差分组合以提供具有抑制的暗电流斜坡分量的像素描述样本，并且假设不使用成像器的场速率快门，具有抑制的转移拖尾分量。

公开(公告)号：US5555024A

公开(公告)日：1996-09-10

申请号：US524488

申请日：1995-09-07

申请人： Allen L. Limberg

发明人： Allen L. Limberg

IPC分类号： H04H20/31 ,  H04N7/08

CPC分类号： H04N7/0803 ,  H04H20/31 ,  H04N7/08

摘要： An NTSC television signal transmitter also transmits through the same transmission channel a suppressed data carrier having a frequency differing from that of video carrier, having a symbol rate that is a multiple of horizontal scanning rate of video signal, having data frames occurring at a data frame rate that is the same as the video frame rate, and transmitting the symbols transmitted in each of alternate data frames in opposite phase during the next data frame. The data carrier has no image on the other side of the video carrier and preferably its modulation spectrum overlaps the video carrier. A digital-signal receiver can recover data from such a data carrier buried in an NTSC television signal, using frame-comb filtering to separate data from interfering video signal.

摘要翻译： NTSC电视信号发射机还通过相同的传输信道发送具有与视频载波频率不同的频率的抑制数据载波，其具有作为数据帧出现的数据帧的视频信号的水平扫描速率的倍数的符号率 速率与视频帧速率相同，并且在下一个数据帧期间以相反的相位发送在每个替代数据帧中发送的符号。 数据载体在视频载体的另一侧没有图像，并且优选地其调制频谱与视频载体重叠。 数字信号接收机可以使用帧梳状滤波从埋藏在NTSC电视信号中的数据载体恢复数据，以将数据与干扰视频信号分开。

公开(公告)号：US5500739A

公开(公告)日：1996-03-19

申请号：US59765

申请日：1993-05-11

申请人： Christopher H. Strolle ,  Chandrakant B. Patel ,  Werner F. Wedam ,  Raymond Schnitzler ,  Hermann J. Weckenbrock ,  Jung-Wan Ko ,  Jong-Kwung Yun ,  Allen L. Limberg

发明人： Christopher H. Strolle ,  Chandrakant B. Patel ,  Werner F. Wedam ,  Raymond Schnitzler ,  Hermann J. Weckenbrock ,  Jung-Wan Ko ,  Jong-Kwung Yun ,  Allen L. Limberg

IPC分类号： H04N9/80 ,  H04N9/82 ,  H04N9/835 ,  H04N9/79

CPC分类号： H04N9/835 ,  H04N9/80 ,  H04N9/8205

摘要： A frequency-multiplexed video signal is generated in which a color-under signal and a second under signal are linearly combined with at least partially overlapping frequency spectra to form a composite under signal for an FM luma signal. The frequency-multiplexed video signal is suited for recording on magnetic tape using helical scanning methods and for being played back from the magnetic tape using helical scanning methods. The second under signal is generated in such way that line-comb filtering can be used during playback to separate color-under signal and second under signal each from the composite signal despite their frequency spectra being at least partially overlapping in the composite signal.

摘要翻译： 产生频率复用的视频信号，其中彩色信号和第二下信号与至少部分重叠的频谱线性组合以形成用于FM亮度信号的复合信号。 频率复用视频信号适用于使用螺旋扫描方法在磁带上进行记录，并且使用螺旋扫描方法从磁带重放。 第二下信号被生成为使得在重放期间可以使用线梳滤波来分离彩色信号和第二下信号，每个来自复合信号，尽管它们的频谱在复合信号中至少部分重叠。

公开(公告)号：US4420726A

公开(公告)日：1983-12-13

申请号：US271026

申请日：1981-06-04

申请人： Allen L. Limberg

发明人： Allen L. Limberg

IPC分类号： H03F3/50 ,  H03F3/16

CPC分类号： H03F3/505

摘要： First and second transistors of first and second types that can exhibit respective first and second potentials of first and second opposite polarities between their respective input and common electrodes when respective currents flow in conduction paths between their respective output and common electrodes. The transistors are connected in cascade with the input electrode of the first transistor connected to an input point, the common electrode of the first transistor connected to the input electrode of the second, and the conduction path of the second transistor coupled to a load. A circuit for operating the first transistor at the first potential to compensate, at least in part, for the second potential comprises a third transistor of the first type to which is applied a potential of the first polarity between its input and common electrodes to establish a current in its conduction path. A current directly related to the current in the conduction path of the third transistor is applied to the common electrode of the second transistor as substantially the entire current flow in its conduction path.

摘要翻译： 第一和第二类型的第一和第二晶体管，当各自的电流在它们各自的输出端和公共电极之间的导通路径中流动时，它们可以在它们各自的输入端和公共电极之间呈现相应的第一和第二相反极性的第一和第二电位的第一和第二电极。 晶体管与连接到输入点的第一晶体管的输入电极级联连接，第一晶体管的公共电极连接到第二晶体管的输入电极，第二晶体管的导通路连接到负载。 用于操作第一电位的第一晶体管至少部分地用于第二电位的电路包括第一类型的第三晶体管，其在其输入端和公共电极之间施加第一极性的电位，以建立第 电流在其传导路径。 与第三晶体管的导通路径中的电流直接相关的电流作为基本上在其导通路径中的整个电流流动被施加到第二晶体管的公共电极。

公开(公告)号：US5835131A

公开(公告)日：1998-11-10

申请号：US839691

申请日：1997-04-15

申请人： Allen L. Limberg

发明人： Allen L. Limberg

IPC分类号： H04N5/21 ,  H04N5/44 ,  H04N5/38

CPC分类号： H04N5/4401 ,  H04N5/21

摘要： Co-channel interference accompanying multiple-level symbols in a digital receiver, such as a digital television receiver, is suppressed by using a first comb filter to reduce the energy of the co-channel interference before data slicing. The first comb filter incidentally precodes the symbol decoding results generated by the data slicing. A second comb filter postcodes the precoded symbol decoding results from the data slicing to generate corrected symbol decoding results. The symbol precoding of the input symbol stream results from differential delay and first linear combination of the differentially delayed terms. The postcoding of the symbol stream recovered by data slicing results from second linear combination of the symbol stream with delayed result of the second linear combination, and is performed in accordance with a modular arithmetic. One of the first and second linear combinations is subtractive, and the other is additive. The results of the second linear combination are the corrected symbol decoding results.

摘要翻译： 在诸如数字电视接收机的数字接收机中伴随多电平符号的同频道干扰通过使用第一梳状滤波器来减少在数据切片之前的同信道干扰的能量被抑制。 第一梳状滤波器附带地预编码由数据切片产生的符号解码结果。 第二梳状滤波器对来自数据切片的预编码符号解码结果进行后缀编码以产生校正的符号解码结果。 输入符号流的符号预编码源自差分延迟和差分延迟项的第一线性组合。 通过数据分片恢复的符号流的后置编码是由具有第二线性组合的延迟结果的符号流的第二线性组合产生的，并且根据模数运算来执行。 第一和第二线性组合中的一个是减法的，另一个是加法的。 第二线性组合的结果是校正符号解码结果。

公开(公告)号：US5548617A

公开(公告)日：1996-08-20

申请号：US243480

申请日：1994-05-19

申请人： Chandrakant B. Patel ,  Allen L. Limberg

发明人： Chandrakant B. Patel ,  Allen L. Limberg

IPC分类号： H04L27/38 ,  H04N5/44 ,  H04N5/455 ,  H04N5/50 ,  H04N7/015 ,  H04L27/06 ,  H03K1/00

CPC分类号： H04N5/4401 ,  H04L27/3836 ,  H04N5/455 ,  H04N5/50

摘要： In a radio receiver for receiving vestigial sideband (VSB) signals including symbol codes descriptive of digital signals, HDTV signals being exemplary of such VSB signals, a tuner provides for selecting one of channels at different locations in a frequency band used for transmitting such VSB signals. The tuner also includes mixers for performing plural conversion of the selected channel to a final intermediate-frequency signal, which is digitized by an analog-to-digital converter. A phase tracker, operative on narrow-bandpass filtered portions of the digitized final intermediate frequency signal centering on its carrier frequency, suppresses an imaginary portion of the final intermediate-frequency signal, arising from multipath distortion or from phase incoherency in local oscillations used during frequency conversion. A digital controlled oscillator in the phase tracker supplies digital descriptions of the carrier wave for the final intermediate-frequency signal to a synchronous detector, which synchronous detector detects the real portion of the digitized final intermediate-frequency signal in accordance with those digital descriptions of the carrier wave pair of all-pass digital filters, which exhibit a constant .pi./2 difference in phase response for the digitized bandpass signals and are designed based on Jacobian elliptic functions as described by C. M. Rader, are used in the phase tracker for generating the real and imaginary portions of the digitized final intermediate-frequency signal.

摘要翻译： 在用于接收包括描述数字信号的符号代码的残留边带（VSB）信号的无线电接收机中，HDTV信号是这样的VSB信号的示例，调谐器提供用于在用于发送这样的VSB信号的频带中的不同位置处选择一个信道 。 调谐器还包括用于执行所选频道的多个转换到由模数转换器数字化的最终中频信号的混频器。 基于其载波频率的数字化最终中频信号的窄带通滤波部分的相位跟踪器抑制由多径失真引起的最终中频信号的虚部，或者在频率期间使用的局部振荡中的相位不相干性 转换。 相位跟踪器中的数字控制振荡器将最终中频信号的载波的数字描述提供给同步检波器，该同步检测器根据这些数字描述的数字化最终中频信号的实际部分 对于数字化带通信号，其相位响应表现出常数pi / 2的全波数字滤波器的载波对，并且基于由CM Rader描述的雅可比椭圆函数设计，用于相位跟踪器中以产生真实的 和数字化的最终中频信号的虚部。

公开(公告)号：US4602275A

公开(公告)日：1986-07-22

申请号：US590989

申请日：1984-03-19

申请人： Terrence R. Smith ,  Allen L. Limberg

发明人： Terrence R. Smith ,  Allen L. Limberg

IPC分类号： H04N5/44 ,  H04N5/907 ,  H04N9/78 ,  H04N11/20 ,  H04N9/64

CPC分类号： H04N7/012 ,  H04N5/907 ,  H04N9/78

摘要： A memory system for a television receiver is disclosed. The memory system contains an array of addressable memory cells, each row of which can contain one line of sampled video signals. The number of rows in the array is greater than the number of lines in a frame. Apparatus is included in the memory system for simultaneously writing more than one line of samples into the memory, for simultaneously reading more than one line of samples from the memory, or for both. Simultaneous access to multiple lines allows the reading and writing of multiple corresponding lines of samples from both the current and the prior frame. The row addresses that are used to store the lines of samples for a frame are not the same for each frame, rather the lines of each new frame are stored in rows with lesser addresses than the rows used for the prior frame. This introduces a backward scrolling of the stored image from frame to frame which avoids overwriting data to be used in time-domain or spatial-domain filtering done directly from memory.

摘要翻译： 公开了一种用于电视接收机的存储系统。 存储器系统包含可寻址存储器单元的阵列，其每行可以包含一行采样视频信号。 数组中的行数大于一个帧中的行数。 装置包括在存储器系统中，用于同时将多于一行的样品写入存储器，用于从存储器或两者同时读取多于一行样品。 同时访问多条线路允许从当前和先前帧读取和写入多个相应的样本行。 用于存储帧的样本行的行地址对于每个帧是不相同的，而是每个新帧的行存储在具有比用于先前帧的行的地址少的行中。 这引入了存储的图像从帧到帧的向后滚动，这避免了覆盖直接从存储器完成的时域或空域域过滤中使用的数据。

公开(公告)号：US5563664A

公开(公告)日：1996-10-08

申请号：US179618

申请日：1994-01-05

申请人： Jian Yang ,  Allen L. Limberg

发明人： Jian Yang ,  Allen L. Limberg

IPC分类号： H04N7/025 ,  H04L5/12 ,  H04L25/497 ,  H04L27/18 ,  H04L27/22 ,  H04N5/21 ,  H04N5/44 ,  H04N7/03 ,  H04N7/035 ,  H04N7/08 ,  H04N7/081 ,  H04N11/24

CPC分类号： H04N5/4446 ,  H04L25/497 ,  H04L27/22 ,  H04L5/12 ,  H04N11/008 ,  H04N5/44 ,  H04N5/4401 ,  H04N7/0803 ,  H04N5/211

摘要： BPSK modulation of suppressed carrier in quadrature with a video carrier amplitude-modulated by composite video signal is used for transmitting a serial-bit digital signal, which is subjected both to "pre-line-comb" and "pre-frame-comb" partial-response filtering prior to conversion to BPSK modulating signal. The "pre-frame-comb" partial-response filtering of the serial-bit data is done on a continuous basis, rather than transmitting frames of the BPSK twice, once in positive logic and once in negative logic, during successive pairs of consecutive frames of the NTSC television signal. This results in the full luminance bandwidth below chroma frequencies being available on average for the transmission of BPSK, rather than half that bandwidth.

摘要翻译： 使用由复合视频信号幅度调制的视频载波正交的抑制载波的BPSK调制用于发送串行比特数字信号，该串行比特数字信号同时受到“前线梳”和“前帧梳”部分 - 转换到BPSK调制信号之前的响应滤波。 串行位数据的“前帧梳”部分响应滤波是连续进行的，而不是在连续的连续帧对中在正逻辑中一次传输BPSK两次，一次在负逻辑中传送帧 的NTSC电视信号。 这导致低于色度频率的全部亮度带宽平均可用于BPSK的传输，而不是带宽的一半。

公开(公告)号：US5506636A

公开(公告)日：1996-04-09

申请号：US266751

申请日：1994-06-28

申请人： Chandrakant B. Patel ,  Allen L. Limberg

发明人： Chandrakant B. Patel ,  Allen L. Limberg

IPC分类号： H04L27/00 ,  H04N5/44 ,  H04N5/455 ,  H04N5/46 ,  H04N7/015

CPC分类号： H04N5/4401 ,  H04N5/455 ,  H04N5/46 ,  H04L27/34

摘要： A radio receiver for receiving a selected digital HDTV signal, irrespective of whether it is a complex-amplitude-modulation (QAM) or a vestigial sideband (VSB) signal, using the same tuner. The final IF signal from the tuner is digitized for application to in-phase and quadrature QAM synchronous detectors and to in-phase and quadrature VSB synchronous detectors. The carrier frequencies of the QAM and VSB final IF signals are regulated to be submultiples of symbol frequency by applying automatic frequency and phase control signals developed in the digital circuitry to a local oscillator of the tuner. The mean average energy in the output samples of the quadrature VSB synchronous detector is sensed for automatically switching the radio receiver reception mode, for operation in a VSB HDTV signal reception mode when the mean average energy is below a threshold level, and for operation in a QAM signal reception mode when the mean average energy is not below the threshold level.

摘要翻译： 一种用于使用相同的调谐器接收所选数字HDTV信号的无线电接收机，而不管其是复调幅度调制（QAM）还是残留边带（VSB）信号。 来自调谐器的最终IF信号被数字化以应用于同相和正交QAM同步检波器以及同相和正交VSB同步检波器。 通过将数字电路中开发的自动频率和相位控制信号应用于调谐器的本地振荡器，QAM和VSB最终IF信号的载波频率被调节为符号频率的分数。 感测正交VSB同步检测器的输出样本中的平均能量，以便在平均能量低于阈值水平时自动切换无线电接收器接收模式，以便在VSB HDTV信号接收模式下操作，并且在 当平均能量不低于阈值水平时，QAM信号接收模式。

公开(公告)号：US5448299A

公开(公告)日：1995-09-05

申请号：US179588

申请日：1994-01-05

申请人： Jian Yang ,  Allen L. Limberg

发明人： Jian Yang ,  Allen L. Limberg

IPC分类号： H04L27/18 ,  H04N5/21 ,  H04N5/44 ,  H04N7/08 ,  H04N7/081 ,  H04N7/04

CPC分类号： H04N5/211 ,  H04N5/4401 ,  H04N7/08

摘要： A vestigial-sideband amplitude-modulation transmitter using a balanced modulator for generating a suppressed carrier that is in quadrature phasing with the video carrier of a television signal receives as modulating signal a binary phase-shift-keying (BPSK) signal encoding digital signals. The quadrature transmission reduces the visibility of the lower-frequency PSK sidebands in the TV signal as viewed on screen. The symbol rate of the PSK is made to be a multiple of the horizontal line scan rate of video signal. To reduce the visibility of the higher-frequency PSK sidebands in the TV signal as viewed on screen, the BPSK is transmitted twice during respective frames of successive pairs of data frames, which data frames recur at the same rate as video frames. To reduce the interference of video with the BPSK, the BPSK is comb filtered at the digital signal receiver and after symbol detection is subjected to partial-response filtering for recovering the digital signal originally encoded in the BPSK signal.

摘要翻译： 使用平衡调制器生成与电视信号的视频载波正交定相的抑制载波的残留边带幅度调制发射机接收编码数字信号的二进制相移键控（BPSK）信号作为调制信号。 正交传输降低了屏幕上观看的TV信号中低频PSK边带的可视性。 将PSK的符号率设为视频信号的水平线扫描速率的倍数。 为了降低在屏幕上观看的TV信号中的较高频率PSK边带的可视性，在相继的数据帧对中发送两次BPSK，该数据帧以与视频帧相同的速率重现。 为了减少视频与BPSK的干扰，BPSK在数字信号接收机处进行梳状滤波，并且对符号检测进行部分响应滤波，以恢复原始编码在BPSK信号中的数字信号。