公开(公告)号：US5408268A

公开(公告)日：1995-04-18

申请号：US156064

申请日：1993-11-22

申请人： John I. Shipp

发明人： John I. Shipp

IPC分类号： H04N5/225 ,  H04N5/235 ,  H04N7/18 ,  H04N9/04 ,  H04N11/08 ,  H04N11/24 ,  H04N13/00

CPC分类号： H04N13/021 ,  H04N13/0253 ,  H04N13/0257 ,  H04N5/2354 ,  H04N9/045 ,  H04N13/0059 ,  H04N13/0217 ,  H04N13/0239 ,  H04N13/0296 ,  H04N13/0438 ,  H04N13/0497

摘要： A sequential video imaging system uses a video sensor having full frame whereby image data is moved from sensor image elements to a video amplifier. The object being viewed is sequentially illuminated with colored light sources to produce RGB or luminance and chrominance video signals. A digital signal processor includes data buffering and summing circuits.

摘要翻译： 顺序视频成像系统使用具有全帧的视频传感器，由此图像数据从传感器图像元件移动到视频放大器。 用彩色光源依次照亮被观看的物体，产生RGB或亮度和色度视频信号。 数字信号处理器包括数据缓冲和求和电路。

公开(公告)号：US5315619A

公开(公告)日：1994-05-24

申请号：US883735

申请日：1992-05-15

申请人： Bhavesh B. Bhatt

发明人： Bhavesh B. Bhatt

IPC分类号： H03M13/25 ,  H04L27/38 ,  H04N5/44 ,  H04N9/44 ,  H04N9/66 ,  H04N11/00 ,  H04N11/24 ,  H04L5/12 ,  H04L23/02

CPC分类号： H03M13/25 ,  H04L27/3872 ,  H04N11/008 ,  H04N5/4401 ,  H04N9/44 ,  H04N9/66

摘要： A television receiver responds to a quadrature amplitude modulated (QAM) signal containing symbols mapped into a four quadrant grid-like constellation defined by I and Q axes. Demodulated I and Q components are processed by a carrier recovery network which adjusts the parameters of a locally generated carrier reference signal so as to maintain a desired orientation of the QAM constellation. The carrier recovery network includes a time multiplexed processor, including a signal multiplier, exhibiting plural operating modes in a digital phase locked loop exhibiting a loop delay of one symbol period.

摘要翻译： 电视接收机响应包含映射到由I和Q轴定义的四象限网格状星座的符号的正交幅度调制（QAM）信号。 解调的I和Q分量由载波恢复网络处理，载波恢复网络调整本地生成的载波参考信号的参数，以保持QAM星座的期望取向。 载波恢复网络包括时间复用处理器，包括信号乘法器，在呈现一个符号周期的环路延迟的数字锁相环中呈现多种操作模式。

公开(公告)号：US5282019A

公开(公告)日：1994-01-25

申请号：US875491

申请日：1992-04-29

申请人： Carlo Basile ,  Aldo G. Cugnini ,  Alan P. Cavallerano ,  Yo-Sung Ho ,  David A. Bryan ,  Faramarz Azadegan ,  Mikhail Tsinberg

发明人： Carlo Basile ,  Aldo G. Cugnini ,  Alan P. Cavallerano ,  Yo-Sung Ho ,  David A. Bryan ,  Faramarz Azadegan ,  Mikhail Tsinberg

IPC分类号： H04L27/26 ,  H04N5/21 ,  H04N5/44 ,  H04N5/60 ,  H04N7/06 ,  H04N7/08 ,  H04N11/24 ,  H04N11/12

CPC分类号： H04N5/4401 ,  H04L27/2601 ,  H04L27/2608 ,  H04N11/002 ,  H04N5/211 ,  H04N5/44 ,  H04N7/063 ,  H04N7/08 ,  H04N5/602

摘要： A method and apparatus for encoding a television source signal having a first bandwidth, into a frequency multiplexed signal having a narrower bandwidth and comprising a plurality of subcarriers modulated with digital information. Each of said subcarriers has an amplitude, bandwidth and coding characteristic which reflects the relative importance of the digital information provided thereby. The frequency multiplexed signal is suitable for use in a broadcasting environment wherein a conventional television signal is also used and wherein said subcarriers are disposed in frequency, in positions which are least likely to result in interference to or from said conventional signal. The invention also includes a receiver for decoding the frequency multiplexed signal and for providing a high definition display.

摘要翻译： 一种用于将具有第一带宽的电视信号源编码成具有较窄带宽并且包括用数字信息调制的多个子载波的频率复用信号的方法和装置。 所述子载波中的每一个具有反映由此提供的数字信息的相对重要性的幅度，带宽和编码特性。 频率复用信号适用于广播环境，其中也使用传统的电视信号，并且其中所述子载波被布置在频率上，在最不可能导致与所述常规信号的干扰的位置。 本发明还包括用于对频率复用信号进行解码并提供高清晰度显示的接收机。

公开(公告)号：US5258838A

公开(公告)日：1993-11-02

申请号：US802153

申请日：1991-12-04

申请人： Richard W. Citta

发明人： Richard W. Citta

IPC分类号： H04H20/67 ,  H04N5/44 ,  H04N7/08 ,  H04N11/24 ,  H04N5/21 ,  H04N7/00

CPC分类号： H04H20/67 ,  H04N11/006 ,  H04N5/4401 ,  H04N7/0803

摘要： A precoded N-level HDTV digital video signal characterized by a sampling rate fs substantially equal to 3/2 the NTSC color subcarrier frequency is modulated for transmission on a carrier signal having a frequency substantially mid-way between the picture carrier and color subcarrier of an NTSC co-channel. The received signal is detected by a synchronous detector in response to a regenerated carrier signal and interfering NTSC beat components in the output of the detector are attenuated by a comb filter having a notch at fs/3. The output of the comb filter comprises an M-level signal, where M is greater than N, which is converted to an N-level signal corresponding to the demodulated video signal.

摘要翻译： 调制NTSC彩色副载波频率基本上等于3/2的采样率fs的预编码的N级HDTV数字视频信号，用于在具有频率基本上介于图像载波和彩色副载波之间的频率的载波信号上进行传输 NTSC同频道。 所接收的信号由同步检测器响应于再生的载波信号而检测，并且检测器的输出中的干扰NTSC拍频分量由具有fs / 3的陷波的梳状滤波器衰减。 梳状滤波器的输出包括M级信号，其中M大于N，其被转换为对应于解调视频信号的N电平信号。

公开(公告)号：US5239379A

公开(公告)日：1993-08-24

申请号：US915552

申请日：1992-07-20

申请人： Yoshio Abe ,  Seiji Sakashita ,  Ippei Kanno ,  Hiroaki Ozeki

发明人： Yoshio Abe ,  Seiji Sakashita ,  Ippei Kanno ,  Hiroaki Ozeki

IPC分类号： H04B7/02 ,  H04N5/21 ,  H04N5/44 ,  H04N5/455 ,  H04N5/46 ,  H04N7/00 ,  H04N11/24

CPC分类号： H04N5/211 ,  H04N11/004 ,  H04N5/46

摘要： A television signal receiving apparatus receives a new standard television broadcasting signal in an environment in which conventional standard television broadcasting signals are present. A first tuner coupled to a first antenna extracts a first television signal which contains a new standard television signal and a conventional standard television signal of the specific channel at a first ratio, and a second tuner coupled to a second antenna extracts a second television signal which contains the new standard television signal and the conventional standard television signal of the specific channel at a second ratio. In an operation unit, a multiplier multiples the second television signal by a predetermined coefficient, and a subtracter subtracts an output signal of the multiplier from the first television signal. An output signal of the subtracter becomes the new standard television signal when the coefficient has a specific value.

公开(公告)号：US5221968A

公开(公告)日：1993-06-22

申请号：US720568

申请日：1991-06-25

申请人： Richard E. F. Bugg

发明人： Richard E. F. Bugg

IPC分类号： G06F3/153 ,  G09G5/22 ,  G09G5/30 ,  H04N7/025 ,  H04N7/03 ,  H04N7/035 ,  H04N7/088 ,  H04N9/00 ,  H04N11/00 ,  H04N11/24

CPC分类号： G09G5/30 ,  G09G5/222 ,  H04N7/0884

摘要： An ideographic teletext transmission system based on the World System Teletext specification in which ideograms are displayed in the space of two character positions in each of three display rows, the ideogram code being defined by the corresponding bytes in one, e.g. the first, of the transmission packets corresponding to the three display rows and the corresponding bytes in another of the transmission packets corresponding to the three display rows being used to define an attribute code thereby affording a non-spacing attribute facility.

公开(公告)号：US5200812A

公开(公告)日：1993-04-06

申请号：US476731

申请日：1990-02-08

申请人： Kunio Suesada ,  Toshiaki Koya ,  Kunio Sekimoto

发明人： Kunio Suesada ,  Toshiaki Koya ,  Kunio Sekimoto

IPC分类号： H04N5/92 ,  H04N7/46 ,  H04N9/79 ,  H04N9/804 ,  H04N9/808 ,  H04N11/04 ,  H04N11/24

CPC分类号： H04N9/8081 ,  H04N11/006 ,  H04N19/59 ,  H04N9/7904

摘要： A sampling frequency down-converting apparatus low-pass converts a digital picture signal sampled at a sampling frequency of 8 Fsc by a thinning out operation into the digital picture signal sampled at a frequency of 4 Fsc, and a sampling frequency up-converting apparatus high-pass converts the digital picture signal sampled at 4 Fsc into one sampled at 8 Fsc by interpolation. If the signal is wider in the required zone than the conventional NTSC signal and the PAL signal like the ATV signal, the transmission and the recording may be effected without the deterioration of the frequency characteristics.

公开(公告)号：US5200811A

公开(公告)日：1993-04-06

申请号：US685822

申请日：1991-04-16

申请人： Hyun-Deok Cho

发明人： Hyun-Deok Cho

IPC分类号： H04N11/08 ,  H04N5/455 ,  H04N5/60 ,  H04N7/015 ,  H04N7/087 ,  H04N7/12 ,  H04N7/46 ,  H04N11/24

CPC分类号： H04N11/006 ,  H04N19/186 ,  H04N19/587 ,  H04N19/59 ,  H04N5/455 ,  H04N7/015 ,  H04N7/087 ,  H04N5/44 ,  H04N5/60

摘要： A method for receiving a high definition television signal has been used by the band-splitting and sub-sampling method. The concrete embodiment for the method can be accomplished by converting the received radio frequency signal into a first intermediate frequency signal, and by splitting a second intermediate frequency signal and a narrow band intermediate frequency signal therefrom. The narrow band intermediate frequency signal is lacked a given fixed frequency to demodulate the second intermediate frequency signal in a quadrature phase-shift technique. The demodulated signal is low-pass filtered and converted into a digital signal to separate into a synchronizing, an audio signal, a control signal therefrom. The digital signal is processed at high frequency band according to the control signal, and delayed a given time. The delayed signal is added to the signal processed at high frequency band. The added signal is separated into a luminance and chrominance signals to convert into an analog signals.

摘要翻译： 用于接收高分辨率电视信号的方法已被频带分割和次采样方法所采用。 该方法的具体实施例可以通过将接收到的射频信号转换为第一中频信号，并通过从其分离第二中频信号和窄带中频信号来实现。 窄带中频信号缺少给定的固定频率以在正交相移技术中解调第二中频信号。 解调信号被低通滤波并转换为数字信号，以分离成同步音频信号，控制信号。 数字信号根据控制信号在高频段进行处理，延时给定时间。 将延迟信号加到在高频带处理的信号上。 所附加的信号被分成亮度和色度信号以转换为模拟信号。

公开(公告)号：US5161003A

公开(公告)日：1992-11-03

申请号：US667297

申请日：1991-03-11

申请人： Seijiro Yasuki ,  Kiyoyuki Kawai ,  Noboru Taga

发明人： Seijiro Yasuki ,  Kiyoyuki Kawai ,  Noboru Taga

IPC分类号： H04N7/015 ,  H04N7/08 ,  H04N7/081 ,  H04N11/24

CPC分类号： H04N11/008 ,  H04N7/012 ,  H04N7/015 ,  Y10S348/904

摘要： A compatible television signal encoder for encoding a television signal having a first signal and a second signal. The decoder includes a divider for dividing the wide aspect television signal into a main signal having the first signal and low-frequency components of the second signal multiplexed in the horizontal overscan regions of the first signal and an auxilary signal, an interpolator for producing an interpolating scanning field signal using a first scanning field signal of the main signal output from the divider, a field switch for replacing a second scanning field signal of the main signal with the interpolating scanning field signal output from the interpolator and an adder for adding the auxiliary signal from the divider to the signal output from the field switch.

公开(公告)号：US5155580A

公开(公告)日：1992-10-13

申请号：US638301

申请日：1991-01-07

申请人： James J. Gibson ,  Robert N. Hurst, Jr. ,  Jack S. Fuhrer ,  Terrence R. Smith

发明人： James J. Gibson ,  Robert N. Hurst, Jr. ,  Jack S. Fuhrer ,  Terrence R. Smith

IPC分类号： H04N11/24

CPC分类号： H04N11/008 ,  Y10S348/903

摘要： In a television signal processing system of the type which encodes an auxiliary carrier modulated with auxiliary image information in line format, which carrier is placed within the spectral band of standard television signal components, and wherein the modulated auxiliary carrier tends to interfere with the standard television signal, the interference is minimized by spatially variably attenuating the auxiliary image information. The attenuation function is selected to apply greater attenuation to the auxiliary image information at the extremities of the lines than toward the center of the lines.

摘要翻译： 在对以辅助图像信息进行调制的辅助载波进行编码的电视信号处理系统中，载波被放置在标准电视信号分量的谱带内，并且其中调制的辅助载波倾向于干扰标准电视 信号，通过空间可变地衰减辅助图像信息来最小化干扰。 衰减功能被选择为对线路的末端的辅助图像信息施加更大的衰减，而不是线路的中心。