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1.发明公开Signal processing apparatus and method for wide-screen television system 失效Vorrichtung und Verfahren zum Verarbeiten eines Sign infürein Grossbildfernsehsystem。
公开(公告)号：EP0655862A2
公开(公告)日：1995-05-31
申请号：EP94118408.7
申请日：1994-11-23
发明人： Hayashi, Kenichiro , Kageyama, Sadashi , Handa, Kouji , Uwabata, Hideyo , Kisoda, Akira , Hayashi, Takaya , Ogata, Yasuyo , Yasumoto, Yoshio
CPC分类号： H04N5/211 , H04N7/007 , H04N7/012 , H04N7/0122 , H04N11/006
摘要： The television signal processing apparatus receives a video signal including a main signal (y,c) and a helper signal (VT,VH,AH), and produces a signal for display based on the main signal and the helper signal, the main signal being arranged in a predetermined portion of the screen having a first aspect ratio and representing a picture having a second aspect ratio, and the helper signal being used for improving the quality of picture of the main signal. The television signal processing apparatus includes: a noise/ghost detection circuit for detecting the level of at least one of noise and ghost included in the video signal, and for producing at least one control signal (ki) based on the detected level; a first signal processing circuit for receiving the main signal and for producing a first reproduction signal by processing the main signal; a second signal processing circuit for receiving the main signal and the helper signal, and for producing a second reproduction signal by processing the main signal and the helper signal; a mixing circuit (113) for receiving the control signal and the first and second reproduction signals, and for adding the first and second reproduction signal with respective weights in accordance with the control signal; and a circuit for converting an output signal of the mixing circuit into the signal for display. If the video signal includes noise and/or ghost, the image quality is prevented from being degraded due to the addition of the helper signal.
摘要翻译： 电视信号处理设备接收包括主信号和辅助信号的视频信号，并且基于主信号和辅助信号产生用于显示的信号，主信号被布置在具有第一方面的屏幕的预定部分中 并且表示具有第二宽高比的图像，并且辅助信号用于提高主信号的图像质量。 电视信号处理装置包括：噪声/重影检测电路，用于检测视频信号中包括的噪声和重影中的至少一个的电平，并且用于基于检测到的电平产生至少一个控制信号; 第一信号处理电路，用于接收主信号并通过处理主信号产生第一再现信号; 第二信号处理电路，用于接收主信号和辅助信号，并通过处理主信号和辅助信号产生第二再现信号; 混合电路，用于接收控制信号和第一和第二再现信号，并且用于根据控制信号将具有相应权重的第一和第二再现信号相加; 以及用于将混合电路的输出信号转换成用于显示的信号的电路。 如果视频信号包括噪声和/或重影，则防止图像质量因辅助信号的增加而劣化。
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公开(公告)号：EP0567304A3
公开(公告)日：1994-05-25
申请号：EP93303072.8
申请日：1993-04-20
发明人： Hayashi, Kenichiro , Inoue, Syuji , Kageyama, Sadashi , Uwabata, Hideyo , Bowser, Todd Stephen , Yasumoto, Yoshio
IPC分类号： H04N7/00
CPC分类号： H04N7/007 , H04N5/16 , H04N5/18 , H04N11/167 , Y10S348/913
摘要： In the television broadcasting system called letter box method, it is proposed to transmit an image having a larger aspect ratio than that of the existing broadcasting system by using some of the scanning lines of the existing broadcasting system, and transmit some additional information signal in the remaining portion. An offset value applied to the additional information signal at the transmission side must be removed completely at the reception side. Accordingly, at the reception side, in the scanning line in which an offset reference signal indicative of the offset value is transmitted, the offset reference value and a DC level reference value of the scanning line are detected, and these values are retained until a next offset reference signal is detected. By detecting a DC level of a scanning line containing the additional information signal, a difference from the DC level reference value previously detected and retained is obtained, and the offset reference value detected and retained previously is corrected by this difference. Thus obtained offset value is subtracted from the transmitted additional information signal.
摘要翻译： 在称为信箱方法的电视广播系统中，提出了通过使用现有广播系统的一些扫描线来发送具有比现有广播系统更大的纵横比的图像，并且将一些附加信息信号 剩余部分。 应用于发送侧的附加信息信号的偏移值必须在接收侧完全移除。 因此，在接收侧，在发送表示偏移值的偏移参考信号的扫描线中，检测偏移参考值和扫描线的DC电平参考值，并且这些值被保持，直到下一个 偏移参考信号被检测。 通过检测包含附加信息信号的扫描线的DC电平，获得与先前检测并保持的DC电平参考值的差值，并且通过该差值预先检测并保持的偏移参考值被校正。 如此获得的偏移值从发送的附加信息信号中减去。
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3.发明公开Synchronisation of the local oscillator and of the sampling clock in a multicarrier receiver 失效本地振荡器的同步和多载波接收器的采样时钟
公开(公告)号：EP0798903A3
公开(公告)日：2000-05-17
申请号：EP97105215.4
申请日：1997-03-27
发明人： Kimura, Tomohiro , Harada, Yasuo , Kageyama, Sadashi , Kisoda, Akira , Hayashi, Kenichiro , Hayashino, Hiroshi
IPC分类号： H04L27/26
CPC分类号： H04L27/2657 , H04L27/2662 , H04L27/2678
摘要： This application concerns the synchronisation of a local oscillator and a sampling clock, in a receiver for multicarrier signals. Tracking is based on correlations between the guard interval and the corresponding portion of the multicarrier symbol.
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4.发明公开
公开(公告)号：EP0655862A3
公开(公告)日：1995-09-20
申请号：EP94118408.7
申请日：1994-11-23
发明人： Hayashi, Kenichiro , Kageyama, Sadashi , Handa, Kouji , Uwabata, Hideyo , Kisoda, Akira , Hayashi, Takaya , Ogata, Yasuyo , Yasumoto, Yoshio
CPC分类号： H04N5/211 , H04N7/007 , H04N7/012 , H04N7/0122 , H04N11/006
摘要： The television signal processing apparatus receives a video signal including a main signal (y,c) and a helper signal (VT,VH,AH), and produces a signal for display based on the main signal and the helper signal, the main signal being arranged in a predetermined portion of the screen having a first aspect ratio and representing a picture having a second aspect ratio, and the helper signal being used for improving the quality of picture of the main signal. The television signal processing apparatus includes: a noise/ghost detection circuit for detecting the level of at least one of noise and ghost included in the video signal, and for producing at least one control signal (ki) based on the detected level; a first signal processing circuit for receiving the main signal and for producing a first reproduction signal by processing the main signal; a second signal processing circuit for receiving the main signal and the helper signal, and for producing a second reproduction signal by processing the main signal and the helper signal; a mixing circuit (113) for receiving the control signal and the first and second reproduction signals, and for adding the first and second reproduction signal with respective weights in accordance with the control signal; and a circuit for converting an output signal of the mixing circuit into the signal for display. If the video signal includes noise and/or ghost, the image quality is prevented from being degraded due to the addition of the helper signal.
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公开(公告)号：EP0567304A2
公开(公告)日：1993-10-27
申请号：EP93303072.8
申请日：1993-04-20
发明人： Hayashi, Kenichiro , Inoue, Syuji , Kageyama, Sadashi , Uwabata, Hideyo , Bowser, Todd Stephen , Yasumoto, Yoshio
IPC分类号： H04N7/00
CPC分类号： H04N7/007 , H04N5/16 , H04N5/18 , H04N11/167 , Y10S348/913
摘要： In the television broadcasting system called letter box method, it is proposed to transmit an image having a larger aspect ratio than that of the existing broadcasting system by using some of the scanning lines of the existing broadcasting system, and transmit some additional information signal in the remaining portion. An offset value applied to the additional information signal at the transmission side must be removed completely at the reception side. Accordingly, at the reception side, in the scanning line in which an offset reference signal indicative of the offset value is transmitted, the offset reference value and a DC level reference value of the scanning line are detected, and these values are retained until a next offset reference signal is detected. By detecting a DC level of a scanning line containing the additional information signal, a difference from the DC level reference value previously detected and retained is obtained, and the offset reference value detected and retained previously is corrected by this difference. Thus obtained offset value is subtracted from the transmitted additional information signal.
摘要翻译： 在称为信箱方式的电视广播系统中，提出通过使用现有广播系统的一些扫描线来发送具有比现有广播系统更大的纵横比的图像，并且在其中发送一些附加信息信号 剩余部分。 在发送侧的附加信息信号的偏移值必须在接收侧被完全去除。 因此，在接收侧，在发送表示偏移值的偏移基准信号的扫描线中检测偏移基准值和扫描线的直流电平基准值，并将这些值保持到下一个 偏移参考信号被检测。 通过检测包含附加信息信号的扫描线的DC电平，获得与先前检测和保持的DC电平参考值的差，并且通过该差校正先前检测和保留的偏移参考值。 从所发送的附加信息信号中减去所获得的偏移值。
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6.发明授权Synchronisation of the local oscillator and of the sampling clock in a multicarrier receiver 失效本地振荡器的同步和多载波接收器的采样时钟
公开(公告)号：EP0798903B1
公开(公告)日：2007-12-05
申请号：EP97105215.4
申请日：1997-03-27
发明人： Kimura, Tomohiro , Harada, Yasuo , Kageyama, Sadashi , Kisoda, Akira , Hayashi, Kenichiro , Hayashino, Hiroshi
IPC分类号： H04L27/26
CPC分类号： H04L27/2657 , H04L27/2662 , H04L27/2678
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7.发明公开Synchronisation of the local oscillator and of the sampling clock in a multicarrier receiver 失效在einemMehrträgerempfänger的同义词Oszillators und des Abtasttaktes
公开(公告)号：EP0798903A2
公开(公告)日：1997-10-01
申请号：EP97105215.4
申请日：1997-03-27
发明人： Kimura, Tomohiro , Harada, Yasuo , Kageyama, Sadashi , Kisoda, Akira , Hayashi, Kenichiro , Hayashino, Hiroshi
IPC分类号： H04L27/26
CPC分类号： H04L27/2657 , H04L27/2662 , H04L27/2678
摘要： A quadrature detection circuit (31) quadrature detects an OFDM signal with a local carrier-wave signal to obtain a sampled OFDM signal for each sampling clock. A delay circuit (33) delays the sampled OFDM signal by the number of clocks corresponding to an effective symbol period in response to the sampling clock. Then, filter circuits (34 and 35) extract signal component from sampled OFDM signal delayed by delay circuit (33) in different frequency regions. Correlation circuits (36 and 37) obtain correlation vector between each of filter outputs and the sampled OFDM signal. A frequency control circuit (38) obtains frequency error of the local carrier-wave signal and that of the sampling clock in accordance with the sum and difference in the phase angle of each correlation vectors. In accordance with the error, the frequency of the local carrier-wave signal and that of the sampling clock are controlled. As a result, the frequencies of the local carrier-wave signal for quadrature detection and the sampling clock can be synchronized with the OFDM signal at high speed and without any influence of noise.
摘要翻译： 正交检测电路（31）正交检测用本地载波信号的OFDM信号，以获得每个采样时钟的采样OFDM信号。 延迟电路（33）响应采样时钟将采样的OFDM信号延迟与有效符号周期对应的时钟数。 然后，滤波电路（34,35）从不同频率区域延迟电路（33）延迟的采样OFDM信号中提取信号分量。 相关电路（36和37）获得滤波器输出和采样的OFDM信号之间的相关矢量。 频率控制电路（38）根据每个相关矢量的相位角的和和得到本地载波信号和采样时钟的频率误差。 根据误差，控制本地载波信号和采样时钟的频率。 结果，用于正交检测的本地载波信号和采样时钟的频率可以与OFDM信号以高速同步并且不受噪声的任何影响。
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8.发明公开Multicarrier reception with channel estimation and equalisation 审中-公开MehrträgerempfangmitKanalschätzungund Entzerrung
公开(公告)号：EP1521413A2
公开(公告)日：2005-04-06
申请号：EP04023312.4
申请日：2004-09-30
发明人： Hayashi, Kenichiro
CPC分类号： H04L25/0234 , H04L25/0216 , H04L25/0218 , H04L27/2647 , H04L2025/03414 , H04L2025/03522
摘要： A first Fourier transform circuit converts an OFDM signal to the frequency domain. A first divider divides the pilot signal contained in the frequency domain OFDM signal by a specified pilot signal. A zero insertion means then inserts zero signals in the first divider output. A window function multiplying means multiplies the zero insertion means output by a window function, and an inverse Fourier transform is applied to the multiplier output. A coring means then cores the inverse Fourier transform output, and truncation means truncates the result to a specified length. A second Fourier transform is applied to the truncated result. A window function dividing means then divides the second Fourier transform result by the window function, and a second dividing means divides the output of the first Fourier transform means by the output of the window function dividing means.
摘要翻译： 第一傅立叶变换电路将OFDM信号转换为频域。 第一分频器将包含在频域OFDM信号中的导频信号除以指定的导频信号。 零插入装置然后在第一分频器输出端插入零信号。 窗口函数乘法装置将通过窗口函数输出的零插入装置相乘，并且向乘法器输出施加逆傅立叶变换。 取芯装置核心逆傅立叶变换输出，截断意味着将结果截断到指定的长度。 对截断结果应用第二傅立叶变换。 窗函数分割装置然后将第二傅立叶变换结果除以窗函数，第二分割装置将第一傅里叶变换装置的输出除以窗函数分割装置的输出。
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公开(公告)号：EP0617551A1
公开(公告)日：1994-09-28
申请号：EP94302030.5
申请日：1994-03-22
发明人： Uwabata, Hideyo , Kageyama, Sadashi , Hayashi, Takaya , Ogata, Yasuyo , Kisoda, Akira , Hayashi, Kenichiro , Handa, Koji , Yasumoto, Yoshio
CPC分类号： H04N7/015 , H04N5/211 , H04N5/4401
摘要： A transmitter transmits a composite video signal and a multiplex signal on video carrier in a quadrature modulation method. A receiver synchronously detects an incoming signal with two orthogonal axes and separates the composite video signal from the multiplex signal to separately demodulate them. A crosstalk eliminator circuit to which the separately demodulated composite video signal and multiplex signal are supplied is connected in series with the ghost eliminator to eliminate ghost of the multiplex signal after eliminating crosstalk from the composite video signal to the multiplex signal. A waveform-equalized signal is obtained by adding a signal of only an inverse characteristic of crosstalk from the multiplex signal to the composite video signal with a decoded video signal. A non-linear extractor extracts non-linear crosstalk from the composite video signal, thereby obtaining a waveform-equalized multiplex signal by subtracting the non-linear crosstalk from the composite video signal to the multiplex signal from it.
摘要翻译： 发射机以正交调制方式在视频载波上发送复合视频信号和复用信号。 接收机以两个正交轴同步检测输入信号，并将复合视频信号与多路复用信号分离开来，以单独解调它们。 单独解调的复合视频信号和多路复用信号所提供的串扰消除器电路与重影消除器串联连接，以消除从复合视频信号到复用信号的串扰后的多路复用信号的重影。 通过将具有来自多路复用信号的串扰的逆特性的信号与解码的视频信号相加，从而获得波形均衡信号。 非线性提取器从复合视频信号中提取非线性串扰，从而通过从复合视频信号减去非线性串扰到多路复用信号来获得波形均衡的多路复用信号。
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公开(公告)号：EP0577351A3
公开(公告)日：1994-09-28
申请号：EP93304996.7
申请日：1993-06-25
IPC分类号： H04N7/08
CPC分类号： H04N7/08
摘要： A television signal processing system for multiplexing and transmitting additional information to the existing television broadcasting within the same transmission band as in the existing television broadcasting, assigns plural data to the amplitude or phase information in the frequency domain at the transmission side, and adjusts the amplitude of the frequency domain, then converts it into a signal in the time domain by inverse fast Fourier transform. The transformed signal is modulated by quadrature modulation of the video carrier, and limited in band by inverse Nyquist filter, and transmitted. At the reception side, the signal demodulated in quadrature by the video carrier is converted into information in the frequency domain, and the transmitted data is reproduced from that information.
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