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公开(公告)号：EP0516359B1
公开(公告)日：1996-09-04
申请号：EP92304691.6
申请日：1992-05-22
CPC分类号： H04N5/4401 , H04N7/007 , H04N7/0806 , H04N11/008
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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：EP0516359A3
公开(公告)日：1993-03-03
申请号：EP92304691.6
申请日：1992-05-22
CPC分类号： H04N5/4401 , H04N7/007 , H04N7/0806 , H04N11/008
摘要： Disclosed is a television signal processing apparatus in which a picture signal having a high resolution can be broadcast while maintaining compatibility with the conventional broadcast systems and ensuring developability of the conventional mode of broadcasting and according to which multiple broadcast programs can be simultaneously broadcast. For this purpose, the known letter box method is used to transmit the main panel part of a picture, and a novel method is used to transmit the remaining bar parts of the picture by a path of transmission through a bar signal processor unit (4) and a path of transmission through a quadrature modulator unit (7) provided for quadrature modulation of the video carrier. Further, various devices are provided for the purpose of future development. According to a first stage of the present invention using the above means, both the conventional mode of analog modulation and a new mode of modulation such as digital modulation are made in the same channel for broadcasting the same program, thereby providing a television receiver conforming to the new modulation mode and satisfying the new mode of picture display. According to a second aspect, the conventional analog modulation system is replaced by a new modulation system so as to transmit a high definition picture signal, so that the receiver can reproduce the picture having a very high degree of definition. Also, because the picture can be efficiently transmitted by the new mode of modulation, the high definition picture can be transmitted in the same frequency band, and the shift from the conventional system can be attained while maintaining compatibility. Further, multiple broadcast programs of conventional pictures can be efficiently transmitted.
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公开(公告)号：EP0484322A3
公开(公告)日：1992-05-13
申请号：EP92101044.3
申请日：1987-07-14
发明人： Kageyama, Sadashi , Abe, Yoshio , Yasumoto, Yoshio , Inoue, Shuji , Takai, Hitoshi , Matsumoto, Mitsujiro , Aono, Kouji , Uchimura, Kiyoshi , Iwasaki, Eiji
IPC分类号： H04N11/00
CPC分类号： H04N7/0122 , H04N5/211 , H04N7/08 , H04N7/085 , H04N7/087 , H04N11/006 , H04N11/008
摘要： Disclosed are multiplex signal processing apparatuses in a signal transmitting and receiving system. The apparatus at the transmitting side comprises: a first amplitude-modulator for modulating a first carrier by a main signal to obtain a vestigial side band, amplitude-modulated main signal; a second amplitude-modulator for modulating a second carrier which is same in frequency to and different in phase by 90 from the first carrier by a multiplex signal to obtain a double side band, amplitude-modulated multiplex signal; an inverse Nyquist filter for filtering this signal to obtain a vestigial side band, amplitude-modulated multiplex signal; and an adder for adding the vestigial side band, amplitude-modulated main and multiplex signals to obtain a multiplexed signal. The apparatus at the receiving side comprises: a Nyquist filter for filtering the multiplexed signal; a carrier regenerator for regenerating the first and second carriers from the multiplexed signal; a main signal detector for detecting the main signal from the multiplexed signal passed through the Nyquist filter by using the first carrier; a filter for removing quadrature distortion from the multiplexed signal; and a multiplex signal detector for detecting the multiplex signal from the multiplexed signal passed through the filter by using the second carrier. This invention, when applied to the television system, provides a large quantity of additional information while keeping compativility with the conventional television system.
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5.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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6.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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公开(公告)号：EP0510973A1
公开(公告)日：1992-10-28
申请号：EP92303661.0
申请日：1992-04-23
CPC分类号： H04N7/0122 , H04N5/18 , H04N7/007
摘要： A television signal processing apparatus is capable of generating a television signal which is compatible with a television signal of aspect ratio of 4:3 and possesses an aspect ratio greater than 4:3. At the transmission side, a video signal having a greater aspect ratio than 4:3 is converted into a first signal which settles within an image frame determined in a standard, and a second signal is disposed in other area than the image frame. An offset is applied to a pedestal in a horizontal blanking interval in an other area than the image frame, and a set-up is applied to the pedestal in an effective scanning period in the other area than the image frame. At the reception side, the offset and set-up of the pedestal in the multiplexed portion of the second signal are removed from a received signal, and a circuit for restoring the second signal is provided. When the generated television signal is received by an existing television receiver, the second signal is not annoying, and in a special-purpose receiver, a high resolution image of aspect ratio of 16:9 less in noise deterioration of the second signal can be received.
摘要翻译： 电视信号处理装置能够生成与宽高比为4：3的电视信号兼容并且具有大于4:3的纵横比的电视信号。 在发送侧，具有比4:3更大的纵横比的视频信号被转换为在标准中确定的图像帧内的第一信号，并且第二信号被布置在除了图像帧之外的其它区域中。 在与图像帧以外的其他区域中，在水平消隐间隔中对基座施加偏移，并且在与图像帧相对的另一区域中的有效扫描周期中对基座施加偏移。 在接收侧，从接收到的信号中除去第二信号的复用部分中的基座的偏移和设置，并且提供用于恢复第二信号的电路。 当生成的电视信号被现有的电视接收机接收时，第二信号并不令人讨厌，而在专用接收机中，可以接收到第二信号的噪声恶化中的宽高比为16:9的较高分辨率图像 。
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公开(公告)号：EP0395378A3
公开(公告)日：1991-04-24
申请号：EP90304445.1
申请日：1990-04-25
CPC分类号： H04N7/0122 , H04N9/78
摘要： A main signal motion detection signal and a multiplex motion detection signal are operated to obtain a compensated motion detection signal. This signal is a motion detection signal for a portion other than a portion of aspect ratio of 4:3. Thus provided is a television signal processor eliminating quality difference of images between at the portion of aspect ratio of 4:3 and at the other portion.
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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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