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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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公开(公告)号：EP0577351A2
公开(公告)日：1994-01-05
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.
摘要翻译： 在与现有的电视广播相同的传输频带内将附加信息复用到现有的电视广播中的电视信号处理系统，在发送侧向频域的振幅或相位信息分配多个数据，并且调整振幅 的频域，然后通过快速傅里叶逆变换将其转换成时域中的信号。 经变换的信号由视频载波的正交调制进行调制，并通过反向奈奎斯特滤波器限制频带，并传输。 在接收侧，由视频载波正交解调的信号被转换成频域中的信息，并且从该信息中再现发送的数据。
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