H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/20, 350/36
H04N 7/08 (2006.01) H04N 7/00 (2006.01)
Patent
CA 1314620
ABSTRACT OF THE DISCLOSURE A multiplex television signal processing apparatus includes a signal separator to separate a multiplex signal into first and second parts; a time-multiplexer to time-multiplex a main television signal and the first part of the multiplex signal to obtain a time-multiplexed main signal; a first amplitude-modulator for modulating a first carrier by the multiplexed main signal to obtain a vestigial sideband, amplitude-modulated main signal; a second amplitude-demodulator for modulating a second carrier by a second multiplex signal; an inverse Nyquist filter for filtering this signal to obtain a vestigial sideband, amplitude-modulated multiplex signal; and an adder for adding the vestigial sideband, amplitude-modulated main and multiplex signals to obtain a multiplexed signal. The apparatus also includes. 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; a multiplex signal detector for detecting the first multiplex signal from the multiplexed signal passed through he filter by using the second carrier; a time-demultiplexer for time-demultiplexing the main signal into a main television signal and a second multiplex signal; and a signal composer for composing the first and second multiplex signal to obtain the original multiplex signal.--.
562168
Abe Yoshio
Inoue Shuji
Kageyama Sadashi
Uwabata Hideyo
Yasumoto Yoshio
Fetherstonhaugh & Co.
Matsushita Electric Industrial Co. Ltd.
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