| 摘要 |
PURPOSE:To reduce the transmission cost by using an alternate output means at a sender side so as to output 1st and 2nd television video signals alternately for each signal of one scanning line and using an interpolation means at a receiver side so as to interpolate the thinned signal by one scanning line. CONSTITUTION:A control signal generating section 2-2 controls a switch 2-1 to output alternately 1st and 2nd television video signals by one scanning line and inputs them to an A/D conversion section 6. The A/D conversion section 6 converts the video signal into a parallel 8-bit digital signal, a multiplex section 7 converts it into a serial signal, a light intensity modulation section 8 modulates it and the result is outputted to an optical fiber. A signal from the optical fiber at the receiver side is demodulated by a demodulation section 9, inputted to an S/P conversion section 10, becomes an 8-bit parallel signal and is inputted to a D/A conversion section 11. Then the signal is interpolated by a signal processing section 23 of signal interpolation sections 15, 16. Thus, two television video signals are sent in the band width of one television video signal. |
