| 摘要 |
<p>PURPOSE:To reduce a required signal transmission band width by forming a sum signal and a difference signal based on a television picture signal, and transmitting the signals while applying time division multiplexing and time axis comprssion to them. CONSTITUTION:the sum signal is formed by adding picture signals at two adjacent scanning periods of a television picture signal by an adder 11 mutually. Similarly, the dfference signal is formed by subtracting mutually the picture signals by a subtractor 12. The sum signal and the difference signal are arrange in time series at a unit time comprising two scanning periods and transmitted successively. The frequency ban width of the difference signal is narrowered less than the frequency band width of the sum signal and also the difference signal is transmitted while compressing the time axis. In such a transmission, the required signal transmission band width is reduced.</p> |
