| 摘要 |
In a playback circuit for a three-line sequential color television signal, which includes a memory presenting four outputs providing, respectively, the undelayed sequential signal and the sequential signal delayed by one, two and three horizontal picture line scanning periods, a combining arrangement connected to the four outputs to combine the signals thereat into a difference signal, and a further combining arrangement for adding the difference signal to the original three-line sequential signal, the circuit is simplified by constructing the memory to cause the signals at its four outputs to have identical amplitudes and by combining the signals at the four outputs of the memory by means of four electrically identical combining components, the undelayed sequential signal and the signal delayed by three picture lines having their polarities reversed relative to the signals delayed by one and two picture lines.
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