| 摘要 |
PURPOSE:To simplify circuit constitution by allowing an averaging circuit for reproduction to function as a recording comb-shaped filter. CONSTITUTION:A switching circuit 30 is placed on the side of a recording side changeover terminal R at the time of recording. Then, a video signal to be recorded which is inputted to the device is applied to an adding circuit 21 and a one-horizontal-period delay circuit 20 constituting a separating and averaging circuit 31 and a subtracting circuit 5 through the switching circuit 30. Then, a luminance signal is extracted from the adding circuit 21 and a chroma signal is extracted by a subtracting circuit 5. Further, in case reproduction is performed, the switching circuit 30 is placed on a playback side. In this state, a video signal read out by a magnetic head 12 has its luminance signal demodulated by a luminance demodulating circuit 18 and the luminance signal from the luminance demodulating circuit 18 is inputted to the separating and averaging circuit 31 for brightness signal extraction through switching circuits 29 and 30. The separating and averaging circuit 31 functions as a comb- shaped filter for Y separation during recording and operates as the averaging circuit during reproduction.
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