| 摘要 |
PURPOSE:To record a picture and a data on one magnetic tape and to reproduce them as required, by recording the data in a video signal with mixture on the magnetic tape and picking up and recording through the separation of the video signal and data after reproduction. CONSTITUTION:A data inputted to a terminal Din is stored to a read memory 5a at each 2H period of a TV. This stored data is transcripted on the read memory 5a at the point of time of the beginning of the next 2H and read out as a serial signal Dn sequentially. Since the data Dn is alternately picked up at a switching circuit at each 1H together with the data inverted at an inverting circuit 6, the output is the waveform of (Dn + inverted Dn). This waveform is added to a luminance signal Yn at an addition circuit 8 at each 1H and becomes a (Yn+ or -Dn) signal. This signal is FM-modulated 9 and synthesized at a mixer 10 together with a chroma signal Cn converted into a low frequency and stored on a magnetic tape with a magnetic head 12 after amplification 11. This recording is separated into the video signal and the data after reproduction. |
