| 摘要 |
PURPOSE:To increase signal components of an analog signal such as a low band conversion chroma signal or the like by recording the analog signal of both recording layers of a magnetic recording medium having a double structure and adding both signals at a reproducing time. CONSTITUTION:Luminance signal components are subjected to FM modulation by an FM modulator 7 and are supplied to a pulse width modulator 8. A chroma signal is converted to a low band by a low-band converter 10. This output has only a band signal extracted by an LPF 11. The output of the pulse width modulator 8 has a low-band side band eliminated by an HPF 12. The output of a mixer 13 is amplified and is recorded onto a magnetic tape 17 having a double structure. The reproduced signal has only FM wave signal components extracted by an HPF 19 to demodulate the luminance signal in a demodulator 20 through one route and has only the low band conversion chroma signal separated by an LPF 22 through the other. This output includes a low-band conversion chroma signal from a horizontal magnetized recording layer and chroma signal components from a vertical magnetized recording layer. This output is converted to a chroma signal by a high-band converter 23. Thus, two chroma signals are added to increase sufficiently signal components. |
