Simple high-band record modulation circuit in 8MM video tape recorder

A record modulation circuit in an 8 mm video tape recorder, the record modulation circuit comprising:

• a single pre-emphasis means for emphasizing a high frequency band of an input luminance signal to produce an emphasized luminance signal,
• a single clipping means for limiting the level of said input luminance signal emphasized by said pre-emphasis means to produce a limited luminance signal,
• a single frequency modulation (FM) means for generating an FM-converted luminance signal which is suitable for a normal recording mode, after receiving said limited luminance signal output from said clipping means, and supplying to a recording head the FM-converted luminance signal,
• a frequency converter for receiving a chrominance signal and producing a low-band-converted chrominance signal, and supplying to the recording head the low-band-converted chrominance signal,
• a first frequency deviation amount determiner for determining a frequency deviation amount suitable for a normal recording mode of said frequency modulation means, and
• a second frequency deviation amount determiner for determining a second frequency deviation amount suitable for a simple high-band recording mode of said frequency modulation means,
• wherein said single frequency modulation means modulates each limited luminance signal which is input in the normal recording mode and the simple high-band recording mode, within the limits of the frequency deviation amount determined by one of said first frequency deviation amount determiner and said second frequency amount determiner.