Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
208 words
A magnetic recording apparatus comprising: first modulator means (2) for generating a frequency-modulated audio signal; a first rotary head (6a, 6b) for recording said audio signal from said first modulation means at a lower layer portion of a magnetic layer of a magnetic tape; second modulator means (14) for generating a digital signal having undergone poly-phase differential phase shift keying modulation; amplitude change elimination means (15) for eliminating changes in the amplitude of said digital signal from said second modulator means; a second rotary head (17a, 17b) having an azimuth angle different from that of said first rotary head for recording said digital signal from said amplitude change elimination means at an intermediate layer portion of the magnetic layer of said magnetic tape; video signal recording processing means (8) for processing a video signal; and a third rotary head (10a, 10b) having an azimuth angle different from those of said first rotary head and said second rotary head, for recording said video signal from said image signal recording processing means at an upper layer portion of the magnetic layer of said magnetic tape, thus to record said frequency-modulated audio signal and said digital signal along with said video signal at the magnetic layer portions different from each other.
Claim 2
Dependent Claim
208 words
A magnetic recording apparatus comprising: first modulator means (2) for generating a frequency-modulated audio signal; a first rotary head (6a, 6b) for recording said audio signal from said first modulation means at a lower layer portion of a magnetic layer of a magnetic tape; second modulator means (14) for generating a digital signal having undergone poly-phase differential phase shift keying modulation; amplitude change elimination means (15) for eliminating changes in the amplitude of said digital signal from said second modulator means; a second rotary head (17a, 17b) having an azimuth angle different from that of said first rotary head for recording said digital signal from said amplitude change elimination means at an intermediate layer portion of the magnetic layer of said magnetic tape; video signal recording processing means (8) for processing a video signal; and a third rotary head (10a, 10b) having an azimuth angle different from those of said first rotary head and said second rotary head, for recording said video signal from said image signal recording processing means at an upper layer portion of the magnetic layer of said magnetic tape, thus to record said frequency-modulated audio signal and said digital signal along with said video signal at the magnetic layer portions different from each other.
Claim 3
Dependent Claim
30 words
A magnetic recording apparatus as set forth in claim 1, in which the second modulator means generates the digital signal having undergone the offset differential quadrature phase shift keying modulation.
Claim 4
Dependent Claim
162 words
A magnetic recording/reproducing apparatus being constructed to add, to said magnetic recording apparatus as described above, comprising: first reproduction means (6a, 6b, 24, 27) for reproducing a recorded signal of a magnetic tape recorded by said magnetic recording apparatus as set forth in claim 1 to reproduce a frequency-modulated audio signal, first demodulator means (28) for frequency-demodulating said reproduced frequency-modulated audio signal, second reproduction means (17a, 17b, 17, 18, 19) for reproducing said digital signal recorded on said magnetic tape, second demodulator means (20) for applying the poly-phase differential phase shift keying demodulation or the offset poly-phase differential PSK phase shift keying demodulation to said reproduced digital signal, third reproduction means (10a, 10b 30) for reproducing said video signal recorded on said magnetic tape, and video signal reproduction processing means (31) for processing said reproduced video signal, thereby to record, on said magnetic tape, said frequency-modulated audio signal and said digital signal along with said video signal, and to reproduce them therefrom.