Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
A video tape recording/reproducing apparatus having a first main rotary head (M1) and a second main rotary head (M2), azimuth angles of said main rotary heads being different from each other, wherein in the reproduction mode a magnetic tape may be driven at a speed different from the speed in the recording mode, characterised in that said apparatus is further provided with a first sub-rotary head (S1) which is fixed near said first main rotary head (Ml) and provides a signal for compensating for lower signal levels of the signal provided by said first main rotary head (M1), and a second sub-rotary head (S2) which is fixed near said second main rotary head (M2) and provides a signal for compensating for lower signal levels of the signal provided by said second main rotary head (M2), the lower signal levels arising from the reproduction speed being different from the recording speed.
Claim 2
Dependent Claim
150 words
A video tape recording/reproducing apparatus having a first main rotary head (M1) and a second main rotary head (M2), azimuth angles of said main rotary heads being different from each other, wherein in the reproduction mode a magnetic tape may be driven at a speed different from the speed in the recording mode, characterised in that said apparatus is further provided with a first sub-rotary head (S1) which is fixed near said first main rotary head (Ml) and provides a signal for compensating for lower signal levels of the signal provided by said first main rotary head (M1), and a second sub-rotary head (S2) which is fixed near said second main rotary head (M2) and provides a signal for compensating for lower signal levels of the signal provided by said second main rotary head (M2), the lower signal levels arising from the reproduction speed being different from the recording speed.
Claim 3
Dependent Claim
53 words
A video tape recording/reproducing apparatus according to claim 1, characterised in that the azimuth angle of said first sub-rotary head (S1) is equal to that of said second main rotary head, (M2), and the azimuth angle of said second sub-rotary head (S2) is equal to that of said first main rotary head (M1).
Claim 4
Dependent Claim
26 words
A video tape recording/reproducing apparatus according to claim 2, characterised in that the main rotary heads and the sub-rotary heads have a common plane of rotation.
Claim 5
Dependent Claim
35 words
A video tape recording/reproducing apparatus according to claim 2, characterised in that the planes of rotation of the main rotary heads and the sub-rotary heads are spaced apart by an even number of track pitches.
Claim 6
Dependent Claim
82 words
5 . A video tape recording/reproducing apparatus according to claim 1, characterised in that the azimuth angle of said first sub-rotary head. (Sl) is equal to that of said first main rotary head (Ml), the azimuth angle of said second sub-rotary head (S2) is equal to that of said second main rotary head (M2), and the plane of rotation of said sub-rotary heads is spaced by an odd number of track pitches from the plane of rotation of said main rotary heads.
Claim 7
Dependent Claim
38 words
A video tape recording/reproducing apparatus according to any one of claims 1 to 5, characterised in that the track width of each of said sub-rotary heads is wider than that of each of said main rotary - heads.
Claim 8
Dependent Claim
49 words
A video tape recording/reproducing apparatus according to any one of claims 1 to 6, characterised in that the time lag of said signal provided by each of said sub-rotary heads with respect to said signal provided by each of said main rotary heads is compensated by a delay line.
Claim 9
Dependent Claim
43 words
A video tape recording/reproducing apparatus according to any one of claims I to 7, characterised in that said signal provided by each of said sub-rotary heads compensates said signal provided by the respective main rotary head in synchronization with reproduced horizontal sync signals.
Claim 10
Dependent Claim
67 words
A video tape recording/reproducing apparatus according to any one of claims 1 to 8, characterised in that there is provided an amplitude detector (53, 58, 73, 78) associated with each of the rotary heads (M1, S1, M2, S2) and means (55, 75) for detecting which signal provided by associated main and sub-rotary heads has the greater amplitude so as to use that signal as the reproduction signal.