EP0087114A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Video tape recorder
Assignee: Panasonic Holdings Corp
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Filing: 1983-02-16
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Granted: —
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Expires: 2003-02-16
Abstract
Abstract A video tape recorder includes a cylinder provided to rotate about its axis. A magnetic tape moves along a portion of the cylinder surface such that the cylinder surface obliquely traverses the magnetic tape. At least one pair of magnetic heads are mounted on the cylinder surface for recording and reproducing video signal on the tape, and another pair of magnetic heads are mounted on the cylinder for recording and reproducing audio signal on the tape.
Inventors
- 👤 Shuzo Hitotsumachi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; G; G11; G11B; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B15/00; G11B15/02; G11B5/00878; G11B5/48; G11B5/52; G11B5/53; G11B5/531; G11B5/534; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N9/00; H04N9/79; H04N9/7921; H04N9/80; H04N9/802; H04N9/82; H04N9/83; H04N9/835; H04N9/8355
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
73 words
A video tape recorder comprising: a cylinder provided to rotate about its axis; means for moving an elongated recording medium along a portion of said cylinder surface such that said cylinder surface obliquely traverses said medium; first magnetic head means mounted on said cylinder surface for recording and reproducing video signal on said medium; and second magnetic head means mounted on said cylinder for recording and reproducing audio signal on said medium. '
Claim 2
Dependent Claim
73 words
A video tape recorder comprising: a cylinder provided to rotate about its axis; means for moving an elongated recording medium along a portion of said cylinder surface such that said cylinder surface obliquely traverses said medium; first magnetic head means mounted on said cylinder surface for recording and reproducing video signal on said medium; and second magnetic head means mounted on said cylinder for recording and reproducing audio signal on said medium. '
Claim 3
Dependent Claim
32 words
A video tape recorder as claimed in Claim 1, wherein said second magnetic head means comprises first and second audio heads provided at opposite ends of a first diameter of said cylinder.
Claim 4
Dependent Claim
39 words
A video tape recorder as claimed in Claim 2, wherein said first magnetic head means comprises first and second video heads provided at opposite ends of a second diameter of said cylinder, said first and second diameters containing 60°.
Claim 5
Dependent Claim
31 words
A video tape recorder as claimed in Claim 3, wherein each of said first and second video heads and first and second audio heads has a head gap of different azimuth.
Claim 6
Dependent Claim
50 words
A video tape recorder as claimed in Claim 3, wherein said first and second video heads are provided at a first level on the cylinder, and wherein said first and second audio heads are provided at a second level on the cylinder above a predetermined distance from said first level.
Claim 7
Dependent Claim
65 words
A video tape recorder as claimed in Claim 5, wherein said moving means moves said medium at a first speed for effecting the scan of said first and second audio heads alternately in adjacent audio tracks obliquely transverse said medium, and effecting the scan of said first and second video heads alternately in adjacent video tracks such that said video tracks overlap said audio tracks.
Claim 8
Dependent Claim
79 words
A video tape recorder as claimed in Claim 6, wherein said moving means moves said medium at a second speed, which is an integer number times as fast as said first speed, for effecting the scan of said first and second audio heads alternately in adjacent audio tracks obliquely transverse said medium, and effecting the scan of said first and second video heads alternately in adjacent video tracks such that said video track and said audio track occur alternately.
Claim 9
Dependent Claim
21 words
A video tape recorder as claimed in Claim 7, wherein said video track and audio track partly overlap with each other.
Claim 10
Dependent Claim
70 words
A video tape recorder as claimed in Claim 7, further comprising a frequency modulator for frequency modulating an audio signal and producing an audio signal on carrier, an attenuator for attenuating the audio signal on carrier to a predetermined level, a switching circuit for alternately time dividing said audio signal on carrier, and a transformer for applying said audio signal on carrier alternately to said first and second audio heads.
Claim 11
Dependent Claim
36 words
A video tape recorder as claimed in Claim 9, wherein said carrier has a frequency which falls in a low side-band of a frequency modulated luminance signal and adjacent to a low frequency conversion color singal.
Claim 12
Dependent Claim
33 words
A video tape recorder as claimed in Claim 9, further comprising a switching means coupled to said attenuator for changing the degree of attenuation relative to the change of speed of the medium.
Claim 13
Dependent Claim
92 words
A video tape recorder as claimed in Claim 2, wherein said first magnetic head means comprises first and second video heads provided at opposite ends of a second diameter of said cylinder, and third and fourth video heads provided at opposite ends of a third diameter of said cylinder such that said first and third video heads are located closely adjacent to each other and said second and fourth video heads are located closely adjacent to each other, said first and second diameter being in a right angle relation to each other.
Claim 14
Dependent Claim
46 words
A video tape recorder as claimed in Claim 12, wherein said first and fourth video heads have a head gap of the same azimuth, and said second and third video heads have a head gap of the same azimuth, but different from the first mentioned azimuth.
Claim 15
Dependent Claim
52 words
A video tape recorder as claimed in Claim 13, wherein said first, second, third and fourth video heads are provided at a first level on the cylinder, and wherein said first and second audio heads are provided at a second level on the cylinder above a predetermined distance from said first level.
Claim 16
Dependent Claim
65 words
A video tape recorder as claimed in Claim 14, wherein said moving means moves said medium at a first speed for effecting the scan of said first and second audio heads alternately in adjacent audio tracks obliquely transverse said medium, and effecting the scan of said first and second video heads alternately in adjacent video tracks such that said video tracks overlap said audio tracks.
Claim 17
Dependent Claim
79 words
A video tape recorder as claimed in Claim 15, wherein said moving means moves said medium at a second speed, which is an integer number times as fast as said first speed, for effecting the scan of said first and second audio heads alternately in adjacent audio tracks obliquely transverse said medium, and effecting the scan of said third and fourth video heads alternately in adjacent video tracks such that said video track and said audio track occur alternately.
Claim 18
Dependent Claim
21 words
A video tape recorder as claimed in Claim 16, wherein said video track and audio track partly overlap with each other.
Claim 19
Dependent Claim
69 words
A video tape recorder as claimed in Claim 17, further comprising a frequency modulator for frequency modulating an audio signal and producing an audio signal on carrier, an attenuator for attenuating the audio signal on carrier to a predetermined level, a switching-circuit for alternately time dividing said audio signal on carrier, and a transformer for applying said audio signal on carrier alternately to said first and second audio heads.
Claim 20
Dependent Claim
36 words
A video tape recorder as claimed in Claim 18, wherein said carrier has a frequency which falls in a low side-band of a frequency modulated luminance signal and adjacent to a low frequency conversion color singal.
Claim 21
Dependent Claim
33 words
A video tape recorder as claimed in Claim 18, further comprising a switching means coupled to said attenuator for changing the degree of attenuation relative to the change of speed of the medium.
References Cited (Backward Citations)
No citation records indexed.
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