EP0364986A2
Expired / Lapsed
EP
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Apparatus for reproducing video and audio signals
Assignee: Sony Corp
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Filing: 1989-10-18
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Granted: —
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Expires: 2009-10-18
Abstract
Abstract A pair of bimorph leaves (BM1, BM2) are mounted on a rotary drum (DR) and each bimorph leaf (BM1, BM2) includes four reproducing heads (P(A1),...P(D2)). A pair of recording head means, each of said means including two recording heads (R(A),...R(D)), are provided so that four record heads are used to form twelve tracks (A1,...) during three times of rotation of the rotary drum (DR) in one field period in a case of PAL television signal recording mode. The eight reproducing heads (P(A1),...P(D2)) are used to scan said twelve tracks so that the twelve tracks can be scanned within two times of rotation of the rotary drum (DR). In a case of recording and reproducing an NTSC television signal, the rotary drum (DR) rotates two times and a half during one field period of the NTSC signal so that the four record heads form ten tracks per field period. Eight reproducing heads are also used to scan the ten tracks in a same manner. Such arrangement of the record and reproducing heads makes a moving distance of the pair of bimorph leaves (BM1, BM2) reduced in a reproducing mode, the tape speed of which is different from that of the recording mode.
Inventors
- 👤 Hirohisa Koga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 09:35
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/783; G; G11; G11B; G11B15/00; G11B15/18; G11B15/1808; G11B15/1875; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/00865; G11B5/00869; G11B5/02; G11B5/09; G11B5/48; G11B5/52; G11B5/53; G11B5/531; G11B5/534; G11B5/58; G11B5/584; G11B5/588; G11B5/592; H04N5/7824; H04N5/7826
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
284 words
An apparatus for reproducing video and audio signals recorded digitally in successive parallel tracks (A1, B1...) on a record tape (T) while the latter is advanced at a predetermined speed in a direction (t) at an angle to the direction along said tracks (A1, B1,...), said apparatus comprising: (a) a rotary drum (DR); (b) first transducing means mounted on said rotary drum (DR) for recording the video and audio signals in a digital form on said record tape (T), said first transducing means including a pair of recording head means (R(A), R(B),...) which are mounted at an opposed position to each other on said rotary drum (DR) so that one field signal of the video and audio signals is formed by a plurality of parallel tracks; (c) a pair of bimorph leaves (BM1, BM2) each of which is mounted at an opposed position on said rotary drum (DR); and (d) second transducing means mounted on said pair of bimorph leaves (BM1, BM2) for scanning said parallel tracks (A1, B1,...), said second transducing means including pairs of reproducing heads (P(A1), P(B1);...) one pair of which being mounted on each of said bimorph leaves (BM1, BM2), so that said pairs of reproducing heads (P(A1), P(B1);...) can be deflected by said pair of bimorph leaves (BM1, BM2) in a direction transverse to the direction (h) along the tracks (A1, B1,...), when the tape (T) speed of the reproducing mode is different from the same of the recording mode, wherein the number of said pairs of reproducing heads (P(A1),P(B1);...) is larger than that of said pairs of recording head means (R(A),...) so that a total moving distance of said pair of bimorph leaves (BM1, BM2) can be reduced.
Claim 2
Independent Claim
284 words
An apparatus for reproducing video and audio signals recorded digitally in successive parallel tracks (A1, B1...) on a record tape (T) while the latter is advanced at a predetermined speed in a direction (t) at an angle to the direction along said tracks (A1, B1,...), said apparatus comprising: (a) a rotary drum (DR); (b) first transducing means mounted on said rotary drum (DR) for recording the video and audio signals in a digital form on said record tape (T), said first transducing means including a pair of recording head means (R(A), R(B),...) which are mounted at an opposed position to each other on said rotary drum (DR) so that one field signal of the video and audio signals is formed by a plurality of parallel tracks; (c) a pair of bimorph leaves (BM1, BM2) each of which is mounted at an opposed position on said rotary drum (DR); and (d) second transducing means mounted on said pair of bimorph leaves (BM1, BM2) for scanning said parallel tracks (A1, B1,...), said second transducing means including pairs of reproducing heads (P(A1), P(B1);...) one pair of which being mounted on each of said bimorph leaves (BM1, BM2), so that said pairs of reproducing heads (P(A1), P(B1);...) can be deflected by said pair of bimorph leaves (BM1, BM2) in a direction transverse to the direction (h) along the tracks (A1, B1,...), when the tape (T) speed of the reproducing mode is different from the same of the recording mode, wherein the number of said pairs of reproducing heads (P(A1),P(B1);...) is larger than that of said pairs of recording head means (R(A),...) so that a total moving distance of said pair of bimorph leaves (BM1, BM2) can be reduced.
Claim 3
Dependent Claim
24 words
The apparatus according to claim 1, in which each of said pair of recording head means includes two recording heads (R(A), R(B); R(C), R(D)).
Claim 4
Dependent Claim
23 words
The apparatus according to claim 1 or 2, in which each of said pairs of reproducing heads includes four reproducing heads (P(A1),...(P(D2); P(C1),...P(B2).
Claim 5
Dependent Claim
54 words
The apparatus according to claim 3, in which said rotary drum (DR) rotates three times during said one field period so that twelve parallel video and audio tracks (A1, B1,...) are formed on said record tape (T) by said four recording heads (R(A), R(B), R(C), R(D)) in a recording mode of PAL television signal.
Claim 6
Dependent Claim
29 words
The apparatus according to claim 4, in which said twelve tracks are scanned by said eight reproducing heads (P(A1), P(B1),...P(C2), P(D2)) within two rotations of said rotary drum (DR).
Claim 7
Dependent Claim
42 words
The apparatus according to claim 3, in which said rotary drum (DR) rotates two and a half times during one field period so that ten parallel tracks can be formed to record one field video and audio signals of NTSC television signal.
Claim 8
Dependent Claim
31 words
The apparatus according to claim 6, in which said eight reproducing heads (P(A1), P(B1),...P(C2), P(D2)) are used for reproducing said ten tracks within a time less than said one field period.
References Cited (Backward Citations)
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