US5262905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitor apparatus for rotary head
Assignee: Sony Corp
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Filing: 1990-12-07
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Granted: 1993-11-16
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Expires: 2010-12-07
Abstract
Abstract The scanning locus of a rotary head type recording and reproducing apparatus is evaluated by reproducing a tape having a number of oblique recording tracks. Respective track addresses are assigned to each track, and each track includes a number of block addresses. The track address and block address reproduced at a given time are supplied to an address map data storage device to generate in the address map data storage device a set of map information indicative of the scanning conditions of the rotary heads. This makes it possible to determine easily whether the reproducing conditions along the scanning locus with respect to the recording track are good or bad.
Inventors
- 👤 Ryuji Takagi
- 👤 Masato Tanaka
- 👤 Hisao Nishioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:44
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/19; G11B20/00; G11B20/10; G11B20/18; G11B20/1816; G11B20/182; G11B27/34; G11B27/36; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
176 words
Apparatus for evaluating a scanning locus of a rotary head with respect to tracks recorded obliquely on a tape, the apparatus comprising: rotary head type recording and reproducing means for recording tracks obliquely on a tape, the tracks being assigned respective track addresses and each track comprising a plurality of blocks assigned respective block addresses, and for reproducing the track and block address proper to each block; detecting means responsive to the recording and reproducing means for indicating as to each track and block address whether or not there has been correct reproduction by the reproducing means; address map data storage means responsive to the recording and reproducing means and the detecting means for storing the reproduced track and block addresses as respective first and second map position specifying data and for generating map information indicating the positions specified by the correctly reproduced track and block addresses and identifying any track and block addresses that have not been correctly reproduced; and evaluating means responsive to the address map data storage means for evaluating the scanning locus.
Claim 2
Dependent Claim
176 words
Apparatus for evaluating a scanning locus of a rotary head with respect to tracks recorded obliquely on a tape, the apparatus comprising: rotary head type recording and reproducing means for recording tracks obliquely on a tape, the tracks being assigned respective track addresses and each track comprising a plurality of blocks assigned respective block addresses, and for reproducing the track and block address proper to each block; detecting means responsive to the recording and reproducing means for indicating as to each track and block address whether or not there has been correct reproduction by the reproducing means; address map data storage means responsive to the recording and reproducing means and the detecting means for storing the reproduced track and block addresses as respective first and second map position specifying data and for generating map information indicating the positions specified by the correctly reproduced track and block addresses and identifying any track and block addresses that have not been correctly reproduced; and evaluating means responsive to the address map data storage means for evaluating the scanning locus.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1 wherein the evaluating means comprises a display screen for displaying a pattern corresponding to said scanning locus.
Claim 4
Dependent Claim
28 words
Apparatus according to claim 1 wherein the evaluating means comprises a display screen for displaying a pattern corresponding to track and block addresses that have been incorrectly reproduced.
Claim 5
Dependent Claim
36 words
Apparatus according to claim 1 wherein the evaluating means comprises a display screen for displaying a pattern corresponding to said scanning locus and a pattern corresponding to track and block addresses that have been incorrectly reproduced.
Claim 6
Dependent Claim
31 words
Apparatus according to claim 1 wherein the evaluating means comprises a display screen for displaying a pattern corresponding to a rate of occurrence of errors as to each of the blocks.
Claim 7
Dependent Claim
74 words
Apparatus according to claim 1 for evaluating a scanning locus of a rotary head with respect to tracks recorded obliquely on a tape wherein the evaluating means comprises a display screen for displaying a pattern in which block addresses are represented by one of the axis of abscissae and the axis of ordinates and values corresponding to track addresses are represented by the other of the axis of abscissae and the axis of ordinates.
Claim 8
Dependent Claim
19 words
Apparatus according to claim 1 wherein the track and block addresses are recorded at least partially as digital data.
Claim 9
Dependent Claim
19 words
Apparatus according to claim 1 wherein the track and block addresses are recorded at least partially as analog data.
Claim 10
Dependent Claim
17 words
Apparatus according to claim 1 wherein the track and block addresses are recorded throughout the recorded tracks.
Claim 11
Dependent Claim
20 words
Apparatus according to claim 1 wherein the track and block addresses are recorded at selected portions of the recorded tracks.
Claim 12
Dependent Claim
15 words
Apparatus according to claim 1 wherein the recording and reproducing means comprises rotary magnetic heads.
Claim 13
Dependent Claim
15 words
Apparatus according to claim 1 wherein the recording and reproducing means comprises rotary optical heads.
Claim 14
Dependent Claim
24 words
Apparatus according to claim 1 wherein the recording and reproducing means records and reproduces information data in addition to the track and block addresses.
References Cited (Backward Citations)
US4380068A
Cited
US5113397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |