US4829387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary head type digital signal reproducing device for controlling tape speed according to a tracking error
Assignee: Pioneer Corp
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Filing: 1987-12-28
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Granted: 1989-05-09
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Expires: 2007-12-28
Abstract
Abstract A rotary head type digital signal reproducing device for reproducing digital signals recorded on a tilted track of a magnetic tape. The recording device includes rotary heads HA,HB which reproduce digital signals recorded on the magnetic tape; a memory 23, connected to the rotary heads, for storing the reproduced signals; a correcting circuit 24, connected to the memory, for correcting signal errors in the stored digital signals; a digital to analog converter 25, connected to the correcting circuit, for converting the digital signals to analog signals; a tracking circuit 27, connected to the memory, for generating a tracking error signal from the digital signals; and a reel motor 28, connected to the tracking circuit, for controlling a reel 16 of the magnetic tape in accordance with the tracking error signal.
Inventors
- 👤 Takahiro Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:06
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/1808; G11B15/1875; G11B15/46; G11B15/467; G11B15/4673; G11B15/4675; G11B15/4676
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
171 words
A reproducing device for reproducing digital signals recorded on a recording tape, the digital signals recorded on the recording tape being addressed, the device comprising: means, coupled to the recording tape, for reproducing addressed digital signals recorded on the recording tape; memory means, coupled to said reproducing means, for receiving the reproduced addressed digital signals from the reproducing means and for storing the reproduced addressed digital signals therein, said memory means storing the reproduced addressed digital signals at a rate depending on the speed of the recording tape; tracking means, coupled to said memory means, for generating a tracking error from the difference between the address of a first reproduced digital signal which is being written into said memory means and the address of a second reproduced digital signal which is being read out from said memory means; and means for controlling the speed of the recording tape according to the generated tracking error, thereby controlling the rate in which the reproduced addressed digital signals are supplied to said memory means.
Claim 2
Dependent Claim
171 words
A reproducing device for reproducing digital signals recorded on a recording tape, the digital signals recorded on the recording tape being addressed, the device comprising: means, coupled to the recording tape, for reproducing addressed digital signals recorded on the recording tape; memory means, coupled to said reproducing means, for receiving the reproduced addressed digital signals from the reproducing means and for storing the reproduced addressed digital signals therein, said memory means storing the reproduced addressed digital signals at a rate depending on the speed of the recording tape; tracking means, coupled to said memory means, for generating a tracking error from the difference between the address of a first reproduced digital signal which is being written into said memory means and the address of a second reproduced digital signal which is being read out from said memory means; and means for controlling the speed of the recording tape according to the generated tracking error, thereby controlling the rate in which the reproduced addressed digital signals are supplied to said memory means.
Claim 3
Dependent Claim
30 words
The reproducing device according to claim 1, wherein the reproducing device is a rotary head type digital signal reproducing device, and wherein said reproducing means is a first rotary head.
Claim 4
Dependent Claim
51 words
The reproducing device according to claim 1, further comprising: a correcting circuit, connected to said memory means, for correcting a signal error of a digital signal received from said memory means; and a digital to analog converter connected to said correcting circuit for converting the corrected digital signals into analog signals.
Claim 5
Dependent Claim
27 words
The reproducing device according to claim 1, wherein said controlling means comprises a reel associated with the recording tape, and a reel motor for controlling said reel.
Claim 6
Dependent Claim
23 words
The reproducing device according to claim 4, further comprising a rear coupled to said reel, and a take-up reel coupled to said gear.
Claim 7
Dependent Claim
24 words
The reproducing device according to claim 1, wherein the digital signals recorded on the recording tape are addressed according to frame and block addresses.
Claim 8
Dependent Claim
18 words
The reproducing device according to claim 2, further comprising a drum having said first rotary head positioned thereon.
Claim 9
Dependent Claim
37 words
The reproducing device according to claim 7, wherein said drum has a second rotary head positioned thereon, and wherein said first and second rotary heads are spaced from each other at an angular interval of 180 degrees.
Claim 10
Dependent Claim
16 words
The reproducing device according to claim 1 wherein said tracking means is a central processing unit.
Claim 11
Dependent Claim
22 words
The reproducing device according to claim 9, further comprising a driver coupled to said central processing unit for driving said reproducing means.
Claim 12
Dependent Claim
29 words
The reproducing device according to claim 8, further comprising a driver, connected to said tracking means for rotating said drum at substantially twice a recording speed of the tape.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |