US5233437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording/reproduction apparatus for high-definition video signal
Assignee: Sony Corp
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Filing: 1989-12-13
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Granted: 1993-08-03
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Expires: 2009-12-13
Abstract
Abstract A recording/reproduction system performs high precision drop-out processing and compensation in the reproduction mode from a disk-shaped recording medium by using a recording format in which a video signal is divided alternately in units of one horizontal scan line into two channels, and the timing of the recorded video signal on one channel is displaced relative to that of the other channel, so as to record the divided signals on a pair of parallel spiral tracks forming the two channels on the disk. A mean value interpolation circuit is provided in each channel for drop-out compensation, and a portion of a reproduced signal of one channel is compensated by a compensation signal produced by the interpolation circuit of the other channel.
Inventors
- 👤 Kaoru Tachibana
- 👤 Ken Morita
- 👤 Hiroo Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:28
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/81; H04N9/797; H04N9/7973; H04N9/82; H04N9/8205; H04N9/8211; H04N9/87; H04N9/88
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
199 words
A drop-out compensating circuit for video signals reproduced simultaneously from first and second tracks of a recording medium, wherein a first track includes a first video signal having every other video line of an original video signal and a second track includes a second video signal having the remaining video lines of the original video signal that are positionally dislocated by an integer multiple of a time interval of one recording video line relative to the first video signals, the circuit comprising: a first compensation signal generating circuit receiving a reproduced said first video signal, a second compensation signal generating circuit receiving a reproduced said second video signal and including skew correcting means for relocating the positionally dislocated lines of the original video signal, first switching means coupled to said first video signal and said second compensation signal generating circuit for compensating a drop-out video signal present in said first video signal with an output of said second compensation generating circuit, and second switching means coupled to said second video signal and said first compensation signal generating circuit for compensating a drop-out video signal present in said second video signal with an output of said first compensation generating circuit.
Claim 2
Dependent Claim
199 words
A drop-out compensating circuit for video signals reproduced simultaneously from first and second tracks of a recording medium, wherein a first track includes a first video signal having every other video line of an original video signal and a second track includes a second video signal having the remaining video lines of the original video signal that are positionally dislocated by an integer multiple of a time interval of one recording video line relative to the first video signals, the circuit comprising: a first compensation signal generating circuit receiving a reproduced said first video signal, a second compensation signal generating circuit receiving a reproduced said second video signal and including skew correcting means for relocating the positionally dislocated lines of the original video signal, first switching means coupled to said first video signal and said second compensation signal generating circuit for compensating a drop-out video signal present in said first video signal with an output of said second compensation generating circuit, and second switching means coupled to said second video signal and said first compensation signal generating circuit for compensating a drop-out video signal present in said second video signal with an output of said first compensation generating circuit.
Claim 3
Dependent Claim
62 words
A drop-out compensating circuit according to claim 1, further comprising: drop-out detector means coupled to a first video signal reproduced from said first track for generating a first drop-out detection signal supplied to said first switching means and coupled to a second video signal reproduced from said second track for generating a second drop-out detection signal supplied to said second switching means.
Claim 4
Dependent Claim
54 words
A drop-out compensating circuit according to claim 2, wherein said first compensation signal generating circuit includes a first mixing circuit for mixing two successive video lines of said first video signal and said second compensation signal generating circuit includes a second mixing circuit for mixing two successive video lines of said second video signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-02 | 1997-02-01 | 1997-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-02 | 2001-02-01 | 2001-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-02 | 2005-02-01 | 2005-08-03 | $7700.00 | Window Closed / Lapsed |