US4870633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reproducing information recorded on a recording medium
Assignee: Canon Inc
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Filing: 1988-10-05
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Granted: 1989-09-26
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Expires: 2008-10-05
Abstract
Abstract An information reproducing system is disclosed. This system is arranged such that information is read out from a recording medium having different types of first and second items of information and is output in the form of a signal. The waveform of the output signal is shaped and supplied as a reproduced signal. In the above-mentioned signal processing, this information reproducing system is adapted to control the shaping of the signal waveform in accordance with each type of information to be read out from the recording medium.
Inventors
- 👤 Machiko Matsushita
- 👤 Akio Aoki
- 👤 Kazuo Minoura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:34
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/002; G11B7/0033; G11B7/004; G11B7/0045
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
80 words
An information reproducing apparatus comprising: a recording medium having different types of first and second information recorded in a manner different from each other; reading means for reading out said information recorded on said recording medium and outputting a signal; shaping means for shaping the waveform of said signal output by said reading means; and switching means for switching shaping mode of said shaping means in accordance with each type of information to be read out by said reading means.
Claim 2
Dependent Claim
80 words
An information reproducing apparatus comprising: a recording medium having different types of first and second information recorded in a manner different from each other; reading means for reading out said information recorded on said recording medium and outputting a signal; shaping means for shaping the waveform of said signal output by said reading means; and switching means for switching shaping mode of said shaping means in accordance with each type of information to be read out by said reading means.
Claim 3
Dependent Claim
19 words
An information reproducing apparatus according to claim 1, wherein said recording medium is constituted by an optical recording medium.
Claim 4
Dependent Claim
31 words
An information reproducing apparatus according to claim 2, wherein said first information is recorded by lithography, and said second item of information is recorded by the irradiation of a light beam.
Claim 5
Dependent Claim
47 words
An information reproducing apparatus according to claim 3, wherein said recording medium has a plurality of recording tracks, said first information has a track number which is preformatted on said recording medium, and said second information has information recorded on said recording tracks by the light beam.
Claim 6
Dependent Claim
26 words
An information reproducing apparatus according to claim 2, wherein said reading means includes light beam generating means for irradiating a light beam to said recording medium.
Claim 7
Dependent Claim
25 words
An information reproducing apparatus according to claim 1, wherein said shaping means converts an analog signal outputted from said reading means into a digital signal.
Claim 8
Dependent Claim
47 words
An information reproducing apparatus according to claim 6, wherein said shaping means includes a plurality of analog-digital converting means and said switching means selects one of said plurality of analog-digital converting means in accordance with each type of information to be read out by said reading means.
Claim 9
Dependent Claim
40 words
An information reproducing apparatus according to claim 6, wherein said switching means varies a threshold value for converting an analog signal into a digital signal in accordance with each type of information to be read out by said reading means.
Claim 10
Dependent Claim
21 words
An information reproducing apparatus according to claim 1, wherein said first and second information is recorded on the same recording medium.
Claim 11
Dependent Claim
22 words
An information reproducing apparatus according to claim 1, said apparatus further comprising means for recording said second information on said recording medium.
Claim 12
Dependent Claim
23 words
An information reproducing apparatus according to claim 1, wherein said reading means is provided commonly to read out said first and second information.
Claim 13
Dependent Claim
83 words
An information reproducing apparatus comprising: a recording medium having different types of first and second information signals recorded in a manner different from each other; reading means for reading out said information signals recorded on said recording medium and outputting a signal; reproducing means for reproducing said information signals from said signal outputted by said reading means; and switching means for switching reproducing mode of said reproducing means in accordance with each type of information to be read out by said reading means.
Claim 14
Dependent Claim
83 words
An information reproducing apparatus comprising: a recording medium having different types of first and second information signals recorded in a manner different from each other; reading means for reading out said information signals recorded on said recording medium and outputting a signal; reproducing means for reproducing said information signals from said signal outputted by said reading means; and switching means for switching reproducing mode of said reproducing means in accordance with each type of information to be read out by said reading means.
Claim 15
Dependent Claim
35 words
An information reproducing apparatus according to claim 12, wherein said reproducing means includes means for converting an analog signal into a digital signal and said switching means switches a threshold value of said converting means.
Claim 16
Dependent Claim
28 words
An information reproducing apparatus according to claim 13, wherein said reproducing means includes a plurality of converting means, and said switching means selects one plurality of converting means.
Claim 17
Dependent Claim
19 words
An information reproducing apparatus according to claim 12, wherein said recording medium is constituted by an optical recording medium.
Claim 18
Dependent Claim
31 words
An information reproducing apparatus according to claim 15, wherein said first information signal is recorded by lithography, and said second information signal is recorded by the irradiation of a light beam.
Claim 19
Dependent Claim
48 words
An information reproducing apparatus according to claim 16, wherein said recording medium has a plurality of information recording tracks, said first information signal has a track number which is preformatted on said recording medium, and said second information signal has an information signal recorded on said recording tracks.
Claim 20
Dependent Claim
26 words
An information reproducing apparatus according to claim 15, wherein said reading means includes light beam generating means for irradiating a light beam to said recording medium.
Claim 21
Dependent Claim
56 words
An information reproducing apparatus according to claim 12, wherein said reading means outputs a first signal corresponding to said first information signal and outputs a second signal corresponding to said second information signal, and said reproducing means reproduces said first information signal from said first signal and reproduces said second information signal from said second signal.
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) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |