US3819874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data recording and reproducing system
Assignee: Mitsubishi Electric Corp
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Filing: 1973-08-03
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Granted: 1974-06-25
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Expires: 1993-08-03
Abstract
Abstract Gating pulses are incrementally delayed with respect to the associated horizontal blanking pulses for an electronic flyingspot scanner in response to successive vertical blanking pulses for the scanner to sample an audio signal to cause the samples to intensity modulate a flying spot on the scanner. The modulated flying spot progressively sweeps a record medium in the horizontal direction to record the samples of the signal into a matrix on the medium. The recorded samples are interlaced in the flying-spot scanning direction in which the rows of the matrix are arranged. Alternatively, with no gating pulse used, the modulated flying spot may progressively sweep a record medium in the vertical direction to record the audio signal on a plurality of spaced parallel tracks on the medium. Upon reproducing the scanner sweep the samples or tracks in the horizontal direction to reproduce the signal on the basis of the real time as if they would scan in the vertical direction at a low rate.
Inventors
- 👤 Y Fujio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:52
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/002; G11B7/003; H; H04; H04N; H04N5/00; H04N5/76; H04N5/84; H04N5/91; H04N5/92; H04N5/9201; H04N9/00; H04N9/79; H04N9/80; H04N9/802
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
A data reproducing system for simultaneously reproducing an audio and a picture type of information recorded, respectively, in two juxtaposed regions on an optical record medium, comprising a single source of light for emitting a light beam, means for splitting said light beam into first and second beam portions, scanning means for causing said first beam portion to sequentially scan the picture region to directly reproduce the picture type of information and for causing said second beam portion to sequentially scan the audio region in the same direction as said first beam portion, said audio type of information including audio data arranged in the form of a matrix having rows and columns, the audio data being sequentially located in the columns one below the other and in columns following each other on the basis of real time, aid scanning means causing said second beam portion to repeatedly scan the audio region in the direction of the rows and means for selectively selecting the audio data in each column, one below the other and in columns following each other, whereby the audio type of information is reproduced.
Claim 2
Dependent Claim
186 words
A data reproducing system for simultaneously reproducing an audio and a picture type of information recorded, respectively, in two juxtaposed regions on an optical record medium, comprising a single source of light for emitting a light beam, means for splitting said light beam into first and second beam portions, scanning means for causing said first beam portion to sequentially scan the picture region to directly reproduce the picture type of information and for causing said second beam portion to sequentially scan the audio region in the same direction as said first beam portion, said audio type of information including audio data arranged in the form of a matrix having rows and columns, the audio data being sequentially located in the columns one below the other and in columns following each other on the basis of real time, aid scanning means causing said second beam portion to repeatedly scan the audio region in the direction of the rows and means for selectively selecting the audio data in each column, one below the other and in columns following each other, whereby the audio type of information is reproduced.
Claim 3
Dependent Claim
93 words
A data reproducing system according to claim 1 including a flying spot scanner means and wherein said source of light is in the form of a flying spot from said electronic flying spot scanner means, the system further including optical to electrical conversion means for receiving said second beam portion transmitted through said audio region for converting said beam portion to an electrical signal corresponding to the respective audio data to be reproduced, and said means for selecting including means for sequentially sampling this electrical signal to reproduced the audio type of information.
Claim 4
Dependent Claim
112 words
A data reproducing system according to claim 2 further including a horizontal deflection circuit and a vertical deflection circuit operatively connected to said flying spot scanner means, a gating circuit connected to said optical to electrical conversion means, a pulse generator circuit for generating gating pulses in synchronization with horizontal retrace pulses from said horizontal deflection circuit and control means responsive to each of the vertical blanking pulses from said vertical deflection circuit to progressively move the temporal position of the gating pulse relative to the associated horizontal blanking pulse, the gating circuit being operative in response to the gating pulses to sequentially sample tHe electrical signal corresponding to the audio data.
Claim 5
Dependent Claim
72 words
A data reproducing system according to claim 3 wherein said control means includes integration means for integrating a predetermined number of said vertical blanking pulses to generate a step waveform, said pulse generator circuit includes means for generating sawtooth waveforms in synchronization with the horizontal blanking pulses, and means for combining said sawtooth waveform with said step waveform to form gating pulses incrementally delayed with respect to the associated horizontal blanking pulses.
Claim 6
Dependent Claim
86 words
A data reproducing system according to claim 3 wherein said control means includes means for generating a first sawtooth waveform having a repetition period equal to the time interval required for entirely reading out the audio type of information, said gating pulse generator circuit includes means for generating a second sawtooth waveform in synchronization with the horizontal blanking pulses, and means for combining the second waveform with the first sawtooth waveform to form the gating pulses incrementally delayed with respect to the associated horizontal blanking pulses.
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |