US3763328A
Expired / Lapsed
US
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Gap elimination in scanned recordings
Assignee: General Electric Co
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Filing: 1972-01-28
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Granted: 1973-10-02
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Expires: 1992-01-28
Abstract
Abstract In scanning signal recording systems, the information gap introduced at the end of each scan can be eliminated by utilizing time compression and expansion of the signal being recorded. During recording, the input signal is divided into time segments and time compressed into a new segment having a duration shorter than the length of a scan. During playback, the shortened segments are read out and time expanded to form a continuous signal.
Inventors
- 👤 H Lester
- 👤 W Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:55
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/12; G11B20/1201; G11B20/00007
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
137 words
Apparatus for eliminating gaps in continuous information recorded as a series of scans comprising: first switch means for dividing said information into two channels wherein each channel contains alternate time segments; first variable delay means coupled to said switch means for time compressing each segment; recording means coupled to said first delay means for recording each compressed segment as a scan on a recording medium; second variable delay means coupled to the output of said recording means for time expanding each scan to form a plurality of time expanded segments; control means, coupled to said switch means and said firSt and second variable delay means, for synchronously varying the delay exhibited the first and second delay means with the actuation of said switch means; and means for combining said time expanded segments into a continuous information signal.
Claim 2
Dependent Claim
137 words
Apparatus for eliminating gaps in continuous information recorded as a series of scans comprising: first switch means for dividing said information into two channels wherein each channel contains alternate time segments; first variable delay means coupled to said switch means for time compressing each segment; recording means coupled to said first delay means for recording each compressed segment as a scan on a recording medium; second variable delay means coupled to the output of said recording means for time expanding each scan to form a plurality of time expanded segments; control means, coupled to said switch means and said firSt and second variable delay means, for synchronously varying the delay exhibited the first and second delay means with the actuation of said switch means; and means for combining said time expanded segments into a continuous information signal.
Claim 3
Dependent Claim
30 words
Apparatus as set forth in claim 1 wherein said first and second variable delay means each comprise a voltage variable delay line and said control means comprises a sawtooth generator.
Claim 4
Dependent Claim
89 words
Apparatus as set forth in claim 1 wherein said first and second variable delay means comprise a pair of dispersive delay lines exhibiting a frequency dependent delay characteristic and said control means comprises: waveform generator means for producing a variable voltage output signal; voltage controlled oscillator means coupled to said waveform generator means for producing a variable frequency output signal; and mixer means coupled to said voltage controlled oscillator for combining said segments with said variable frequency output signal and coupling the combined signals to said dispersive delay lines.
Claim 5
Dependent Claim
17 words
Apparatus as set forth in claim 3 wherein said waveform generator means comprises a sawtooth waveform generator.
Claim 6
Dependent Claim
121 words
Apparatus for recording continuous information in discrete segments comprising: switch means receiving said information for dividing said information into two channels wherein each channel contains alternate time segments; a pair of voltage variable delay lines connected one each to said channels for receiving alternate time segments from said switch means; control means for producing a variable output voltage coupled to said delay lines for delaying the initial portion of each segment a greater amount than the terminal portion to time compress each segment; combining means coupled to said delay lines for combining the alternate time compressed segments into a single signal comprising said time compressed segments and time gaps of predetermined width therebetween; and recording means for recording said combined signal.
Claim 7
Dependent Claim
121 words
Apparatus for recording continuous information in discrete segments comprising: switch means receiving said information for dividing said information into two channels wherein each channel contains alternate time segments; a pair of voltage variable delay lines connected one each to said channels for receiving alternate time segments from said switch means; control means for producing a variable output voltage coupled to said delay lines for delaying the initial portion of each segment a greater amount than the terminal portion to time compress each segment; combining means coupled to said delay lines for combining the alternate time compressed segments into a single signal comprising said time compressed segments and time gaps of predetermined width therebetween; and recording means for recording said combined signal.
Claim 8
Dependent Claim
95 words
Apparatus for producing a continuous information signal from a discontinuous, segmented information signal comprising: a pair of voltage variable delay lines; switch means receiving said segmented information for switching alternate segments into one or the other of said pair of delay lines; control means for producing a variable output voltage coupled to said delay lines for delaying the initial portion of each segment a lesser amount than the terminal portion to time expand each segment; and combining means coupled to said delay lines for combining the alternate, time expanded segments into a continuous information signal.
Claim 9
Dependent Claim
95 words
Apparatus for producing a continuous information signal from a discontinuous, segmented information signal comprising: a pair of voltage variable delay lines; switch means receiving said segmented information for switching alternate segments into one or the other of said pair of delay lines; control means for producing a variable output voltage coupled to said delay lines for delaying the initial portion of each segment a lesser amount than the terminal portion to time expand each segment; and combining means coupled to said delay lines for combining the alternate, time expanded segments into a continuous information signal.
Claim 10
Independent Claim
84 words
The method for eliminating gaps in continuous information recorded as a series of scans comprising the steps of: dividing said continuous information into a plurality of time segments; separating said time segments into two channels of information wherein alternate time segments are in each channel; time compressing each segment by delaying an initial portion of each segment more than the remainder of that segment; combining said channels to produce discontinuous information; and recording each compressed segment as a complete scan on a recording medium.
Claim 11
Independent Claim
84 words
The method for eliminating gaps in continuous information recorded as a series of scans comprising the steps of: dividing said continuous information into a plurality of time segments; separating said time segments into two channels of information wherein alternate time segments are in each channel; time compressing each segment by delaying an initial portion of each segment more than the remainder of that segment; combining said channels to produce discontinuous information; and recording each compressed segment as a complete scan on a recording medium.
Claim 12
Dependent Claim
64 words
The method as set forth in claim 7 further comprising the steps of: reading out the compressed segments from said recording medium; separating said segments into two channels of information wherein alternate segments are in each channel; time expanding each segment by delaying an initial portion of each segment less than the remainder of that segment; and combining the segments to form continuous information.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |