US5075781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image signal processing device with skew-compensation effected prior to signal component separation
Assignee: Canon Inc
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Filing: 1989-05-31
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Granted: 1991-12-24
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Expires: 2009-05-31
Abstract
Abstract A device for processing a recorded signal obtained by frequency-multiplexing one field portion of an image signal with an information signal related to the image signal performs skew compensation at a processing juncture preceding separation of the multiplexed signals. In a preferred practice, multiplexed color-difference line-sequential and information signal components of an image signal and are skew-compensated in multiplexed form and then separated into respective individual signals.
Inventors
- 👤 Tomotaka Muramoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/87; H04N9/89; H04N9/80; H04N9/82; H04N9/8205; H04N9/8233; H04N9/86
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
An image signal processing device for use with a recording medium bearing a frequency multiplex signal obtained by frequency multiplexing one field portion of an image signal and an information signal related to the image signal, comprising: a) reproducing means for reproducing the frequency multiplex signal from the recording medium; b) skew compensating means for skew-compensating the frequency multiplex signal to output a skew-compensated frequency multiplex signal; c) information signal separating means for separating the information signal from the skew-compensated frequency multiplex signal output from said skew compensating means; and d) image signal separating means for separating the image signal from the skew-compensated frequency multiplex signal output from said skew compensating means.
Claim 2
Dependent Claim
112 words
An image signal processing device for use with a recording medium bearing a frequency multiplex signal obtained by frequency multiplexing one field portion of an image signal and an information signal related to the image signal, comprising: a) reproducing means for reproducing the frequency multiplex signal from the recording medium; b) skew compensating means for skew-compensating the frequency multiplex signal to output a skew-compensated frequency multiplex signal; c) information signal separating means for separating the information signal from the skew-compensated frequency multiplex signal output from said skew compensating means; and d) image signal separating means for separating the image signal from the skew-compensated frequency multiplex signal output from said skew compensating means.
Claim 3
Dependent Claim
35 words
A device according to claim 1, wherein the image signal includes a horizontal synchronizing signal, and wherein the information signal includes a signal component which has been modulated in synchronism with said horizontal synchronization signal.
Claim 4
Dependent Claim
71 words
A device according to claim 2, further comprising: synchronizing signal separating means for separating the horizontal synchronizing signal from the skew-compensated frequency multiplex signal output from said skew compensating means; and 2) demodulation means receiving the information signal separated from said information signal separating means and the horizontal synchronizing signal separated by said synchronizing signal separating means for demodulating the received information signal in synchronism with the received horizontal synchronizing signal.
References Cited (Backward Citations)
US4750054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |