US4951144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recursive video blur effect
Assignee: Grass Valley USA LLC
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Filing: 1989-04-12
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Granted: 1990-08-21
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Expires: 2009-04-12
Abstract
Abstract A recursive video blur effect is obtained by inserting a lowpass filter into a recursive feedback loop. Each pass of an output video signal through the recursive feedback loop successively smears the image represented by the video signal so that, when combined with an input video signal to produce the output video signal, a smoky fade effect is produced.
Inventors
- 👤 Philip A. Des Jardins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
A circuit of the type having a recursive feedback loop including means for delaying an output video signal, means for decaying the delayed output video signal, and means for combining the decayed output video signal with an input video signal to produce the output video signal further comprising means for lowpass filtering the delayed output video signal before the combining means to produce a video blur effect in the output video signal.
Claim 2
Dependent Claim
72 words
A circuit of the type having a recursive feedback loop including means for delaying an output video signal, means for decaying the delayed output video signal, and means for combining the decayed output video signal with an input video signal to produce the output video signal further comprising means for lowpass filtering the delayed output video signal before the combining means to produce a video blur effect in the output video signal.
Claim 3
Independent Claim
47 words
An apparatus for producing a recursive video blur effect comprising: means for delaying an output video signal; means for lowpass filtering the delayed output video signal; and means for combining the filtered delayed output video signal with an input video signal to produce the output video signal.
Claim 4
Independent Claim
47 words
An apparatus for producing a recursive video blur effect comprising: means for delaying an output video signal; means for lowpass filtering the delayed output video signal; and means for combining the filtered delayed output video signal with an input video signal to produce the output video signal.
Claim 5
Dependent Claim
25 words
An apparatus as recited in claim 2 further comprising means for decaying the filtered delayed output video signal prior to input to the combining means.
Claim 6
Dependent Claim
27 words
An apparatus as recited in claim 2 further comprising means for varying parameters of the lowpass filtering means so that the recursive video blur effect is non-uniform.
Claim 7
Independent Claim
47 words
An apparatus for producing a recursive video blur effect comprising: means for lowpass filtering an output video signal; means for delaying the filtered output video signal; and means for combining the delayed filtered output video signal with an input video signal to produce the output video signal.
Claim 8
Independent Claim
47 words
An apparatus for producing a recursive video blur effect comprising: means for lowpass filtering an output video signal; means for delaying the filtered output video signal; and means for combining the delayed filtered output video signal with an input video signal to produce the output video signal.
Claim 9
Dependent Claim
25 words
An apparatus as recited in claim 5 further comprising means for decaying the delayed filtered output video signal prior to input to the combining means.
Claim 10
Dependent Claim
26 words
An apparatus as recited in claim 5 further comprising means for varying parameters of the lowpass filtering means so that the recursive video blur is non-uniform.
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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |