US6115502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise filtering
Assignee: US Philips Corp
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Filing: 1997-10-15
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Granted: 2000-09-05
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Expires: 2017-10-15
Abstract
Abstract In a motion-dependent noise filtering (MD, NRF), a received image signal and a delayed (3) image signal are combined in dependence upon both a local amount of motion and a global amount of motion in the image signals.
Inventors
- 👤 Gerard De Haan
- 👤 Pieter J. Snijder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:14
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/21; H04N5/44
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
65 words
A motion-dependent method of filtering noise, the method comprising the steps of: determining (5-13) a local characteristic in an image signal; determining (5, 21, 23) a global amount of motion in the image signal; and combining (1) a received image signal and a delayed (3) image signal in dependence upon both (25) said local characteristic and said global amount of motion in the image signal.
Claim 2
Dependent Claim
65 words
A motion-dependent method of filtering noise, the method comprising the steps of: determining (5-13) a local characteristic in an image signal; determining (5, 21, 23) a global amount of motion in the image signal; and combining (1) a received image signal and a delayed (3) image signal in dependence upon both (25) said local characteristic and said global amount of motion in the image signal.
Claim 3
Dependent Claim
17 words
A method as claimed in claim 1, wherein said local characteristic is a local amount of motion.
Claim 4
Dependent Claim
32 words
A method as claimed in claim 2, wherein said global amount of motion determining step (5, 21, 23) includes the step of summing (23) said local amount of motion over the image.
Claim 5
Dependent Claim
35 words
A method as claimed in claim 2, wherein said global amount of motion determining step (5, 21, 23) includes the step of summing (23) said local amount of motion over a plurality of field periods.
Claim 6
Dependent Claim
19 words
A method as claimed in claim 4, wherein said plurality of field periods include at least two movement phases.
Claim 7
Dependent Claim
35 words
A method as claimed in claim 2, wherein said combining step includes the step of adding (25) said local amount of motion and said global amount of motion to obtain a filtering control signal (k).
Claim 8
Dependent Claim
25 words
A method as claimed in claim 1, wherein said global amount of motion determining step (5, 21, 23) includes the step of summing motion vectors.
Claim 9
Dependent Claim
26 words
A method as claimed in claim 7, wherein said motion vector summing step includes the step of summing horizontal and vertical components of said motion vectors.
Claim 10
Dependent Claim
29 words
A method as claimed in claim 1, wherein said global amount of motion determining step (5, 21, 23) includes the step of summing (23) a non-linearly processed (21) signal.
Claim 11
Dependent Claim
72 words
A motion-dependent noise filtering circuit (MD, NRF), comprising: means (5-13) for determining a local characteristic in an image signal; means (5, 21, 23) for determining a global amount of motion in the image signal; and means (1) for combining a received image signal and a delayed image signal in dependence upon both (25) said local characteristic and said global amount of motion in the image signal, to obtain a noise filtered signal.
Claim 12
Dependent Claim
72 words
A motion-dependent noise filtering circuit (MD, NRF), comprising: means (5-13) for determining a local characteristic in an image signal; means (5, 21, 23) for determining a global amount of motion in the image signal; and means (1) for combining a received image signal and a delayed image signal in dependence upon both (25) said local characteristic and said global amount of motion in the image signal, to obtain a noise filtered signal.
Claim 13
Dependent Claim
22 words
A motion-dependent noise filtering circuit (MD, NRF) as claimed in claim 10, wherein said local characteristic is a local amount of motion.
Claim 14
Dependent Claim
28 words
An image display apparatus, comprising: a motion-dependent noise filtering circuit (MD, NRF) as claimed in claim 10; and a display unit (DU) for displaying said noise filtered signal.
Claim 15
Dependent Claim
51 words
A multi-media apparatus for processing image signals and at least one other item from a group including data, text and/or sound, the apparatus comprising: a motion-dependent noise filtering circuit (MD, NRF) as claimed in claim 10; and means for furnishing said noise filtered signal and/or said at least one other item.
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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) | 2003-09-05 | 2004-03-06 | 2004-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-09-05 | 2008-03-06 | 2008-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-09-05 | 2012-03-06 | 2012-09-05 | $7700.00 | Window Closed / Lapsed |