Patent US4240106A successfully refreshed from Google Patents.
US4240106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video noise reduction
Assignee: Quantel Ltd
•
Filing: 1979-02-27
•
Granted: 1980-12-16
•
Expires: 1999-02-27
Abstract
Abstract A video noise reduction system including a coefficient modifier for modifying at least a portion of the incoming video information. Video storage is provided to store the modified information and an adder is provided for adding at least a portion of incoming picture information with at least a portion from a corresponding stored picture point from an earlier field. The noise reduced picture information is provided at the store output. The degree of noise reduction may be varied in dependence on movement detected between fields and whether luminance or chrominance components are present.
Inventors
- 👤 Peter C. Michael
- 👤 Richard J. Taylor
- 👤 Martin R. Trump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:58
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; G; G06; G06T; G06T7/00; G06T7/20; G06T7/254; H04N5/00; H04N5/14; H04N5/21
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
113 words
A video noise reduction system for incoming video information derived from a plurality of picture points, said system comprising: coefficient modifier means for modifying at least a portion of the incoming picture point information; video storage means for storing the modified picture point information; adder means for adding at least a portion of the stored picture point information to at least a portion of corresponding picture point information from an incoming field to provide noise reduced picture point information at the store output; and control means for adjusting the degree of modification effected by the coefficient modifier means in dependence on whether luminance or chrominance components are present when picture movement is occuring.
Claim 2
Dependent Claim
113 words
A video noise reduction system for incoming video information derived from a plurality of picture points, said system comprising: coefficient modifier means for modifying at least a portion of the incoming picture point information; video storage means for storing the modified picture point information; adder means for adding at least a portion of the stored picture point information to at least a portion of corresponding picture point information from an incoming field to provide noise reduced picture point information at the store output; and control means for adjusting the degree of modification effected by the coefficient modifier means in dependence on whether luminance or chrominance components are present when picture movement is occuring.
Claim 3
Dependent Claim
72 words
A system according to claim 1 wherein first coefficient modifier means are provided at the system input prior to the adder means, for receiving the incoming video information; second coefficient modifier means are provided between the adder means and the storage means input and feedback means are provided between an output of the store and the adder, each of the modifier means being capable of modifying the picture point information passing therethrough.
Claim 4
Dependent Claim
16 words
A system according to claim 2 wherein said feedback means includes a third coefficient modifier means.
Claim 5
Dependent Claim
21 words
A system according to claim 1 wherein subtractor means are provided for subtracting the stored video information from the incoming video.
Claim 6
Dependent Claim
18 words
A system according to claim 4 wherein the subtractor means are provided prior to the coefficient modifier means.
Claim 7
Dependent Claim
32 words
A system according to claim 4 wherein the adder means is provided between the coefficient modifier means and the store input to add the modifier means output to the stored video information.
Claim 8
Dependent Claim
33 words
A system according to claim 4 wherein the adder means is provided between the coefficient modifier means and the store input to add the modifier means output to the incoming picture point information.
Claim 9
Dependent Claim
45 words
A system as claimed in claim 1 wherein said video storage means comprises a three port system, a first port comprising the store input, a second port providing an output for feedback information and a third port for providing an output for noise reduced information.
Claim 10
Dependent Claim
44 words
A system according to claim 1 wherein the modifier means comprises a multiplier and said control means comprises a memory, said memory being capable of storing at least one value of the coefficient to be used in said multiplier to effect real time multiplication.
Claim 11
Dependent Claim
32 words
A system according to claim 9 wherein the memory has a plurality of locations for storing a coefficient to provide a variable amount of noise reduction in dependence on the coefficient selected.
Claim 12
Dependent Claim
30 words
A system according to claim 10 wherein a movement detector is provided for controlling the coefficient selected to reduce the amount of noise reduction in dependence on the detected movement.
Claim 13
Dependent Claim
30 words
A system according to claim 11 wherein the movement detector includes a subtractor for detecting any difference between at least one picture point of the incoming and stored video information.
Claim 14
Dependent Claim
35 words
A system according to claim 12 wherein the memory is connected to the subtractor of the movement detector to provide a value of the coefficient in dependence on the difference detected between the picture points.
Claim 15
Dependent Claim
21 words
A system according to claim 12 wherein the movement detector includes an integrator for detecting movement in the presence of noise.
Claim 16
Dependent Claim
29 words
A system according to claim 12 wherein the movement detector includes an area voting system for indicating movement when a number of picture points within the area indicate movement.
Claim 17
Dependent Claim
30 words
A system according to claim 11 wherein the movement detector includes a movement code generator for producing a movement code which can accommpany the video information passing through the system.
Claim 18
Dependent Claim
14 words
A system according to claim 9 wherein the multiplier comprises a read only memory.
Claim 19
Dependent Claim
58 words
A system according to claim 1 wherein a colour code generator is provided adjacent the system input for generating a code in dependence on whether luminance or chrominance components are present to enable said control means to provide variation of a coefficient for said coefficient modifier means to be effected whenever a change in the code is detected.
Claim 20
Dependent Claim
32 words
A system according to claim 1 wherein the storage means, coefficient modifier means, control means and the adder means are contained within an integrated video store and processor accessible by a computer.
Claim 21
Dependent Claim
38 words
A system according to claim 19 wherein the video store comprises a number of random access memories and the processor includes digital adders and multipliers and includes buffer storage to enable processing to be shared by common processors.
Claim 22
Dependent Claim
19 words
A system according to claim 19 wherein coefficient holding means are provided which hold coefficients accessible by the computer.
Claim 23
Independent Claim
71 words
A method of reducing noise contained in video picture point information comprising: modifying at least a portion of the incoming information; adjusting the degree of modification in dependence on whether luminance or chrominance components are present, when picture movement is occuring, storing the video information and adding at least a portion of the stored information to the incoming information to provide a reduction in the noise thereon after said adding step.
Claim 24
Independent Claim
71 words
A method of reducing noise contained in video picture point information comprising: modifying at least a portion of the incoming information; adjusting the degree of modification in dependence on whether luminance or chrominance components are present, when picture movement is occuring, storing the video information and adding at least a portion of the stored information to the incoming information to provide a reduction in the noise thereon after said adding step.
Claim 25
Dependent Claim
28 words
A method according to claim 22 including the step of modifying both the incoming and stored information prior to addition and effecting a further modification prior to storage.
Claim 26
Dependent Claim
21 words
A method according to claim 22 including the step of subtracting the incoming and stored information prior to the modifying step.
Claim 27
Dependent Claim
20 words
A method according to claim 24 wherein the stored data is added to the information provided by the modifying step.
Claim 28
Dependent Claim
20 words
A method according to claim 24 wherein the incoming data is added to the information provided by the modifying step.
Claim 29
Dependent Claim
18 words
A method according to claim 22 wherein the modifying step includes multiplying the information by a selected coefficient.
Claim 30
Dependent Claim
28 words
A method according to claim 27 including the step of detecting movement between at least one picture point to vary the selected coefficient in dependence on detected movement.
Claim 31
Dependent Claim
19 words
A method according to claim 28 including detecting movement between a number of picture points from different picture fields.
Claim 32
Dependent Claim
18 words
A method according to claim 22 including generating a movement code for controlling the degree of noise reduction.
Claim 33
Dependent Claim
36 words
A method according to claim 22 including generating a code signal indicative of whether luminance or chrominance components are present on incoming information to enable the degree of modification to be effected whenever the code changes.
References Cited (Backward Citations)
US4090221A
Cited
US4064530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |