US4240101A
Expired / Lapsed
US
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Television standards conversion
Assignee: Quantel Ltd
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Filing: 1979-02-27
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Granted: 1980-12-16
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Expires: 1999-02-27
Abstract
Abstract Digital standards conversion from one T.V. line standard to another including a processor for synthesizing picture points from adjacent picture point information derived from video signals from at least one field and a digital persistence arrangement for effecting movement interpolation between incoming and stored information. The digital persistence may be cylically varied field by field as well as being variable in dependence on any picture movement detected.
Inventors
- 👤 Peter C. Michael
- 👤 Richard J. Taylor
- 👤 Martin R. Trump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:25
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0135; H04N7/0137; G; G06; G06T; G06T7/00; G06T7/20; G06T7/254
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
54 words
A digital standards converter for video signals comprising: processor means for synthesising picture points from adjacent picture point information derived from the video signals from at least one field; video storage means for storing the information from at least one field; and digital persistence means for effecting movement interpolation between incoming and stored information.
Claim 2
Dependent Claim
54 words
A digital standards converter for video signals comprising: processor means for synthesising picture points from adjacent picture point information derived from the video signals from at least one field; video storage means for storing the information from at least one field; and digital persistence means for effecting movement interpolation between incoming and stored information.
Claim 3
Dependent Claim
26 words
A converter according to claim 1 wherein the digital persistence means includes cyclic control means for effecting cyclic control of the degree of digital persistence selected.
Claim 4
Dependent Claim
23 words
A converter according to claim 2 wherein at least two video storage means are provided to effect both recursive and non-recursive cyclic persistence.
Claim 5
Dependent Claim
55 words
A converter according to claim 3 wherein the output from said first video storage means is applied to one input of adder means via a first modifier means and the output from said second video storage means is applied to another input of the adder means to provide modified video data at the adder output.
Claim 6
Dependent Claim
24 words
A converter according to claim 4 wherein the first and second modifier means comprise multipliers adapted to apply cyclically varying coefficients to the data.
Claim 7
Dependent Claim
34 words
A converter according to claim 5 wherein the modifier means are adapted to apply coefficients which vary on a field by field basis, the coefficients being selected to be different for each modifier means.
Claim 8
Dependent Claim
28 words
A converter according to claim 2 wherein the digital persistence means includes at least one coefficient modifier for determining the amount of digital persistence applied to the system.
Claim 9
Dependent Claim
48 words
A converter according to claim 7 wherein the digital persistence means includes a subtractor for subtracting incoming and stored picture point information, a coefficient modifier for modifying picture point information received from said subtractor and an adder for adding the modifier output to the incoming or stored information.
Claim 10
Dependent Claim
21 words
A converter according to claim 7 wherein the modifiers comprise multipliers for modifying the picture point information by a selected coefficient.
Claim 11
Dependent Claim
44 words
A converter according to claim 9 wherein storage means are provided to store a number of coefficients for use by the multipliers and said cyclic control means effect selection of the stored coefficients to vary the coefficients on a cyclic basis field by field.
Claim 12
Dependent Claim
21 words
A converter according to claim 10 wherein the cyclic control means includes means for counting field pulses to determine field changes.
Claim 13
Dependent Claim
62 words
A converter according to claim 2 wherein the digital persistence means includes a first coefficient modifier for modifying picture point information received from said processor means, adder means for adding the output from said first modifier to stored data modified by means of a second modifier and third modifier means for modifying the adder output prior to storage in the storage means.
Claim 14
Dependent Claim
25 words
A converter according to claim 2 wherein a movement detector is provided to effect additional variation in the persistence in dependence on any movement detected.
Claim 15
Dependent Claim
24 words
A converter according to claim 13 wherein the movement detector is adapted to detect movement from a number of picture points from different fields.
Claim 16
Dependent Claim
33 words
A converter according to claim 13 wherein the movement detector is adapted to detect movement from a number of picture points contained in a vertical line of the picture to detect camera panning.
Claim 17
Dependent Claim
30 words
A converter according to claim 1, wherein the processor means comprises a volume processor for receiving picture point information from a plurality of picture points from more than one field.
Claim 18
Dependent Claim
31 words
A converter according to claim 16 wherein the volume processor is adapted to receive picture point information from a single line of one picture and from two lines of another picture.
Claim 19
Dependent Claim
39 words
A converter according to claim 16 wherein the volume processor includes selector means for varying the amount of picture point information from a preceding field used with the incoming information in dependence on any picture movement detected between fields.
Claim 20
Dependent Claim
38 words
A converter according to claim 18 wherein the volume processor includes a multiplier for each received picture point to effect modification by a selected coefficient and adder means for summing the outputs to provide the synthesised picture point.
Claim 21
Dependent Claim
13 words
A converter according to claim 19 wherein the multipliers comprise random access memories.
Claim 22
Dependent Claim
22 words
A converter according to claim 19 wherein movement detector means are provided to control the coefficients selected for use by the multipliers.
Claim 23
Dependent Claim
50 words
A converter according to claim 21 wherein the movement detector includes a subtractor for determining the difference between incoming and stored data and wherein coefficient storage means are provided for storing a number of coefficients for use by the multipliers, the selection being effected in dependence on the detected movement.
Claim 24
Dependent Claim
18 words
A converter according to claim 1 including means for generating a movement code to accompany the video data.
Claim 25
Dependent Claim
29 words
A converter according to claim 1 including means for generating a colour code to accompany the video data indicative of whether the video data contains chrominance or luminance information.
Claim 26
Dependent Claim
20 words
A converter according to claim 1 wherein the video storage means comprises an asynchronous store to accommodate differing field rates.
Claim 27
Independent Claim
58 words
A method of effecting standards conversion on video signals comprising: synthesising a number of picture points from adjacent picture point information derived from the video signals from at least one field; storing the information from at least one field and adding a portion of the stored information to the incoming information to effect digital persistence for movement interpolation.
Claim 28
Independent Claim
58 words
A method of effecting standards conversion on video signals comprising: synthesising a number of picture points from adjacent picture point information derived from the video signals from at least one field; storing the information from at least one field and adding a portion of the stored information to the incoming information to effect digital persistence for movement interpolation.
Claim 29
Dependent Claim
15 words
A method according to claim 26 including cyclically varying the degree of digital persistence selected.
Claim 30
Dependent Claim
19 words
A method according to claim 27 including storing the information twice to effect both recursive and non-recursive cyclic persistence.
Claim 31
Dependent Claim
28 words
A method according to claim 28 including modifying the stored information on a cyclic basis field by field from each storage step and adding the cyclically modified information.
Claim 32
Dependent Claim
22 words
A method according to claim 26 including detecting any movement occurring between fields to modify the picture point synthesis and digital persistence.
Claim 33
Dependent Claim
29 words
A method according to claim 26 wherein the picture points are synthesised from picture point information from one line of one field and from two lines of another field.
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) | 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 |