US3832487A
Expired / Lapsed
US
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Method of converting image signals generated in a non-interlaced manner into image signals interlaced in accordance with a television standard
Assignee: US Philips Corp
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Filing: 1972-11-29
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Granted: 1974-08-27
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Expires: 1992-11-29
Abstract
Abstract A method of converting image signals L1, L2 L3 . . . Ln generated in a non-interlaced manner for standard display into interlaced signals L1, L3 . . . and L2, L4 . . . The image signals are split up into three groups L1, L4 . . . L2, L5 . . . and L3, L6 . . . whereafter the duration of occurrence of the image signals is extended from one line period to two subsequent line periods. Subsequently two groups of image signals L1, L3, L5 . . . and L2, L4, L6 . . . occurring for two line periods are formed which are separately and simultaneously written in a store. By reading out the store at a rate which is twice as fast signals which are interlaced in accordance with the standards become successively available.
Inventors
- 👤 Niet E De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:47
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0105
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
An arrangement for converting image signals generated in a non-interlaced manner into image signals interlaced in accordance with a television standard, comprising means for splitting the group of image signals generated in a non-interlaced manner into a first plurality of groups of alternate image signals, means coupled to said splitting means for time expanding said first plurality of signals to occur within a duration of more than one subsequent line periods, means coupled to said expending means for composing the expanded signals to form a second plurality of groups of image signals occurring in a third plurality of line periods, a store, means coupled to said store for simultaneously writing said second plurality of signals in at a given rate and each at its own location in said store and for reading out at a rate faster than said given rate, thereby providing in one group successively the second plurality of groups of image signals occurring in one line period and interlaced in accordance with the standard.
Claim 2
Dependent Claim
167 words
An arrangement for converting image signals generated in a non-interlaced manner into image signals interlaced in accordance with a television standard, comprising means for splitting the group of image signals generated in a non-interlaced manner into a first plurality of groups of alternate image signals, means coupled to said splitting means for time expanding said first plurality of signals to occur within a duration of more than one subsequent line periods, means coupled to said expending means for composing the expanded signals to form a second plurality of groups of image signals occurring in a third plurality of line periods, a store, means coupled to said store for simultaneously writing said second plurality of signals in at a given rate and each at its own location in said store and for reading out at a rate faster than said given rate, thereby providing in one group successively the second plurality of groups of image signals occurring in one line period and interlaced in accordance with the standard.
Claim 3
Dependent Claim
99 words
Arrangement as claimed in claim 1, wherein said splitting means comprises a controlled change-over switch having an input means for receiving said non-interlaced signals and three outputs; said expansion means comprising three expansion stages each having an input and an output each input coupled to a different switch output, said composing means comprising two controlled change over switches, each having three inputs and one output, the outputs of said three expansion stages being coupled to said three inputs of each of said two controlled change-over switches, said change-over switch outputs being coupled to the store having separate signal storage.
Claim 4
Dependent Claim
38 words
An arrangement as claimed in claim 2, wherein said reading and writing means comprises a clock pulse generator, serially coupled frequency dividers coupled to said generator, and signal generators coupled to said dividers and to the change-over switches.
Claim 5
Dependent Claim
95 words
An arrangement as claimed in claim 3, wherein the three expansion stages each comprise capacitors, controlled semiconductors coupled between said capacitors, said expanding means comprising three controlled change-over switches coupled to said semiconductors, and to the clock pulse generator, and a 2-to-1 divider coupled to said clock and said switches, said change-over switches having control input means coupled to one of the said signal generators for effecting consecutively within a repetition period of three line periods only one of the three change-over switches passes on the clock pulses from the generator in one line period.
Claim 6
Dependent Claim
64 words
An arrangement as claimed in claim 4, wherein the product term of the division numbers of the series-arranged frequency dividers connected to the clock pulse generator divides to the standard line frequency is equal to or is larger than a product term of twice a line scan period occurring during the line period and a desired bandwidth of the image signals to be displAyed.
Claim 7
Dependent Claim
41 words
An arrangement as claimed in claim 3, further comprising an input means for receiving a synchronizing signal, a synchronizing signal generator coupled to said input means and to the store for providing a picture synchronizing signal and a field synchronizing signal.
Claim 8
Dependent Claim
48 words
An arrangement as claimed in claim 6, further comprising a frequency discriminator having a first input coupled to said synchronizing generator, an output means for providing a line synchronizing signal coupled to the clock pulse generator, and a second input coupled to one of the said frequency dividers.
Claim 9
Dependent Claim
69 words
An apparatus as claimed in claim 1, further comprising a camera coupled to said splitting means, and display arrangement coupled to said store, and a synchronizing signal generator means coupled to the camera for providing a picture synchronizing signal and a line synchronizing signal, to the store for providing a picture synchronizing signal and a field synchronizing signal and to the display arrangement for providing a field synchronizing signal.
Claim 10
Independent Claim
152 words
A method of converting line image signals successively generated in a non-interlaced manner into image signals interlaced in accordance with a television standard, said method comprising splitting the group of image signals generated in a non-interlaced manner into a first plurality of groups of alternate image signals, time expanding each of said first plurality of groups of signals to occur within a duration of more than one subsequent line periods, composing said expanded signals to form a second plurality of groups of image signals occurring in a third plurality of line periods, simultaneously writing in at a given rate and each at its own location in a store said second plurality of signals, reading out said stored signals at a rate faster than said given rate and providing in one group successively the second plurality of groups of image signals occurring in one line period and interlaced in accordance with the standard.
Claim 11
Independent Claim
152 words
A method of converting line image signals successively generated in a non-interlaced manner into image signals interlaced in accordance with a television standard, said method comprising splitting the group of image signals generated in a non-interlaced manner into a first plurality of groups of alternate image signals, time expanding each of said first plurality of groups of signals to occur within a duration of more than one subsequent line periods, composing said expanded signals to form a second plurality of groups of image signals occurring in a third plurality of line periods, simultaneously writing in at a given rate and each at its own location in a store said second plurality of signals, reading out said stored signals at a rate faster than said given rate and providing in one group successively the second plurality of groups of image signals occurring in one line period and interlaced in accordance with the standard.
Claim 12
Dependent Claim
66 words
A method as claimed in claim 9 wherein said standard has two field periods for each frame, said first plurality comprises three groups of signals, said expanded signals have a duration within two sequential line periods, said second plurality comprises two groups of signals, said third plurality of line periods comprise two line periods, and said reading rate is twice as fast as said writing rate.
References Cited (Backward Citations)
US3585293A
Cited
US3700795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |