US4015285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recording television signals on a data carrier and a recording obtained by said method
Assignee: Thomson-Brandt SA
•
Filing: 1975-01-09
•
Granted: 1977-03-29
•
Expires: 1995-01-09
Abstract
Abstract The invention relates to the recording of television signals upon an optically readable data carrier. The invention provides a method which consists in recording video information line by line on each track element. A revolution of the recording involves an even number of equal recording sections alloted to a sequence of signals items representative of the line succession.
Inventors
- 👤 Rene Romeas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:53
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N5/00; H04N5/76; H04N5/7605; H04N9/80; H04N9/82
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
173 words
A method of recording a color television signal at the surface of a rotatable data carrier, said signal comprising a sequence of items respectively carrying video information pertaining to the successive scan lines of a television image, said sequence having alternate lines with alternate color phase, said method comprising the steps of: rotating said record carrier at uniform speed; recording said items in the form of a track made of successive turns lying in said surface; splitting each said turns into N successive equal sections of a revolution of said data carrier, and respectively storing said sequence of items within said successive equal sections; two items of said sequence stored along immediately adjacent turns and located within one of said successive equal sections being separated from one another by an odd number of intermediate items; N being an even integer differing by an integer from the number of said scan lines in one frame of said color television signal; said uniform speed being adjusted for making said items register with said equal sections.
Claim 2
Independent Claim
173 words
A method of recording a color television signal at the surface of a rotatable data carrier, said signal comprising a sequence of items respectively carrying video information pertaining to the successive scan lines of a television image, said sequence having alternate lines with alternate color phase, said method comprising the steps of: rotating said record carrier at uniform speed; recording said items in the form of a track made of successive turns lying in said surface; splitting each said turns into N successive equal sections of a revolution of said data carrier, and respectively storing said sequence of items within said successive equal sections; two items of said sequence stored along immediately adjacent turns and located within one of said successive equal sections being separated from one another by an odd number of intermediate items; N being an even integer differing by an integer from the number of said scan lines in one frame of said color television signal; said uniform speed being adjusted for making said items register with said equal sections.
Claim 3
Dependent Claim
24 words
A method as claimed in claim 1, wherein said data carrier is a disc; said turns being constituted by the turns of a spiral.
Claim 4
Dependent Claim
47 words
A method as claimed in claim 1, wherein for recording a television signal comprising an odd number of lines per frame, said method consists in the recording of an even number of said items on each of said turns and with each revolution of said data carrier.
Claim 5
Dependent Claim
26 words
A method as claimed in claim 3, wherein said even number of items and said odd number of lines differ from one another by one unit.
Claim 6
Dependent Claim
48 words
A method as claimed in claim 1, wherein for recording a television signal comprising twice an odd number of lines per frame, said method consists in the recording of an even number of said lines on each of said turns, this with each revolution of said data carrier.
Claim 7
Dependent Claim
20 words
A method as claimed in claim 5, wherein said even and odd numbers differ from one another by one unit.
Claim 8
Dependent Claim
125 words
Record of color television signals comprising: a sequence of items respectively carrying video information pertaining to successive scan lines of a television image, said sequence having alternate lines with alternate color phase, said record comprising a data carrier having a rotation axis, and at the surface of which said television signals are recorded in accordance with a track made of successive turns lying in said surface; each said turns being subdivided into N successive equal sections of a revolution of said data carrier; said N equal sections respectively storing said sequence of items; the number N of said equal sections per revolution, being an even number differing by an integer from the number of said scan lines in one frame of said color television signals.
Claim 9
Dependent Claim
125 words
Record of color television signals comprising: a sequence of items respectively carrying video information pertaining to successive scan lines of a television image, said sequence having alternate lines with alternate color phase, said record comprising a data carrier having a rotation axis, and at the surface of which said television signals are recorded in accordance with a track made of successive turns lying in said surface; each said turns being subdivided into N successive equal sections of a revolution of said data carrier; said N equal sections respectively storing said sequence of items; the number N of said equal sections per revolution, being an even number differing by an integer from the number of said scan lines in one frame of said color television signals.
Claim 10
Dependent Claim
20 words
Record as claimed in claim 7, wherein said data carrier is a disc; turns being the turns of a spiral.
Claim 11
Dependent Claim
16 words
Record as claimed in claim 7, wherein said television frame comprises an odd number of lines.
Claim 12
Dependent Claim
19 words
Record as claimed in claim 9, wherein said odd number differs by one unit, from said even number N.
Claim 13
Dependent Claim
30 words
Record as claimed in claim 7, wherein said frame comprises a number of lines equal to twice an odd number, said odd number being close to said even number N.
Claim 14
Dependent Claim
19 words
Record as claimed in claim 11, wherein said odd number differs by one unit from said even number N.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |