EP0065365A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Digital television apparatus
Assignee: Sony Corp
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Filing: 1982-04-27
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Granted: —
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Expires: 2002-04-27
Abstract
Abstract Digital television apparatus comprises a field store arrangement (1) comprising first, second and third field stores (4, 5, 6) each capable of storing digital signals relating to one field of a television signal, means (2) to supply a digital television signal at a variable rate to the field store arrangement (1). a write control device (7) to supply the digital television signal to one or to two of the field stores (4, 5, 6) for writing therein, depending on the rate of supply of the digital television signal, and a read control device (8) to read the stored digital television signal from one or from two of the field stores (4,5,6), depending on the rate of supply of the television signal, no field store (4, 5, 6) being written into at the same time that it is read from, and the write control device (7) rotating the writing and reading around the field stores (4.5,6) cyclically.
Inventors
- 👤 Mark Christopher Collins
- 👤 John Goodwin Spencer Ive
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/937
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
142 words
Digital television apparatus comprising: a field store arrangement (1) comprising first, second and third field stores (4,5,6) each capable of storing digital signals relating to one field of a television signal; means (2) to supply a digital television signal at a variable rate to said field store arrangement (1); means (7) to supply said digital television signal to one or to two of said field stores (4,5,6) for writing therein, depending on said rate of supply of said digital television signal; means (8) to read said stored digital television signal from one or from two of said field stores (4,5,6), depending on said rate of supply of said television signal, no said field store (4,5,6) being written into at the same time that it is read from; and means (7) to rotate said writing and reading around said field stores (4,5,6) cyclically.
Claim 2
Dependent Claim
142 words
Digital television apparatus comprising: a field store arrangement (1) comprising first, second and third field stores (4,5,6) each capable of storing digital signals relating to one field of a television signal; means (2) to supply a digital television signal at a variable rate to said field store arrangement (1); means (7) to supply said digital television signal to one or to two of said field stores (4,5,6) for writing therein, depending on said rate of supply of said digital television signal; means (8) to read said stored digital television signal from one or from two of said field stores (4,5,6), depending on said rate of supply of said television signal, no said field store (4,5,6) being written into at the same time that it is read from; and means (7) to rotate said writing and reading around said field stores (4,5,6) cyclically.
Claim 3
Dependent Claim
80 words
Apparatus according to claim 1 wherein said means to supply said digital television signal is a digital video tape recorder (2) having a normal reproduction mode corresponding to normal motion reproduction of a recorded digital television signal and special reproduction modes corresponding to slow motion and fast motion reproduction of a recorded digital television signal, and wherein said stored digital television signal is read from said field store arrangement (1) at a rate suitable for reproduction on a television receiver.
Claim 4
Dependent Claim
103 words
Apparatus according to claim 2 wherein in said normal reproduction mode of said video tape recorder (2) said digital television signal is written into two said field stores (4,5,6) while being read from one said field store (4,5,6), in slow motion reproduction modes of said video tape recorder (2) said digital television signal is written into one said field store (4,5,6) while being read from one said field store (4,5,6), and in fast motion reproduction modes of said video tape recorder (2) said digital television signal is written into one said field store (4,5,6) while being read from two said field stores (4,5,6).
Claim 5
Dependent Claim
88 words
Apparatus according to claim 2 wherein said field stores (4,5,6) comprise a first field store (4), a second field store (5) and a third field store (6), and wherein in said normal reproduction mode of said video tape recorder (2) said digital television signal is read from said first field store (4) while being written into said second and third field stores (5,6), and is then read from said second field store (5) while being written into said third and first field stores (6,4), this sequence continuing cyclically.
Claim 6
Dependent Claim
102 words
Apparatus according to claim 2 wherein said field stores (4,5,6) comprise a first field store (4), a second field store (5) and a third field store (6), and wherein in slow motion reproduction modes of said video tape recorder (2) said digital television signal is repeatedly read from said first field store (4) while being written into said second field store (5) and then into said third field store (6), and is then repeatedly read from said second field store (5) while being written into said third field store (6) and then into said first field store (4), this sequence continuing cyclically.
Claim 7
Dependent Claim
88 words
Apparatus according to claim 2 wherein said field stores (4,5,6) comprise a first field store (4), a second field store (5) and a third field store (6), and wherein in fast motion reproduction modes of said video tape recorder (2) said digital television signal is read from said first and second field stores (4,5) while being written into said third field store (6), and is then read from said second and third field stores (5,6) while being written into said first field store (4), this sequence continuing cyclically.
Claim 8
Dependent Claim
21 words
Apparatus according to any one of the preceding claims wherein vertical parity correction is effected in said field store arrangement (1).
Claim 9
Dependent Claim
22 words
Apparatus according to any one of the preceding claims wherein time-base correction is effected on read-out from said field store arrangement (1).
Claim 10
Dependent Claim
21 words
Apparatus according to any one of the preceding claims wherein de-shuffling is effected on read-out from said field store arrangement (1).
Claim 11
Dependent Claim
21 words
Apparatus according to any one of the preceding claims wherein concealment is effected on read-out from said field store arrangement (1).
Claim 12
Dependent Claim
22 words
Apparatus according to claim 1 wherein said field store arrangement (1) comprises more than three field stores (34, 35, 36, 37, etc.).
Claim 13
Dependent Claim
113 words
Digital television apparatus comprising: a field store arrangement (1) comprising first and second field stores (24,25) each capable of storing digital signals relating to one field of a television signal; means (2) to supply a digital television signal at a variable rate to said field store arrangement (1); means (7) to supply said digital television signal to either of said field stores (24,25) for writing therein; means (8) to read said stored digital television signal from either of said field stores (24,25); neither said field store (24,25) being written into at the same time that it is read from; and means (7) to alternate said writing and reading between said field stores (24,25).
Claim 14
Dependent Claim
113 words
Digital television apparatus comprising: a field store arrangement (1) comprising first and second field stores (24,25) each capable of storing digital signals relating to one field of a television signal; means (2) to supply a digital television signal at a variable rate to said field store arrangement (1); means (7) to supply said digital television signal to either of said field stores (24,25) for writing therein; means (8) to read said stored digital television signal from either of said field stores (24,25); neither said field store (24,25) being written into at the same time that it is read from; and means (7) to alternate said writing and reading between said field stores (24,25).
References Cited (Backward Citations)
No citation records indexed.
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