EP0153820A2
Expired / Lapsed
EP
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Digital television signal processing apparatus
Assignee: Sony Corp
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Filing: 1985-02-05
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Granted: —
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Expires: 2005-02-05
Abstract
Abstract Digital television signal processing apparatus comprise 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, a digital video tape recorder (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 at least one 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 (9) to read the stored television signal from at least one 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. Each of the field stores (4, 5, 6) is formed by a plurality, for example four, of field store units (4A etc.) and respective said field store units (4A, etc.) of each of the field stores (4, 5, 6) are grouped together to receive the digital television signal via a common input.
Inventors
- 👤 Mark Christopher Collins
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 11:35
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/937; H04N5/917; H04N5/919
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
209 words
Digital television signal processing 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); write control means (7) to supply said digital television signal to at least one of said field stores (4, 5, 6) for writing therein, depending on said rate of supply of said digital television signal; read control means (9) to read said stored digital television signal from at least one of said field stores (4, 5, 6), depending on said rate of supply of said digital 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; characterised in that: each of said field stores (4, 5, 6) is formed of a plurality of field store units (4A, etc.) and respective said field store units (4A, etc) of each of said field stores (4, 5, 6) are grouped together to receive said digital television signal via a common input.
Claim 2
Dependent Claim
209 words
Digital television signal processing 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); write control means (7) to supply said digital television signal to at least one of said field stores (4, 5, 6) for writing therein, depending on said rate of supply of said digital television signal; read control means (9) to read said stored digital television signal from at least one of said field stores (4, 5, 6), depending on said rate of supply of said digital 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; characterised in that: each of said field stores (4, 5, 6) is formed of a plurality of field store units (4A, etc.) and respective said field store units (4A, etc) of each of said field stores (4, 5, 6) are grouped together to receive said digital television signal via a common input.
Claim 3
Dependent Claim
26 words
Apparatus according to claim 1 wherein each of said field stores (4, 5, 6) is formed by four field store units (4A, 4B, 4C, 4D, etc).
Claim 4
Dependent Claim
27 words
Apparatus according to claim 1 or claim 2 wherein a single read address generator (25) generates read address signals for all said field stores (4, 5, 6).
Claim 5
Dependent Claim
86 words
Apparatus according to claim 1, claim 2 or claim 3 wherein said means (2) to supply said digital television signal is a digitals-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 (3).
Claim 6
Dependent Claim
61 words
Apparatus according to claim 4 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 field store (5), and is then read from said second field store (5) while being written into said third field store (6), this sequence continuing cyclically.
Claim 7
Dependent Claim
79 words
Apparatus according to claim 4 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 8
Dependent Claim
61 words
Apparatus according to claim 4 wherein in fast motion reproduction modes of said video tape recorder (2) said digital television signals is read from said first field store (4) while being written into said second field store (5), and is then read from said second field store (5) while being written into said third field store (6), this sequence continuing cyclically.
Claim 9
Dependent Claim
45 words
Apparatus according to any one of the preceding claims wherein an error correction device (27A, etc.) is provided subsequent to said field store arrangement (1) to effect error correction of data words of said digital i television signal read from said field store arrangement (1).
Claim 10
Dependent Claim
38 words
Apparatus according to claim 8 wherein an error concealment device (28) is provided subsequent to said error correction device (27A, etc.), to effect concealment of error data words which are not correctable by said error correction device .
Claim 11
Dependent Claim
21 words
1). Apparatus according, to any one of the preceding claims wherein y shuffling is effected in said field store arrangement (1).
Claim 12
Dependent Claim
23 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).
References Cited (Backward Citations)
No citation records indexed.
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