EP0276985A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Video processing
Assignee: OFFERTA DI LICENZA AL PUBBLICO;AL PUBBLICO
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Filing: 1988-01-26
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Granted: —
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Expires: 2008-01-26
Abstract
Abstract A television receiver has equipment to provide a normal aspect-ratio display from a wide aspect-ratio format signal as broadcast. With the pan vector A set to the start of the store, the signal is read into line stores RA, GA, BA using clock 1 while line stores RG, GB, BB are being read using pan vector B as start address and clock 3 as the output clock. Clock 2 is selected as an output clock if the aspect-ratio information does not indicate a wide aspect-ratio transmission. The line stores are switched at half line rate so that stores RA, GA, BA are now read out, while RB, GB, BB are rewritten. Pan vector is now set to the start of the RAM/FIFO of the line start and pan vector A is set for the start of the expansion period. The sequence is again switched back on following alternate lines.
Inventors
- 👤 David William Walton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 03:21
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0117; H04N7/0122; H04N11/00; H04N11/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
63 words
A television receiver comprising circuitry which comprises means to decode a transmitted video signal, means to effect aspect-ratio processing on the transmitted video signals such as to provide a display with an aspect-ratio different to that of the video signal in the format as transmitted, the aspect-ratio processing means being responsive to a section in the transmitted video signals for containing aspect-ratio data.
Claim 2
Dependent Claim
63 words
A television receiver comprising circuitry which comprises means to decode a transmitted video signal, means to effect aspect-ratio processing on the transmitted video signals such as to provide a display with an aspect-ratio different to that of the video signal in the format as transmitted, the aspect-ratio processing means being responsive to a section in the transmitted video signals for containing aspect-ratio data.
Claim 3
Dependent Claim
43 words
A television receiver according to Claim 1, comprising means to handle a video signal whereby in that part of the video signal corresponding to a picture as transmitted, the aspect-ratio data section indicates that portion of the picture which is to be displayed.
Claim 4
Dependent Claim
39 words
A television receiver according to Claim 2, comprising means to handle a video signal whereby the aspect-ratio data section indicates that portion, for display, of a predetermined number, or a number specified in the video signal, of adjacent pictures.
Claim 5
Dependent Claim
43 words
A television receiver according to any one of Claims 1 to 3, comprising means to effect the display of a predetermined portion of the picture when the processing means is effecting no other form of selective display of the video signal as transmitted.
Claim 6
Dependent Claim
19 words
A television receiver according to any one of the preceding Claims, wherein the circuitry is in integrated circuit format.
Claim 7
Dependent Claim
29 words
A television receiver according to any one of the preceding Claims, wherein the aspect-ratio processing means is incorporated in an integrated circuit which is separate from the decoding means.
Claim 8
Dependent Claim
26 words
A television receiver according to any one of the preceding claims, comprising externally generated clocking means and means to effect line locking of the clocking means.
Claim 9
Dependent Claim
61 words
An aspect-ratio conversion unit for use with a television receiver, the unit comprising means to effect aspect-ratio processing on transmitted video signals such as to provide a display with an aspect-ratio different to that of the video signal in the format as transmitted, the aspect-ratio processing means being responsive to a section in the transmitted video signals for containing aspect-ratio data.
Claim 10
Dependent Claim
61 words
An aspect-ratio conversion unit for use with a television receiver, the unit comprising means to effect aspect-ratio processing on transmitted video signals such as to provide a display with an aspect-ratio different to that of the video signal in the format as transmitted, the aspect-ratio processing means being responsive to a section in the transmitted video signals for containing aspect-ratio data.
Claim 11
Dependent Claim
42 words
A unit according to Claim 7 comprising means to handle a video signal whereby, in that part of the video signal corresponding to a picture as transmitted, the aspect-ratio data section indicates that portion of the picture which is to be displayed.
Claim 12
Independent Claim
63 words
A method of providing a television display, the method comprising decoding a transmitted video signal, effecting aspect-ratio processing on the transmitted video signals such as to provide a display with an aspect-ratio different to that of the video signal in the format as transmitted, the aspect-ratio processing stage comprising being responsive to a section in the transmitted video signals for containing aspect-ratio data.
Claim 13
Independent Claim
63 words
A method of providing a television display, the method comprising decoding a transmitted video signal, effecting aspect-ratio processing on the transmitted video signals such as to provide a display with an aspect-ratio different to that of the video signal in the format as transmitted, the aspect-ratio processing stage comprising being responsive to a section in the transmitted video signals for containing aspect-ratio data.
References Cited (Backward Citations)
No citation records indexed.
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