EP0113934A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Television transmission system
Assignee: Philips Electronics UK Ltd
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Filing: 1983-12-15
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Granted: —
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Expires: 2003-12-15
Abstract
Abstract In a wide picture format television transmission system the signals for the scene (1,2,3,4) are transmitted as first and second television signals. The first television signal contains signal information relating to a portion (1, 5, 2, 6) of the scene of standard aspect ratio whilst the second television signal contains signal information relating to the remaining portions (1, 2, 3, 5 and 1, 6, 3, 4) of the scene. The first television signal can be compatible with television signals currently broadcast. In order to enable the first television signal to relate to the area of main interest of the scene it may be derived from a moveable portion between extreme portions (1,2,3,7 to 1, 8, 3, 4) of the scene. In order to correctly combine the information from the first and second television signals at a receiver for a correct wide picture format display the second television signal additionally comprises a component in the form of a steering pulse.
Inventors
- 👤 Bernard Victor Cole
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 18:43
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/24; H04N11/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
210 words
A television transmission system for the simultaneous transmission of television signals from the same scene for standard and wide picture formats of respectively a standard aspect ratio and a wider than standard aspect ratio with both picture formats having the same height, in which a first television signal containing information for the production of a display with the standard picture format is transmitted by way of a first transmission path whilst a second television signal containing the additional information required to be added to that of said first television signal for the production of a display with the wide picture format is transmitted by way of a second transmission path, characterised in that said first and second television signals are both derived from signal information relating to the full width of the scene, the information contained in the first television signal relating to a moveable selected portion of said scene whilst that contained in the second television signal relates to the remaining portion or portions of said scene, said second television signal additionally comprising a component for indicating the correct position of the information contained in the second television signal in relation to that of the first television signal on the production of a display of the wide picture format.
Claim 2
Dependent Claim
210 words
A television transmission system for the simultaneous transmission of television signals from the same scene for standard and wide picture formats of respectively a standard aspect ratio and a wider than standard aspect ratio with both picture formats having the same height, in which a first television signal containing information for the production of a display with the standard picture format is transmitted by way of a first transmission path whilst a second television signal containing the additional information required to be added to that of said first television signal for the production of a display with the wide picture format is transmitted by way of a second transmission path, characterised in that said first and second television signals are both derived from signal information relating to the full width of the scene, the information contained in the first television signal relating to a moveable selected portion of said scene whilst that contained in the second television signal relates to the remaining portion or portions of said scene, said second television signal additionally comprising a component for indicating the correct position of the information contained in the second television signal in relation to that of the first television signal on the production of a display of the wide picture format.
Claim 3
Dependent Claim
39 words
A transmission system as claimed in claim 1, characterised in that said component comprises a pulse located in the video signal of said second television signal, the position of said pulse in said video signal providing the said indication.
Claim 4
Dependent Claim
36 words
A transmission system as claimed in Claim 2 in which said second television signal contains a synchronising signal, characterised in that said pulse has an amplitude which is less than half that of said synchronising signal.
Claim 5
Dependent Claim
29 words
A transmission system as claimed in Claim 1, characterised in that said component comprises a pulse or pulses transmitted during the field blanking period of said second television signal.
Claim 6
Dependent Claim
155 words
Television transmission equipment for use with the television transmission system as claimed in any one of the preceding claims comprising means for generating said first television signal from a scene having said wider than standard aspect ratio, said first television signal representing a portion of said scene having said standard aspect ratio, means for applying said first television signal to said first transmission path, means for generating said second television signal from said scene, said second television signal representing the information in said scene outside the portion of standard aspect ratio, means for applying said second television signal to said second transmission, characterised in that said equipment additionally comprises means for selecting said first television signal from a moveable portion of said scene within the width of said scene, and means for adding a component to said second television signal which component indicates the relative position of said moveable,portion contained in said first television signal.
Claim 7
Dependent Claim
44 words
Transmission equipment as claimed in Claim 5, characterised in that the position of said moveable portion is determined by a steering control under the control of an operator, said steering control also determining the generation of said component added to said second television signal.
Claim 8
Dependent Claim
46 words
Transmission equipment as claimed in Claim 6, characterised in that said component comprises a steering pulse located in the video signal of said second television signal, the position of said pulse in said video signal providing the said indication and being determined by said steering control.
Claim 9
Dependent Claim
39 words
Transmission equipment as claimed in Claim 6, characterised in that said component comprises a pulse or pulses located in the field blanking period of said second television signal which provides the said indication as determined by said steering control.
Claim 10
Dependent Claim
42 words
Transmission equipment as claimed in Claim 7, or 8, in which a pulse generator provides the synchronising signal present in said second television signal, characterised in that said pulse generator also provides the steering pulse or pulses for said second television signal.
Claim 11
Dependent Claim
134 words
Television reception equipment for use with the television transmission system as claimed in Claim 1, 2, 3 or 4 comprising a first input terminal for receiving said first television signal present in said first transmission path, a second input terminal for receiving said second television signal present in said second transmission path, means for combining the video information contained in said first and second television signals for producing a wide picture format display representing the full width of said scene from which said first and second television signals are derived, characterised in that said equipment additionally comprises means responsive to said component present in said second television signal for combining the video information contained in said first and second television signals with the correct relationship for the production of said wide picture format display.
Claim 12
Dependent Claim
79 words
Reception equipment as claimed in Claim 10, additionally comprising a pulse generator responsive to synchronising signals present in said first and/or second television signals, characterised . in that said pulse generator is also responsive to a steering pulse forming said component in said second television signal, said pulse generator producing control pulses required for controlling the correct combining of the said video information in said first and second television signals for the production of said wide picture format display.
References Cited (Backward Citations)
No citation records indexed.
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