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EP0475275A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Arrangement for processing teletext information

Assignee: Texas Instruments Deutschland GmbH
•
Filing: 1991-09-05
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Granted: —
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Expires: 2011-09-05
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Abstract

Abstract An arrangement is described for processing teletext information which makes it possible practically without any delay to reproduce the information pages transmitted by television transmitters on the screen of a television set, the updated state of the reproduced pages being ensured. The arrangement includes a buffer (44) for the data signals corresponding in each case to an information page. Furthermore, it includes a microprocessor (32) which receives the buffered data signals and within the period required for the transmission of an information page stores them in a main memory (24) for all information pages. In dependence upon a page request signal entered by a user a control unit (26) generates a control command for the microprocessor (32) which causes the latter to fetch from the main memory (24) the page requested by the page request signal and supply it to an image processor (42) which generates from the data signals the signals necessary for the reproduction on the screen.

Inventors

  • 👤 Helmut Fink
  • 👤 Trevor C. Jones
  • 👤 Colin Hinson

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 21:38
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N7/087; H04N7/088; H04N7/0882

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 212 words
Arrangement for processing teletext information received together with a video signal by a television receiver, the teletext information consisting of S information pages which are transmitted at least once within a transmission cycle and are representable as required on the screen of the television receiver and each have a predetermined number N of lines, of which a subamount n is transmitted with each field of the video signal, comprising a separating unit for separating the teletext information from the video signal and a converter for converting data signals corresponding to an information page to a data format suitable for reproduction on the screen of the television receiver, characterized by a buffer (46) for the data signals corresponding in each case to an information page, a microprocessor (32) which receives the buffered data signals and within the period required for transmitting an information page stores them in a main memory (24) for the S information pages, and a control unit (26) which in dependence upon a page request signal entered by a user generates a control command for the microprocessor (32) which causes the latter to fetch the data signals corresponding to the page requested by the page request signal from the main memory (24) and supply them to the image processor (42).
Claim 2
Dependent Claim 53 words
Arrangement according to claim 1, characterized in that the buffer (46) is a region of the main memory (24), that a region (52) of the main memory (24) contains information on the addresses of the stored information pages and that the microprocessor (32) updates the address region (52) on storing the information pages.

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