Method and apparatus for processing identification signals
First Claim
1. A method for processing identification signals present in a data signal providing at least one teletext page which can be displayed as a television picture on a television display, said data signal comprising a plurality of signal sequences which are assigned respective associated character positions on said television picture, said method comprising the steps of:
- (a) searching said teletext page character position by character position and identifying at least one group of three successive signal sequences each representing a digit and each group being directly preceded and followed by signal sequences not representing a digit, each group of sequences representing a three digit natural number; and
(b) storing a first identification signal assigned to said teletext page and representing said group of signal sequences.
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Accused Products
Abstract
A method and apparatus for processing identification signals in a data signal (teletext signal) which is cyclically repeated within a television signal and which can be displayed in the form of single still television pictures (teletext pages), whereby the manual entry of numbers for selecting the teletext pages is superfluous and the desired teletext pages can be selected in a simple and flawless way by searching a part of the teletext signal constituting at least a part of the contents of a selected teletext page for signal sequences representing three-digit, natural numbers, which sequences are separated as identification signals and are stored as signals assigned to the selected teletext page.
28 Citations
34 Claims
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1. A method for processing identification signals present in a data signal providing at least one teletext page which can be displayed as a television picture on a television display, said data signal comprising a plurality of signal sequences which are assigned respective associated character positions on said television picture, said method comprising the steps of:
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(a) searching said teletext page character position by character position and identifying at least one group of three successive signal sequences each representing a digit and each group being directly preceded and followed by signal sequences not representing a digit, each group of sequences representing a three digit natural number; and (b) storing a first identification signal assigned to said teletext page and representing said group of signal sequences. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A circuit for processing identification signals present in a data signal providing at least one teletext page which can be displayed as a television picture on a television display, said data signal comprising a plurality of signal sequences which are assigned respective associated character positions on said television picture, said circuit comprising:
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(a) means for searching said teletext page character position by character position for identifying at least one group of signal sequences each representing a digit and each group being directly preceded and followed by signal sequences not representing a digit;
each group of sequences representing a three digit natural number; and(b) means coupled to said searching means for storing a first identification signal assigned to said teletext page and representing said group of signal sequences.
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Specification