Abstract Television receiver (1) has a remote control unit (5) to eneble a user to key in requests concerning the video display or the teletext facilities, signals being passed via i-r receiver (6) to command signal generator (7) which arranges them into a suitable format and then directs them to a video processing unit (8) and onto display (9) or to page-utilization monitor (4), as appropriate. Any teletext-related signals are processed by monitor (4), a page selector (10), a teletext decoder (11) and store (3) to ensure that a priority list of the most frequently-used pages is set up and maintained, and that the teletext information for these priority pages in the high-usage category are held in store (3) for fast and ready access.
A teletext unit characterised by means (11) to extract one or more selected pages of teletext data from a transmitted signal, means (4) to monitor the frequency of selection of individual teletext pages, and means (3) to store a number of pages of teletext data in accordance with the results of the monitoring means (4).
Claim 2
Dependent Claim
55 words
A teletext unit characterised by means (11) to extract one or more selected pages of teletext data from a transmitted signal, means (4) to monitor the frequency of selection of individual teletext pages, and means (3) to store a number of pages of teletext data in accordance with the results of the monitoring means (4).
Claim 3
Dependent Claim
37 words
A teletext unit according to Claim 1, characterised by means (3) to store a number of individual teletext data pages being those, determined by the monitor means, to be the most frequently selected over a predetermined period.
Claim 4
Dependent Claim
69 words
A teletext unit according to Claim 1 or Claim 2, characterised by the monitor means including: means (4) to note the identification code of a page upon its selection; means (4) to hold a record of the number of selections appropriate to at least some of the teletext pages; and means (4) to form a priority list of the teletext pages according to the information in the record-holding means.
Claim 5
Dependent Claim
35 words
A teletext unit according to any one of the preceding claims characterised by the monitor means (4) recording the frequency of use of each teletext page in relation to the first selection of that page.
Claim 6
Dependent Claim
74 words
A teletext unit according to any one of the preceding claims, characterised by means to subject the pages of information, line by line, to a compression technique constituting the removal of information corresponding to spaces within, or at the ends of, a line of teletext display, and/or to abbreviation when there occurs a sequence of identical characters, there being provision for indicating the nature of the repeated characters and the length of the sequence.
Claim 7
Dependent Claim
17 words
A television receiver characterised by a teletext unit according to any one of Claims 1 to 5.
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