Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
  • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
  • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
  • H04N7/0882—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of character code signals, e.g. for teletext
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
  • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
  • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
  • H04N7/0884—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of additional display-information, e.g. menu for programme or channel selection
  • H04N7/0885—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of additional display-information, e.g. menu for programme or channel selection for the transmission of subtitles

Definitions

• System for displaying teletext information and television or NCR apparatus comprising such a system.
• the invention relates to a system for displaying teletext information, comprising a video decoder for providing video information, a teletext decoder for providing teletext information, a display for reproducing video information or teletext information, and a control unit for controlling the information to be reproduced by the display, and to a television or NCR apparatus comprising such a system.
• US-A-3 891 792 discloses a television character crawl display method and apparatus allowing a viewer to superimpose character information on a normal video program. In this manner a viewer can watch the video program and character information . simultaneously.
• this known apparatus there is provided digital logic circuitry to extract the character signal from the video signal, wherein a video data mixer reinsert the character signal into the video channel. The character signal is transmitted during successive vertical blanking intervals of the television image signal.
• the known apparatus shows the disadvantage that the viewer can only switch on or off the display of the character information on the display screen, wherein the complete message will be displayed if the character information display is switched on.
• the invention aims to provide an improved system of the above-mentioned type, wherein the above-mentioned disadvantages are overcome.
• control unit is programmed to allow a user to select teletext information for reproduction by the display as a teletext information bar in a video image reproduced from the video information.
• teletext information can be displayed substantially without obstructing the normal video program reproduced simultaneously with the teletext information bar.
• the teletext decoder is advantageously used to allow the user to select any teletext information for reproduction by the display in the information bar. In this manner a very flexible system for displaying teletext information in a normal video image is obtained.
• a tuner 1 receives an antenna or cable signal at an input 2 and provides an output signal to a video decoder 3 and a teletext decoder 4.
• the video decoder 3 provides video information in RGB format at an output 5, which video information is suitable for reproduction by a display device 6.
• the teletext decoder 4 provides teletext information in RGB format at an output 7 also suitable for reproduction by the display 6. Both outputs 5 and 7 are connected to a device 8 having an output connected to the display 6.
• the system further comprises a control unit 9 which is made as a ⁇ programmable device. It is noted that in practice the control unit 9 and teletext decoder 4 can be made as a single-chip micro-controller with integrated teletext decoder.
• the control unit 9 can be controlled by means of a remote control 10 which can be operated by a user. In a conventional manner, the user can operate the remote control 10 to watch a normal video program or teletext information by switching on teletext. In this case the complete screen of display 6 is occupied by teletext display.
• the control unit 9 may be programmed in such a manner that a mixed mode is possible, in which case teletext information is displayed mixed with the video program. However in such a mixed mode, watching a normal video program is not convenient.
• the teletext decoder 4 can acquire teletext data in the background while the user is watching a normal video program.
• This teletext data is processed by the control unit in accordance with control commands provided by the viewer and is then displayed in an information bar 11 schematically shown on the display 6.
• the area occupied by this information bar 11 is such that the normal video program image is substantially unobstructed.
• each teletext page is uniquely identified by 7 numbers, i.e. page magazine, page tens, page units, hours tens, hours units, hours tens, hours units, minutes tens and minutes units.
• the user may select the desired pages for reproduction in the information bar 11 by entering this information through a menu control, i.e. a suitable graphic user interface. Programming such user interfaces is well-known to the person skilled in the art and is not further described.
• the remote control 10 can be provided with a suitable select button 12 which may be pressed by the user when the user is viewing the desired teletext page.
• the user may want to further specify which text from the selected teletext page or pages should be displayed in the information bar 11. For example the user may only be interested in arrival/departure information of specific flights, prices of specific shares, etc.
• the control unit 9 can be programmed such that the user may select text of a teletext page for display, for example by selecting a region of the teletext page by means of a cursor operated by the arrow keys of the remote control 10.
• the control unit 9 can be programmed to allow the user to enter certain keywords telling the control unit to display all lines of text of the teletext page with such keywords.
• text selection can also be based on text colour.
• teletext systems may comprise multi-paged text pages.
• the selected text regions may be given an order for display in the information bar 11.
• the teletext information is displayed in the information bar 11 in a scrolling manner.
• the control unit 9 is programmed to allow the user to choose between several display options.
• the selected text is continuously displayed in the information bar 11 in a scrolling manner.
• the user may select a periodical display of the selected text during a predetermined duration and as a third option the user may choose to display the selected text only in case the teletext page has been updated.
• the selected text is displayed during a predetermined duration.
• the duration to display the selected text may be controlled by the user through the remote control 10.
• the user can watch a normal video program completely unobstructed by the information bar 11 as long as there is no new information to read. As soon as new information arrives, the selected text will be displayed in the information bar 11 for the desired duration.
• the scrolling speed can be varied by the user through the remote control 10.
• the user may pause the scrolling of the selected text on every new line.
• the information bar 11 is displayed at the bottom of the display 6 as shown in the drawing.
• the control unit 9 is programmed to allow the user to move the information bar 11 by means of the conventional arrow keys of the remote control 10.
• control unit 9 is programmed to allow the user to change the colour of the text and/or background displayed in the information bar 11.
• a system for displaying teletext > information allowing a user to select teletext information to be displayed in an information bar displayed in the normal video program.
• the system comprises a video decoder for providing video information, a teletext decoder for providing teletext information and a display for reproducing video information or teletext information.
• a control unit for controlling the information to be reproduced by the display is also provided and this control unit is programmed to allow a user to select teletext information for reproduction by the display as a teletext information bar in a video image reproduced from the video information. In this manner teletext information can be displayed substantially without obstructing the normal video program reproduced simultaneously with the teletext information bar.
• the teletext decoder is advantageously used to allow the user to select any teletext information for reproduction by the display in the information bar in various manners as described above.
• the system is highly flexible in selecting teletext information to be displayed.
• the invention is not restricted to the above described embodiment which can umber of ways within the scope of the attached claims.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Human Computer Interaction (AREA)
• Television Systems (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=20430591

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (8)

• 2000
  • 2000-05-20 SG SG200002764A patent/SG114461A1/en unknown
• 2001
  • 2001-04-25 WO PCT/EP2001/004675 patent/WO2001091456A1/en not_active Application Discontinuation
  • 2001-04-25 EP EP01933886A patent/EP1290875A1/de not_active Withdrawn
  • 2001-04-25 JP JP2001586915A patent/JP2003534735A/ja active Pending

Non-Patent Citations (1)

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