GB2242594A - Television receiver with additional display of characters - Google Patents
Television receiver with additional display of characters Download PDFInfo
- Publication number
- GB2242594A GB2242594A GB9106553A GB9106553A GB2242594A GB 2242594 A GB2242594 A GB 2242594A GB 9106553 A GB9106553 A GB 9106553A GB 9106553 A GB9106553 A GB 9106553A GB 2242594 A GB2242594 A GB 2242594A
- Authority
- GB
- United Kingdom
- Prior art keywords
- box
- receiver according
- picture
- characters
- path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
- H04N21/4316—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
Description
- ----Z7- = CSEJ '_'I TELEVISION RECEIVER WITH ADDITIONAL DISPLAY OF
CHARACTERS The invention relates to a television receiver with additional display of characters within a box wherein the normal picture is displayed also within said box.
According to prior art a television receiver displaying a normal picture on the screen of the picture tube includes means for additionally displaying characters on a part of the screen within the normal picture. Said characters may include an explanation of the normal picture just displayed. They may include any news or special hints for the controlling or tuning or adjusting of the receiver.
The characters in form of symbols, letters or numbers may be merely inserted into the picture so that only the characters themselves occupy a part of the picture area. In other cases a so-called box is provided within the picture area and the characters appear within said box. The box forming a background for the characters may be displayed in black or any other colour.
If the characters are located within a box having a background with uniform colour a good visibility of the characters is achieved as the characters within the box are not surrounded by the normal picture. On the other hand a part of the normal picture is lost and cannot be r'e-'"r-ded. This is a disadvantage especially in cases where the box occupies a relative large area of the picture.
Another solution consists of displaying the normal picture also within the box. In this case the normal picture can be seen within the area occupied by the box except the small areas of the characters. However, in this case it becomes difficult to read the characters as they are surrounded by the normal picture. Said two demands for display of nearly the full picture also in the box on the one hand and a good visibility of the characters on the other hand therefore seem to be contrary and not possible simultaneously.
It is an object of the invention to modify the receiver in such a way that said two requirements for display of the 1 full picture and good visibility of the characters are achieved simultaneously.
According to the invention means are provided for reducing the contrast of the picture within the box in relation to the contrast outside the box.
It was found that at reduced contrast the picture within the box is still discernible. On the other hand the reduced contrast within the box permits a good visibility of the characters which is not disturbed by the picture forming the background within the box.
According to one embodyment of the invention the amplification of the picture signal fed to the picture tube is reduced during display of the box. Likewise it is possible to amplitude limit said picture signal at a predetermined threshold, that means to clip the signal. In another form there is used a combination of said two methods that means reducing the amplification above a predetermined threshold.
Said means for handling the signal may be arranged within the path of the RGB-signals, within the path of the composite video signal (MBS) or within the path of the luminance signal and/or within the path of the demodulated colour difference signals or color component signals. The solution used depends upon the circuitry used in the television receiver.
Preferably the means for reducing the contrast are adjustable in order to adapt said reduction to the special requirements or individual impressions of the viewer.
In order that the invention may more readily be understood, a description is now given by way of example only, reference being made to the accompanying drawing. Within the drawing
Fig. 1 shows the screen together with the box and the characters, Fig. 2 shows a circuit diagram of the invention and 1 c 1 Fig. 3,4,5 show different characteristics of the circuit shown in Fig. 2.
Fig. 1 shows a picture screen 1 on which a normal picture 2 is displayed. Within the picture 2 a box 3 of rectangular form is digplayed. Within the box 3 characters 4 are displayed including additional informations for the viewer. The normal picture 2 is also displayed within the area of box 3 except the small areas of the characters 4. The picture 2 outside the box 3 as well as the characters 4 are not modified compared with prior art. However, the contrast of the normal picture 2 within the box 3 is reduced with respect to the contrast of the picture 2 outside the box. Therefore, the picture 2 can also be regarded within the area of box 3 whereas the readibility of the characters 4 is not decreased.
Fig. 2 shows the circuit for producing a signal for a display according to Fig. 1. During normal picture 2 outside the box 3 the video signal is fed from terminal 5 via lead 6, switch S1 in the shown position and switch S2 in the shown position to output terminal 7. During this interval the video signal is not modified by the circuit shown.
Within box 3, that means during several lines or during special parts of several lines the switch S1 is switched to the lower position by pulse 10. Now the video signal from terminal 5 is fed via circuit 11 which reduces the contrast of said signal. Instead of original video signal at terminal 5 now the signal Vo with reduced contrast is fed via S1 and S2 in the lower position to terminal 7 for display on the screen of the tube.
During the characters 4 within box 3 switch S2 is switched by pulse 12 to the upper position. Now the video signal from terminal 5 is completely switched off and replaced by the text signal from terminal 13 representing characters 4.
Fig. 3,4,5 show different p5ssible characteristics of circuit 11.
According to Fig. 3 the signal path represented by lead 6 normally has an amplification according to curve 13. The circuit 11, however, has an amplification according to curve 14, so that the amplitude of the signal Vo compared with the signal Vi is reduced thusreducing the contrast within box 3.
In Fig. 4 the amplification of the signal is not changed below-a threshold value Vos. Above Vos however the signal Vi is amplitude limited or clipped so that the amplitude of Vo used for display during box 3 is limited at a value Vos.
Fig. 5 shows the combination of the solutions according to Fig. 3,4. Up to Vos amplification is unchanged whereas above Vos the signal is not amplitude limited but provided with a lower amplification factor represented by the different lines shown.
The modification of signal Vi within circuit 11 may be adjustable to different values of amplification or to different threshold values shown in Fig. 4,5 as illustrated by the symbols within circuit 11. Circuit 11 can be implemented by analogue or digital means or a combination of analogue and digital means. This adjustment can be made by a remote control unit, or be preset or be fixed.
These conditions can be set up by physical components or by digital means.
Digital means can include read only memory, non-volatile memory or readwrite memory.
The storage associated with digital means may be external to circuit 11.
i . 1 1 1
Claims (10)
- S $ It 1. Television receiver with additional display of characters within a box on the screen wherein the normal picture is displayed also within said box, characterized by means for reducing the contrast of the picture within the box in relation to the contrast outside the box.
- 2. Receiver according to claim 1, characterized by means for reducing the amplification of the picture signal during display of the-box.
- 3. Receiver according to claim 1, characterized by means for amplitude limiting the picture signal at a predetermined threshold.
- 4. Receiver according to claim 1, charactreized by means for reducing the amplification of the picture signal only above a predetermined threshold.
- 5. Receiver according to any one of predeeding claims, characterized in that said means are arranged within the paths of the RGB signals.
- 6. Receiver according to any one of preceeding claims, characterized in that said means are arranged within the path of the composite video signal.
- 7. Receiver according to any one of preceeding claims, characterized in that said means are arranged within the path of the luminance signal.
- 8. Receiver according to any one of preceeding claims, characterized in that said means are arranged within the path of the demodulated colour difference signals.
- 9. Receiver according to any one of preceding claims, characterized in that said means are arranged within the path of the demodulated colour component signals.
- 10. Receiver according to claim 1, characterized in that said means being adjustable for individually varying the contrast of the picture within the box.Television receiver as described within the description k and the drawing.i i i 1 1 Pubiished 1991 at The Patent Office Concept House. CardiffR(,ad Gwent NP9 IRH Further copies may be obtained frorn Sales Branch. Unit 6. Nine Mile Point. Cii-mfelinfach. Cross Keys. Newport. NPI 7HZ. Printed by.Multiplex techniques ltd. St Mary Cray. Kent.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB909006776A GB9006776D0 (en) | 1990-03-27 | 1990-03-27 | Television receiver with additional display of characters |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9106553D0 GB9106553D0 (en) | 1991-05-15 |
GB2242594A true GB2242594A (en) | 1991-10-02 |
Family
ID=10673301
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB909006776A Pending GB9006776D0 (en) | 1990-03-27 | 1990-03-27 | Television receiver with additional display of characters |
GB9106553A Withdrawn GB2242594A (en) | 1990-03-27 | 1991-03-27 | Television receiver with additional display of characters |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB909006776A Pending GB9006776D0 (en) | 1990-03-27 | 1990-03-27 | Television receiver with additional display of characters |
Country Status (10)
Country | Link |
---|---|
US (1) | US5481318A (en) |
EP (1) | EP0449106B1 (en) |
JP (1) | JP3105278B2 (en) |
KR (1) | KR100266851B1 (en) |
CN (1) | CN1044842C (en) |
DE (1) | DE69123771T2 (en) |
ES (1) | ES2108695T3 (en) |
GB (2) | GB9006776D0 (en) |
HK (1) | HK134997A (en) |
MY (1) | MY115268A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995001051A1 (en) * | 1993-06-18 | 1995-01-05 | Philips Electronics N.V. | Television receiver |
US6532041B1 (en) * | 1995-09-29 | 2003-03-11 | Matsushita Electric Industrial Co., Ltd. | Television receiver for teletext |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9201837D0 (en) * | 1992-01-27 | 1992-03-11 | Philips Electronic Associated | Television receiver |
US5327176A (en) * | 1993-03-01 | 1994-07-05 | Thomson Consumer Electronics, Inc. | Automatic display of closed caption information during audio muting |
FR2702619B1 (en) * | 1993-03-12 | 1995-04-28 | Thomson Consumer Electronics | Character display device in a video system. |
DE4343951A1 (en) * | 1993-12-22 | 1995-06-29 | Inst Rundfunktechnik Gmbh | Method for receiving teletext data transmitted in a television signal |
US5502504A (en) † | 1994-04-28 | 1996-03-26 | Prevue Networks, Inc. | Video mix program guide |
JP3286088B2 (en) * | 1994-08-29 | 2002-05-27 | 株式会社東芝 | Television receiver |
KR0157559B1 (en) * | 1995-07-31 | 1998-11-16 | 김광호 | Image signal brightness controlling apparatus in the osd domain |
JPH09135403A (en) | 1995-11-09 | 1997-05-20 | Sony Corp | Image display device |
FR2747000B1 (en) * | 1996-03-26 | 1998-06-19 | Sgs Thomson Microelectronics | VIDEO PREAMPLIFIER WITH DATA INSERTION |
US5973734A (en) | 1997-07-09 | 1999-10-26 | Flashpoint Technology, Inc. | Method and apparatus for correcting aspect ratio in a camera graphical user interface |
CN1078034C (en) * | 1998-01-26 | 2002-01-16 | 四川长虹电子集团公司 | Method of displaying specific characters or image on TV screen |
US6317141B1 (en) | 1998-12-31 | 2001-11-13 | Flashpoint Technology, Inc. | Method and apparatus for editing heterogeneous media objects in a digital imaging device |
NO325034B1 (en) * | 2006-05-19 | 2008-01-21 | Terje H Houen | Mooring wire conveyor coil device |
US9224145B1 (en) | 2006-08-30 | 2015-12-29 | Qurio Holdings, Inc. | Venue based digital rights using capture device with digital watermarking capability |
EP1968311A1 (en) * | 2007-03-07 | 2008-09-10 | Telefonaktiebolaget LM Ericsson (publ) | Display controller,electronic apparatus and method for creating a translucency effect using color model transform |
CA3001474A1 (en) * | 2015-10-16 | 2017-04-20 | Tribune Broadcasting Company, Llc | Video-production system with metadata-based dve feature |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1554663A (en) * | 1975-06-06 | 1979-10-24 | Mitsubishi Electric Corp | Apparatus for reproducing multiplex video data |
GB2078049A (en) * | 1980-06-17 | 1981-12-23 | Emi Ltd | Display of visual information |
EP0108851A1 (en) * | 1982-11-11 | 1984-05-23 | Sharp Kabushiki Kaisha | Video display apparatus having an automatic brightness limiter |
EP0129648A2 (en) * | 1983-04-02 | 1985-01-02 | Deutsche Thomson-Brandt GmbH | Television receiver with text insertion |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4388639A (en) * | 1981-05-18 | 1983-06-14 | Zenith Radio Corporation | Color control circuit for teletext-type decoder |
JPS5875989A (en) * | 1981-10-30 | 1983-05-07 | Matsushita Electric Ind Co Ltd | Receiver for character broadcast |
JPS5891868A (en) * | 1981-11-24 | 1983-05-31 | 東洋紡績株式会社 | Production of acrylonitrile hollow fiber reverse osmosis membrane |
US4451840A (en) * | 1981-11-25 | 1984-05-29 | Rca Corporation | Picture control for television receiver on-screen display |
JPH0797660B2 (en) * | 1987-10-20 | 1995-10-18 | 三洋電機株式会社 | SiC blue light emitting diode |
JPH02260982A (en) * | 1989-03-31 | 1990-10-23 | Mitsubishi Electric Corp | Character/pattern storing reproducing device |
JPH0834563B2 (en) * | 1989-04-07 | 1996-03-29 | 三菱電機株式会社 | Character / pattern memory playback device |
US5031043A (en) * | 1990-03-05 | 1991-07-09 | The Grass Valley Group, Inc. | Video signal selection means for transmitting signal and key information over a signal channel |
JP3289892B2 (en) * | 1990-11-13 | 2002-06-10 | パイオニア株式会社 | Signal switching output device |
-
1990
- 1990-03-27 GB GB909006776A patent/GB9006776D0/en active Pending
-
1991
- 1991-03-21 DE DE69123771T patent/DE69123771T2/en not_active Expired - Fee Related
- 1991-03-21 ES ES91104404T patent/ES2108695T3/en not_active Expired - Lifetime
- 1991-03-21 EP EP91104404A patent/EP0449106B1/en not_active Expired - Lifetime
- 1991-03-25 KR KR1019910004653A patent/KR100266851B1/en not_active IP Right Cessation
- 1991-03-26 JP JP03061692A patent/JP3105278B2/en not_active Expired - Fee Related
- 1991-03-26 MY MYPI91000500A patent/MY115268A/en unknown
- 1991-03-27 GB GB9106553A patent/GB2242594A/en not_active Withdrawn
- 1991-03-27 CN CN91101906A patent/CN1044842C/en not_active Expired - Fee Related
-
1994
- 1994-11-23 US US08/344,796 patent/US5481318A/en not_active Expired - Fee Related
-
1997
- 1997-06-26 HK HK134997A patent/HK134997A/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1554663A (en) * | 1975-06-06 | 1979-10-24 | Mitsubishi Electric Corp | Apparatus for reproducing multiplex video data |
GB2078049A (en) * | 1980-06-17 | 1981-12-23 | Emi Ltd | Display of visual information |
EP0108851A1 (en) * | 1982-11-11 | 1984-05-23 | Sharp Kabushiki Kaisha | Video display apparatus having an automatic brightness limiter |
EP0129648A2 (en) * | 1983-04-02 | 1985-01-02 | Deutsche Thomson-Brandt GmbH | Television receiver with text insertion |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995001051A1 (en) * | 1993-06-18 | 1995-01-05 | Philips Electronics N.V. | Television receiver |
US5546131A (en) * | 1993-06-18 | 1996-08-13 | U.S. Philips Corporation | Television receiver having an arrangement for vertically shifting subtitles |
US6532041B1 (en) * | 1995-09-29 | 2003-03-11 | Matsushita Electric Industrial Co., Ltd. | Television receiver for teletext |
Also Published As
Publication number | Publication date |
---|---|
CN1044842C (en) | 1999-08-25 |
EP0449106B1 (en) | 1996-12-27 |
GB9006776D0 (en) | 1990-05-23 |
GB9106553D0 (en) | 1991-05-15 |
US5481318A (en) | 1996-01-02 |
EP0449106A2 (en) | 1991-10-02 |
DE69123771D1 (en) | 1997-02-06 |
KR910017863A (en) | 1991-11-05 |
MY115268A (en) | 2003-05-31 |
JP3105278B2 (en) | 2000-10-30 |
EP0449106A3 (en) | 1992-09-02 |
HK134997A (en) | 1998-02-27 |
KR100266851B1 (en) | 2000-09-15 |
CN1059059A (en) | 1992-02-26 |
ES2108695T3 (en) | 1998-01-01 |
DE69123771T2 (en) | 1997-07-10 |
JPH05130530A (en) | 1993-05-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |