GB1370535A - Transmission of alphanumeric data by television - Google Patents
Transmission of alphanumeric data by televisionInfo
- Publication number
- GB1370535A GB1370535A GB613672A GB613672A GB1370535A GB 1370535 A GB1370535 A GB 1370535A GB 613672 A GB613672 A GB 613672A GB 613672 A GB613672 A GB 613672A GB 1370535 A GB1370535 A GB 1370535A
- Authority
- GB
- United Kingdom
- Prior art keywords
- field
- character
- characters
- line
- message
- 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.)
- Expired
Links
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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
- G09G5/222—Control of the character-code memory
-
- 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
- H04N7/084—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 horizontal blanking interval only
- H04N7/085—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 horizontal blanking interval only the inserted signal being digital
-
- 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
Abstract
1370535 Television; multiplex pulse signalling BRITISH BROADCASTING COBP 9 May 1973 [9 Feb 1972 18 July 1972] 6136/72 and 33651/72 Headings H4F and H4L A message comprising alphanumeric characters is added in coded digital form to a television video signal for transmission in such a manner as not to interfere with the picture content of the video signal, and is extracted at the receiver for temporary storage, the stored digital signal then being decoded for use in the receiver display. Although the message may be modulated on a subcarrier in the audio channel, the particularly described embodiment uses time division multiplexing of character bits from several messages in lines occurring during the vertical blanking interval. One exemplified use of the system is the provision of subtitles for television display for use by deaf persons. The characters are arranged in 32 "pages", 768 characters per page, and 8 bits are used in coding the characters. In the standard 625 line format lines 13 and 14 in field 1 and lines 326, 327 in field 2 are used for carrying the coded messages in one of three organizations. If CnPr represents the nth character on the rth page then each line carries 32 characters and the three organizations are: Organization 1. Field 1; C 1 P 1 , C 1 P 2 , C 1 P 3 ... C 1 P 32 . Field 2; C 2 P 1 , C 2 P 2 , C 2 P 3 ... C 2 P 32 .... Field 768; C 768 P 1 ... C 768 P 32 . Organization 2. Field 1; C 1 P 1 , C 2 P 1 , C 3 P 1 ... C 32 P 1 . Field 2; C 33 P 1 ... C 64 P 1 ..... Field 24; C 737 P 1 ... C 768 P 1 . Field 25; C 1 P 2 .... Organization 3. Field 1; C 1 P 1 ... C 32 P 1 . Field 2; C 1 P 2 ... C 32 P 2 .... Field 32; C 1 P 32 ... C 32 P 32 . Field 33; C 33 P 1 ... C 64 P 1 .... Field 768; C 737 P 32 ... C 768 P 32 . To separate out the message date from the received signals, timing signals indicating the 13, 14, 326 and 327th line in a field are applied to a data separator 53, Fig. 2, receiving the combined video and message signals. 32 (pages) x 768 (characters) x 8 (bits) = 196,800 bits are thus extracted and stored in a series to parallel store 54. The parallel bit signals are fed via a page selector 55 to a decoder, "read only memory", character generator 56, the character being fed out as black or whiter than white modulations on seven successive lines of the display, each character being formed in a 7 by 5 matrix frame. The page selector may precede the store, so that the latter need only have capacity for one page-Fig. 3 (not shown). Random access stores can be used. In the embodiment of Figs. 4 and 5, a one line message of 32 characters, arranged according to the first organization, e.g. the characters occupy the fast position in 32 sucessive line 13's of 13 fields, are transmitted and received for use by the deaf. The message is fed on punched tape into a reader 10, each character code group (in ISO-7 code) being framed by a start group STX and in end group ETX. When the message is to be sent, a read signal on line 17 sets flip-flop 16 and another AND gate 15. A sync. pulse counter 11 determines the 13th line and enables gates 13 and 20. The signal from gate 13 is fed via gate 15 to cause the read out of the message in parallel form, into parallel/series register 19. It is then read-out at the correct time in series format by shift pulses provided by bit clock 22, counter 23 and decoder 24, and travels via gate 20 for combination with the video signal. At the receiver the combined signal is fed to a series/parallel register 31 only enabled during the 13th line of the field by means of sync. pulse counter 35, decoder 36, correct position within the line determining circuit 32, 33, 34 and gate 37. The six character bits are fed from the register in parallel to six recycling registers 38 via gates 46. Gates 46 are enabled one character interval later each field so that the characters when decoded at 48 and parallel/series circuit 49 are corrected spaced along the video signals making up the character display. This staggered enabling is produced by a comparator 41 receiving a field count at one input and a character count at the other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB613672A GB1370535A (en) | 1973-05-09 | 1973-05-09 | Transmission of alphanumeric data by television |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB613672A GB1370535A (en) | 1973-05-09 | 1973-05-09 | Transmission of alphanumeric data by television |
GB3365172 | 1973-05-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1370535A true GB1370535A (en) | 1974-10-16 |
Family
ID=26240466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB613672A Expired GB1370535A (en) | 1973-05-09 | 1973-05-09 | Transmission of alphanumeric data by television |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1370535A (en) |
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2530766A1 (en) * | 1974-07-11 | 1976-01-29 | British Broadcasting Corp | DATA DISPLAY SYSTEM |
DE2645535A1 (en) * | 1975-10-08 | 1977-04-14 | Texas Instruments Inc | MULTIADDRESS DIGITAL MEMORY |
FR2404359A1 (en) * | 1977-09-26 | 1979-04-20 | Philips Nv | TELEVISION RECEIVER MOUNTING |
DE2840893A1 (en) * | 1977-09-26 | 1979-08-09 | Philips Nv | TELEVISION RECEPTION ARRANGEMENT |
WO1980002489A1 (en) * | 1979-04-30 | 1980-11-13 | Indep Broadcasting Authority | Apparatus for decoding digital information processed for inclusion in a wide band t.v.video signal |
EP0118950A1 (en) * | 1983-03-02 | 1984-09-19 | Koninklijke Philips Electronics N.V. | Teletext device with reduced page-access time |
EP0148733A1 (en) * | 1983-12-28 | 1985-07-17 | Pierpaolo Venier | Method to broadcasting simultaneously two or more televisionprograms |
EP0156709A1 (en) * | 1984-03-09 | 1985-10-02 | Societe Internationale De Micro-Informatique Et De Video - Simiv | Method for inserting digital signals in a television signal and decoder for these signals |
WO1986001667A1 (en) * | 1984-08-24 | 1986-03-13 | Eastman Kodak Company | Apparatus and method for editing electronically-displayed pictures |
EP0241683A2 (en) * | 1986-04-12 | 1987-10-21 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Television signal sub-titling device |
FR2617358A1 (en) * | 1987-06-29 | 1988-12-30 | Thierry Fayard | Communication system using radio waves with on-television display |
US4862268A (en) * | 1980-03-31 | 1989-08-29 | General Instrument Corporation | Addressable cable television control system with video format data transmission |
US4896213A (en) * | 1985-07-16 | 1990-01-23 | Matsushita Electric Industrial Co., Ltd. | Ghost cancelling reference signal transmission/reception system |
US4963968A (en) * | 1988-05-27 | 1990-10-16 | U.S. Philips Corporation | Method and apparatus for validating teletext data |
GB2232031A (en) * | 1989-04-28 | 1990-11-28 | Pioneer Electronic Corp | CATV display with superimposed character information |
WO1996003839A1 (en) * | 1994-07-26 | 1996-02-08 | Maxpro Systems Pty. Ltd. | A video security system |
AU693914B2 (en) * | 1994-07-26 | 1998-07-09 | Ademco Australia Pty Ltd | Text insertion system |
US5887243A (en) | 1981-11-03 | 1999-03-23 | Personalized Media Communications, L.L.C. | Signal processing apparatus and methods |
US6343182B1 (en) | 1996-10-07 | 2002-01-29 | Samsung Electronics | Disk detecting device and method |
US6628887B1 (en) | 1998-04-17 | 2003-09-30 | Honeywell International, Inc. | Video security system |
US7151886B2 (en) | 1990-09-10 | 2006-12-19 | Starsight Telecast Inc. | User interface for television schedule system |
US7748018B2 (en) | 1989-10-30 | 2010-06-29 | Starsight Telecast, Inc. | Arranging channel indicators in a television schedule system |
US7769344B1 (en) * | 1981-11-03 | 2010-08-03 | Personalized Media Communications, Llc | Signal processing apparatus and methods |
US8291461B2 (en) | 2000-10-11 | 2012-10-16 | United Video Properties, Inc. | Systems and methods for managing the distribution of on-demand media |
US8407737B1 (en) | 2007-07-11 | 2013-03-26 | Rovi Guides, Inc. | Systems and methods for providing a scan transport bar |
US8464296B2 (en) | 1998-06-11 | 2013-06-11 | United Video Properties, Inc. | Series reminders and series recording from an interactive program guide |
US8799954B1 (en) | 2006-07-31 | 2014-08-05 | Rovi Guides, Inc. | Systems and methods for providing custom media content flipping |
US8806533B1 (en) | 2004-10-08 | 2014-08-12 | United Video Properties, Inc. | System and method for using television information codes |
US9038103B2 (en) | 2005-05-06 | 2015-05-19 | Rovi Guides, Inc. | Systems and methods for content surfing |
US9185332B2 (en) | 2005-05-06 | 2015-11-10 | Rovi Guides, Inc. | Systems and methods for providing a scan |
US9307278B2 (en) | 2000-03-31 | 2016-04-05 | Rovi Guides, Inc. | Systems and methods for reducing cut-offs in program recording |
US20170110152A1 (en) * | 2015-10-16 | 2017-04-20 | Tribune Broadcasting Company, Llc | Video-production system with metadata-based dve feature |
US9848161B2 (en) | 2003-04-21 | 2017-12-19 | Rovi Guides, Inc. | Video recorder having user extended and automatically extended time slots |
CN108416356A (en) * | 2018-05-28 | 2018-08-17 | 成都创智联云科技有限公司 | A kind of character wheel image calibrating installation and its control method |
USRE47642E1 (en) | 1981-11-03 | 2019-10-08 | Personalized Media Communications LLC | Signal processing apparatus and methods |
-
1973
- 1973-05-09 GB GB613672A patent/GB1370535A/en not_active Expired
Cited By (148)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2530766A1 (en) * | 1974-07-11 | 1976-01-29 | British Broadcasting Corp | DATA DISPLAY SYSTEM |
DE2645535A1 (en) * | 1975-10-08 | 1977-04-14 | Texas Instruments Inc | MULTIADDRESS DIGITAL MEMORY |
FR2404359A1 (en) * | 1977-09-26 | 1979-04-20 | Philips Nv | TELEVISION RECEIVER MOUNTING |
DE2840893A1 (en) * | 1977-09-26 | 1979-08-09 | Philips Nv | TELEVISION RECEPTION ARRANGEMENT |
WO1980002489A1 (en) * | 1979-04-30 | 1980-11-13 | Indep Broadcasting Authority | Apparatus for decoding digital information processed for inclusion in a wide band t.v.video signal |
US4862268A (en) * | 1980-03-31 | 1989-08-29 | General Instrument Corporation | Addressable cable television control system with video format data transmission |
US7889865B1 (en) * | 1981-11-03 | 2011-02-15 | Personalized Media Communications, L.L.C. | Signal processing apparatus and methods |
US7992169B1 (en) * | 1981-11-03 | 2011-08-02 | Personalized Media Communications LLC | Signal processing apparatus and methods |
USRE48682E1 (en) | 1981-11-03 | 2021-08-10 | Personalized Media Communications LLC | Providing subscriber specific content in a network |
USRE48633E1 (en) * | 1981-11-03 | 2021-07-06 | Personalized Media Communications LLC | Reprogramming of a programmable device of a specific version |
USRE48565E1 (en) | 1981-11-03 | 2021-05-18 | Personalized Media Communications LLC | Providing a subscriber specific solution in a computer network |
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