WO2002025924A2 - Procede pour transmettre des donnees avec un signal de television - Google Patents

Procede pour transmettre des donnees avec un signal de television Download PDF

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Publication number
WO2002025924A2
WO2002025924A2 PCT/DE2001/003652 DE0103652W WO0225924A2 WO 2002025924 A2 WO2002025924 A2 WO 2002025924A2 DE 0103652 W DE0103652 W DE 0103652W WO 0225924 A2 WO0225924 A2 WO 0225924A2
Authority
WO
WIPO (PCT)
Prior art keywords
data
signal
transmitted
television
image signal
Prior art date
Application number
PCT/DE2001/003652
Other languages
German (de)
English (en)
Other versions
WO2002025924A3 (fr
Inventor
Matthias Zahn
Original Assignee
Matthias Zahn
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE10101750A external-priority patent/DE10101750A1/de
Application filed by Matthias Zahn filed Critical Matthias Zahn
Priority to EP01978179A priority Critical patent/EP1330916A2/fr
Priority to AU2002210370A priority patent/AU2002210370A1/en
Priority to DE10213298A priority patent/DE10213298B4/de
Publication of WO2002025924A2 publication Critical patent/WO2002025924A2/fr
Publication of WO2002025924A3 publication Critical patent/WO2002025924A3/fr

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
    • H04N7/084—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
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • 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

Definitions

  • the present invention relates to a method for transmitting data with a television signal according to the preamble of patent claim 1.
  • a television signal is composed in particular of an actual image signal (B), the blanking signal (A) and the synchronizing signal (S).
  • the image signal has the information obtained line by line about the brightness distribution of an image original to be transmitted.
  • the temporal course of the image signal is interrupted, it is "blanked out", so to speak.
  • the blanking signal is line-frequency horizontal blanking pulses and appearing in the rhythm of the field change in the vertical blanking pulses., Which have a shorter duration than the horizontal blanking pulses, fabric "m reception side, the viewing on the television picture tube line screen in synchronization with the transmission side
  • the synchronous signal is provided to control the deflection devices of the recording and playback converters as well as a chrominance signal to allow compatible color image transmission.
  • Frequency transmission is usually used to transmit the accompanying sound in television broadcasting a high-frequency sound carrier vibration used.
  • the long-distance image transmission known according to the prior art takes up a wide and complex message channel, which is however not fully used. Approximately during a quarter of the transmission time, no actual image information corresponding to the image signal defined above is sent. The synchronization information for the horizontal and vertical beam deflection is transmitted in the periodically recurring blanking intervals. Still remain, for. B. according to the CIR 625-line standard, full 17 lines per field, which could be occupied with additional information. However, according to the prior art, only about 12 lines are occupied with test and data signals per field. This transfer additional Licher test and / or data signals do not interfere with the television viewer because they are within the vertical blanking.
  • Teletext is an example of such a data signal. Teletext enables a television subscriber to see information from certain areas on the screen in characters and graphics in addition to the television program offered.
  • the editorial preparation takes place at the broadcasting companies and the institutions entrusted by them.
  • the prior art has the disadvantage that the possible amount of data to be transmitted is limited. It would therefore be desirable, if there were further possibilities, to transmit further information to the television receiver.
  • Another disadvantage of the prior art is that in order to transmit the known additional test or data signals, these complex hardware and software in the broadcasting studio have to be connected to the image signal to form the actual broadcast signal.
  • the method for generating the transmission signal is therefore relatively complex, since complex synchronization, in some cases also manually, has to be ensured when the data signals are connected to the actual “contents”.
  • This object of the invention is achieved in the method of the type mentioned by the features specified in the characterizing part of patent claim 1.
  • the basic idea of the invention is that a large number of lines per field are not occupied with data signals for reasons of the tolerance reserve. This is due to the fact that each television receiver has a so-called "cache" and thus only makes part of the active image signal visible to the user. Since the size of the cache differs depending on the design of the television set used, these intervals are not used for data transmission in order not to impair the viewing comfort of the television viewer.
  • the core idea of the present invention is to overcome precisely this prejudice and to use precisely these previously unused intervals for data transmission. The case in which the image reproduction in a television receiver with a correspondingly large cache is impaired is taken into account by the fact that the transmitted data are designed to be minimally invasive for the television image.
  • a particular advantage of the method according to the invention is that the data to be transmitted are not transmitted in the blanking interval, but together with the image signal, that is to say the actual content. This simplifies the preparation of the television signal on the studio side, since no separate synchronization has to be carried out. In this way, the data can also be transmitted independently of the transmitter. For example, a commercial, in or together with which data is transmitted according to the invention, can deliver the same information to a television receiving device regardless of the broadcasting station.
  • the data are advantageously transmitted in the actual image signal.
  • the data is used for any type of recording of the federal signal, e.g. B. recorded by a conventional video recorder, and are thus particularly available when playing the recording.
  • the data will preferably be transmitted in an edge area of the image signal. This has the added benefit of being minimal
  • the data is integrated into the image signal in the manner of a bar code in the edge region of the image signal.
  • a linear bar or dot code i.e.
  • a signal with several brightness or color levels along one edge or both (right and left) edges of the television picture is able to encode sufficient information for certain applications and interferes minimally with the television picture.
  • the row (s) or column (s) in which the data are transmitted are or are predefined.
  • a device embodied in the television receiving device can simply decode the data, the position of which is known in the transmission signal.
  • a particular advantage of arranging the additional signal in a vertical column on the right and left edge of the image is that the shape of the "oval" cache itself is irrelevant as long as it only covers the corresponding parts of the additional signal on its side edges.
  • the signal is a ternary signal.
  • Such a three-state signal has the necessary simplicity of implementation and allows a sufficient data transfer rate.
  • a signal with five states is particularly preferred.
  • the television broadcast signal is preferably formed by combining a data signal containing the data to be transmitted, which has the image signal, and a separate blanking signal.
  • the data is directly connected to the content and the formation of the television signal is not made difficult by the additional data.
  • the data are preferably encoded in an Internet standard.
  • the Internet standard such as. B. SGML, or derivatives such as HTML, XML etc.
  • HTML HyperText Markup Language
  • XML XML
  • the data have text, graphics, images or programs and the like. All forms of data accessible via the Internet, including programs such as B. Java applets, which are executed on their own computer, are possible as data forms.
  • Figure 1 is a schematic representation of the grid area of the visible image reduced by blanking.
  • FIG. 2a shows the occupancy of the vertical blanking interval according to the invention with test line and teletext signals in the first field
  • 2b shows the occupancy of the vertical blanking interval according to the invention with test line and teletext signals in the second field
  • FIG. 3 shows a schematic illustration to explain the method according to the invention
  • 4 shows a schematic block diagram to illustrate the formation of the transmission signal according to the present invention
  • 5a shows the temporal course of a section of a television signal according to the prior art
  • Fig. 5b an additionally impressed on the television signal according to Fig. 5a according to the invention
  • Fig. 5c another one additionally impressed on the television signal shown in Fig. 5a
  • FIGS. 5a to 5c show a television signal which is obtained according to the present invention by superimposing the signals shown in FIGS. 5a to 5c.
  • FIG. 1 shows a diagram which illustrates the reduced raster area of the visible image 2.
  • the visible image whose aspect ratio B to H, z. B. 4 to 3, z. B. according to the CCIR standard B and G standard 576 lines and 720 pixels per line.
  • the invention is equally applicable to all known television systems, such as. B. PAL, NTSC, etc. applicable.
  • that part of the image 1 which corresponds to the entire raster pass and which projects above the visible image is hatched.
  • the entire raster run has 625 lines.
  • FIGS. 2a and 2b show the occupancy of the vertical blanking interval with test lines (PZ) and teletext (VT) signals. Synchronous signal pulses are also transmitted in the blanking interval.
  • a so-called data line is used to transmit program and control information to the transmitters, but also for the television subscriber with the data in the VPS system.
  • special measurement signals e.g. B. in line 10
  • a narrow pulse for reflection measurements e.g. B.
  • Lines 22 and 335 are intended for noise measurements. It is now a crucial concept of the present invention to transmit data in the image signal, ie lines 23 ff. And 336 ff. In the case of a large number of television sets, as explained above, this part will not be visible through the cache of the respective type of television reception set.
  • the ternary signal (s) which, according to the invention, are used for data transmission.
  • the ternary signal is provided line by line on the left and right edge of the image signal, within the cache, that is to say invisibly to the viewer.
  • the two ternary signals on the left and right edges of the image define nine states which allow approximately three bits to be transmitted per line. Since 25 images with 576 lines each are transmitted per second, this results in a transmission rate of approximately 43,200 bits per second, ie 5.4 kilobytes per second.
  • the amount of data adhering to the image information can, for example, be estimated at about 160 kilobytes for a 30-second commercial.
  • VBI data vertical blanking interval
  • B. teletext and the like are added to the program supplied by the playout server, in particular the timely synchronization being a technically difficult task.
  • the program itself is variable, as it is e.g. B. in programs with unpredictable runtime, such as. B. a live broadcast, the case, the problem of time synchronization is particularly serious.
  • the data to be transmitted are assigned to the image signals and are therefore already included in the program and therefore do not mean any additional work for the transmitter.
  • the additional information transmitted according to the invention is also independent of the emitting transmitter with regard to its type and quality. To put it graphically, those who claim a station with the broadcast of a program receive, as it were, an additional information channel free of charge, which is in particular superior to conventional teletext. The latter applies not only in terms of the quality of the image reproduction, but also in terms of ease of use.
  • FIG. 5b A further exemplary embodiment of the present invention is explained in more detail below with reference to FIGS. 5a to d.
  • the 'signal in Fig. 5b shown according to the invention has five states. Regarding the horizontal position, the left part of the additional signal starts immediately after the back porch at the end of the horizontal blanking interval. It has a carefully selected rise time and signal level in order to avoid possible interference with the video content and with everyone relevant video signal standards. The right part of the additional gnals is inserted before the start of the horizontal blanking interval. It ends just before the front porch.
  • the additional signal according to FIG. 5b is inserted within all active video lines of the image.
  • the method according to the invention ensures that the signal levels are chosen for the left part of line 23 and zero in the right part of line 623.
  • the maximum level for the additional signal according to the invention is 140 mV or 20 IRE. In this way, it is unlikely that the additional signal according to the invention will interfere with the image due to reflections, poor reception or the unlikely event that TV will still show parts of the signal on the edge, how to get the fi 5, five possible levels for the additional signal from 0 IRE to 20 IRE in steps of 5 IRE are preferably provided.
  • the additional signal according to the invention shown takes place by means of the attenuation signal ("fading" signal) shown in FIG.
  • fading attenuation signal
  • This ensures a smooth transition from the additional signal to the original video signal. This is done in such a way that the cross-fading into the original video signal occurs with the fall (or rise at the end of the line) of the additional signal. This is preferably done either by appropriate weakening routines or programs in the software, which inserts the additional data into the video, or by an analog cross-fader with an inserter.
  • the rise / fall time of the crossfade control signal is essentially identical to the rise / fall times of the additional signal according to the invention.
  • a table is reproduced below which essentially summarizes the most important preferred orders of magnitude:
  • the additional signal according to the invention enables data to be inserted into analog and digital video in a simple manner.
  • the signal is inserted at the far left and right horizontal positions within the video line. It is not shown in almost all conventionally available televisions and video display devices.
  • the additional signals according to the invention provide an alternative method for transmitting data to a device. It supplements methods that use the vertical or horizontal blanking gaps for data transmission. A particular advantage of this method is that no separate data paths are required.
  • the additional signal according to the invention is inserted within the image and remains with the program, namely during all transmission and storage steps. This in particular ensures synchronicity of the preferably complex video code secured mental data.
  • Trigger data which contains links to data stored in the television set are particularly suitable as data content. Links to data content on the Internet can also be provided.
  • the additional data according to the invention can also be complementary program data which are supplied with the program. They can be temporarily saved for all TV viewers who want to call up the data again after watching a particular scene or a commercial.
  • a variant of the method for generating the transmission signal shown in FIG. 4 is also proposed by the invention.
  • This variant (not shown) is based on a television signal in which a program provided with the additional data according to the invention is delivered to a transmitter, for example on a video tape.
  • a transmitter for example on a video tape.
  • teletext information is inserted into the blanking interval of the signal at the location of the transmitter and sent to a television receiver.
  • the additional data impressed on the television signal which are contained in the television picture, are now detected at the location of the transmitter and inserted into the teletext.
  • the signal transmitted analog or digital by the television station then contains the additional data provided according to the invention in the picture and / or this data "again" in teletext.
  • teletext MPEG-2 is transmitted transparently the data content is not lost or the received television picture is not disturbed. Furthermore, the additional data according to the invention can thus be accessed even without a specially equipped receiver television set. In this way, the additional data according to the present invention can also be used on television sets a corresponding receiver and decoding device can be transmitted, but also television sets which cannot have such devices can access the additional information offered according to the invention Additional facilities for decoding the additional data has, the teletext are changed so that during the broadcast of the television program or a commercial appears an indication that further information is located on a specific page of the teletext, for example on the 555.
  • the information can also be temporarily displayed on page 100 simultaneously with the broadcast of the corresponding program.
  • a trigger line in particular can be provided in the teletext, which ensures that by simply pressing a key, for example the "i" key, the corresponding video page on which additional information is set is displayed.
  • the television receiver can of course also be such that the additional data according to the invention transmitted in the image are installed locally on the receiver in the teletext.

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

Abstract

L'invention concerne un procédé pour transmettre des données avec un signal de télévision, comprenant un signal d'image et un signal de suppression. Selon ce procédé, des données et un signal de télévision sont transmis de manière simple et économique à un appareil récepteur de télévision, de manière que ces données sont transmises dans une région située entre la dernière ligne ou colonne occupée par des signaux d'essai ou de données et une ligne ou colonne prédéfinie du signal d'image.
PCT/DE2001/003652 2000-09-21 2001-09-21 Procede pour transmettre des donnees avec un signal de television WO2002025924A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01978179A EP1330916A2 (fr) 2000-09-21 2001-09-21 Procede pour transmettre des donnees avec un signal de television
AU2002210370A AU2002210370A1 (en) 2000-09-21 2001-09-21 Method for the transmission of data with a television signal
DE10213298A DE10213298B4 (de) 2001-09-21 2002-03-25 Verfahren zum Senden und Wiedergeben eines Fernsehsignals

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10046912 2000-09-21
DE10046912.4 2000-09-21
DE10101750.2 2001-01-16
DE10101750A DE10101750A1 (de) 2000-09-21 2001-01-16 Verfahren zur Übertragung von Daten mit einem Fernsehsignal

Publications (2)

Publication Number Publication Date
WO2002025924A2 true WO2002025924A2 (fr) 2002-03-28
WO2002025924A3 WO2002025924A3 (fr) 2003-01-16

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PCT/DE2001/003652 WO2002025924A2 (fr) 2000-09-21 2001-09-21 Procede pour transmettre des donnees avec un signal de television

Country Status (3)

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EP (1) EP1330916A2 (fr)
AU (1) AU2002210370A1 (fr)
WO (1) WO2002025924A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1450561A1 (fr) * 2003-02-07 2004-08-25 Global View Co., Ltd. Procédé et dispositif de contrôle d'un signal vidéo associé à des donnés de contrôle interactifs
EP2107806A1 (fr) * 2008-03-31 2009-10-07 Harman Becker Automotive Systems GmbH Transmission de vidéo et informations supplémentaires utilisant le domaine de transmission d'image d'un signal de transmission

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0618726A1 (fr) * 1993-03-29 1994-10-05 Whitelay International Limited Procédé d'identification d'une insertion de publicité dans un signal de télévision et appareil utilisant ce procédé
WO1995029558A1 (fr) * 1994-04-20 1995-11-02 Shoot The Moon Products, Inc. Procede et dispoisitif d'emboitement de signaux secondaires a l'interieur d'un signal de television
WO1996027264A1 (fr) * 1995-02-28 1996-09-06 Nielsen Media Research, Inc. Systeme de communication a canal video/audio commun
WO1999000979A1 (fr) * 1997-06-30 1999-01-07 Microsoft Corporation Procede et systeme pour le codage de donnees dans la partie de surbalayage horizontal d'un signal video
EP0899950A1 (fr) * 1996-05-16 1999-03-03 Kabushiki Kaisha Infocity Procede de transmission et d'affichage d'informations et dispositif d'affichage d'informations

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0618726A1 (fr) * 1993-03-29 1994-10-05 Whitelay International Limited Procédé d'identification d'une insertion de publicité dans un signal de télévision et appareil utilisant ce procédé
WO1995029558A1 (fr) * 1994-04-20 1995-11-02 Shoot The Moon Products, Inc. Procede et dispoisitif d'emboitement de signaux secondaires a l'interieur d'un signal de television
WO1996027264A1 (fr) * 1995-02-28 1996-09-06 Nielsen Media Research, Inc. Systeme de communication a canal video/audio commun
EP0899950A1 (fr) * 1996-05-16 1999-03-03 Kabushiki Kaisha Infocity Procede de transmission et d'affichage d'informations et dispositif d'affichage d'informations
WO1999000979A1 (fr) * 1997-06-30 1999-01-07 Microsoft Corporation Procede et systeme pour le codage de donnees dans la partie de surbalayage horizontal d'un signal video

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1450561A1 (fr) * 2003-02-07 2004-08-25 Global View Co., Ltd. Procédé et dispositif de contrôle d'un signal vidéo associé à des donnés de contrôle interactifs
EP2107806A1 (fr) * 2008-03-31 2009-10-07 Harman Becker Automotive Systems GmbH Transmission de vidéo et informations supplémentaires utilisant le domaine de transmission d'image d'un signal de transmission

Also Published As

Publication number Publication date
AU2002210370A1 (en) 2002-04-02
EP1330916A2 (fr) 2003-07-30
WO2002025924A3 (fr) 2003-01-16

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