EP0903037A1 - Television - Google Patents

Television

Info

Publication number
EP0903037A1
EP0903037A1 EP98901442A EP98901442A EP0903037A1 EP 0903037 A1 EP0903037 A1 EP 0903037A1 EP 98901442 A EP98901442 A EP 98901442A EP 98901442 A EP98901442 A EP 98901442A EP 0903037 A1 EP0903037 A1 EP 0903037A1
Authority
EP
European Patent Office
Prior art keywords
television
programme
codes
television receiver
received
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Withdrawn
Application number
EP98901442A
Other languages
German (de)
English (en)
Inventor
Christopher Russell Porter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP0903037A1 publication Critical patent/EP0903037A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/4508—Management of client data or end-user data
    • H04N21/4532—Management of client data or end-user data involving end-user characteristics, e.g. viewer profile, preferences
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/454—Content or additional data filtering, e.g. blocking advertisements
    • H04N21/4542—Blocking scenes or portions of the received content, e.g. censoring scenes
    • 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
    • H04N21/475—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data
    • H04N21/4753—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data for user identification, e.g. by entering a PIN or password
    • 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
    • H04N21/475—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data
    • H04N21/4755—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data for defining user preferences, e.g. favourite actors or genre
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/84—Generation or processing of descriptive data, e.g. content descriptors
    • 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
    • H04N7/0887—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 programme or channel identifying signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • 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

Definitions

  • the invention relates to television receivers including means for enabling the inhibition of television programme display in dependence on the programme content.
  • V-chip V-chip
  • the broadcaster rates each programme in four censorship categories.
  • the values for each category are then transmitted simultaneously as part of the extended data services (EDS) of the Closed Captioning (CC) system.
  • EDS extended data services
  • CC Closed Captioning
  • the parent sets a threshold for each category. If a rating exceeds the pre-authorised value, the V-chip; suppresses the video and audio signals. As the reaction of the V-chip decoder is near instantaneous, the system can easily handle channel hopping. Moreover, the parent does not have to worry about missing content warnings in TV guides or at the start of programmes.
  • the Electronic Industries Association defines the four censorship categories and the number of data bits required to transmit the code: • MPAA rating (equivalent to film classifications, e.g. 18, PG, etc.) - 3 bits violence content advisory level - 2 bits (which allows for a scale of 0 to 3) sexual content advisory level - 2 bits mature content advisory level - 2 bits.
  • CC data can be recorded and reproduced by a VHS VCR during play-back of a programme.
  • recorded and pre-recorded tapes could also contain censorship data.
  • the CC signal would occupy valuable teletext transmission capacity (one line would be permanently lost) and different encoding systems would be required Secondly, it would be very expensive for broadcasters in terms of the duplicate transmission equipment and data bridges (in cable amplifiers) required for both teletext and CC signals.
  • the invention provides a television receiver including means for enabling an authorised person to disable the sound and/or visual display of a received programme according to a classification code received with the television programme, the television receiver comprising means for establishing
  • non-volatile memory means for storing a set of classification codes entered by the authorised person each set of codes being valid at times entered by the authorised person, means for receiving and detecting classification codes multiplexed with the received television signal, means for comparing the set of classification codes with the ⁇ o received classification codes, and means for disabling the sound and/or visual display in dependence on the result of the comparison, wherein the television receiver further includes means for indicating that classification codes are currently being received and detected.
  • This facility has a number of possible uses. It will enable a watch to be
  • non-broadcast programme sources for example video tapes or video discs may not be classified or, in the case of VHS video tapes, the classification code may be obliterated by the recording and playback process.
  • the classification code may be obliterated by the recording and playback process.
  • the indicating means may comprise an indicator lamp which may be a light emitting diode. 30 Such an indicating means may be continually illuminated while classification codes are being received and this allows parents to quickly ensure that their children are not watching a television set tuned to an unclassified programme source by merely glancing at the indicator on the television set.
  • the indicating means may comprise an on screen display shown instead of or in conjunction with the television picture.
  • the display will show the classification of the programme and this may be used to ensure that the desired levels are not being exceeded through either incorrect entry of the classification code by the authorised person or any subsequent corruption of that code, for example because a PIN had been compromised and an unauthorised person had changed the code using the compromised PIN.
  • the on screen display may be shown in mixed mode with the picture and/or in a window in the television picture. This enables the received classification codes to be displayed without obliterating the picture and thus causes less disturbance to the viewers.
  • the on-screen display may be called up by a single button on a remote control unit and/or the television receiver cabinet. It will not normally be necessary for display of the received codes to be restricted to the authorised user and consequently a single button operation enables a fast and easy accessing of the on screen display.
  • FIG. 1 shows a television system for carrying out a method for enabling the inhibition of television programme display in dependence on the programme content.
  • Figure 2 shows in block schematic form a television programme source for use in the system of Figure 1.
  • Figure 3 shows a scheme for code words for classifying programmes, the code words being inserted into a teletext extension packet.
  • Figure 4 shows in block schematic form a television receiver according to the invention.
  • Figure 5 illustrates a process for programming the television receiver to enable classification codes to be entered into memory.
  • Figure 6 illustrates possible on-screen display messages when the receiver is receiving programmes
  • Figure 7 illustrates an on screen display illustrating the performance of the invention.
  • FIG. 1 is a block schematic diagram of a system in which methods according to the invention may be carried out.
  • the system shown in Figure 1 comprises a television signal source 1 , a television transmission medium 2, and a plurality of television receivers 3-1 to 3-n.
  • the television signal programme source may be a normal television broadcast equipment, either terrestrial broadcast or satellite broadcast or could be the programme source for a cable television network.
  • the television programme source includes a teletext inserter and means for entering programme classification codes into an extension packet of the teletext signal.
  • the transmission medium 2 may take any convenient form for example it could be radio waves as broadcast by a terrestrial transmitter or a satellite transmitter or could be a cable network for a cable TV system.
  • the television receivers 3-1 to 3-n are connected to the programme source via the transmission medium 2.
  • a further possible programme source 1 is a video tape or disc on which a programme is recorded for replay by a video tape recorder or a video disc player in which the case the transmission link 2 may be simply the tape recorder or disc player and a cable connecting the tape recorder or disc player to the television receiver.
  • An embodiment of a television signal programme source suitable for use in this system is shown in block schematic form in Figure 2.
  • the television programme source comprises a source of video and audio signals 10 which may for example be a television camera whose video output is fed via a teletext inserter 11 to a transmission network 12.
  • the audio output from the television signal source 10 is fed via a line 13 to a further input of the transmission network 12.
  • a conventional teletext editing system 14 is connected to the teletext inserter 11 and has a further input which is fed from a TV access control equipment 15.
  • the TV access control equipment 15 is arranged to insert into an extension packet of the teletext signal code words classifying the content of the television programme being created by the signal source 10.
  • the TV access control equipment 15 has a first input 16 which receives data from a TV programme scheduling system. This data will for example provide an overall indication of the content of the programme which can be used to inhibit display of that programme at a receiver.
  • the information may for example define the levels of violence, sexual content, mature language or distressing content which may occur in the programme.
  • the TV access control equipment 15 has a second input 17 which receives data from pre-recorded material.
  • Pre-recorded material may already include the coding to indicate the type of content present in the programme and may also include instantaneous data to classify particular events during a programme.
  • a keyboard or other input device 18 is connected to a further input of the TV access control equipment 15. This is to enable an operator to insert appropriate classification codes into a live programme. It is of course necessary to delay the actual transmission of the programme by a short period so that there is time for the operator to enter the appropriate codes at the appropriate times. Such transmission delays are well known for live programmes to enable the broadcasting authority to cut out any undesirable occurrences.
  • the codes generated by the TV access control equipment 15 or received by it and passed to the teletext editing system are then inserted into an extension packet of the teletext signal. In particular they may be inserted into selected bytes of the packet 8/30 format 1.
  • Figure 3 shows the content of packet 8/30 format 1 modified to enable the invention to be carried out.
  • packet 8/30 format 1 modified to enable the invention to be carried out.
  • it comprises a clock run in period and framing code and bytes containing information identifying it as packet 8/30, as format 1 , defining an initial page, a network identity, a time offset, modified Julian date and coordinated universal time.
  • the code 00 could mean no content of that type, the code 01 a low level content, the code 10 a medium level content, and the code 11 a high content level. It is considered useful to have a coding as far as sexual and violent content is concerned for the whole programme and for individual incidents within a programme. Thus for example a parent could decide that programmes having a low or medium sexual content level could be viewed by children so long as the individual events containing sexual content were inhibited. Thus they would set the acceptable programme level to 01 , while they may wish to eliminate incidents having sexual content altogether and thus set the event within the programme code to 00.
  • the distressing content classification is likely to be only of limited duration within a programme.
  • the types of content which are being considered here are for example details where in medical programmes operations are being shown. In this case viewers may well be interested in the medical techniques but find the portrayal of operations distressing.
  • Other instances where distressing content may occur is in news or current affairs programmes. For example interviews with recently bereaved persons may be distressing to some people or pictures showing the effects of famine or other disasters.
  • the mature language content of a programme will normally " also be fairly intermittent and hence it is considered that the proscribing of a whole programme on that basis is perhaps not appropriate and that the instances which the mature language occurs can be suppressed.
  • the region of programme origin code is considered useful in that different areas and countries have different moral codes and consequently what may be classified as a low level of violence in one region may be classified as a medium or even high level of violence in another region.
  • the same considerations may well apply to sexual content and also distressing or mature language content. It would be possible within the receiver to modify the codes for sexual, violent, distressing and mature language content in accordance with the code for the region of origin of the programme.
  • region 1 medium level sexual content may correspond to high level sexual content in region 2. It is also possible to bar programmes originating from a given region, for example for political or religious reasons.
  • FIG 4 shows in block schematic form an embodiment of a television receiver according to the invention.
  • the television receiver comprises an aerial 20 which feeds a conventional tuner 21 and IF and demodulator block 22.
  • a combined video and blanking signal is available at the output of the block 22 and is fed to a teletext decoder 23 and a colour decoder 24.
  • the output of the colour decoder 24 is fed to a video selector 25 which also receives a display signal output from the teletext decoder 23 and a blanking signal via an ORgate 26 from the teletext decoder 23.
  • a control processor 27 controls in conventional fashion the operation of the television receiver. It receives control instructions from a remote control unit 28 which the viewer uses to select a particular channel for display and selects other functions such as teletext display or on screen menu displays.
  • the processor 27 will receive from the teletext decoder 23 the codes which are present in the packet 8/30 format 1 , that is the codes representing the content of sexual matter, violent matter, distressing matter or mature language. It will also store within a non volatile memory 29 codes, which have been entered by the user using the remote control unit, which set the levels of sexual, violent, distressing or mature language content which are acceptable for display.
  • the processor 27 will compare the received codes with the stored codes and depending on the output of that comparison will produce a signal on line 30 which is fed to the video selector 25 via the ORgate 26 and which in appropriate circumstances will cause the video display to be blanked. It will
  • the audio selector produces an output which is fed to the standard audio circuits represented by block 33 and to a loudspeaker 34, while the video selector 25 produces an output which is fed to standard video circuits 35 and ⁇ o to a display device 36.
  • the audio selector 32 has a further input fed from a terminal 37 to which an alternative audio source may be connected. This may be for example a tone generator which replaces any offending words by a bleep or it may be connected to an auxiliary channel for example an Audetel channel to provide alternative words for the offensive words.
  • the Audetel may be for example a tone generator which replaces any offending words by a bleep or it may be connected to an auxiliary channel for example an Audetel channel to provide alternative words for the offensive words.
  • 15 channel is a channel proposed for use for providing an audio assistance signal which provides a description of the scene to help the following of a programme by persons unable to see the display screen clearly or at all, for example blind or partially sighted persons. There will normally be some spare capacity on this channel which will enable an alternative word for possibly offensive words
  • the receiver includes means for indicating that classification codes are currently being received and detected.
  • These means may comprise an indicator lamp, which in Figure 4 is shown as a light emitting diode 38 controlled by the processor 27.
  • the indicator lamp is not, of course, necessarily a light emitting diode but such
  • any other light emitting source controllable by a processor 27 could be used.
  • Such an indicator means has the advantage that it can be continuously illuminated while the codes are being detected without affecting the displayed picture and hence the viewer's enjoyment. Thus a parent can, at a glance, see that the codes are being detected while allowing full enjoyment of the programme.
  • a limitation of such a device is that although it indicates that the classification codes are being received and detected it gives no indication as to what those classification codes are. Thus if the stored codes had been corrupted there would be no indication that possibly undesirable programmes were being viewed.
  • the processor 27 is programmed to produce, in response to a request made by pressing a button (preferably a single dedicated button) on a remote control unit or on the television receiver cabinet, an on-screen display of the detected codes.
  • a button preferably a single dedicated button
  • Such an on screen display is illustrated, by way of example, in Figure 7. Consequently a parent may check that the appropriate codes are programmed into the memory or at least that the present programme does not inadvertently exceed the level intended, either because the parent had not entered the correct code or because the code had become corrupted.
  • the on screen display can be used in any convenient mode. Thus it could overwrite the picture and have an automatic time out so that it disappeared after one or two seconds. Alternatively a second button press could delete the on screen display. It could appear in mix mode so that it is superimposed on the picture which remained visible through it in the same manner as mix mode teletext page display. Alternatively it could appear in a relatively small window in a corner of the screen. A further refinement is to make the on screen display show one line of text only with the various categories being scrolled through the window.
  • Figure 5 A-E illustrates an on screen display sequence which enables a person to enter a single set of codes into a television receiver.
  • On initial switch on the on screen display sets out a message which invites the user to enter a personal identification number. This is assuming that authorization is checked by means of a PIN.
  • the PIN may be burnt into a memory by the manufacturer who then informs the buyer of the number of the PIN so that the owner can initiate the selection of the classification.
  • An alternative is to set the PIN to all zeros at the factory and for a routine to be entered into when the set is first switched on to change the PIN to any number that the user desires. Subsequently when it is desired to change the classification a key to request this is pressed on the remote control unit.
  • Screens 10, 11 and 12 show the process for enabling distressing content to be excluded. In this particular case it is only excluded for the events in which the distressing content is present and not for the whole programme. It is considered that distressing content is unlikely to be relevant to a whole programme but only to events within a programme.
  • distressing content may be for example the showing of operations in medical programmes or the showing of the scenes of accidents or other disasters in news programmes. These incidents will only be a small portion of such programmes and the programmes can be enjoyed readily with those incidents deleted.
  • screens 13 to 15 A similar process is shown in screens 13 to 15 which enables the programming of the mature language content which is acceptable. Again this only excludes the specific events rather than the programme as a whole since the occurrence of possibly offensive words is likely to be only a small proportion of the programme as a whole especially if programmes having excessive sexual or violent content are already excluded.
  • Screens 16 and 17 illustrate the programming of the region of origin. It enables the user to exclude programmes from certain regions if desired. This may be desirable for example where a particular country is transmitting propaganda material which may not contain excessive sexual content or violent content or even distressing content or mature language, but the authorised person may wish to prevent reception of programmes of such a nature.
  • region of origin codes An alternative use for the region of origin codes is to modify the effective codes for sexual, violent, distressing content or mature language depending on the source of the programme.
  • region A it may be desired that the level of sexual content accepted is moderate level only because what is considered moderate in region A may be considered to be high in the region where the receiver is located.
  • This code of changing may be programmed permanently into the receiver or may be settable by the user.
  • Screen 18 is the final screen presented and confirms the choices which have been made by the user.
  • control processor may, of course, store various on screen displays in a number of different languages, the language choice being made by the user when accessing the on screen displays thus enabling a common control processor to serve sets sold in various different countries.
  • Figure 6 shows examples of on screen messages which are displayed when the access control system is in operation.
  • the first screen shows that the programme is not available and states that it is due to high levels of sexual content. This message will of course vary according to the reason for non availability of that particular programme and is defined by the coding associated with it.
  • the second screen shows that the television is temporally blanked due to moderate violent content. Thus, during most of the programme the display will be available, but there is a temporary blanking of the visual display to prevent the viewer seeing violent content.
  • the third screen shows similarly that the display is temporally blanked due to distressing content.
  • the fourth screen shows the picture displayed with a message superimposed upon it stating that the sound has been muted because of mature language.
  • authorization of the user able to change the coding has been by means of a PIN.
  • a user can be authorised.
  • One possibility would be a fingerprint detector so that it would be necessary for the user to place his or her hand or fingers on a detector pad which compare the fingerprint with one stored in the receiver. This would avoid any problems of forgetting the PIN or the PIN being compromised, for example one of the children discovering the PIN and resetting the classification codes.
  • a further possibility is to include a video camera on the receiver which will look at the face of the person wishing to change the code. The output of the video camera can be compared with a

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Computer Security & Cryptography (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Système permettant de contrôler et de vérifier si un programme de télévision peut être regardé. Dans ce système un code de classification est envoyé en même temps que le signal vidéo, par exemple dans un paquet d'extension d'un signal de télétexte, et un décodeur (23) détecte les codes reçus et les envoie à un microcontrôleur (27). Un utilisateur autorisé peut entrer des codes de classification de programmes autorisées à l'aide d'une télécommande (28). Les codes représentant les classifications autorisées sont stockés dans une mémoire non volatile (29). Les codes reçus et les codes autorisés sont comparés dans le microcontrôleur (27) qui invalide les circuits vidéo (25) et/ou audio (32) si les codes reçus ne sont pas des codes autorisés. Un indicateur (38) est prévu pour indiquer si les codes de classification sont reçus et détectés.
EP98901442A 1997-02-15 1998-02-12 Television Withdrawn EP0903037A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9703194 1997-02-15
GBGB9703194.2A GB9703194D0 (en) 1997-02-15 1997-02-15 Television
PCT/IB1998/000177 WO1998036570A1 (fr) 1997-02-15 1998-02-12 Television

Publications (1)

Publication Number Publication Date
EP0903037A1 true EP0903037A1 (fr) 1999-03-24

Family

ID=10807758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98901442A Withdrawn EP0903037A1 (fr) 1997-02-15 1998-02-12 Television

Country Status (6)

Country Link
EP (1) EP0903037A1 (fr)
JP (1) JP2000516426A (fr)
KR (1) KR20000064923A (fr)
CN (1) CN1217848A (fr)
GB (1) GB9703194D0 (fr)
WO (1) WO1998036570A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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GB9703194D0 (en) 1997-04-02
KR20000064923A (ko) 2000-11-06
JP2000516426A (ja) 2000-12-05
CN1217848A (zh) 1999-05-26
WO1998036570A1 (fr) 1998-08-20

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