CN1276126A - Receiver and method of controlling the viewing of television rogrammes - Google Patents

Abstract

A method of controlling the viewing of television programmes according to their content involves sending codes using an auxiliary data channel which indicate the level of sexual, violent, distressing, etc. content. These codes are assembled into a teletext signal and detected at a receiver. The receiver is programmed by entering corresponding codes which indicate allowable or forbidden content and cause the display to be blanked and the sound to be muted in dependence on the transmitted codes. The codes are additionally inserted in displayable form in a teletext page to enable a viewer without an automatic means of controlling the display of the programme to monitor the classification of a programme being viewed. A system, programme source and receiver are also described.

Description

Demonstration according to the content blocking TV programme

The present invention relates to a kind of method and apparatus, can forbid the demonstration of TV programme according to programme content.

Passed through a kind of law in the U.S., all television receivers with the above display screen of certain size that require to sell from 1998 must have a kind of device, can make father and mother prevent that children from watching and comprise violence, the coded program of property and vulgar language.A kind of so-called " V sheet " is suggested, it will monitor the sign indicating number that sends with TV signal, and when this sign indicating number to indicate be to comprise violence, during the forbidden program material of property or other problem, television receiver is not worked, dislike or children are not suitable for and these program material may be some spectators.

In the V of U.S. chip system, the broadcaster decides grade for each program by four kinds of examination types, and the part of every type value as closed captioning system (CC) extended data service (EDS) sent simultaneously.How long program is aloft play, and how long this value also sends.

Use a kind of inlet controlling organization, father and mother are provided with threshold value for every type.If deciding grade and level surpasses the value of authorizing in advance, this V sheet just suppresses video and sound signal, because the reaction of V sheet decoder is near instantaneous, thereby system's jump problem of treatment channel easily, and father and mother needn't worry to miss the content of warning in TV guide or program beginning.

Electronic Industries Association (EIA) has stipulated four kinds of examination types and has transmitted the required data bits of sign indicating number:

-3 of MPAA levels (with the movie ratings equivalence, as 18, PG etc.)

Violent content is advised-2 (yardstick of permission is 0 to 3) of level.

Property content advisory level-2

Adult's content advisory level-2

Same principle is applied to a kind of system through field test in Canada, but at present, two kinds of systems are inequality.

All U.S.'s television sets of after in July, 1993, making must comprise a kind of CC decoder for replace, current CC decoder (the SAA5252 decoder of selling as Philips semiconductor company), when this pattern of full text is arrived in changing-over, can make TV image become blank, they also have the appropriate display characteristic, father and mother produce a kind of OSD menu, so that can arrange inspection threshold.

Different teletexts, CC data are write down and regeneration by VHS VCR during programme replay.Band that therefore, write down and record in advance also can comprise the examination data.

In Europe, implement the problem of V sheet type system, in general than North America complexity.Broadcaster is not by single governability, and culture means that with the difference of language acceptable moral standards are inconsistent, and the television system of imitated 625 lines has technical problem, and the reserve capacity that is used for the excessive data signal is smaller.

The most obvious solution is to adopt U.S. system, yet this also has some shortcomings.

At first, broadcasting equipment, CC signal will occupy valuable teletext and transmit capacity (a bar line will always be lost), and need different coded systems.

Secondly, be too expensive to broadcasting equipment, because teletext and CC signal demand double transfer equipment and data bridge circuit (in cable amplifier).

Once more, consumer electronics manufacturers needs extra administrative expenses to be used in every television set and PC TV card offe telex text and CC decoding.

The notion that the information Control television receiver that can allow father and mother utilize broadcasting equipment to send is watched not is new, has put forward in the WO 83/02208 that publishes June 23 nineteen eighty-three.In this document, propose, send a kind of sign indicating number by the teletext signal that sends with TV signal, this yard is to form as the selected line number of the teletext page or leaf of being given, therefore, when undesirable incident occurring, send number of pages and line number in the blank cycle on the scene.On receiver, the teletext decoder is arranged to seek relevant page or leaf regularly, and recognizes the line number that is sent, and distinctive line number indicates the specific sound and the grade of visual incident.

Very clear, so a kind of arrangement does not make the beholder, and he has the teletext decoder, but the still groundless row address that sends on the page or leaf of being given is forbidden device shown, can judge whether watch it to programme content, or allow they responsible people (children) watch it

The proposal of another kind of control program viewing is disclosed among the UK Patent Application No.9619878.3 (PHB34110), wherein the program grade sign indicating number is to send as the data of wrapping 8/30 form 1, these bags are the transmissions that are independent of page or leaf, send very frequent, it approximately is one second interval, like this, the classification sign indicating number can be revised fast, for example is used for suppressing containing undesirable incident of looking indivedual the weak points of material.Because these teletexts comprise displayable data, can not allow does not have the beholder of control system to obtain the information of the current programme content that is sending easily.

An object of the present invention is to allow father and mother or other can in television receiver output, exercise editting function to this receiver potentate.

The invention provides a kind of method, can allow a donor that the sound of a TV programme or its part and/or image demonstration are not occurred according to programme content.This method may further comprise the steps:

I) with the content of TV program classification of whole and/or moment,

Ii) produce the code word represent institute's allocation level and

Iii) with the multiplexed teletext signal of the TV signal of representing program in can with machine

Read and displayable form insertion code word.

But not only can show but also classification code word that machine is read by providing, have and comprise a teletext decoder but do not comprise the sign indicating number of automatics setting and the sign indicating number that sends being made comparisons to decide and do not allow the beholder of receiver of automatics of demonstration can make program classification according to the user, therefore, by by the present invention but the classification sign indicating number being inserted the display part of teletext data and guaranteeing that these yards can be detected and can make the measure of automatics action, if in receiver, comprise automatics, then just may automatically allow sound and/or look signal and do not occur.If in receiver, comprise automatics a teletext decoder is not only arranged, then just making sound look signal by beholder's operation of supervising can not occur, thereby, the beholder can call the program grade page or leaf, automatically forbid Presentation Function even used receiver provides, also can monitor the classification of the current program that is sending.

The advantage of utilizing teletext to send the transmission sign indicating number is, in many countries the teletext signal being inserted the foundation structure that sends in the signal puts in place, a large amount of television receivers combines with the teletext decoder now, thereby, the beholder needs the teletext service, and a kind of editing device can quite easily be added on receiver and the program creation source.

Therefore, for sound and/or image are not occurred, the content of program supplier monitoring program, and by inserting the sign indicating number of relevant teletext signal, the suitable indication of programme content is provided, and the people of control television set can utilize this sign indicating number to determine whether that these programs should be shown (as seen and/or in word).By adopting the teletext bag to transmit the method for sign indicating number, if automatics is provided, then can produces visible demonstration sign indicating number and forbid demonstration automatically, if receiver only has basic teletext decoder, then only produce the visible demonstration sign indicating number of these yards.

The teletext page or leaf sends successively, thereby can give some page priority, and repetition rate can be complementary with the grade of content like this, and just when high level sign indicating number occurred, this page or leaf sent more frequently.Thereby if desired, classification can often change at an easy rate, so just can allow occurrent may undesirable event edits falling, and does as a wholely simultaneously, still allows to watch this program.For example, if news and topical program may comprise pain or undesirable sight, as the accident of area of war.As one on the whole, they are the quite short part of program.In addition, bag can be sent out more frequently, even make shorter incident, for example a word also can be eliminated.

With the displayable yard precalculated position that can be presented on the teletext page or leaf, machine-readable sign indicating number is exactly to produce displayable sign indicating number on the precalculated position.

The advantage of this way is only to need to send a cover sign indicating number, be exactly that this cover sign indicating number provides displayable information, this can reach like this, promptly on page or leaf, distribute many certain location to be used to show the information relevant with program grade, the data that receive can be analyzed on receiver with such method, as everybody knows, showing yard classification of having stipulated program that is positioned at institute's distribution locations on the page or leaf, therefore, if detected sign indicating number surpasses by what the user was provided with and deposits sign indicating number in the position of being distributed on page or leaf, then control circuit can utilize this information envoy's purpose to show to be under an embargo.

In another approach, displayable sign indicating number can freely be placed on the teletext page or leaf, and machine-readable sign indicating number is positioned at the precalculated position on the page or leaf.

Such advantage is to building page or leaf very big editor's degree of freedom to be arranged, that is to say that displayable sign indicating number does not limit the layout that shows page or leaf, but require the classification sign indicating number to send twice, information is shown, once be to produce machine readable code, two functional separations can be obtained bigger flexibility in page layout, for example, machine readable code can be placed on the single file, as the 1st row, playback equipment often allows its blank, so that with the unpack on the title of page or leaf and the page or leaf.

Machine readable code can conceal from demonstration.When adopting this method, if the 1st row used, in the beginning of the page and show between the text on the page or leaf and still have the row that does not show.

In another embodiment, machine readable code can be included in the expanding packet relevant with showing page or leaf.

In our a common unsettled UK Patent Application No.9619878.3 (PHB34110), provided all advantages of mentioning, yet, also send the attendant advantages that displayable classification sign indicating number provides and be retained.

Machine readable code also can be protected by a kind of error correcting code; when adopting when can show that sign indicating number and machine readable code are identical methods; they are only protected by odd-even check, and current teletext decoder will be carried out this odd-even check to the character that all receive in one page.Yet,, just might provide a kind of error protection greatly to these sign indicating numbers if machine readable code is concealed by demonstration.For example, disclosed in UK Patent Application No.9619878.3 (PHB 34110), the machine readable code that is not shown in expanding packet can be to breathe out plain code.Equally, if machine readable code is concealed on the given row of one page, so also comparable demonstration sign indicating number obtains more error protection and don't the beholder is obscured.

Current teletext decoder; especially better simply type; with the odd-even check of only carrying out each character; if character has different error protection sign indicating numbers; then shown character will not be identical with the character of coding transmission after odd-even check; therefore, if these characters are shown, they will be skimble-skamble or the beholder is obscured.

The classification sign indicating number can be inserted in the current program page or leaf, and it comprises the displayable information relevant with the current program that is sending.

This page can send on this fixed number of pages, and number of pages can be stored in the nonvolatile memory of receiver, thereby can be by come access by a singly-bound on remote control unit.

Send because the teletext page or leaf is an order, different priority allocation can be given different pages or leaves, therefore any specific page or leaf can be sent by the frequency that broadcasting equipment is determined, so, broadcasting equipment can be according to the content changing transmission frequency of page or leaf.Thereby when classification will change, but assignment page sends high priority, like this, the time-delay minimum of this page in transmission, this equipment can be used to forbid short incident or word.

The transmission frequency of current program page or leaf can increase with the increase of classification level.

The increase of the time of access one page with transmission frequency reduces, and that is to say, this page is to send on the short time interval.Therefore, when the beholder needs one page,, it will be less than or equal in succession interval between the page or leaf that sends for the desired time occurring.If higher classification sign indicating number is sent out, then the beholder is receiving and is showing before this page that short maximum latency will be arranged.Such advantage is, is unsuitable for the material that children watch if program comprises, and then father and mother will obtain notice very soon.

This method can comprise further step, produces error correction bit for inserting in the bag with code word, and in one embodiment, code word is by breathing out the plain code protection, and code word is the bright coding in 4/8 Kazakhstan.

Can receive the classification sign indicating number safely like this, thereby, make because in forbidding of causing of the transmission of classification code word and mistake in detecting or allows demonstration probability of errors minimum.

One or more grading criterion, every kind available comprises that two code word encodes, a kind of independent criterion can be applicable to the separate event in whole program or the program, grading criterion can comprise one or more violent content, the property content, painful content, vulgar language.

Adopt two bit word to allow this criterion is provided with four possible grades for every kind of criterion, with the act of violence criterion is example, and sign indicating number 00 can be represented zero violent content, and sign indicating number 01 is low-grade act of violence, sign indicating number 10 is that the act of violence and the sign indicating number 11 of medium grade is high-grade act of violence.

One of code word can be represented the area of program source, and the area in source can be represented by four bit codes.

The indication in the area of program source may be useful from the sensitiveness angle of Different Culture.Therefore, make that the unhappy content of a nationality or religious group may not be a problem then to another nationality.Therefore, the probability of revising the meaning of specific sign indicating number depends on program source and to television receiver control donor's sensitiveness, this may be useful.Thereby may there be bigger or less degrees of tolerance in some corporation to property or act of violence, and according to the source area sign indicating number that provides, grade can increase in the place of receiver or reduce.

In a kind of embodiment of this method, expanding packet that comprises code word changes the beginning of incident of classification or/and when finishing in the program in classification just, can be inserted in the most close the blank cycle.

Usually, wrapping 8/30 lattice sends once for 1 about each second.For example, be under an embargo in order to make independent word, it is accurate inadequately allowing bag also send in the most close blank spaces, and making word be pressed time enough is to occur in 20 milliseconds of the undesirable words.

Can provide and substitute the replacement word of thinking to the improper word of selected classification level.

These words can send on an accessory channel, for example, the Audetel that advised service, it provides a kind of sound to help signal to describe action in the sight.

The present invention also provides a kind of sound and/or visual absent variable method that makes TV programme, and this method may further comprise the steps:

Iv) set up subscriber authorisation, program that regulation can not be put or part,

V) will write the memory in the television receiver corresponding to the code word of the programme content of hope compacting

In,

Vi) receive and comprise the TV signal that can show code word and machine readable code word, these codeword bit

In with the multiplexed teletext signal of TV signal in, code word is represented program grade,

Vii) the code word that receives and the code word that writes are made comparisons and

Viii), sound and/or image are not play according to result relatively.

The TV signal that receives has potential spectators, and as children, undesirable content can be controlled with this method.

In addition, the classification that is added on the program of watching can monitor that the classification sign indicating number that provides with the understandable form of beholder is provided this teletext page or leaf by the method that shows a kind of specific teletext page or leaf.Therefore, this method allows the beholder to watch the classification of program on the teletext demonstration page or leaf of standard, if comprise automatics in receiver, also allows program automatically not show.

The machine readable code word can be arranged in the expanding packet of teletext signal.This can be one page relevant with expanding packet, as wrap 26, or the not enough page or leaf relevant with expanding packet, as wrap 8/30 form 1, the television set of a teletext decoder that the expanding packet that can detect and decode is housed or video recorder can be used for according to the classification of its content monitoring program, if the user squeezes into the classification of wishing compacting, then this device can be forbidden the output of television set or the writing function of video recorder.

The step I of this method v) can be squeezed into PIN(Personal Identification Number) and finish, and replacement scheme or step I of the present invention v) can realize by monitoring donor's physiological characteristic.

A kind of quite simple method of setting up mandate is to issue the PIN that has only the donor to know.The PIN that squeezes into compares with the PIN of storage (having only the donor to know), if meet, then the classification sign indicating number can be modified.

Adopting the shortcoming of PIN is that the user may forget or be found by unauthorized user, and a kind of needs more replacement scheme implemented of complex apparatus are the physiological characteristics of monitor user ', as fingerprint, and voice, facial characteristics, etc.

Code word can be squeezed into remote control unit.

Remote control unit often provides with television set, and always provide with the television set that can receive with showing the teletext data, they have a numeric keypad, can be used to squeeze into PIN, their function also can provide other key, as long as can be used to squeeze into the classification sign indicating number of hope.

The message that can produce a kind of screen display helps squeeze into code word.

By means of this device, squeeze into the process of the sign indicating number relevant step by step and can and select by the instruction that shows in succession to guide with different grading criterion.

The on-screen-display messages of the reason that a kind of beholder's of notice sound or image can not occur also can produce.

A kind of message like this will avoid the beholder to think a kind of fault of television set, cause the demonstration of sound or image to end.Message for example, is such form: " it is because vulgar language that sound is under an embargo ", or " it is because poignant incident that demonstration is under an embargo ".

A kind of forbidden sound can substitute with another kind of sound.

Therefore, a kind of undesirable word or incident can be replaced by " Bi-Bi " sound or other sound, so just guarantee that the beholder understands because controlled function is under an embargo this word, and with noiseless this word that replaces, it may be considered to a kind of fault else if.

This another kind of sound can be stipulated by the signal that receives.

Therefore, the alternative original word of a series of sound, for example, the sound that substitutes can be according to the length of replaced incident, and in a further example, the consentient word of change can substitute the unallowed word of selected classification by sending in the accessory channel.For example, such change word can utilize the capacity of any free time in the Audetel service of advising to send.

The present invention also provides a kind of TV signal program source, comprise that the teletext signal inserts equipment, the device of the TV signal classification that the programme content that will transmit according to them will transmit, but produce the device of representing the code word of distributing to program or its part classification and the device that code word is inserted the teletext signal with display format and machine-readable form.

Many current TV signal source comprise teletext inserter and many service facilities, comprise the expanding packet apparatus for encoding that relates to page or leaf to non-.

The teletext signal can be by world system teletext standard definition, and the machine readable code word can be inserted expanding packet, and expanding packet can be bag 8/30 form 1.

This expanding packet sends with about one second interval usually, and can not be page or leaf, and it can be by many teletext decoder decodes, the information that comprises the program supplier, the homepage that obtain, and real-time clock (RTC), in this bag four bytes being arranged, is to be used to send the program grade sign indicating number according to the present invention.

Also comprise such device, can during single program, change classification.

This just can use the classification sign indicating number with two kinds of patterns, and at first avoid receiving whole program and think and can not receive, secondly be to allow to watch program, but not cancellation may undesirable incident.The incident length that can be excluded depends on the frequency that sends sign indicating number, wrap 8/30 form 1 normally per second send once, therefore, incident can be easy to eliminate with the multiple of second, in addition, also can send additional bag 8/30, this will allow to be timed to immediate blank cycle.

Device to the code word error correction can be provided, and word can be protected by breathing out plain code, and code word can be the bright coding in 4/8 Kazakhstan.

Employing goes out error protection to code word, allows the probability of program or incident demonstration or disable programs or incident demonstration to reduce in the program mistakenly because the mistake in the transmission causes.

Code word can comprise the word of the grade of stipulating following one or more types: property exposure, violence, vulgar language, painful image or sound.

This class type both can be applicable to sound and also can be applicable to image, can be applicable to whole program, or the separate event in program.For example, news program can have the content of describing high-grade violence the ad hoc report that comes from area of war.They also can comprise painful content, for example because the result's of famine famine victim's picture.Other examples of material that some beholder is agonized is included in and shows operation in the medical science program.

These code words can further comprise the code word that indicates the program source area.

There is different customs in different areas with country, may just not be accepted in different areas at an acceptable material in area, therefore, thinks low-grade violence in an area, may be considered to middle rank or senior violence in another area.

The present invention also further provides a kind of record carrier, comprise and represent the TV Festival destination data, representative is to the classification code word of the whole of program and/or moment content distribution classification, with relevant teletext signal, wherein code word is comprised among the teletext signal, existing displayable, machine-readable form is arranged again.

This just can be controlled and classification the media such as the duplicating of videotape or CD of writing down in advance, and these recording mediums can be bought by the donor who does not wish to watch.That is to say that father and mother can think that the videotape that their child selects is unaccommodated.If the stage division of record carrier is identical with broadcast material, then practicable control when they watch.

The teletext signal can be followed world system teletext standard, and the machine readable code word can be inserted in the expanding packet, and expanding packet can be bag 8/30 form,

The teletext signal can be transformed into multilevel code to reduce the bit frequency of teletext signal, and in this case, record carrier can be the VHS videotape.

As everyone knows, the teletext signal can not and duplicate with VHS video tape recorder reliable recording usually, and this is because its bandwidth constraints.In order to overcome this problem, various proposals are arranged, one of them is to disclose in EP-A-0608960 (PHB 33832), in this application, has and is expanded into the five-element in delegation's teletext data blank cycle on the scene.The not all teletext data of result can be stored, and must select data when record.

A kind of usage of this scheme is to be deaf person's record declaration captions, and this sends on 888 pages usually.Available the same manner record classification sign indicating number, but like this, certainly, further any other of restriction may be wished the teletext information that writes down.

A kind of VHS with on the further proposal of record teletext data be disclosed in UK Patent Application No.9605614.8 (PHB 34056).In this part proposed, the teletext signal was transformed into the multilevel code of lower frequency, and this just can and duplicate the teletext data that all are sent out with the storage of VHS video tape recorder, thereby can be used for making the classification sign indicating number in the expanding packet to store on tape.

The present invention also further provides a kind of television receiver, it is suitable for receiving and the demonstration TV signal from such TV signal source or record carrier, this television receiver comprises a teletext decoder, extract the device of machine readable code word, the classification of the current program that receives is distributed in this code word representative, demonstration can show the device of classification sign indicating number, squeeze into the device of the information of any program grade of representative, this classification representative wishes to forbid the demonstration of this program, device and the result that depends on comparison carries out program and allows or forbid device shown with the size scale squeezed into receive.

Be driven into television receiver with the program of hope compacting or the corresponding sign indicating number of part of program, receive corresponding sign indicating number, in receiver, compare, so that can control to the demonstration and the voice output of receiver with the sign indicating number of squeezing into by the teletext signal.If sign indicating number is included in the teletext expanding packet, be not relate to page or leaf, as wrap 8/30 form 1 that this does not just need a teletext decoder and is seeking specific page or leaf always.Substitute the teletext decoder and can implement the function of the selected page or leaf of its normal inquiring user, it will automatically inquire about the non-expanding packet that relates to page or leaf.

Authorization device can be provided, and allows to have only a donor to enter program grade.

Authorization device can comprise the device of squeezing into PIN, and the device that the PIN of the PIN that squeezes into and storage is made comparisons with when if the PIN with squeezing into of storage is identical, allows to squeeze into the program sign indicating number.

This just provides a kind of easy safe device, guarantees to have only a donor, and as father and mother, variable classification sign indicating number, however it also has shortcoming, and sign indicating number may be forgotten about or as you know.Under first kind of situation, just be difficult to change classification, under second kind of situation, a unauthorized people can change classification.

A kind of replacement scheme is, authorization device can comprise the device of monitoring donor physiological characteristic, the device of the feature that storage monitors, require to change the device of receivable programme content, the device of monitoring feature as requested, with the device that the feature with storage that monitors is made comparisons, if relatively more correct, the device of receivable programme content is changed in permission.

Various physiological characteristics may be utilized, for example, and fingerprint, facial characteristics.

Fingerprint detector is to be proposed for the credit card validation of point-of-sale terminals existing institute from them to understand, and recognizes that a kind of device of facial characteristics is disclosed among the EP-A-0551941 (PHB 33765).

The advantage of utilizing physiological characteristic is that they are difficult to make mistakes, and does not need to remember PIN or other external data.

A kind of device can be provided, and it produces a kind of on-screen-display messages, notify the beholder why sound and/or show occur.

When a program did not receive or is interrupted owing to its classification, this device can prevent that the beholder from thinking by mistake is that receiver is out of order.

A kind of device can be provided, the voice signal of unaccommodated word with a kind of change replaced.The voice signal of this change can be represented the consentient word of change, and the part that the word of this change can be used as TV signal is received.

Therefore, when contentious word occurred, they can be replaced, for example uses a kind of " Bi-Bi " signal, and a kind of replacement scheme is that the consentient word of their available changes replaces.A kind of method that realizes this scheme is to utilize a kind of accessory channel, and program producer sends the word of change therein, and a kind of accessory channel that may adopt is proposed Audetel passage, is used to blind person or part eyesight person to send sound and helps message.

A kind of device can be provided,, sound and visible demonstration not occurred if no classification sign indicating number is received with TV signal.

Can duplicate unassorted program like this and control, this situation may be the useful life owing to them, perhaps, videotape for example, be that especially, the band of very big objection can not have corresponding classification sign indicating number just to be produced because they derive from non-sources of law.

The present invention above and its feature and advantage will must be clearer by following description.The method of taking is the example for embodiment of the present invention, and referring to accompanying drawing, wherein:

Fig. 1 shows the television system of implementing a method according to the present present invention.

Fig. 2 shows the block diagram according to a kind of tv programme source of the present invention.

Fig. 3 shows the code word chart that is used for program grade.Code word is to insert the teletext expanding packet.

Fig. 4 shows according to a kind of television receiver of the present invention with the block diagram form.

Fig. 5 illustrates the process of programming to by the television set of method work of the present invention.

When Fig. 6 illustrates this method and is cited possible on-screen-display messages and

Fig. 7 illustrates and can show that classification sign indicating number and machine readable code include the display screen when showing in the page or leaf for.

Fig. 1 is the block schematic of a kind of system that can implement by method of the present invention, and system shown in Figure 1 comprises a TV signal source 1, television transmission media 2 and many television receiver 3-1 to 3-n.The TV signal program source can be common television broadcast device, and both also satellite broadcasting of the broadcasting of land perhaps may be the program source that is used for cable television network.Tv programme source comprise the teletext inserter and with the program grade sign indicating number can show and machine-readable form is squeezed into the equipment of teletext signal.The sign indicating number of machine-readable form can show transmission in the page or leaf of teletext signal, or can send in the expanding packet that does not show, replacement scheme is that the machine readable code that sends in showing page or leaf can viewed person conceal.Transmission medium 2 can be taked any form easily, and for example, it can be the radio wave by the broadcasting of the transmitter on land or satellite transmitter, perhaps can be the cable system that is used for wired TV system.Television receiver 3-1 to 3-n is linked to program source by transmission medium 2.A kind of further possible program source 1 is videotape or dish.Record superincumbent program by video tape recorder or videodisc player playback, in this case, transmission channel can be video tape recorder or videodisc player and the cable that video tape recorder or videodisc player is linked to television receiver simply.

A kind of embodiment according to TV signal program source of the present invention is shown among Fig. 2 with the form of block diagram, tv programme source comprises video and audio signal source 10, for example, it can be gamma camera, its video output is delivered to transmission network 12 by teletext inserter 11, deliver to another input of transmission network 12 by circuit 13 from the audio output signal of TV signal source 10, a kind of common teletext editing system 14 is linked to teletext inserter 11, and TV access and exit control equipment 15 is linked to another input of this system 14.

TV access and exit control equipment 15 is equipped with, and is used for inserting the teletext signal code word to the content of TV program classification of being created by signal source 10.These code words are can show and two kinds of forms of machine readable, first input 16 of TV access and exit control equipment 15 is to receive data from TV Promgramming system, these data will be for example, and whole indications of programme content are provided, and is used in to forbid on the receiver that this program shows.This information can, for example, regulation may appear at the violence in the program, property content, the grade of vulgar language or painful content.

Second input 17 of TV access and exit control equipment 15 receives the next data of material that record in advance.The material that records in advance can comprise the coding that indicates the content type that occurs in program, also can comprise the transient data to the particular event classification during the program, and keyboard or other input equipment 18 are linked to another input of TV access and exit control equipment 15.This just can allow an operator that suitable classification sign indicating number is inserted a reality and broadcast in the program.This needs the actual transmissions of program that the time-delay of short time is arranged certainly, so that allow the operator squeeze into suitable sign indicating number in due course if having time, such transmission delay is well-known to broadcasting program in fact, this allows broadcast authorized people can excise any undesirable incident, for example scandalous the or obscene content that any people who squeezes into phone of excision talks about in the hotline of program.

The sign indicating number that TV access and exit control equipment 15 produces or all insert the teletext signal by the sign indicating number that it received and be sent to the teletext editing system.Machine readable code can also be to show sign indicating number, perhaps can separately be sent in the diverse location that shows on the page or leaf or in expanding packet, they can relate to page or leaf, or do not relate to page or leaf, especially machine readable code can be inserted in the selected byte of bag 8/30 form 1, or wraps in selected three groups of 26.

Fig. 3 shows the content of modified bag 8/30 form 1, so that can allow machine readable code insert.Thereby, it comprises sign indicating number and byte by the clock of periodic duty and framing, they comprise recognizes its information as bag 8/30 form 1, has stipulated start page, network identification symbol, time migration, the solar calendar date and the Coordinated Universal Time(UTC) of revising, there are four bytes to use, according to the present invention, they are the classification sign indicating numbers that are used to send program, also have the demonstration of other byte specified states.

Four bytes provide 32, and they can be used for coded data.Wishing that the classification sign indicating number sends reliably, because if it is because the mistake of classification sign indicating number receives that program is interrupted, concerning the beholder, is extremely worried then, thisly goes out error protection and can reduce certainly and can be used to classification sign indicating number coded data figure place.A kind of according to embodiment of the present invention in, these four bytes are used to send 16 kinds of message digits, they are to be used as out 4/8 of error protection to breathe out bright coding.

A kind ofly distribute the proposal of these message digits as follows:

2 property contents that are used for whole program.

2 property contents that are used for a program individual case.

2 violent contents that are used for a program.

2 violent contents that are used for a program incident.

2 are used for a poignant incident of program.

2 vulgarisms that are used for a program are made peace.

4 indications that are used for the program source area.

Distribute two classifications that are used for every kind of programme content, allow to be provided with having four kinds of possible grades in specific.For example, sign indicating number 00 can show no such content.Sign indicating number 01 is low-grade content, and sign indicating number 10 is that the content and the sign indicating number 11 of medium grade is high-grade content.With regard to property and violent content, it is that the independent incident that is related in whole program and the program is thought useful that a kind of editor is arranged: for example, father and mother can determine, there is the program of low or medium property content rating to be watched, as long as the separate event of inclusive content is under an embargo by children.Like this, they can be provided with receivable program grade is 01, and they may wish to eliminate simultaneously the incident of sexual content simultaneously, and therefore the event code that is provided with in the program is 00, and same consideration is applied to the violent content in the program.The classification of painful content equally only is in the finite time in the program, is the details of performing the operation and being showed in the medical science program for example in the type of this content of considering.In this case, the beholder may medical skill very interested, rather than the misery of operation picture, other example that painful content may occur is in news or topical program, for example the nearest funeral parent's of interview people may make some people agonize, or shows the picture of the influence of famine or other disaster.The vulgar language content of program also is intermittent fully usually, therefore, forbids that with this whole program perhaps is unsuitable, and the occasion that vulgar language occurs can be pressed.

The area code of program source is useful, and there are different moral standards in different areas with country, and therefore, the content that may be classified to low-grade violence in an area may be classified to middle rank or even high-grade violence in another area.Same being advantageously applied to property of consideration content also can be used for content painful or vulgar language.Area code according to program source in receiver is revised being used for property, violence, and sign indicating number painful and vulgar language content is possible.Therefore, the property content of middle grade can be corresponding to high-grade property content in the area 2 in area 1.

For example, forbid that the program from given area also is possible for the reason of politics or religion.

UK Patent Application No.9619878.3 (PHB33410) discloses so a kind of method and system.The classification sign indicating number is the expanding packet that is inserted into the teletext signal therein, in specific bag 8/30 form 1.This expanding packet is not to relate to page or leaf, sends very frequently, in Britain, approximately is the interval in a second, when the TV receiver comprises a suitable decoder and control circuit, this be a kind of father and mother of realization control make things convenient for method., at present, in the suitable time, many mounted television receivers will not have control circuit, and still, great majority will comprise stylobate teletext decoder originally at least.

Therefore, the classification sign indicating number of each program provided by the invention also is inserted on the selected teletext page or leaf with displayable form, and in certain embodiments, a kind of machine-readable type interrelates with selected page or leaf.This exemplary embodiment discloses three kinds of possible forms can taking this contact.

In first example, be used to show and the classification sign indicating number that detected by control circuit has occupied preposition on the teletext page or leaf that is shown.Shown in Fig. 7 a, four kinds of classifications are arranged, language content just, property content, violent content, and age grading.These are positioned at row 20,21 all the time, 22 and 23 row 20 and 21.Therefore, control system can detect and decryption on these four positions, adopts this method, and the grade that is provided with according to the donor allows or forbids showing.This specific embodiment has shortcoming, and it has reduced editor's degree of freedom of page editing device, may limit the amount of the information that can show on page or leaf.

Second kind of embodiment has been shown in Fig. 3 b, and being expert at includes hidden character (cL) in 1 and is guide's classification sign indicating number.Row 1 often is shown as blank line; the main body of text is separated with the head section of page or leaf; in this case; can be used for comprising machine-readable classification sign indicating number and do not force great editor restriction, in addition, that sign indicating number is hidden; may take measures to increase the reliability of data; this is understandable, and in first kind of example, the classification sign indicating number is only protected by an independent parity bit.In example of the present invention, the value of classification can be used as through 8/4 data of breathing out bright check and sends, and the mistake of position can be detected and correct separately, and the mistake of dibit can be detected and get rid of.

Table 1 shows the rank value of embodiment 1, the transmission value, with the character that shows, this scheme is shown among Fig. 7 a, table 2 shows the rank value of embodiment 2, transmission value, and character display (not having hidden character), this scheme is shown among Fig. 7 b, and wherein these values are to adopt 8/4 to breathe out bright check back transmission.

Table 1

Rank value	4	?2	?5	?18
					The transmission value	34H	?32H	?B5H	?31H，38H
Character display
		4	?2	?5	?18

Table 2

Rank value	4	2	5	?18
					The transmission value	64H	49H	73H	?49H，02H

Character display

??d

??e

??s

1, green figure

As seen from Table 2, machine readable code no longer obtains being easy to the display result of visual interpretation.A problem of this scheme is that it may cause sending the sign indicating number of the effect that stops hidden attribute, for example green figure.A kind ofly prevent that this to cause the result's that control code is shown measure be to insert hidden attribute (sending a sign indicating number 98H) behind each character.

In the third embodiment, the machine readable ranked data is to send by three hytes in the expanding packet 26, and the advantage of this scheme is to have increased fastness, and avoids all editor's complexity.Because it can guarantee, machine-readable data will be by hidden, and the data in three hytes of bag 26 are breathed out plain code protected with 24/18, and it allows single faults to be recognized and proofread and correct, and double error is recognized and got rid of.Recently the enhancement mode fax text techniques standard of issue has many unappropriated three hytes.If row address three hytes with mould value 01110 are distributed in this function, then have 11 to can be used for ranked data.This embodiment can be used for expanding the PDC agreement of video tape recorder.In order to simplify the programming of VCR, teletext TV catalogue page transmits the readable data in the bag 26, it can be loaded into VCR, the data of playing in bag 8/30 form 2 in order to the identifier of stipulating current program are controlled recording of programs, ranked data is added the PDC data, when planning program recording, can check classification, and notify the beholder whether the classification of this program be to allow recording equipment forbid.

The 4th kind of possibility is distribution of machine sign indicating number in bag 8/30 form 1, and UK Patent Application No.9619878.3 (PHB34110) is proposed just for this, and with visible form machine readable code shown on selected page or leaf.As adopting other embodiment, one has a teletext decoder, but does not have control system can forbid the beholder that shows with classification that can the visual surveillance program, and whether decision is manually turned off television receiver or prevented to use the VCR record.

Very clear, the transmission of machine readable code and selected page or leaf are contacted directly, and this point is unimportant, and machine readable code for example, can send by expanding packet 8/30 form 1, and it is not related with any specific page or leaf, is to send on selected page or leaf although can show sign indicating number.In other embodiment, one has a teletext decoder, but be not used in the beholder that forbids the control system that shows whether classification and decision that can the visual surveillance program be manually disconnected television receiver or prevents to use the VCR record.Though between selected page or leaf and bag 8/30 form 1, directly do not get in touch, yet very clear, broadcasting equipment can be revised both simultaneously.

An advantage of distribution of machine code-reading is the equipment that some broadcasting authorities does not send expanding packet in showing page or leaf, and therefore, if they will play machine readable code, they must send in showing page or leaf.

Fig. 4 shows a kind of according to television receiver embodiment of the present invention with the form of block diagram.As shown in Figure 4, television receiver comprises an antenna 20, and it gives a common tuner 21 and IF and demodulator square frame 22 feeds.A kind of video and blank signal can obtain in the output of square frame 22, and are sent to a teletext decoder 23 and colour decoder 24.Adopt the output of decoder 24 to be sent to a video selector 25, it also receives from the shows signal output of teletext decoder 23 and from the teletext decoder and by one or 26 blank signal.

A kind of processor controls 27 is controlled the operation of television receiver in due form.Its receives the control command from remote control unit 28, and the beholder uses this unit to select specific display channel and selects other function, shows or on-screen menu shows as teletext.Processor 27 will be received in the sign indicating number that occurs bag 8/30 form 1, just representative incident, incident of violence, the sign indicating number of the content of painful incident or vulgar language from teletext decoder 23.These sign indicating numbers also deposit non-volatile memory 29 in, utilize remote control unit to squeeze into by the user, and setting can receive property, the violence of demonstration, the grade of painful or vulgar language content.The sign indicating number that processor 27 will receive is made comparisons with the sign indicating number of storage, and produces a signal according to output relatively on circuit 30, its by by or 26 deliver to video selector, and under suitable incident, make the video demonstration become blank.By circuit 31 signal is delivered to audio selector 32, and make audio frequency output quiet under suitable condition.

Audio selector produces an output, delivers to the voice band line by square frame 33 representatives, and loud speaker 34, and video selector 25 produces output, delivers to the video line 35 of standard, and display device 36.Audio selector 32 also has an input, send signal here by terminal 37, a kind of sound source of replacement can be linked on this terminal, for example, this can be a kind of tone producer, it replaces any undesirable word with a kind of " Bi-Bi " sound, perhaps it is linked on a kind of accessory channel, Audetel passage for example, provide alternative word to undesirable word, the Audetel passage is to propose to be used to provide sound to help the passage of signal, and it provides sight to describe, display screen or invisible at all people can not be clearly seen in help, and for example blind person or part eyesight person can catch up with program.Some idle capacity are arranged on this passage usually, can allow broadcasting equipment be possible undesirable word send and substitute word, perhaps in any program source for being encoded, because Audetel is invalid in that when dialogue is arranged.

Shown in Fig. 4 is a television receiver, yet the present invention can be applied to a video tape recorder equally well.In this case, audio ﹠ video selector circuit 32 and 25 output will be sent to the recording head of video tape recorder.So only there is the program of authorization code can be recorded on the video tape recorder, a kind of replacement scheme for video tape recorder is to allow to record the TV programme that receives, no matter with its associated classification sign indicating number how, but will write down on tape by these sign indicating numbers, so that when playback, television receiver can be to the output of video tape recorder to react with quadrat method to broadcast program, in this way, a program can be recorded the back and be watched for many different people, and each among them can have the admissible classification level different to specific content.Therefore, whole program can be passed through a television receiver playback, but is limited type for each.

Fig. 5 A-E illustrates the screen display order, makes the operator sign indicating number can be squeezed into television receiver.At first connect screen display, demonstrate the message of inviting the user to squeeze into personal identity number, doing like this is that the supposition mandate is to check with the method for PIN.PIN can notify user PIN number then by the burned memory of manufacturer, makes the owner can begin classification and selects.A kind of scheme of change is in factory PIN to be provided with to help zero, and a subprogram that is entered when being provided with in connection for the first time can change over PIN any number that the user wishes, therefore, when hope changes classification, requires on remote control unit by next key.This will draw on-screen-display messages, invite the user to squeeze into PIN, and this is as among Fig. 5 A shown in the screen 1.

The user squeezes into PIN then, if check is correct, next screen display has just occurred.This step is numbered 2 at Fig. 5 A.Originally, television receiver will be set to receive all programs, yet, utilizing the TV input-output control system, can select, whether there is certain class program to be excluded.That key of screen display guides user is pressed and can be continued this process, is red key in this example.The next screen that occurs, screen 3 is invited the user or is pressed green key, selection can received program category, perhaps press red key,, suppose that green key is pressed if wish to allow state remain unchanged, the 4th width of cloth screen has occurred, this step be invite user's decision whether the program of sexual content should be excluded, if such incident to get rid of, then please the user by a key, if incident is not excluded, then press different keys.Suppose that the user likes getting rid of some property content at least, so, screen 5 occurs, and this step will be asked the user to get rid of or be high-grade, and will be intermediate or senior, or the content of any grade, and in this specific example, the user selects only to get rid of high-grade content.In this specific example, select getting rid of is that the user of high-grade property content is determined whether just that by invitation this content should be excluded when such incident occurs, or all programs that comprise high-grade property content should all be got rid of.The user is please pressed red key once more in one case, in other cases by green key.So just finished layout to the property content.

Follow similar process for violent content, and be shown in screen 7,8 and 9. Screen 10,11 and 12 shows the process that painful content is got rid of.Under this specific situation, just get rid of incident rather than whole program that painful content occurs.It is generally acknowledged that painful content can not relate to whole program, and be the incident in the program.For example, so painful content can be the operation of showing in the medical program, the perhaps sight of the accident in news program or other disaster.These contingencies will be the sub-fraction of program.After these contingencies were partly eliminated, this program still can be appreciated.

A similar process is shown in screen 13 to 15, its can layout can received vulgar language content program, this is again only to get rid of specific incident rather than whole program, because the appearance of the undesirable word of possibility may only be the sub-fraction of whole program, if after especially having too much property or violent content to be excluded.Screen 16 and 17 is showed the programming of source area.If desired, it can make the user get rid of program from certain areas.For example, this may wish that a specific country is sending publicity materials, they may not comprise in the undue property perhaps violent content or or even painful content, or vulgar language, but the donor may wish to prevent to receive the program of such character.A kind of change usage to the source area sign indicating number is to revise being used for property, violence according to program source, the effective code of vulgarism speech perhaps in the misery.Therefore, from the A area, this may wish, the grade of receivable property content only is medium, because be considered to medium content in the A area, the area of installing at receiver may be considered to high-grade, the change of this sign indicating number can be to be programmed in the receiver regularly, or can be provided with by the user, and screen 18 is last screen that occurs, confirm the various selections that the user has been done, the content class of this screen and screen 2 seemingly, it occurs when entering input-output control system when finishing, therefore, finish in case be provided with, this will be displayed on the screen 2 in step subsequently.

Clearly, these on-screen-display messages only are to use for example, actual message can be adapted according to specialized market, yes with the language of television set the country one belongs to, processor controls, certain available multilingual stores various screen displays, therefore, makes a kind of common processor controls can be the television set service of selling in various country variants.

Several examples of shown on-screen message when Fig. 6 shows input-output control system work.Like this, first screen shows this program and can not obtain, and illustrates that this is because high-grade property content.This message certainly, will change according to the reason that specific program can not be obtained, by stipulating with its associated coding.Second screen shows because medium violent content makes TV become blank in the short time, and therefore, in the most of the time of program, demonstration can obtain, and see violent content but as seen show of short duration blank to prevent the beholder.The 3rd screen displaying situation is similar, because painful content makes and shows of short duration blank.The 4th screen shows Showing Picture of stack message, illustrates because vulgar speech is muted.

Thereby because the beholder is apprised of sound by of short duration quiet, he or she can not think that the sound channel of television receiver has fault.

In the specific examples of describing, user's authority can change the sign indicating number of having been finished by PIN.Yet, the method that also has other various users to be authorized to, a kind of possible method is the fingerprint detector, needs the user that his or her hand or finger are placed on the plate of detector for this reason, makes comparisons with the fingerprint that is stored in the receiver.This will be avoided any PIN to pass out of mind or PIN is known this class problem, for example, have a child to find PIN and reset the classification sign indicating number.Another kind of possible way is to comprise a gamma camera on receiver, watches the people's who wishes the change sign indicating number face.The output of gamma camera can be made comparisons with the image of storing at receiver memory, if meet, then allow to revise the classification sign indicating number.The two kinds of methods in back may be utilized, and for example, under the situation of a TV program receiver of personal computer adapted equipment, the process circuit of necessary fingerprint or face's identification usefulness can be in the personal computer circuit.

If they feel that some beholder may feel put about to the content of program or misery, the equipment of televising is notified suitable degree and the content of beholder about program usually immediately before beginning., if a beholder begins to watch program after program begins, he or she may not know that such warning or other information gave.

The teletext service comprises TV catalogue and the relevant material of TV program for project miscellaneous provides information.The teletext ISP usually also is TV program supplier, therefore, the knowledge that detailed TV programme content will be arranged can be part as the TV catalogue page about the suitable degree of a specific program and content, perhaps as the part that one page that is described in detail of a specific program is provided.Furtherly, when relating to current " broadcasting " program, it is possible sending this information on special page number, like this, the beholder only need remember that a page number checks the details of current program, no matter adopt any method, in the All Time of broadcast program, all can obtain the information of suitable degree and content.

The shortcoming that adopts special page number is the different page numbers that the beholder may remember each passage that he can receive.Moreover, this does not prevent that the ISP from reorganizing database and will warn the possibility that page is assigned on the different page numbers, also have no reason to look to the teletext server can agree to adopt identical page number, this perhaps can disturb them to adopt page number to set up editor's degree of freedom of upright database to certain classification and sections.Some teletext ISP can not choose the four corner of possibility page number.Their franchise and licence only provide to them and use certain page number.

A kind of possible solution is to deposit non-volatile memory in the receiver in being used for relevant page number to routing, but just need the beholder to operate, and, this may be difficult to finish with direct mode,, if this way has been implemented, as long as just can provide a kind of device that single RPB just can show page or leaf of pressing at any time to the beholder, and/or the TV receiver can be designed to like this, make to show page or leaf automatically behind each channel change, playback equipment from changing the loss that page number suffers the beholder but this still can not prevent.System also can be configured to like this, make page or leaf in transmission once (have only think just send issue warning the time) when playback equipment occurring automatically being shown, perhaps change makes an amendment according to program.Being provided with of modification control bit (C8) in the head section of page or leaf can be construed as denoting the sign that content has changed.

In present enhancement mode fax text techniques standard, stipulated a kind of teletext page or leaf-magazine catalogue page (MIP) of specific type.This page indicates the function and content of other page in the magazine that MIP is sent out.Page number (moo-mFF) for each three possible bit digital sends one eight place value (breathing out bright encoded byte as two 8/4 is sent out).Such type relates to warn the TV program (sign indicating number 7AH) of page or leaf.This be a single page (that is, not being the page or leaf of a scrolling) plan to provide one visible, the readable programme content and the indication of suitable degree.

A kind of suitable decoder can be sought the magazine catalogue page on each passage, and in non-volatile memory, write down the page number of the TV program that relates to warning page or leaf, therefore, do not need to look to customer interaction to come configuration-system, because comprise the passage of the MIP of proper data for broadcast, startup is automatically, can check periodic foundation on the interval whether the page number of storage is still effective.In case page number is established, any or all technology that the front was briefly described all can provide (the button access shows according to revising, and shows and shows according to channel change according to appearance).

Up to the present the system of being described provides on standard fax page of text about the suitable degree of a TV program and people's readable information of content.The present invention expands this, allows the confined program of coming in and going out.This just requires, and the machine-readable data that is sent out is the part as page or leaf in certain embodiments; but receiving equipment Be Controlled like this; machine-readable data should preferentially comprise error protection to guarantee reliable data, because if false blank occurs, the beholder at once can be very worried; such data can be stipulated the grade of all kinds programme content; for example, vulgar language, property; violent content, etc.In addition, can recommend one MINly to watch the age.Thereby, stipulate visible information with mode qualitatively.

The TV that ranked data can suitably be equipped explains that if the threshold value limit is exceeded, graphical display and sound can be under an embargo.In this way, father and mother can prevent that children from watching father and mother to think unfavorable specific program or program category.Further, in VCR, incorporate a kind of suitable decoder into, can prevent to record and think unfavorable program.TV or VCR have a kind of user interface, allow father and mother at first to squeeze into an identification code (PIN number), can be provided with or change threshold value then.

Before all TV and VCR receiver can be controlled in this way, also will there be the suitable time, yet, for many receivers provide the information of suitable degree and content as much as possible is desirable, comparablely in the visual description on the teletext page or leaf is easier to realize this point by the access and exit control data are linked to.

Machine-readable data can be added on the TV warning page or leaf in many ways.For example, sign indicating number (bag 1-23) as the display part of putting into page or leaf, or put into the expanding packet relevant (bag 24-28) with page or leaf, a kind of method in back may be more firm, strengthened preventing the transmission path mistake greatly because the encoding scheme that some expanding packet adopts is breathed out bright coding by use.Yet some transmission system can not transmit expanding packet, in this case, shows that usually the parity of the protected data of bag must adopt.

A kind of common teletext page or leaf uses bag 0 to transmit the control data of breathing out bright coding protection, and these data are various display properties of number of pages and page or leaf, and it also comprises the text at the top that appears at page or leaf; usually stipulate number of pages; date and ISP, but be with direct explicit form, add the local time.Thereby all the other contents that directly can show part of page or leaf are to send by wrapping 1 to 23, utilize the bag 24 that uses in some transmission plan, so that provide a kind of extra display line to simplify roaming around database.

A kind of by setting up to the consistent form of TV warning page or leaf, the position that is used to transmit the used various sign indicating numbers of different brackets can be prescribed, and where a kind of suitable decoder can be known read data and go on record so that determine whether that this program is allowed to appear on the TV screen or by VCR.In order to set up the form and the layout of page or leaf, realizing wishing very much among the present invention at a kind of enforcement rules that has between broadcaster and the producer.

In the example shown in following Fig. 7 a, the language grade can find in the bag 20 of row 21, the property content rating is in the bag 21 of row 21, the violent content grade reaches age grading in the bag 23 of row 20 and 21 in the bag 22 of row 21, in this embodiment, video data also is a machine-readable data, is not the additional code that must send.

Though this single system satisfies the basic demand of transmitting content rating, it needs certain page or leaf form certainly, and it has forced some editor's constraints, and this can not be accepted for all teletext ISPs.

As the expansion of suggestion, level data can be encoded on a given row.Because machine-readable data is not have what meaning for the beholder, it may wish that this row is empty like this, has many kinds of possibilities with forbidding that someway it shows:

Before sequence, insert the hidden sign indicating number of display control attribute, as think hopes, can use two hidden sign indicating numbers in succession with the increase fixing.

If page or leaf is that therefore level data need just not be shown based on initial box attribute with the format design of subtitle/news flash.

Background and foreground color are arranged to identical color.

Data are inserted in the row that is right after below the row that contains the double altitudes controlled attribute.

For the system of a reality, need a kind of rule of enforcement to come the regulation row, the possible method of the order of level data and hiding data.The editor that this method is forced retrains considerably less, than the scheme much less shown in Fig. 7 a.Except the row of appointment, any method tissue that the remainder of page or leaf can be wished by the editorial staff.

Adopt method for example, row 1 is shown as blank line usually, and the main body and the head section of page or leaf of text are separated, and can dispose for this purpose.Be expert at visible grade in 20 to 23 of Fig. 7 b explanation is how to be driven in the later sequence of the hidden controlled attribute (cL) of being expert in 1.

In this example, the value that adopts for specific grade is the value that is presented on the screen, if the sign indicating number that is sent out is to be displayed on the TV screen by the circuit that is used for the teletext decoder.

The value that is sent out: 34H 32H B5H 31H, 38H

Grade point 425 18

In addition, if selected encoding scheme needs, the available hexadecimal format of the value between 10 and 15 is represented (for example: A to F), and the value in 16 to 255 scopes can be represented by two hexadecimal code values.

It should be noted that the present embodiment allows to be filled up to full line in many types can be included in, new type can be added in the right-hand member of the sequence on nearest date, still keeps compatible with former decoder.

To the minimum requirements of page or leaf is the head section and the bag 1 of a page or leaf, and the even now beholder perhaps can be mixed, if perhaps adopt a kind of RPB of special use to select TV warning page or leaf, will be such situation when this page is shown to that the beholder watches.A replacement scheme is that without any the text of following, then it can distribute an existing units of number of pages that tens is also arranged if playback equipment is required to provide the discrepancy control data, and is configured to hexadecimal digit.A kind of enforcement rules can be stipulated this combination, the access and exit control data are promptly arranged but do not have the one page directly can show content, have single hexadecimal number page number can with one page with access and exit control data with can show content and recognize, but it is as the response to special-purpose RPB, channel change, it only is automatically selected that modification waits.Have only when the units of page number and tens all in 0 to 9 scope, by the common three-figure page of selection mechanism of squeezing into, all teletext beholders can directly obtain this page or leaf.

The embodiment of this modification satisfies the requirement of needed system, but can not think firmly especially, because the data that control is come in and gone out to program are only encoded by odd even protects, and allows one and makes mistakes and can detect but can not correct.Decoder should be designed to check the data that receive in succession separately, and is before current program grade finishes that the result is integrated.

Can be in the reliability of wrapping data of being distributed by sending as improving by 8/4 rank value of breathing out the data of bright check, single faults can be detected and proofread and correct, and double error is detected and gets rid of.Breathe out bright decode value and represent rank value.

Rank value: 425 18

Transmission value: 64H 49H 73H 49H, 02H

The character that shows: d I S 1, image is green

Notice that this no longer obtains the available visual display result of explaining.And this can cause sending the sign indicating number that stops hidden attribute effect, and for example image is green, and in order to overcome this point, if this is the method for selected hidden data, then hidden attribute (sending sign indicating number 98H) can insert after each element:

Rank value: 425 18

Transmission value: 64H, 98H 49H, 98H 73H, 98H 49H, 98H, 02H, 98H

Better simply decoder is not inquired the option of data and check when its adopts parity coding.They need to receive data and are applied to and consult, or on the reference table so that set up actual rank value, advanced decoder, on any byte, carry out handle with check be more flexibly, can carry out at once and breathe out bright 8/4 check.

In order to increase fixing and to avoid all editor's complexity.Because the machine readable ranked data guarantees to hide, therefore, data can send by three hytes in the expanding packet 26, and they are that editor's Kazakhstan is bright 24/18, allow single faults to be recognized and proofread and correct, and double error is recognized and got rid of.

Present enhancement mode fax text techniques standard has many unappropriated three hytes, for example, distributes to row address and has the mould value and can provide 11 to make ranked data for 01110 three hytes:

Address bit: 11XXXX N.B. is with two extreme higher positions 1

, guarantee that " row three hytes " are in sight

Mould value position: 01110

Data bit: XXXXXXX

More than use the scheme of bag 26 3 hytes to can be used to expand the PDC agreement, in order to simplify the programming of VCR, teletext TV catalogue page can transmit machine-readable data in bag 26, these data can be loaded among the VCR, the control program recording is together with bag 8/30, and the broadcasting of form 2 is to stipulate the identification of current program.Ranked data is added on the PDC data, and when the layout request, VCR can check classification, and notifies the beholder owing to the threshold value of Set For Current in VCR, and whether this program can go on record.

After having read disclosure material, for a person skilled in the art, other modification will be clearly, such modification can comprise other characteristics, they have been recognized in the design of television system and building block and in using, they can substitute the characteristics of having described and be used, and perhaps are used except describing the characteristics.Though claim has been done elaboration to the characteristics of specific embodiment in this application; should be understood that; the application's scope of the disclosure also comprises any combination in these disclosed new characteristics or new characteristics; they or significantly; or implicit; or any summary of one or more characteristics; this is obvious to those skilled in the art; no matter whether relate to and the identical invention of any claim of patent protection at present, no matter whether solved any or whole technical problems identical with the present invention.The application draws attention at this, in the application or in the implementation of the further application of deriving thus, the new claim of the combination of these characteristics and/or these characteristics may be set forth.

Claims (14)

1. one kind can make the donor allow the sound of a TV programme or its part and/or as seen show absent variable method according to programme content, and this method may further comprise the steps:

I) with the integral body and/or the moment content classification of a TV programme,

Ii) produce the grade that representative distributed code word and

Iii) these code words are believed with machine readable and form insertion that can show and the TV that shows program

In number multiplexed teletext signal.

2. a basis the process of claim 1 wherein that can show sign indicating number is displayed on the position of predesignating of a teletext page or leaf, and machine readable code is to produce the sign indicating number that can show sign indicating number on the position of predesignating.

3. a basis the process of claim 1 wherein that can show sign indicating number can freely place on a teletext page or leaf, and machine readable code is on the position of predesignating on the page or leaf.

4. method according to claim 3, wherein machine readable code conceals from show.

5. a basis the process of claim 1 wherein that machine readable code is comprised in the expanding packet relevant with the page or leaf that is shown.

6. method according to claim 4 or claim 5, wherein machine readable code is protected by a kind of error correcting code.

7. method according to any claim in front, wherein the classification sign indicating number is inserted into a current program page or leaf, but it comprises the display information that relates to the current program that is sending.

8. method according to claim 7, wherein the transmission frequency of current program page or leaf is increased when any change takes place the classification sign indicating number.

9. method according to claim 7 or claim 8, wherein the transmission frequency of current program page or leaf increases with classification level.

10. method according to any claim in front comprises providing the change word to replace thinking the step of unfavorable word for a selected classification level.

11. one kind makes the sound of TV programme and/or as seen shows absent variable method, this method may further comprise the steps:

Iv) set up the program or the authority of office partly that user's regulation can not occur,

V) will squeeze into storage in the television receiver with the corresponding code word of programme content of hope compacting

In the device,

Vi) receive a kind of method generation of patent protection in the claim that adopts any front

TV signal,

Vii) the code word that receives is compared with the code word of squeezing into and

Viii) sound and/or visible demonstration are not occurred according to result relatively.

12. a TV signal program source comprises: a teletext signal inserts equipment; According to the device of the programme content that transmits to the TV signal classification that will send; Produce the device of the code word of representing the classification of distributing to program or its part; With with code word can show the device that inserts the teletext signal with machine-readable form.

13. a record carrier comprises: represent the TV Festival destination data; Representative to the integral body of program and/or moment the content grade of being distributed the classification code word; With relevant teletext signal; Wherein code word is included in the teletext signal can show with machine-readable form.

14. television receiver; be suitable for receiving and the TV signal that shows from the record carrier of patent protection in the TV signal source of patent protection in the claim 12 or the claim 13; television receiver comprises a teletext decoder; extract the device of the machine readable code word of representing the classification that is assigned to the current program that receives; demonstration can show the device of classification sign indicating number; squeeze into the device of any program grade information of representative; this classification represents to wish to forbid the program that shows; device and foundation result relatively that the classification of squeezing into receive is compared allow or do not allow this program device shown.

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