CN1119022C

CN1119022C - Method and device for disabling sound and/or visual display

Info

Publication number: CN1119022C
Application number: CN97191708A
Authority: CN
Inventors: J·R·金霍恩; D·R·塔兰特
Original assignee: Koninklijke Philips Electronics NV
Current assignee: Koninklijke Philips NV
Priority date: 1996-09-24
Filing date: 1997-09-19
Publication date: 2003-08-20
Anticipated expiration: 2017-09-19
Also published as: GB9619878D0; JP2000501591A; WO1998014009A1; EP0864225A1; CN1208533A; KR19990071555A

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 an extension packet of 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. A system, programme source and receiver are also described.

Description

Be used to make sound and/or video to show the method and apparatus that lost efficacy

The present invention relates to according to programme content and forbid the method and apparatus that TV programme shows.

Passed through a kind of law in the U.S., the television receiver with the display on the certain size that requires all to be sold from 1998 must have the father and mother of making and can stop child to watch violence, property, and a kind of device of coded program such as dirty word.Advised so-called " V-chip ", it will monitor the code of launching with TV signal, and the program material of forbidding when code table is bright comprise the scene of violence, property or other to some audience be dislike or when not conforming to the material that is suitable for child, television receiver was lost efficacy.

In the V-of U.S. chip system, the broadcaster assesses each program with four examination types.The value of each type is transmitted simultaneously as the part of the extended data services (EDS) of closed circuit caption system (CC) then.As long as this program is arranged in the air, this value just is transmitted.

Utilize access control mechanism, father and mother are provided with thresholding for each type.If grade separation surpasses the value of authorizing in advance, the V-chip suppresses video and audio signal.Because the reaction of V-chip decoder almost is instant, this system easily treatment channel jumps.In addition, father and mother needn't fear missing in guide or at the content alerts of the beginning of program.

Electronic Industries Association (EIA) has defined four inspect-types and in order to transmit the quantity of the desired data bit of this code:

* the MPAA grade separation (be equivalent to separated film, for example 18, PG, or the like)-3 bits

* consulting rank-2 bit of violent content (it allow 0-3 grade)

* consulting rank-2 bit of property content

Consulting rank-2 bit of the content of * growing up.

Identical principle applies in Canada just in the system of on-the-spot test, and still, at present, both are different.

All U.S.'s television sets of manufacturing after in July, 93 must comprise provides the CC of subtitle decoder.Complete when being converted into-during text mode, current CC decoder (such as the SAA5252 decoder of being sold by the Philips semiconductor) can blanking TV picture.They also have sufficient display characteristic to produce the OSD menu, and father and mother can examine the thresholding programming for program like this.

Be different from teletext, at the playback duration of program, can be by VHS VCR record and the CC data of reproducing.Record and prerecorded tape also can comprise program inspection data like this.

In Europe, the problem of carrying out V-chip type system is totally more complicated than the North America.The broadcaster can't help a single government specifications, and the difference of culture and language means the difference of acceptable moral standards.Yet proposed to tackle the technical problem of the capable television system of 625-, had only a small amount of idle capacity to be used for extra data-signal in this system.

Significantly solution is to utilize American system, but this has some shortcomings.

At first, for the broadcaster, the CC signal will capture valuable teletext transmission capacity (will for good and all lose delegation), require the system of different codings simultaneously.

Secondly, it will be very expensive concerning employing meets the broadcasting station of the multiple transmission equipment of teletext and CC semaphore request and Data Bridge device (in cable amplifier).

The 3rd, will be with extra spending when consumer electronics manufactory provides teletext and CC decoding in for all television sets and PC TV card.

Making father and mother utilize broadcaster institute information transmitted to control TV is not new to the notion of watching of receiver, and has been proposed in the WO83 02208 that publishes June 23 nineteen eighty-three.People advise that code transmits via the teletext signal of launching with TV signal in that file, and this code forms the selected row number of given teletext page or leaf.

Like this, in the time might occurring offending incident, page number transmits in field blanking with capable number period.In receiver, when being transmitted when being, the teletext decoder for good and all is set up seeks relevant page or leaf, and identification row number.Specific row number shows the specific grade of audiovisual incident.

The target of invention is to guarantee that father and mother or other people output to this television receiver on television receiver carries out editting function.

The invention provides the people who makes mandate and can make the sound of a TV programme or a part and/or the method that Visual Display lost efficacy by programme content, the method comprising the steps of;

I) the whole and/or instantaneous content of classification TV programme,

Ii) produce the code word of the classification that expression distributed, and

Iii) with the expanding packet of teletext signal multiplexing of expression program in insert code word.

Utilize teletext to relay and pass on the advantage of code to be: in many countries, the infrastructure that the teletext signal is inserted in the signal of transmission has had, and a large amount of television receivers is equipped with the teletext decoder now.Therefore have requirement that the spectators of teletext service are provided, and in television receiver and program source also than the facility that is easier to additional a kind of editor.

Like this for sound and/or Visual Display were lost efficacy, the content of program supplier monitor programme, and the suitable indication of its content is provided by means of the code in the expanding packet that is inserted in a relevant teletext signal.The people of control television set can utilize this code to determine whether should the showing of such program (vision and/or by word of mouth) then.Pass on code by utilizing expanding packet, just needn't make the teletext decoder seek a specific transmission page, to carry out editting function, thereby the teletext decoder can continue to be engaged in all pages or leaves that searching is selected by spectators, for example, particularly selecting mixing text and picture or in " vision " function.

When the teletext signal is when defining as world's system television picture and text standard (World SystemTeletext Standard), expanding packet can be 8/30 form 1.

This wraps usually by the per second transmission primaries, thereby if desired, can change classification with the sort of speed easily.This makes the offending incident of occurrent possibility deleted in editing process, and can also watch this program generally.For example, news and topical program can comprise grievous or disagreeable scene, and such as the incident from area of war, they are parts relatively shorter in the whole program.In addition, bag can be transmitted more frequently, so that make the shorter incident can be deleted, such as a word.

This method can also comprise that the generation correction bits is in order to be inserted into the step in the bag with code word.In one embodiment, code word is protected by means of Hamming code, and this code word is 4/8 hamming code.

This safety of having guaranteed this Sort Code receives, therefore make because of such code word in transmission or detect the mistake that can not or allow to show that makes that mistake causes and reduce to minimum.

Each can utilize one or more criteria for classifications the code word that comprises dibit and be encoded, and a kind of independent standard can apply to whole program or apply to independent incident within the program simultaneously.This criteria for classification can comprise one or more in the following content: violent content, property content, grievous content, adult's language.

Utilize two bit codewords to allow for the sort of standard for each standard 4 possible ranks are set.For example, for the act of violence standard, code 00 will represent that violent content is zero, the low-level act of violence of code 01 expression, the medium rank act of violence of code 10 expressions, and the high-level act of violence of code 11 expressions.

One of code word can be represented the origin area of program, and the area of originating from simultaneously can be represented by four bit code.

The indication in the origin area of program is useful from the sensitiveness of Different Culture program.Therefore, a country or religious group are thought that disagreeable content may be not so just for another, thereby be useful according to the program source with to the possibility that the sensitiveness of the control authorities of TV is revised the implication of specific code.Can there be tolerance bigger or still less in some public organization for property or act of violence like this, and by the code of area of source is provided, this grade can correspondingly increase or reduce at the receiver place.

In an embodiment of this method, the expanding packet that comprises code word can be inserted into the beginning and/or the end of incident at nearest field blanking interval, and this incident changes the classification of the program that just is being classified.

Usually bag 8/30 form 1 about per second is transmitted once.For example, can be lost efficacy in order to make single word, this is accurate inadequately, but by bag also is transmitted at interval in nearest field blanking, single word will be within 20 milliseconds that disagreeable speech occurs, and this will guarantee that this word is suppressed.

Can replace with other word a selected category level is thought inappropriate word.

These words can transmit on an accessory channel, and for example the audio frequency that is proposed is assisted (Audetel) business, and it provides the audio frequency auxiliary signal, are used to describe the scene action.

The present invention further provides the method that the sound that makes TV programme and/or Visual Display lost efficacy, the method comprising the steps of;

Iv) set up and be used for determining the program that will lose efficacy or the subscriber authorisation of part wherein,

V) will be typed among the memory in the television receiver with wanting the corresponding code word of repressed programme content,

VI) receive the TV signal comprise code word, this code word is arranged in the expanding packet with the multiplexing teletext signal of TV signal, and this code word is represented the classification of program,

Vii) the code word that receives is compared with the code word that enters, and

Viii), sound and/or Visual Display were lost efficacy according to result relatively.

Utilize this method, can control some and have, child for example, the reception of inappropriate content TV signal potential spectators.Be equipped with the television set or the video tape recorder of the teletext decoder of the expanding packet that can detect and decode, can be used for classification according to the programme content monitor programme, if the user keys in the classification that needs inhibition, the device that is provided can make the output of television set or the writing function of video tape recorder lose efficacy so.

By keying in step I that people's identifier (PIN) one by one can finish this method v).Selectively or in addition, can finish step I of the present invention v) by monitoring donor's physiological characteristic.

Setting up a kind of fairly simple method of authorizing is the PIN that issue has only authorized users just to know.The PIN that is keyed in compares with the PIN that is stored (having only authorized users to know) then, if find to overlap, Sort Code can be updated so.

The shortcoming of utilizing PIN is that it can be forgotten by the user or be found by unauthorized user.Other example that requires complex apparatus more to implement is used for the physiological characteristic of supervisory user, fingerprint for example, and sound, facial characteristics, or the like.Utilize remote control can key in code word.

Remote control offers television set frequently, and offers the television set that can receive and show the teletext data unchangeably.They have a numeric keypad, and can be used to key in PIN, and provide other key, and its function can be used to key in desired Sort Code.

Information displayed on screen can be produced, so that help the key entry of code to word.

Thus, by means of continuous shown instruction with select to guide, can guide the step-by-step procedure of keying in relevant with different criteria for classifications code.

Information displayed on screen can be produced, and it informs the reason of spectators about sound or Visual Display inefficacy.

Show or sound when stopping that a kind of like this information will be avoided spectators to think making mistakes in the television set making.For example, this information can be such form: " owing to sound forbidden in adult's language ", perhaps " owing to grievous forbidding shows ".A kind of sound of forbidding can be with a kind of sound-substitution of preparation.

Like this, unwelcome speech or dialogue can be by " (bleep) screams " or other sound-substitutions.This will guarantee that spectators recognize that this is a controlled function, make this speech be under an embargo, and this speech is by noiseless replacement else if, and people can think what fault.The sound of this preparation can be determined by the signal that receives.

Like this, the scope of sound can replace original speech.For example, the sound of replacement can depend on the length of the dialogue that will replace.In further example, the non-disagreeable speech of preparation can be transmitted on an auxiliary passage, so that replace by the unallowed speech of selected classification.Preparation speech can be transmitted like this, for example, utilizes the capacity of any free time in the audio frequency auxiliary activities that is proposed.

The present invention further provides and comprise the TV signal program source, it comprises: the teletext signal inserts equipment; A kind of device is used for according to the programme content that is transmitted, and the TV signal that will transmit is classified; A kind of device is used to produce the code word of presentation class, and this code word is assigned in program or its part; And a kind of device, be used for code word is inserted within the expanding packet of teletext signal.

Many current TV signal source comprise the teletext inserter, and many professional suppliers include the device in order to the coding expanding packet, and they are irrelevant with page or leaf.

The teletext signal can be as defining in world's system television picture and text standard, and expanding packet can be bag 8/30 form 1.

This expanding packet was transmitted at interval with about one second usually, and irrelevant with page or leaf.It is by many teletext decoder decodes, and comprises the information relevant with the program supplier, and first page will be acquired, and real-time clock.According to the present invention, within this bag, there are four bytes to be used to transmit the program classification code.

Can comprise the device that is used for changing within period classification in single programs.

This makes this Sort Code to use in two ways.At first will stop and accept to be considered to unacceptable whole program, but next allows to watch a program will delete may be the nuisance part.The length of the incident that can get rid of depends on the frequency of the transmission of code.Wrap 8/30 form, 1 common per second and be transmitted once, therefore this incident can easily be deleted in several seconds.In addition, also can transmit additional bag 8/30, this will allow regularly immediate field blanking interval.

Can provide some device to correct the mistake of code word.Speech maya is protected by means of Hamming code.Code word can be 48 kinds of hamming codes.

By the error protection of code word, because mistake in transmission and forbid mistakenly or the program or the incident that allow to be presented within the program have reduced.

Code word can comprise other speech of level one or more in the following type of definition: property is expressed, violence, adult's language, sad image or sound.

These types can apply to sound or scene, and can apply to whole program or the separate event within program.For example news program can be described high level violence in specific report, such as the report that comes from the area of hostilities.They also can comprise sad content, for example because famine makes the picture of people's hunger.Other makes the object lesson of some people's grief be included in the demonstration to performing the operation in the medical science program.

This code word may further include the code word that shows the program area of source.

There are different regulations and example in different areas with country, and acceptable material may just not accepted in another different area in an area.Thereby Here it is why is considered to low-level violence in an area and is considered to a medium or high level violence in another area.

The present invention still further provides a record carrier, and it comprises: expression TV Festival destination data; Be expressed as the classification code word of the classification that the whole and/or instant content of program distributes; And a kind of relevant teletext signal; Wherein, code word is included in the expanding packet of teletext signal.

This has just guaranteed classification and control to the reproduction of media such as video tape of prerecording or CD, the people that these medium may be authorized to buy does not want to allow and watches the people that sees to buy, that is, father and mother may consider that its child oneself chooses these inappropriate audio-visual-materials.If the method classification of record carrier as broadcast material, the identical control that then can when they watch broadcast material, carry out.

The teletext signal can meet world's system television picture and text standard, and expanding packet can be bag 8/30 form simultaneously.

The teletext signal can transform into a multilevel code so that reduce the bit frequency of teletext signal, and this moment, record carrier can be the VHS video tape.

As everyone knows, can not utilize VHS video tape recorder reliable recording usually and reproduce the teletext signal, this is because its bandwidth restrictions.Done various suggestions and overcome this problem, one of them is to disclose in EP-A-0608960 (PHB 33832).In the sort of application, delegation's teletext data expand to 5 row of field blanking interval.As a result, all teletext data can not be stored, and when record, these data must be selected.

One of usage of this arrangement is the subtitle that record is used for deaf people, their transmission on the 888th page usually.Also have living space, be used for record sort code in an identical manner, but this will, certainly, further restriction needs any other teletext information of record.

Another suggestion at record television image, text and data on the VHS tape has disclosed in GB Patent Application No. 9605614.8 (PHB34056).In this suggestion, the teletext signal transforms into a multilevel code with low frequency more.This has guaranteed that the teletext data of all transmission can utilize the VHS recorder to store and reproduce, thereby, can be used for guaranteeing that the Sort Code in expanding packet can be stored on the tape.

Further object of the present invention provides television receiver, and it is used to receive and shows TV signal from this TV signal source or record carrier, and this television receiver comprises: the teletext decoder of the expanding packet of the teletext signal of can decoding; A kind of device is used to extract the code word of classification that the program of current reception is distributed in expression; A kind of device, in order to key in the information of any program classification of expression, it represents that the program of which demonstration will be under an embargo; A kind of device, in order to the classification of relatively keying in and receiving, and a kind of device is in order to allow program to show according to result relatively or program was lost efficacy.

Like this, key in to television receiver with the program or the corresponding code of this program part of needs inhibition.Corresponding code receives via the teletext expanding packet, and the demonstration and the audio frequency output of receiver is controlled so that guarantee with the code comparison of being keyed within receiver.By in the teletext expanding packet, comprising code, just there is no need to make the teletext decoder for good and all to seek specific page or leaf.Replace the teletext decoder to finish the normal function that obtains user-selected page or leaf, this decoder will automatically obtain and the irrelevant expanding packet of page or leaf.

Authorization device can be provided, be used for only allowing a licensee to key in program classification.

Authorization device can comprise: in order to keying in the device of PIN, in order to a PIN that is keyed in and a device that the PIN that is stored compares; And in order to allow to key in the device of program code, if the PIN with being keyed in of storage is identical.

This just provides a kind of easy safety device, is used to guarantee: the people who only is authorized to, for example father and mother can change Sort Code.Yet its shortcoming is that this code can pass out of mind or compromise.Under first kind of situation, it is difficult changing classification, and under second kind of situation, uncommitted people can change classification.

Selectively, authorization device can comprise: device, in order to monitor the people's who authorizes physiological characteristic; Device is in order to store the feature of being monitored; Device is in order to the content of the acceptable program of request change; Device is in order to monitor in response to requested feature; Device is in order to compare the feature with being stored of monitoring; And device, in order to allow to be altered to acceptable programme content when the correct comparative result.

Various physiological characteristics can be used, fingerprint for example, facial characteristics.

Fingerprint detector is used to trust card at point-of-sale terminal site place check is well-known.

A kind of device of discerning facial characteristics is disclosed among the EP-A-0551 941 (PHB33765).

The advantage of utilizing physiological characteristic is forge very difficultly, and needn't keep PIN or other external data firmly in mind.

Such device can be provided, to produce information displayed on screen, notify spectators why sound and/or show lost efficacy.

When program can not receive or because its classification and when being cut off, this has just stoped spectators to think to make mistakes in receiver.

Such device can be provided, be used for replacing inappropriate speech with the audio signal of a preparation.The audio signal of preparation can be represented other consentient speech.The part that the speech of this preparation can be used as TV signal is received.

Like this, for example, just replace with the piping signal in the place that disagreeable speech takes place.Selectively, they can be replaced by other speech without demur.A kind of method of finishing this task is to utilize an accessory channel, wherein the speech of program generator transmission preparation.The audio frequency accessory channel that an accessory channel that can be utilized is suggestion, this passage are people's transmission of audio supplementary of blind person or part eyesight.

Such device can be provided, if do not receive any Sort Code in TV signal, this device can make sound and Visual Display lose efficacy.

This has guaranteed the reproduction of the program that is not classified is controlled.This can be because their age perhaps derives from non-sources of law because of video tape.Especially, highly contentious tape can need not the respective classified code and be produced.

By with reference to the accompanying drawings the embodiment of the invention being described below in conjunction with example, above-mentioned purpose of the present invention and advantage will be clearer, wherein:

Fig. 1 has shown the television system of carrying out method of the present invention;

Fig. 2 has shown the schematic block diagram according to formation tv programme source of the present invention;

Fig. 3 has shown the plan that is used for the code word of program classification, and this code word is inserted in the teletext expanding packet.

Fig. 4 has shown the schematic block diagram that forms television receiver according to the present invention;

Fig. 5 illustrates the process to the television receiver programming, so that it is according to method work of the present invention; With

Fig. 6 illustrates information displayed on screen possible when this method is called.

Fig. 1 is the block schematic diagram of system, and wherein the method according to this invention can be carried out.In the shown system of Fig. 1, comprise TV signal source 1, television transmission medium 2, and a plurality of television receiver 3-1 to 3-n.The TV signal program source can be a kind of common television broadcast device, and terrestrial broadcasting or satellite broadcasting can be the program source of cable television network.Tv programme source comprise the teletext inserter with in order to the program classification code is keyed in the device to the expanding packet of teletext signal.Transmission medium 2 can be taked any form easily, and for example it can be a radio wave, as the broadcasting of ground broadcast transmitter or satellite transmitter, or the cable system of cable television system.Television receiver 3-1 to 3-n is connected with program source via transmission medium 2.May program source 1 be video tape or the optic disk that record has program in addition, to be reset by video tape video tape recorder or video disc projector, wherein transmission link 2 can be tape recorder or optic disk projector and a cable that tape recorder or optic disk projector are connected with television receiver simply.

Embodiment according to TV signal program source of the present invention is shown with the block schematic diagram form in Fig. 2.Tv programme source comprises video source and audio signal 10, for example can be television camera, and its video output is fed to via teletext inserter 11 and relays network 12.Be fed to another input of transmission network 2 via circuit 13 from the audio frequency output of TV signal source 10.One existing-quality television video text editing system 14 is connected with teletext inserter 11, and has from another input of TV access control equipment 15 feed-ins.

TV access control equipment 15 is arranged to such an extent that can be inserted in the expanding packet of teletext signal code word, and this code word is classified to the content of the TV programme that produced by signal source 10.TV access control equipment 15 has first input end 16, and it receives data from the TV programme dispatching patcher.For example this data provide the complete indication of the content of program, and it can be used for forbidding the demonstration of that program on receiver.Information for example can be determined violence, the property content, and the rank of adult's language or sad content, these contents can betide among the program.

TV access control equipment 15 has second input 17, and it receives data from the material that writes down in advance.Recording materials can comprise that the code of classifying content appears during the program in indication in advance, also can be included in the instant data of classification particular event during the program.Keyboard or other input unit 18 are connected with another input 15 of TV access control equipment.This is typed into operation in the real program with regard to having guaranteed the operator with suitable classification code.Certainly, be necessary period, so just allow the operator key in suitable code at reasonable time with a weak point of actual transmission delay of this program.Such transmission delay is well-known for Live Program, and it makes broadcasting authorities can delete any unwanted incident.For example in the live phone of program, deletion is by throwing said any the slandering or filthy content of phone people into.

That produce by TV access control equipment 15 or by it receive and code that lead to the teletext editing system, be inserted into then in the expanding packet of teletext signal.Particularly, they can be inserted in the selected byte of bag 8/30 form 1.

Fig. 3 is shown as the content of bag 8/30 form 1 that the present invention can be carried out and revise.Like this, it comprises that clock inserts cycle and frame code and byte, and these bytes comprise the information that is used for following purpose: determine that it is that bag 8/30 is as form 1; The definition initial page, Network Recognition, julian date is revised in time migration, and the generalized time of agreement.According to the present invention, the Sort Code that is used to transmit program has 4 bytes to use.There is other byte to be used for the definition status demonstration.

Four bytes have provided 32 bits basically, and they can be used for coded data.Require to send reliably Sort Code, because if owing to the mistake to Sort Code receives program is cut off, it can greatly worried spectators.This error protection certainly, will reduce the quantity of the data bit of available code Sort Code.In an embodiment according to the present invention, four bytes are used for transmitting 16 information bits, and they are 4/8 Hamming codes, are used for the error protection coding.Be used to distribute the suggestion of these message bit as follows:

2 bits are used for the property content of whole program;

2 bits are used for the property content of each incident of program;

2 bits are used for the violent content of a program;

2 bits are used for a program incident of violence content;

2 bits are used for a sad incident of program;

2 bits are used for the program language of being grown up;

4 bits are used to indicate the program area of source.

For every programme content classification distributes dibit just can allow four possible ranks to set concrete content.For example code 00 meaning does not have the content of those types, the low-level content of code 01 expression, code 10 other contents of expression middle grade, and the high level content of code 11 expressions.For each incident in whole program or the program is that property or violent content are encoded, and is considered to useful.Therefore, for example, father and mother can determine the program with low or semi-polarity content to be watched by children, as long as the individual case of inclusive content has been under an embargo.Like this, they will be set to 01 to acceptable program level, and they wish to remove the incident of sexual content, and therefore the incident that is provided with in this program code is 00.Identical consideration item applies to violent content within program.Sad classifying content probably is limited only within the limited period within the program.The content of these types considered here is like an elephant some details in the medical science program that is showing operation.In this case, spectators can be to the interested people of medical technology, but can find that the operation of being described is sad.Other example that grievous content occurs can occur in news or the topical program.To not long ago dead people's visit, be sad for some people for example, some show that the picture of famine or other calamity effect also is sad.Adult's language content also will be quite intermittently usually in the program, thereby we consider that it perhaps is unsuitable depriving whole program on such basis, because the situation that adult's language takes place can be suppressed.

Program area of source code is considered to useful, and wherein different zones has different moral codes with country, thereby is classified as the content of low-level violence in an area, perhaps is classified as high level violence in another area.Identical consideration is applying to property content fully, and content grievous or adult's language.This just might be in receiver revises property according to program area of origin area code, violence, the code of sad and adult's language content.Therefore, low-level property content can be corresponding to area 2 middle-and-high-ranking other property contents in area 1.

Also just may forbid program, for example for the reason of politics or religion from given area.

Fig. 4 has shown the block diagram of the embodiment of television receiver formed according to the present invention.As showing among Fig. 4, television receiver comprises an antenna 20, and it inserts conventional tuner 21 and IF and demodulator square frame 22.Composite video and blanking signal can obtain at the output of piece 22, and provide to teletext decoder 23 and color decoder 24.The output of color decoder 24 provides to video selector 25, and video selector 25 also receives from the shows signal of teletext decoder 23 output, and from teletext decoder 23 via or a blanking signal of door 26.

Processor controls 27 is controlled the operation of television receiver in a usual manner.It receives the control command from remote control 28, and spectators utilize remote control 28 to select a specific channel that is used to show, and select other function, shows or upward menu demonstration of screen such as teletext.Processor 27 will receive codes from teletext decoder 23, and it occurs to wrap 8/30 form 1, i.e. this coded representation sexual behavior part, incident of violence, the content of grievous or adult's language.It will store such code within non-volatile memory 29, it utilizes remote control to key in by the user, its setting property, violence, grievous or adult language content rank, these contents can show.Processor 27 will be compared the code that is received with the code of being stored, and according to producing a signal in this output online 30 relatively, it via or door 26 be provided video selector 25, and under suitable environment, make video show blanking.Also will provide a signal to audio selector 32 via circuit 31, it is quiet that it will make audio frequency output under suitable environment.

Audio selector is provided to standard audio circuit and the loudspeaker of being represented by square frame 33 34 with an output, and video selector 25 produces an output, is provided to normal video circuit 35 and display unit 36.Audio selector 32 has another input, and from terminal 37 inputs, another audio-source can be connected on this terminal.For example, it can be a tone generator, and it replaces any disagreeable speech with piping, and perhaps it can be connected to an accessory channel, and for example the audio frequency accessory channel thinks that disagreeable speech provides alternative speech.The audio frequency accessory channel is to be proposed to be used in the passage that the audio frequency auxiliary signal is provided, and it provides the description of scene so that help can not be clearly or cannot see the people of display screen fully, and the people of for example blind or part eyesight is to the understanding of program.Usually some idle capacity are arranged on this passage, make the broadcaster can launch the alternative speech that replaces disagreeable speech, maybe will substitute Chinese word coding in any program source, when having dialogue, audio frequency is auxiliary with occupied with nothing.

Fig. 4 has shown television receiver, but the present invention can similarly apply to video tape recorder.Under the sort of situation, Voice ﹠

Video selector circuit

32 and 25 output will be provided on the magnetic head of video tape recorder.The program that like this, only has the code of mandate will be recorded on the video tape recorder.A kind of other structure of video tape recorder is to allow TV that record received to program, no matter and what the Sort Code relevant with it be, but, just can work to the output of video tape recorder in the mode identical with broadcast program writing down those codes so that on television receiver, reproduce on the tape.By this method, program can be recorded, and is watched by some different people, and everyone has the category level of different tolerances to certain content.Like this, whole program can be reset by a television receiver, is a kind of restricted version when still watching by another television set.

Fig. 5 A-E explanation screen is gone up display sequence, and it can key in code to television receiver the people.When initial condition is opened, show the information of releasing on the screen, this information invites the user to key in individual's identifier.Suppose by means of this mandate of PIN and be examined.PIN can be burned in memory by the producer, and the producer informs then that owner's starting is to the selection of classification like this this PIN of the buyer number.Another kind of way is in factory PIN to be set to zero, and keys in when this machine is started shooting first, becomes any number of customer requirements with change PIN., when needs change divide time-like, need to press a key on the remote control for this reason thereafter.This has just released information displayed on screen, and it invites the user to key in PIN.Shown as the screen among Fig. 5 A 1.

The user keys in PIN then, and is correct if it is checked as, and shown on the next screen.This is denoted as numeral 2 in Fig. 5 A.At first, television receiver will be set to and receive all programs, but by utilizing the TV access control system to select, to get rid of the program of some type.Which key the idsplay order user pushes so that the continuation process is red key on the screen in this example.The next screen that is occurred, screen 3 is invited the user to push the type of green key with the program selecting to receive, or is pushed red key, if he wishes to keep this state.Suppose that green key has been pressed, then the 4th screen occurs.Whether this program of inviting user's decision to contain sexual content should be got rid of, and invites the user to push a button, if this thing will be got rid of; And push different buttons, if this thing is not to get rid of, suppose that the user does not want to get rid of some property contents at least, screen 5 occurs so.This will invite the user to get rid of any low level, moderate or high-level or any other content of level.In this specific example, the user selects only to get rid of high level content.Whether in this specific example, the user once selected only to get rid of high rank content, and have only when incident takes place the user of invitation to indicate these contents and should be got rid of, and comprised perhaps whether all programs of high-level property content should be got rid of fully.Again, the user is pushed red key by invitation in an example and is invited in other example and push green key.This has just finished the programming to the property content.

A similar process is used for violent content, and is displayed on

screen

7,8 and 9.

Screen

10,11 and 12 has shown the process of guaranteeing to get rid of grievous content.Under this specific situation, only getting rid of wherein has the incident of grievous content not get rid of whole program.This is to consider that grievous content is not likely relevant with whole program, and just relevant with the incident within the program.Sad content so for example can be the operation demonstration in the medical science program, or the scene of the accident in the news program or other calamity.These incidents will only be fractions of this program, and those incidents deleted after, can appreciate this program.

A similar process is shown in screen 13, and it can guarantee the programming to the content of acceptable adult's language.Again, this has only got rid of particular event rather than whole program, and this is because the very possible only sub-fraction of program as a whole of contingent disagreeable speech has the excessive property or the program of violent content if especially got rid of.The programming of

screen

16 and 17 explanation program areas of source.If desired, it makes the user can refuse program from certain areas.This is reasonably, specific country's transmission publicity materials for example, and it can not comprise in the excessive property perhaps violent content or grievous content or adult's language, but the people who authorizes wishes to stop the reception of the program of this character.

The Another application of area of source code is according to this program source property revised, violence, the valid code of grievous content or adult's language.The program that comes from regional A can need, and the rank of its acceptable property content is medium rank, for no other reason than that it is considered to medium at regional A, and is considered to high-level in the area at receiver place.The change of this code can for good and all be programmed in receiver or can the user be set.Screen 18 is the last screens that occur, and confirms the selection by the user did.This screen classes is similar to the content in the screen 2, and when when access control system is keyed in content, it has occurred.Like this, in case be provided with, in the access of back, this will be presented on the screen 2.

Clearly, these information displayed on screen just are used for case illustrated, and actual information is decided by concrete market, should be the language of receiver country of living in certainly.Certainly, processor controls can be shielded upward displaying contents with a plurality of different language storages, and the user can carry out speech selection when these screens of visit are gone up demonstration, and this just guarantees that the general controls processor can be used in the machine of selling at country variant.

Fig. 6 shows the example that shields the information of going up when access control system is worked.Like this, the first screen display program can not use, and illustrates that it is because high level property content.Certainly,, will change, and determine by associated coding according to this information of this reason for the impracticability of specific program.Second screen shows that TV is owing to medium violent content and by instantaneous blanking.Like this, during most of programs, show it to be spendable, but Visual Display has instantaneous blanking, watches violent content to prevent spectators.Shown like the 3rd screen classes that instantaneous blanking shows owing to grievous content.The 4th screen shown the image of the information that superposeed thereon, and its explanation is because adult's speech has been prohibited sound.Thereby because spectators are apprised of sound by instantaneous taboo sound, he or she will can not think that this is the error of the sound channel of television receiver.

In specific example, described by means of the PIN subscriber authorisation and can change coding.Yet various other method is arranged, and wherein the user can be authorized to.A kind of possibility will be the fingerprint detector, and the user just must be placed on its hand or finger above the liner of detector like this, and it compares this fingerprint and the fingerprint that is stored in the receiver.The problem that this will be avoided any PIN of forgetting or comprise PIN, for example a child has found PIN, and resets Sort Code.Another possibility is to be to comprise a video camera at receiver, and it will check the people's who wishes to change code face.The output of video camera can be compared with an image of being stored within receiver, if find to overlap, can allow to upgrade Sort Code so.For example when personal computer was suitable for television program receiver, back two kinds of methods can be used.Within the personal computer circuit, needs are used for the necessary processing circuit of fingerprint or surface identification.

By within expanding packet, comprising Sort Code, in this specific example, be bag 8/30 form 1, the teletext transmission of specific page can take place simultaneously with the monitoring of Sort Code.For example, when watching TV programme, the visual page of teletext signal can be presented at information above the screen sometimes, the nearest score of football or kick off for example, and this will not be capable of being monitored, if categorizing system requires to monitor specific page for this Sort Code.Under the sort of situation, the passage of at least two acquisitions must be arranged in the teletext decoder, for good and all distributed to the Sort Code page or leaf for one.By using expanding packet, just needn't use the passage of a specific acquisition for good and all to distribute to the Sort Code transmission.

From read process of the present disclosure, other is revised for those of ordinary skill is tangible.Such correction can comprise other characteristic, they the design of television system and part with use in be known, and can be used for replacing or appending on the characteristic of having described.Though in application, in the concrete combination of feature, illustrated claim, the application's open scope also comprises any novel feature that the feature of clearly or implicitly describing is carried out or the combination of novel feature here, these perhaps one or more combination of features are tangible for those of ordinary skill, no matter whether what occur in any claim is identical invention, and whether it alleviated any or all constructed problem, and it all is the present invention.Therefore the applicant provides bulletin: implement should with or during other application of its generation, new requirement is used to describe these features and/or these combination of features.

Claims

1. one kind makes the people of mandate make the sound of a TV programme or a part and/or the method that Visual Display lost efficacy by programme content, and the method comprising the steps of;

I) the whole and/or instantaneous content of classification TV programme,

2. according to the method for claim 1, further comprise step: produce the error correction bit that is used for being inserted in the bag that has code word.

3. according to the method for claim 2, wherein this code word is protected by means of Hamming code.

4. according to the method for claim 3, wherein this code word is 4/8 hamming code.

5. according to the method for top any one claim, each can utilize wherein one or more criteria for classifications the code word that comprises dibit and be encoded.

6. according to the process of claim 1 wherein that one or more classification apply to whole program.

7. according to the process of claim 1 wherein that one or more classification apply to the separate event within the program.

8. according to the process of claim 1 wherein that criteria for classification can comprise one or more in the following content: violent content, property content, grievous content, adult's language.

9. according to the process of claim 1 wherein that a code word represents the origin area of program.

10. according to the method for claim 9, the area of wherein originating from can be represented by four bit code.

11. according to the process of claim 1 wherein that the teletext signal meets world's system television picture and text standard and expanding packet is bag 8/30 form 1.

12. the method according to claim 1 comprises step: at nearest field blanking interval, the expanding packet that will comprise code word is inserted into the beginning and/or the end of incident, and this incident changes the classification of the program that just is being classified.

13. the method according to claim 1 comprises step: provide the word of preparation to replace a selected category level is thought inappropriate speech.

14. one kind makes the sound of TV programme and/or the method that Visual Display lost efficacy, comprises step:

Iv) set up user's authority, which will lose efficacy to determine program or part wherein,

Vi) receive by the TV signal that method produced in top any one claim,

Vii) the code word that receives is compared with the code word of key entry, and

Viii) sound or Visual Display were lost efficacy according to comparative result.

15. according to the method for claim 14, step I is v) finished this method by keying in one by one people's identifier (PIN).

16. according to the method for claim 14, wherein step vi) is to finish by the physiological characteristic that monitors the licensee.

17., wherein utilize remote control to key in this code word according to any one method of claim 14-16.

18., comprise step: produce information displayed on screen, so that help the key entry of code word according to any one method of claim 14-16.

19. according to any one method of claim 14-16, comprise step: produce information displayed on screen, it informs the reason of spectators about sound or Visual Display inefficacy.

20., comprise step: with a kind of sound of forbidding of a kind of sound-substitution of preparation according to any one method of claim 14-16.

21. according to the method for claim 20, wherein, the sound of this preparation is determined by the signal that receives.

22. device that produces the TV signal program source: comprise that the teletext signal inserts equipment; A kind of device according to the programme content that is transmitted, is classified to the TV signal that will transmit; A kind of device is used to produce the code word of presentation class, and this code word is assigned in program or its part; And a kind of device, be used for code word is inserted within the expanding packet of teletext signal.

23. according to the device of claim 22, wherein the teletext signal is the same with world's system television picture and text standard, and expanding packet is bag 8/30 form 1.

24. according to the device of claim 22 or 23, comprise such device, so that change classification within period in single programs.

25., comprise the device of correction code character error according to the device of claim 22.

26. according to the device of claim 25, wherein code word is protected by means of Hamming code.

27. according to the device of claim 25, wherein code word can be 4/8 hamming code.

28. according to the device of claim 22, wherein code word comprises other code words of level one or more in the following type of definition: property exposure, violence, adult's language, sad image or sound.

29. according to the device of claim 28, wherein code word further comprises the code word that shows the program area of source.

30. television receiver, it is used for receiving and shows that this television receiver comprises: the teletext decoder of the expanding packet of the teletext signal of can decoding from the described TV signal source of claim 22-29; Be used to extract expression and distribute to the device of code word of classification of the program of current reception; In order to key in the information of any program classification of expression, it represents the program device to be prohibited of which demonstration; Device in order to the classification relatively keying in and receive; And, in order to the device that allows program to show or program was lost efficacy according to result relatively.

31. the television receiver according to claim 30 comprises authorization device, is used for only allowing a licensee to key in program classification.

32. according to the television receiver of claim 31, wherein authorization device comprises: in order to key in the device of PIN; In order to the PIN that is keyed in is compared with a PIN who is stored; And if the device of keying in program code in order to the identical permission of the PIN with being keyed in of storage.

33. according to the television receiver of claim 31, wherein authorization device comprises: the device of the people's who authorizes in order to monitoring physiological characteristic; In order to store the feature of being monitored; Change the device of the content of acceptable program in order to request; In order to the device of monitoring in response to requested feature; In order to the device that the feature with being stored of monitoring is compared; And in order to allow to be altered to the device of acceptable programme content when the correct comparative result.

34., comprise such device according to any one television receiver among the claim 30-33, be used to produce information displayed on screen, notify spectators why sound and/or show lost efficacy.

35. according to any one television receiver among the claim 30-33, comprise such device, be used for replacing inappropriate speech with the audio signal of a preparation.

36. according to the television receiver of claim 35, wherein Yu Bei audio signal is represented other consentient speech.

37. according to the television receiver of claim 36, wherein Yu Bei speech is received as the part of TV signal.

38. according to any one television receiver among the claim 30-33, comprise such device, if do not receive any Sort Code in TV signal, this device lost efficacy sound and Visual Display.