CN101990129A - Receiving system and method - Google Patents

Abstract

The present invention discloses a receiving system. The receiving system has a data screening mechanism, which includes a receiving unit, a processing unit, a storage unit, a user interface, and a judgment unit. The receiving system uses its storage unit to store multiple hierarchical windows, and provides a function of editing the hierarchical windows for users to set arbitrarily, so that users have considerable convenience in application.

Description

Receiving system and method

technical field

The invention relates to a video system, in particular to a video system with a data filtering mechanism.

Background technique

The screen of the receiving system 10 of the known display device (TV program filtering system) is used to provide parents with a setting and control mechanism for allowing (Allow) or blocking (Block) TV programs, so as to properly manage the viewing habits of children or teenagers, Prevent programs such as violence and pornography from affecting the physical and mental development of children or adolescents. For example: the known receiving system 10 divides the program into several grades according to the rating table 11 provided by the channel, such as: TV-Y for all age groups, TV-Y7 for those over seven years old, TV-G for seven to fourteen years old, TV-G accompanied by parents PG, TV-14 over 14 years old, and adult TV-MA are for parents to choose or set, wherein, each level is used to illustrate the appropriate age group of viewing objects. However, different countries, different regions, or different TV stations may have different rating tables and different rating systems. For example, when the channels of two different TV stations have two different rating tables and different rating systems, the known receiving system often must When receiving channel signals, the rating tables and rating system data of the received channels are reprocessed. In this way, there will be problems such as power consumption, inconvenience in operation, and system processing speed reduction.

Contents of the invention

In view of the problems referred to above, one of the purposes of the present invention is to provide a receiving system (parent-child lock protection system), which can store a plurality of rating tables, without repeatedly processing the data of different rating tables or different rating systems, and can achieve reduction Efficiency that consumes power or reduces the processing speed of a system.

One of the objectives of the present invention is to provide a user interface of the receiving system, which allows the user to edit the rating table and the data of the form.

One embodiment of the present invention provides a receiving system with a data screening mechanism, which includes a receiving unit, a processing unit, a storage unit, a user interface, and a judging unit. The receiving unit receives a first signal from a first channel and a second signal from a second channel through a transmission channel, wherein the first signal includes a first video signal, a first classification data and a At least two of the first grading window, and the second signal includes at least two of a second audio-video signal, a second grading data and a second grading window. The processing unit processes the first signal according to at least one of the first hierarchical data and the first hierarchical window, processes the second signal according to at least one of the second hierarchical data and the second hierarchical window, and generates corresponding A first classification table and a second classification table of the first signal and the second signal, wherein the first classification table and the second classification table respectively include a plurality of classification fields, and each classification field includes a plurality of classification levels . The storage unit is used for storing the first classification table and the second classification table. The user interface is used to provide the user to set at least one of the grading fields and at least one of the grading levels in the first grading table and the second grading table.

The judging unit judges whether the first audio-visual signal and the second audio-visual signal are displayed on a display device according to a channel selection signal, the first rating table and the second rating table.

One embodiment of the present invention provides a parental lock protection system, which includes a storage unit, a user interface and a control unit. The storage unit stores a plurality of classification tables, and each classification table contains at least one classification data and/or a classification window information of a channel signal, and each classification table is planned as a plurality of classification fields, and each field contains multiple levels.

The user interface receives the rating tables and displays the rating tables respectively, and the user interface is used for the user to set at least one rating field of the channel and at least one level of the field. The control unit receives at least one channel signal, and determines whether to display the program of the channel on a display device according to the rating table stored in the storage unit, the rating information of the channel signal, and the fields and levels of the rating table set by the user.

One of the embodiments of the present invention provides a data screening method, including the following steps: first, receive a first signal and a second signal through a transmission channel, wherein the first signal includes a first audio-visual signal, a first At least one of a grading window and a first grading data, and the second signal includes at least one of a second audio-visual signal, a second grading window and a second grading data; according to the first grading window and At least one of the first grading data generates a first grading table, wherein the first grading table includes a plurality of grading fields, and each grading field includes a plurality of grading levels; then, according to the second grading form and At least one of the second grading data generates a second grading table, wherein the second grading table includes a plurality of grading fields, and each grading field includes a plurality of grading levels; stores the first grading table and the second grading table table; after that, set the grading fields and the grading levels in the first grading table and the second grading table through an interface. Finally, according to a channel selection signal, at least two of the first rating table and the second rating table, it is determined whether the first audio-visual signal and the second audio-visual signal are displayed on a display device.

One of the embodiments of the present invention provides a data screening system, comprising: a storage unit storing a plurality of classification tables, each of which contains at least one classification data and/or one classification window information of a channel signal, and Each grading table is planned into multiple grading fields, and each field includes multiple levels; the user interface receives the grading tables and displays the grading tables respectively, and the user interface is used for the user to set Determine at least one rating field of the channel and at least one level of the field; and the control unit receives at least one signal of the channel, according to the rating table stored in the storage unit, the rating information of the channel signal and the user-set Each field and level of the rating table determines whether to display the program of the channel on a display device.

The receiving system (parent-child lock protection system), data screening method and user interface of the embodiment of the present invention can store multiple groups of hierarchical forms, and has the function of editing the hierarchical forms for users to set arbitrarily, and has considerable advantages. convenience. Generally, various display devices only need to be provided with a single receiving system according to the embodiment of the present invention, and can achieve the effect of being widely applicable to multiple different grading specifications. At the same time, when the receiving system of the embodiment of the present invention processes channel signals, it is not necessary to repeatedly access the classification table, thereby speeding up the processing speed and efficiency of the system, and solving the problems of the known technology.

Description of drawings

FIG. 1A shows a schematic diagram of an embodiment of the receiving system of the present invention.

FIG. 1B shows a schematic diagram of an embodiment of a classification table of the receiving system of FIG. 1A .

FIG. 1C shows a schematic diagram of an embodiment of each classification table of the receiving system in FIG. 1A .

FIG. 1D shows a schematic diagram of an embodiment of a menu of the rating table of the receiving system in FIG. 1A .

FIG. 2A shows a flow chart of an embodiment of the setting method for filtering TV programs of the present invention.

FIG. 2B shows a schematic diagram of another embodiment of a menu of the rating table of the receiving system of the present invention.

[Description of main component labels]

10, 20 Parent-child lock protection system (receiving system) 22a Storage unit

11 Grading Scale 23 User Interface

21 receiving unit 24 judging unit

22 Processing unit C Control unit

Detailed ways

The receiving system with data screening mechanism (parent-child lock protection system) and the data screening method of the present invention will be described in detail below with reference to the drawings, and the same components will be marked with the same symbols.

FIG. 1A shows a schematic diagram of an embodiment of a receiving system 20 of the present invention. The receiving system 20 can be applied to any kind of display device currently existing or that may be developed in the future. The receiving system 20 includes a control unit C, a user interface 23, and a storage unit 22a. The control unit C includes a receiving unit 21 , a processing unit 22 and a judging unit 24 . In one embodiment, the storage unit 22 a is disposed in the processing unit 22 ; and in another embodiment, the storage unit 22 a can be disposed outside the processing unit 22 and replaced by an external storage unit.

The receiving unit 21 can receive one or more channel (Channel) signals to detect and collect information provided by the signals of these channels. In one embodiment, the receiving unit 21 can receive at least two channel signals time-divisionally or simultaneously, such as the first channel signal S1 and the second channel signal S2, wherein the first channel signal S1 includes a first channel corresponding to the channel of the first signal S1 At least one of the video signal IA, a first rating window DRRT (Downloadable Rating Region Table, DRRT), and a first rating data RD (Rating data, RD). The second channel signal S2 includes at least one of a second audio-visual signal IA', a second grading window DRRT', and a second grading data RD' corresponding to the second S2 channel of the signal.

The processing unit 22 is used for processing at least one hierarchical window DRRT and at least one hierarchical data RD. In one embodiment, the processing unit 22 may be a hierarchical window handler (DRRT Handler). In another embodiment, the processing unit 22 processes the first signal S1 according to at least one of the first grading data RD and the first grading window DRRT, and also processes the first signal S1 according to at least one of the second grading data RD' and the second grading window DRRT'. At least one of them processes the second signal S2, and generates a first classification table RT1 and a second classification table RT2 corresponding to the first signal S1 and the second signal S2 respectively, wherein the first classification table RT1 and the second classification table RT2 contains multiple grading fields Dim 1～Dim n (n is a positive integer), and each grading field Dim contains multiple grading levels Lv 1～Lv m (m is a positive integer) (the grading field Dim and the grading level Lv is shown in Figure 1B).

It should be noted that the processing unit 22 of an embodiment of the present invention includes at least one storage unit 22a, and the storage unit 22a is provided with a plurality of table storage spaces (Table entry) for storing a plurality of classification tables RT1, RT2... .

The user interface (UI) 23 is used to provide an operation interface for the user to set the program filtering method or program rating of the receiving system 20 . In one embodiment, the user interface 20 provides the user with the ability to set at least one of the grading fields Dim 1-Dim n and the grading levels Lv 1-Lv m in the first grading table RT1 and the second grading table RT2. at least one. It should be noted that the user interface 23 can also provide users with the ability to edit the names or numbers of the grading fields Dim 1 to Dim n in the first grading table RT1 and the second grading table RT2, and edit the first grading table RT1 and the second grading table RT1. Names or numbers of the grading levels Lv 1 to Lv m in the grading table RT2. In addition, the user interface 23 also provides the user with adding a rating table or deleting a rating table.

It should be noted that the format of the rating table RT in an embodiment of the present invention can be defined or standardized according to a preset TV station, a preset region, or a preset country. In one embodiment, as shown in FIG. 1B, the grading tables RT1 and RT2 may include a plurality of grading fields Dim 1 to Dim n, and each grading field Dim may include a plurality of levels Lv 1 to Lv m for use Or set at least one rating field Dim and at least one level Lv corresponding to the channel in the rating table. In addition, in one embodiment, the user interface 23 has various editing functions, and the user can use the user interface 23 to edit the name and number of the field Dim of the classification table, and the name and number of the editing level Lv; in another embodiment, the user The interface 23 has the function of editing the grading table, and the user can use the user interface 23 to add or delete the grading table.

It should be noted that, in one embodiment, the same field Dim of different rating tables RT can be set to have dependencies. For example, Dim1 of the first rating table RT1 is defined as the "violence" field, and Dim1 of the second rating table RT2 is also defined as "violence". field, when Dim1 of the first classification table RT1 is set to all levels Lv are blocked, Dim1 of the second classification table RT2 will also be automatically set to be all levels Lv all blocked because of the dependent design; another embodiment , the same level Lv of the same field Dim in different rating tables RT may have dependencies, for example, Dim2 of the first rating table RT1 is defined as the "pornography" field, and Dim2 of the second rating table RT2 is also defined as the "pornography" field, when the second When the level Lv5 of Dim2 of a grading table RT1 is set to be blocked, then the level Lv5 of Dim2 of the second grading table RT2 will also be automatically set as blocked; It can be set to have a preset sequence. For example, assume that the field Dim1 of the first grading table RT1 is defined as the "violence" field and is divided into 4 levels. Each level is distinguished by age. Level Lv1 is for children under six years old, level Lv2 is for children aged seven to twelve, level Lv3 is for teenagers aged thirteen to eighteen, and level Lv4 is for adults over nineteen years old. If the user sets level Lv3 as blocked, then levels Lv1 and Lv2 will be automatically set as blocked because the age is less than thirteen years old, which is sequential. Of course, in another embodiment, the above-mentioned same field Dim of different rating tables RT or the same level Lv of the same field Dim of different rating tables RT can also be set to have no dependencies; and multiple levels Lv of each field Dim can also be Set to non-sequential.

The judging unit 24 is used for judging how to output the signal S to the display device according to the parameters provided by the user setting the rating table RT through the user interface 23 and the rating data RD of the input signal S. In one embodiment, the judging unit 24 may be a Violent-ChipJudger. In another embodiment, the judging unit 24 can judge whether the first audio-visual signal IA or the second audio-visual signal IA' is output through the output signal 0 according to a channel selection signal CS, the first rating table RT1 and the second rating table RT2, to be displayed on A display device. In one embodiment, when the formats of the classification tables RT1 , RT2 . . . of the signals S1 , S2 . For example, when the format of the first rating table RT1 and the second rating table RT2 are the same, the judging unit 24 only needs to use RT2 to judge the signals S1, S2 . . . In another embodiment, when the formats of the first rating table RT1 and the second rating table RT2 are the same, the judging unit 24 will select the first rating by using one of "least used", "oldest", and "random selection" The table RT1 or the second grading table RT2 is used to judge the first signal S1 and the second signal S2.

The operation of the receiving system 20 according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1A and 1C .

Assume that the first channel signal S1 includes the audio-visual signal IA, the rating window DRRT1 and the rating data RD1, the rating window DRRT1 and the rating data RD1 correspond to the first rating table RT1 on the left half of the drawing in Figure 1C, and the rating table RT1 belongs to the first TV station The specification of setting; And the second channel signal S2 comprises audio-visual signal IA ', grading form DRRT2 and grading data RD2, grading form DRRT2 and grading data RD2 correspond to the second grading table RT2 on the right half of Fig. 1C drawing, and grading Table RT2 belongs to the specifications set by the second television station. It is also assumed that the storage space of the storage unit 22a of the processing unit 22 is preset to store five grading tables, and three grading tables have been stored in the storage unit 22a before detecting the channel signals S1 and S2, which are respectively the third channel signal S3 The rating table RT3 of the fourth channel signal S4, the rating table RT5 of the fifth channel signal S5. Wherein, the fifth channel signal S5 belongs to the second TV station, and its rating table RT5 has the same specifications as the second rating table RT2.

Firstly, the receiving unit 21 receives and detects the information of the first channel signal S1, processes and/or analyzes the first channel signal S1, and determines whether to obtain the hierarchical window DRRT1. If the grading window DRRT1 is obtained, it is judged whether the grading window DRRT1 of the current first channel signal S1 needs to be updated, and if an update is required, a network access unit (Access Point, AP) of the display device is notified to update the grading window DRRT1 . If the grading window DRRT1 is not obtained, the receiving unit 21 is notified to re-detect the first channel signal S1.

On the other hand, when the receiving unit 21 processes and/or analyzes the first channel signal S1, it also judges whether to obtain the hierarchical data RD1. If the grading data RD1 is obtained, it is judged whether the grading data RD1 of the current first channel signal S1 conforms to the specification (Legal). If the standard is met, a network access unit of the display device is notified that the current classification data RD1 meets the standard; if the classification data RD1 does not meet the standard (Illegal), the receiving unit 21 re-detects the first signal S1. It should be noted that the detection method of the second signal S2 is the same as that of the first signal S1 , so it will not be repeated here.

Next, the processing unit 22 processes the classification window DRRT1 and the classification data RD1 of the first signal S1 to generate a first classification table RT1.

It should be noted that the storage unit 22a of the processing unit 22 has stored three rating tables at this time: RT3, RT4, and RT5. Next, the processing unit 22 compares the rating table RT1 with RT3, RT4, and RT5, compares the difference between the specifications of the first rating table RT1 and the stored rating tables RT3, RT4, and RT5, and judges whether the first rating table RT1 is a new one. grading table. Assuming that the first rating table RT1 is a new rating table after the judgment, then the processing unit 22 will judge whether the new rating table RT1 is identical with the names of the stored rating tables RT3, RT4, and RT5; Table RT1 updates the grading table with the same name as the first grading table RT1 in the storage unit 22a, and provides it to the user interface 23; if different, then judge whether there is still space in the storage unit 22a, and if there is space, store the first grading table A classification table RT1, if there is no space, replace the first classification table RT1 with a classification table selected in the storage unit 22a in the oldest, least used or random manner, and then provide the user interface 23. Here, assuming that the name of the first classification table RT1 is different and the storage unit 22a still has space, the storage unit 22a stores the first classification table RT1. Therefore, at this time, the storage unit 22a has four hierarchical windows RT1 , RT3 , RT4 and RT5 .

It should be noted that when the second signal S2 is processed in the above manner to generate a second rating table RT2, the processing unit 22 compares the second rating table RT2 with the stored rating tables RT1, RT3, RT4, and RT5. Because RT2 and RT5 have been preset as belonging to the second TV station in the foregoing description, so the second rating table RT2 is an old rating table (that is, the specification of the second rating table RT2 is the same as that of the rating table RT5), then the processing unit 22 will The processing of the second rating table RT2 is aborted.

On the other hand, when receiving each signal S, the processing unit 22 compares the classification data RD in the signal S with all the classification tables RT in the storage unit 22a to find whether there is a classification table RT corresponding to the classification data RD. If not, stop processing the hierarchical data RD; if yes, provide the hierarchical data RD to the judging unit 24 for reference.

It should be noted that the data of each rating table RT is displayed on a display device through the user interface 23 in the manner shown in FIG. 1D . Next, the user can set the rating of each program channel through the user interface 23 . For example, assuming that the user sets the GradC field of the first grading table in Figure 1C, the user can use the various function options in the operation screen of Figure 1D, such as left, right, up, down, move, enter , Directory, Leave, All Allow, All Block, All Delete, etc., to set each level Lv (C1~C7) of the GradC field, for example, you can check All Allow, All Block or All Delete to implement All Allow respectively Each level Lv (C1 ~ C7), all block each level Lv (C1 ~ C7) and all delete the settings on each level for resetting. Of course, it is also possible to individually delete the settings on each level or block certain levels by checking each level Lv (C1-C7) respectively. In one embodiment, the user can also delete all rating tables RT stored in the storage unit 22a through the user interface 23, and add a new rating table RT. In this way, the receiving system of the present invention has considerable flexibility and convenience in practice. Wherein, in one embodiment, when clicking the function option "Left" in Figure 1D, you will enter the menu of the previous field Dim; when clicking "Right", you will enter the menu of the next field Dim; when clicking " When "Up" exceeds the position of level C1, it will enter the previous field Dim; when clicking "Down" exceeds the position of level C7, it will enter the next field Dim.

Finally, the judging unit 24 determines whether to output the signal 0 to display the video signal IA on the display device according to the rating table RT of the signal S, the rating data RD of the signal S, and a channel selection signal CS. In one embodiment, the channel selection signal CS may be a signal input by the user through the user interface. In another embodiment, the channel selection signal CS may be a signal generated according to each field Dim and each level Lv of the rating table RT set by the user.

The receiving system of the present invention has considerable convenience because it can store multiple sets of grading tables and has the function of editing the grading form for users to set arbitrarily. In addition, because the receiving system of the present invention has the function of storing multiple sets of rating tables and changing the rating tables flexibly, it can achieve a TV rating system that matches each TV station, each country, or each region.

FIG. 2A shows an embodiment of the setting method for filtering TV programs of the present invention. The setting method for filtering TV programs includes the following steps:

Step S304: Provide a TV for receiving signals of multiple channels, each signal includes at least one hierarchical window, and store the multiple hierarchical windows provided by the signals.

Step S306: Generate a plurality of rating tables according to the rating form data, and the rating tables are used for interacting with users. For example, the rating table menu illustrated in FIG. 1D and FIG. 2B is a user interface for interacting with the user. In Figure 2B, the user selects the level B1 of the block field Grad B, the selected action can be executed with a cursor, and the selected position can display a hatched square, a highlighted square or other representations that are sufficient to show that it has been selected , such as: use a small window to indicate that the field has been selected...etc. Information related to the receiving system, such as date, time, data rate, etc., can be configured at the bottom of the drawing for reference by users.

Step S308: Display all or part of a plurality of program images corresponding to the signals on the television.

Step S310: Simultaneously display a plurality of rating tables corresponding to the programs with all or part of the program screens, and the rating tables respectively include a plurality of rating fields, and the fields also respectively include a plurality of levels.

Step S312: The user sets the program filtering options of the channels one by one, selects at least one rating field and at least one level on the selected rating field. Wherein, the user uses a user control device to set the above-mentioned grading table. In one embodiment, the user control device can be one or a combination of remote controller, mouse, keyboard, voice control device, etc. Of course, a detector can also be designed in the display device to achieve the effect of controlling the device by detecting body movements of the human body, so as to achieve the effect of setting channel program filtering options.

Step S314: Allow channel programs matching the program filtering options to be displayed on the TV.

It should be noted that in one embodiment, the setting method for filtering television programs of the present invention further includes prohibiting channel programs that do not meet the program filtering options from being displayed on the television. In addition, the above rating table may include a program title and a program channel, and the program may be a TV program, a promotional video clip, or a prerecorded program. , a video on demand program (video on demand program), a quasi video on demand program (near video on demand program), or a paid program... and other types of programs that are currently existing or may be developed in the future.

It should be noted that one embodiment of the receiving system and related methods of the present invention uses the program filter chip (V-Chip) 2.0 specification to process the data of the hierarchical form DRRT, and of course it is also compatible with the program filter chip (V-Chip) 1.0 The data. In one embodiment, when the settings of the program filtering chip (V-Chip) 2.0 and the program filtering chip (V-Chip) 1.0 conflict, the setting of the program filtering chip (V-Chip) 2.0 can be used preferentially, that is , the setting of the program filter chip (V-Chip) 2.0 may have a higher priority.

To sum up the above, a general display device only needs to be equipped with one of the receiving systems of the above-mentioned embodiments of the receiving system of the present invention, and can be applied to a variety of different grading specifications. At the same time, when the receiving system of the present invention processes the channel signals, it does not need to repeatedly access the classification table, so the processing speed and efficiency of the system are accelerated, and the problems of the known technology are further solved.

Although the present invention has been described above with examples, the scope of the present invention is not limited thereto. Those in the industry can make various modifications or changes as long as they do not depart from the gist of the present invention.

Claims (25)

1. A data screening system, comprising: The receiving unit receives the first signal from the first channel and the second signal from the second channel through the transmission channel, wherein the first signal includes the first audio-visual signal, the first hierarchical data and the first hierarchical window At least one of them, and the second signal includes at least one of the second audio-visual signal and the second hierarchical data and the second hierarchical window; The processing unit processes the first signal according to at least one of the first hierarchical data and the first hierarchical window, and processes the second signal according to at least one of the second hierarchical data and the second hierarchical window. signal, and respectively generate a first classification table and a second classification table corresponding to the first signal and the second signal, wherein the first classification table and the second classification table respectively include a plurality of classification fields, and each The rating field contains multiple rating levels; a storage unit for storing the first classification table and the second classification table; a user interface for setting at least one of the grading fields and at least one of the grading levels in the first grading table and the second grading table; and The judging unit judges whether the first audio-visual signal and the second audio-visual signal are displayed on the display device according to the channel selection signal, the first rating table, and the second rating table. 2. The receiving system according to claim 1, wherein the transmission channel is optical fiber, coaxial cable, twisted pair or radio wave. 3. The receiving system according to claim 1, wherein the format of the rating table follows the specification of a preset TV station, a preset region or a preset country. 4. The receiving system according to claim 1, when the format of the first classification table is the same as the format of the second classification table, the judging unit will select one of the least used, oldest or randomly selected The first classification table or the second classification table is used to judge the first signal and the second signal. 5. The receiving system as claimed in claim 1, wherein the same classification field of the first classification table and the second classification table has dependencies. 6. The receiving system as claimed in claim 1, wherein the same classification fields of the first classification table and the second classification table have no dependencies. 7. The receiving system according to claim 1, wherein the same rating level of the same rating field of the first rating table and the second rating table have dependencies. 8. The receiving system of claim 1, wherein the same rating level of the same rating field of the first rating table and the second rating table have no dependencies. 9. The receiving system according to claim 1, wherein the hierarchical levels of the hierarchical fields have a preset sequence. 10. The receiving system according to claim 1, wherein the user interface is used to provide the user to edit the names or numbers of the classification fields in the first classification table and the second classification table, and to edit the first classification table. Names or numbers of the rating levels in the rating table and the second rating table. 11. The receiving system according to claim 1, wherein the user interface is used to provide a user with adding a rating table or deleting a rating table. 12. A data screening method, comprising: receiving a first signal and a second signal through a transmission channel, wherein the first signal includes a first audio-visual signal and at least one of the first hierarchical window and the first hierarchical data, and the second signal includes a second audio-visual signal the signal and at least one of the second hierarchical window and the second hierarchical data; According to at least one of the first grading form and the first grading data, a first grading table is generated, wherein the first grading table includes a plurality of grading fields, and each grading field includes a plurality of grading levels; According to at least one of the second grading form and the second grading data, a second grading table is generated, wherein the second grading table includes a plurality of grading fields, and each grading field includes a plurality of grading levels; storing the first rating table and the second rating table; setting the grading fields and the grading levels in the first grading table and the second grading table through an interface; and According to at least two of the channel selection signal, the first rating table or the second rating table, it is determined whether the first audio-visual signal and the second audio-visual signal are displayed on the display device. 13. The method according to claim 12, wherein the step of determining whether the first audiovisual signal and the second audiovisual signal are displayed on the display device further comprises: selecting one of the first channel and the second channel as a channel to be displayed on the display device according to the channel selection signal; and According to the rating table corresponding to the channel, the audio-visual signal of the channel is screened to determine whether to display it on the display device. 14. The method according to claim 12, wherein the rating fields of the first rating table are used to partially or completely prohibit the display of the first audio-visual signal on the display device. 15. The method according to claim 12, wherein the classification levels of the first classification table are used to partially or completely prohibit the display of the first audio-visual signal on the display device. 16. The method of claim 12, further comprising prohibiting channel programs not meeting the program filtering options from being displayed on the television. 17. The method according to claim 12, wherein the first classification table includes the title and channel number of the first audio-visual signal of the first channel. 18. The method according to claim 12, wherein the first video signal is a TV program, a promotional video clip, a pre-recorded program, a video-on-demand program, a quasi-video-on-demand program or a premium program. 19. The method according to claim 12, wherein the interface is one or a combination of a remote controller, a mouse, a keyboard, and a voice control device. 20. The method according to claim 12, wherein the interface is a detector capable of detecting user's body movements or facial expressions. 21. A data screening system comprising: The storage unit stores a plurality of classification tables, and each classification table contains at least one classification data and/or a classification window information of a channel signal, and each classification table is planned as a plurality of classification fields, and each field contains There are multiple levels; a user interface for receiving the rating tables and displaying the rating tables respectively, the user interface is used for the user to set at least one rating field and at least one level of the field for the channel; and The control unit receives at least one channel signal, and determines whether to display the channel on a display device according to the rating table stored in the storage unit, the rating information of the channel signal, and the fields and levels of the rating table set by the user program. 22. The data screening system according to claim 21, wherein the format of the rating table is designed by a preset TV station, a preset region, or a preset country. 23. The data screening system according to claim 21, when different channel signals have the same rating table format, the control unit will use the same rating table stored in the storage unit to judge the different channel signals. 24. The data screening system according to claim 21, wherein the user uses the user interface to edit the name of the classification table field, the number of fields, and edit the name and number of the level. 25. The data screening system as claimed in claim 21, wherein the user utilizes the user interface to add a rating table or delete a rating table.

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