KR101414306B1 - Receiver for digital broadcast, Digital broadcast system, and method for abstracting RRT data - Google Patents

Abstract

The digital broadcasting system according to the present invention can be applied not only to Program and System Information Protocol (PSIP) data, which is easy to change among digital video signals, but also to RRT (Rating Region Table) The RRT data change in the local broadcasting station can be prevented, and the manufacturer of the digital broadcasting receiver can additionally provide RRT data to the receiver in addition to the broadcasting station.

Digital broadcasting, receiver, RRT, PSIP, program data

Description

Technical Field [0001] The present invention relates to a RRT data extraction method for a digital broadcasting receiver, a digital broadcasting system, and a digital broadcasting receiver,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcasting system, and more particularly, to a digital broadcasting system for processing a digital broadcasting signal so as to prevent a change of RRT data by a digital broadcasting signal relay.

2. Description of the Related Art Generally, a digital broadcasting system compresses and transmits digital video and audio data using a predetermined compression algorithm, for example, a hybrid coding algorithm, restores compressed and transmitted video and audio data to original data, ≪ / RTI >

On the other hand, the data included in the digital broadcasting signal includes the compression-encoded video and audio data as described above, and various control data for managing and controlling the operation of the digital broadcasting receiver are included.

That is, the digital broadcasting signals provided by the digital broadcasting system are classified into two types: program data and program and system information protocol (PSIP) data. The program data refers to, for example, a TV program provided by a broadcaster for the purpose of being broadcasted to a subscriber, and includes data such as video data, audio data, and caption data.

The PSIP data includes a modulation scheme, a carrier frequency, and a packet ID for demultiplexing video and audio data from a packet stream transmitted on a carrier channel, which are necessary for normal reception of a broadcast program of each channel, (Including a program title, a start time of a program, a simple additional description, etc.), the presence of a caption service, a rating of a program, current time data, and the like.

Accordingly, when a predetermined digital broadcast channel is selected, the digital broadcast receiver demultiplexes the PSIP data from the packet stream after being tuned to the corresponding broadcast channel, stores the PSIP data in an internal memory, Demultiplex the data.

In addition, the digital broadcast receiver uses various data tables included in the PSIP data to inform the user of simple additional information about the TV broadcast program, presence of caption service, rating of the program, and schedule of the TV broadcast program .

In particular, according to the standard of the digital broadcasting system, the PSIP data table inserted into the digital broadcasting signal includes RRT (Rating Region Table) data. The RRT data includes area codes used in the RS (Rating System) The name of the RS, the number of RSs used in the area, and the name of each RS.

In other words, the RRT is a table that displays data on a rating of a broadcast program corresponding to various geographical regions.

For example, if blocking is set for a broadcast program that can be viewed only by a user over 14 years of age for a digital broadcast receiver in the United States, .

A method of setting a rating of a digital broadcast program using the above-described conventional RRT data has the following problems.

The RIP data is included in the PSIP data generated separately from the program data. The PSIP data is transmitted to a final transmitting side that performs broadcasting, for example, a local area where the central broadcasting station 10 receives and broadcasts data as shown in FIG. The broadcast station 20 or the like.

That is, the central broadcasting station 10 transmits the program data and the PSIP data including the RRT data to the local broadcasting station 20, and the local broadcasting station 20 has a relationship with the central broadcasting station 10 It is common to modify the transmitted PSIP data. The modification of the PSIP data is performed by changing the existing PSIP data, deleting the existing PSIP data and inserting the new PSIP data. The modified PSIP data is transmitted to the central broadcasting station 10 And broadcast through the transmission system 30 installed together.

The user watches the digital broadcast signal (including program data and PSIP data) transmitted from the transmission system 30 through the digital broadcast receiver 40. At this time, the digital broadcast receiver 40 receives the digital broadcast signal ) Is used in the PSIP data.

The change of the PSIP data is generally performed for changing the broadcast time or the like, but it is also possible to change the RRT data in some cases.

If the RRT data is intentionally changed or unintentionally changed in the process of changing the PSIP data, the viewer, that is, the user of the digital broadcasting receiver, may use inconsistent RRT data, resulting in confusion.

Since the RRT data is data to be shared by all broadcasting stations, it is necessary to prevent the possibility of such RRT data being changed.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and it is an object of the present invention to prevent RRT data from being changed in a broadcasting process.

Accordingly, reliable RRT data can be provided to the user, and the RRT data according to the new standard can be quickly upgraded by allowing the manufacturer of the digital broadcasting receiver to receive the RRT data, .

According to an aspect of the present invention, there is provided a program data generating apparatus for generating program data including video data, audio data, and caption data; And an RRT data insertion unit for adding RRT (Rating Region Table) data to the generated program data.

In this case, it is preferable to further include a PSIP data generator for generating PSIP (Program and System Information Protocol) data. In this case, the RRT data inserting unit may add the RRT data to the generated PSIP data.

The RRT data inserting unit may add the RRT data to the video data in the program data. Here, the RRT data is preferably added to the user data area of the video data.

According to another aspect of the present invention, there is provided a digital broadcasting receiver including: a receiving unit for receiving a digital broadcasting signal including program data and video and audio data, and Program and System Information Protocol (PSIP) data; And an RRT data updater for extracting and updating RRT (Rating Region Table) data added to the program data from the received digital broadcasting signals.

At this time, the RRT data update unit preferably extracts RRT data added to the video data from the program data and updates the extracted RRT data.

The present invention also provides a digital broadcasting signal generating apparatus comprising: a broadcasting station having a digital broadcasting signal generating apparatus as described above and a transmitting section for transmitting a digital broadcasting signal generated by the digital broadcasting signal generating apparatus; And a digital broadcasting receiver for receiving the digital broadcasting signal as described above.

Here, the RRT data may be manufacturer RRT data generated and provided by the manufacturer of the digital broadcasting receiver, wherein the manufacturer RRT data is added to the program data of the manufacturer to be provided to the broadcasting station .

The RRT data updater of the digital broadcasting receiver may further include a manufacturer RRT data extractor for extracting the manufacturer RRT data.

In operation of the digital broadcasting receiver, a digital broadcasting signal is received from a broadcasting station and separated into program data and PSIP data, and RRT data is extracted from the separated program data.

As described above, the digital broadcasting system according to the present invention adds RRT data to program data that is not easily changed from PSOB data, which is easy to change among digital video signals, RRT data is prevented from being changed.

Also, by providing the RRT data to the manufacturer of the digital broadcasting receiver, it is possible to provide the RRT data in accordance with the user's request, and to upgrade only the digital broadcasting receiver manufactured by the manufacturer.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, let's look at an example of a bit stream syntax of the RRT (Rating Region Table) through FIG.

In FIG. 2, the "table_id" field is composed of 8 bits and may have a value of '0xCA', which means that the table is used as a RRT (Rating Region Table).

The "section_syntax_indicator" field is composed of 1 bit and may have a value of '1', which means that the section follows the generic section syntax.

The "private_indicator" field is composed of 1 bit and can have a value of '1'.

The "section_length" field consists of 12 bits, which means the number of bytes remaining in the section.

The "rating_region" field is made up of 8 bits and refers to a specific area to which the broadcasting grade is applied.

The "version_number" field is composed of 5 bits, and when any field of the RRT is changed, the field value is changed.

The "current_next_indicator" field consists of 1 bit, and can always be set to a value of '1'.

The "section_number" field is composed of 8 bits and can always be set to a value of '0x00'.

The "last_section_number" field is composed of 8 bits and can always be set to a value of '0x00'.

The "protocol_version" field is composed of 8 bits and can always be set to a value of '0x00'.

The "rating_region_name_length" field is composed of 8 bits, and defines the total length of the field "rating_region_name_text ()"

The "rating_region_name_text ()" field indicates a data structure including a multiple string structure indicating a rating region name to which a broadcast grade is applied.

The "dimensions_defined" field consists of 8 bits and means the number of defined dimensions defined in the "rating_region_table_section () ".

The "dimension_name_length" field is composed of 8 bits and defines the total length of the "dimension_name_text ()" field to be continued.

The "dimension_name_text ()" field means a data structure including a multiple string structure representing a dimension name described in a loop.

The "graduated_scale" field consists of 1 bit, and defines, in the dimension, whether the rating value has a graduated scale.

The "values_defined" field consists of 4 bits and defines the number of values defined in the particular dimension.

The "abbrev_rating_value_length" field is composed of 8 bits, and defines the total length of the field "abbrev_rating_value_text ()"

The "abbrev_rating_value_text ()" field indicates a data structure including a multiple string structure indicating an abbreviated name of a certain rating value.

The "rating_value_length" field consists of 8 bits and defines the total length of the "rating_value_text ()"

The "rating_value_text ()" field refers to a data structure that includes a multiple string structure that represents the full name of a particular rating value.

The "descriptors_length" field indicates the length of all descriptors following the field.

The "descriptor ()" field may contain a necessary descriptor.

Such RRT data is included in the PSIP data, but is included in the program data including the video data, the audio data, and the caption data instead of the PSIP data in the present embodiment. To this end, the digital broadcasting signal generating apparatus according to the present embodiment includes a program data generating unit 110 for generating program data including video data, audio data, and caption data as shown in FIG. 2; And an RRT data inserting unit 120 for adding RRT (Rating Region Table) data to the generated program data, so that RRT data can be added to the program data.

On the other hand, the program data to which the RRT data is added is preferably video data necessarily included in digital broadcasting.

For example, as shown in FIG. 4, the RRT data may be attached to a user data area in a header of video data for carrying caption data, It can not be modified in the subsequent transmission process. In other words, it means that it is not possible to make changes in the relay station, the local broadcasting station, and the like other than the central broadcasting station, and the modification includes all cases in which the relay is intentionally changed or not.

FIG. 4 illustrates a method in which RRT data is divided into parts and added to the user data area in the video data. A header is added to the divided RRT data to allow the digital broadcasting receiver to recognize that the RRT data is RRT data.

In this case, the RRT data may be added to both the PSIP data and the program data or to the program data, so that the transmission may be performed by the PSIP data generating unit (not shown) In the digital broadcasting receiver, it is possible to selectively extract RRT and analyze RRT data to apply or update new information.

In this case, it is preferable that the RRT data inserter 120 add the RRT data to the PSIP data.

The RRT data added to the program data can be set as shown in the following Table 1 as an example.

Dimension Sports (sports) Cruelty Humor Grade 0 One One
Value
baseball slight devoid football cruel humor golf hardgore exception

The RRT data has three dimensions, and the naming of each dimension is set to sports, cruelty, and humor, and grades are listed in each dimension.

Based on this, each program data is given its own rating corresponding to the RRT data.

In this manner, when a digital broadcast signal to which RRT data is added to program data other than the existing PSIP data is broadcasted, the digital broadcast receiver for receiving the digital broadcast signal and the corresponding element should be provided.

That is, as shown in FIG. 5, a receiving unit 210 receives a digital broadcasting signal including program data and program and system information protocol (PSIP) data including video data, audio data, and caption data from a broadcasting station. And an RRT data updater 220 for extracting and updating RRT (Rating Region Table) data added to the program data from the received digital broadcasting signals.

The receiving unit 210 is the same as the receiving unit of the digital broadcasting receiver in the conventional digital broadcasting receiver, and a detailed description thereof will be omitted.

The RRT data updater 220 extracts the RRT data from the program data instead of extracting the RRT data from the PSIP data. In some cases, the RRT data updater 220 may extract the RRT data from the PSIP data.

The RRT data extraction from the program data is preferably performed using RRT data included in the video data among the program data. This is because the above-mentioned digital broadcasting signal generating apparatus is assumed to add RRT data to video data do.

The addition of the RRT data to the video data among the various data included in the program data makes use of the property that the video data is necessarily included in the broadcasting due to the broadcasting characteristic, unlike the audio data which can be omitted in some cases.

The digital broadcasting system using the digital broadcasting signal generator and the digital broadcasting receiver as described above will be described with reference to FIGS. 6 and 7. FIG.

6, a broadcasting station 300 having a digital broadcasting signal generating apparatus 100 shown in FIG. 3 and a transmitting unit 310 for transmitting a digital broadcasting signal generated by the digital broadcasting signal generating apparatus 100, ; The digital broadcasting system 200 includes the digital broadcasting receiver 200 shown in FIG. 5 that receives the digital broadcasting signal.

As described above, the digital broadcast signal generating apparatus 100 includes a program data generating unit for generating program data including video data, audio data, and caption data to add RRT data to at least program data, And an RRT data insertion unit for adding RRT (Rating Region Table) data.

Accordingly, when the digital broadcasting signal is generated through the digital broadcasting signal generating apparatus 100, RRT data is included in the program data, and PSIP data and the like are included therein to form a digital broadcasting signal (broadcast stream) used for actual broadcasting.

The digital broadcasting signal is directly broadcast through a central broadcasting station or through an intermediate local broadcasting station. Of course, the transmission unit 310 for transmitting a digital broadcasting signal is used for the broadcasting.

The digital broadcast receiver 200 receives the digital broadcast signal transmitted in this way, and the digital broadcast receiver 200 extracts and updates the RRT data added to the program data using the RRT data updater.

Since the RRT data broadcast through the above process is included in a program data area which is not modified by an intermediary such as a local broadcasting station, unlike the PSIP, the digital broadcasting receiver 200 can not obtain the same RRT data As shown in FIG.

Thus, the user is made available to reliable RRT data that is unlikely to change in any region.

The digital broadcasting signal generator may be provided by a manufacturer of a digital broadcasting receiver, not a broadcasting station.

That is, as shown in FIG. 7, the manufacturer 500 of the digital broadcasting receiver uses the digital broadcast signal generating apparatus when generating the advertisement stream of the manufacturer (including the advertisement program data), thereby transmitting RRT data different from the broadcasting station to the advertisement stream To the user.

Since the advertisement stream is broadcasted through the broadcast station 400 but the RRT data is added to the program data, the advertisement stream can not be changed in the broadcast station 400. The manufacturer of the digital broadcasting receiver generates the RRT data different from the broadcasting station in order to provide the service to the consumer by the manufacturer 500 of the digital broadcasting receiver capable of responding promptly to the broadcasting station in response to the international standard, It is also possible to directly generate RRT data in accordance with the user's request.

Of course, in this case, since it may be different from the RRT data generated by the broadcasting station, it is desirable to allow the user to select the broadcasting station RRT data and the manufacturer RRT data, and the manufacturer RRT data can not be used in the digital broadcasting receiver manufactured by the other manufacturer .

To this end, the digital broadcasting receiver manufacturer preferably further includes a manufacturer RRT data extractor (not shown) in the RRT data updater so that the manufacturer RRT data can be extracted from the digital broadcasting receiver 250 produced by the manufacturer.

Accordingly, the digital broadcasting receiver 250 produced by the user can extract and update the manufacturer's RRT data from the advertisement stream broadcast through the broadcasting station, and then apply the RRT when receiving another digital broadcasting signal.

Of course, it is preferable that the RRT data generated by the broadcasting station and the manufacturer RRT data are separately managed so that the user can select and use the desired RRT data at any time.

8 and 9, a digital broadcast signal is received from a broadcasting station (S610), separated into program data and PSIP data (S620), and then separated RRT data is extracted from the program data (S630).

In more detail, after separating the program data and the PSIP data (S620), it is determined whether the RRT data is added and whether the RRT data is added to the program data or the PSIP data (S631) If the RRT data is added to both the PSIP data and the PSIP data, one of the RRT data is selected and extracted by the user's selection (S 633).

If the RRT data is added to only one of the program data and the PSIP data, the RRT data is extracted (S 635). If the RRT data is not added to any of the program data and the PSIP data, no action is taken Accordingly, the user is informed that there is no RRT data. In this embodiment, it is desirable to extract RRT data from program data. However, it is preferable to extract RRT data, that is, extract RRT data from PSIP data, even for an existing method of adding RRT data to PSIP data.

After the RRT data added to the program data and the PSIP data is obtained (S 631), the RRT data extracted from the program data and the RRT data extracted from the PSIP data are separated It can be stored in memory, loaded by user's choice, or used for upgrading. This case is useful when the user desires to use other RRT data later.

A program data provider for generating program data used for digital broadcasting, a broadcasting station for broadcasting the program data, and a digital broadcasting receiver for receiving the program data.

1 is a schematic diagram showing a conventional digital broadcasting system;

2 is a schematic diagram showing an example of a bitstream syntax of RRT data;

3 is a block diagram illustrating an apparatus for generating a digital broadcast signal according to an exemplary embodiment of the present invention.

FIG. 4 is a schematic diagram showing a manner in which RRT data is added to video data used in FIG. 3; FIG.

5 is a block diagram illustrating a digital broadcasting receiver according to an exemplary embodiment of the present invention.

6 is a schematic diagram illustrating a digital broadcasting system according to a preferred embodiment of the present invention.

7 is a schematic view according to another example of Fig.

FIG. 8 is a flowchart illustrating a method of extracting RRT data of a digital broadcasting receiver according to an exemplary embodiment of the present invention. Referring to FIG.

Fig. 9 is a flowchart specifically showing Fig. 8. Fig.

Description of the Related Art [0002]

110 ... Program data generation unit 120 ... RRT data insertion unit

210 ... reception unit 220 ... RRT data update unit

100 ... digital broadcast signal generating apparatus 200 ... digital broadcast receiver

Claims (7)

A receiving unit for receiving at least broadcast signals including at least video data, program data including RRT (Rating Region Table) data attached to the video data, and Program and System Information Protocol (PSIP) data; And And an update unit for extracting and updating RRT data attached to the video data in the received broadcast signal, wherein the RRT data is attached to a user data area in a header of the video data. delete A broadcast signal generating device including a generator for generating program data having video data and audio data, and an insertion unit for attaching RRT data to the generated program data; and a transmitter for transmitting the broadcast signal generated by the broadcast signal generator, A broadcasting station including a transmitting unit for transmitting the broadcasting signal; And The broadcast system of claim 1, wherein the broadcast receiver receives the broadcast signal, and the RRT data includes manufacturer RRT data generated and provided by a manufacturer of the broadcast receiver. delete The method of claim 3, Wherein the manufacturer RRT data is added to the manufacturer's advertising program data and provided to the broadcasting station. 6. The method of claim 5, Wherein the updating unit of the broadcast receiver further includes an extracting unit for extracting RRT data. Receiving a broadcast signal from a broadcast station; Separating the received broadcast signal into program data and PSIP data; And And extracting RRT data from the separated program data, wherein the RRT data is attached to a user data area in a header of video data of the program data.

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